Suitcase opening buckling structure and middle frame rapid assembling structure

Abstract

The utility model discloses a travel suitcase opening buckling structure and a middle frame quick assembly structure, which comprise a first case shell, a second case shell, a first frame, a first frame embedding groove, a second frame and a second frame embedding boss, the first frame is arranged at the opening of the first case shell, and the second frame is arranged at the opening of the second case shell. Buckling structures are arranged at the opening parts of the first frame and the first box shell and are clamped and fixed, and the buckling structure of the first frame is engaged with the buckling structure of the opening part of the first box shell; the second frame is arranged at the opening part of the second box shell, buckling structures are arranged at the opening parts of the second frame and the second box shell and are clamped and fixed, and the buckling structures of the second frame and the buckling structures of the opening part of the second box shell are meshed with each other; the first frame embedding groove is formed in the middle of the first frame, and an opening of the first frame embedding groove faces the left side; the second frame embedding boss is arranged in the middle of the second frame and faces the right side; and the first frame embedding groove and the second frame embedding boss are embedded with each other, so that the first frame and the second frame are buckled with each other to form a closed box body internal space.

Description

TECHNICAL FIELD

[0001] The utility model relates to a travel suitcase technical field, especially a travel suitcase mouth part buckle structure and middle frame quick assembly structure. BACKGROUND

[0002] In the currently commonly used travel suitcase, a set of frames with concave-convex fitting is arranged on the opening edge of the front and rear suitcase shells, which aims to increase the use strength of the travel suitcase and improve the closure matching degree and tightness of the two-side suitcase shells, facilitating user use.

[0003] The prior art is rivet fixed, the frame after bending is fixed on the opening of the suitcase shell by rivets, the fixing mode principle is simple, and is most widely used in the industry at present, but is inconvenient to operate and has low production efficiency in actual production and use, and riveting by rivets needs a via hole of the rivet, multiple via hole fixing points must be arranged, thereby causing more steps of binding and more pre-processes. When the overlapping hole is arranged at the splicing overlapping position, misalignment occurs and needs manual correction, and the operability is not high. Meanwhile, the operator needs to hold the suitcase to operate the rivet operation machine, and when the suitcase size is large, the operation convenience is very low, the worker is easily tired, and the production efficiency and safety are affected. Because the number of rivets is large, the production efficiency is low, and the production cost of the product is increased.

[0004] The structure strength between the two rivets is weak and gaps are prone to occur, and even if the rivets are arranged densely, there is always a certain distance between the adjacent rivets, the distance is not completely fixed, the structure strength is low, the overall fixing strength is not ideal, and when local collision deformation occurs, the frame and the suitcase shell are easily separated to form gaps, thereby affecting the appearance and bringing bad product experience to the user.

[0005] The exposed rivets affect the appearance of the travel suitcase, the rivets are exposed on the outside of the frame, and the number is large, thereby affecting the overall appearance of the travel suitcase. UTILITY MODEL CONTENT

[0006] In order to overcome the deficiencies in the prior art, the utility model provides a travel suitcase mouth part buckle structure and middle frame quick assembly structure, which can effectively increase the assembly efficiency of the frame and the suitcase shell, improve the connection stability between the frame and the suitcase shell, and improve the overall appearance of the travel suitcase.

[0007] In order to achieve the above utility model purposes and solve the technical problems, the technical scheme adopted is as follows:

[0008] A suitcase mouth part buckle structure and a middle frame quick assembly structure, comprising a first box shell, a second box shell, a first frame, a first frame embedded groove, a second frame and a second frame embedded boss, wherein:

[0009] The first frame is arranged at the mouth part of the first box shell, and the first frame and the mouth part of the first box shell are both provided with a buckle structure, the buckle structures of the first frame and the mouth part of the first box shell are clamped and fixed, and the buckle structures of the first frame and the mouth part of the first box shell are mutually engaged.

[0010] The first box shell comprises a first box shell body, a first box shell mouth part and a first box shell buckle, and the first box shell mouth part is located at the left end of the first box shell body; the first box shell body is integrally formed or stamp-formed with a first box shell buckle which is horizontally arranged, has an opening facing the right side and has a Y-shaped structure, and is arranged at a position close to the first box shell mouth part, so as to abut against the first frame when the first box shell mouth part is clamped into the first frame.

