Degradable environment-friendly luggage case and preparation process thereof

Abstract

The invention relates to the field of luggage cases, in particular to a degradable environment-friendly luggage case which comprises a case body, case wheels are arranged on the case body, a stabilizing assembly is installed in the case body, a telescopic assembly is arranged on the stabilizing assembly, a locking assembly is connected to a holding assembly, and when the holding assembly is pressed, the telescopic assembly is arranged on the telescopic assembly. The locking assembly contracts and is separated from the stabilizing assembly; and the holding assembly is loosened, and the locking assembly enters the stabilizing assembly to achieve locking. A core component telescopic rod is made of a composite degradable material of polylactic acid, linen fiber and polyadipic acid, the tensile strength of the telescopic rod meets the use requirement through linen fiber alkali treatment modification and addition of a compatibilizer, the mechanical property meets the daily use requirement, and meanwhile complete degradability is achieved; when the luggage case is abandoned or parts are damaged, the telescopic rod can be easily disassembled through the pre-disassembling groove, and the luggage case can be gradually degraded in the natural environment in cooperation with the characteristics of degradable materials.

Description

Technical Field

[0001] This invention relates to the field of biodegradable and environmentally friendly suitcases and their manufacturing process. Background Technology

[0002] With increasing environmental awareness, the environmental performance of suitcases, as a common travel item, is receiving growing attention. Existing suitcases suffer from two main problems: First, their structure is easily damaged and difficult to repair, especially the pull rod. Frequent use often results in the pull rod failing to extend or retract properly due to excessive rigidity of the internal mechanism or damage to the locking mechanism. Traditional pull rods are mostly made of alloy, making them difficult to disassemble and repair after damage, requiring complete replacement and wasting resources. Second, they lack environmental friendliness. The main body of suitcases often uses petroleum-based polymers such as ABS, PC, and PP, which are difficult to degrade naturally after disposal, easily contributing to "white pollution."

[0003] Although some manufacturers have launched so-called "eco-friendly suitcases," they only use biodegradable materials in certain areas (such as polylactic acid shells). Key components such as wheels, handles, and connectors are still made of alloys or non-biodegradable plastics, failing to achieve full life-cycle environmental friendliness. Furthermore, purely biodegradable materials (such as polylactic acid and polyadipate) have shortcomings in mechanical properties, exhibiting low compressive strength and poor wear resistance, making it difficult to meet the load-bearing and impact-resistant requirements of suitcases. This is especially true for handles, which need to withstand frequent tensile and load-bearing forces. Traditional biodegradable materials cannot meet these strength requirements, thus leading to a long-term reliance on alloy materials. However, alloy materials degrade extremely slowly, causing long-term environmental pollution after disposal.

[0004] To address the aforementioned issues, there is an urgent need to develop a suitcase that combines excellent structural stability, ease of maintenance, and environmental friendliness throughout its entire lifecycle. This requires not only optimizing the structure to prevent the pull rod from becoming easily damaged, but also using biodegradable materials to replace traditional non-biodegradable materials. In particular, it is essential to improve the mechanical properties of biodegradable materials used in the pull rod to ensure that they meet usage requirements, while simultaneously achieving the goal of easy degradation and no pollution after damage. Summary of the Invention

[0005] To address the problems in the prior art, this invention provides a biodegradable and environmentally friendly suitcase and its manufacturing process.

[0006] The technical solution adopted by this invention to solve its technical problem is: a biodegradable and environmentally friendly suitcase, including a suitcase body, suitcase wheels provided on the suitcase body, a stabilizing component installed inside the suitcase body, a telescopic component provided on the stabilizing component, a grip component provided on the telescopic component, the telescopic component being able to extend and retract to adjust the extension position of the grip component; a locking component provided on the stabilizing component, the locking component being used to lock the relative position of the stabilizing component and the telescopic component, the locking component being connected to the grip component, when the grip component is pressed, the locking component retracts and separates from the stabilizing component; when the grip component is released, the locking component enters the interior of the stabilizing component to achieve locking.

