A luggage case mouth frame structure capable of quickly connecting a case shell

Abstract

The utility model relates to the field of luggage, concretely relates to a luggage case mouth frame structure of quick connection box shell, it includes two mouth frames of symmetrical arrangement, and the clamping strip of bending mouth frame is equipped with the box shell clamping mouth that can be elastically pried open and its mouth part is narrowed, the mouth part shell board of box shell is in the form of misplacement, it can be embedded in the box shell clamping mouth and one side is attached and the other side is equipped with the gap, and is equipped with the filler in the gap. When mouth frame and box shell carry out connection installation, can use transverse external force to make the mouth part of box shell clamping mouth elastic opening, insert the mouth part shell board of box shell into the box shell clamping mouth of mouth frame, release the external force and make the outer piece of box shell clamping mouth restore original shape, use the filler to fill the gap between the mouth part shell board and the inner side wall of box shell clamping mouth, prevent the mouth part shell board of box shell from the box shell clamping mouth and come out, thereby can realize the quick connection of box shell and mouth frame to improve the operation efficiency, and can reduce the risk that the service life of luggage case is affected by the easy falling of box shell.

Description

Technical Field

[0001] This utility model relates to the field of luggage, specifically to a luggage opening frame structure that can be quickly connected to the luggage shell. Background Technology

[0002] Suitcases are a common tool for carrying items when traveling. The upper and lower shells of suitcases are mostly rigid shells formed by vacuum forming or pressing. Each shell typically requires a frame for sealing and a zipper for opening and closing. To facilitate zipper installation, the applicant disclosed a zipper installation structure for a rolling suitcase in utility model patent CN221729942U. This disclosed technology has a zipper connecting groove on one side of the frame for connecting to the zipper and a box body connecting groove on the other side. A fixing strip is inserted into the fixing sleeve and then into the zipper connecting groove to fix the zipper to the frame, solving the problem of quickly installing the zipper onto the frame. Regarding the connection between the shell and the frame, currently, most methods involve inserting the opening of the shell into the box body connecting groove and then riveting or gluing the opening of the shell to the frame. However, in actual installation and use, it was found that riveting requires positioning on specialized equipment before it can be carried out. The numerous auxiliary steps in the riveting process hinder rapid installation, and the rivets are prone to detaching from the riveting holes over long-term use, affecting the suitcase's lifespan. Adhesive bonding requires a long drying time, also hindering rapid connection. Furthermore, since the groove walls of the suitcase's connecting channels are mostly flat, suitcases glued to the flat door shell walls are also prone to delamination over time, affecting the suitcase's lifespan. Therefore, there is a desire to further improve the suitcase's door frame structure. How to achieve a rapid connection between the shell and the door frame to improve work efficiency and reduce the risk of detachment affecting the suitcase's lifespan is the problem to be solved in this case. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, this utility model discloses a luggage frame structure that allows for quick connection of the luggage shell. The structure includes two symmetrically arranged frames. A clamping strip on the bent frame has a flexible luggage shell clamping opening on one side. The opening of the clamping opening has a left and right shoulder, which are arranged opposite to each other and staggered vertically to narrow the opening. The luggage shell includes an upper shell and a lower shell, which are arranged opposite to each other. The opening shell plate of the shell is staggered with the side shell plate to form an inner step and an outer step. The staggered opening shell plate can be embedded into the clamping opening of the frame. One side of the plate can fit against one side wall of the clamping opening, and its outer step abuts against the shoulder of the right shoulder. A gap exists between the other side of the plate and the other side wall of the clamping opening, and a filler is provided in the gap. The filler can be a flat clip, a hook clip, or expanding foam. The luggage opening frame structure described in this utility model utilizes flat or hook-shaped clips or injected expanding foam to fill the gap between the opening shell plate and the inner side wall of the outer piece of the luggage shell clamping opening. This prevents the opening shell plate from detaching from the clamping opening, thereby enabling a quick connection between the luggage shell and the opening frame, improving work efficiency, and reducing the risk of the luggage shell easily detaching and affecting its service life.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A luggage opening frame structure for quick connection to the luggage shell is disclosed. This opening frame structure can be connected to the opening of the luggage shell and is used for installing the main zipper and zipper pull. The luggage shell includes an upper shell and a lower shell facing each other. The structure is characterized by comprising two opening frames symmetrically arranged between the upper and lower shells. Each opening frame is formed by bending a clamping strip, which has a shell clamping opening with one side being elastic. The shell clamping opening is a flat groove with a left shoulder and a right shoulder at the opening. The left and right shoulders are arranged opposite each other and staggered vertically. The opening of the box shell clamping opening is narrowed. The opening shell plates of the upper and lower box shells are misaligned with their respective side shell plates to form inner and outer steps. The opening shell plates of the upper and lower box shells can be respectively embedded into the box shell clamping openings of the two opening frames. One side of the misaligned opening shell plate can fit against one side of the groove wall of the box shell clamping opening, and its outer step abuts against the shoulder of the right shoulder of the box shell clamping opening. There is a gap between the other side of the misaligned opening shell plate and the other side of the groove wall of the box shell clamping opening, and there is a filler in the gap to prevent the opening shell plates of the upper and lower box shells from coming out of the box shell clamping opening.

