Buffered corner and bicycle shipping case

Abstract

The application discloses a buffer corner and a bicycle carrying case. The buffer corner comprises an outer shell, an inner three-way piece, an outer EPP buffer piece and an inner EPP buffer piece, and the inner and outer EPP buffer pieces are provided with an embedded structure. The corner has two states: in the first assembly state, the outer shell and the inner three-way piece are clamped and fixed on both sides of a flexible wall surface, the inner and outer EPPs are embedded and spliced, and the inner EPP covers the three-way piece to prevent collision; in the second assembly state, the inner three-way piece and the inner EPP are removed, the outer shell is fixed on a rigid wall surface, and the outer EPP is separately accommodated. The application is flexible and adaptive to soft bags and hard boxes, and simultaneously considers frame support and buffer collision prevention.

Description

Technical Field

[0001] This application relates to the field of corner protector technology for packaging boxes, specifically to a cushioning corner protector and a bicycle transport bag. Background Technology

[0002] With the rise of outdoor cycling, enthusiasts often disassemble their bicycles and ship them to their destination, then reassemble them for outdoor riding. There are currently three types of bicycle transport bags: First, hard-sided bags, which are rigid cases with wheels, typically made of aluminum alloy, PP hollow board, or PP honeycomb board; second, soft-sided bags, which are Oxford cloth bags with wheels, usually made of Oxford cloth with an internal EPE layer; and third, combination bags, typically with a hard material like PP for the bottom or bottom and top, and Oxford cloth for the middle. All three types of bags have an internal frame to support and position the bicycle. The unique feature of the all-aluminum alloy hard-sided bags is that the internal frame is bolted to the bag body, preventing the bicycle from wobbling inside. The other bags use Velcro to fasten the frame to the base, and the sides of the bicycle are padded with foam, but after packing, the bicycle still wobbles from side to side inside the bag. If bicycles are handled roughly during transport, they may be damaged, mainly at the handlebars (bags are usually designed to be very compact for transport, and the foam padding in this area is of limited thickness). It is usually very difficult for users to obtain compensation through normal channels. Summary of the Invention

[0003] To help solve the above-mentioned technical problems, this application provides a cushioned corner protector and a bicycle transport bag.

[0004] In a first aspect, this application provides a cushioning corner protector for installation on the corners of bicycle transport bags, comprising an outer shell, an outer EPP cushioning member, an inner EPP cushioning member, and an internal T-joint arranged in sequence: The inner side of the outer shell forms an outer shell receiving cavity, and the inner edge contour of the outer shell is a first mating contour; The outer contour of the outer EPP buffer is conformally adapted to the inner contour of the outer shell cavity, so that the outer EPP buffer can be fully embedded in the outer shell cavity; the inner side of the outer EPP buffer forms the inner buffer cavity. The outer contour of the inner EPP buffer is conformally matched with the inner contour of the inner buffer cavity, so that the inner EPP buffer can be fully embedded into the inner buffer cavity. The outer edge contour of the internal tee is the second mating contour, which is conformally adapted to the first mating contour. The outer side of the internal tee forms a concave cavity, and the inner contour of the concave cavity is conformally adapted to the outer contour of the inner EPP buffer, so that the inner EPP buffer can be fully embedded in the concave cavity. The inner contour of the concave cavity is conformally adapted to the inner and outer contours of the outer EPP buffer. The internal tee fitting is equipped with a tee connector for inserting the support frame members; The outer shell, outer EPP buffer, inner EPP buffer, and inner T-joint are nested in sequence to form the first assembly state; in this first assembly state, the outer shell and the inner T-joint are located on the outer and inner sides of the flexible wall of the bag, respectively, and are clamped and fixed to both sides of the flexible wall. The outer shell, the outer EPP buffer, and the inner tee are nested in sequence to form a second assembly state. In this second assembly state, the outer shell and the inner tee are located on the outer and inner sides of the rigid wall of the bag, respectively, and are clamped and fixed to both sides of the rigid wall.

