200822842 九、發明說明·· 【發明所屬之技術領域】 一種擴充卡固持機構，尤指一種用以固定電性插設於 電子裝置中之擴充卡之端邊之固持機構。 【先前技術】 請參閱第1圖，PCI支架1可供插接多片擴充卡，以 將該些擴充卡轉插至伺服器（圖未示）中，而擴充卡可包 括一般長度之擴充卡或長度較長之長形擴充卡u，長形 擴充卡11由於長度較長，因此末端會受到重力牽引而彎 折，長期下來易造成損壞，因此伺服器中若要插設長形擴 充卡，相對的亦必須使pCI支架丨為加長之型式，且於 PCI支架1之末端必須設置具有可對應嵌合長形擴充卡u 之端邊之溝槽10,而為了防止長形擴充卡u滑出溝槽 ，可於該pci支架！之末端樞接一扣合件12，該扣曰合 件12係扣合於該PCI支架1對應該溝槽ίο之開放端而口將 該長形擴充卡11之端邊固定於該溝槽1〇中。 扣合件12係以例如為凸榫之結構扣合於該PCI支架 1對應該溝槽1G之開放端’然:而此種扣合方式卻有穩固' 1 生不足之疑慮’為了便於拆卸擴充卡，扣合件12僅能約 的扣合於該PCI支架卜尸、要稍微板轉該扣合件、 Γ服器受到震動該扣合们2即可輕易地脫扣於PCI/ 卞進而使長形擴充卡u有滑出溝槽之可能。 然而 邊可 19761 5 200822842 ’能於溝槽ι〇中產生晃動。 再者，溝槽10係一體成形於該PCI支架丨，而使得 PCI支架1之製作難度增加而提高製造成本。 卞 是故，如何有效解決上述習知技術之缺失，實已成 目前亟欲解決之課題。 、 … 【發明内容】 4a於上述習知之缺失，本發明之一目的係在提供一種 ，可％固的將擴充卡之端邊加以固定之擴充卡固持機構。 。本發明之次一目的係在提供一種擴充卡固持機構，具 有彈性緩衝之作用以加強擴充卡設置之穩固性。 本發明之再一目的係在提供一種擴充卡固持機構，傀 郎省成本。 為達上述及其它目的，本發明揭示一種擴充卡固 構，設於電子褒置之機殼上，以固定電性插設於該電子裝 置中之擴充卡之端邊，包括：基座，設於該機殼；擴充卡 固持件，-側樞接於該基座之一側，於背向該機殼之一面 具有供擴充卡插人之溝槽；以及推壓手段，設於該基 =α持件之間’藉以使該擴充卡擴充卡固持件朝向該擴充 方向彈性推壓’進而使該擴充卡固持件之溝槽固持該 充卡之端邊。 ’、 該擴充卡可為長形之擴充卡，其端邊可受該擴充卡固 所具之溝槽之㈣而避免受到重力㈣而彎曲，而 该擴充卡可插設於例如為一橫躺式伺服器之電子裝置 中、亦可插設於直立式之伺服器中。 19761 6 200822842 本發明之擴充卡固定機構應用於橫躺式伺服器時，該 擴充卡多為先插設於—PCI支架中，顧過該pci支架轉 2設於橫躺式伺服器之主機板，而由於主機板相鄰處通 常設置承載有風扇之風扇岐架（Fan ―如），因此 本發明擴充卡固定機構所設之機殼可為風扇固定架。 、本电月之擴充卡固定機構應用於直立式伺服器時，多 為直接插設於主機板上，而擴充卡固定機構係可設於直立 式伺服器中所具之中隔板上。 豸知固疋擴充卡端邊之技術係於PC I支架末端設置 冓才曰再拕配扣合件扣合於該溝槽之開放端上，而使擴 充:之端邊可保持於該溝槽中，由於該扣合件僅能約略地 扣合，且扣合解扣僅互為反向而容易受到外力影響而產生 、彳之見象本杳明之擴充卡固定機構可於該擴充卡固持 件月向該擴充卡之表面上凸設有—支臂，再由該支臂上向 该擴充卡IU持件延伸—末端具有凸緣之彈片以構成該彈 ，推壓部’藉由該凸緣抵接於該推麗片之端部而使該溝槽 礙固該擴充卡端邊’因此，即使將該擴充卡固持件刻意^ =開》亥擴充卡h邊之方向扳動，反而會使得該凸緣更加緊 密抵接於該推壓片末端而不致使該溝槽脫離於該擴充卡 端邊，相反地，必須將該擴充卡固持件往擴充卡端邊方向 稍作扳動方利於將該凸緣撥動離開該推壓片，而藉此設 計，可確保本發明擴充卡固定機構固持該擴充卡端邊之穩 固性。 且，藉由彈性推壓部之彈性，可使該擴充卡固持件更 19761 200822842 加緊密抵接於該擴充卡之端邊，避免習知技術中之擴充卡 端邊時有於溝槽中晃動之現象。 再者，習知技術中之溝槽係與pCI支架一體製成者， ‘因而造成pci支架製作困難而提高製造成本，本發明之擴 充卡固定機構可設於例如為風扇固定架之機殼而可節省 pci支架之製造成本。此外，該基座用以樞接擴充卡固持 件之結構以及所具之推壓片均為易於製成之結構，且該擴 ,充卡固持件可單獨一體開模而製成，因此與習知固定擴充 卡邊之技術整體相比而言較節省成本，即使將本發明之 擴充卡固定機構與習知技術相同地設於pci支架之末 端’本發明亦較節省成本。 因此，本發明之擴充卡固定機構可改善習知缺點，因 此具有高度產業利用價值。 【實施方式】 、以下係藉由特定的具體實施例說明本發明之實施方 '式’熟悉此技藝之人士可由本說明書所揭示之内容輕易地 瞭解本發明之其他優點與功效。 請參閱第2圖及第3圖，本發明之擴充卡固定機構， 設於-電子裝置（圖未示）之機殼2上，以固定電性插設 於该電子裝置中之擴充卡3之端邊3〇，包括：基座別， 設於該機殼2 ;擴充卡固持件2卜一側插接於該基座別 之一側，於背向該機殼2之一面具有供擴充卡3插入之溝 f以及㈣手段，設於該基座20與該擴充卡固持 件21之間，糟以使該擴充卡固持件21朝向該擴充卡3 19761 8 200822842 壓，進而使該擴充卡固持件21之溝槽2ι〇固 持该擴充卡3之端邊30。 該擴充卡3可為長形之擴充卡，其端邊可受該 =件21上所具之溝槽211之嵌固而避免受到重力^ =曲^上述所指之電子裝置可為橫躺式㈣器或直丄 二服該機殼2則可為橫躺式伺服器中 =定，—、或直立式飼服器中之中二風 =一 PCI支架，而令本發明之擴充卡固定機構設 支架之末端。 ^手段包括有設於該基座2卜側，且端部朝向 =充一卡固持件21之推壓片201、及設於該擴充卡固持 2 上’與該推壓片201之端部㈣向，以承受該 堊片201之推壓力之彈性受壓部212。 :推壓片201係平行於該擴充卡固持件21自該基座200822842 IX. INSTRUCTIONS · TECHNICAL FIELD OF THE INVENTION The present invention relates to an expansion card holding mechanism, and more particularly to a holding mechanism for fixing an end side of an expansion card electrically inserted in an electronic device. [Prior Art] Referring to FIG. 1 , the PCI bracket 1 can be inserted into a plurality of expansion cards to be inserted into the server (not shown), and the expansion card can include an expansion card of a normal