A multi-layer composite mailer

Abstract

The utility model relates to the packaging technical field discloses a kind of multi-layer composite mail bag, including mail bag, the top of mail bag is equipped with moisture-proof mechanism, the inner wall of mail bag is equipped with dismounting mechanism, the inner wall of mail bag is fixedly connected with waterproof interlayer, the inner wall of waterproof interlayer is fixedly connected with protective inner layer, the top of mail bag is fixedly connected with two straps, the dismounting mechanism includes joint board one, control assembly is installed in the inner wall of dismounting mechanism, the sliding connection of joint board one is limited to link, the outer wall of link is fixedly connected with fixed ring, the outer wall of fixed ring is fixedly connected with return spring, the inner wall of mail bag is fixedly connected with joint board two.In the utility model, by increasing detachable assembly, so that cloth strip and zipper can be disassembled from the inner wall of mail bag outer layer, it is convenient for subsequent maintenance and replacement to damaged zipper, to prevent the inconvenience caused by mail bag zipper when damaging.

Description

Technical Field

[0001] This utility model relates to the field of packaging technology, and in particular to a multi-layer composite mailbag. Background Technology

[0002] Traditional mailbags played a vital role in mail transportation in the past, and were mostly made of single-layer plastic or ordinary cloth. They relied primarily on the simple wrapping properties of the materials themselves to store mail. This manufacturing method gave traditional mailbags significant advantages: relatively low cost, simple processing, and rapid production. Although seemingly ordinary, they effectively met the most basic transportation needs of mail, facilitating its flow for a certain period.

[0003] Multi-layer composite mailbags provide reliable protection for mailed items. Their multi-layered structure gives them excellent puncture and tear resistance, effectively protecting them from impacts and friction during transport. They also prevent dust and contamination, keeping items clean. Furthermore, they offer some protection against theft and prying, safeguarding the safety and privacy of items and ensuring they arrive at their destination intact.

[0004] In existing technologies, some multi-layer composite mailbags are prone to zipper damage under high-intensity use, making the mailbag unable to open and close properly, affecting the loading and unloading of mail, reducing work efficiency, and the seal of the mailbag is compromised after the zipper is damaged, making the mail susceptible to external factors such as dust and rain, resulting in soiling. Therefore, a multi-layer composite mailbag is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a multi-layer composite mailbag, which aims to improve the problem that the zippers of some existing multi-layer composite mailbags are prone to damage under high-intensity use.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A multi-layer composite mailbag includes a mailbag, a moisture-proof mechanism installed on the top of the mailbag, a disassembly mechanism installed on the inner wall of the mailbag, a waterproof interlayer fixedly connected to the inner wall of the mailbag, a protective inner layer fixedly connected to the inner wall of the waterproof interlayer, and two carrying straps fixedly connected to the top of the mailbag.

[0008] The disassembly mechanism includes a first composite plate, a control component installed on the inner wall of the disassembly mechanism, a limit rod slidably connected to the first composite plate, a fixing ring fixedly connected to the outer wall of the limit rod, a return spring fixedly connected to the outer wall of the fixing ring, a second composite plate fixedly connected to the inner wall of the mailbag, and a cloth strip detachably connected to the bottom.

[0009] Through the above technical solution: Plywood 1 and Plywood 2 cooperate to form the connection base for the fabric strip. The limiting rod is slidably connected to Plywood 1 and can be moved by the operation of the control component when needed. The fixing ring is used to fix the return spring. When the limiting rod is subjected to external force, the return spring will be compressed or extended. When the zipper is damaged and needs to be disassembled, the control component can make the limiting rod pop out of the inner wall of Plywood 2, so that there is no limiting rod to fix Plywood 2 and Plywood 1. The flexibility of the outer layer of the mailbag is used to separate Plywood 1 and Plywood 2, release the locking post, and realize the disassembly of the fabric strip and zipper from the inner wall of the outer layer of the mailbag, which is convenient for replacement and maintenance.