[0005] Secondly, this application provides a cushioning corner protector for installation on the edges of a bicycle transport bag, comprising an outer shell, an outer EPP cushioning member, an inner EPP cushioning member, and an internal T-joint arranged in sequence. The inner side of the outer shell forms an outer shell receiving cavity, and the inner edge contour of the outer shell is a first mating contour; The outer contour of the outer EPP buffer is conformally adapted to the inner contour of the outer housing cavity, so that the outer EPP buffer can be fully embedded into the outer housing cavity. The outer end face of the inner EPP buffer is conformally adapted to the inner end face of the outer EPP buffer, so that the inner EPP buffer can be completely embedded into the inner buffer cavity. The outer edge contour of the internal tee is the second mating contour, which is conformally adapted to the first mating contour. The outer side of the internal tee forms a concave cavity, and the inner contour of the concave cavity is conformally adapted to the outer contour of the inner EPP buffer, so that the inner EPP buffer can be fully embedded in the concave cavity. The inner contour of the concave cavity is conformally adapted to the inner and outer contours of the outer EPP buffer. The internal tee fitting is equipped with a tee connector for inserting the support frame members; The outer shell, outer EPP buffer, inner EPP buffer, and inner T-joint are nested in sequence to form the first assembly state; in this first assembly state, the outer shell and the inner T-joint are located on the outer and inner sides of the flexible wall of the bag, respectively, and are clamped and fixed to both sides of the flexible wall. The outer shell, the outer EPP buffer, and the inner tee are nested in sequence to form a second assembly state. In this second assembly state, the outer shell and the inner tee are located on the outer and inner sides of the rigid wall of the bag, respectively, and are clamped and fixed to both sides of the rigid wall.

[0006] The outer EPP buffer and the inner EPP buffer have matching fitting structures on their opposite end faces; the fitting structure includes a positioning groove on the end face of the outer EPP buffer and a positioning protrusion on the end face of the inner EPP buffer that matches the shape of the positioning groove; or, the fitting structure includes a positioning protrusion on the end face of the outer EPP buffer and a positioning groove on the end face of the inner EPP buffer that matches the shape of the positioning protrusion.

[0007] The inner edge of the outer shell has three mutually perpendicular flat mounting surfaces, which converge at a single vertex. These mounting surfaces are used to fit against the outer surface of the bag. At least two through-hole fixing holes are evenly distributed on the mounting surfaces. The internal tee is provided with threaded holes corresponding to the positions of the fixing holes. The outer shell is clamped and fixed to the internal tee by fasteners that are sequentially inserted through the fixing holes, the flexible wall of the bag, and screwed into the threaded holes.

[0008] The inner edge of the outer shell has two flat mounting surfaces that are perpendicular to each other and extend along the length direction. The mounting surfaces are used to fit against the outer surface of the bag. At least two through fixing holes are evenly distributed on the mounting surfaces. The internal tee is provided with threaded holes corresponding to the positions of the fixing holes. The outer shell is clamped and fixed to the internal tee by fasteners that are sequentially inserted through the fixing holes, the flexible wall of the bag, and screwed into the threaded holes.

[0009] The outer wall of the outer shell protrudes outward to form a buffer section, and the cavity of the outer shell is formed on the inner side of the buffer section; the outer wall of the outer shell is an outwardly protruding arc surface or a multi-faceted surface composed of multiple planes, and the edge of the outer wall of the outer shell smoothly transitions to the side wall; the outer shell and the internal tee are both injection molded from PP material.

[0010] The internal tee is located at the center of the inner side of the outer housing; the internal tee has three mutually perpendicular tee connectors, and the axis of each tee connector is parallel to the corresponding mounting surface; the tee connector is a tubular structure, and its inner diameter is adapted to the outer diameter of the support frame members.

[0011] The internal tee is located at the center of the inner side of the outer housing; the internal tee has two tee connectors that are distributed along the length direction and perpendicular to each other, and the axis of each tee connector is parallel to the corresponding mounting surface; the tee connector is a tubular structure, and its inner diameter is adapted to the outer diameter of the support frame rod.