length. Or a long-length expansion card u, the long expansion card 11 has a long length, so the end will be bent by gravity and bent, which may cause damage in a long time, so if a long expansion card is inserted in the server, In contrast, the pCI holder must be made to be of an elongated type, and a groove 10 having an end edge corresponding to the mating elongated expansion card u must be provided at the end of the PCI holder 1 in order to prevent the elongated expansion card u from slipping out. Groove, available on the pci bracket! The end of the elongate expansion card 11 is fixed to the groove 1 by the end of the PCI card 1 corresponding to the open end of the PCI holder 1 In the middle. The fastening member 12 is fastened to the open end of the PCI bracket 1 corresponding to the groove 1G by a structure such as a tongue. However, the fastening method has a stable '1 lack of doubt'. The card and the fastening member 12 can only be buckled to the PCI bracket, and the buckle is slightly turned, and the servo is shocked. The buckle 2 can be easily tripped to the PCI/卞. The elongated expansion card u has the possibility of sliding out of the groove. However, the side can be shaken in the groove 〇 19761 5 200822842 ’. Moreover, the groove 10 is integrally formed on the PCI bracket, and the manufacturing difficulty of the PCI bracket 1 is increased to increase the manufacturing cost.卞 Therefore, how to effectively solve the above-mentioned lack of conventional technology has become a problem that is currently being solved. [Invention] 4a In the above-mentioned conventional deficiencies, it is an object of the present invention to provide an expansion card holding mechanism that can securely fix the end edge of an expansion card. . A second object of the present invention is to provide an expansion card retaining mechanism that has an elastic cushioning function to enhance the stability of the expansion card setting. Still another object of the present invention is to provide an expansion card retention mechanism that saves money. To achieve the above and other objects, the present invention discloses an expansion card that is disposed on a casing of an electronic device and is fixedly inserted into an end of an expansion card of the electronic device, including: a base. In the casing; the expansion card holder, the side is pivotally connected to one side of the base, and has a groove for inserting the expansion card on a side facing away from the casing; and a pushing means is provided at the base = Between the holders, 'the expansion card expansion card holder is elastically urged toward the expansion direction', so that the groove of the expansion card holder holds the end of the card. ', the expansion card can be an elongated expansion card, the end edge of which can be bent by the expansion of the expansion (4) to avoid being bent by gravity (four), and the expansion card can be inserted, for example, for a horizontal lying The electronic device of the server can also be inserted into an upright server. 