A three-dimensional compression bag and a luggage with the same

Abstract

The utility model provides a kind of three-dimensional compression bag 1, 4, comprising: sealed cavity: by top layer 51, 61, bottom layer 52, 62 and peripheral surface layer 53, or symmetrical side layer 63A, 63B are enclosed and sealed connection formation;Wherein, the peripheral surface layer 53 is sequentially arranged between the top layer 51 and the bottom layer 52 around;Or the side layer 63A, 63B is symmetrically distributed in the top layer 61 and the bottom layer 62 two sides, the top layer 61 extends to the bottom layer 62 around connection;Peripheral surface layer 53 in the utility model is sequentially constituted with a surface layer material, so when sealing assembly is arranged in peripheral surface layer 53, air-tight zipper 2 can be arranged in at least two sides, so that air compression bag opening is more open, and it is convenient for user to take and place article.

Description

Technical Field

[0001] This utility model relates to the field of daily necessities technology, specifically to a three-dimensional compression bag and a bag having the three-dimensional compression bag. Background Technology

[0002] As people's living standards improve, outdoor activities, travel, and business trips are becoming increasingly important parts of people's lives and work. Suitcases are also essential tools for carrying luggage. People need to carry more and more clothing and other items when traveling, and existing suitcases cannot meet the demand for carrying more items and achieving lightweight travel. Furthermore, traditional suitcases have a fixed internal volume, making it impossible to increase the carrying capacity by compressing clothing. To solve these problems, vacuum compression bags have been proposed for the internal cavity of suitcases, backpacks, and handbags. However, these vacuum compression bags are usually formed by two bag bodies fixedly connected, with each bag body's upper or lower layer fixedly connected to several side walls at the edges, and these side walls being fixedly connected to each other at the edges. However, the fixed connection of adjacent side wall edges creates uneven steps and extra edges. Airtight zippers cannot be installed smoothly and stably across the side wall edges, and even if airtight zippers are installed, their airtightness and stability cannot be guaranteed. Therefore, this type of vacuum compression bag cannot have airtight zippers installed across the side wall edges; zippers can only be installed on one surface layer, which limits the size of the vacuum compression bag opening and makes it inconvenient for users to take out and put in items.

[0003] Meanwhile, when the vacuum compression bag is folded into the suitcase, the top and bottom layers are randomly attached, resulting in problems such as loose adhesion, misalignment of the folding position, looseness after folding, and unevenness. Summary of the Invention

[0004] The purpose of this utility model is to provide a three-dimensional compression bag 1, 4, comprising: a sealed cavity: formed by a top layer 51, 61, a bottom layer 52, 62 and a peripheral layer 53, or symmetrical side layers 63A, 63B enclosing and sealing the cavity; wherein, the peripheral layer 53 is arranged end to end in a ring around the top layer 51 and the bottom layer 52; or the side layers 63A, 63B are symmetrically distributed on both sides of the top layer 61 and the bottom layer 62, and the top layer 61 extends to the bottom layer 62 in a ring connection.

[0005] Sealing assembly: includes an airtight zipper 2 disposed on the peripheral layer 53 or the top layer 61; and a one-way valve 3 disposed on the top layers 51 and 61;

[0006] The folding optimization structure includes a first concave fold 30 located at the geometric center point region of the peripheral layer 53, or a second concave fold 70 located at the symmetrical center point region of the side layers 63A and 63B, and a third concave fold 70A and a fourth concave fold 70B located at the edges of the side layers 63A and 63B and extending symmetrically along both sides of the second concave fold 70.

[0007] Since the peripheral layer 53 in this application is composed of a single piece of material joined end to end, when the sealing component is set on the peripheral layer 53, the airtight zipper 2 can be set on at least two sides, making the opening of the empty compression bag larger and facilitating the user to take out and put in items; at the same time, the concave fold lines set on each surface layer enable the three-dimensional compression bag to fold along a preset path when folding, eliminating human operation or random errors, improving folding speed, and ensuring that the three-dimensional compression bag is flat and consistently recessed into the inner cavity of the suitcase.

[0008] Preferably, the first concave fold 30, the second concave fold 70, the third concave fold 70A, and the fourth concave fold 70B are V-shaped, concave, or U-shaped indentations; the depth of the indentation is 10-50% of the thickness of the surface layer.

