The objects, features, advantages, and benefits of the invention will become apparent in the following description taken in conjunction with the foregoing drawings.
Referring to
The top wall 1 has a top reception plate 11 and a bottom reception plate 12, wherein the top reception plate 11 further has at lest one first insertion plate 111 on the top, at least one insertion notch 112 on the bottom, and a first folding edge 113 on the bottom. The top wall 1 further has a first double-folding section 114 on the center region between the insertion notch 112 and the first insertion plate 111. A first folding line 115 and a second folding line 116 are formed on both sides of the first double-folding section 114, respectively. Several first hooking holes 117 are formed between the first folding line 115 and the first insertion plate 111. Several second hooking holes 118 are formed between the second folding line 116 and the insertion notch 112. Two first positioning hems 119 are formed on both sides of the top reception plate 11, respectively. The aforesaid first double-folding section 114, the first folding line 115, and the second folding line 116 jointly allow the top reception plate 11 to be foldable. After folding, the first insertion plate 111 can be correspondingly inserted into the insertion notch 112, and the first hooking holes 117 and the second hooking holes 118 are located in positions corresponding to one another. The top of the bottom reception plate 12 can be bent by means of the first folding edge. 113 to connect with the top reception plate 11. In addition, the bottom reception plate 12 has a second folding edge 121 on the bottom. A third folding edge 122 is formed between the second folding edge 121 and the first folding edge 113. The bottom reception plate 12 further has two first insertion holes 123 penetrating through both sides, respectively.
The top of the ventilation part 2 can be bent by means of the second folding edge 121 to connect with the top wall 1. The ventilation part 2 has a fourth folding edge 21 on the bottom. The ventilation part 2 has a first ventilation hole 22 penetrating through the region between the fourth folding edge 21 and the second folding edge 121, wherein a first ventilation device 23 is connected with the first ventilation hole 22. Two second positioning hems 24 are formed on both sides of the first ventilation hole 22, respectively. Two fifth folding edges 241 are formed on the bottoms of the second positioning hems 24, respectively. Two second insertion holes 242 are formed on the center regions of the fifth folding edges 241, respectively.
The bottom wall 3 has a bottom plate 31 on the center. The bottom plate 31 has a ventilation folding plate 32 on the top and two lateral folding plates 33 on both sides, respectively. The bottom plate 31 has a bottom folding plate 34 on the bottom. The top of the ventilation folding plate 32 can be bent by means of the aforesaid fourth folding edge 21 to connect with the ventilation part 2. The ventilation folding plate 32 has two first positioning plates 321 protruding from both sides, respectively. The ventilation folding plate 32 has a sixth folding edge 322 on the bottom. The bottom wall 3 has at least one second ventilation hole 323 penetrating therethrough the region between the sixth folding edge 322 and the fourth folding edge 21. Each lateral folding plate 33 has a second insertion plate 331 at the outer border and a seventh folding edge 332 on the bottom. The bottom wall 3 has a second insertion hole 333 penetrating through the seventh folding edge 332. In addition, a second double-folding section 334 is formed on the center region between the seventh folding edge 332 and the second insertion plate 331. Each second double-folding section 334 has a first folding line 335 and a second folding line 336 on both sides, respectively. Each lateral folding plate 33 has a second positioning plate 337 and a third positioning plate 338 protruding from one side. The aforesaid bottom folding plate 34 has several third insertion plates 341 protruding from the bottom and an eighth folding edge 342 on the top. In addition, the bottom folding plate 34 has a third insertion hole 343 penetrating through the eighth folding edge 342. A third double-folding section 344 is formed on the center region between the third insertion hole 343 and the third insertion plates 341. The third double-folding section 344 has a first folding line 345 and a second folding line 346 on both sides, respectively.
The support plates 4, which are for connection with respective both sides of the top wall 1 and the ventilation part 2, are located on the bottom wall 3. Each support plate 4 has a first protruding plate 41 protruding from on the top. The first protruding plate 41 has a folding line 42 on the bottom and a positioning hole 43 penetrating through the folding line 42. The positioning hole 43 is located correspondingly to the aforesaid first positioning fin 119. Each support plate 4 has a second protruding plate 44 and a third protruding plate 45 protruding from one side and corresponding to the first and second insertion holes 123 and 242, respectively.
The backing plate 5 has two vertical plates 51 on both sides, respectively, and at least one through hole 52 penetrating through one surface. In addition, a second ventilation device 53 is connected to the through hole 52.
The assembled structures of the aforesaid components are shown in
By bending the fourth folding edge 21, the ventilation part 2 is located on the bottom wall 3, and the support plates 4 and the backing plate 5 are located between the ventilation part 2 and the bottom wall 3. By bending the fifth folding edge 241, the second positioning hems 24 can be inserted into the respective one side of the respective lateral folding plates 33, and the ventilation part 2 is positioned on the bottom wall 3. By bending the second folding edge 121 and the third folding edge 122, the top reception plate 11 and the bottom reception plate 12 can be attached to the outer surface of the bottom wall 3. In addition, the first positioning hems 119 are bent to be inserted into the second insertion holes 333, respectively, from the other side.
In the opening mode, as shown in
The utilization status of the aforesaid components is shown in