Corrugated paper folding house
By designing corrugated folding houses, the problems of high cost, inconvenient transportation and great environmental impact of traditional temporary residences are solved, and the effects of portability, easy construction and environmental protection are achieved.
Patent Information
- Application Number
- CN202421903197.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-07
AI Technical Summary
Traditional temporary residences such as tents and container houses have high manufacturing and construction costs, inconvenient transportation and storage, complex construction and dismantling processes, and have a great impact on the environment.
A corrugated paper folding house was designed. The middle house was placed on the ground by hand holder, stretching the top left plate, top right plate, left side plate and right side plate to make it horizontal. The front side plate and front door plate are pulled to the back side by hand holder, so that it fits closely, achieving convenient entry and exit.
It achieves portable and easy-to-build effects, reduces manufacturing and construction costs, simplifies transportation and storage processes, reduces the complexity of construction and disassembly, and improves environmental friendliness.
Smart Images

Figure CN222909051U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of folding houses, and specifically to a corrugated paper folding house. Background Art
[0002] Corrugated paper is a lightweight, high-strength and easy-to-process material, which is widely used in the packaging industry. However, its application in the construction field is relatively less.
[0003] However, in today's society, with the increase in population mobility and the frequent occurrence of various emergencies, the demand for temporary shelters has increased significantly. Traditional temporary shelters such as tents and container houses, although meeting the market demand to a certain extent, also have many limitations. The main problems include high manufacturing and construction costs, inconvenient transportation and storage, complex construction and disassembly processes, and greater impact on the environment. Content of the Utility Model
[0004] In order to make up for the deficiencies of the prior art, and to solve the problems that existing container houses, tents, etc. have many limitations in use and are inconvenient for operators to transport and store container houses, the utility model provides a corrugated paper folding house.
[0005] The technical solution adopted by the utility model to solve its technical problems is: a corrugated paper folding house, including a middle house. The middle house includes a top left plate, and the left side of the top left plate is movably connected to a top right plate. The left side of the top right plate is provided with a right side plate, and the right side of the top left plate is provided with a left side plate. The bottom of the right side of the right side plate is provided with a bottom right plate, and the right side of the bottom right plate is movably connected to a bottom left plate. The right side of the bottom left plate is installed at the bottom of the left side of the left side plate.
[0006] Preferably, side panels are movably connected to the back sides of the top left plate, top right plate, bottom left plate and bottom right plate. The side panels include a front top plate, a front left plate and a front right plate. The top of the front side of the front top plate is movably connected to the back sides of the top left plate and the top right plate. The bottom of the front side of the front left plate is movably connected to the back side of the bottom left plate. The bottom of the front side of the front right plate is movably connected to the back side of the bottom right plate. The left side of the front left plate and the right side of the front right plate are movably connected to both sides of the bottom of the front top plate.
[0007] Preferably, front side panels are movably connected to the front sides of the top left plate, top right plate, bottom left plate and bottom right plate. The front side panels include a left door panel and a right door panel. The left side of the left door panel is movably connected to the right side of the right door panel. The back side of the left door panel is movably connected to the front sides of the top left plate, the left side plate and the bottom left plate. The back side of the right door panel is movably connected to the front sides of the top right plate, the right side plate and the bottom right plate.
[0008] Preferably, a left house and a right house are respectively installed on the right side and the left side of the middle house. The left house and the right house include an inwardly recessed plate one. The inner side of the inwardly recessed plate one is movably connected to an inwardly recessed plate two. The inner side of the inwardly recessed plate two is movably connected to an inwardly recessed plate three. The top of the inwardly recessed plate one is movably connected to a top recessed plate one. The inner side of the top recessed plate one is movably connected to a top recessed plate two. The front side of the top recessed plate two is movably connected to the back side of the inwardly recessed plate two. The inner side of the top recessed plate two is movably connected to a top recessed plate three. The front side of the top recessed plate three is movably connected to the back side of the inwardly recessed plate three.
