M317734 八、新型說明： [新型所屬之技術領域】 本創作係關於一種電腦殼體，尤指一種具有導風罩之 電腦殼體。 [先前技術】 一般電腦殼體中均針對中央處理器（CPU)設置有散 熱裝置，通常使用的散熱裝置係由散熱器與風扇組合而 成，散熱器其中一表面與電子元件接觸，另一表面形成複 數散熱鰭片，該等散熱鰭片之間形成氣流流道，風扇設於 與該散熱器氣流流道相通之一側，從而加快其熱對流速 度。惟，隨著電腦技術的發展，其運行速度日益增加，所 產生之熱量亦隨之增加，採用上述散熱方式容易產生熱氣 流回流現象，影響散熱效率，造成系統不穩定或者當機等 現象；尤其對於伺服器系統，由於其内裝設較多之電子元 件，在長時間運行過程中會產生大量熱量，普通散熱裝置 已經不能滿足電腦性能之需要。為解決上述問題，一般於 電腦殼體内設置一導風罩。導風罩罩設於散熱裝置上方， 並藉由多顆螺絲與電腦殼體上對應之固定孔配合鎖固於 散熱裝置上。該導風罩可借助CPU散熱風扇將機箱外部之 冷空氣快速地抽入到機箱内部，令外部冷氣流更為直接且 集中地針對CPU進行有效之散熱。然而此種導風罩係利用 螺絲固定，組裝拆卸時均需要輔助工具，操作過程繁瑣； 另外，經過多次組裝拆卸後，螺絲内之螺紋可能遭到破 壞，再組裝時會因為固定不緊密而導致電腦工作振動時螺 M317734 絲脫落，存在不安全隱患。 【新型内容】 鑒於以上内容，有必要提供一種結構簡單，拆裝方便 之具有導風罩之電腦殼體。 一種具有導風罩之電腦殼體，包括一背板及一裝設於 該背板上的導風罩，該背板設有至少一卡合部，該導風罩 設有至少一用於與該卡合部對應卡合的通孔，該導風罩的 頂板後端突設形成至少一固定部，該背板對應該固定部開 設有至少一使該固定部對應插入的通孔。 相較于習知技術，本創作具有導風罩之電腦殼體利用 背板上的卡合部及導風罩上的固定部將導風罩固持於電 腦殼體上，其結構簡單、操作方便，提升了具有導風罩之 電腦殼體的安裝效率。 【實施方式】 請參閱圖1，本創作具有導風罩之電腦殼體之較佳實 • 施方式包括一背板10及一裝設於該背板10上的導風罩 20 ° 該背板10對應該導風罩20開設有三通風口 11，每一 通風口 11由不同的圓環組成。該背板10的上、下邊緣分 別向前彎折形成一折邊12、13，該折邊12向下後又向前 彎折，分別形成一下折邊14及一前折邊15，該下折邊14 在大致對應該通風口 11處等距離地開設有三通孔16，且 該通孔16延伸至該折邊12及前折邊15上，該前折邊15 在其前端邊緣處突設有兩向上凸起的卡合部17。一裝設於 7 M317734 電腦殼體内的主機板30抵接在該折邊13上。 該導風罩20大致呈梯形，其具有一頂板21，該頂板 21具有一較小的前端及一較大的後端，該頂板21的後端 ’ 對應該通孔16突設有三固定部23,該固定部23的延伸方 向與該背板10相垂直，且該固定部23的延伸方向與該卡 合部17的凸起方向相垂直，該頂板21的後部對應該卡合 部17開設有兩通孔22，該頂板21的後部支撐在該背板 10的前折邊15上。 請一併參閱圖2，安裝時，將該導風罩20的後端對準 該背板10上的通風口 11，使該導風罩20的固定部23插 入到該背板10的通孔16中，向下移動該導風罩20使得 該導風罩20上的通孔22套住折邊15上的卡合部17，這 樣該背板10與該導風罩20卡合。如此，藉由該固定部23 插入到該通孔16中及該卡合部17卡合於該通孔22中， 使得該導風罩20在前後、左右方向定位於該背板10上， • 再裝上電腦殼體的上蓋50,使該導風罩20在上下方向定 位於該背板10上，從而該導風罩20即可穩固地裝設於該 背板10上。該導風罩20藉由該通風口 11將電腦殼體内 的熱量散發出去，且不易産生回流現象。 在本實施方式中，該卡合部17也可爲其他突出物。 【圖式簡單說明】 圖1係本創作具有導風罩之電腦殼體之立體分解圖。 圖2係本創作具有導風罩之電腦殼體之立體組裝圖。 【主要元件符號:說明】 8 ，M317734 背 板 10 通 風 π 11 折 邊 12 折 邊 13 下 折 邊 14 前 折 邊 15 通 孔 16 卡 合 部 17 導 風 罩 20 頂 板 21 通 孔 22 固 定 部 23 主 機 板 30 上 蓋 50M317734 VIII. New description: [New technical field] This creation is about a computer case, especially a computer case with an air hood. [Prior Art] A general computer casing is provided with a heat dissipating device for a central processing unit (CPU). The commonly used heat dissipating device is a combination of a heat sink and a fan, one surface of the heat sink is in contact with the electronic component, and the other surface is A plurality of heat dissipation fins are formed, and air flow passages are formed between the heat dissipation fins, and the fan is disposed on one side of the airflow passage of the radiator to accelerate the heat convection speed. However, with the development of computer technology, its running speed is increasing, and the heat generated is also increased. The above-mentioned heat dissipation method is prone to generate hot air flow recirculation phenomenon, affecting heat dissipation efficiency, causing system instability or crashing; For the servo system, due to the large number of electronic components installed therein, a large amount of heat is generated during long-time operation, and the ordinary heat sink device cannot meet the performance requirements of the computer. In order to solve the above problem, an air hood is generally disposed in the computer casing. The air guiding hood is disposed above the heat dissipating device, and is locked to the heat dissipating device by a plurality of screws and corresponding fixing holes on the computer casing. The air hood can quickly draw the cold air outside the chassis into the interior of the chassis by means of a CPU cooling fan, so that the external cold air is more directly and centrally cooled for the CPU. However, such an air hood is fixed by screws, and an auxiliary tool is required for assembly and disassembly, and the operation process is cumbersome; in addition, after multiple assembly and disassembly, the thread in the screw may be damaged, and the assembly may be caused by the fixing. When the computer is working, the screw M317734 wire is detached, and there is an unsafe hidden danger. [New content] In view of the above, it is necessary to provide a computer case with a wind deflector that is simple in structure and