[0007] Preferably, the stabilizing component includes a fixing rod fixed to the housing, the fixing rod having two sets of locking holes, each set having at least two locking holes; the fixing rod has a rope groove inside.

[0008] Preferably, the telescopic assembly includes a telescopic rod disposed on a fixed rod, and the telescopic rod has a pre-disassembly groove. When degradation is required, the telescopic rod is extended along the pre-disassembly groove by pulling the gripping assembly.

[0009] Preferably, the grip assembly includes an adjustment unit and a disassembly unit. The adjustment unit is used to adjust the locking state of the locking assembly, and the disassembly unit is used to disassemble the telescopic rod. The adjustment unit includes a handle disposed on the telescopic rod. The handle has an inner cavity with a limiting groove. A pressing block is disposed inside the limiting groove, which restricts the downward movement of the pressing block. A first elastic element is disposed below the pressing block, which pushes the pressing block to reset. The first elastic element is disposed inside the inner cavity. Both sides of the pressing block are connected to the locking assembly. When the pressing block moves downward, it pulls the locking assembly to the unlocked state.

[0010] Preferably, the disassembly unit includes a storage groove inside the pressing block, a plastic part is provided inside the storage groove, a sealing plate is connected to the plastic part, the sealing plate seals the storage groove, a flexible strip is provided inside the storage groove, the flexible strip is located below the sealing plate; and outwardly protruding limiting blocks are provided on both sides of the pressing block, the limiting blocks are used to limit the upward movement of the pressing block, and the limiting blocks are made of flexible material.

[0011] Preferably, the locking assembly includes steel wire ropes connected to both sides of the pressing block, the ends of the steel wire ropes being connected to the locking bead, and the locking bead being able to slide inside the locking hole; the telescopic rod has a through groove, and a second elastic element is provided inside the through groove, the ends of the steel wire ropes passing through the inside of the second elastic element and fixed to the locking bead, when the through groove is aligned with the locking hole, the locking bead enters the inside of the locking hole under the action of the second elastic element to achieve locking.

[0012] Preferably, the locking assembly further includes a tensioning rod and a guide rod disposed inside the grip, the guide rod being located above the tensioning rod, the wire rope passing through the underside of the tensioning rod and the topside of the guide rod, and the end of the through groove being rounded to allow the wire rope to slide smoothly at the end of the through groove.

[0013] A manufacturing process for a biodegradable and environmentally friendly suitcase includes the following steps: Step 1: Prepare the telescopic rod. First, dry polylactic acid and polyadipate in a vacuum drying oven at 80-100℃ for 2-4 hours until the moisture content is ≤0.1%. Soak flax fiber in 5%-10% NaOH solution at 60-80℃ for 1-2 hours, wash with water until neutral, and then dry at 105℃ for 4 hours. Add the dried polylactic acid, polyadipate, flax fiber, compatibilizer, and antioxidant 1010 to a high-speed mixer according to the ratio, mix at a speed of 700-1100r / min for 12-20 minutes, and then send it to a pultrusion molding machine. Extrude the material under the conditions of mold temperature 165-190℃ and traction speed 0.5-1.5m / min to obtain the telescopic rod profile. After cutting according to the design dimensions, grind off the burrs and open the pre-scraping groove on the telescopic rod. Step 1: Prepare the telescopic rod. First, dry the polylactic acid and polyadipate; soak the flax fiber in an alkaline solution, wash it with water until neutral, and then dry it; then add the dried polylactic acid, polyadipate, flax fiber, compatibilizer, and antioxidant into the high-speed mixer according to the ratio, mix them, and then send them into the pultrusion molding machine to form the telescopic rod profile. After cutting it according to the design dimensions, grind off the burrs and open the pre-splitting groove on the telescopic rod. Step 2: Assemble the stabilizing components and securely install the fixing rod inside the housing; Step 3: Assemble the gripping components, place the first elastic element into the inner cavity, and then install the pressing block so that the pressing block can slide in the limiting groove; a storage groove is opened inside the pressing block, and the two ends of the flexible strip are fixedly connected to the pressing block by screws; Step 4: Assemble the locking assembly. The telescopic rod has a through groove. Insert the second elastic element, connect one end of the steel wire rope to the pressing block, and connect the other end through the second elastic element to the locking bead. The handle has a tension rod and a guide rod integrally formed, so that the steel wire rope passes through the tension rod below and the guide rod above. Step 5: Assemble the entire suitcase. Connect the telescopic rod to the fixed rod and install them together so that the locking mechanism's locking pins can engage with the locking holes on the fixed rod, thus completing the assembly of the biodegradable and environmentally friendly suitcase.