[0010] As a further description of the above technical solution:

[0011] The moisture-proof mechanism includes a waterproof curtain, the top of which is fixedly connected to the top of the mailbag, one end of which is fixedly connected to a tear strip, the bottom of which is fixedly connected to a Velcro closure, and the top of the mailbag is fixedly connected to a raw edge.

[0012] The above technical solution involves fixing the top of the waterproof curtain to the top of the mailbag, forming a movable covering structure. The tear strip allows for quick tearing of the waterproof curtain when the zipper needs to be used, preventing it from obstructing the zipper. The Velcro and raw edge work together to seal the gap between the waterproof curtain and the outer layer of the mailbag when the waterproof curtain covers the zipper, firmly covering the zipper and providing moisture protection, preventing water from entering the inside of the mailbag through the zipper.

[0013] As a further description of the above technical solution:

[0014] The control component includes a pressing rod, the outer wall of which is slidably connected to the inner wall of the second composite plate, the bottom of which is rotatably connected to a limiting plate, and rotating columns are rotatably connected to both sides of the inner wall of the second composite plate, with the outer walls of the two rotating columns rotatably connected to the inner wall of the limiting plate.

[0015] Through the above technical solution: the pressing rod can slide on the inner wall of the second composite plate. When the pressing rod is pressed, the downward pressure of the pressing rod causes one end of the limiting plate to rotate downward. Since the middle two sides of the limiting plate are fixed by rotating columns, according to the lever principle, the descent of one end of the limiting plate will cause the other end of the limiting plate to rise, so that the limiting plate will no longer be stuck in the inner wall of the limiting groove opened on the inner wall of the limiting rod, thereby realizing the control of the limiting rod. Under the action of the return spring, the limiting rod pops out of the inner wall of the second composite plate, completing the operation of the disassembly mechanism.

[0016] As a further description of the above technical solution:

[0017] The bottom of the Velcro is detachably connected to the top of the rough edge, and the inner wall of the mailbag is detachably connected to a zipper.

[0018] The above technical solution allows for the detachable connection of Velcro and raw edges, making it easy to open the waterproof curtain and expose the zipper when needed. The zipper on the inner wall of the mailbag is detachable, and when the zipper is damaged, it can be removed and replaced or repaired through the disassembly mechanism. Under normal use, the zipper allows the mailbag to be opened and closed, facilitating the storage and retrieval of items.

[0019] As a further description of the above technical solution:

[0020] A torsion spring is fixedly connected to the outer wall of the limiting plate, and the other end of the torsion spring is rotatably connected to the inner wall of the second composite plate.

[0021] Through the above technical solution: the presence of the torsion spring allows the limiting plate to remain in its initial position when no external force is applied. When the pressing rod drives the limiting plate to rotate, and the pressing rod is no longer pressed after the operation is completed, the torsion spring will reset the limiting plate and re-lock it into the limiting groove on the inner wall of the limiting rod, thereby fixing the limiting rod and keeping the disassembly mechanism in a stable state when not in use.

[0022] As a further description of the above technical solution:

[0023] The outer wall of the limiting rod is provided with a limiting groove, and the outer wall of the limiting plate is slidably connected to the inner wall of the limiting groove;

[0024] Through the above technical solution: the limiting groove provides a sliding track for the limiting plate. When the limiting plate rotates, its outer wall slides on the inner wall of the limiting groove. Through the cooperation between the limiting plate and the limiting groove, the limiting rod is limited and released. When the limiting plate is stuck on the inner wall of the limiting groove, the limiting rod is fixed. When the limiting plate leaves the inner wall of the limiting groove, the limiting rod can pop out under the action of the return spring, completing the disassembly operation.

[0025] As a further description of the above technical solution:

[0026] The top of the cloth strip is fixedly connected to a locking post, the outer wall of the locking post is detachably connected to the inner wall of the second composite plate, the outer wall of the locking post is detachably connected to the inner wall of the first composite plate, and the other end of the return spring is fixedly connected to the inner wall of the first composite plate.