19761 6 200822842 When the expansion card fixing mechanism of the present invention is applied to a horizontally lying server, the expansion card is mostly inserted in the PCI bracket, and the pci bracket 2 is disposed on the motherboard of the horizontal server. Because the fan truss (Fan-like) carrying the fan is usually disposed adjacent to the motherboard, the casing provided by the expansion card fixing mechanism of the present invention may be a fan holder. When the expansion card fixing mechanism of this power month is applied to the vertical server, it is usually directly inserted into the motherboard, and the expansion card fixing mechanism can be disposed on the upper plate of the vertical server. The technology of the end of the expansion card is set at the end of the PC I bracket, and then the fastening component is fastened to the open end of the groove, so that the end of the expansion can be maintained in the groove. The expansion card fixing mechanism of the present invention can be used for the expansion card holder because the fastening member can only be approximately buckled and the buckle is only reversed and is easily affected by external force. The arm is convexly disposed on the surface of the expansion card, and the arm extends from the arm to the expansion card IU holder. The end has a flanged elastic piece to form the elastic body, and the pressing portion 'by the flange Abutting against the end of the slab, the groove blocks the end of the expansion card. Therefore, even if the expansion card holder is deliberately opened, the direction of the edge of the expansion card is reversed. The flange is more closely abutted against the end of the pressing piece without causing the groove to be detached from the end of the expansion card. Conversely, the expansion card holder must be slightly moved toward the end of the expansion card to facilitate the The flange is moved away from the pressing piece, and the design ensures the expansion card fixing machine of the invention Stability of the curable holding end edges of the expansion card. Moreover, by the elasticity of the elastic pressing portion, the expansion card holder can be further tightly abutted on the end of the expansion card, thereby avoiding shaking in the groove when the card edge of the expansion card is known in the prior art. The phenomenon. Furthermore, the groove system of the prior art is integrally formed with the pCI bracket, which results in difficulty in manufacturing the pci bracket and increases the manufacturing cost. The expansion card fixing mechanism of the present invention can be provided, for example, in the casing of the fan holder. It can save the manufacturing cost of the pci bracket. In addition, the structure of the base for pivoting the expansion card holder and the pressing piece are all easy to manufacture, and the expansion and the card holder