[0009] Preferably, it also includes a connecting structure for fitting the three-dimensional compression bag with an external bag. The connecting structure includes a first connecting strip 40 extending outward from the outer periphery of the sealed cavity, starting from a region 20 mm above and below the geometric center point of the peripheral layer 53; or a second connecting strip 80 extending outward from the outer periphery of the sealed cavity, starting from a region 20 mm above the fourth concave fold 70B.

[0010] Preferably, the first connecting strip 40 starts from the geometric center point of the peripheral layer 53; the second connecting strip 80 starts from the fourth concave fold 70B.

[0011] Preferably, the first connecting strip 40 and the second connecting strip 80 are formed by connecting one side of a single strip to the surface layer to form an L-shape, or by forming two strips, wherein the inner side of the two strips abuts against the outer side of the raised area and is connected to the surface layer to form a T-shape.

[0012] Preferably, the airtight zipper 2 includes a zipper head 21, cover fastening portions 22A and 22B formed of thermoplastic polyurethane elastomer or polyvinyl chloride located on both sides of the zipper head 21, and a zipper head receiving portion 23 and a zipper head stop portion 24 located at both ends of the airtight zipper 2, and a pull buckle 29 provided on the extension line of the zipper head receiving portion 23 for pulling the zipper head 21 handle 25.

[0013] Preferably, the top layer (51) and the upper surrounding layer (53A) are recessed into the bottom layer (52) and the lower surrounding layer (53B) for contact; the contact area between the top layer (51) and the upper surrounding layer (53A) and the bottom layer (52) and the lower surrounding layer (53B) is ≥80%;

[0014] Alternatively, the top layer 61 and the upper side layers 63A1 and 63B1 are recessed into the bottom layer 62 and the lower side layers 63A2 and 63B2 to contact each other, and the contact area between the top layer 61 and the upper side layers 63A1 and 63B1 and the bottom layer 62 and the lower side layers 63A2 and 63B2 is ≥80%.

[0015] Preferably, all the outer layers of the three-dimensional compression bag are composed of a fabric-plastic composite consisting of a textile layer and a polymer film layer.

[0016] Preferably, the textile layer is made of any one or more of nylon, polyester, acrylic, polypropylene, aramid, cotton and linen, non-woven fabric, and polyester-cotton-polyester blends.

[0017] Preferably, the polymer film layer is made of any one or more of polyurethane, polyvinyl chloride, polyolefin, polyamide, polyester, and silicone.

[0018] Preferably, the horizontal cross-sectional shape of the three-dimensional compression bag includes a rectangle, a square, a cylinder, a triangle, or a trapezoid.

[0019] Another objective of this utility model is to provide a method for manufacturing the above-mentioned three-dimensional compression bag, comprising the following steps:

[0020] 1. Material composite steps: The textile layer and the polymer film layer are coated with adhesive and then laminated or coated to form a fabric-plastic composite blank.

[0021] 2. Structural forming steps: The fabric-plastic composite blank is die-cut to form a top layer, bottom layer, peripheral layer, and side layer, and high-frequency welding is performed on the corresponding positions to create concave fold lines;

[0022] 3. Connecting strip assembly steps: Fix the roots of the first connecting strip 40 and the second connecting strip 80 at the corresponding positions using high-frequency welding, ultrasonic welding or adhesive.

[0023] 4. Component integration steps: Install the airtight zipper 2 in the corresponding position by high frequency welding, and fix the one-way valve 3 to the top layer 51 and 61; and weld the ends of the integrated peripheral layer 53 and / or bottom layer 62.

[0024] 5. Bag forming steps: The integrated top layer 51, bottom layer 52, and peripheral layer 53 are high-frequency welded using a copper or aluminum mold of the forming size; After the integrated top layer 61, bottom layer 62, and peripheral layer 63 are folded inward, the other two sides are high-frequency welded using a copper or aluminum straight strip mold.

[0025] Preferably, the adhesive used in step 1 is a two-component polyurethane or reactive polyurethane hot melt adhesive, and the coating amount is 20-30 g / m². 2 The composite temperature is 100-150℃, the pressure is 0.5-0.8MPa, and the composite speed is 5-10m / min.

[0026] Preferably, in step 2: the molding of the concave fold is done using a V-shaped, concave, or U-shaped indentation tool, and the indentation depth is 10-50% of the total thickness of the fabric-plastic composite.

[0027] Preferably, in steps 2, 3, 4 or 5: the high-frequency welding conditions are a frequency of 27.12MHz ± 5%, a power of 5-10kW, and a welding time of 3-10s.

