M407968 五、新型說明： 【新型所屬之技術領域】 本新型疋有關於一種導正結構(Guiding Structure)，且 特別是有關於一種風扇模組之導正銷(p i n)與系統模組之機 殼。 【先前技術】 在一系統模組中，為了降低系統運轉時的溫度，通常 會在系統模組中裝設風扇模組。請參照第1圖，其係繪示 一種傳統風扇模組之機架與系統模組之機殼的部分裝置示 意圖。系統模組之機殼100具有底板102與至少一侧牆 104 ’其中侧牆1〇4立設在底板1〇2之側緣上。系統模組之 機殼100 —般更包含有數個定位銷1〇6。這些定位銷ι〇6 固設在機殼100之底板1〇2上’且突出於底板102之表面 上。 • 風扇模組包含有機架（Cage)l〇8。一般而言，為提供更 f強大的散熱效能’機架108具有多個容置空間11〇，而每 個容置空間110可供一風扇設置於其中。風扇模組之機架 108可與系統模組之機殼1〇〇結合，而固定在機殼1〇〇所 定義出的内部空間内。通常，風扇模組之機架1〇8的側面 ”與機殼100之側牆104結合，而風扇模組之機架1〇8的底 —部則與機殼100之底板102結合。 目前’為了將風扇模組之機架1〇8的底部與機殼1〇〇 之底板102結合’並有效定位風扇模組之機架ι〇8在機殼 100内的位置，風扇模組之機架108的底部設有數個定位 4 M407968 孔m。這些定位孔m之位置與數量和機殼1〇〇之底板 102上所設置的定位銷1G6之位置與數量相對應。如此， 將風扇模組δ又置在糸統核組之機殼1 〇〇中時，底板1 〇2上 的定位銷Η)6可分卿應穿設錢純組之齡⑽底部 的定位孔Η2 +，而有效定位機架⑽在機殼刪中的位 置。 此外’由於風扇運轉時，大都會產生震動，因此風扇 模組之機架⑽更包含有數個環型之_塾114。_⑽ 中之每個定位孔m均對應設有—緩㈣u4，因此這些緩 衝塾114之數量與機架108之定位孔112的數量相同。緩 衝塾114設置在定位孔112之周緣上。如此-來，在風扇 模組中之風扇運轉時’緩㈣114可提供減震效果，進而 可降低風扇模組之震動對系統模組所造成的衝擊。 為了提供緩衝效果，緩衝塾114通常係 的材 將風扇模組之機架108楚設於機殼108 U位孔112並未準確對齊機殼108 上的定位銷106，風扇模組之定位孔U2與系 m立銷1〇6常會發生互相干涉的現象。這樣的干 將導致軟質的緩衝墊114自機架⑽之定位孔112 中脫落，不利於組裝作業的進行。 【新型内容】 正舖因：且型之一態樣就是在提供-種風扇模組之導 陷之一環狀凹槽區。如此-來，當此 〜風扇模組之機架的導正孔中時，環狀凹槽區 5 M407968 與機架之間具有一緩衝空間，而可大幅降低風扇機架碰撞 到導正銷的機會，進而可有效避免風扇機架與導正銷之間 的相互干涉。 „ 本新型之另一態樣是在提供一種系統模組之機殼，其 具有至少一導正銷。由於此導正銷之高度定位銷高，因此 '在農設風扇機架時’籍由突出於定位銷之導正銷的引導與 ‘定位’可使定位銷m利進入而穿設於風扇機架之定位孔的 環型缓衝墊中。故’可有效避免缓衝墊脫落的問題，而可 Φ)降低風扇機架裝設之困難度’進而可提升生產效率。 根據本新型之上述目的，提出一種風扇模組之導正 銷’適用以設置在一系統模組之一機殼上，以導引機殼之 複數個定位銷分別對應穿設於風扇模組之一機架之複數個 定位孔中。此導正銷包含一導引部以及一凹槽部。此凹槽 部接合在導引部之底部。其中，凹槽部之内徑小於導引部 之内徑’以在導正銷位於機架之導正孔中時，使機架與凹 槽部之間具有一緩衝間隙。 • 依據本新型之一實施例，上述之導引部包含一導角結 」構設於導引部之頂部周緣。 依據本新型之另一實施例，上述之導正銷之高度大於 每一定位銷之1¾度。 根據本新型之上述目的，另提出一種系統模組之機 殼，適用以裝載一風扇模組。此系統模組之機殼包含一底 板、複數個定位銷、以及至少一導正銷。底板可承載風扇 模組。前述之定位銷設置在底板上。至少一導正銷設置在 底板上，以導引前述之定位銷分別對應穿設於風扇模組之 6 M407968 一機架之複數個定位孔中。其中，前述之至少一導正銷可 對應穿設在機架之至少一導正孔中，且導正銷之高度大於 每一定位銷之高度。 依據本新型之一實施例，上述之至少一導正銷包含一 . 導引部、以及一凹槽部。凹槽部接合在導引部之底部。其 中，凹槽部之内徑小於導引部之内徑，以在前述之至少一 . 導正銷位於機架之至少一導正孔中時，使機架與凹槽部之 . 間具有一缓衝間隙。 •本新型之優點為風扇模組之導正銷具有向内凹陷之凹 槽區。因此，導正銷穿設在風扇模組之機架的導正孔中時， 凹槽區與機架之間具有緩衝空間，而可降低風扇機架碰撞 到導正銷的機會，進而可避免風扇機架之震動經由導正銷 而傳遞至系統模組。 本新型之另一優點為系統模組之機殼具有至少一導正 銷。由於此導正銷之高度較定位銷高，因此在裝設風扇機 架時，透過較突出之導正銷的引導與定位，可使定位銷順 Φ利穿設於風扇機架之定位孔的環型緩衝墊中。故，可有效 •避免缓衝墊脫落的問題，而可降低風扇機架裝設之困難 度，進而可提升生產效率。 _【實施方式】 請參照第2圖〃其係繪示依照本新型之一實施方式的 一種風扇模組之機架與系統模組之機殼的部分裝置示意 圖。系統模組一般包含數個電子元件（未繪示）、與裝载這 些電子元件之機殼200。此外，為了降低這些電子元件運 7 M407968 轉時的溫度，系統模組通常更設有風扇模組，來強化系統 模組與外界環境之間的熱對流。而風扇模組同樣可裳設於 機殼200内。 - 、°又、 在一實施例中，系統模組之機殼200包含底板2〇2、 -數個定位銷206、以及一或多個導正銷216。在另一實施例 —.中’如第2圖所示’機殼200更可根據產品需求而包含有 •至少一側牆204。側牆204可立設在底板202之側緣上。 •系統模組之電子元件與風扇模組均可設置於機殼200之底 #板202上。 定位銷206設置在機殼200之底板202上，用以將固 定風扇模組的位置。導正銷216亦設置於機殼200之底板 2〇2上’用以導引定位銷206與風扇模組之結合。在一實 施例中，如第2圖所示導正銷216較佳係鄰近於至少一個 定位銷206。此外，如第3A圖至第3C圖所示，導正銷216 之高度較佳係大於定位銷206之高度，以利導引風扇模組 與定位銷206的結合。 • 在一實施例中，請參照第3A圖至第3C圖，導正銷216 可包含導引部220與凹槽部222。凹槽部222接合在導引 部220之底部。在一例子中，凹槽部222與導引部220可 為一體的結構’亦即導正銷216係一體成型的結構。在另 • 一例子中，凹槽部222與導引部220可為二獨立的結構， .但凹槽部222固接在導引部220之底部。 在本實施方式中，導引部220之内徑大於凹槽部222 之内徑，亦即相較於導引部220，凹槽部222朝内凹陷， 而此導正銷216形成一類酒杯狀結構。在一實施例中’導 M407968 引部220更可包含導角結構224，此導角結構224設置在 導引部220之頂部的周緣。在一例子中，如第3a圖所示， 導角結構224可為圓角。 請再次參照第2圖，風扇模組主要可包含機架208、 •以及至少一風扇（未繪示）。機架208可定義出數個容置空 _ .間210，而每個容置空間210可供一風扇設置於其中。因 .此，風扇模組可包含數個風扇，以提供更強大的熱對流效 能。