[0014] Preferably, the mixing time of the high-speed mixer in step one is 15 min, the mold temperature of the pultrusion molding machine is 180℃, and the traction speed is 1 m / min; the clearance between the pressing block and the limiting groove in step three is 0.1-0.2 mm to ensure smooth sliding of the pressing block.

[0015] Beneficial effects: Through the coordinated design of the stabilizing component, telescopic component, grip component, and locking component, smooth extension and reliable locking of the pull rod are achieved. Pressing the pressing block of the grip component unlocks the locking component, pulling the handle adjusts the extension position of the pull rod, and releasing the pressing block automatically locks the locking component under the action of the elastic element, making operation convenient. The guide rod and tensioning rod ensure smooth sliding of the wire rope and avoid wear. The arc-shaped design at the end of the through groove further reduces wire rope friction, extends the service life of the locking component, and solves the problems of easy damage and poor extension and retraction of traditional pull rods.

[0016] The core component, the telescopic rod, is made of a composite biodegradable material composed of polylactic acid, flax fiber, and polyadipate. Through alkali treatment modification of the flax fiber and the addition of compatibilizers, the telescopic rod's tensile strength meets usage requirements, its mechanical properties meet daily use needs, and it is completely biodegradable. When the suitcase is discarded or the part is damaged, the telescopic rod can be easily disassembled through the pre-disassembly slot. Combined with the biodegradable material properties, it can gradually degrade in the natural environment.

[0017] The gripping component features a disassembly unit. After pressing the sealing plate to break it from the plastic part, pulling the flexible belt causes the pressing block to detach from the limiting groove, which in turn pulls the steel wire rope to deform and unfold the telescopic rod, facilitating subsequent degradation. The steel wire rope, first elastic element, and second elastic element in the locking component can be recycled separately, reducing resource waste. The telescopic rod is manufactured using a pultrusion molding process, combined with raw material pretreatment and precise parameter control, ensuring uniform material mixing and stable mechanical properties. The assembly steps for each component are clear, requiring no complex specialized equipment, facilitating industrial mass production, balancing environmental performance and production efficiency, and possessing promising market application prospects. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 for Figure 2 Enlarged structural diagram at point A in the diagram; Figure 4 A schematic diagram showing the connection between the stabilizing component, the telescopic component, and the gripping component; Figure 5 for Figure 4 Enlarged structural diagram at point B in the diagram; Figure 6 for Figure 4 Enlarged structural diagram at point C; Figure 7 This is a schematic diagram of the structure of the gripping component of the present invention; Figure 8 This is a schematic diagram of the flexible strip structure.

[0020] In the diagram: 1. Box body; 11. Box wheel; 12. Mounting hole; 2. Stabilizing component; 21. Fixing rod; 22. Locking hole; 23. Rope groove; 3. Telescopic component; 31. Telescopic rod; 32. Pre-disassembly groove; 4. Grip component; 41. Grip; 42. Inner cavity; 43. Limiting groove; 44. Pressing block; 45. Storage groove; 46. Sealing plate; 47. Flexible belt; 48. Limiting block; 49. First elastic element; 410. Plastic element; 5. Locking component; 51. Steel wire rope; 52. Guide rod; 53. Tensioning rod; 54. Clearance groove; 55. Second elastic element; 56. Locking bead; 57. Through groove. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] In one embodiment, please refer to the appendix to the specification. Figure 1-8 As shown, the biodegradable and environmentally friendly suitcase of the present invention includes a suitcase body 1, with wheels 11 mounted on the suitcase body 1. A stabilizing component 2 is installed inside the suitcase body 1, a telescopic component 3 is mounted on the stabilizing component 2, and a grip component 4 is mounted on the telescopic component 3. The telescopic component 3 can extend and retract to adjust the extension position of the grip component 4. A locking component 5 is mounted on the stabilizing component 2 to lock the relative position of the stabilizing component 2 and the telescopic component 3. The locking component 5 is connected to the grip component 4. When the grip component 4 is pressed, the locking component 5 retracts and separates from the stabilizing component 2. When the grip component 4 is released, the locking component 5 enters the interior of the stabilizing component 2 to achieve locking.