[0028] Preferably, step 5 is followed by: a leak detection step, and helium mass spectrometry leak detection to control the leak rate to ≤1×10⁻⁶. 16 Pa·m 3 / s, negative pressure test, test conditions are -20kPa maintained for 24h.

[0029] Another objective of this utility model is to provide a bag having the above-mentioned three-dimensional compression bag, comprising:

[0030] The inner wall of the bag has a storage slot for storing the three-dimensional compression bag after folding; an anchoring part 100 is provided around the inner wall of the bag, which is detachably or fixedly connected to the corresponding first connecting strap 40; or an anchoring part 100 is provided at the bottom of the bag, which is detachably or fixedly connected to the corresponding second connecting strap 80.

[0031] Preferably, the detachable connection includes: zipper assembly 42 connection: a first chain strap 42A is sewn to the anchoring part 100, and a second chain strap 42B is sewn to the end of the connecting strap;

[0032] Or, the hook side of the hook and loop fastener assembly is fixed to the anchoring part 100, and the loop side of the hook and loop fastener assembly is fixed to the end of the connecting strip.

[0033] Alternatively, a snap-fit ​​assembly can be used for connection: the male snap-fit ​​assembly is embedded in the anchoring part 100, and the female snap-fit ​​assembly is fixed to the end of the connecting strip;

[0034] Alternatively, a magnetic attraction assembly can be used: the N-pole magnetic strip of the magnetic attraction assembly is embedded in the anchoring part 100, and the S-pole magnetic strip of the magnetic attraction assembly is fixed to the end of the connecting strip; the magnetic attraction force is ≥3N / cm. 2 .

[0035] The anchoring part 100 is continuously or intermittently arranged around the inner wall of the bag.

[0036] Preferably, the anchoring part 100 is a webbing or a thermoplastic polyurethane injection molded base, with a width of 1-3cm and a tensile strength ≥500N. Attached Figure Description

[0037] Figure 1 A schematic diagram of the structure of the first type of three-dimensional compression bag 1 provided in Embodiment 1 of this utility model;

[0038] Figure 2 A schematic diagram of the structure of the second type of three-dimensional compression bag 4 provided in Embodiment 1 of this utility model;

[0039] Figure 3 A schematic diagram of the folded structure of the first type of three-dimensional compression bag 1 provided in Embodiment 1 of this utility model;

[0040] Figure 4 A schematic diagram of the folded structure of the second type of three-dimensional compression bag 4 provided in Embodiment 1 of this utility model;

[0041] Figure 5 A schematic diagram of the cross-sectional shape of the concave fold line in Embodiment 1 of this utility model;

[0042] Figure 6 A schematic diagram of the connecting strip structure in Embodiment 1 of this utility model;

[0043] Figure 7 A schematic diagram of the airtight zipper structure in Embodiment 1 of this utility model;

[0044] Figure 8 One of the schematic diagrams of the anchoring part structure in Embodiment 3 of this utility model;

[0045] Figure 9 Schematic diagram of the anchoring part structure in Embodiment 3 of this utility model (II);

[0046] Figure 10 An unfolded schematic diagram of a suitcase with a first type of three-dimensional compression bag 1 in Embodiment 3 of this utility model shows an airtight zipper on the circumferential layer;

[0047] Figure 11 The present invention, in embodiment 3, shows a schematic diagram of the structure of the first type of three-dimensional compression bag 1 after folding inside a suitcase;

[0048] Figure 12An unfolded schematic diagram of the suitcase with the second type of three-dimensional compression bag 4 in Embodiment 3 of this utility model shows an airtight zipper on the top layer;

[0049] Figure 13 A schematic diagram of the structure of the second type of three-dimensional compression bag 4 after folding inside the suitcase in Embodiment 3 of this utility model;

[0050] Figure 14 One of the schematic diagrams of the zipper assembly connection structure in Embodiment 3 of this utility model;

[0051] Figure 15 Schematic diagram of the zipper assembly connection structure in Embodiment 3 of this utility model (II);

[0052] Figure 16 The schematic diagram of the backpack with the first type of three-dimensional compression bag 1 in Embodiment 3 of this utility model shows an airtight zipper on the peripheral layer;

[0053] Figure 17 The present invention, in embodiment 3, shows a schematic diagram of the structure of the first type of three-dimensional compression bag 1 after folding inside a backpack;