[0009] Preferably, slot holes are provided at the left side of the inner cavity of the top right plate, the right side of the inner cavity of the top left plate, the top and bottom of the inner cavities of the left side plate and the right side plate, the left side of the inner cavity of the bottom right plate, the right side of the inner cavity of the bottom left plate, the top and bottom of the left side of the inner cavity of the left house, and the top and bottom of the right side of the inner cavity of the right house. The slot holes are arranged in a circular structure and the number thereof is multiple.
[0010] Preferably, connectors are movably connected to the inner cavities of the bottom left plate, the bottom right plate, the right side plate, the left side plate, the top left plate, the top right plate, the left house and the right house. The inner side of the surface of the connector is movably connected to a fitting one. The outer side of the surface of the connector is movably connected to a fitting two. The inner cavities of the connector and the fitting one are both movably connected to a nut rod. The outer side of the inner cavity of the nut rod is threadedly connected to a threaded rod. The outer side of the nut rod is closely attached to the inner side of the fitting one. The inner side of the threaded rod is closely attached to the outer side of the fitting two.
[0011] Preferably, the top left plate, the left side plate, the top right plate, the right side plate, the bottom left plate and the bottom right plate are integrally arranged in a trapezoidal structure. The front top plate, the front left plate and the front right plate are all arranged in a triangular structure.
[0012] The beneficial effects of the present utility model are as follows:
[0013] The utility model places the middle house on the ground by hand, pulls the bottom left plate and the bottom right plate downward by hand, so that the bottoms of the bottom left plate and the bottom right plate are closely attached to the ground. Subsequently, the left side plate and the right side plate are stretched to both sides by hand, so that the top left plate and the top right plate are stretched to a horizontal state. After the top left plate, the left side plate, the top right plate, the right side plate, the bottom left plate and the bottom right plate are stretched, the front top plate attached to the bottoms of the top left plate and the top right plate is pulled backward by hand. Subsequently, the front left plate and the front right plate attached to the tops of the bottom left plate and the bottom right plate are pulled backward by hand, so that the front top plate, the front left plate and the front right plate are closely attached to each other. Subsequently, the operator can pull the right door plate or the left door plate forward, so that the operator can enter the inner cavity of the middle house, thereby achieving the functions of being portable and easy to build, and solving the problems that in today's society, with the increase of population mobility and the frequent occurrence of various emergencies, the demand for temporary shelters has increased significantly. Although traditional temporary shelters such as tents and container houses meet the market demand to a certain extent, there are also many limitations. The main problems include high manufacturing and construction costs, inconvenient transportation and storage, complex construction and disassembly processes, and greater impact on the environment. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0015] Figure 1 It is a schematic structural diagram of the side panel of the present utility model;
[0016] Figure 2 It is a schematic structural diagram of the front top plate of the present utility model;
[0017] Figure 3 It is a schematic structural diagram of the left door panel of the present utility model;
[0018] Figure 4 It is a schematic structural diagram of the bottom left plate of the present utility model;
[0019] Figure 5 It is a schematic structural diagram of the first sunken plate of the present utility model;
[0020] Figure 6 It is a schematic structural diagram of the third sunken top plate of the present utility model;
[0021] Figure 7 It is a schematic structural diagram of the left house of the present utility model;
[0022] Figure 8Schematic diagram of the nut rod structure of the present utility model;
[0023] Figure 9 Schematic diagram of the connecting member structure of the present utility model.
[0024] In the figure: 1, top left plate; 2, left side plate; 3, top right plate; 4, right side plate; 5, bottom left plate; 6, bottom right plate; 7, front top plate; 8, front left plate; 9, front right plate; 10, side panel; 11, connecting member; 20, front side plate; 21, left door panel; 22, right door panel; 100, middle house; 200, left house; 300, right house; 201, first recessed plate; 202, second recessed plate; 203, third recessed plate; 204, first top recessed plate; 205, second top recessed plate; 206, third top recessed plate; 401, nut rod; 402, threaded rod; 403, first fitting; 404, second fitting. Specific embodiments
[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0026] The following is a further detailed description of the present application in conjunction with the attached Figures 1-9 to further illustrate the present application in detail.
