Suitcase nail-free frame and fixing structure

Abstract

The utility model discloses a travel suitcase nail-free frame and fixing structure, which comprises a first case shell, a second case shell, a first frame and a second frame, the main body of the first frame is arranged at the opening of the first case shell, and the opening of the first frame and the opening of the first case shell are both provided with an inverted buckle structure. The first frame is clamped and fixed with the inverted buckle structure of the opening part of the first box shell, and the inverted buckle structure of the first frame is engaged with the inverted buckle structure of the opening part of the first box shell; a main body of the second frame is arranged at the opening of the second box shell, the opening of the second frame and the opening of the second box shell are each provided with an inverted buckle structure, the second frame and the inverted buckle structure of the opening of the second box shell are clamped and fixed, and the inverted buckle structure of the second frame and the inverted buckle structure of the opening of the second box shell are meshed with each other; and the first frame and the second frame are buckled with each other to form a closed inner space of the box body.

Description

Technical Field

[0001] The utility model relates to the technical field of travel cases, in particular to a nail-free frame and a fixing structure of a travel case. Background Art

[0002] In the currently commonly used suitcases, a set of concave and convex frames are generally provided on the opening edges of the case shells on the front and rear sides. The purpose is, on the one hand, to increase the use strength of the suitcase, and on the other hand, to improve the matching and tightness of the case shells on both sides when the suitcase is closed, so as to facilitate user use.

[0003] The existing technology uses rivets to fix the bent frame to the opening of the box shell. The fixing method is simple in principle and is currently the most widely used in the industry. However, it is easy to cause inconvenience in operation and low production efficiency in actual production and use. At the same time, the use of rivets for riveting requires rivet holes, and multiple hole fixing points must be set, resulting in more binding steps and more pre-processing steps. And when overlapping holes are set at the overlapping positions of splicing, misalignment often occurs and requires manual correction, and the operability is not high. At the same time, the riveting of rivets requires the operator to lift the rivet operating machine on the box. When the size of the box is large, the convenience of its production operation is very low, and the workers are very easy to fatigue, which affects the production efficiency and safety of production. Because there are a large number of rivets, the production efficiency is low, which increases the production cost of the product.

[0004] The structural strength between the two rivets is weak and gaps are prone to appear. Even if the rivets are arranged densely in the rivet fixing structure, there will always be a certain distance between adjacent rivets. This distance is not completely fixed, and its structural strength is low. The overall fixing strength is not ideal. When local collision and deformation occur, it is very easy for the frame and the box shell to separate, resulting in gaps, which affects the appearance and brings a bad product experience to users.

[0005] A large number of exposed rivets affect the appearance of the suitcase. If rivets are used for fixing, the rivets will be exposed on the outside of the frame, and the number of rivets is large, which further affects the overall appearance of the suitcase.

[0006] The solution of the utility model is to improve the frame fixing structure of the existing suitcase in view of the above-mentioned problem. Utility Model Content

[0007] In order to overcome the deficiencies in the prior art, the utility model provides a nail-free frame and fixing structure for a suitcase, the use of which can effectively increase the assembly efficiency of the frame and the case shell, improve the stable connection between the frame and the case shell, and at the same time improve the overall aesthetics of the suitcase.

[0008] In order to achieve the above utility model purpose, the technical solution adopted to solve its technical problems is as follows:

[0009] A nail-free frame and fixing structure of a travel case, comprising a first case shell, a second case shell, a first frame, and a second frame, wherein:

[0010] The main body of the first frame is arranged at the mouth of the first box shell, and both the first frame and the mouth of the first box shell are provided with an inverted structure, the first frame is fixedly connected with the inverted structure of the mouth of the first box shell, and the inverted structure of the first frame and the inverted structure of the mouth of the first box shell are engaged with each other;

[0011] The main body of the second frame is arranged at the mouth of the second box shell, and both the second frame and the mouth of the second box shell are provided with an inverted structure, the second frame is fixedly connected with the inverted structure of the mouth of the second box shell, and the inverted structure of the second frame and the inverted structure of the mouth of the second box shell are engaged with each other;

[0012] The first frame and the second frame are buckled together to form a closed internal space of the box.