[0054] Figure reference numerals: 1, 4: 3D compression bag; 51, 61: Top layer; 52, 62: Bottom layer; 63A, 63B: Side layers; 63A1, 63B1: Upper side layer; 63A2, 63B2: Lower side layer; 53: Peripheral layer; 53A: Upper periphery; 53B: Lower periphery; 2: Airtight zipper; 21: Zipper pull; 22A, 22B: Cover fastener; 23: Zipper pull 24. Receiving part; 25. Slipper stop; 26. Handle; 27. Buckle; 3. One-way valve; 38. First concave fold crease; 79. Second concave fold crease; 70A. Third concave fold crease; 70B. Fourth concave fold crease; 40. First connecting strap; 42. Zipper assembly; 42A. First chain strap; 42B. Second chain strap; 80. Second connecting strap; 100. Anchoring part; 105. Backpack. Detailed Implementation

[0055] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to specific embodiments.

[0056] Example 1:

[0057] like Figure 1-8 As shown, this embodiment provides a three-dimensional compression bag 1, 4, including: a sealed cavity: formed by a top surface layer 51, 61, a bottom surface layer 52, 62, and a peripheral surface layer 53, or symmetrical side surface layers 63A, 63B, which are sealed together; wherein, as Figure 1 As shown, the peripheral layer 53 is arranged end-to-end around the top layer 51 and the bottom layer 52; as Figure 2 As shown, or the side layers 63A and 63B are symmetrically distributed on both sides of the top layer 61 and the bottom layer 62, with the top layer 61 extending to the bottom layer 62 and surrounding it.

[0058] Sealing assembly: includes an airtight zipper 2 disposed on the peripheral layer 53 or the top layer 61; and a one-way valve 3 disposed on the top layers 51 and 61;

[0059] The folding optimization structure includes a first concave fold 30 located at the geometric center point region of the peripheral layer 53, or a second concave fold 70 located at the symmetrical center point region of the side layers 63A and 63B, and a third concave fold 70A and a fourth concave fold 70B located at the edges of the side layers 63A and 63B and extending symmetrically along both sides of the second concave fold 70.

[0060] like Figure 1 As shown in Figure 2, since the peripheral layer 53 in this application is composed of a single piece of surface material joined end to end, when the sealing component is set on the peripheral layer 53, at least two airtight zippers 2 can be provided on both sides, making the opening of the empty compression bag larger and facilitating the user to take out and put in items; similarly, the top layer 61 extends to the bottom layer 62 and is connected around it, and the airtight zipper 2 provided on the top layer 61 can make the opening of the empty compression bag larger and facilitating the user to take out and put in items.

[0061] At the same time, such as Figure 1-4 As shown, concave fold lines are set on each surface layer, which enables the three-dimensional compression bag to fold along a preset path when folding, eliminating human operation or random errors, improving folding speed, and ensuring that the three-dimensional compression bag is flat and consistently recessed into the inner cavity of the suitcase.

[0062] Preferred, see Figure 5 The first concave fold 30, the second concave fold 70, the third concave fold 70A, and the fourth concave fold 70B are V-shaped, concave, or U-shaped indentations; the depth of the indentation is 10-50% of the thickness of the surface layer.

[0063] The aforementioned V-shaped, concave, or U-shaped indentations make folding easier and neater. The applicant's experiments revealed that if the indentation depth is too shallow (<10% of the surface layer thickness), the folding guidance effect is weak, and the contact area is insufficient; if the indentation depth is too deep (>50% of the surface layer thickness), the material is prone to breakage, and airtightness is compromised. Experiments show that 10-50% of the surface layer thickness represents a functional balance between strength and folding performance.

[0064] Preferred, see Figure 1-4It also includes a connection structure for fitting the three-dimensional compression bag with an external bag. The connection structure includes a first connecting strip 40 extending outward from the outer periphery of the sealed cavity, starting from a region 20 mm above and below the geometric center point of the peripheral layer 53; or a second connecting strip 80 extending outward from the outer periphery of the sealed cavity, starting from a region 20 mm above the fourth concave fold 70B.

[0065] The first connecting strap 40 and the second connecting strap 80 mentioned above can secure the three-dimensional compression bag and the bag used with it.

[0066] Preferably, the first connecting strip 40 originates from the geometric center point of the peripheral layer 53; the second connecting strip 80 originates from the fourth concave fold 70B. This folding method results in a more regular shape and a higher degree of fit.