[0011] The second frame is arranged at the mouth part of the second box shell, and the second frame and the mouth part of the second box shell are both provided with a buckle structure, the buckle structures of the second frame and the mouth part of the second box shell are clamped and fixed, and the buckle structures of the second frame and the mouth part of the second box shell are mutually engaged.

[0012] The second box shell comprises a second box shell body, a second box shell mouth part and a second box shell buckle, and the second box shell mouth part is located at the right end of the second box shell body; the second box shell body is integrally formed or stamp-formed with a second box shell buckle which is horizontally arranged, has an opening facing the left side and has a Y-shaped structure, and is arranged at a position close to the second box shell mouth part, so as to abut against the second frame when the second box shell mouth part is clamped into the second frame.

[0013] The first frame embedded groove is recessed in the middle of the first frame and has an opening facing the left side, and is used for embedding the second frame;

[0014] The second frame embedded boss is protruded in the middle of the second frame and has a boss facing the right side, and is used for embedding the first frame;

[0015] The first frame embedded groove and the second frame embedded boss are embedded with each other, so that the first frame and the second frame are buckled with each other to form a closed box internal space.

[0016] Further, the first frame comprises a first frame internal extension, a first frame internal mounting groove, a first frame buckle support rib position, a first frame top clamping part, a first frame clamping assembly groove, a first frame reverse buckle part and a first frame right side horizontal protruding rib.

[0017] The first frame internal extension is arranged below the right side of the first frame;

[0018] The first frame internal mounting slot is arranged below the middle of the first frame, and its opening faces downward, used for accommodating the inner lining fixing steel wire, so that the internal lining fixedly connected with the inner lining fixing steel wire through the internal lining fixing part is connected with the first frame;

[0019] The first frame buckling support rib is arranged below the left side of the first frame, used for supporting the second frame;

[0020] The first frame top clamping part is arranged horizontally on the top of the first frame;

[0021] The first frame clamping assembly slot is arranged on the upper part of the first frame, and its opening faces the right side, used for clamping the mouth of the first box shell;

[0022] The first frame reverse buckling part is vertically arranged at the right opening of the first frame clamping assembly slot;

[0023] The first frame right side horizontal rib is connected with the top of the first frame reverse buckling part, and is in a horizontal state, used for guiding the mouth of the first box shell.

[0024] Preferably, the first box shell further comprises a first box shell bending part, and the first box shell body is formed with a first box shell bending part inclined inward by integral molding or stamping molding near the first box shell buckle position.

[0025] Preferably, the right end of the first frame top clamping part abuts against the first box shell bending part when the mouth of the first box shell is clamped into the first frame clamping assembly slot, used for preventing the first box shell from loosening with the first frame.

[0026] Preferably, the transverse width of the first frame clamping assembly slot and the transverse width of the first box shell buckle are matched, used for preventing the first box shell from loosening with the first frame.

[0027] Further, the second frame comprises a second frame internal extension, a second frame internal mounting slot, a second frame top clamping part, a second frame clamping assembly slot, a second frame reverse buckling part, and a second frame left side horizontal rib, wherein:

[0028] The second frame internal extension is arranged below the left side of the second frame;

[0029] The second frame internal mounting groove is arranged below the middle part of the second frame and has an opening facing downward, and is used for accommodating the inner lining fixing steel wire, so that the internal lining fixedly connected with the internal lining fixing part and the second frame are connected through the inner lining fixing steel wire;

[0030] The second frame top clamping part is arranged horizontally on the top of the second frame;

[0031] The second frame clamping assembly groove is arranged on the upper part of the second frame and has an opening facing the left side, and is used for clamping the mouth part of the second box shell;

[0032] The second frame reverse clamping part is vertically arranged at the left opening of the second frame clamping assembly groove;

[0033] The second frame left side horizontal reinforcing rib is connected with the top of the second frame reverse clamping part and is in a horizontal state, and is used for guiding the mouth part of the second box shell.