風扇換組之機架208的側面可與機殼200之側牆204 φ結合，機架208之底部則可與底板202結合，而固定在機 殼200的内部空間中。 配合機殼200之底板202上的導正銷216與定位銷 206 ’機架208之底部設有導正孔218與定位孔212。其中， 這些導正孔218與定位孔212之位置與數量和底板2〇2上 所設置的導正銷216與定位銷206之位置與數量相對應。 在一些例子中，風扇模組之機架2〇8更包含有數個環 塑之缓衝墊214。這些緩衝墊214分別對應環設在機架208 •之定位^ 212的周緣上。緩衝墊214可由軟質之材料所組 .成，以提供較佳蛉緩衝效果。在風扇運轉時，緩衝墊214 可提供減震效果，而可避免風扇模組之運轉對系統模組造 成千涉。 • 咕參照第3A圖至第3C圖，其係繪示依照本新型之一 實施=式#帛風扇模組之機架裝^於系統模组之機殼上 之邠刀。j面々IL程圖。將風扇模組之機架組裝在機殼3㈨ 上時’可先將機架208之導正孔抓對齊機殼2〇0之導正 顧216由於‘正銷216高於定位銷206，因此導正孔218 9 M407968 較容易對準導正銷216。接著，如第3A圖所示，將機架 208朝機殼200之底板202的方向移動，使機架208之導 正孔218的周緣與導正銷216接合。由於導正銷216之導 引部220的頂部具有導角結構224，因此可使機架208順 . 利滑入導正銷21(5。 _ 接下來’猎由機架208之導正孔218與導正銷216之 *導引部220的導引’可使定位銷206分別準確地穿入機架 .208之對應定位孔212中的缓衝墊214内，如第3B圖所示。 •如此一來，可使機殼2〇〇之定位銷206與機架208之定位 孔212中的緩衝墊214順利結合，而可避免機架2〇8之缓 衝墊214在組裝過程中脫落。當定位銷2〇6穿設於機架2〇8 之定位孔2i2中之後，不僅可將風扇模組之機架2〇8與機 殼200結合，更可有效定位風扇模組之機架·在機殼2〇〇 内的位置。 接者，在導引部220的引導之下，機架2〇8之導正孔 川套在導肖加之凹槽部222外圍。此時，導正銷加 穿設於導正孔218中。由於，導正鎖216之凹槽部222的 内徑小於導引部22〇之内徑，而相部⑽，凹槽 部222係'朝内凹陷。因此，如第3C圖所示，導正銷216 牙β又於導正孔218中之後’導正孔218周緣之機架2〇8與 ==\216之凹槽# 222之間可具有緩衝間隙226。在此 緩，：隙226存在的情ί兄下，外界環境之震動或風扇運轉 所產生之震動不會經由機架208而傳遞至機殼之導正 銷2=。因此，可避免風屬模組經 ι6而與系統 模組產生干涉。 η M407968 由上述之實施方式可知，本新型之一優點就是因為風 扇模組之導正銷具有向内凹陷之環狀凹槽區。因此，當導 正銷穿設於風扇模組之機架的導正孔中時，環狀凹槽區與 機架之間具有緩衝空間，而可大幅降低風扇機架碰撞到導 • 正銷的機會，進而可有效避免風扇機架與導正銷之間的相 • 互干涉。 . 由上述之實施方式可知，本新型之另一優點就是因為 系統模組之機殼具有至少一導正銷。由於此導正銷之高度 定位銷高，因此在裝設風扇機架時，藉由突出於定位銷之 ^ 導正銷的引導與定位，可使定位銷順利進入而穿設於風扇 機架之定位孔的環型緩衝墊中。故，可有效避免緩衝墊脫 落的問題，而可降低風'扇機架裝設之困難度，進而可提升 生產效率。 •3 雖然本新型已以實施方式揭露如上，然其並非用以限 定本新型，任何在此技術領域中具有通常知識者，在不脫 離本新型之精神和範圍内，當可作各種之更動與潤飾，因 此本新型之保護範圍當視後附之申請專利範圍所界定者為 準。 【圖式簡單說明】 為讓本新型之上述和其他目的、特徵、優點與實施例 能更明顯易懂，所附圖式之說明如下： 第1圖係繪示一種傳統風扇模組之機架與系統模組之 機殼的部分裝置示意圖。 第2圖係繪示依照本新型之一實施方式的一種風扇模 11 M407968 組之機架與系統模組之機殼的部分裝置示意圖。 第3A圖至第3C圖係繪示依照本新型之一實施方式的 一種風扇模組之機架裝設於系統模組之機殼上之部分剖面 流程圖。 【主要元件符號說明】 100 : 機殼 102 ： 底板 104 ： 側牆 106 ： 定位銷 .108 : 機架 110 ： 容置空間 112 ： 定位孔 114 ： 緩衝墊 200 ： 機殼 202 ： 底板 204 ： 側牆 206 ： 定位銷 208 ： 機架 210 ： 容置空間 212 ： 定位孔 214 ： 緩衝墊 216 ： 導正銷 218 ： 導正孔 220 ： 導引部 222 ： 凹槽部 224 : 導角結構 226 ： 緩衝間隙 12M407968 V. New description: [New technical field] The new type is related to a Guiding Structure, and in particular to a casing of a fan module and a system module. . [Prior Art] In a system module, in order to reduce the temperature during system operation, a fan module is usually installed in the system module. Please refer to FIG. 1 , which is a partial schematic view of a chassis of a conventional fan module and a system module. The casing 100 of the system module has a bottom plate 102 and at least one side wall 104', wherein the side walls 1〇4 are erected on the side edges of the bottom plate 1〇2. The housing 100 of the system module generally includes a plurality of positioning pins 1〇6. These positioning pins ι6 are fixed to the bottom plate 1'' of the casing 100 and protrude from the surface of the bottom plate 102. • The fan module contains a rack (cage) l〇8. In general, in order to provide more powerful heat dissipation performance, the rack 108 has a plurality of accommodating spaces 11 〇, and each accommodating space 110 is provided with a fan therein. The frame 108 of the fan module can be coupled to the casing 1 of the system