A paper foldable suitcase

Abstract

The application relates to a paper foldable suitcase, which comprises a bottom plate, a paper plate assembly fixedly connected to the top of the bottom plate, a supporting paper frame fixedly connected to the front bottom of the bottom plate, bearing rings fixedly connected to the left and right sides of the rear bottom of the bottom plate, universal wheels rotationally connected to the inner rings of the bearing rings, and a central rod rotationally connected to the center of the bottom plate. The application adopts the silanization treatment hard paper base composite material brush water plate matched with the universal wheel transmission system to automatically clean the residual water stains and dust on the bottom plate during movement, the three-layer reinforced bottom plate and the polypropylene waterproof film form a composite protection system, the honeycomb composite paper box body and the plug-in folding structure are combined, the waterproof and wear-resistant performance is guaranteed, and quick folding and storage are realized, the hydrogenated butyl rubber transmission belt and the low-friction bearing ring enable the paper box to still move smoothly in the bearing state, the problems of traditional paper boxes, such as water resistance, dirtiness and short service life, are solved, and the paper box has the advantages of environmental protection, practicality and durability.

Description

Technical Field

[0001] This application relates to the technical field of paper packaging boxes, and in particular to a paper foldable carrying case. Background Technology

[0002] Traditional paper packaging boxes generally suffer from poor waterproof performance, susceptibility to moisture and deformation, and easy accumulation of dust and dirt on the bottom. Especially when used as reusable suitcases, conventional waterproofing treatments are insufficient to cope with liquid splashes and friction wear during long-term use. While existing technologies use plastic linings or metal fittings to improve durability, they compromise the environmentally friendly properties of paper materials, and the complex folding structure affects ease of use. Furthermore, the bottom cleaning design of ordinary cardboard boxes often relies on external accessories, which not only increases costs but also results in a bulky structure, making it difficult to balance the requirements of lightweight, environmental protection, and functionality. Summary of the Invention

[0003] To address the aforementioned problems, this application provides a paper foldable suitcase.

[0004] This application provides a paper foldable suitcase, which adopts the following technical solution: A paper foldable suitcase includes: a base plate, a cardboard assembly fixedly connected to the top of the base plate, a supporting paper holder fixedly connected to the front side of the bottom of the base plate, bearing rings fixedly connected to the left and right sides of the rear side of the bottom of the base plate, universal wheels rotatably connected to the inner ring of the bearing rings, a central rod rotatably connected to the center of the bottom of the base plate, a water brush plate fixedly connected to the front and rear sides of the surface of the central rod, and synchronous wheels fixedly connected to the surface of the universal wheels and the bottom of the central rod. The surface of the synchronous wheel has a groove, and the groove wall is fitted with an elastic rubber band.

[0005] As a preferred technical solution of this application, the cardboard assembly includes a first cardboard, a second cardboard fixedly connected to the left side of the first cardboard, a first insert plate fixedly connected to the left side of the second cardboard, a third cardboard fixedly connected to the right side of the first cardboard, a second insert plate fixedly connected to the right side of the third cardboard, a fourth cardboard fixedly connected to the front side of the first cardboard, a fixed paper frame fixedly connected to the front side of the bottom of the fourth cardboard, a fifth cardboard fixedly connected to the rear side of the first cardboard, a sixth cardboard fixedly connected to the rear side of the fifth cardboard, an L-shaped insert plate fixedly connected to the rear side of the sixth cardboard, the L-shaped insert plate slidingly inserted into the inner wall of the fixed paper frame, fixing grooves are provided on both the left and right sides of the top surface of the fourth cardboard, the groove walls of the two fixing grooves slidingly inserted into the surfaces of the first insert plate and the second insert plate respectively, and the first cardboard and the bottom plate are glued together with waterproof adhesive.

[0006] As a preferred technical solution of this application, the first paperboard, the second paperboard and the third paperboard are made of honeycomb composite paperboard, and the surfaces of the first paperboard, the second paperboard and the third paperboard are provided with a polypropylene waterproof membrane layer.

[0007] As a preferred technical solution of this application, the fixed paper frame and the L-shaped insert are made of wax-impregnated hardened cardboard, and the back side of the fifth cardboard is fixedly connected to a pull plate by adhesive.