[0027] Through the above technical solution: the fabric strip is connected to the first and second composite plates via a locking post. The locking post is detachably connected to the inner walls of the first and second composite plates. When the limiting rod pops out of the inner wall of the second composite plate, there is no limiting rod to fix the first and second composite plates. The flexibility of the outer layer of the mailbag is used to separate the first and second composite plates, thereby releasing the locking post and realizing the disassembly of the fabric strip. The return spring is connected between the fixing ring and the first composite plate. When the limiting rod is not restricted by the limiting plate, the return spring releases elastic potential energy, pushing the limiting rod to pop out, providing power for the disassembly operation.

[0028] As a further description of the above technical solution:

[0029] The outer layer of the mailbag is made of high-density Oxford cloth, the waterproof interlayer is made of hot melt adhesive film, and the protective inner layer is made of non-woven fabric.

[0030] The above technical solution utilizes high-density Oxford cloth for the outer layer of the mailbag. Its tightly woven surface resists friction and scratches during transportation, prevents punctures from sharp objects, and protects the contents of the mailbag from external physical damage. The waterproof interlayer uses a hot-melt adhesive film, which is bonded to the outer and inner layers through a hot-pressing process, filling the gaps in the fabric to form a non-porous waterproof barrier. This effectively prevents moisture from entering the mailbag and provides excellent waterproofing. The protective inner layer uses non-woven fabric, which has a smooth and soft surface. This protects the surface of the mail, reduces friction damage from the inner layer, and ensures that the mail is not damaged during transportation.

[0031] This utility model has the following beneficial effects:

[0032] 1. In this utility model, pressing the pressing rod causes one end of the limiting plate to rotate downwards. Since the middle two sides of the limiting plate are fixed by rotating columns, the other end of the limiting plate is raised, and the limiting plate is no longer stuck in the limiting groove. The return spring in the compressed state will release elastic potential energy, causing the limiting rod to be ejected from the inner wall of the second composite plate. There is no limiting rod to fix the second composite plate and the first composite plate, so the first composite plate and the second composite plate can be separated, and the locking column is released. This allows the fabric strip and zipper to be removed from the inner wall of the outer layer of the mailbag, which is convenient for subsequent inspection and replacement of damaged zippers.

[0033] 2. In this utility model, by using a waterproof curtain to cover the zipper, and then using Velcro and raw edges to seal the waterproof curtain to the outer layer of the mailbag, the zipper can be freely exposed. The outer layer of the mailbag is made of high-density Oxford cloth. The surface of the high-density Oxford cloth is tightly woven to resist friction and scratches during transportation and to prevent sharp objects from puncturing it. The waterproof interlayer is made of hot melt adhesive film. The hot melt adhesive film is bonded to the outer and inner layers through a hot pressing process, thereby filling the gaps in the fabric and forming a non-porous waterproof barrier. Attached Figure Description

[0034] Figure 1 This is a three-dimensional schematic diagram of a multi-layer composite mailbag proposed in this utility model;

[0035] Figure 2 This is a schematic diagram of the carrying strap of a multi-layer composite mailbag proposed in this utility model;

[0036] Figure 3 This is a schematic diagram of the structure of a waterproof fabric curtain for a multi-layer composite mailbag proposed in this utility model;

[0037] Figure 4 for Figure 2Enlarged view of point A in the middle;

[0038] Figure 5 for Figure 2 Enlarged view of point B in the middle;

[0039] Figure 6 for Figure 2 Enlarged view of point C in the middle;

[0040] Figure 7 for Figure 3 Enlarged view of point D in the middle.