module and fixed in the internal space defined by the casing 1〇〇. Generally, the side of the frame 1〇8 of the fan module is combined with the side wall 104 of the casing 100, and the bottom part of the frame 1〇8 of the fan module is combined with the bottom plate 102 of the casing 100. In order to combine the bottom of the frame 1〇8 of the fan module with the bottom plate 102 of the casing 1′ and effectively position the frame ι 8 of the fan module in the casing 100, the frame of the fan module The bottom of the 108 is provided with a plurality of positioning 4 M407968 holes m. The position and number of the positioning holes m correspond to the position and number of the positioning pins 1G6 provided on the bottom plate 102 of the casing 1 . Thus, the fan module δ When it is placed in the casing 1 of the 核 核 nuclear group, the locating pin 66 on the bottom plate 1 〇2 can be divided into the positioning hole Η 2 + at the bottom of the age of the pure group (10), and the effective positioning machine The position of the frame (10) is deleted in the casing. In addition, the vibration of the fan module (10) contains a plurality of ring type _塾114. Correspondingly, there is a slow (four) u4, so the number of these buffers 114 is the same as the number of the positioning holes 112 of the frame 108. 114 is disposed on the periphery of the positioning hole 112. Thus, when the fan in the fan module is running, the slow (four) 114 can provide a shock absorbing effect, thereby reducing the impact of the vibration of the fan module on the system module. Providing a buffering effect, the buffering device 114 generally sets the frame 108 of the fan module to the casing 108. The U-position hole 112 is not accurately aligned with the positioning pin 106 on the casing 108, and the positioning hole U2 of the fan module is The phenomenon that the m pins 1〇6 often interfere with each other often causes the soft cushion 114 to fall out of the positioning hole 112 of the frame (10), which is not conducive to the assembly work. [New content] One aspect of the type is to provide an annular groove region of the guide bush of the fan module. Thus, when the fan module is in the guide hole of the frame, the annular groove region 5 The M407968 has a buffer space between the rack and the rack, which greatly reduces the chance of the fan rack colliding with the pilot pin, thereby effectively avoiding mutual interference between the fan frame and the pilot pin. „ Another state of the present invention Is providing a system module A shell having at least one pilot pin. Since the height of the guiding pin is high, the guiding and 'positioning' of the guiding pin protruding from the positioning pin can make the positioning pin enter and pass through the fan machine. The positioning hole of the frame is in the ring cushion. Therefore, the problem of the detachment of the cushion can be effectively avoided, and the difficulty of installing the fan frame can be reduced φ, thereby improving the production efficiency. According to the above object of the present invention, a guide pin of a fan module