EPP (Expanded Polypropylene) hard luggage case

Abstract

The utility model provides an EPP (Expanded Polypropylene) hard luggage case which comprises a case body and a case cover, an opening is formed in the case body, the case cover covers the opening, and both the case cover and the case body are made of EPP materials; a fixing piece is arranged on the side wall of the box body or the connecting position of the adjacent side walls of the box body, and the fixing piece forms a reinforcing face acting on the box body. And the buffer assembly is positioned on the box body or the box cover. The box body and the box cover are made of EPP materials, so that the luggage box is suitable for extremely high and low temperature environments due to excellent weather resistance, the production cost of the EPP hard luggage box is much lower than that of an aluminum alloy shell, the shock resistance is far better than that of a PC blister shell and the aluminum alloy shell, and the luggage box is relatively heavy and is easy to carry.

Description

Technical Field

[0001] The utility model relates to the field of luggage, and particularly to an EPP hard luggage. Background Art

[0002] The hard luggage in luggage is a kind of suitcase with specific materials and characteristics. Its box body material is relatively hard and not easy to deform. Hard luggage is usually suitable for long-distance travel, business trips and other situations where more items or heavy objects need to be carried. Its strong box body can better protect the items in the box and can withstand rough handling and transportation processes.

[0003] The materials of hard luggage are diverse. Common ones include PC (polycarbonate), ABS (acrylonitrile-butadiene-styrene copolymer), aluminum alloy, etc. These materials all have high hardness and strength, and can meet the requirements of hard luggage for compression resistance and impact resistance. Most hard luggage on the market currently usually has a plastic vacuum forming shell or an aluminum alloy shell. Most plastic vacuum forming shells are PC vacuum forming shells. The main disadvantages of PC vacuum forming shells are poor abrasion resistance, poor weather resistance, easy deformation at high temperatures, easy brittleness and damage at low temperatures, easy fingerprint and mud stain contamination on the surface, and easy yellowing of the color after long-term use, affecting the appearance. The primary disadvantage of the aluminum alloy shell is that it is too heavy, not easy to carry, has a relatively high production cost, is easy to dent on the surface when impacted and not easy to repair, affecting the appearance. Like the box body of the PC vacuum forming shell, the aluminum alloy shell is very easy to be contaminated with fingerprints and oil stains, not easy to clean, and the shell is relatively hard, and it cannot play a good role in protecting the internal items from vibration. Moreover, aluminum alloy is more sensitive to temperature changes and is prone to thermal expansion and cold contraction in extreme temperature environments. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an EPP hard luggage. The box body and the box cover are made of EPP material. Its excellent weather resistance makes the luggage suitable for extreme high and low temperature environments. The production cost of the EPP hard luggage of the utility model is much lower than that of the aluminum alloy shell, and its impact resistance is far superior to that of the PC vacuum forming shell and the aluminum alloy shell, and it is lighter in weight and easier to carry.

[0005] The technical solution to achieve the purpose of the utility model is as follows:

[0006] The utility model provides an EPP hard luggage, including: a box body forming an opening and a box cover covering the opening, and both the box cover and the box body are made of EPP material;

[0007] A fixing member is provided at the side wall of the box body or the connection of adjacent side walls of the box body, and the fixing member forms a strengthening surface acting on the box body;

[0008] It further includes a buffer assembly located on the box body or the box cover.

[0009] As a further improvement of the present utility model, the buffer assembly includes a bottom shell, and the bottom shell is at least arranged at the corners of the bottom of the box body.

[0010] As a further improvement of the present utility model, it further includes casters;

[0011] A bottom shell is fixedly arranged at the area of the bottom of the box body corresponding to the casters;

[0012] The casters are fixedly connected to the bottom shell.

[0013] As a further improvement of the present utility model, the bottom shell is located at the corner position where the side wall and the bottom wall of the bottom of the box body are connected;

[0014] The two bottom shells are connected by a bottom shell locking piece.