[0006] The filling material can be a flat strip, a hook strip, or expanding foam.

[0007] The clamping strip used for bending the frame is a flexible flat strip component. Its cross-section is in the form of multiple segments that are stacked back and forth to form multiple clamping openings. Each clamping opening has an opening that communicates with the outside. The multiple clamping openings include a box shell clamping opening arranged on the left side of the clamping strip and a main zipper clamping opening and a zipper clamping opening arranged from left to right. The piece on the left side of the box shell clamping opening is the outer piece of the box shell clamping opening.

[0008] The opening direction of the box shell clamping opening is opposite to the opening direction of the main zipper clamping opening, the opening direction of the zipper clamping opening is the same as or perpendicular to the opening direction of the box shell clamping opening, and the opening directions of the box shell clamping openings of the two-piece frame are set in opposite directions.

[0009] The outer piece of the box shell clamping opening is elastic, and the outer piece can be locally elastically deformed under lateral external force to make the opening of the box shell clamping opening elastically open. After the lateral external force is released, the outer piece of the box shell clamping opening can return to its original shape under its own elastic force.

[0010] The inner wall of the outer sheet of the box shell clamping opening is provided with a concave surface with a protrusion. The opening shell plates of the upper and lower box shells are provided with flat locking strips on the side with the inner step, and there is a gap between the end of the flat locking strip and the inner step. The flat locking strip is fixed to the opening shell plate. The flat locking strip is made of rubber. The opening shell plate with the flat locking strip can be embedded into the box shell clamping opening with the protrusion and concave surface, and the gap between the opening shell plate and the inner wall of the outer sheet of the box shell clamping opening can be filled by the flat locking strip. The shoulder of the left shoulder of the box shell clamping opening can abut against the end of the flat locking strip.

[0011] Alternatively, the inner wall of the outer panel of the box shell clamping opening is provided with a concave surface with a groove. The opening shell plates of the upper and lower box shells are provided with hook-shaped clips on the side with the inner step, and there is a gap between the end of the hook-shaped clips and the inner step. The hook-shaped clips are fixed to the opening shell plates. The hook-shaped clips are made of rubber. The opening shell plates with hook-shaped clips can be embedded into the box shell clamping opening with grooves and concave surfaces, and the gap between the opening shell plates and the inner wall of the outer panel of the box shell clamping opening can be filled by the hook-shaped clips. The hook head of the hook-shaped clips can be embedded into the groove on the inner wall of the box shell clamping opening. The shoulder of the left shoulder of the box shell clamping opening can abut against the end of the hook-shaped clips.

[0012] Alternatively, the inner wall of the outer sheet of the box shell clamping opening is provided with a concave surface with a protrusion, and the opening shell plates of the upper and lower box shells can be embedded into the box shell clamping opening with the protrusion and concave surface, and the gap between the opening shell plate and the inner wall of the outer sheet of the box shell clamping opening can be filled with expanding foam.