[0041] Legend:

[0042] 1. Mailbag; 2. Disassembly mechanism; 21. Plywood 1; 22. Fixing ring; 23. Limiting rod; 24. Return spring; 25. Plywood 2; 26. Limiting groove; 27. Control component; 271. Pressing rod; 272. Limiting plate; 273. Torsion spring; 274. Rotating column; 3. Moisture-proof mechanism; 31. Waterproof curtain; 32. Tear tape; 33. Velcro; 34. Raw edge; 4. Fabric strip; 5. Clip; 6. Waterproof interlayer; 7. Protective inner layer; 8. Shoulder strap; 9. Zipper. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0044] Reference Figure 1 , Figure 2 and Figure 4 This utility model provides an embodiment of a multi-layer composite mailbag, including a mailbag with a moisture-proof mechanism 3 installed on the top. When encountering a humid environment, the moisture-proof mechanism 3 can effectively prevent moisture from entering the mailbag and protect the items inside. The inner wall of the mailbag is equipped with a disassembly mechanism 2. When components such as zippers 9 are damaged and need to be replaced, the disassembly mechanism 2 can easily disassemble the relevant components for easy repair and replacement. The inner wall of the mailbag is fixedly connected with a waterproof interlayer 6, which can fill the gaps in the fabric to form a non-porous waterproof barrier, effectively preventing moisture from penetrating into the interior of the mailbag.

[0045] The inner wall of the waterproof interlayer 6 is fixedly connected to a protective inner layer 7. The non-woven fabric surface of the protective inner layer 7 is smooth and soft, which can protect the surface of the mail and reduce friction damage to the inner layer, thus providing good protection for the mail. The top of the mailbag is fixedly connected to two shoulder straps 8, which make it convenient for users to carry the mailbag and make its use more convenient. The disassembly mechanism 2 includes a first plate 21, which is an important component of the disassembly mechanism 2 and works with other components to achieve the disassembly function. The inner wall of the disassembly mechanism 2 is equipped with a control component 27, which is used to control the operation of the disassembly mechanism 2 and realize the disassembly operation of related components. The sliding connection of the first plate 21 is a limit rod 23, which slides on the first plate 21 and plays a role in limiting and fixing other components under normal conditions.

[0046] A fixing ring 22 is fixedly connected to the outer wall of the limiting rod 23. The fixing ring 22 is used to fix the return spring 24 so that the return spring 24 can function normally. The return spring 24 is fixedly connected to the outer wall of the fixing ring 22. When the limiting rod 23 is restricted, the return spring 24 is in a compressed state. When the restriction is released, it releases elastic potential energy and pushes the limiting rod 23 to pop out. The inner wall of the mailbag is fixedly connected to the second composite plate 25. The second composite plate 25 cooperates with the first composite plate 21 to achieve the fixation and disassembly of related components. The bottom of the second composite plate 25 is detachably connected to the cloth strip 4. The cloth strip 4 can be easily disassembled and connected to the second composite plate 25, which facilitates the replacement or maintenance of the cloth strip 4.

[0047] Specifically, the moisture-proof mechanism 3 at the top of the mailbag can block moisture and protect the items in humid environments. The inner wall has a disassembly mechanism 2 for easy repair and replacement of damaged parts. A waterproof interlayer 6 is fixed to the inner wall to fill gaps and prevent water seepage; its inner wall also has a protective inner layer 7 to protect the surface of the mail. There are two shoulder straps 8 at the top for easy carrying. The disassembly mechanism 2 includes a first composite plate 21, with a control component 27 on the inner wall. The first composite plate 21 is slidably connected to a limiting rod 23. The outer wall of the limiting rod 23 has a fixing ring 22 and a return spring 24, which can push the limiting rod 23 out. A second composite plate 25 is fixed to the inner wall, cooperating with the first composite plate 21 to achieve fixing and disassembly. The bottom of the second composite plate 25 is detachably connected to a fabric strip 4 for easy replacement and maintenance.

[0048] Reference Figure 2 , Figure 5 and Figure 6The control component 27 includes a pressing rod 271, which is the operating component of the control component 27. Pressing the rod triggers subsequent operations. The outer wall of the pressing rod 271 is slidably connected to the inner wall of the second composite plate 25. The pressing rod 271 can slide up and down on the inner wall of the second composite plate 25 to control the limiting plate 272. The bottom of the pressing rod 271 is rotatably connected to the limiting plate 272. When the pressing rod 271 is pressed down, it drives the limiting plate 272 to rotate, thereby changing the relative position of the limiting plate 272 and the limiting rod 23. Rotating columns 274 are rotatably connected to both sides of the inner wall of the second composite plate 25. The rotating columns 274 provide support and a rotation axis for the rotation of the limiting plate 272, allowing the limiting plate 272 to rotate around them.