[0015] As a further improvement of the present utility model, there are multiple fixing pieces, and the multiple fixing pieces are arranged around the multiple side walls of the box body in the circumferential direction, and there is a spacing between adjacent fixing pieces;

[0016] The fixing pieces are embedded in the side wall of the box body or the connection of adjacent side walls of the box body to strengthen the side wall of the box body.

[0017] As a further improvement of the present utility model, a box cover metal frame is fixed on the box cover, a box body metal frame is fixed at the position of the box body opposite to the box cover, and when the box cover metal frame is in contact with the box body metal frame, the box cover and the box body are closed;

[0018] The box body metal frame is fixedly connected to the fixing piece to realize the relative fixation of the box body and the box body metal frame.

[0019] As a further improvement of the present utility model, the box cover metal frame is arranged along the circumferential direction of the box cover;

[0020] The box body metal frame is arranged along the circumferential direction of the box body.

[0021] As a further improvement of the present utility model, the fixing piece is a sheet metal embedded in the box body;

[0022] The sheet metal embedded in the box body includes a first embedded part and a second embedded part, and the first embedded part and the second embedded part are symmetrically arranged;

[0023] The first insert includes: a first vertical portion, a first horizontal portion, a second vertical portion, and a second horizontal portion that are sequentially connected in series. The first vertical portion is parallel to the second vertical portion, the first horizontal portion is parallel to the second horizontal portion. The length of the first vertical portion is more than three times the length of the second vertical portion, and the length of the first horizontal portion is more than three times the length of the second horizontal portion;

[0024] The structure of the second insert is the same as that of the first insert;

[0025] The box body metal frame contacts the second vertical portions of the first insert and the second insert.

[0026] As a further improvement of the present utility model, at least one handle is provided on the box body, and the handle is fixed to the side surface of the box body.

[0027] As a further improvement of the present utility model, a pull rod is further included;

[0028] The pull rod is located on both outer sides of the box body.

[0029] Compared with the prior art, the beneficial effects of the present utility model are:

[0030] The box body and the box cover of the present utility model are made of EPP material. A box cover metal frame is fixed on the box cover, and a box body metal frame is fixed on the box body through a box body insert sheet metal, overcoming the defect that the shear resistance of the EPP material is weak. The excellent weather resistance of the EPP material enables the luggage to be applicable to extreme high and low temperature environments. The production cost of the EPP hard luggage of the present utility model is much lower than that of an aluminum alloy shell, and the impact resistance performance is far superior to that of a PC plastic shell and an aluminum alloy shell, and the weight is relatively light and easy to carry. Description of the Drawings

[0031] Figure 1 A three-dimensional view of an EPP hard luggage provided by the present utility model;

[0032] Figure 2 A schematic diagram of the connection between the box body metal frame and the fixing member provided by the present utility model;

[0033] Figure 3 An installation diagram of the pull rod provided by the present utility model;

[0034] Figure 4 A schematic diagram of the connection between the bottom shell and the casters provided by the present utility model;

[0035] Figure 5 A cross-sectional view of an EPP hard luggage provided by the present utility model;

[0036] Reference numerals: 1 - box body; 2 - box cover; 3 - handle; 4 - pull rod; 5 - castor; 6 - metal frame of box body; 7 - metal frame of box cover; 8 - fixing member; 81 - first embedded member; 82 - second embedded member; 801 - first vertical portion; 802 - first horizontal portion; 803 - second vertical portion; 804 - second horizontal portion; 9 - bottom shell; 10 - bottom shell locking member. Detailed implementation manners

[0037] The present utility model will be described in detail below with reference to the embodiments shown in the drawings. However, it should be noted that these embodiments do not limit the present utility model. Any equivalent transformation or substitution in terms of function, method, or structure made by those of ordinary skill in the art according to these embodiments shall fall within the protection scope of the present utility model.