[0013] Further, the first box shell includes a first box shell body and a first box shell undercut portion, wherein:

[0014] One end of the first housing body close to the first frame is bent inwardly to form an undercut portion of the first housing inside the opening of the first housing;

[0015] The first box shell body and the first box shell undercut portion are fixedly connected by a first U-shaped connecting piece; and / or,

[0016] The first box shell body and the first box shell undercut portion are fixedly connected by external fasteners or sewing to fix the first box shell body on one side close to the second box shell and the first box shell undercut portion on one side close to the second box shell.

[0017] Furthermore, the second box shell includes a second box shell body and a second box shell undercut portion, wherein:

[0018] One end of the second housing body close to the second frame is bent inwardly to form an undercut portion of the second housing inside the opening of the second housing;

[0019] The second box shell body and the second box shell undercut portion are fixedly connected by a second U-shaped connecting piece; and / or,

[0020] The second box shell body and the second box shell undercut portion are fixedly connected by external fasteners or sewing to fix the second box shell body close to the first box shell side and the second box shell undercut portion close to the second box shell side.

[0021] Furthermore, it also includes a first adhesive strip and a second adhesive strip, wherein:

[0022] The first rubber strip includes a first rubber strip extension portion, a first rubber strip vertical portion and a first rubber strip clamping portion, wherein the first rubber strip extension portion abuts against the first box shell undercut portion to prevent the first box shell undercut portion having a certain elasticity from rebounding, thereby enhancing the clamping strength between the first frame and the first box shell and reducing the risk of separation between the first frame and the first box shell;

[0023] The second rubber strip includes a second rubber strip extension portion, a second rubber strip vertical portion and a second rubber strip clamping portion. The second rubber strip extension portion abuts against the second box shell undercut portion to prevent the second box shell undercut portion having a certain elasticity from rebounding, thereby enhancing the clamping strength between the second frame and the second box shell and reducing the risk of detachment between the second frame and the second box shell.

[0024] Furthermore, it also includes a suitcase lining, which is arranged between the first case shell body and the first rubber strip extension part, and correspondingly arranged between the second case shell body and the second rubber strip extension part; or, in the case where the first rubber strip extension part and the first rubber strip vertical part are not set, the suitcase lining is directly fixedly connected to the first rubber strip clamping part, and correspondingly in the case where the second rubber strip extension part and the second rubber strip vertical part are not set, the suitcase lining is directly fixedly connected to the second rubber strip clamping part.

[0025] Further, a first frame undercut portion is provided on the inner wall of the inner opening of the first frame, and the first frame undercut portion abuts against the end of the first box shell undercut portion; and / or,

[0026] A second frame undercut portion is provided on the inner wall of the inner opening of the second frame, and the second frame undercut portion abuts against the end of the second box shell undercut portion.

[0027] Further, a first frame assembly groove is provided on the upper portion of the first frame, and the opening height of the first frame assembly groove is smaller than the left and right width of the upper surface of the first frame, so as to prevent the bending shape of the first box shell opening from tilting in the first frame assembly groove; and / or,

[0028] A second frame assembly groove is provided on the upper portion of the second frame, and an opening height of the second frame assembly groove is smaller than the left and right widths of the upper surface of the second frame, so as to prevent the bending shape of the second box shell opening from tilting in the second frame assembly groove.

[0029] Furthermore, a first frame outer groove is provided at a lower portion of a side of the first frame facing the second frame, and a second frame outer protrusion is provided at a lower portion of a side of the second frame facing the first frame, and the first frame outer groove and the second frame outer protrusion are matched.

[0030] Furthermore, it also includes a soft rubber strip, which is arranged at the opening edge of the second frame and located between the first frame and the second frame. When the suitcase is closed, the soft rubber strip plays a buffering role to avoid direct collision between the first frame and the second frame to generate noise or impact damage, and at the same time plays a sealing role for the gap between the first frame and the second frame after they are embedded.