[0013] The luggage opening frame structure that can be quickly connected to the case shell also includes insert rods. There are four insert rods. Two of the four insert rods are inserted into two sleeves set on the main zipper and placed in the corresponding main zipper clamping openings on the two opening frames. The other two insert rods are inserted into the sleeves set on the two inner zippers and placed in the corresponding inner zipper clamping openings on the two opening frames.

[0014] The aforementioned box shell clamping opening, main zipper clamping opening, and zipper clamping opening all extend along the length of the clamping strip.

[0015] The insert rod is a flexible plastic or aluminum rod with a square or trapezoidal cross-section. The sleeves on the main zipper and the zipper belt are flexible fabric sleeves, which can be sewn to the corresponding zipper belt or integrally formed.

[0016] The insertion rod and sleeve extend along the length of the clamping bar.

[0017] As described above, the advantages of the luggage opening frame structure for quick connection of the luggage shell provided by this utility model are as follows: A luggage shell clamping opening with elasticity on one side is provided on the clamping strip of the bent opening frame. A left shoulder and a right shoulder are provided opposite to each other at the opening of the luggage shell clamping opening to narrow the opening. The opening shell plates are misaligned to form an inner step and an outer step. The misaligned opening shell plates can be embedded into the luggage shell clamping opening of the opening frame. One side of the plate can fit against one side of the groove wall of the luggage shell clamping opening, and its outer step abuts against the shoulder of the right shoulder. A gap is provided between the other side of the plate and the other side of the groove wall of the luggage shell clamping opening, and a filler is provided in the gap. The filler can be a flat clip, a hook clip, or expanding foam. When connecting the frame to the case shell, external force is used to pry the elastic opening of the case shell clamping opening laterally, causing the opening to open elastically. The case shell opening plate, with or without flat or hook-shaped locking strips, is then inserted into the frame's clamping opening. Releasing the applied lateral force allows the outer plate of the clamping opening to return to its original shape under its own elasticity. The gap between the opening plate and the inner wall of the clamping opening is filled using flat or hook-shaped locking strips or injected expanding foam to prevent the opening plate from detaching from the clamping opening. This allows for quick connection between the case shell and the frame, improving work efficiency and reducing the risk of the case shell easily detaching and affecting the lifespan of the suitcase. This invention has a reasonable design, simple structure, low cost, and is easy to promote. Attached Figure Description

[0018] Figure 1 This is a general schematic diagram of a luggage opening frame structure that can be quickly connected to the case shell according to the present invention;

[0019] Figure 2 for Figure 1A magnified diagram of the AA housing with flat locking strips on the upper and lower housings;

[0020] Figure 3 This is an enlarged cross-sectional view of the frame when it has a concave surface with a boss on the outer plate of the box shell clamping opening.

[0021] Figure 4 This is an enlarged cross-sectional view of the upper and lower shells when flat retaining strips are provided on the opening shell plates.

[0022] Figure 5 for Figure 1 A magnified diagram of AA with hook-shaped retaining strips on the upper and lower housings;

[0023] Figure 6 This is an enlarged cross-sectional view of the frame when it has a grooved inner concave surface on the outer piece of the box shell clamping opening.

[0024] Figure 7 This is an enlarged cross-sectional diagram of the upper and lower shells with hook-shaped retaining strips on the opening shell plates.

[0025] Figure label:

[0026] 1. Frame; 11. Case clamping opening; 101. Left shoulder; 102. Right shoulder; 111. Outer panel; 112a. Boss; 112b. Groove; 12. Main zipper clamping opening; 13. Liner zipper clamping opening; 2. Upper case; 21. Opening plate; 201. Inner step; 202. Outer step; 22a. Flat locking strip; 22b. Hook-shaped locking strip; 221b. Hook head; 3. Lower case; 4. Main zipper; 5. Liner zipper; 6. Insert rod. Detailed Implementation

[0027] The present invention will be further described below through specific embodiments.