[0049] The outer walls of the two rotating columns 274 are rotatably connected to the inner wall of the limiting plate 272. The limiting plate 272 is connected to the second composite plate 25 through the rotating columns 274, enabling rotation. A torsion spring 273 is fixedly connected to the outer wall of the limiting plate 272. The torsion spring 273 can provide a reset force after the limiting plate 272 rotates, so that the limiting plate 272 returns to its initial position. The other end of the torsion spring 273 is rotatably connected to the inner wall of the second composite plate 25. The connection between the torsion spring 273 and the second composite plate 25 ensures the realization of its reset function. A limiting groove 26 is opened on the outer wall of the limiting rod 23. The limiting groove 26 is used to cooperate with the limiting plate 272 to restrict the movement of the limiting rod 23 under normal conditions.

[0050] The outer wall of the limiting plate 272 is slidably connected to the inner wall of the limiting groove 26. The limiting plate 272 slides in the limiting groove 26 to limit and unlock the limiting rod 23. The top of the cloth strip 4 is fixedly connected to the locking post 5. The locking post 5 is used to cooperate with the first composite plate 21 and the second composite plate 25 to fix the cloth strip 4. The outer wall of the locking post 5 is detachably connected to the inner wall of the second composite plate 25. The locking post 5 can be easily disassembled and connected to the second composite plate 25, which facilitates the installation and disassembly of the cloth strip 4. The outer wall of the locking post 5 is detachably connected to the inner wall of the first composite plate 21. The connection between the locking post 5 and the first composite plate 21 also allows the cloth strip 4 to be firmly fixed on the mailbag. The other end of the return spring 24 is fixedly connected to the inner wall of the first composite plate 21. The connection between the return spring 24 and the first composite plate 21 ensures the release of its elastic potential energy and the pushing effect on the limiting rod 23.

[0051] Specifically, the control component 27 consists of a pressing rod 271, etc. The pressing rod 271 serves as an operating component, with its outer wall slidably connected to the inner wall of the second composite plate 25. When pressed down, it drives the bottom rotating limit plate 272 to rotate. The rotating columns 274 on both sides of the inner wall of the second composite plate 25 provide support for the rotation of the limit plate 272. One end of the torsion spring 273 on the outer wall of the limit plate 272 is connected to it, and the other end is connected to the second composite plate 25. It can be reset after rotation. The outer wall of the limit rod 23 is provided with a limit groove 26, which cooperates with the limit plate 272. Under normal conditions, it restricts the movement of the limit rod 23. The sliding connection realizes the limiting and unlocking. The top locking post 5 of the cloth strip 4 is detachably connected to the first and second composite plates 21 respectively to fix the cloth strip 4 and facilitate installation and disassembly. One end of the return spring 24 is connected to the fixing ring 22, and the other end is connected to the first composite plate 21 to ensure that the elastic potential energy is released to push the limit rod 23.

[0052] Reference Figure 1 , Figure 3 and Figure 7 The moisture-proof mechanism 3 includes a waterproof curtain 31, which is the main component of the moisture-proof mechanism 3. It can effectively block moisture and protect the items inside the mailbag. The top of the waterproof curtain 31 is fixedly connected to the top of the mailbag, and the connection between the waterproof curtain 31 and the top of the mailbag ensures the stability of its coverage. One end of the waterproof curtain 31 is fixedly connected to a tear strip 32, which allows the user to easily tear open the waterproof curtain 31 to expose components such as the zipper 9 for easy use. The bottom of the waterproof curtain 31 is fixedly connected to a Velcro 33, which, together with the raw edge 34, can firmly cover the waterproof curtain 31 on the zipper 9 to play a moisture-proof role. The top of the mailbag is fixedly connected to a raw edge 34, which, together with the Velcro 33, realizes the connection between the waterproof curtain 31 and the mailbag.