[0034] Preferably, the second box shell further comprises a second box shell bending part, and the second box shell body is integrally formed or stamp-formed with an inwardly inclined second box shell bending part near the second box shell buckle position.

[0035] Preferably, the left end of the second frame top clamping part abuts against the second box shell bending part when the mouth part of the second box shell is clamped into the second frame clamping assembly groove, and is used for preventing the second box shell from being loose from the second frame.

[0036] Preferably, the transverse width of the second frame clamping assembly groove and the transverse width of the second box shell buckle are matched, and are used for preventing the second box shell from being loose from the second frame.

[0037] Compared with the prior art, the utility model has the following advantages and positive effects:

[0038] 1、the utility model discloses a travel suitcase mouth part buckle structure and middle frame quick assembly structure, and the transverse width of frame clamping assembly groove and the transverse width of box shell buckle are matched, and are used for preventing the connection between the box shell and the frame from being loose, thereby enhancing the clamping strength of the frame and the box shell and reducing the separation risk of the frame and the box shell.

[0039] 2、the utility model discloses a travel suitcase mouth part buckle structure and middle frame quick assembly structure, and the reverse clamping of the frame and the box shell is tightly matched after installation, effectively guarantees the connection stability between the frame and the box shell, no longer needs to be linked through rivets or other modes, improves the overall appearance and assembly efficiency of the travel suitcase.

[0040] 3, the utility model discloses a kind of suitcase mouth portion buckle structure and middle frame quick assembly structure, structure is reasonable, design is ingenious, convenient operation, high production efficiency, strong stability, low manufacturing cost. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings needed to be used in the embodiment description will be simply introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can also be obtained according to these drawings without creative labor for those skilled in the art. In the drawings:

[0042] Figure 1 It is a structure schematic view of the utility model of a kind of suitcase mouth portion buckle structure and middle frame quick assembly structure when suitcase adopts nailless framework;

[0043] Figure 2 It is a cross-sectional structure schematic view of the utility model of a kind of suitcase mouth portion buckle structure and middle frame quick assembly structure when suitcase adopts nailless framework;

[0044] Figure 3 It is the overall structure schematic view of the utility model of a kind of suitcase mouth portion buckle structure and middle frame quick assembly structure;

[0045] Figure 4 It is the structure schematic view of the utility model of a kind of suitcase mouth portion buckle structure and middle frame quick assembly structure in first frame and second frame;

[0046] Figure 5 It is the structure schematic view of the utility model of a kind of suitcase mouth portion buckle structure and middle frame quick assembly structure in first box shell first structure;

[0047] Figure 6 It is the structure schematic view of the utility model of a kind of suitcase mouth portion buckle structure and middle frame quick assembly structure in first box shell second structure;

[0048] Figure 7 It is the planing surface three-dimensional schematic view of the utility model of a kind of suitcase mouth portion buckle structure and middle frame quick assembly structure in first box shell buckle (or second box shell buckle);

[0049] Figure 8 It is the structure schematic view of the utility model of a kind of suitcase mouth portion buckle structure and middle frame quick assembly structure in first box shell buckle (or second box shell buckle) along the edge of suitcase mouth portion;

[0050] Figure 9 It is the structure schematic view of the utility model of a kind of suitcase mouth portion buckle structure and middle frame quick assembly structure in first box shell and first frame clamping step.

[0051] [Main symbol explanation]

[0052] 1 - first box shell; 11 - first box shell body; 12 - first box shell mouth part; 13 - first box shell buckle; 14 - first box shell bending part;

[0053] 2 - second box shell; 21 - second box shell body; 22 - second box shell mouth part; 23 - second box shell buckle; 24 - second box shell bending part;

[0054] 3 - first frame; 31 - first frame fitting groove; 32 - first frame internal extension; 33 - first frame internal mounting groove; 34 - first frame top clamping part; 35 - first frame clamping assembly groove; 36 - first frame reverse buckle part; 37 - first frame right side transverse protruding rib; 38 - first frame buckling support rib position;