[0012] The inner EPP buffer is fitted to the outer surface of the inner tee; the outer surface of the outer EPP buffer is fitted to the inner wall of the outer housing cavity of the outer housing, and the outer contour of the outer EPP buffer is consistent with the inner contour of the outer housing cavity; the inner EPP buffer has clearance holes corresponding to the tee connectors, and the tee connectors extend outward through the clearance holes; the inner tee has a concave cavity on the side facing the inner EPP buffer that perfectly matches the outer contour of the inner EPP buffer, and the inner EPP buffer is entirely embedded in the concave cavity, so that the outer surface of the inner EPP buffer is tightly fitted to the inner wall of the concave cavity of the inner tee.

[0013] Thirdly, this application provides a bicycle transport bag, which includes a bag body, a support frame, a plurality of buffer corner protectors as described in the first aspect, and a plurality of buffer corner protectors as described in the second aspect; the buffer corner protectors as described in the first aspect are respectively installed at the eight corners of the bag body, and the buffer corner protectors as described in the second aspect are respectively installed at the middle position of each edge of the bag body; the support frame is spliced ​​from multiple rods, and the two ends of each rod are respectively inserted into the three-way connectors of two oppositely arranged buffer corner protectors, so that the bag body, buffer corner protectors and support frame form an integral rigid structure.

[0014] In summary, this application achieves flexible switching between two assembly states for the buffer corner protectors through a modular nested design of an outer shell, an outer EPP buffer, an inner EPP buffer, and an inner T-joint. In the first assembly state, the outer shell and the inner T-joint clamp and fix the flexible wall surface and provide frame support, while the inner EPP buffer covers the T-joint for energy absorption and isolation, preventing the vehicle frame from colliding head-on with the rigid frame. Combined with the outer EPP buffer, this achieves double buffer protection from both inside and outside. In the second assembly state, for rigid walls with their own supporting capacity, the inner T-joint and the inner EPP buffer are removed, leaving only the outer EPP buffer to provide external impact protection. Thus, a single modular structure can meet both the impact protection safety of a soft-pack and the needs of a hard-pack. Attached Figure Description

[0015] Figure 1 This is an exploded view of a first embodiment of a buffer corner protector according to this application; Figure 2 for Figure 1The diagram shows the overall structure from a first-view perspective of the embodiment shown. Figure 3 for Figure 1 The diagram shows the overall structure from a second perspective in the embodiment shown. Figure 4 This is an exploded view of a second embodiment of a buffer corner protector according to this application; Figure 5 for Figure 4 The diagram shows the overall structure from a first-view perspective of the embodiment shown. Figure 6 for Figure 4 The diagram shows the overall structure from a second perspective in the embodiment shown. Figure 7 A schematic diagram of the zipper structure for a bicycle transport bag; Figure 8 An internal frame installation structure for bicycle transport cases.

[0016] Reference numerals: 11-First outer shell; 111-First fixing hole; 112-First outer shell accommodating cavity; 113-First buffer part; 21-First outer EPP buffer; 211-Inner buffer accommodating cavity; 31-First inner EPP buffer; 311-First positioning protrusion; 41-First internal tee; 411-First tee connector; 412-First concave cavity; 413-First threaded hole; 12-Second outer shell Body; 121-Second fixing hole; 122-Second outer shell accommodating cavity; 123-Second buffer part; 22-Second outer EPP buffer; 221-Second positioning groove; 32-Second inner EPP buffer; 321-Second positioning protrusion; 322-Second clearance hole; 42-Second internal tee; 421-Second tee insertion interface; 422-Second concave cavity; 423-Second threaded hole; 6-Zipper; 7-Aluminum alloy rod. Detailed Implementation

[0017] The present application will be further described below with reference to the accompanying drawings. The principles of the present application are very clear to those skilled in the art. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