convenient to assemble and disassemble. A computer case having an air hood, comprising a back plate and an air hood mounted on the back plate, the back plate is provided with at least one engaging portion, and the air hood is provided with at least one for The engaging portion corresponds to the through hole of the engaging portion, and the rear end of the top plate of the air guiding cover protrudes to form at least one fixing portion, and the back plate is provided with at least one through hole corresponding to the fixing portion. Compared with the prior art, the computer casing with the air hood of the present invention uses the engaging portion on the back plate and the fixing portion on the air guiding cover to hold the air guiding cover on the computer casing, and has the advantages of simple structure and convenient operation. The installation efficiency of the computer case with the air hood is improved. [Embodiment] Referring to Figure 1, a preferred embodiment of the computer housing having a wind deflector includes a backing plate 10 and a wind deflector 20° mounted on the backing plate 10. 10 pairs of air hoods 20 are provided with three vents 11, each of which is composed of a different ring. The upper and lower edges of the back plate 10 are respectively bent forward to form a folded edge 12, 13 which is bent downwardly and backwardly to form a lower folded edge 14 and a front folded edge 15 respectively. The flange 14 is provided with a three-way hole 16 equidistantly corresponding to the corresponding venting opening 11, and the through hole 16 extends to the flange 12 and the front flange 15, and the front flange 15 is protruded at the front end edge thereof. There are two upwardly projecting engaging portions 17. A motherboard 30 mounted in the 7 M317734 computer housing abuts the flange 13. The air hood 20 has a substantially trapezoidal shape and has a top plate 21 having a smaller front end and a larger rear end. The rear end of the top plate 21 has three fixing portions 23 corresponding to the through holes 16 . The extending direction of the fixing portion 23 is perpendicular to the backing plate 10, and the extending direction of the fixing portion 23 is perpendicular to the protruding direction of the engaging portion 17, and the rear portion of the top plate 21 is corresponding to the engaging portion 17. Two through holes 22, the rear portion of which is supported on the front flange 15 of the back plate 10. Referring to FIG. 2 together, the rear end of the air guiding cover 20 is aligned with the air vent 11 on the backing plate 10, so that the fixing portion 23 of the air guiding cover 20 is inserted into the through hole of the backing plate 10. In the 16th, the air hood 20 is moved downward so that the through hole 22 in the air hood 20 fits over the engaging portion 17 on the flange 15, so that the back plate 10 is engaged with the air hood 20. In this way, the fixing portion 23 is inserted into the through hole 16 and the engaging portion 17 is engaged with the through hole 22, so that the air guiding cover 20 is positioned on the back plate 10 in the front, rear, and left and right directions. The upper cover 50 of the computer case is further mounted, and the air hood 20 is positioned on the back plate 10 in the up and down direction, so that the air hood 20 can be stably mounted on the back plate 10. The air hood 20 dissipates heat in the computer casing through the vent 11, and is less likely to cause backflow. In the present embodiment, the engaging portion 17 may be another protrusion. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exploded perspective view of a computer housing having a wind deflector. 2 is an assembled, isometric view of a computer housing having an air hood. [Main component symbol: Description] 8 , M317734 Back plate 10 Ventilation π 11 Folding edge 12 Folding edge 13 Folding edge 14 Folding edge 15 Through hole 16 Engagement part 17 Air hood 20 Top plate 21 Through hole 22 Fixing part 23 Main unit Board 30 upper cover 50