[0067] Preferred, such as Figure 7 As shown, the airtight zipper 2 includes a zipper pull 21, two cover fastening portions 22A and 22B made of thermoplastic polyurethane elastomer or polyvinyl chloride located on both sides of the zipper pull 21, and zipper pull receiving portions 23 and zipper pull stop portions 24 located at both ends of the airtight zipper 2. A pull tab (not shown) is provided on the extension line of the zipper pull receiving portion 23, and a handle 25 is provided for pulling the zipper pull 21. This airtight zipper 2 provides better sealing and makes it easier to open and close the zipper.

[0068] Preferred, such as Figure 6 As shown, the first connecting strip 40 and the second connecting strip 80 are formed by connecting one side of a single strip to the surface layer to form an L-shape, or by forming two strips, wherein the inner side of the two strips abuts against the outer side of the raised area and is connected to the surface layer to form a T-shape.

[0069] Preferred, such as Figure 3 As shown, the top surface layer 51 and the upper surface layer 53A are recessed into the bottom surface layer 52 and the lower surface layer 53B for contact; the contact area between the top surface layer 51 and the upper surface layer 53A and the bottom surface layer 52 and the lower surface layer 53B is ≥80%.

[0070] Or, such as Figure 4 As shown, the top layer 61 and the upper side layers 63A1 and 63B1 are recessed into the bottom layer 62 and the lower side layers 63A2 and 63B2, and the contact area between the top layer 61 and the upper side layers 63A1 and 63B1 and the bottom layer 62 and the lower side layers 63A2 and 63B2 is ≥80%.

[0071] This allows for a better folding and fit.

[0072] Preferably, all the outer layers of the three-dimensional compression bag are composed of a fabric-plastic composite consisting of a textile layer and a polymer film layer. This allows the outer layers to have both strength and waterproof function.

[0073] Preferably, the textile layer is made of any one or more of nylon, polyester, acrylic, polypropylene, aramid, cotton and linen, non-woven fabric, and polyester-cotton-polyester blends.

[0074] Preferably, the polymer film layer is made of any one or more of polyurethane, polyvinyl chloride, polyolefin, polyamide, polyester, and silicone.

[0075] Preferably, the horizontal cross-sectional shape of the three-dimensional compression bag includes a rectangle, square, cylinder, triangle, or trapezoid. This allows the three-dimensional compression bag to be made into various shapes to suit bags of different shapes.

[0076] Example 2

[0077] This embodiment provides a method for manufacturing the above-mentioned three-dimensional compression bag, including the following steps:

[0078] 1. Material lamination steps: The textile layer and polymer film layer are coated with adhesive and laminated together, either by coating or by bonding, to form a fabric-plastic composite preform. The adhesive used is either a two-component polyurethane adhesive or a reactive polyurethane hot melt adhesive, with a coating amount of 20-30 g / m². 2 The composite temperature is 100-150℃, the pressure is 0.5-0.8MPa, and the composite speed is 5-10m / min. These conditions can be adjusted according to specific circumstances.

[0079] 2. Structural Forming Steps: The fabric-plastic composite blank is die-cut to form top layers 51 and 61, bottom layers 52 and 62, peripheral layers 53, and side layers 63A and 63B. High-frequency welding is then performed on corresponding positions to create concave folds 30, 70, 70A, and 70B. The molding of these concave folds 30, 70, 70A, and 70B uses V-shaped, concave, or U-shaped indentation tools, with the indentation depth being 10-50% of the total thickness of the fabric-plastic composite.

[0080] 3. Connecting strip assembly steps: Secure the roots of the first connecting strip 40 and the second connecting strip 80 at the corresponding positions using high-frequency welding; alternatively, ultrasonic welding or adhesive bonding can be used for fixing. High-frequency welding conditions are: frequency 27.12 MHz ± 5%, power 4-6 kW, and welding time 3-10 seconds.

[0081] 4. Component integration steps: Install the airtight zipper 2 in the corresponding position by high-frequency welding, and fix the one-way valve 3 to the top layer 51 and 61; weld the integrated peripheral layer 53 and / or bottom layer 62 at both ends; the high-frequency welding conditions are frequency 27.12M Hz±5%, power 5-10kW, and welding time 3-10s.