[0055] 4 - second frame; 41 - second frame fitting boss; 42 - second frame internal extension; 43 - second frame internal mounting groove; 44 - second frame top clamping part; 45 - second frame clamping assembly groove; 46 - second frame reverse buckle part; 47 - second frame left side transverse protruding rib;

[0056] 5 - inner lining fixed steel wire;

[0057] 6 - internal inner lining fixing part;

[0058] 7 - internal inner lining. DETAILED DESCRIPTION

[0059] The technical scheme of the present application will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0060] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0061] In the description of the utility model, it needs to explain, unless another explicit provision and limitation, term " install " " link " " connection " should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through intermediate medium, can be two element internal communication. For ordinary skilled in the art, the above-mentioned term can be understood in the utility model with specific meaning of concrete case.

[0062] As Figures 1-9 The utility model discloses a travel suitcase mouth part buckle structure and middle frame quick assembly structure, including first case shell 1, second case shell 2, first frame 3, first frame inlay groove 31, second frame 4 and second frame inlay boss 41, wherein:

[0063] The first frame 3 is located at the mouth part of the first case shell 1, the first frame 3 and the mouth part of the first case shell 1 are both provided with a buckle structure, the buckle structure of the first frame 3 and the buckle structure of the mouth part 12 of the first case shell are clamped and fixed, and the buckle structure of the first frame 3 and the buckle structure of the mouth part 12 of the first case shell are mutually engaged.

[0064] The second frame 4 is located at the mouth part of the second case shell 2, the second frame 4 and the mouth part of the second case shell 2 are both provided with a buckle structure, the buckle structure of the second frame 4 and the buckle structure of the mouth part 22 of the second case shell are clamped and fixed, and the buckle structure of the second frame 4 and the buckle structure of the mouth part 22 of the second case shell are mutually engaged.

[0065] The first frame inlay groove 31 is recessed in the middle of the first frame 3, and the opening thereof faces the left side, for being mutually inlaid with the second frame 4.

[0066] The second frame inlay boss 41 is protruded in the middle of the second frame 4, and the boss thereof faces the right side, for being mutually inlaid with the first frame 3.

[0067] The first frame inlay groove 31 and the second frame inlay boss 41 are mutually inlaid, so that the first frame 3 and the second frame 4 are mutually buckled to form a closed box interior space.

[0068] Further referring to Figure 3 And 4 The first frame 3 includes a first frame internal extension 32, a first frame internal mounting groove 33, a first frame buckle support rib 38, a first frame top clamping portion 34, a first frame clamping assembly groove 35, a first frame reverse buckle portion 36, and a first frame right side transverse protruding rib 37.

[0069] The first frame internal extension 32 is arranged below the right side of the first frame 3.

[0070] The first frame internal mounting groove 33 is arranged below the middle of the first frame 3, and its opening faces downward, used for accommodating the inner lining fixing steel wire 5, so that the internal lining 7 fixedly connected with the inner lining fixing part 6 and the inner lining fixing steel wire 5 is connected with the first frame 3;

[0071] The first frame buckling support rib 38 is arranged below the left side of the first frame 3, used for supporting the second frame 4;

[0072] The first frame top clamping part 34 is arranged horizontally at the top of the first frame 3;

[0073] The first frame clamping assembly groove 35 is arranged at the upper part of the first frame 3, and its opening faces the right side, used for clamping the mouth of the first box shell 1;

[0074] The first frame reverse buckling part 36 is vertically arranged at the right opening of the first frame clamping assembly groove 35;

[0075] The first frame right side horizontal rib 37 is connected with the top of the first frame reverse buckling part 36, and is in a horizontal state, used for guiding the mouth of the first box shell 1.

[0076] Figure 5 And 7 In the first box shell 1, the first box shell 1 includes a first box shell body 11, a first box shell mouth 12, and a first box shell buckle 13, wherein:

[0077] The first box shell mouth 12 is located at the left end of the first box shell body 11;

[0078] The first box shell body 11 is integrally formed or stamp-formed with a first box shell buckle 13 which is horizontally arranged, has an opening facing the right side, and has a Y-shaped structure, at a position close to the first box shell mouth 12, used for abutting against the inner side of the first frame reverse buckling part 36 when the first box shell mouth 12 is clamped into the first frame clamping assembly groove 35.