[0027] An embodiment of the present application discloses a corrugated paper folding house. Referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 , a corrugated paper folding house includes a middle house 100. The middle house 100 includes a top left plate 1. The left side of the top left plate 1 is movably connected to a top right plate 3. The left side of the top right plate 3 is provided with a right side plate 4. The right side of the top left plate 1 is provided with a left side plate 2. The bottom of the right side of the right side plate 4 is provided with a bottom right plate 6. The right side of the bottom right plate 6 is movably connected to a bottom left plate 5. The right side of the bottom left plate 5 is installed at the bottom left side of the left side plate 2.
[0028] Referring to Figure 1 and Figure 2, side panels 10 are movably connected to the dorsal sides of the top left plate 1, top right plate 3, bottom left plate 5, and bottom right plate 6. The side panel 10 includes a front top plate 7, a front left plate 8, and a front right plate 9. The top of the front side of the front top plate 7 is movably connected to the dorsal sides of the top left plate 1 and top right plate 3. The bottom of the front side of the front left plate 8 is movably connected to the dorsal side of the bottom left plate 5. The bottom of the front side of the front right plate 9 is movably connected to the dorsal side of the bottom right plate 6. The left side of the front left plate 8 and the right side of the front right plate 9 are movably connected to both sides of the bottom of the front top plate 7. Through the arrangement of the front top plate 7, front left plate 8, and front right plate 9, after being spliced by the front top plate 7, front left plate 8, and front right plate 9, it achieves the effect of supporting and fixing the top left plate 1, left side plate 2, top right plate 3, right side plate 4, bottom left plate 5, and bottom right plate 6 in the working state, thereby preventing the phenomenon of collapse of the top left plate 1 and top right plate 3.
[0029] Refer to Figure 3 , front side panels 20 are movably connected to the front sides of the top left plate 1, top right plate 3, bottom left plate 5, and bottom right plate 6. The front side panel 20 includes a left door panel 21 and a right door panel 22. The left side of the left door panel 21 is movably connected to the right side of the right door panel 22. The dorsal side of the left door panel 21 is movably connected to the front sides of the top left plate 1, left side plate 2, and bottom left plate 5. The dorsal side of the right door panel 22 is movably connected to the front sides of the top right plate 3, right side plate 4, and bottom right plate 6. Through the arrangement of the left door panel 21 and right door panel 22, it is more convenient for the operator to enter the inner cavity of the middle room 100 by rotating the right door panel 22 and left door panel 21, and at the same time, it achieves the effect of supporting and stabilizing the top left plate 1 and top right plate 3 in the working state through the left door panel 21 and right door panel 22.
[0030] Refer to Figure 1 , Figure 5 , Figure 6 , Figure 7 and Figure 8, on the right and left sides of the middle house 100, a left house 200 and a right house 300 are respectively installed. The left house 200 and the right house 300 include an in-sunk plate one 201. An in-sunk plate two 202 is movably connected to the inner side of the in-sunk plate one 201. An in-sunk plate three 203 is movably connected to the inner side of the in-sunk plate two 202. A top in-sunk plate one 204 is movably connected to the top of the in-sunk plate one 201. A top in-sunk plate two 205 is movably connected to the inner side of the top in-sunk plate one 204. The front side of the top in-sunk plate two 205 is movably connected to the back side of the in-sunk plate two 202. A top in-sunk plate three 206 is movably connected to the inner side of the top in-sunk plate two 205. The front side of the top in-sunk plate three 206 is movably connected to the back side of the in-sunk plate three 203. By manually folding the top in-sunk plate one 204 inward, a convex top in-sunk plate two 205 is then formed. On this basis, the connected surface top in-sunk plate three 206 is folded inward, and then overlapped. When folding the top in-sunk plate one 204 on the folding surface at the same time, the in-sunk plate one 201 is folded outward, and then the in-sunk plate two 202 is formed. Then, on this basis, the in-sunk plate three 203 connected to the in-sunk plate two 202 is folded outward, and then the folding is repeated. The same folding is performed on the other side, and then the left house 200 and the right house 300 are formed, thus achieving the functions of convenience, simple assembly, and space division and utilization.