[0028] like Figures 1 to 7As shown, this utility model discloses a luggage opening frame structure that can quickly connect to the luggage shell. This opening frame structure can be connected to the opening of the luggage shell and is used to install the main zipper 4 and the zipper 5. The luggage shell includes an upper shell 2 and a lower shell 3 arranged opposite each other. The opening frame structure includes two opening frames 1 and four insert rods 6. The two opening frames 1 are symmetrically arranged between the upper shell 2 and the lower shell 3. The opening frame 1 is formed by bending a clamping strip. The clamping strip has a box shell clamping opening 11, and one side of the box shell clamping opening 11 is elastic. The box shell clamping opening 11 is a flat groove, and a left shoulder 101 and a right shoulder 102 are provided at the opening of the groove. The left shoulder 101 and the right shoulder 102 are arranged opposite each other and staggered vertically to narrow the opening of the box shell clamping opening 11. The upper shell 2 and the lower shell 3 each have their respective opening shell plates 21 misaligned with their respective side shell plates to form an inner step 201 and an outer step 202. The opening shell plates 21 of the upper shell 2 and the lower shell 3 can be respectively embedded into the shell clamping openings 11 of the two opening frames 1. One side of the misaligned opening shell plate 21 can fit against one side of the groove wall of the shell clamping opening 11, and its outer step 202 abuts against the shoulder of the right shoulder 102 of the shell clamping opening 11. There is a gap between the other side of the misaligned opening shell plate 21 and the other side of the groove wall of the shell clamping opening 11, and there is a filler in the gap to prevent the opening shell plates 21 of the upper shell 2 and the lower shell 3 from coming out of the shell clamping opening 11. The filler can be a flat clip 22a or a hook clip 22b or foam.

[0029] like Figures 1 to 7As shown, the clamping strip used in this utility model for bending the frame 1 is a bendable flat strip component. Its cross-section is formed by multiple segments stacked back and forth to create multiple clamping openings. Each clamping opening has an opening that communicates with the outside. The multiple clamping openings include a box shell clamping opening 11 arranged on the left side of the clamping strip, and a main zipper clamping opening 12 and a zipper clamping opening 13 arranged sequentially from left to right. The piece on the left side of the box shell clamping opening 11 is designated as the outer piece 111 of the box shell clamping opening 11. The opening direction of the box shell clamping opening 11 is opposite to the opening direction of the main zipper clamping opening 12, and the opening direction of the zipper clamping opening 13 is the same as or perpendicular to the opening direction of the box shell clamping opening 11. The opening directions of the box shell clamping openings 11 of the two frames 1 are arranged opposite to each other. The outer piece 111 of the box shell clamping opening 11 is elastic, and under lateral external force prying, the outer piece 111 can locally elastically deform, causing the opening of the box shell clamping opening 11 to elastically open. After the lateral external force is released, the outer piece 111 of the box shell clamping opening 11 can return to its original shape under its own elastic force. The insert rod 6 is a plastic or aluminum rod with a square or trapezoidal cross-section and is flexible. Two of the four insert rods 6 are respectively inserted into the two sleeves provided on the main zipper 4 and placed in their respective main zipper clamping openings 12 on the two opening frames 1. The other two insert rods 6 are respectively inserted into the sleeves provided on the two zipper pulls 5 and placed in their respective zipper pull clamping openings 13 on the two opening frames 1. The sleeves on the main zipper 4 and the zipper pulls 5 are flexible fabric sleeves, which can be sewn to the corresponding zipper straps or integrally formed. The casing clamping opening 11, the main zipper clamping opening 12, and the zipper clamping opening 13 all extend along the length of the clamping strip. The insert rod 6 and the sleeve extend along the length of the clamping strip.

[0030] Example 1:

[0031] like Figures 1 to 4 As shown, the outer plate 111 of the box shell clamping opening 11 of this utility model has a concave surface with a boss 112a on its inner side wall. The opening shell plates 21 of the upper box shell 2 and the lower box shell 3 each have a flat locking strip 22a on the side with an inner step 201, and there is a gap between the end of the flat locking strip 22a and the inner step 201. The flat locking strip 22a is fixed to the opening shell plate 21. The flat locking strip 22a is made of rubber. The opening shell plate 21 with the flat locking strip 22a can be embedded into the box shell clamping opening 11 with a boss 112a and a concave surface, and the gap between the opening shell plate 21 and the inner side wall of the outer plate 111 of the box shell clamping opening 11 can be filled by the flat locking strip 22a. The shoulder of the left shoulder 101 of the box shell clamping opening 11 can abut against the end of the flat locking strip 22a.