[0082] 5. Bag forming steps: The integrated top layer 51, bottom layer 52, and peripheral layer 53 are high-frequency welded using a copper or aluminum mold of the forming size; the integrated top layer 61, bottom layer 62, and peripheral layer 63 are folded inwards, and the other two edges are high-frequency welded using a copper or aluminum straight-line mold. The high-frequency welding conditions are: frequency 27.12 MHz ± 5%, power 5-10 kW, and welding time 3-10 seconds.

[0083] 6. Leak detection procedures, helium mass spectrometry leak detection: control the leakage rate ≤1×10 -6 Pa·m 3 / s, negative pressure test, test conditions are -20kPa maintained for 24h.

[0084] The three-dimensional compression bag produced by the above steps can ensure a sealing effect, while being easy to fold and having a larger zipper opening for easy access to items.

[0085] Example 3

[0086] like Figure 8-17 As shown, this embodiment provides a bag with the above-mentioned three-dimensional compression bag, including:

[0087] A storage slot is pre-reserved on the inner wall of the bag, which is used to store the three-dimensional compression bag after it is folded; an anchoring part 100 is provided around the inner wall of the bag, such as... Figure 8 As shown, the anchoring part 100 is detachably or fixedly connected to the corresponding first connecting strip 40; as Figure 9 As shown, or an anchoring part 100 is provided at the bottom of the bag, wherein the anchoring part 100 is detachably or fixedly connected to the corresponding second connecting strap 80.

[0088] like Figure 10 As shown in Figure 12, the three-dimensional compression bag is fixedly installed inside the bag, with its zipper located on three sides of the circumferential layer or the top layer, ensuring the opening is large enough. For example... Figure 11 , 13 As shown, the 3D compression bag, after being folded, fits neatly along the concave fold lines and can be stored in the storage slot without taking up space.

[0089] Preferably, the detachable connection includes: a zipper assembly 42 connection: such as Figure 14 As shown, the first chain strap 42A is sewn to the anchoring part 100, as... Figure 15As shown, the second chain band 42B is sewn to the end of the connecting band; the second chain band 42B

[0090] Alternatively, a snap-fit ​​assembly can be used for connection: the male snap-fit ​​is embedded in the anchoring part 100, and the female snap-fit ​​is fixed to the end of the connecting strip;

[0091] Alternatively, a hook and loop fastener assembly can be used: the hook side of the hook and loop fastener assembly is fixed to the anchoring part 100, and the loop side of the hook and loop fastener assembly is fixed to the end of the connecting strip; or a magnetic assembly can be used: the N-pole magnetic strip of the magnetic assembly is embedded in the anchoring part 100, and the S-pole magnetic strip of the magnetic assembly is fixed to the end of the connecting strip, with a magnetic attraction force ≥3N / cm. 2 .

[0092] The anchoring parts 100 are continuously or intermittently arranged around the inner wall of the bag. This allows the anchoring parts 100 to be connected and fixed to the three-dimensional compression bag according to actual needs.

[0093] Preferably, the anchoring part 100 is a webbing or a thermoplastic polyurethane injection-molded base, with a width of 1-3 cm and a tensile strength ≥500 N. This ensures that the anchoring part 100 is securely connected to the three-dimensional compression bag.

[0094] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A three-dimensional compression bag, characterized by, include: Sealed cavity: formed by a top layer (51, 61), a bottom layer (52, 62), and a peripheral layer (53), or symmetrical side layers (63A, 63B) enclosing and sealing the cavity; wherein, the peripheral layer (53) is arranged end to end around the top layer (51) and the bottom layer (52), and the peripheral layer (53) includes an upper peripheral layer (53A) and a lower peripheral layer (53B); or the side layers (63A, 63B) are symmetrically distributed on both sides of the top layer (61) and the bottom layer (62), the top layer (61) extends to the bottom layer (62) and surrounds it, and the side layers (63A, 63B) include an upper side layer (63A1, 63B1) and a lower side layer (63A2, 63B2). Sealing assembly: including an airtight zipper (2) disposed on the peripheral layer (53) or the top layer (61); and a one-way valve (3) disposed on the top layer (51, 61); The folding optimization structure includes a first concave fold line (30) located at the geometric center point region of the peripheral layer (53), or a second concave fold line (70) located at the symmetrical center point region of the side layers (63A, 63B), and a third concave fold line (70A) and a fourth concave fold line (70B) located at the edge of the side layers (63A, 63B) and extending symmetrically along both sides of the second concave fold line (70).