[0031] Refer to Figure 2 , Figure 3 and Figure 4 , on the left side of the inner cavity of the top right plate 3, on the right side of the inner cavity of the top left plate 1, at the top and bottom of the inner cavities of the left side plate 2 and the right side plate 4, on the left side of the inner cavity of the bottom right plate 6, on the right side of the inner cavity of the bottom left plate 5, at the top and bottom of the left side of the inner cavity of the left house 200, and at the top and bottom of the right side of the inner cavity of the right house 300, slot holes are provided. The slot holes are arranged in a circular structure and the number is multiple. Through the setting of the slot holes, it is more convenient for the operator to install the top right plate 3, the top left plate 1, the left side plate 2, the right side plate 4, the bottom right plate 6, the bottom left plate 5, the left house 200, and the right house 300 in the working state by installing through the slot holes to achieve the effect of installation and fixation.
[0032] Refer to Figure 8 and Figure 9, a connecting member 11 is movably connected to the inner cavities of the bottom left plate 5, the bottom right plate 6, the right side plate 4, the left side plate 2, the top left plate 1, the top right plate 3, the left house 200 and the right house 300. A first fitting 403 is movably connected to the inner side of the surface of the connecting member 11, and a second fitting 404 is movably connected to the outer side of the surface of the connecting member 11. A nut rod 401 is movably connected to the inner cavities of both the connecting member 11 and the first fitting 403. A threaded rod 402 is threadedly connected to the outer side of the inner cavity of the nut rod 401. The outer side of the nut rod 401 is closely attached to the inner side of the first fitting 403, and the inner side of the threaded rod 402 is closely attached to the outer side of the second fitting 404. After aligning the bottom right plate 6, the right side plate 4 and the right house 300 by hand and making them fit together, and aligning the slot holes among the three, after the alignment is completed, the operator inserts the connecting member 11 into the slot holes by hand. Subsequently, the first fitting 403 and the second fitting 404 are sleeved on both sides of the surface of the connecting member 11. After the first fitting 403 and the second fitting 404 are placed, the operator inserts the nut rod 401 into the inner cavities of the connecting member 11 and the first fitting 403 by hand. Subsequently, the threaded rod 402 is inserted into the nut rod 401 inside the inner cavity of the connecting member 11, and the threaded rod 402 is rotated. In this way, under the action of the thread, the nut rod 401 and the threaded rod 402 move inward and are fixed at the same time. Subsequently, the outer side of the nut rod 401 and the inner side of the threaded rod 402 are respectively closely attached to the inner side of the first fitting 403 and the outer side of the second fitting 404.
[0033] Referring to Figure 1 , Figure 2 , Figure 3 , Figure 8 and Figure 9 , the top left plate 1, the left side plate 2, the top right plate 3, the right side plate 4, the bottom left plate 5 and the bottom right plate 6 are integrally arranged in a trapezoidal structure. The front top plate 7, the front left plate 8 and the front right plate 9 are all arranged in a triangular structure. Through the integral trapezoidal arrangement of the top left plate 1, the left side plate 2, the top right plate 3, the right side plate 4, the bottom left plate 5 and the bottom right plate 6, it can achieve a certain supporting and stabilizing effect on the top left plate 1, the left side plate 2, the top right plate 3, the right side plate 4, the bottom left plate 5 and the bottom right plate 6 in the working state. Through the triangular structure arrangement of the front top plate 7, the front left plate 8 and the front right plate 9, the front top plate 7, the front left plate 8 and the front right plate 9 are more closely attached to each other, and then the effect of supporting and stabilizing the top left plate 1 and the top right plate 3 in the working state is realized.