[0032] Example 2:

[0033] like Figure 1 , Figures 5 to 7As shown, the outer plate 111 of the housing clamping opening 11 of this utility model has a concave surface with a groove 112b on its inner sidewall. The opening shell plate 21 of the upper housing 2 and the lower housing 3 has a hook-shaped locking strip 22b on the side with the inner step 201, and there is a gap between the end of the hook-shaped locking strip 22b and the inner step 201. The flat locking strip 22b is fixed to the opening shell plate 21. The hook-shaped locking strip 22b is made of rubber. The opening shell plate 21 of 22b can be embedded into the box shell clamping opening 11 with a groove 112b and an inner concave surface, and the gap between the opening shell plate 21 and the inner side wall of the outer piece 111 of the box shell clamping opening 11 can be filled by the hook-shaped clip 22b. The hook head 221b of the hook-shaped clip 22b can be embedded into the groove 112b on the inner side wall of the box shell clamping opening 11, and the shoulder of the left shoulder 101 of the box shell clamping opening 11 can abut against the end of the hook-shaped clip 22b.

[0034] Example 3:

[0035] This embodiment is not illustrated, but can be referred to. Figures 1 to 4 ,Will Figure 4 The flat clip 22a is removed and replaced with subsequently injected expanding foam. The outer plate 111 of the box shell clamping opening 11 of this utility model has a concave surface with a protrusion 112a on its inner side wall. The opening shell plates 21 of the upper box shell 2 and the lower box shell 3 can be embedded into the box shell clamping opening 11 with the protrusion 112a and the concave surface, and the gap between the opening shell plate 21 and the inner side wall of the outer plate 111 of the box shell clamping opening 11 can be filled with expanding foam.

[0036] The installation method of the luggage opening frame structure that can be quickly connected to the box shell according to this utility model is as follows:

[0037] According to Embodiments 1 and 2 of a luggage opening frame structure that allows for quick connection of the luggage shell, with flat retaining strips 22a or hook-shaped retaining strips 22b provided on the opening shell plates 21 of the upper and lower boxes, the installation method of the luggage opening frame structure that allows for quick connection of the luggage shell includes the following steps:

[0038] Step 1 involves installing the main zipper 4, the liner 5, and the curved frame 1, which includes the following steps:

[0039] Step s1, embed the main zipper 4 and the liner 5, flatten the sleeves of the main zipper 4 and the liner 5 and embed them into the corresponding main zipper clamping opening 12 and liner clamping opening 13 on the clamping strip used for the unbent two-piece frame 1.

[0040] Step s2, install the insert rods 6, and insert the four insert rods 6 into the sleeves of the main zipper 4 embedded in the main zipper clamping port 12 and the sleeves of the zipper 5 in the zipper clamping port 13.

[0041] Step s3, bend frame 1, bend the two clamping strips into two frame 1;

[0042] Step 2 involves connecting the housing, which includes the following steps:

[0043] Step s1: Adhesive strips are attached by attaching flat strips 22a or hook strips 22b to the corresponding opening shell plates 21 of the upper shell 2 and the lower shell 3.

[0044] Step s2, connect the box shell. First, use external force to pry the outer piece 111 of the box shell clamping opening 11 laterally so that the opening of the box shell clamping opening 11 opens elastically. Press the opening shell plates 21 of the upper box shell 2 and the lower box shell 3 with flat clips 22a or hook clips 22b into the box shell clamping opening 11 of the corresponding opening frame 1. Release the external force applied laterally to the opening shell plates 21 so that the outer piece 111 of the box shell clamping opening 11 elastically returns to its original shape under its own elastic force and the left shoulder 101 of the box shell clamping opening 11 is inserted into the gap between the end of the flat clips 22a or hook clips 22b and the inner step 201.