[0079] Referring to Figure 6 The first box shell 1 further includes a first box shell bending part 14, which is integrally formed or stamp-formed with the first box shell body 11 at a position close to the first box shell buckle 13, and is inwardly inclined.

[0080] Preferably, the first box shell body 11, the first box shell mouth 12, and the first box shell buckle 13 are integrally formed, like Figure 5Or, the first box body 11, the first box bending part 14, the first box mouth part 12 and the first box buckle 13 are integrally formed, as shown in Figure 6

[0081] Preferably, the right end of the first frame top clamping part 34 abuts against the first box bending part 14 when the first box mouth part 12 is clamped into the first frame clamping assembly slot 35, so as to prevent the first box 1 from being loose with the first frame 3.

[0082] Preferably, the transverse width of the first frame clamping assembly slot 35 is matched with the transverse width of the first box buckle 13, so as to prevent the first box 1 from being loose with the first frame 3.

[0083] In the embodiment, the first box buckle 13 has a certain elasticity, so that the first box buckle 13 can be smoothly clamped into the first frame clamping assembly slot 35. The size of the right side opening of the first frame clamping assembly slot 35 can be customized according to the size of the corresponding first box buckle 13 and first box body 11, so as to adapt to different box thicknesses and processing conditions, and meet the structural strength of the clamping mouth of different product sizes.

[0084] Referring to Figure 3 and 4 , the second frame 4 comprises a second frame inner extension part 42, a second frame inner mounting slot 43, a second frame top clamping part 44, a second frame clamping assembly slot 45, a second frame reverse buckle part 46 and a second frame left side transverse rib 47, wherein:

[0085] The second frame inner extension part 42 is arranged below the left side of the second frame 4;

[0086] The second frame inner mounting slot 43 is arranged below the middle part of the second frame 4, and the opening thereof faces downward, for accommodating the inner lining fixing steel wire 5, so that the inner lining 7 fixedly connected with the inner lining fixing steel wire 5 through the inner lining fixing part 6 is connected with the second frame 4;

[0087] The second frame top clamping part 44 is arranged transversely on the top of the second frame 4;

[0088] The second frame clamping assembly slot 45 is arranged on the upper part of the second frame 4, and the opening thereof faces the left side, for clamping the mouth part of the second box 2;

[0089] The second frame reverse buckle part 46 is vertically arranged at the left side opening of the second frame clamping assembly slot 45;

[0090] ​The second frame left side transverse rib 47 is connected with the top of the second frame reverse buckling part 46 and is in horizontal state, which is used for guiding the mouth of the second box shell 2.

[0091] Figure 5 And 7 The second box shell 2 comprises a second box shell body 21, a second box shell mouth 22 and a second box shell buckle 23.

[0092] The second box shell mouth 22 is located at the right end of the second box shell body 21.

[0093] The second box shell body 21 is integrally formed or stamp-formed with a second box shell buckle 23 which is transversely arranged and has opening facing left side and Y-shaped structure, at the position close to the second box shell mouth 22, which is used for abutting with the inner side of the second frame reverse buckling part 46 when the second box shell mouth 22 is buckled into the second frame buckling assembly slot 45.

[0094] Referring to Figure 6 The second box shell 2 further comprises a second box shell bending part 24, which is integrally formed or stamp-formed with the second box shell body 21 at the position close to the second box shell buckle 23.

[0095] Preferably, the second box shell body 21, the second box shell mouth 22 and the second box shell buckle 23 are integrally formed, as shown in Figure 5 Or, the second box shell body 21, the second box shell bending part 24, the second box shell mouth 22 and the second box shell buckle 23 are integrally formed, as shown in Figure 6 .

[0096] Preferably, the left end of the second frame top buckling part 44 abuts with the second box shell bending part 24 when the second box shell mouth 22 is buckled into the second frame buckling assembly slot 45, which is used for preventing the second box shell 2 from loosening with the second frame 4.