[0034] Working principle: First, place the middle house 100 on the ground by hand. Pull the bottom left plate 5 and the bottom right plate 6 downward by hand so that the bottoms of the bottom left plate 5 and the bottom right plate 6 are closely attached to the ground. Then, stretch the left side plate 2 and the right side plate 4 to both sides by hand, so that the top left plate 1 and the top right plate 3 are stretched to a horizontal state. After the stretching of the top left plate 1, the left side plate 2, the top right plate 3, the right side plate 4, the bottom left plate 5 and the bottom right plate 6 is completed, pull the front top plate 7 attached to the bottoms of the top left plate 1 and the top right plate 3 backward by hand. Then, pull the front left plate 8 and the front right plate 9 attached to the tops of the bottom left plate 5 and the bottom right plate 6 backward by hand, so that the front top plate 7, the front left plate 8 and the front right plate 9 are closely attached to each other. Then, the operator can pull the right door panel 22 or the left door panel 21 forward, so that the operator can enter the inner cavity of the middle house 100, thus achieving the functions of being portable and easy to assemble. Secondly, place the right side plate 4 on the left side of the top right plate 3 and the bottom right plate 6 by hand. Then, place the right house 300 on the left side of the right side plate 4 and align the slot holes among the three in sequence. After the alignment is completed, insert the connector 11 into the slot holes by hand. Then, put the first accessory 403 and the second accessory 404 on both sides of the surface of the connector 11. After the first accessory 403 and the second accessory 404 are placed, insert the nut rod 401 into the inner cavities of the connector 11 and the first accessory 403 by hand. Then, insert the threaded rod 402 into the nut rod 401 inside the inner cavity of the connector 11 and rotate the threaded rod 402. In this way, under the action of the thread, while the nut rod 401 and the threaded rod 402 move inward, a fixing effect is achieved. Then, make the outer side of the nut rod 401 and the inner side of the threaded rod 402 closely attached to the inner side of the first accessory 403 and the outer side of the second accessory 404 respectively. Then, place the left side plate 2 on the right side of the top left plate 1 and the bottom left plate 5 by hand. Then, place the left house 200 on the right side of the left side plate 2 and align the slot holes among the three in sequence. After the alignment is completed, repeat the above installation work, thus achieving the function of installing and fixing the middle house 100, the left house 200 and the right house 300 in the working state. Finally, turn the top sunken plate one 204 inward by hand, and then form the raised top sunken plate two 205. On this basis, turn the connected surface top sunken plate three 206 inward, and then overlap them. At the same time, when folding the surface top sunken plate one 204, turn the sunken plate one 201 outward, and then form the sunken plate two 202. Then, on this basis, turn the sunken plate three 203 connected to the sunken plate two 202 outward, and then repeat the folding. The same folding is done on the other side, and then the left house 200 and the right house 300 are formed, thus achieving the functions of being convenient, simple to assemble and space division and utilization.Moreover, the top left plate 1, left side plate 2, top right plate 3, right side plate 4, bottom left plate 5, bottom right plate 6, front top plate 7, front left plate 8, front right plate 9, side panel 10, left door panel 21, right door panel 22, middle house 100, left house 200, right house 300, first recessed plate 201, second recessed plate 202, third recessed plate 203, first top recessed plate 204, second top recessed plate 205, and third top recessed plate 206 are all made of corrugated paper material, thus enabling cost reduction, simplified construction, convenient transportation and storage, rapid erection and disassembly, and environmental protection and sustainability. In addition, folding groove impressions are provided on the surfaces of the top left plate 1, left side plate 2, top right plate 3, right side plate 4, bottom left plate 5, bottom right plate 6, front top plate 7, front left plate 8, front right plate 9, side panel 10, left door panel 21, right door panel 22, middle house 100, left house 200, right house 300, first recessed plate 201, second recessed plate 202, third recessed plate 203, first top recessed plate 204, second top recessed plate 205, and third top recessed plate 206.
[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only used to illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all such changes and improvements fall within the scope of the present utility model claimed.
Claims
1. A corrugated paper folding house, characterized in that: The invention comprises a middle house (100), wherein the middle house (100) comprises a top left plate (1), the left side of the top left plate (1) is movably connected to a top right plate (3), the left side of the top right plate (3) is installed with a right side plate (4), the right side of the top left plate (1) is installed with a left side plate (2), the bottom of the right side of the right side plate (4) is installed with a bottom right plate (6), the right side of the bottom right plate (6) is movably connected to a bottom left plate (5), and the right side of the bottom left plate (5) is installed at the bottom of the left side of the left side plate (2).