[0023] The stabilizing component 2 includes a fixing rod 21 fixed to the housing 1. The fixing rod 21 has two sets of locking holes 22, with at least two locking holes in each set. The fixing rod 21 has a rope groove 23 inside, which provides space for the steel wire rope 51 to move and avoids excessive friction between the steel wire rope 51 and the inner wall of the fixing rod 21.

[0024] The telescopic assembly 3 includes a telescopic rod 31 mounted on the fixed rod 21. A pre-disassembly groove 32 is provided on the telescopic rod 31, offering a weak point for disassembly. When degradation is required, the lever 4 is pulled to allow the locking bead 56 to slide inside the telescopic rod 31, causing the telescopic rod 31 to unfold along the pre-disassembly groove 32, facilitating subsequent degradation. The materials used to prepare the telescopic rod 31, by weight, are: 60 parts polylactic acid, 15 parts alkali-treated flax fiber with a length of 1.5 mm, 12 parts polyadipate, 3 parts compatibilizer (MAH-g-PLA), and 0.6 parts antioxidant. Its tensile strength is 48 MPa, and its flexural strength is 62 MPa, meeting the mechanical requirements for daily use.

[0025] The grip assembly 4 includes an adjustment unit and a disassembly unit. The adjustment unit is used to adjust the locking state of the locking assembly 5, and the disassembly unit is used to disassemble the telescopic rod 31. The adjustment unit includes a handle 41 mounted on the telescopic rod 31. The handle 41 has an inner cavity 42, and a limit groove 43 is provided on the inner cavity 42. A pressing block 44 is provided inside the limit groove 43. The limit groove 43 is used to limit the downward movement of the pressing block 44 to prevent the pressing block 44 from moving too far downward and damaging the locking assembly 5. A first elastic element 49, which is a spring, is provided below the pressing block 44 to push the pressing block 44 to reset. The first elastic element 49 is located inside the inner cavity 42. The two sides of the pressing block 44 are connected to the locking assembly 5. When the pressing block 44 moves downward, it pulls the locking assembly 5 to the unlocked state.

[0026] The disassembly unit includes a storage groove 45 inside the pressing block 44. A plastic part 410 is provided inside the storage groove 45. The plastic part 410 is made of easily breakable plastic. The end of the plastic part 410 is connected to a sealing plate 46. The sealing plate 46 seals the storage groove 45 and protects the flexible band 47. The flexible band 47 is made of nylon and is easy to pull the pressing block 44. The flexible band 47 is located below the sealing plate 46. When the pressing block 44 is pressed down, the flexible band 47 is not affected. There are outwardly protruding limiting blocks 48 on both sides of the pressing block 44. The limiting blocks 48 are made of plastic and are used to limit the upward movement of the pressing block 44. During normal use, they prevent the pressing block 44 from disengaging from the limiting groove 43 under the action of the first elastic member 49.

[0027] The locking assembly 5 includes steel wire ropes 51 connected to both sides of the pressing block 44. The steel wire ropes 51 have high strength and are not easily broken. The ends of the steel wire ropes 51 are connected to the locking bead 56. The locking bead 56 has a cylindrical structure and can slide inside the locking hole 22. The telescopic rod 31 has a through groove 57. A second elastic element 55 is provided inside the through groove 57. The second elastic element 55 is a spring. The ends of the steel wire ropes 51 pass through the inside of the second elastic element 55 and are fixed to the locking bead 56. When the through groove 57 is aligned with the locking hole 22, the locking bead 56 enters the inside of the locking hole 22 under the elastic force of the second elastic element 55 to achieve locking.