[0018] For bicycle transport cases, which present two distinct application scenarios—flexible walls (such as soft-sided bags) and rigid walls (such as aircraft hard-sided cases)—a modular cushioning corner protector is provided, allowing for flexible switching between assembly states. The principle is as follows: When used for transporting soft-sided bags, the flexible wall cannot provide support, necessitating internal frame support. Therefore, an internal T-joint is required to clamp and fix the flexible wall to the outer shell. Simultaneously, to prevent a hard-hit collision between the rigid frame and the rigid internal T-joint, an inner EPP cushioning element must cover the T-joint for energy absorption and isolation. At this point, the outer and inner EPP cushioning elements are joined together through a fitting structure, forming a complete inner and outer cushioning layer (i.e., the first assembly state). When applied to aircraft hard cases, the rigid wall itself has extremely strong support, eliminating the need for an internal frame, thus the internal tee is removed. Since the internal tee has been removed, the inner EPP buffer used to cover the tee also loses its protective object and mounting base. At the same time, the rigid wall is not afraid of impacts from internal hard objects, so the inner EPP buffer is also removed, leaving only the outer EPP buffer to be housed separately in the outer shell cavity to provide external impact protection, achieving lightweighting (i.e., the second assembly state).

[0019] It should be noted that the “contour fitting” mentioned in this application refers to the corresponding and matching contours of two cooperating components (such as a buffer and a receiving cavity, or two opposing end faces), so that one component can be smoothly and tightly embedded or fitted into the other component, and the contact surfaces of the two are consistent in shape and fit tightly, thereby achieving precise positioning and stable assembly.

[0020] Figures 1 to 3 The structure of the first embodiment of this application is shown. This embodiment provides a cushioning corner protector for installation on the corners of a bicycle transport bag.

[0021] Specifically, the buffer corner protector includes a first outer shell 11, a first inner tee 41, a first outer EPP buffer 21, and a first inner EPP buffer 31.

[0022] The first outer shell 11 is located on the outside of the bag and has a first outer shell receiving cavity 112. The outer wall of the first outer shell 11 protrudes outward to form a first buffer portion 113, and the first outer shell receiving cavity 112 is formed on the inner side of the first buffer portion 113. The outer wall of the first outer shell 11 is an outwardly convex arc-shaped surface or a polygonal surface composed of multiple planes, and the edge of the outer wall smoothly transitions to the side wall to avoid scratching the operator or damaging the packing straps. The inner edge of the first outer shell 11 has three mutually perpendicular flat mounting surfaces, which intersect at a vertex for fitting against the outer surface of the bag's corners. At least two through first fixing holes 111 are evenly distributed on the mounting surfaces.

[0023] The first internal tee fitting 41 is located inside the bag and has a first tee connector 411 for inserting into the support frame. The first internal tee fitting 41 is located at the center of the inner side of the first outer shell 11 and has three mutually perpendicular first tee connectors 411, each with its axis parallel to the corresponding mounting surface. The first tee connector 411 is a tubular structure, and its inner diameter matches the outer diameter of the support frame members. The first internal tee fitting 41 has a first threaded hole 413 corresponding to the position of the first fixing hole 111. Both the first outer shell 11 and the first internal tee fitting 41 are injection molded from PP material.

[0024] The first outer EPP buffer 21 is housed within the first outer housing cavity 112, with its outer surface conforming to the inner wall of the first outer housing cavity 112 of the first outer housing 11, and its outer contour matching the inner contour shape of the first outer housing cavity 112; the inner side of the first outer EPP buffer 21 forms an inner buffer cavity 211; the outer contour of the first inner EPP buffer 31 is conformally adapted to the inner contour of the inner buffer cavity 211, so that the first inner EPP buffer 31 can be integrally embedded into the inner buffer cavity 211.