[0038] Please refer to Figure 1 , an EPP rigid luggage case provided by an embodiment of the present utility model includes: a box body 1 forming an opening, and a box cover 2 covering the opening, and further includes: a buffer assembly located on the box body 1 or the box cover 2. The box cover 2 and the box body 1 of the embodiment of the present utility model are both made of EPP material. EPP (Expanded polypropylene) is a high-crystalline polymer / gas composite material with excellent performance, and has become the fastest-growing environmentally friendly new anti-pressure buffer and heat insulation material due to its unique and superior performance. EPP products have very excellent earthquake resistance and energy absorption performance, high recovery rate after deformation, good heat resistance, chemical resistance, oil resistance, and heat insulation. In addition, the EPP material is light in weight and can greatly reduce the weight of items.

[0039] A fixing member 8 is provided at the connection of the side wall of the box body 1 of the embodiment of the present utility model or at the connection of adjacent side walls of the box body 1, and the fixing member 8 forms a strengthening surface acting on the box body 1; the adjacent side walls of the box body 1 in the embodiment of the present utility model refer to the connection of two connected side walls on the box body 1. The purpose of providing the fixing member 8 at the side wall of the box body 1 or at the connection of adjacent side walls in the embodiment of the present utility model is to increase the strength of the side wall of the box body 1. Preferably, the fixing member 8 of the embodiment of the present utility model is embedded in the side wall. Please refer to Figure 2 , the fixing member 8 of the embodiment of the present utility model is preferably an embedded sheet metal inside the box; Figure 2The embedded sheet metal in the shown box body includes a first embedded part 81 and a second embedded part 82, and the first embedded part 81 and the second embedded part 82 are symmetrically arranged; the first embedded part 81 includes: a first vertical part 801, a first horizontal part 802, a second vertical part 803 and a second horizontal part 804 that are sequentially connected in series. The first vertical part 801 is parallel to the second vertical part 803, the first horizontal part 802 is parallel to the second horizontal part 804. The length of the first vertical part 801 is more than 3 times the length of the second vertical part 803, and the length of the first horizontal part 802 is more than 3 times the length of the second horizontal part 804; the structure of the second embedded part 82 is the same as that of the first embedded part 81. Please continue to refer to Figure 2 There are multiple fixing parts 8 in the embodiment of the present invention. The multiple fixing parts 8 are arranged around the side walls of the box body 1 in the circumferential direction, and there is a spacing between adjacent fixing parts 8; the fixing parts 8 are embedded in the side wall of the box body 1 or the connection part of adjacent side walls of the box body 1 to strengthen the side wall of the box body 1.

[0040] Please refer to Figure 4 In the embodiment of the present invention, the buffer assembly includes a bottom shell 9, and the bottom shell 9 is at least arranged at the corners of the bottom of the box body 1. The purpose of setting the buffer assembly in the embodiment of the present invention is to prevent the box body 1 from being punctured by sharp objects and leaving pits. Leaving pits will not only affect the appearance of the box body 1 but also affect the strength of the box body 1 itself.

[0041] Please continue to refer to Figure 4 In order to make it easier to move the box body 1, the EPP hard suitcase in the embodiment of the present invention further includes a caster 5; a bottom shell 9 is fixedly arranged at the area of the bottom of the box body 1 corresponding to the caster 5; the caster 5 is fixedly connected to the bottom shell 9. Preferably, the caster 5 in the embodiment of the present invention is connected to the bottom shell 9. Since the box body 1 made of EPP material has a low hardness, it is easy to leave pits when punctured by sharp objects, affecting the appearance. And because the box body 1 made of EPP material has certain defects in its own strength, the box body 1 is easily damaged when the caster 5 is impacted. Therefore, adding a bottom shell 9 to the bottom of the box body 1 not only avoids the bottom of the suitcase from being punctured by sharp objects when towing, but also can integrate the wheel seat of the caster 5 and the bottom shell 9 into a whole to increase the overall strength of the box body 1.

[0042] Please continue to refer to Figure 4 In the embodiment of the present invention, the bottom shell 9 is located at the corner position where the side wall and the bottom wall of the bottom of the box body 1 are connected; the two bottom shells 9 are connected by a bottom shell lock 10.