[0031] Furthermore, a first frame outer zipper installation groove is provided at a lower portion of a side of the first frame facing the second frame, and a second frame outer zipper installation groove is provided at a lower portion of a side of the second frame facing the first frame. Positions of the first frame outer zipper installation groove and the second frame outer zipper installation groove correspond to each other and are respectively used to install left and right chain belts of the zipper so that the first frame and the second frame are closed to form an enclosed space of the box.

[0032] Furthermore, the first frame and the second frame are formed by bending profiles, and hinge structures are respectively provided at the bending interfaces for connection. The hinge structures are respectively installed on the outsides of the first box shell and the second box shell. At the bending interfaces, the first frame, the first box shell and the hinge structure are fixed by rivets, and the second frame, the second box shell and the hinge structure are also fixed by rivets.

[0033] Due to the adoption of the above technical solution, the utility model has the following advantages and positive effects compared with the prior art:

[0034] 1. The utility model provides a nail-free frame and fixing structure for a travel case, wherein the extended portion of the rubber strip abuts against the undercut portion of the case shell, which can prevent the undercut portion of the case shell having a certain elasticity from rebounding, thereby enhancing the clamping strength between the frame and the case shell and reducing the risk of separation between the frame and the case shell;

[0035] 2. The utility model provides a nail-free frame and fixing structure for a suitcase. After installation, the frame and the case shell have undercuts that fit tightly together, effectively ensuring a stable connection between the frame and the case shell. Rivets or other methods are no longer needed for connection, thereby improving the overall aesthetics and assembly efficiency of the suitcase.

[0036] 3. The utility model provides a nail-free frame and fixing structure for a suitcase. When the suitcase is closed, the soft rubber strip plays a buffering role to avoid direct collision between the first frame and the second frame to generate noise or impact damage, and at the same time plays a sealing role for the gap between the first frame and the second frame after being fitted together.

[0037] 4. The utility model provides a nail-free frame and fixing structure for a suitcase, wherein the opening height of the frame assembly groove is smaller than the left and right width of the upper surface of the frame, so as to prevent the bending shape of the case shell opening from tilting in the frame assembly groove.

[0038] 5. The utility model provides a nail-free frame and fixing structure for a suitcase, which has reasonable structure, ingenious design, convenient operation, high production efficiency, strong stability and low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0040] Figure 1 It is a schematic structural diagram of a suitcase without nails frame and a fixing structure of the utility model when the suitcase adopts a nail-free frame;

[0041] Figure 2 It is a schematic diagram of the cross-sectional structure of a suitcase without nails frame and a fixing structure of the utility model when the suitcase adopts a without nails frame;

[0042] Figure 3 It is a schematic diagram of the principle of installing a nail-free frame structure in a travel case and a nail-free frame structure in a fixed structure of the utility model;

[0043] Figure 4 It is a partially enlarged schematic cross-sectional view of a suitcase with a nail-free frame and a fixing structure in the utility model when the suitcase adopts a nail-free frame;

[0044] Figure 5 It is another functional schematic diagram of a nail-free frame of a suitcase and an internal structure of the nail-free frame in a fixed structure of the utility model;

[0045] Figure 6 It is a structural schematic diagram of a nail-free frame of a suitcase and a first frame in a fixing structure of the utility model;

[0046] Figure 7 It is a structural schematic diagram of a nail-free frame of a suitcase and a second frame in a fixed structure of the utility model;

[0047] Figure 8 It is a structural schematic diagram of a first box shell in a nail-free frame and a fixing structure of a travel case of the utility model;

[0048] Fig. 9 It is a structural schematic diagram of a second box shell in a nail-free frame and a fixing structure of a travel case of the utility model;

[0049] Fig.10 It is a schematic diagram of the assembly of a first box shell (using external fasteners) and a first frame in a nail-free frame and a fixing structure of a suitcase of the utility model;