can be separately opened and molded, so It is known that the technology of the fixed expansion card edge is relatively cost-effective, and even if the expansion card fixing mechanism of the present invention is provided at the end of the pci bracket as in the prior art, the present invention is more cost effective. Therefore, the expansion card fixing mechanism of the present invention can improve the conventional disadvantages, and thus has a high industrial utilization value. [Embodiment] The following is a description of the embodiments of the present invention by way of specific embodiments. Those skilled in the art can readily appreciate the other advantages and advantages of the present invention. Referring to FIG. 2 and FIG. 3, the expansion card fixing mechanism of the present invention is disposed on the casing 2 of the electronic device (not shown), and is fixedly inserted into the expansion card 3 of the electronic device. The side edge 3〇 includes: a base, which is disposed on the casing 2; the side of the expansion card holder 2 is inserted on one side of the base, and has an expansion card on one side facing away from the casing 2 The insertion slot f and the (4) means are disposed between the base 20 and the expansion card holder 21, so that the expansion card holder 21 is pressed toward the expansion card 3 19761 8 200822842, thereby holding the expansion card The groove 2 of the piece 21 holds the end edge 30 of the expansion card 3. The expansion card 3 can be an elongated expansion card, and the end edge of the expansion card 3 can be embedded by the groove 211 on the member 21 to avoid gravity. The electronic device can be horizontally placed. (4) The device or the 2nd device may be a horizontally lying server, or a vertical support device, wherein the second air = a PCI bracket, and the expansion card fixing mechanism of the present invention Set the end of the bracket. The method includes a pressing piece 201 disposed on the side of the base 2 and having an end portion facing the one holding card holder 21, and a fixing piece 2 disposed on the expansion card holding 2 and the end portion of the pressing piece 201 (4) The elastic pressure receiving portion 212 is received to withstand the pressing force of the cymbal 201. : the push piece 201 is parallel to the expansion card holder 21 from the base
▲⑽並、、二垂直轉折後垂直朝向該彈性受壓部212延 孩彈性扣止部212可由凸設於該 =卡3之表面的-支臂一及由該= 向該擴充卡固持件21延伸且末端具有凸緣之彈片· 所構成’藉由該彈片212b所具之凸緣抵接於該推壓片201 之端部而促使該溝槽211固定該擴充卡3之端邊30。 山該擴充卡固持件21並可於該擴充卡固持㈣一側之 各L伸出相對且分別具有凸軸之樞接片體213，而該 二坐20亦δ又有相對且分別具軸孔之樞接片體別2，以使 μ擴充卡固持件21樞接於該基座2()，而為了確定該擴充 19761 9 200822842 卡固持件21與該擴充卡3之端邊3〇間之平行度俾使該溝 槽211以正確的角度固定該擴充卡3之端邊3〇，復可於 該基座20所具之樞接片體202上設有止擋凸部2〇2]，以 止擋於該擴充卡固持件2〗之樞接片體213之一側使該擴 充卡，持件21之轉動極限為平行於該擴充卡^端邊％ 的狀態。當然’該樞接片體213與該樞接片體2〇2所分別 具有的樞接結構亦可對調設置’或兩者所具之減結構均 為轴孔再以轉軸貫穿，然而樞接之方式甚多且均為習知技 術’因此不再為文加以贅述。 另外，該擴充卡固持件21於遠離樞接於該基座2〇 之-端設有朝向該擴充卡3之端邊3〇之包覆凸部214， =該擴充卡固持件21之溝槽211亦延伸至該包覆凸部 X匕设該擴充卡3之端邊30，俾增進該溝槽211固 疋该擴充卡3之端邊30的穩固性。 