is provided to be disposed on a casing of a system module, so as to guide a plurality of positioning pins of the casing correspondingly to the fan module. A plurality of positioning holes in a frame. The guiding pin comprises a guiding portion and a groove portion. This groove portion is joined to the bottom of the guide portion. Wherein, the inner diameter of the groove portion is smaller than the inner diameter of the guide portion to provide a buffer gap between the frame and the groove portion when the guide pin is located in the guide hole of the frame. • According to an embodiment of the present invention, the guiding portion includes a lead angle node disposed on a top periphery of the guiding portion. In accordance with another embodiment of the present invention, the height of the pilot pin described above is greater than 13⁄4 degrees of each of the locating pins. According to the above object of the present invention, a casing of a system module is further provided for loading a fan module. The casing of the system module includes a bottom plate, a plurality of positioning pins, and at least one guiding pin. The base plate can carry a fan module. The aforementioned positioning pin is disposed on the bottom plate. At least one guiding pin is disposed on the bottom plate, so as to guide the positioning pins to be respectively disposed in a plurality of positioning holes of a frame of the 6 M407968 of the fan module. The at least one guiding pin can be correspondingly disposed in at least one guiding hole of the frame, and the height of the guiding pin is greater than the height of each positioning pin. According to an embodiment of the present invention, the at least one guiding pin comprises a guiding portion and a groove portion. The groove portion is joined to the bottom of the guide portion. Wherein the inner diameter of the groove portion is smaller than the inner diameter of the guiding portion, so that at least one of the guiding pins is located in at least one guiding hole of the frame, so that the frame and the groove portion have a Buffer gap. • The advantage of the present invention is that the pilot pin of the fan module has a recessed area that is recessed inward. Therefore, when the guiding pin is inserted into the guiding hole of the frame of the fan module, there is a buffer space between the groove area and the frame, which can reduce the chance of the fan frame colliding with the guiding pin, thereby avoiding The vibration of the fan frame is transmitted to the system module via the pilot pin. Another advantage of the present invention is that the housing of the system module has at least one pilot pin. Since the height of the guiding pin is higher than that of the positioning pin, when the fan frame is installed, the guiding pin can be traversed by the guiding hole of the fan frame through the guiding and positioning of the protruding guiding pin. In the ring cushion. Therefore, it can effectively avoid the problem that the cushion is detached, and the difficulty of installing the fan frame can be reduced, thereby improving the production