[0050] Fig.11 It is a schematic diagram of the assembly completion of the first box shell (using external fasteners) and the first frame in a nail-free frame and fixing structure of a suitcase of the utility model;

[0051] Fig.12 It is a schematic diagram of the assembly completion of the first box shell (using the first U-shaped connecting piece) and the first frame in the nail-free frame and the fixing structure of the suitcase of the utility model;

[0052] Fig.13 It is a schematic diagram of the assembly of the second box shell (using the second U-shaped connecting piece) and the second frame in a nail-free frame and a fixing structure of a suitcase of the utility model;

[0053] Fig.14 This is a nail-free frame and fixing structure of a suitcase in the utility model;

[0054] Fig.15 It is a schematic diagram of the assembly process of the first box shell (using the first U-shaped connecting piece) and the first frame in a nail-free frame and a fixing structure of a suitcase of the utility model;

[0055] Fig.16 It is a schematic diagram of the assembly process of the first box shell (using external fasteners) and the first frame in a nail-free frame and a fixing structure of a suitcase of the utility model;

[0056] Fig.17 The utility model discloses a nail-free frame and a fixing structure of a travel case in which an extension part of a case shell is bent inwards to form a circle of inverted buckle structure.

[0057]

Explanation of main symbols

[0058] 1-first box shell; 11-first box shell body; 12-first box shell undercut portion; 13-first U-shaped connecting piece;

[0059] 2-second box shell; 21-second box shell body; 22-second box shell undercut portion; 23-second U-shaped connecting piece;

[0060] 3-first frame; 31-undercut portion of first frame; 32-inner groove of first frame; 33-outer groove of first frame; 34-assembly groove of first frame; 35-outer zipper installation groove of first frame;

[0061] 4-second frame; 41-undercut portion of the second frame; 42-inner groove of the second frame; 43-outer protrusion of the second frame; 44-assembly groove of the second frame; 45-upper groove of the outer protrusion; 46-outer zipper installation groove of the second frame;

[0062] 5-soft rubber strip; 51-lower extension of the soft rubber strip;

[0063] 6-first rubber strip; 61-first rubber strip extension portion; 62-first rubber strip vertical portion; 63-first rubber strip clamping portion;

[0064] 7- Suitcase lining;

[0065] 8-second rubber strip; 81-second rubber strip extension portion; 82-second rubber strip vertical portion; 83-second rubber strip clamping portion;

[0066] 9- Zipper;

[0067] 10-External fasteners. DETAILED DESCRIPTION

[0068] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0069] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0070] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] like Figure 1-17 As shown, this embodiment discloses a nail-free frame and fixing structure of a suitcase, comprising a first case shell 1, a second case shell 2, a first frame 3, and a second frame 4, wherein:

[0072] The main body of the first frame 3 is arranged at the mouth of the first box shell 1, and both the first frame 3 and the mouth of the first box shell 1 are provided with an inverted structure, and the first frame 3 is fixedly connected with the inverted structure of the mouth of the first box shell 1 by clamping, and the inverted structure of the first frame 3 and the inverted structure of the mouth of the first box shell 1 are engaged with each other;

[0073] The main body of the second frame 4 is arranged at the mouth of the second box shell 2, and both the second frame 4 and the mouth of the second box shell 2 are provided with an inverted structure, and the second frame 4 is fixedly connected with the inverted structure of the mouth of the second box shell 2 by clamping, and the inverted structure of the second frame 4 and the inverted structure of the mouth of the second box shell 2 are engaged with each other;

[0074] The first frame 3 and the second frame 4 are buckled together to form a closed internal space of the box.