請配合參閱第4圖及第5圖，欲利 固定機構固定該擴充卡3之端邊3η π生把充卡 持件21位於不妨礙該擴充卡可敍該擴充卡固 之角度，接著直接將該擴充卡固持件21往該擴 = =30方向轉動至該彈性推壓部212 _ 之推壓’即可使該擴充卡固持： 該擴充卡3之端邊30。 K㈣211固持 而欲使該擴充卡3脫籬太八Da , 雕本發明之擴充卡固定機構以 進仃卸除或增設其他的擴充卡 苒乂 固持件21往該擴充卡3之端 忙兄卞 鳊邊30方向壓動，以使該彈性 19761 10 200822842 推壓部212所具彈片212b之凸緣略為鬆脫於該推麼片 2〇1，接著扳動該彈性推壓部212之彈片仙使該凸緣脫 離該推壓片20卜即可樞轉該擴充卡固持件⑴吏該擴充 卡固持件21之溝槽211脫離該擴充卡3之端邊3〇。 習知固定擴充卡端邊之技術係於pci 溝槽’再搭配-扣合件扣合於該溝槽之開放端上而:擴充 卡之端邊保持於該溝槽中’由於該扣合件僅能約略地扣 合，且扣合解扣僅互為反向而容易因受外力而產生脫扣之 現象，本發明之擴充卡固定機構因具有彈性推壓部212 以及搭配之推壓片201，即使將該擴充卡固持件21刻意 往離開該擴充卡3之端邊3〇之方向扳動，反而會使得彈 性扣止部212所具彈片212b之凸緣更加緊純接於該推 壓片201末端而不致使該溝槽211脫離於該擴充卡3之端 邊30，相反地，必須將該擴充卡固持件21往擴充卡3之 端邊30方向稍作壓動方利於將該凸緣撥動離開該推壓片 201，而藉由此種結構之設計，可確保本發明之擴充卡固 定機構固持該擴充卡3之端邊30之穩固性。 且，藉由彈性推壓部212之彈性，可使該擴充卡固持 件21更加緊密抵接於該擴充卡3之端邊3〇，避免習知技 術中之擴充卡端邊時有於溝槽中晃動之現象。 再者，習知技術中之溝槽係與PCI支架一體製成者， 因而造成PCI支架製作困難而提高製造成本，本發明之擴 充卡固定機構可設於例如為風扇固定架之機殼而可節省" pci支架之製造成本，而該基座2〇用以樞接擴充卡固持 19761 11 200822842 件之結構以及所具之推壓片均為易於製成之結構，且該擴 充卡固持件可單獨一體開模而製成，因此與習知固定擴充 卡端邊之技術整體相比而言較節省成本，即使將本發明之 擴充卡固定機構與習知技術相同地設於pc I支架之末 端，本發明亦較習知技術節省成本。 另外，本發明之擴充卡固定機構可應用於多種可插設 擴充卡之電子裝置’該電子裝置可為一橫躺式伺服器或直 立式之伺服器。當本發明之擴充卡固定機構應用於橫躺式 伺服器時，該擴充卡多為先插設於一 PCI支架中，再透過 該PCI支架轉接插設於橫躺式伺服器之主機板，而由於主 機板相鄰處通常設置承載有風扇之風扇固定架（Fan breaket)，因此本發明擴充卡固定機構所設之機殼可為 風扇固定架，而當本發明之擴充卡固定機構應用於直立式 祠服器時，該擴充卡多為直接插設於主機板上，*擴充卡 固定機構可設於直立式飼服器中所具之中隔板上。 ^上述實施例僅為例示性說明本發明之原理及其功 效’而土非用於限制本發明。任何熟習此項技藝之人士均可 =背=明::神及範脅下，對上述實施例進行修飾 一 么明之權利保護範圍，應如後述之申言主 專利範圍所列。 明 【圖式簡單說明】 第1圖係顯示習知形成於PCI支架上 端奴擴充卡固持機構示意圖； U卡 第2圖至第3圖係為本發明之擴充卡固持機構之具體 19761 12 200822842 實施例示意圖；以及 第4至5圖係為本發明之擴充卡固持機構之作動示意 圖。 【主要元件符號說明】 1 PCI支架 10 溝槽 11 長形擴充卡 12 扣合件 2 機殼 20 基座 201 推壓片 202 樞接片體 2021 止擋凸部 21 擴充卡固持件 211 溝槽 212 彈性推壓部 212a 支臂 212b 彈片 213 樞接片體 3 擴充卡 30 端邊 13 19761▲ (10) and then, after two vertical turning, vertically extending toward the elastic pressure receiving portion 212, the elastic fastening portion 212 may be protruded from the surface of the card 3 by the arm 1 and the = to the expansion card holder 21 The elastic piece extending and having a flange at the end is formed by the flange of the elastic piece 212b abutting against the end of the pressing piece 201 to urge the groove 211 to fix the end edge 30 of the expansion card 3. The expansion card holder 21 can extend on the side of the expansion card (4), and each has a pivoting plate body 213 having a convex axis, and the two seats 20 are also opposite and respectively have a pivot hole. The patch body 2 is configured to pivot the μ expansion card holder 21 to the base 2 (), and to determine the parallelism between the extension 19761 9 200822842 card holder 21 and the end edge 3 of the expansion card 3 The groove 211 is fixed to the end edge 3 of the expansion card 3 at a correct angle, and the pivoting piece 202 of the base 20 is provided with a stop protrusion 2〇2]. One side of the pivoting piece 213 of the expansion card holder 2 is such that the expansion card has a rotation limit parallel to the end of the expansion card. Of course, the pivoting structure of the pivoting piece body 213 and the pivoting piece body 2〇2 can also be adjusted to the