[0053] The control component 27 includes a pressing rod 271, which is a key component for controlling the operation of the disassembly mechanism 2. The disassembly of related components is achieved by operating the pressing rod 271. The outer wall of the pressing rod 271 is slidably connected to the inner wall of the second composite plate 25. The sliding of the pressing rod 271 on the inner wall of the second composite plate 25 provides a condition for controlling the limiting plate 272. The bottom of the pressing rod 271 is rotatably connected to the limiting plate 272. The pressing of the pressing rod 271 can drive the limiting plate 272 to rotate, thereby unlocking the limiting rod 23. Rotating columns 274 are rotatably connected to both sides of the inner wall of the second composite plate 25. The rotating columns 274 provide support and a basis for the rotation of the limiting plate 272. The outer walls of the two rotating columns 274 are rotatably connected to the inner wall of the limiting plate 272. The limiting plate 272 is connected to the second composite plate 25 through the rotating columns 274, enabling it to rotate around the rotating columns 274.

[0054] The outer layer of the mailbag is made of high-density Oxford cloth. The tightly woven surface of the high-density Oxford cloth can resist friction and scratches during transportation and prevent punctures by sharp objects, thus providing good protection for the mailbag. The waterproof interlayer 6 is made of hot melt adhesive film. The hot melt adhesive film is bonded to the outer and inner layers through a hot-pressing process, filling the gaps in the fabric to form a non-porous waterproof barrier, effectively improving the waterproof performance of the mailbag. The protective inner layer 7 is made of non-woven fabric. The smooth and soft surface of the non-woven fabric can protect the surface of the mail and reduce friction damage to the inner layer, thus protecting the mail.

[0055] Specifically, the moisture-proof mechanism 3 includes a waterproof curtain 31, connected to the top of the mailbag, with a tear strip 32 at one end, and the bottom is attached to the mailbag's rough edge 34 via Velcro 33, effectively preventing moisture. In the control component 27, the pressing rod 271 slides on the inner wall of the second plywood 25, pressing down to drive the bottom rotating limit plate 272, which rotates with the help of the rotating column 274 on the inner wall of the second plywood 25, thereby unlocking the limit rod 23 for easy disassembly. The outer layer 1 of the mailbag is made of high-density Oxford cloth, which is abrasion-resistant and puncture-resistant; the waterproof interlayer 6 is a hot melt adhesive film, hot-pressed for excellent waterproofing; the protective inner layer 7 is non-woven fabric, which is soft and protects the mail. All layers work together to ensure the performance of the mailbag.

[0056] Working principle: When zipper 9 is damaged and needs to be removed, press the pressing lever 271. The downward pressure of the pressing lever 271 causes one end of the limiting plate 272 to rotate downward. Since the middle two sides of the limiting plate 272 are fixed by the rotating column 274, the downward movement of one end of the limiting plate 272, through the lever principle, will cause the other end of the limiting plate 272 to rise. This prevents the limiting plate 272 from jamming the inner wall of the limiting groove 26 opened on the inner wall of the limiting rod 23. At this time, since there is no... The limiting rod 23 is restricted by the object, and the return spring 24, which is in a compressed state, will release elastic potential energy, causing the limiting rod 23 to be ejected from the inner wall of the second composite plate 25. Therefore, there is no limiting rod 23 to fix the second composite plate 25 and the first composite plate 21. However, due to the flexibility of the outer layer 1 of the mailbag, the first composite plate 21 and the second composite plate 25 can be separated, allowing the locking post 5 to be released. This allows the cloth strip 4 and the zipper 9 to be removed from the inner wall of the outer layer 1 of the mailbag for replacement and maintenance.