2. The three-dimensional compression sack of claim 1, wherein, The first concave fold line (30), the second concave fold line (70), the third concave fold line (70A), and the fourth concave fold line (70B) are V-shaped, concave, or U-shaped indentations; the depth of the indentation is 10-50% of the thickness of the surface layer.

3. The three-dimensional compression garment of claim 1, wherein, It also includes a connection structure for fitting the three-dimensional compression bag with an external bag. The connection structure includes a first connecting strip (40) extending outward from the outer periphery of the sealed cavity, starting from a region 20mm above and below the geometric center point of the peripheral layer (53); or a second connecting strip (80) extending outward from the outer periphery of the sealed cavity, starting from a region 20mm above the fourth concave fold (70B).

4. The three-dimensional compression bag according to claim 3, characterized in that, The first connecting strip (40) starts from the geometric center point of the peripheral layer (53); the second connecting strip (80) starts from the fourth concave fold (70B).

5. The three-dimensional compression bag according to claim 3, characterized in that, The first connecting strip (40) and the second connecting strip (80) are formed by connecting one side of a single strip to the surface layer in an L-shape, or by forming two strips, wherein the inner side of the two strips abuts against the outer side of the raised area and is connected to the surface layer in a T-shape.

6. The three-dimensional compression bag according to claim 1, characterized in that, The airtight zipper (2) includes a zipper head (21), a cover fastening part (22A, 22B) made of thermoplastic polyurethane elastomer or polyvinyl chloride located on both sides of the zipper head (21), and a zipper head receiving part (23) and a zipper head stop part (24) located at both ends of the airtight zipper (2). A pull buckle (29) is provided on the extension line of the zipper head receiving part (23) for pulling the handle (25) of the zipper head (21).

7. The three-dimensional compression bag according to claim 1, characterized in that, The top layer (51) and the upper surrounding layer (53A) are recessed into the bottom layer (52) and the lower surrounding layer (53B) for contact; the contact area between the top layer (51) and the upper surrounding layer (53A) and the bottom layer (52) and the lower surrounding layer (53B) is ≥80%; Alternatively, the top layer (61) and the upper side layer (63A1, 63B1) may be recessed into the bottom layer (62) and the lower side layer (63A2, 63B2) to contact each other, and the contact area between the top layer (61) and the upper side layer (63A1, 63B1) and the bottom layer (62) and the lower side layer (63A2, 63B2) may be ≥80%.

8. The three-dimensional compression bag according to claim 1, characterized in that, All surfaces of the three-dimensional compression bag are uniformly covered with plastic composite material.

9. The three-dimensional compression bag according to claim 1, characterized in that, The horizontal cross-sectional shape of the three-dimensional compression bag includes rectangle, square, cylinder, triangle or trapezoid.

10. A bag having a three-dimensional compression bag as described in any one of claims 1-9, characterized in that, include: The inner wall of the bag has a storage slot for storing the three-dimensional compression bag after it is folded. An anchoring part (100) disposed around the inner wall of the bag, the anchoring part (100) being detachably or fixedly connected to the first connecting strap (40) in the three-dimensional compression bag as described in claim 3; or an anchoring part (100) disposed at the bottom of the bag, the anchoring part (100) being detachably or fixedly connected to the second connecting strap (80) in the three-dimensional compression bag as described in claim 3.

11. The bag according to claim 10, characterized in that, The detachable connection includes: Zipper assembly (42) is connected, wherein a first chain tape (42A) is sewn to the anchoring part (100) and a second chain tape (42B) is sewn to the end of the connecting tape; Alternatively, a hook and loop fastener assembly can be used for connection, wherein the hook side of the hook and loop fastener assembly is fixed to the anchoring part (100), and the loop side of the hook and loop fastener assembly is fixed to the end of the connecting strip. Alternatively, a snap fastener assembly can be used for connection, wherein the male snap fastener of the snap fastener assembly is embedded in the anchoring part (100), and the female snap fastener of the snap fastener assembly is fixed to the end of the connecting strip; Alternatively, a magnetic attraction component can be connected, with the N-pole magnetic strip of the magnetic attraction component embedded in the anchoring part (100), and the S-pole magnetic strip of the magnetic attraction component fixed to the end of the connecting strip, and the magnetic attraction force ≥3N / cm². The anchoring part (100) is continuously or intermittently arranged around the inner wall of the bag.

12. The bag according to claim 10, characterized in that, The anchoring part (100) is a webbing or thermoplastic polyurethane injection molded base with a width of 1-3cm and a tensile strength ≥500N.

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