[0075] Furthermore, the first box shell 1 includes a first box shell body 11 and a first box shell undercut portion 12, wherein:

[0076] One end of the first housing body 11 close to the first frame 3 is bent inwardly to form the first housing undercut portion 12 at the inner side of the opening of the first housing 1;

[0077] The first box shell body 11 and the first box shell undercut portion 12 are fixedly connected by a first U-shaped connecting piece 13; and / or,

[0078] The first box shell body 11 and the first box shell undercut part 12 are fixedly connected by an external fastener 10 or sewing method to the side of the first box shell body 11 close to the second box shell 2 and the side of the first box shell undercut part 12 close to the second box shell 2. In this embodiment, the first box shell undercut part 12 has a certain elasticity, which can make the opening of the first frame 3 be smoothly snapped onto the first box shell undercut part 12. The size of the opening of one side of the first frame 3 can be customized according to the size of the corresponding first box shell undercut part 12 to adapt to different box shell thicknesses and processing conditions, and meet the structural strength of the mutually engaged bayonet for different product sizes. In the process of assembling with the opening of the first frame 3, it is necessary to apply a little force to the first frame 3 so that the undercut of the first box shell undercut part 12 is slightly deformed, so that the bayonet of the first frame 3 slides over the highest point of the undercut of the mouth of the first box shell 1, forming a mutually engaged state, at which time the first frame 3 is fixed by the bayonet at the mouth of the first box shell 1 and cannot be disengaged.

[0079] In addition, the thickness of the first box shell undercut portion 12 should be greater than the opening and internal width of the first frame 3, so that after the first frame 3 and the first box shell 1 are assembled with the opening bent inward, the end of the first box shell undercut portion 12 can fully clamp the step of the opening edge of the first frame 3 to form a mutually interlocking tight-fitting structure, so that there is no gap between the outside of the first box shell 1 and the edge of the first frame 3.

[0080] Furthermore, the second housing 2 comprises a second housing body 21 and a second housing undercut portion 22, wherein:

[0081] One end of the second housing body 21 close to the second frame 4 is bent inwardly to form the second housing undercut portion 22 at the inner side of the opening of the second housing 2;

[0082] The second box shell body 21 and the second box shell undercut portion 22 are fixedly connected by a second U-shaped connecting piece 23; and / or,

[0083] The second box shell body 21 and the second box shell undercut part 22 are fixedly connected by an external fastener 10 or sewing method to the second box shell body 21 near the first box shell 1 and the second box shell undercut part 22 near the second box shell 2. In this embodiment, the second box shell undercut part 22 has a certain elasticity, which can make the opening of the second frame 4 be smoothly snapped onto the second box shell undercut part 22. The size of the opening of one side of the second frame 4 can be customized according to the size of the corresponding second box shell undercut part 22 to adapt to different box shell thicknesses and processing conditions, and meet the structural strength of the bayonet that engages with each other for different product sizes. In the process of assembling with the opening of the second frame 4, it is necessary to apply a little force to the second frame 4 so that the undercut of the second box shell undercut part 22 is slightly deformed, so that the bayonet of the second frame 4 slides over the highest point of the undercut of the mouth of the second box shell 2, forming a mutually snapped state, at which time the second frame 4 is fixed by the bayonet at the mouth of the second box shell 2 and cannot be disengaged.

[0084] In addition, the thickness of the second box shell undercut portion 22 should be greater than the opening and internal width of the second frame 4, so that after the second frame 4 and the second box shell 2 are assembled with the opening bent inward, the end of the second box shell undercut portion 22 can fully clamp the step of the opening edge of the second frame 4 to form a tight-fitting structure that interlocks with each other, so that there is no gap between the outside of the second box shell 2 and the edge of the second frame 4.

[0085] In a preferred embodiment, the first box shell body 11, the first U-shaped connector 13 and the first box shell undercut portion 12 are integrally formed; and / or the second box shell body 21, the second U-shaped connector 23 and the second box shell undercut portion 22 are integrally formed.

[0086] Furthermore, the nail-free frame fixing structure further includes a first rubber strip 6 and a second rubber strip 8, wherein:

[0087] The first rubber strip 6 includes a first rubber strip extension portion 61, a first rubber strip vertical portion 62 and a first rubber strip clamping portion 63. The first rubber strip extension portion 61 abuts against the first case shell undercut portion 12 to prevent the first case shell undercut portion 12 having a certain elasticity from rebounding, thereby enhancing the clamping strength between the first frame 3 and the first case shell 1 and reducing the risk of separation between the first frame 3 and the first case shell 1. In this embodiment, a continuous or segmented first rubber strip clamping portion 63 can be inserted into the first frame inner groove 32 provided on the first frame 3. The first rubber strip clamping portion 63 extends to the first case shell undercut portion 12 through the first rubber strip vertical portion 62 and the first rubber strip extension portion 61.