[0008] As a preferred technical solution of this application, the fourth and fifth paperboards are made of a three-layer composite structure, which includes an outer tear-resistant kraft paper layer, a middle aramid fiber reinforcement layer, and an inner polyethylene foam layer.

[0009] As a preferred technical solution of this application, the material of the sixth paperboard is biodegradable PLA modified paperboard, and the surface of the PLA modified paperboard is treated with plasma hydrophobicity.

[0010] As a preferred technical solution of this application, the material of the water brush plate is a silanized hard paper-based composite material, and the base plate and the supporting paper frame are bonded together with waterproof adhesive.

[0011] As a preferred technical solution of this application, the elastic rubber strip is made of hydrogenated nitrile butadiene rubber.

[0012] In summary, this application includes at least one of the following beneficial technical effects of a paper foldable suitcase: This application utilizes a silanized hard paper-based composite material water-repellent board combined with a universal wheel drive system to automatically clean residual water stains and dust from the bottom plate during movement. The three-layer reinforced bottom plate and polypropylene waterproof membrane form a composite protective system. Combined with a honeycomb composite cardboard box body and a plug-in folding structure, it achieves rapid folding and storage while ensuring waterproof and wear-resistant performance. The hydrogenated nitrile rubber drive belt and low-friction bearing ring ensure that the carton remains smooth to move under load. This application effectively solves the problems of traditional cardboard boxes being susceptible to water damage, easily getting dirty, and having a short lifespan, and is environmentally friendly, practical, and durable. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a schematic diagram of the unfolded cardboard assembly in this application; Figure 3 This is a schematic diagram of the cardboard assembly after folding in this application; Figure 4 This application Figure 1 Exploded view of the middle and bottom structure; Figure 5 This application Figure 4 Enlarged view of the omnidirectional wheel structure.

[0014] Explanation of reference numerals in the attached drawings: 1. Cardboard assembly; 2. Base plate; 3. Supporting paper holder; 4. Casters; 5. Center rod; 6. Water brush plate; 7. Bearing ring; 8. Synchronous wheel; 9. Groove; 10. Elastic rubber belt; 11. Hand pull plate; 101. Second cardboard; 102. First insert plate; 103. Fourth cardboard; 104. Fixed paper frame; 105. Third cardboard; 106. Second insert plate; 107. Fifth cardboard; 108. Sixth cardboard; 109. Fixing groove; 110. L-shaped insert plate; 111. First cardboard. Detailed Implementation

[0015] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0016] See Figure 1-5 A paper foldable suitcase includes: a base plate 2, a cardboard assembly 1 fixedly connected to the top of the base plate 2, a supporting paper frame 3 fixedly connected to the front side of the bottom of the base plate 2, bearing rings 7 fixedly connected to the left and right sides of the rear side of the bottom of the base plate 2, universal wheels 4 rotatably connected to the inner ring of the bearing rings 7, a central rod 5 rotatably connected to the center of the bottom of the base plate 2, a water brush plate 6 fixedly connected to the front and rear sides of the surface of the central rod 5, and synchronous wheels 8 fixedly connected to the surface of the universal wheels 4 and the bottom of the central rod 5. The surface of the synchronous wheels 8 has a groove 9, and an elastic rubber strip 10 is sleeved on the groove wall of the groove 9; the water brush plate 6 is made of silanized hard paper-based composite material, and the base plate 2 and the supporting paper frame 3 are bonded together by waterproof adhesive; the elastic rubber strip 10 is made of hydrogenated nitrile rubber. The bottom of the base plate 2 is equipped with a water-brushing plate 6, which is made of silanized hard paper-based composite material with a micron-level groove structure on the surface. When the suitcase turns, the caster wheel 4 drives the center rod 5 to rotate through the synchronous wheel 8 and the elastic rubber belt 10, so that the water-brushing plate 6 is in close contact with the lower surface of the base plate to scrape. The groove structure of the water-brushing plate can effectively absorb and scrape away water stains, dust and other contaminants remaining on the base plate, and prevent the cardboard from softening due to long-term immersion in water. The base plate 2 adopts a three-layer reinforcement design, including a surface layer, a middle layer and a bottom layer. The surface layer is made of polypropylene film hot-pressed composite, the middle layer is made of honeycomb cardboard impregnated with water-based polyurethane resin, and the bottom layer is made of silanized hard cardboard and forms a wear-resistant pair with the water-brushing plate 6. More specifically in this application: The top of the sixth cardboard 108 is provided with a viewing hole, and the front side of the fourth cardboard 103 is also provided with a viewing hole. The walls of the viewing holes are sealed with transparent plastic sheets. The elastic rubber belt 10 is made of hydrogenated nitrile rubber, which ensures transmission efficiency and avoids overload damage to the cardboard; the bearing ring 7 is lined with polytetrafluoroethylene coating, which makes the coefficient of friction <0.1, so that the carton can still be pulled by one hand even when the battery is loaded.