efficiency. [Embodiment] Please refer to FIG. 2, which is a schematic view showing a part of a casing of a fan module and a system module according to an embodiment of the present invention. The system module typically includes a plurality of electronic components (not shown) and a housing 200 for loading the electronic components. In addition, in order to reduce the temperature of these electronic components, the system module usually has a fan module to enhance the thermal convection between the system module and the external environment. The fan module can also be disposed in the casing 200. - In addition, in an embodiment, the housing 200 of the system module includes a bottom plate 2, 2, a plurality of positioning pins 206, and one or more guiding pins 216. In another embodiment - as shown in Fig. 2, the casing 200 may further include at least one side wall 204 according to product requirements. The side walls 204 may be erected on the side edges of the bottom plate 202. • The electronic components and fan modules of the system module can be disposed on the bottom plate #202 of the casing 200. The positioning pin 206 is disposed on the bottom plate 202 of the casing 200 for fixing the position of the fan module. The guiding pin 216 is also disposed on the bottom plate 2〇2 of the casing 200 for guiding the combination of the positioning pin 206 and the fan module. In one embodiment, the pilot pin 216 is preferably adjacent to the at least one locating pin 206 as shown in FIG. In addition, as shown in FIGS. 3A-3C, the height of the guiding pin 216 is preferably greater than the height of the positioning pin 206 to guide the combination of the fan module and the positioning pin 206. • In an embodiment, referring to FIGS. 3A-3C, the guiding pin 216 may include a guiding portion 220 and a groove portion 222. The groove portion 222 is joined to the bottom of the guide portion 220. In one example, the groove portion 222 and the guide portion 220 may be a unitary structure, that is, the guide pin 216 is integrally formed. In another example, the groove portion 222 and the guiding portion 220 may be two separate structures, but the groove portion 222 is fixed to the bottom of the guiding portion 220. In the present embodiment, the inner diameter of the guiding portion 220 is larger than the inner diameter of the groove portion 222, that is, the groove portion 222 is recessed inward compared to the guiding portion 220, and the guiding pin 216 forms a wine glass shape. structure. In an embodiment, the lead M220968 may further include a lead structure 224 disposed at a periphery of the top of the guide 220. In one example, as shown in Figure 3a, the lead structure 224 can be rounded. Referring again to FIG. 2, the fan module may mainly include a rack 208, and at least one fan (not shown). The rack 208 can define a plurality of accommodation spaces 210, and each of the accommodation spaces 210 can be provided with a fan therein. Because of this, the fan module can contain several fans to provide more powerful heat convection. The side of the fan-replacement frame 208 