[0025] The first inner EPP buffer 31 is located between the first inner tee 41 and the first outer EPP buffer 21, and is in contact with the outer surface of the first inner tee 41. The first inner EPP buffer 31 has a first clearance hole (not shown in the figure) that corresponds one-to-one with the first tee connector 411, and the first tee connector 411 extends outward through the clearance hole. The side of the first inner tee 41 facing the first inner EPP buffer 31 has a first concave cavity 412 that perfectly matches the outer contour of the first inner EPP buffer 31. The first inner EPP buffer 31 is completely embedded in the first concave cavity 412, so that the outer surface of the first inner EPP buffer 31 is tightly fitted with the inner wall of the first concave cavity 412 of the first inner tee 41.

[0026] The end faces of the first outer EPP buffer 21 and the first inner EPP buffer 31 are provided with a mating structure. In this embodiment, the mating structure includes a first positioning groove (not shown in the figure) provided on the end face of the first outer EPP buffer 21, and a first positioning protrusion 311 provided on the end face of the first inner EPP buffer 31 and adapted to the shape of the positioning groove; or, the mating structure includes a positioning protrusion provided on the end face of the first outer EPP buffer 21, and a positioning groove provided on the end face of the first inner EPP buffer 31 and adapted to the shape of the positioning protrusion.

[0027] The buffer corner protector in this embodiment has a first assembly state and a second assembly state: In the first assembled state, when used for transporting soft bags, the flexible wall surface cannot provide support on its own and requires an internal frame. The first outer shell 11 and the first internal three-way connector 41 are clamped and fixed to both sides of the flexible wall surface of the bag. The first outer shell 11 is clamped and fixed to the first internal three-way connector 41 by fasteners that pass through the first fixing hole 111 and the flexible wall surface of the bag and are screwed into the first threaded hole 413. At this time, in order to avoid the frame and the three-way connector from colliding head-on, the first outer EPP buffer 21 and the first inner EPP buffer 31 are spliced ​​together by a fitting structure. The first inner EPP buffer 31 covers the outside of the first internal three-way connector 41, providing isolation and cushioning energy absorption.

[0028] In the second assembly state, when applied to a flight case, the rigid wall itself provides support and no internal frame is required. The first internal tee 41 is removed, and the first outer shell 11 is fixed to the outside of the rigid wall of the case. Simultaneously, since the internal tee 41 has been removed, the first inner EPP buffer 31, which covers it, also loses its protective object and mounting base; therefore, it is removed, leaving only the first outer EPP buffer 21, which is separately housed within the first outer shell's receiving cavity 112, achieving both lightweight design and external impact protection.

[0029] In use, in soft-pack projects, the fabric constituting the soft pack (900D Oxford cloth, polyester, coated with eucalyptus, surface water-repellent treatment, inner PE woven fabric 200-300 grams, 1.3mm thick) will be sandwiched between the inner edge contour of the first outer shell 11 and the outer edge contour of the first inner tee 41. Some fabric will also be sandwiched between the first outer shell receiving cavity 112 and the first outer EPP buffer 21. This is due to the bag manufacturing process. Generally, adjacent sides of bags are made by sewing together, which is easier to produce. When installing handles, wheels, or designed corner protectors later, the corresponding parts are cut with a knife.

[0030] Figures 4 to 6 The structure of a second embodiment of this application is shown. This embodiment provides a cushioning corner protector for installation on the edges of a bicycle transport bag. The main difference between this embodiment and the first embodiment is the adaptation to the edge structure.

[0031] Specifically, the buffer corner protector includes a second outer housing 12, a second inner tee 42, a second outer EPP buffer 22, and a second inner EPP buffer 32.

[0032] The inner edge of the second outer housing 12 has two flat mounting surfaces that are perpendicular to each other and extend along the length direction. At least two through second fixing holes 121 are evenly distributed on the mounting surfaces. The outer wall of the second outer housing 12 protrudes outward to form a second buffer portion 123. A second outer housing receiving cavity 122 is formed inside the second buffer portion 123 and extends along the length direction of the edge.