[0057] In daily use, the outer layer 1 of the mailbag has poor waterproofing and is easily damaged, so waterproofing and reinforcement measures are required. Therefore, a waterproof curtain 31 is used to cover the zipper 9, and then Velcro 33 and raw edges 34 are used to seal the waterproof curtain 31 to the outer layer 1 of the mailbag, thus firmly covering the zipper 9. The waterproof curtain 31 can then be easily torn open by the tear tape 32, allowing the zipper 9 to be freely exposed for use. The outer layer of the mailbag is made of high-density Oxford cloth. The surface of the high-density Oxford cloth is tightly woven to resist friction and scratches during transportation and to prevent puncture by sharp objects. The waterproof interlayer 6 is made of hot melt adhesive film. The hot melt adhesive film is bonded to the outer and inner layers through a hot pressing process, thereby filling the gaps in the fabric and forming a non-porous waterproof barrier. The protective inner layer 7 is made of non-woven fabric. The surface of the non-woven fabric is smooth and soft, which can protect the surface of the mail and reduce friction damage to the inner layer.

[0058] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-layer composite mailing bag comprising a mailing bag (1) characterised in that: The top of the mailbag (1) is equipped with a moisture-proof mechanism (3), the inner wall of the mailbag (1) is equipped with a disassembly mechanism (2), the inner wall of the mailbag (1) is fixedly connected with a waterproof interlayer (6), the inner wall of the waterproof interlayer (6) is fixedly connected with a protective inner layer (7), and the top of the mailbag (1) is fixedly connected with two shoulder straps (8). The disassembly mechanism (2) includes a first composite plate (21), a control component (27) is installed on the inner wall of the disassembly mechanism (2), a limit rod (23) is slidably connected to the first composite plate (21), a fixing ring (22) is fixedly connected to the outer wall of the limit rod (23), a return spring (24) is fixedly connected to the outer wall of the fixing ring (22), a second composite plate (25) is fixedly connected to the inner wall of the mailbag (1), and a cloth strip (4) is detachably connected to the bottom of the first composite plate (21).

2. The multi-layer composite mailbag according to claim 1, characterized in that: The moisture-proof mechanism (3) includes a waterproof curtain (31), the top of which is fixedly connected to the top of the mailbag (1), one end of which is fixedly connected to a tear strip (32), the bottom of which is fixedly connected to a Velcro (33), and the top of which is fixedly connected to a rough edge (34).

3. A multi-layer composite mailbag according to claim 1, characterized in that: The control component (27) includes a pressing rod (271), the outer wall of which is slidably connected to the inner wall of the second composite plate (25), the bottom of which is rotatably connected to a limiting plate (272), and rotating columns (274) are rotatably connected to both sides of the inner wall of the second composite plate (25), the outer walls of which are rotatably connected to the inner wall of the limiting plate (272).

4. A multi-layer composite mailbag according to claim 2, characterized in that: The bottom of the Velcro (33) is detachably connected to the top of the rough edge (34), and the inner wall of the mailbag (1) is detachably connected to a zipper (9).

5. A multi-layer composite mailbag according to claim 3, characterized in that: A torsion spring (273) is fixedly connected to the outer wall of the limiting plate (272), and the other end of the torsion spring (273) is rotatably connected to the inner wall of the composite plate (25).

6. A multi-layer composite mailbag according to claim 5, characterized in that: The outer wall of the limiting rod (23) is provided with a limiting groove (26), and the outer wall of the limiting plate (272) is slidably connected to the inner wall of the limiting groove (26).

7. A multi-layer composite mailbag according to claim 1, characterized in that: The top of the cloth strip (4) is fixedly connected to a locking post (5), the outer wall of the locking post (5) is detachably connected to the inner wall of the second composite plate (25), the outer wall of the locking post (5) is detachably connected to the inner wall of the first composite plate (21), and the other end of the reset spring (24) is fixedly connected to the inner wall of the first composite plate (21).

8. A multi-layer composite mailbag according to claim 1, characterized in that: The outer layer of the mailbag (1) is made of high-density Oxford cloth, the waterproof interlayer (6) is made of hot melt adhesive film, and the protective inner layer (7) is made of non-woven fabric.

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