[0017] The cardboard assembly 1 includes a first cardboard 111, a second cardboard 101 fixedly connected to the left side of the first cardboard 111, a first insert plate 102 fixedly connected to the left side of the second cardboard 101, a third cardboard 105 fixedly connected to the right side of the first cardboard 111, a second insert plate 106 fixedly connected to the right side of the third cardboard 105, a fourth cardboard 103 fixedly connected to the front side of the first cardboard 111, a fixed paper frame 104 fixedly connected to the front side of the bottom of the fourth cardboard 103, a fifth cardboard 107 fixedly connected to the rear side of the first cardboard 111, a sixth cardboard 108 fixedly connected to the rear side of the fifth cardboard 107, and an L-shaped insert plate 110 fixedly connected to the rear side of the sixth cardboard 108. The L-shaped insert plate 110 slides into the inner wall of the fixed paper frame 104. Fixing grooves 109 are provided on both the left and right sides of the top surface of the fourth cardboard 103. The groove wall of 09 is slidably inserted into the surface of the first insert plate 102 and the surface of the second insert plate 106 respectively. The first cardboard 111 is glued to the bottom plate 2 with waterproof adhesive. The first cardboard 111, the second cardboard 101 and the third cardboard 105 are made of honeycomb composite cardboard. The surfaces of the first cardboard 111, the second cardboard 101 and the third cardboard 105 are provided with a polypropylene waterproof membrane layer. The fixed paper frame 104 and the L-shaped insert plate 110 are made of wax-impregnated hardened cardboard. The rear side of the fifth cardboard 107 is fixedly connected with a pull plate 11 by adhesive. The fourth cardboard 103 and the fifth cardboard 107 are made of a three-layer composite structure, which includes an outer tear-resistant kraft paper layer, a middle aramid fiber reinforcement layer and an inner polyethylene foam layer. The sixth cardboard 108 is made of biodegradable PLA modified cardboard. The surface of the PLA modified cardboard is treated with plasma hydrophobicity. After the cardboard assembly 1 is folded, the pull plate 11 is glued to the back of the fifth cardboard 107 with strong glue, thus completing the overall assembly of the carton; The paper suitcase adopts an all-paper foldable structure. The bottom plate 2 is made of high-density honeycomb composite cardboard, and the surface is covered with a 0.3mm polypropylene waterproof film. It is bonded to the cardboard assembly 1 with waterproof glue to ensure overall waterproofness. The cardboard assembly 1 consists of the first cardboard 111 and foldable side plates 101 and 105. The box body is formed by inserting the insert plates 102 and 106 into the fixing groove 109. When folding, the insert plates are pulled out and folded along the pre-pressed crease. The L-shaped insert plate 110 slides out from the fixing paper frame 104 to achieve quick folding.

[0018] This application adopts an all-paper foldable structure. The base plate 2 is made of high-density honeycomb composite cardboard, with a 0.3mm polypropylene waterproof film on the surface, and is bonded to the cardboard assembly 1 with waterproof adhesive to ensure overall waterproofness. The cardboard assembly 1 consists of a first cardboard 111 and foldable side plates 101 and 105. It is fixed to the box body by inserting the insert plates 102 and 106 into the fixing groove 109. When folding, the insert plates are pulled out and folded along the pre-press crease. The L-shaped insert plate 110 slides out from the fixing frame 104 to achieve... The bottom of the base plate 2 is equipped with a water-brushing plate 6, which is made of silanized hard paper-based composite material with a micron-level groove structure on the surface. When the suitcase is turned, the caster wheel 4 drives the center rod 5 to rotate through the synchronous wheel 8 and the elastic rubber belt 10, so that the water-brushing plate 6 is in close contact with the lower surface of the base plate to scrape. The groove structure of the water-brushing plate can effectively absorb and scrape away water stains, dust and other contaminants remaining on the base plate, prevent the cardboard from softening due to long-term immersion in water, improve the service life of the carton and facilitate the use of the carton.