[0043] Please continue to refer to Figure 1 In the embodiment of the present invention, a box cover metal frame 7 is fixed on the box cover 2, and a box body metal frame 6 is fixed at the position of the box body 1 relative to the box cover 2. When the box cover metal frame 7 and the box body metal frame 6 are in contact, the box cover 2 and the box body 1 are closed; the box body metal frame 6 is fixedly connected to the fixing part 8 to realize the relative fixation of the box body 1 and the box body metal frame 6. Please continue to refer toFigure 2 In the embodiment of the present utility model, the box body metal frame 6 contacts the second vertical portions 803 of the first embedded member 81 and the second embedded member 82, and the second vertical portions 803 of the first embedded member 81 and the second embedded member 82 are fixedly connected to the box body metal frame 6. The box body metal frame 6 in the embodiment of the present utility model is preferably the aluminum frame of the box body 1. Since the traditional aluminum frame needs to be fixed by driving rivets on the outer side of the box body 1 and locking on the inner side, many rivet heads will be left on the outside of the box body 1, affecting the appearance. Moreover, the shear Poisson's ratio of the EPP material is not as good as that of PC and aluminum alloy, so it is impossible to directly fix by driving rivets and locking. In the embodiment of the present utility model, a plurality of first embedded members 81 and second embedded members 82 are embedded in the side wall of the box body 1, and the first embedded members 81, the second embedded members 82 and the aluminum frame of the box body 1 are fixed by screws. If a sealing strip is added to the surface of the aluminum frame of the box body 1, the screw heads will also be covered, and no rivet heads will be left on the outside of the box body 1, which is very beautiful. In practical applications, preferably, the box cover metal frame 7 in the embodiment of the present utility model is arranged along the circumferential direction of the box cover 2; the box body metal frame 6 is arranged along the circumferential direction of the box body 1.

[0044] Please refer to Figure 5 In the embodiment of the present utility model, at least one handle 3 is provided on the box body 1, and the handle 3 is fixed to the side surface of the box body 1. Since the thickness of the EPP box body 1 is relatively thick, grooves can be designed at the handle 3, and it is easier for the user to put the hand into the handle 3, which is convenient for lifting and carrying.

[0045] Since the wall thickness of the EPP box body 1 is relatively thick (this is because the EPP box body 1 is too thin to be formed and the strength cannot pass the box body 1 test), it is difficult to fix the pull rod 4 on the box body 1. If the pull rod 4 is placed in the middle of the box body 1, the space utilization rate of the box body 1 will decrease. Therefore, in the embodiment of the present utility model, the pull rod 4 is placed on both outer sides of the box body 1, and the pull rod 4 is surrounded by the box body 1 on all four sides, which not only ensures the beauty of the luggage but also improves the space utilization rate of the box body 1. Specifically, please refer to Figure 3 In the embodiment of the present utility model, the EPP hard luggage also includes a pull rod 4; the pull rod 4 is located on both outer sides of the box body 1.

[0046] A box cover 2, a handle 3, a pull rod 4 and a caster 5 are fixed on the box body 1, and the box body metal frame 6 is fixed on the box cover 2. Among them, the box body 1 and the box cover 2 are connected and fixed through a rotating mechanism, and the box cover 2 can rotate within a certain angle. The handle 3 and the pull rod 4 are directly or indirectly fixed on the box body 1 by screws or rivets. The box cover metal frame 7 is fixed on the box cover 2. The fixing member 8 is embedded in the box body 1 when the box body 1 is formed. The bottom shell 9 and the bottom shell locking member 10 are locked on the box body 1 together by screws. There can be one or more box covers 2, as well as one or more handles 3 and two or more casters 5 on this luggage.