[0028] The locking assembly 5 also includes a tensioning rod 53 and a guide rod 52 disposed inside the handle 41. The guide rod 52 is located above the tensioning rod 53. The wire rope 51 passes through the tensioning rod 53 from below and the guide rod 52 from above. Through the cooperation of the tensioning rod 53 and the guide rod 52, the wire rope 51 is ensured to be taut and its movement direction is stable. The end of the through groove 57 is set to be arc-shaped to prevent the wire rope 51 from being scratched by the end of the through groove 57 during movement, allowing the wire rope 51 to slide smoothly at the end of the through groove 57.

[0029] Existing suitcases frequently experience handle damage during use, often due to excessive rigidity of the internal handle mechanism or damage to the locking mechanism, preventing the handle from extending or retracting properly. Furthermore, traditional handles are mostly made of alloy, making them difficult to repair and requiring complete replacement, resulting in resource waste. Simultaneously, the main body of suitcases is often made of petroleum-based polymers such as ABS, PC, and PP, which are difficult to degrade naturally after disposal. Some eco-friendly suitcases only use biodegradable materials in certain areas, leaving key components like the handle still made of non-biodegradable alloys, failing to achieve full life-cycle environmental friendliness. In addition, purely biodegradable materials lack sufficient mechanical properties, exhibiting poor pressure resistance and abrasion resistance, making it difficult to meet the demands of suitcase use, especially the handle which needs to withstand frequent stretching and loads. Traditional biodegradable materials cannot meet these standards, limiting the development of eco-friendly suitcases.

[0030] The manufacturing process of this biodegradable and environmentally friendly suitcase includes the following steps: Step 1: Prepare telescopic rod 31. First, dry polylactic acid and polyadipate in a vacuum drying oven at 90℃ for 3 hours until the moisture content is ≤0.1%. Soak flax fiber in 8% NaOH solution at 70℃ for 1.5 hours, wash with water until neutral, and then dry at 105℃ for 4 hours. Add 60 parts of dried polylactic acid, 12 parts of polyadipate, 15 parts of flax fiber, 3 parts of compatibilizer (MAH-g-PLA), and 10100.6 parts of antioxidant to a high-speed mixer and mix at 900r / min for 15 minutes. Then feed it into a pultrusion molding machine and extrude it under the conditions of mold temperature 180℃ and traction speed 1m / min to obtain telescopic rod 31 profile. After cutting according to the design size, grind the burrs and open the pre-splitting groove 32 on the telescopic rod 31. Step 2: Assemble the stabilizing component 2. Fix the fixing rod 21 inside the box 1 with bolts. Make two sets of three locking holes 22 and one rope groove 23 on the fixing rod 21. Step 3: Assemble the grip assembly 4. An inner cavity 42 and a limiting groove 43 are formed inside the grip 41. The first elastic element 49 is placed into the inner cavity 42, and then the pressing block 44 is installed, ensuring a 0.15mm clearance between the pressing block 44 and the limiting groove 43 to guarantee smooth sliding of the pressing block 44. A storage groove 45 is formed inside the pressing block 44, and a flexible strip 47 is inserted. A sealing plate 46 is connected via a plastic element 410 to seal the storage groove 45. Limiting blocks 48 are integrally formed on both sides of the pressing block 44. During installation, the pressing block 44 is squeezed, causing the limiting blocks 48 to be squeezed into the limiting groove 43. The limiting blocks 48 will not detach from the limiting groove 43 during normal use.

[0031] Step 4: Assemble the locking assembly 5. Open a slot 57 on the telescopic rod 31, insert the second elastic element 55, weld one end of the wire rope 51 to the pressing block 44, and weld the other end through the second elastic element 55 to the locking bead 56. The tension rod 53 and guide rod 52 are integrally formed inside the handle 41, so that the wire rope 51 passes through the tension rod 53 below and the guide rod 52 above, which allows the wire rope 51 to slide smoothly.