[0045] In Embodiment 3 of a luggage opening frame structure that allows for quick connection of the luggage shell, in a state where flat retaining strips 22a or hook retaining strips 22b are not provided on the opening shell plates 21 of the upper and lower shells 2 and expansion foam is injected, the installation method of the luggage opening frame structure that allows for quick connection of the luggage shell includes the following steps:

[0046] Step 1 is exactly the same as Step 1 of the installation method above with the flat clip 22a or hook clip 22b provided;

[0047] Step 2: Connect the shell. First, use external force to pry the outer piece 111 of the shell clamping opening 11 laterally to make the opening of the shell clamping opening 11 elastically open. Press the shell plates 21 of the upper shell 2 and the lower shell 3 into the shell clamping opening 11 of the corresponding frame 1. Release the external force applied laterally to the shell plate 21 so that the outer piece 111 of the shell clamping opening 11 elastically returns to its original shape under its own elastic force. Inject expanding foam into the gap between the shell plates 21 of the upper shell 2 and the lower shell 3 and the inner wall of the outer piece 111 of the corresponding shell clamping opening 11 to fill the gap.

[0048] After connecting the two opening frames 1 to the opening shell plates 21 of the upper shell 2 and the lower shell 3 respectively using the above different installation methods, a hinge can be set on a corresponding frame edge between the two opening frames 1 for mutual hinge connection, so that the upper shell 2 can be flipped upward and opened.

[0049] The present invention discloses a luggage frame structure for quick connection of the luggage shell. A flexible luggage shell clamping opening 11 is provided on the clamping strip of the bent frame 1. A left shoulder 101 and a right shoulder 102 are provided opposite to each other at the opening of the clamping opening 11 to narrow the opening. The opening shell plate 21 of the luggage shell is misaligned to form an inner step 201 and an outer step 202. The misaligned opening shell plate 21 can be embedded into the luggage shell clamping opening 11 of the frame 1. One side of the plate can fit against one side of the groove wall of the luggage shell clamping opening 11, and its outer step 202 abuts against the shoulder of the right shoulder 102. A gap is provided between the other side of the plate and the other side of the groove wall of the luggage shell clamping opening 11, and a filler is provided in the gap. The filler can be a flat clip 22a, a hook clip 22b, or expanding foam. This invention utilizes flat clips 22a or hook clips 22b or injected expanding foam to fill the gap between the opening shell plate 21 and the inner wall of the outer piece 111 of the case shell clamping opening 11, thereby preventing the opening shell plate 21 of the case shell from coming out of the case shell clamping opening 11. This enables quick connection between the case shell and the opening frame, improving work efficiency and reducing the risk of the case shell easily falling off and affecting the service life of the suitcase.

[0050] The above are only three specific embodiments of this utility model, but the design concept of this utility model is not limited thereto. Any non-substantial modifications made to this utility model using this concept shall be considered as an infringement of the protection scope of this utility model.

Claims

1. A luggage opening frame structure that can be quickly connected to the luggage shell, the opening frame structure being connectable to the opening of the luggage shell and for installing a main zipper (4) and a zipper chain (5), the luggage shell comprising an upper shell (2) and a lower shell (3) arranged opposite to each other, characterized in that: The system includes two frame pieces (1), which are symmetrically arranged between the upper shell (2) and the lower shell (3). Each frame piece (1) is formed by bending a clamping strip. The clamping strip has a shell clamping opening (11), and one side of the shell clamping opening (11) is elastic. The shell clamping opening (11) is a flat groove, and a left shoulder (101) and a right shoulder (102) are provided at the opening of the groove. The left shoulder (101) and the right shoulder (102) are arranged opposite each other and staggered vertically to narrow the opening of the shell clamping opening (11). The upper shell (2) and the lower shell (3) each have a shell plate at their respective openings. (21) The inner step (201) and outer step (202) are formed by misalignment with the respective side shell plates of the box shell. The opening shell plates (21) of the upper box shell (2) and the lower box shell (3) can be respectively embedded into the box shell clamping opening (11) of the two opening frames (1). One side of the misaligned opening shell plate (21) can fit against the side groove wall of the box shell clamping opening (11) and its outer step (202) abuts against the shoulder of the right shoulder (102) of the box shell clamping opening (11). There is a gap between the other side of the misaligned opening shell plate (21) and the other side groove wall of the box shell clamping opening (11) and there is a filler in the gap.