2. The corrugated paper folding house according to claim 1, characterized in that: The back sides of the top left plate (1), the top right plate (3), the bottom left plate (5) and the bottom right plate (6) are all movably connected to the side panels (10), and the side panels (10) include a front top plate (7), a front left plate (8) and a front right plate (9); the top of the front side of the front top plate (7) is movably connected to the back sides of the top left plate (1) and the top right plate (3); the bottom of the front side of the front left plate (8) is movably connected to the back side of the bottom left plate (5); the bottom of the front side of the front right plate (9) is movably connected to the back side of the bottom right plate (6); and the left side of the front left plate (8) and the right side of the front right plate (9) are both movably connected to the two sides of the bottom of the front top plate (7).
3. The corrugated paper folding house according to claim 1, characterized in that: The front sides of the top left plate (1), the top right plate (3), the bottom left plate (5) and the bottom right plate (6) are all movably connected to the front side plate (20), and the front side plate (20) includes a left door plate (21) and a right door plate (22), the left side of the left door plate (21) is movably connected to the right side of the right door plate (22), the back side of the left door plate (21) is movably connected to the front sides of the top left plate (1), the left side plate (2) and the bottom left plate (5), and the back side of the right door plate (22) is movably connected to the front sides of the top right plate (3), the right side plate (4) and the bottom right plate (6).
4. The corrugated paper folding house according to claim 1, characterized in that: The left house (200) and the right house (300) are installed on the right and left sides of the middle house (100) respectively, and the left house (200) and the right house (300) include an inner recessed plate one (201), the inner side of the inner recessed plate one (201) is movably connected to an inner recessed plate two (202), the inner side of the inner recessed plate two (202) is movably connected to an inner recessed plate three (203), the top of the inner recessed plate one (201) is movably connected to a top recessed plate one (204), the inner side of the top recessed plate one (204) is movably connected to a top recessed plate two (205), the front side of the top recessed plate two (205) is movably connected to the back side of the inner recessed plate two (202), the inner side of the top recessed plate two (205) is movably connected to a top recessed plate three (206), and the front side of the top recessed plate three (206) is movably connected to the back side of the inner recessed plate three (203).
5. The corrugated paper folding house according to claim 1, characterized in that: Slots are provided on the left side of the inner cavity of the top right plate (3), the right side of the inner cavity of the top left plate (1), the top and bottom of the inner cavities of the left plate (2) and the right plate (4), the left side of the inner cavity of the bottom right plate (6), the right side of the inner cavity of the bottom left plate (5), the top and bottom of the left side of the inner cavity of the left house (200), and the top and bottom of the right side of the inner cavity of the right house (300). The slots are arranged in a circular structure and are in multiple numbers.
6. The corrugated paper folding house according to claim 1, characterized in that: The inner cavities of the bottom left plate (5), the bottom right plate (6), the right side plate (4), the left side plate (2), the top left plate (1), the top right plate (3), the left house (200) and the right house (300) are all movably connected with a connecting piece (11); the inner side of the surface of the connecting piece (11) is movably connected with an accessory one (403); the outer side of the surface of the connecting piece (11) is movably connected with an accessory two (404); the inner cavities of the connecting piece (11) and the accessory one (403) are all movably connected with a nut rod (401); the outer side of the inner cavity of the nut rod (401) is threadedly connected with a threaded rod (402); the outer side of the nut rod (401) is tightly fitted to the inner side of the accessory one (403); and the inner side of the threaded rod (402) is tightly fitted to the outer side of the accessory two (404).
7. The corrugated paper folding house according to claim 2, characterized in that: The top left plate (1), the left side plate (2), the top right plate (3), the right side plate (4), the bottom left plate (5) and the bottom right plate (6) are arranged in a trapezoidal structure as a whole, and the front top plate (7), the front left plate (8) and the front right plate (9) are arranged in a triangular structure.