[0032] Step 5: Assemble the whole thing. Connect the telescopic rod 31 to the fixed rod 21 and install them together so that the locking lug 56 in the locking assembly 5 can engage with the locking hole 22 on the fixed rod 21 to complete the assembly of the biodegradable and environmentally friendly suitcase.

[0033] In use, press the pressing block 44 downwards with your finger. The downward movement of the pressing block 44 causes the steel wire ropes 51 located on both sides to move downwards. The steel wire ropes 51 slide around the surface of the guide rod 52. Under the tensioning action of the tensioning rod 53, the movement of the steel wire ropes 51 is smooth, avoiding severe wear. When the steel wire ropes 51 move, they pull the locking bead 56 to move, causing the locking bead 56 to disengage from the inside of the locking hole 22, and the telescopic rod 31 to separate from the fixed rod 21. Keep pressing the pressing block 44, grip the handle 41 tightly and pull upwards. The handle 41 drives the telescopic rod 31 to move, and the locking bead 56 slides along the inner wall of the fixed rod 21. When the locking bead 56 slides to a position that is aligned with the target locking hole 22, under the elastic force of the second elastic element 55, the locking bead 56 re-enters the inside of the locking hole 22, achieving locking and positioning, and completing the extension adjustment of the pull rod. When the housing 1 or the pull rod is damaged and needs to be degraded, press the sealing plate 46 downwards with your fingers or tools. The plastic parts 410 at both ends of the sealing plate 46 will break, and the sealing plate 46 will be flipped open. Insert your fingers into the storage groove 45 and pull the flexible band 47 upwards. The flexible band 47 will drive the pressing block 44 to move upwards. The limiting blocks 48 on both sides of the pressing block 44 will be squeezed and deformed, causing the pressing block 44 to detach from the limiting groove 43. Pull the pressing block 44 to drive the steel wire rope 51 to move. The steel wire rope 51 will pull the locking bead 56. Since the diameter of the locking bead 56 is larger than the diameter of the steel wire rope 51, the telescopic rod 31 will deform and unfold along the pre-disassembly groove 32 during the pulling process, which will facilitate subsequent degradation treatment. The steel wire rope 51, the first elastic element 49 and the second elastic element 55 can be recycled separately to reduce resource waste.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A biodegradable and environmentally friendly suitcase includes a suitcase body (1), wherein the suitcase body (1) is provided with wheels (11), characterized in that, The housing (1) is equipped with a stabilizing component (2), a telescopic component (3) is provided on the stabilizing component (2), and a gripping component (4) is provided on the telescopic component (3). The telescopic component (3) can extend and retract to adjust the extension position of the gripping component (4). The stabilizing component (2) is equipped with a locking component (5). The locking component (5) is used to lock the relative position of the stabilizing component (2) and the telescopic component (3). The locking component (5) is connected to the gripping component (4). When the gripping component (4) is pressed, the locking component (5) retracts and separates from the stabilizing component (2). When the gripping component (4) is released, the locking component (5) enters the interior of the stabilizing component (2) to achieve locking.

2. The biodegradable and environmentally friendly suitcase according to claim 1, characterized in that, The stabilizing component (2) includes a fixing rod (21) fixed on the housing (1), and the fixing rod (21) has two sets of locking holes (22), with at least two locking holes in each set; the fixing rod (21) has a rope groove (23) inside.

3. The biodegradable and environmentally friendly suitcase according to claim 2, characterized in that, The telescopic assembly (3) includes a telescopic rod (31) set on a fixed rod (21). The telescopic rod (31) has a pre-disassembly groove (32). When degradation is required, the telescopic rod (31) is unfolded along the pre-disassembly groove (32) by pulling the grip assembly (4).