can be combined with the side wall 204 φ of the casing 200, and the bottom of the frame 208 can be combined with the bottom plate 202 to be fixed in the inner space of the casing 200. The guiding pin 216 on the bottom plate 202 of the casing 200 and the bottom of the positioning pin 206' frame 208 are provided with a guiding hole 218 and a positioning hole 212. The positions and numbers of the guiding holes 218 and the positioning holes 212 and the positions and numbers of the guiding pins 216 and the positioning pins 206 provided on the bottom plate 2〇2 correspond to the positions and numbers of the guiding pins 216 and the positioning pins 206. In some examples, the frame 2〇8 of the fan module further includes a plurality of cushioned cushions 214. These cushions 214 are respectively disposed on the circumference of the positioning hole 212 of the frame 208. The cushion 214 can be constructed of a soft material to provide a better cushioning effect. When the fan is running, the cushion 214 can provide a shock absorbing effect, and the operation of the fan module can be avoided to cause a lot of problems in the system module. • Referring to Figures 3A through 3C, the boring tool mounted on the casing of the system module in accordance with one of the present invention is shown. j face 々 IL process map. When the frame of the fan module is assembled on the casing 3 (9), the guide hole of the frame 208 can be firstly aligned with the guide 2 〇 0. Since the positive pin 216 is higher than the positioning pin 206, the guide pin 216 is higher than the positioning pin 206. The positive hole 218 9 M407968 is easier to align with the pilot pin 216. Next, as shown in Fig. 3A, the frame 208 is moved in the direction of the bottom plate 202 of the casing 200, and the peripheral edge of the guide hole 218 of the frame 208 is engaged with the guide pin 216. Since the top of the guiding portion 220 of the guiding pin 216 has the angle guiding structure 224, the frame 208 can be smoothly slid into the guiding pin 21 (5. _ Next 'hunting by the guiding hole 218 of the frame 208 The guiding of the guiding portion 220 of the guiding pin 216 can accurately penetrate the positioning pin 206 into the cushion 214 in the corresponding positioning hole 212 of the frame 208, as shown in FIG. 3B. In this way, the positioning pin 206 of the casing 2 can be smoothly combined with the cushion 214 in the positioning hole 212 of the frame 208, and the cushion 214 of the frame 2〇8 can be prevented from falling off during assembly. After the positioning pin 2〇6 is inserted into the positioning hole 2i2 of the frame 2〇8, the frame 2〇8 of the fan module can be combined with the casing 200, and the frame of the fan module can be effectively positioned. In the position inside the casing 2, the guide hole is guided by the guiding portion 220, and the guiding hole of the frame 2〇8 is sleeved around the guiding portion 222. At this time, the guiding pin The insertion portion is provided in the guide hole 218. Since the inner diameter of the groove portion 222 of the guide lock 216 is smaller than the