[0033] The second internal tee member 42 has two second tee connectors 421 that are distributed along the length direction and perpendicular to each other. The second internal tee member 42 is provided with a second threaded hole 423 corresponding to the position of the second fixing hole 121. A second concave cavity 422 is formed on the side of the second internal tee member 42 facing the second inner EPP buffer member 32.

[0034] The second outer EPP buffer 22 is housed within the second outer housing cavity 122, with its outer surface conforming to the inner wall of the second outer housing cavity 122 and its outer contour matching the inner contour shape of the second outer housing cavity 122. The outer end face of the second inner EPP buffer 32 is conformally adapted to the inner end face of the second outer EPP buffer 22, allowing the second inner EPP buffer 32 to be integrally embedded within the inner buffer cavity.

[0035] The second inner EPP buffer 32 has a second clearance hole 322 that corresponds one-to-one with the second three-way connector 421. The end face of the second inner EPP buffer 32 has a second positioning protrusion 321. The end face of the second outer EPP buffer 22 has a second positioning groove 221 that mates with the second positioning protrusion 321.

[0036] The switching principle between the first assembly state and the second assembly state in this embodiment is exactly the same as that in the first embodiment: In the first assembly state, the second outer shell 12 is clamped and fixed to the second inner tee member 42 by fasteners that are sequentially inserted through the second fixing hole 121, the flexible wall of the bag and screwed into the second threaded hole 423, and the second inner EPP buffer member 32 is embedded in the second concave cavity 422 and spliced ​​together with the second positioning protrusion 321 and the second positioning groove 221; In the second assembly state, the second inner tee member 42 and the second inner EPP buffer member 32 are removed, and the second outer EPP buffer member 22 is separately housed in the second outer shell housing cavity 122.

[0037] In use, in soft-pack projects, the fabric constituting the soft-pack (900D Oxford cloth, polyester, coated with eucalyptus, surface water-repellent treatment, inner PE woven fabric 200-300g, 1.3mm thick) will be sandwiched between the inner edge contour of the second outer shell 12 and the outer edge contour of the second inner tee 42. Some fabric will also be sandwiched between the second outer shell receiving cavity 122 and the second outer EPP buffer 221. This is due to the bag manufacturing process. Generally, adjacent sides of bags are made by sewing together, which is easier to produce. When installing handles, wheels, or corner protectors as designed by us, we use a knife to cut the corresponding parts.

[0038] like Figure 7 and Figure 8 As shown, this application also discloses a bicycle transport bag, including a bag body, a support frame 7, multiple corner cushioning protectors as described in the first embodiment, and multiple edge cushioning protectors as described in the second embodiment. The bag body is a cuboid structure with dimensions of 1180mm × 260mm × 880mm (excluding corner protectors) after molding. The bag body is made of 900D Oxford cloth, polyester material, coated with eucalyptus resin and treated with water repellency, and has an internal 200-300g PE woven fabric lining with a thickness of 1.3mm. The bag body is equipped with a zipper 6, wherein the top expandable zipper 6, when opened, can increase the local height of the bag body by 50-100mm to accommodate bicycles of different sizes. Eight corner cushioning protectors are respectively installed at the eight corners of the bag body, and multiple edge cushioning protectors are respectively installed at the middle position of each edge of the bag body. The support frame 7 is composed of multiple aluminum alloy rods. Each rod's two ends are inserted into two opposing tee connectors of the cushioning corner protectors, forming a rigid, integrated structure with the bag body, cushioning corner protectors, and support frame 7. The cushioning corner protectors are fixed to the bag body with screws or rivets. The bag body can be a soft-pack or a combination of soft and hard materials. For the combination of soft and hard materials, the bottom or bottom and top are made of PP material, while the middle section is made of Oxford cloth.

[0039] As described in the first embodiment, the buffer corner protectors are installed at the eight corners of the bag body. As described in the second embodiment, the buffer corner protectors are installed at the middle of each edge of the bag body. The support frame is composed of multiple rods, with each rod's two ends inserted into the first T-junction interface 411 or the second T-junction interface 421 of two oppositely arranged buffer corner protectors, forming an integral rigid structure of the bag body, buffer corner protectors, and support frame. When subjected to external impact, the external impact force is first borne by the buffer part and then transferred to the outer EPP buffer to absorb energy. In the soft-pack state, the inner EPP buffer can also effectively prevent rigid collisions between the frame and the rigid T-junction, providing all-round buffer protection.