[0097] Preferably, the transverse width of the second frame buckling assembly slot 45 and the transverse width of the second box shell buckle 23 are matched, which is used for preventing the second box shell 2 from loosening with the second frame 4.

[0098] In this embodiment, the second housing buckle 23 has a certain degree of elasticity, enabling it to smoothly engage with the second frame engagement slot 45. The size of the left opening of the second frame engagement slot can be customized according to the dimensions of the corresponding second housing buckle 23 and the second housing body 21 to adapt to different housing thicknesses and processing conditions, and to meet the structural strength requirements of the interlocking snaps for different product sizes.

[0099] Specific working principle:

[0100] like Figure 9 As shown, taking the first box shell 1 and the first frame 3 as an example, the first box shell 1 is inserted into the first frame 3 in the direction of the arrow to the left. The first frame 3 needs to be slightly forceful. The opening 12 of the first box shell first moves along the right transverse rib 37 of the first frame to the first frame snap-fit ​​assembly groove 35. The top snap-fit ​​part 34 of the first frame is pushed upward by the opening 12 of the first box shell. After the opening 12 of the first box shell and the buckle 13 of the first box shell pass through the right entrance of the first frame snap-fit ​​assembly groove 35 in sequence, the bent part 14 of the first box shell abuts against the right side of the top snap-fit ​​part 34 of the first frame. The buckle 13 of the first box shell abuts against the inner side of the inverted part 36 of the first frame, forming a mutually snapped state. At this time, the first box shell 1 is snapped and fixed in the first frame snap-fit ​​assembly groove 35 and cannot be removed.

[0101] Similarly, insert the second shell 2 into the second frame 4 in the direction of the arrow to the right. Slight force needs to be applied to the second frame 4. The opening 22 of the second shell first moves along the left transverse rib 47 of the second frame towards the second frame snap-fit ​​assembly groove 45. The top snap-fit ​​part 44 of the second frame is pushed upward by the opening 22 of the second shell. After the opening 22 of the second shell and the snap-fit ​​23 of the second shell pass through the left entrance of the second frame snap-fit ​​assembly groove 45 in sequence, the bent part 24 of the second shell abuts against the left side of the top snap-fit ​​part 44 of the second frame. The snap-fit ​​23 of the second shell abuts against the inner side of the inverted part 46 of the second frame, forming a snap-fit ​​state. At this time, the second shell 2 is snapped and fixed in the second frame snap-fit ​​assembly groove 45 and cannot be removed.

[0102] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A luggage mouth fastening structure and a middle frame quick assembly structure, characterized in that, The first box shell, the second box shell, the first frame and the first frame fitting recess, the second frame and the second frame fitting boss, wherein: The first frame is arranged at the mouth of the first box shell, and the first frame and the mouth of the first box shell are provided with buckling structures, the buckling structures of the first frame and the mouth of the first box shell are clamped and fixed, and the buckling structures of the first frame and the mouth of the first box shell are mutually engaged; The first box shell comprises a first box shell body, a first box shell mouth, and a first box shell buckle, the first box shell mouth is located at the left end of the first box shell body, and the first box shell body is integrally formed or stamp-formed with a first box shell buckle which is horizontally arranged, has an opening facing the right side and a Y-shaped structure, and is used for abutting against the first frame when the first box shell mouth is clamped into the first frame; The second frame is arranged at the mouth of the second box shell, and the second frame and the mouth of the second box shell are provided with buckling structures, the buckling structures of the second frame and the mouth of the second box shell are clamped and fixed, and the buckling structures of the second frame and the mouth of the second box shell are mutually engaged; The second box shell comprises a second box shell body, a second box shell mouth and a second box shell buckle, the second box shell mouth is located at the right end of the second box shell body, and the second box shell body is integrally formed or stamp-formed with a second box shell buckle which is horizontally arranged, has an opening facing the left side and a Y-shaped structure, and is used for abutting against the second frame when the second box shell mouth is clamped into the second frame; The first frame fitting recess is recessed in the middle of the first frame and has an opening facing the left side, and is used for fitting with the second frame; The second frame fitting boss is protruded in the middle of the second frame and has a boss facing the right side, and is used for fitting with the first frame; The first frame fitting recess and the second frame fitting boss are fitted with each other, so that the first frame and the second frame are buckled to form a closed box internal space.