[0019] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A paper foldable suitcase, characterized in that: include: The bottom plate (2) is fixedly connected to the top of the bottom plate (2), and a paperboard assembly (1) is fixedly connected to the front side of the bottom of the bottom plate (2). A paper support frame (3) is fixedly connected to the left and right sides of the bottom rear side of the bottom plate (2). A bearing ring (7) is fixedly connected to the inner ring of the bearing ring (7). A universal wheel (4) is rotatably connected to the center of the bottom of the bottom plate (2). A center rod (5) is rotatably connected to the center rod (5). A water brush plate (6) is fixedly connected to the front and rear sides of the surface of the center rod (5). A synchronous wheel (8) is fixedly connected to the surface of the universal wheel (4) and the bottom of the center rod (5). A groove (9) is opened on the surface of the synchronous wheel (8). An elastic rubber belt (10) is sleeved on the groove wall of the groove (9).

2. The paper foldable suitcase according to claim 1, characterized in that: The cardboard assembly (1) includes a first cardboard (111), a second cardboard (101) fixedly connected to the left side of the first cardboard (111), a first insert plate (102) fixedly connected to the left side of the second cardboard (101), a third cardboard (105) fixedly connected to the right side of the first cardboard (111), a second insert plate (106) fixedly connected to the right side of the third cardboard (105), a fourth cardboard (103) fixedly connected to the front side of the first cardboard (111), a fixed paper frame (104) fixedly connected to the front side of the bottom of the fourth cardboard (103), and a fixed paper frame (104) fixed to the rear side of the first cardboard (111). A fifth cardboard (107) is connected, and a sixth cardboard (108) is fixedly connected to the rear side of the fifth cardboard (107). An L-shaped insert (110) is fixedly connected to the rear side of the sixth cardboard (108). The L-shaped insert (110) is slidably inserted into the inner wall of the fixed paper frame (104). Fixing grooves (109) are provided on both the left and right sides of the top surface of the fourth cardboard (103). The groove walls of the two fixing grooves (109) are slidably inserted into the surface of the first insert (102) and the surface of the second insert (106), respectively. The first cardboard (111) is glued to the bottom plate (2) with waterproof adhesive.

3. A paper foldable suitcase according to claim 2, characterized in that: The first cardboard (111), the second cardboard (101) and the third cardboard (105) are made of honeycomb composite cardboard, and the surfaces of the first cardboard (111), the second cardboard (101) and the third cardboard (105) are provided with a polypropylene waterproof membrane layer.

4. A paper foldable suitcase according to claim 2, characterized in that: The fixed paper frame (104) and the L-shaped insert (110) are made of wax-impregnated hardened paperboard, and the back side of the fifth paperboard (107) is fixedly connected to the pull plate (11) by adhesive.

5. A paper foldable suitcase according to claim 2, characterized in that: The fourth paperboard (103) and the fifth paperboard (107) are made of a three-layer composite structure, which includes an outer tear-resistant kraft paper layer, a middle aramid fiber reinforcement layer and an inner polyethylene foam layer.

6. A paper foldable suitcase according to claim 2, characterized in that: The sixth paperboard (108) is made of biodegradable PLA modified paperboard, and the surface of the PLA modified paperboard is treated with plasma hydrophobicity.

7. A paper foldable suitcase according to claim 1, characterized in that: The water brush plate (6) is made of silanized hard paper-based composite material, and the base plate (2) and the supporting paper frame (3) are bonded together with waterproof adhesive.

8. A paper foldable suitcase according to claim 1, characterized in that: The elastic rubber strip (10) is made of hydrogenated nitrile rubber.

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