2. The luggage opening frame structure for quick connection to the case shell according to claim 1, characterized in that: The clamping strip used for bending the frame (1) is a bendable flat strip component. Its cross-section is in the form of multiple segments stacked back and forth to form multiple clamping openings. Each clamping opening has an opening that communicates with the outside. The multiple clamping openings include a box shell clamping opening (11) arranged on the left side of the clamping strip and a main zipper clamping opening (12) and a zipper clamping opening (13) arranged from left to right. The piece on the left side of the box shell clamping opening (11) is the outer piece (111) of the box shell clamping opening (11).

3. The luggage opening frame structure for quick connection to the case shell according to claim 2, characterized in that: The opening direction of the box shell clamping port (11) is opposite to the opening direction of the main zipper clamping port (12), and the opening directions of the box shell clamping ports (11) of the two-piece frame (1) are set in opposite directions.

4. The luggage opening frame structure for quick connection to the case shell according to claim 3, characterized in that: The outer piece (111) of the box shell clamping opening (11) is elastic, and the outer piece (111) can be elastically deformed under the lateral external force to make the opening of the box shell clamping opening (11) elastically open, and the outer piece (111) of the box shell clamping opening (11) can return to its original state after the lateral external force is released.

5. A luggage opening frame structure for quick connection to the case shell according to claim 4, characterized in that: The inner wall of the outer piece (111) of the box shell clamping opening (11) is provided with a concave surface with a boss (112a). The opening shell plates (21) of the upper box shell (2) and the lower box shell (3) are provided with flat locking strips (22a) on the side with inner steps (201), and there is a gap between the end of the flat locking strips (22a) and the inner steps (201). The opening shell plate (21) with flat locking strips (22a) can be embedded into the box shell clamping opening (11) with a boss (112a) and a concave surface, and the gap between the opening shell plate (21) and the inner wall of the outer piece (111) of the box shell clamping opening (11) can be filled by the flat locking strips (22a). The shoulder of the left shoulder (101) of the box shell clamping opening (11) can abut against the end of the flat locking strips (22a).

6. A luggage opening frame structure for quick connection to the case shell according to claim 4, characterized in that: The outer plate (111) of the box shell clamping opening (11) has an inner concave surface with a groove (112b) on its inner sidewall. The opening shell plates (21) of the upper box shell (2) and the lower box shell (3) have hook-shaped retaining strips (22b) on the side with the inner step (201), and there is a gap between the end of the hook-shaped retaining strips (22b) and the inner step (201). The opening shell plate (21) with the hook-shaped retaining strips (22b) can be embedded into the grooved (112b) of the box shell clamping opening (112b). 2b) and the concave box shell clamping opening (11) and the gap between the opening shell plate (21) and the inner wall of the outer piece (111) of the box shell clamping opening (11) can be filled by the hook-shaped clip (22b). The hook head (221b) of the hook-shaped clip (22b) can be embedded into the groove (112b) on the inner wall of the box shell clamping opening (11). The shoulder of the left shoulder (101) of the box shell clamping opening (11) can abut against the end of the hook-shaped clip (22b).

7. A luggage opening frame structure for quick connection to the case shell according to claim 4, characterized in that: The inner wall of the outer piece (111) of the box shell clamping opening (11) is provided with a concave surface with a boss (112a). The opening shell plates (21) of the upper box shell (2) and the lower box shell (3) can be embedded into the box shell clamping opening (11) provided with a boss (112a) and a concave surface, and the gap between the opening shell plate (21) and the inner wall of the outer piece (111) of the box shell clamping opening (11) can be filled with expanding foam.

8. A luggage opening frame structure for quick connection to the case shell according to claim 2, characterized in that: It also includes insert rods (6), which are set as four pieces. Two of the four insert rods (6) are respectively inserted into the two sleeves set on the main zipper (4) and respectively placed in the corresponding main zipper clamping openings (12) on the two opening frames (1). The other two of the four insert rods (6) are respectively inserted into the sleeves set on the two inner zippers (5) and respectively placed in the corresponding inner zipper clamping openings (13) on the two opening frames (1).

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