inner diameter of the guide portion 22, and the phase portion (10), the groove portion 222 is recessed inward. As the third As shown in FIG. C, the guide pin 216 tooth β may be in the guide hole 218 and may have a buffer gap 226 between the frame 2〇8 of the circumference of the guide hole 218 and the groove #222 of ==\216. In this case, the vibration of the external environment or the vibration generated by the fan operation will not be transmitted to the guide pin 2 of the casing via the frame 208. Therefore, the wind module can be avoided. Interference with the system module via ι6. η M407968 According to the above embodiment, one of the advantages of the present invention is that the pilot pin of the fan module has an annular recessed area that is recessed inward. Therefore, when the pilot pin When passing through the guide hole of the frame of the fan module, there is a buffer space between the annular groove area and the frame, which can greatly reduce the chance of the fan frame colliding with the guide pin, thereby effectively avoiding The mutual interference between the fan frame and the guiding pin. According to the above embodiment, another advantage of the present invention is that the casing of the system module has at least one guiding pin. The height of the positioning pin is high, so when installing the fan frame, by highlighting The guide and positioning of the pin guide pin can make the locating pin enter smoothly and pass through the ring-shaped cushion pad of the positioning hole of the fan frame. Therefore, the problem of the detachment of the cushion pad can be effectively avoided, and the wind can be reduced. The difficulty of installing the fan rack can further improve the production efficiency. 3 Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any person having ordinary knowledge in the technical field does not deviate from In the spirit and scope of the present invention, the various modifications and refinements may be made, and the scope of protection of the present invention is subject to the definition of the scope of the appended claims. [Simplified Schematic] Other objects, features, advantages and embodiments can be more clearly understood. The description of the drawings is as follows: FIG. 1 is a schematic view showing a part of a casing of a conventional fan module and a system module. 2 is a partial schematic view of a casing of a frame and system module of a fan mold 11 M407968 according to an embodiment of the present invention. 3A-3C are partial cross-sectional views showing a rack of a fan module mounted on a casing of a system module in accordance with an embodiment of the present invention. [Main component symbol description] 100 : Case 102 : Base plate 104 : Side wall 106 : Locating pin .108 : Rack 110 : accommodating space 112 : Locating hole 114 : Cushion 200 : Case 202 : Base plate 204 : Side wall 206 : Locating pin 208 : Rack 210 : accommodating space 212 : positioning hole 214 : cushion 216 : guiding pin 218 : guiding hole 220 : guiding portion 222 : groove portion 224 : lead angle structure 226 : buffer gap 12