4. A biodegradable and environmentally friendly suitcase according to claim 3, characterized in that, The grip assembly (4) includes an adjustment unit and a disassembly unit. The adjustment unit is used to adjust the locking state of the locking assembly (5), and the disassembly unit is used to disassemble the telescopic rod (31). The adjustment unit includes a handle (41) disposed on the telescopic rod (31). The handle (41) has an inner cavity (42) inside. The inner cavity (42) has a limiting groove (43) on it. A pressing block (44) is disposed inside the limiting groove (43). The limiting groove (43) is used to limit the downward movement of the pressing block (44). A first elastic element (49) is disposed below the pressing block (44). The first elastic element (49) is used to push the pressing block (44) to reset. The first elastic element (49) is disposed inside the inner cavity (42). The two sides of the pressing block (44) are connected to the locking assembly (5). When the pressing block (44) moves downward, it pulls the locking assembly (5) to the unlocked state.

5. A biodegradable and environmentally friendly suitcase according to claim 4, characterized in that, The disassembly unit includes a storage groove (45) inside the pressing block (44), a plastic part (410) is provided inside the storage groove (45), a sealing plate (46) is connected to the plastic part (410), the sealing plate (46) seals the storage groove (45), a flexible strip (47) is provided inside the storage groove (45), the flexible strip (47) is located below the sealing plate (46); the pressing block (44) has outwardly protruding limiting blocks (48) on both sides, the limiting blocks (48) are used to limit the upward movement of the pressing block (44), and the limiting blocks (48) are made of flexible material.

6. A biodegradable and environmentally friendly suitcase according to claim 5, characterized in that, The locking assembly (5) includes steel wire ropes (51) connected to both sides of the pressing block (44). The ends of the steel wire ropes (51) are connected to the locking bead (56), which can slide inside the locking hole (22). The telescopic rod (31) has a through groove (57), and a second elastic element (55) is provided inside the through groove (57). The ends of the steel wire ropes (51) pass through the inside of the second elastic element (55) and are fixed to the locking bead (56). When the through groove (57) is aligned with the locking hole (22), the locking bead (56) enters the inside of the locking hole (22) under the action of the second elastic element (55) to achieve locking.

7. A biodegradable and environmentally friendly suitcase according to claim 6, characterized in that, The locking assembly (5) also includes a tension rod (53) and a guide rod (52) disposed inside the handle (41). The guide rod (52) is located above the tension rod (53). The wire rope (51) passes under the tension rod (53) and over the guide rod (52). The end of the through groove (57) is set to be arc-shaped to allow the wire rope (51) to slide smoothly at the end of the through groove (57).

8. The manufacturing process of a biodegradable and environmentally friendly suitcase according to claim 7, characterized in that, Includes the following steps: Step 1: Prepare the telescopic rod (31). First, dry polylactic acid and polyadipate; soak flax fiber in an alkaline solution, wash it with water until neutral, and then dry it; then add the dried polylactic acid, polyadipate, flax fiber, compatibilizer, and antioxidant into the high-speed mixer according to the ratio, mix them, and then send them into the pultrusion molding machine to form the telescopic rod (31) profile. After cutting it according to the design size, grind the burrs and open the pre-splitting groove (32) on the telescopic rod (31). Step 2: Assemble the stabilizing component (2) and fix the fixing rod (21) inside the box (1); Step 3: Assemble the gripping component (4), put the first elastic element (49) into the inner cavity (42), and then install the pressing block (44) so ​​that the pressing block (44) can slide in the limiting groove (43); the pressing block (44) has a storage groove (45) inside, and the two ends of the flexible strip (47) are fixedly connected to the pressing block (44) by screws; Step 4: Assemble the locking assembly (5). A through groove (57) is provided on the telescopic rod (31). The second elastic element (55) is inserted. One end of the wire rope (51) is connected to the pressing block (44), and the other end passes through the second elastic element (55) and is connected to the locking bead (56). The handle (41) is integrally formed with a tensioning rod (53) and a guide rod (52), so that the wire rope (51) passes through from below the tensioning rod (53) and above the guide rod (52). Step 5: Assemble the whole assembly. Connect the telescopic rod (31) and the fixed rod (21) so that the locking lug (56) in the locking assembly (5) can engage with the locking hole (22) on the fixed rod (21) to complete the assembly of the biodegradable and environmentally friendly suitcase.

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