2. The quick assembly structure of the mouth fastening structure of the suitcase and the middle frame according to claim 1, characterized in that, The first frame comprises a first frame internal extension, a first frame internal mounting groove, a first frame buckling support rib position, a first frame top clamping part, a first frame clamping assembly groove, a first frame reverse buckling part and a first frame right side horizontal protruding rib, wherein: The first frame internal extension is arranged below the right side of the first frame; The first frame internal mounting groove is arranged below the middle of the first frame and has an opening facing downward, and is used for accommodating an internal lining fixed steel wire, so that an internal lining fixedly connected with the internal lining fixed steel wire through an internal lining fixing part is connected with the first frame; The first frame buckling support rib position is arranged below the left side of the first frame and is used for supporting the second frame; The first frame top clamping part is horizontally arranged at the top of the first frame; The first frame clamping assembly groove is arranged at the upper part of the first frame and has an opening facing the right side, and is used for clamping the mouth of the first box shell; The first frame reverse buckling part is vertically arranged at the right opening of the first frame clamping assembly slot; The first frame right lateral convex rib is connected with the top of the first frame reverse buckling part and is in a horizontal state, and is used for guiding the mouth of the first box shell.

3. The mouth fastening structure of a travel case and the quick assembly structure of a middle frame according to claim 2, characterized in that, The first box shell further comprises a first box shell bending part, and the first box shell body is formed with an inwardly inclined first box shell bending part near the first box shell buckle position by integral molding or stamping molding.

4. The mouth fastening structure of a travel case and the quick assembly structure of a middle frame according to claim 3, characterized in that, The right end of the first frame top clamping part abuts against the first box shell bending part when the mouth of the first box shell is clamped into the first frame clamping assembly slot, and is used for preventing the first box shell from being loose with the first frame.

5. The quick assembly structure of the mouth fastening structure of the suitcase and the middle frame according to claim 2, characterized in that, The transverse width of the first frame clamping assembly slot and the transverse width of the first box shell buckle are matched, and are used for preventing the first box shell from being loose with the first frame.

6. The quick assembly structure of the mouth fastening structure of the suitcase and the middle frame according to claim 1, characterized in that, The second frame comprises a second frame internal extension part, a second frame internal mounting slot, a second frame top clamping part, a second frame clamping assembly slot, a second frame reverse buckling part, and a second frame left lateral convex rib, wherein: The second frame internal extension part is arranged below the left side of the second frame; The second frame internal mounting slot is arranged below the middle of the second frame, and the opening thereof faces downward, and is used for accommodating the internal lining fixing steel wire, so that the internal lining fixedly connected with the internal lining fixing steel wire through the internal lining fixing part is connected with the second frame; The second frame top clamping part is transversely arranged at the top of the second frame; The second frame clamping assembly slot is arranged at the upper part of the second frame, and the opening thereof faces the left side, and is used for clamping the mouth of the second box shell; The second frame reverse buckling part is vertically arranged at the left opening of the second frame clamping assembly slot; The second frame left lateral convex rib is connected with the top of the second frame reverse buckling part and is in a horizontal state, and is used for guiding the mouth of the second box shell.

7. The mouth fastening structure of a travel case and the quick assembly structure of a middle frame according to claim 6, characterized in that, The second box shell further comprises a second box shell bending part, and the second box shell body is formed with an inwardly inclined second box shell bending part near the second box shell buckle position by integral molding or stamping molding.

8. The mouth fastening structure of a travel case and the quick assembly structure of a middle frame according to claim 7, characterized in that, The left end of the second frame top clamping part abuts against the second box shell bending part when the mouth of the second box shell is clamped into the second frame clamping assembly slot, and is used for preventing the second box shell from being loose with the second frame.

9. The quick assembly structure of the mouth of the suitcase and the middle frame according to claim 6, characterized in that, The transverse width of the second frame clamping assembly slot and the transverse width of the second box shell buckle are matched, and are used for preventing the second box shell from being loose with the second frame.

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