[0088] The second rubber strip 8 includes a second rubber strip extension portion 81, a second rubber strip vertical portion 82, and a second rubber strip clamping portion 83. The second rubber strip extension portion 81 abuts against the second case shell undercut portion 22 to prevent the second case shell undercut portion 22 having a certain elasticity from rebounding, thereby enhancing the clamping strength between the second frame 4 and the second case shell 2 and reducing the risk of separation between the second frame 4 and the second case shell 2. In this embodiment, a continuous or segmented second rubber strip clamping portion 83 can be inserted into the second frame inner groove 42 provided on the second frame 4. The second rubber strip clamping portion 83 extends to the second case shell undercut portion 22 through the second rubber strip vertical portion 82 and the second rubber strip extension portion 81.

[0089] In a preferred embodiment, the first rubber strip extending portion 61, the first rubber strip vertical portion 62 and the first rubber strip clamping portion 63 are integrally formed; and / or the second rubber strip extending portion 81, the second rubber strip vertical portion 82 and the second rubber strip clamping portion 83 are integrally formed.

[0090] Furthermore, the nail-free frame fixing structure also includes a suitcase lining 7, and the suitcase lining 7 is arranged between the first box shell body 11 and the first rubber strip extension part 61, and is correspondingly arranged between the second box shell body 21 and the second rubber strip extension part 81; or, in the case where the first rubber strip extension part 61 and the first rubber strip vertical part 62 are not set, the suitcase lining 7 is directly fixedly connected to the first rubber strip clamping part 63, and correspondingly in the case where the second rubber strip extension part 81 and the second rubber strip vertical part 82 are not set, the suitcase lining 7 is directly fixedly connected to the second rubber strip clamping part 83.

[0091] Further, a first frame undercut portion 31 is provided on the inner wall of the inner opening of the first frame 3, and the first frame undercut portion 31 abuts against the end of the first box shell undercut portion 12; and / or,

[0092] A second frame undercut portion 41 is disposed on the inner wall of the inner opening of the second frame 4 , and the second frame undercut portion 41 abuts against the end of the second box shell undercut portion 22 .

[0093] Further, a first frame assembly groove 34 is provided on the upper portion of the first frame 3, and the opening height of the first frame assembly groove 34 is smaller than the left and right width of the upper surface of the first frame 3, so as to prevent the bending shape of the opening of the first box shell 1 from tilting in the first frame assembly groove 34; and / or,

[0094] A second frame assembly groove 44 is opened on the upper part of the second frame 4, and the opening height of the second frame assembly groove 44 is smaller than the left and right width of the upper surface of the second frame 4, which is used to prevent the bending shape of the mouth of the second box shell 2 from tilting in the second frame assembly groove 44.

[0095] In one embodiment, a first frame outer groove 33 is provided at the lower portion of the first frame 3 facing the second frame 4, and a second frame outer protrusion 43 is provided at the lower portion of the second frame 4 facing the first frame 3. The first frame outer groove 33 and the second frame outer protrusion 43 are adapted to each other.

[0096] In another embodiment, a first frame outer zipper mounting groove 35 is provided at the lower portion of the first frame 3 facing the second frame 4, and a second frame outer zipper mounting groove 46 is provided at the lower portion of the second frame 4 facing the first frame 3. Positions of the first frame outer zipper mounting groove 35 and the second frame outer zipper mounting groove 46 correspond to each other and are respectively used to install the left and right chain belts of the zipper 9 so that the first frame 3 and the second frame 4 are closed to form an enclosed space of the box.