[0040] The technical scope of this application is not limited to the contents of the above specification. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this application, and all such modifications and variations should fall within the scope of this application.

Claims

1. A cushioning corner protector for installation on the corners of bicycle transport bags, characterized in that, This includes an outer shell, an outer EPP buffer, an inner EPP buffer, and an internal tee, arranged in a nested configuration: The inner side of the outer shell forms an outer shell receiving cavity, and the inner edge contour of the outer shell is a first mating contour; The outer contour of the outer EPP buffer is conformally adapted to the inner contour of the outer shell cavity, so that the outer EPP buffer can be fully embedded in the outer shell cavity; the inner side of the outer EPP buffer forms the inner buffer cavity. The outer contour of the inner EPP buffer is conformally matched with the inner contour of the inner buffer cavity, so that the inner EPP buffer can be fully embedded into the inner buffer cavity. The outer edge contour of the internal tee is the second mating contour, which is conformally adapted to the first mating contour. The outer side of the internal tee forms a concave cavity, and the inner contour of the concave cavity is conformally adapted to the outer contour of the inner EPP buffer, so that the inner EPP buffer can be fully embedded in the concave cavity. The inner contour of the concave cavity is conformally adapted to the inner and outer contours of the outer EPP buffer. The internal tee fitting is equipped with a tee connector for inserting the support frame members; The outer shell, outer EPP buffer, inner EPP buffer, and inner T-joint are nested in sequence to form the first assembly state; in this first assembly state, the outer shell and the inner T-joint are located on the outer and inner sides of the flexible wall of the bag, respectively, and are clamped and fixed to both sides of the flexible wall. The outer shell, the outer EPP buffer, and the inner tee are nested in sequence to form a second assembly state. In this second assembly state, the outer shell and the inner tee are located on the outer and inner sides of the rigid wall of the bag, respectively, and are clamped and fixed to both sides of the rigid wall.

2. A cushioning corner protector for installation on the edges of bicycle transport bags, characterized in that, This includes an outer shell, an outer EPP buffer, an inner EPP buffer, and an internal tee, arranged in a nested configuration: The inner side of the outer shell forms an outer shell receiving cavity, and the inner edge contour of the outer shell is a first mating contour; The outer contour of the outer EPP buffer is conformally adapted to the inner contour of the outer housing cavity, so that the outer EPP buffer can be fully embedded into the outer housing cavity. The outer end face of the inner EPP buffer is conformally adapted to the inner end face of the outer EPP buffer, so that the inner EPP buffer can be completely embedded into the inner buffer cavity. The outer edge contour of the internal tee is the second mating contour, which is conformally adapted to the first mating contour. The outer side of the internal tee forms a concave cavity, and the inner contour of the concave cavity is conformally adapted to the outer contour of the inner EPP buffer, so that the inner EPP buffer can be fully embedded in the concave cavity. The inner contour of the concave cavity is conformally adapted to the inner and outer contours of the outer EPP buffer. The internal tee fitting is equipped with a tee connector for inserting the support frame members; The outer shell, outer EPP buffer, inner EPP buffer, and inner T-joint are nested in sequence to form the first assembly state; in this first assembly state, the outer shell and the inner T-joint are located on the outer and inner sides of the flexible wall of the bag, respectively, and are clamped and fixed to both sides of the flexible wall. The outer shell, the outer EPP buffer, and the inner tee are nested in sequence to form a second assembly state. In this second assembly state, the outer shell and the inner tee are located on the outer and inner sides of the rigid wall of the bag, respectively, and are clamped and fixed to both sides of the rigid wall.