[0047] In terms of cost, the EPP hard-sided luggage of the embodiments of the present utility model is lower than that of the aluminum alloy shell. The EPP molding process is simple, and the material is much cheaper than aluminum alloy. The impact resistance of the embodiments of the present utility model is far superior to that of the PC shell and the aluminum alloy shell. The EPP is relatively soft in hardness. When encountering strong impacts, the EPP box itself can buffer and will not have permanent dents, providing excellent protection for the items in the box. The EPP of the embodiments of the present utility model has excellent weather resistance. In extreme high and low temperature environments, the material properties will not change significantly, and the water absorption is extremely low, so it will not get damp or mildew, which has great advantages compared with the PC shell. The EPP of the embodiments of the present utility model has excellent chemical stability. The PC box has extremely poor tolerance to strong acids, strong alkalis and certain organic solvents, while the aluminum alloy shell is relatively easy to be corroded by acidic solvents. The density of the EPP of the embodiments of the present utility model is much lower than that of PC and aluminum alloy, and the weight is lighter, which has great advantages for luggage that needs to be carried frequently. The EPP material of the embodiments of the present utility model can be 100% recycled, which is extremely friendly to the environment. However, the production and recycling of aluminum alloy have a great impact on the environment.

[0048] The series of detailed descriptions listed above are only specific descriptions of the feasible implementation manners of the present utility model, and they are not intended to limit the protection scope of the present utility model. Any equivalent implementation manners or changes made without departing from the technical spirit of the present utility model should be included in the protection scope of the present utility model.

[0049] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0050] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An EPP hard luggage case, comprising: A box body with an opening and a box cover covering the opening are formed, wherein the box cover and the box body are both made of EPP material; A fixing piece is provided at the side wall of the box or at the connection between adjacent side walls of the box, and the fixing piece forms a reinforcement surface acting on the box; It also includes: a buffer component located on the box body or the box cover.

2. The EPP hard luggage case according to claim 1, characterized in that: The buffer assembly comprises a bottom shell, and the bottom shell is at least arranged at a corner of the bottom of the box body.

3. The EPP hard luggage case according to claim 2, characterized in that: Also includes walking wheels; A bottom shell is fixedly arranged at the bottom of the box body in an area corresponding to the running wheel; The running wheel is fixedly connected to the bottom shell.

4. The EPP hard luggage case according to claim 2, characterized in that: The bottom shell is located at the corner where the side wall and the bottom wall of the bottom of the box body are connected; The two bottom shells are connected via a bottom shell locking piece.

5. The EPP hard luggage case according to claim 1, characterized in that: There are a plurality of fixing members, and the plurality of fixing members are arranged around a plurality of side walls in the circumferential direction of the box body, and there is a spacing between adjacent fixing members; The fixing member is embedded in the side wall of the box or the connection between adjacent side walls of the box to strengthen the side wall of the box.

6. The EPP hard luggage case according to claim 1, characterized in that: A metal frame of the box cover is fixed on the box cover, and a metal frame of the box body is fixed at a position of the box body relative to the box cover, and the box cover and the box body are covered in a state where the metal frame of the box cover is in contact with the metal frame of the box body; The box metal frame is fixedly connected to the fixing piece to achieve relative fixation between the box and the box metal frame.

7. The EPP hard luggage case according to claim 6, characterized in that: The box cover metal frame is arranged along the circumference of the box cover; The box metal frame is arranged along the circumference of the box.

8. An EPP hard luggage case according to claim 1 or 6, characterized in that: The fixing member is a sheet metal embedded in the box; The box body embedded sheet metal includes a first embedded part and a second embedded part, and the first embedded part and the second embedded part are symmetrically arranged; The first inner insert comprises: a first vertical portion, a first transverse portion, a second vertical portion and a second transverse portion connected in sequence, the first vertical portion is parallel to the second vertical portion, the first transverse portion is parallel to the second transverse portion, the length of the first vertical portion is greater than 3 times the length of the second vertical portion, and the length of the first transverse portion is greater than 3 times the length of the second transverse portion; The structure of the second inner insert is the same as that of the first inner insert; The box metal frame contacts the first inner embedded component and the second vertical portion of the second inner embedded component.

9. The EPP hard luggage case according to claim 1, characterized in that: The box body is provided with at least one handle, and the handle is fixed to the side surface of the box body.

10. The EPP hard luggage case according to claim 1, characterized in that: Also includes tie rods; The pull rods are located at two sides of the outer side of the box body.

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