[0097] Furthermore, the nail-free frame fixing structure also includes a soft rubber strip 5, which is arranged at the opening edge of the second frame 4 and between the first frame 3 and the second frame 4, and is used for the soft rubber strip 5 to play a buffering role when the suitcase is closed, thereby avoiding the first frame 3 and the second frame 4 from directly colliding and generating noise or impact damage, and at the same time, sealing the gap between the first frame 3 and the second frame 4 after being fitted. Specifically, a soft rubber strip lower side extension 51 is provided on the lower side of the soft rubber strip 5, and an outer protrusion upper groove 45 is provided on the upper part of the outer protrusion 43 of the second frame, and the soft rubber strip lower side extension 51 is embedded in the outer protrusion upper groove 45 to clamp and fix the second frame 4 and the soft rubber strip 5.

[0098] Furthermore, the first frame 3 and the second frame 4 are formed by bending profiles, and hinge structures are respectively provided at the bending interfaces for connection. The hinge structures are respectively installed on the outsides of the first box shell 1 and the second box shell 2. At the bending interfaces, the first frame 3, the first box shell 1 and the hinge structure are fixed by rivets, and the second frame 4, the second box shell 2 and the hinge structure are also fixed by rivets.

[0099] As a preferred solution, the first box shell 1 and the second box shell 2 form a circle of inverted structures around the mouth of the first box shell 1 and the second box shell 2, respectively. However, at the four corners of the box shell mouth, the rounded corners need to smoothly transition to match the rounded corners of the frame, and snap together. Therefore, the first box shell inverted portion 12 and the second box shell inverted portion 22 need to be split into multiple sections at the corners of the box shell mouth. If a luggage lock is provided at the box shell mouth, the corresponding box shell is provided with a groove set for the luggage lock, and the transition rounded corners on both sides of the groove also need to be disconnected in multiple sections, such as Fig.17 When the lock on the box shell is not provided with a groove, the first box shell undercut portion 12 and the second box shell undercut portion 22 may not be disconnected in multiple sections at the lock position.

[0100] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A nail-free frame and fixing structure for a suitcase, characterized in that: It includes a first box shell, a second box shell, a first frame, and a second frame, wherein: The main body of the first frame is arranged at the mouth of the first box shell, and both the first frame and the mouth of the first box shell are provided with an inverted structure, the first frame is fixedly connected with the inverted structure of the mouth of the first box shell, and the inverted structure of the first frame and the inverted structure of the mouth of the first box shell are engaged with each other; The main body of the second frame is arranged at the mouth of the second box shell, and both the second frame and the mouth of the second box shell are provided with an inverted structure, the second frame is fixedly connected with the inverted structure of the mouth of the second box shell, and the inverted structure of the second frame and the inverted structure of the mouth of the second box shell are engaged with each other; The first frame and the second frame are buckled together to form a closed internal space of the box.

2. A nail-free frame and fixing structure for a suitcase according to claim 1, characterized in that: The first box shell comprises a first box shell body and a first box shell undercut portion, wherein: One end of the first housing body close to the first frame is bent inwardly to form an undercut portion of the first housing inside the opening of the first housing; The first box shell body and the first box shell undercut portion are fixedly connected by a first U-shaped connecting piece; and / or, The first box shell body and the first box shell undercut portion are fixedly connected by external fasteners or sewing to fix the first box shell body on one side close to the second box shell and the first box shell undercut portion on one side close to the second box shell.

3. A nail-free frame and fixing structure for a suitcase according to claim 2, characterized in that: The second box shell comprises a second box shell body and a second box shell undercut portion, wherein: One end of the second housing body close to the second frame is bent inwardly to form an undercut portion of the second housing inside the opening of the second housing; The second box shell body and the second box shell undercut portion are fixedly connected by a second U-shaped connecting piece; and / or, The second box shell body and the second box shell undercut portion are fixedly connected by external fasteners or sewing to fix the second box shell body close to the first box shell side and the second box shell undercut portion close to the second box shell side.