3. The buffer corner protector according to claim 1 or 2, characterized in that, The outer EPP buffer and the inner EPP buffer have matching fitting structures on their opposite end faces; the fitting structure includes a positioning groove on the end face of the outer EPP buffer and a positioning protrusion on the end face of the inner EPP buffer that matches the shape of the positioning groove; or, the fitting structure includes a positioning protrusion on the end face of the outer EPP buffer and a positioning groove on the end face of the inner EPP buffer that matches the shape of the positioning protrusion.

4. The buffer corner protector according to claim 1, characterized in that, The inner edge of the outer shell has three mutually perpendicular flat mounting surfaces, which converge at a single vertex. These mounting surfaces are used to fit against the outer surface of the bag. At least two through-hole fixing holes are evenly distributed on the mounting surfaces. The internal tee is provided with threaded holes corresponding to the positions of the fixing holes. The outer shell is clamped and fixed to the internal tee by fasteners that are sequentially inserted through the fixing holes, the flexible wall of the bag, and screwed into the threaded holes.

5. The buffer corner protector according to claim 2, characterized in that, The inner edge of the outer shell has two flat mounting surfaces that are perpendicular to each other and extend along the length direction. The mounting surfaces are used to fit against the outer surface of the bag. At least two through fixing holes are evenly distributed on the mounting surfaces. The internal tee is provided with threaded holes corresponding to the positions of the fixing holes. The outer shell is clamped and fixed to the internal tee by fasteners that are sequentially inserted through the fixing holes, the flexible wall of the bag, and screwed into the threaded holes.

6. The buffer corner protector according to claim 1 or 2, characterized in that, The outer wall of the outer shell protrudes outward to form a buffer section, and the cavity of the outer shell is formed on the inner side of the buffer section; the outer wall of the outer shell is an outwardly protruding arc surface or a multi-faceted surface composed of multiple planes, and the edge of the outer wall of the outer shell smoothly transitions to the side wall; the outer shell and the internal tee are both injection molded from PP material.

7. The buffer corner protector according to claim 1, characterized in that, The internal tee is located at the center of the inner side of the outer housing; the internal tee has three mutually perpendicular tee connectors, and the axis of each tee connector is parallel to the corresponding mounting surface; the tee connector is a tubular structure, and its inner diameter is adapted to the outer diameter of the support frame members.

8. The buffer corner protector according to claim 2, characterized in that, The internal tee is located at the center of the inner side of the outer housing; the internal tee has two tee connectors that are distributed along the length direction and perpendicular to each other, and the axis of each tee connector is parallel to the corresponding mounting surface; the tee connector is a tubular structure, and its inner diameter is adapted to the outer diameter of the support frame rod.

9. The buffer corner protector according to claim 1 or 2, characterized in that, The inner EPP buffer is fitted to the outer surface of the inner tee; the outer surface of the outer EPP buffer is fitted to the inner wall of the outer housing cavity of the outer housing, and the outer contour of the outer EPP buffer is consistent with the inner contour of the outer housing cavity; the inner EPP buffer has clearance holes corresponding to the tee connectors, and the tee connectors extend outward through the clearance holes; the inner tee has a concave cavity on the side facing the inner EPP buffer that perfectly matches the outer contour of the inner EPP buffer, and the inner EPP buffer is entirely embedded in the concave cavity, so that the outer surface of the inner EPP buffer is tightly fitted to the inner wall of the concave cavity of the inner tee.

10. A bicycle transport bag, characterized in that, The bag includes a main body, a support frame, multiple cushioning corner protectors as described in claim 1, and multiple cushioning corner protectors as described in claim 2. The cushioning corner protectors as described in claim 1 are respectively installed at the eight corners of the main body, and the cushioning corner protectors as described in claim 2 are respectively installed at the middle position of each edge of the main body. The support frame is composed of multiple rods spliced ​​together, and the two ends of each rod are respectively inserted into the three-way connectors of two oppositely arranged cushioning corner protectors, so that the main body, cushioning corner protectors and support frame form an integral rigid structure.

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