4. A nail-free frame and fixing structure for a suitcase according to claim 3, characterized in that: Also includes a first adhesive strip and a second adhesive strip, wherein: The first rubber strip includes a first rubber strip extension portion, a first rubber strip vertical portion and a first rubber strip clamping portion, wherein the first rubber strip extension portion abuts against the first box shell undercut portion to prevent the first box shell undercut portion having a certain elasticity from rebounding, thereby enhancing the clamping strength between the first frame and the first box shell and reducing the risk of separation between the first frame and the first box shell; The second rubber strip includes a second rubber strip extension portion, a second rubber strip vertical portion and a second rubber strip clamping portion. The second rubber strip extension portion abuts against the second box shell undercut portion to prevent the second box shell undercut portion having a certain elasticity from rebounding, thereby enhancing the clamping strength between the second frame and the second box shell and reducing the risk of detachment between the second frame and the second box shell.

5. A nail-free frame and fixing structure for a suitcase according to claim 4, characterized in that: It also includes a suitcase lining, which is arranged between the first case shell body and the first rubber strip extension part, and correspondingly arranged between the second case shell body and the second rubber strip extension part; or, in the case where the first rubber strip extension part and the first rubber strip vertical part are not set, the suitcase lining is directly fixedly connected to the first rubber strip clamping part, and correspondingly in the case where the second rubber strip extension part and the second rubber strip vertical part are not set, the suitcase lining is directly fixedly connected to the second rubber strip clamping part.

6. A nail-free frame and fixing structure for a suitcase according to claim 3, characterized in that: A first frame undercut portion is provided on the inner wall of the inner opening of the first frame, and the first frame undercut portion abuts against the end of the first box shell undercut portion; and / or, A second frame undercut portion is provided on the inner wall of the inner opening of the second frame, and the second frame undercut portion abuts against the end of the second box shell undercut portion.

7. A nail-free frame and fixing structure for a suitcase according to claim 1, characterized in that: A first frame assembly groove is provided on the upper portion of the first frame, and the opening height of the first frame assembly groove is smaller than the left and right widths of the upper surface of the first frame, so as to prevent the bending shape of the first box shell opening from tilting in the first frame assembly groove; and / or, A second frame assembly groove is provided on the upper portion of the second frame, and an opening height of the second frame assembly groove is smaller than the left and right widths of the upper surface of the second frame, so as to prevent the bending shape of the second box shell opening from tilting in the second frame assembly groove.

8. The nail-free frame and fixing structure of a suitcase according to claim 1, characterized in that: A first frame outer groove is provided at a lower portion of a side of the first frame facing the second frame, and a second frame outer protrusion is provided at a lower portion of a side of the second frame facing the first frame. The first frame outer groove is matched with the second frame outer protrusion.

9. The nail-free frame and fixing structure of a suitcase according to claim 1, characterized in that: It also includes a soft rubber strip, which is arranged at the opening edge of the second frame and located between the first frame and the second frame. When the suitcase is closed, the soft rubber strip plays a buffering role to avoid the first frame and the second frame from directly colliding and generating noise or impact damage, and at the same time plays a sealing role for the gap between the first frame and the second frame after they are fitted together.

10. The nail-free frame and fixing structure of a suitcase according to claim 1, characterized in that: A first frame outer zipper installation groove is provided at the lower part of the first frame side facing the second frame, and a second frame outer zipper installation groove is provided at the lower part of the second frame side facing the first frame. The positions of the first frame outer zipper installation groove and the second frame outer zipper installation groove correspond to each other and are respectively used to install the left and right chain belts of the zipper so that the first frame and the second frame are closed to form an enclosed space of the box.

11. A nail-free frame and fixing structure for a suitcase according to claim 1, characterized in that: The first frame and the second frame are formed by bending profiles, and hinge structures are respectively provided at the bending interfaces for connection. The hinge structures are respectively installed on the outsides of the first box shell and the second box shell. At the bending interfaces, the first frame, the first box shell and the hinge structure are fixed by rivets, and the second frame, the second box shell and the hinge structure are also fixed by rivets.

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