same or both of the reducing structures are shaft holes and then penetrated by the rotating shaft, but the pivoting There are many ways and they are all known techniques' so they are not repeated here. In addition, the expansion card holder 21 is provided with a covering protrusion 214 facing the end edge of the expansion card 3 at a position remote from the end of the base 2, and the groove of the expansion card holder 21 The 211 also extends to the cover protrusion X and the end edge 30 of the expansion card 3 to enhance the stability of the groove 211 to fix the end edge 30 of the expansion card 3. Please refer to FIG. 4 and FIG. 5 together, and the fixing mechanism fixes the end edge of the expansion card 3, and the charging card holder 21 is located at an angle that does not prevent the expansion card from being extended, and then directly The expansion card holder 21 is rotated in the direction of the expansion ==30 to the pressing of the elastic pressing portion 212_ to hold the expansion card: the end edge 30 of the expansion card 3. K(4)211 holds and wants to make the expansion card 3 out of the fence. The expansion card fixing mechanism of the present invention is used to remove or add another expansion card holder 21 to the end of the expansion card 3. Pressing in the direction of the edge 30, so that the flange of the elastic piece 212b of the elastic portion 19761 10 200822842 pressing portion 212 is slightly loosened from the pushing piece 2〇1, and then the elastic piece of the elastic pressing portion 212 is pulled to make the The flange is detached from the pressing piece 20 to pivot the expansion card holder (1), and the groove 211 of the expansion card holder 21 is separated from the end edge 3 of the expansion card 3. The technique of fixing the end of the fixed expansion card is that the pci groove 're-matching-fastening member is fastened to the open end of the groove: the end edge of the expansion card is held in the groove' due to the fastening piece The expansion card fixing mechanism of the present invention has the elastic pressing portion 212 and the matching pressing piece 201 because the buckle can be buckled only in the opposite direction and is easily reversed due to external force. Even if the expansion card holder 21 is intentionally pulled away from the end 3 of the expansion card 3, the flange of the elastic piece 212b of the elastic fastening portion 212 is more closely connected to the pressing piece. The end of 201 does not cause the groove 211 to be detached from the end edge 30 of the expansion card 3. Conversely, the expansion card holder 21 must be slightly pressed toward the end edge 30 of the expansion card 3 to facilitate the flange. By pushing the push piece 201, the design of the structure ensures that the expansion card fixing mechanism of the present invention holds the end edge 30 of the expansion card 3 with stability. Moreover, the expansion card holder 21 can be more closely abutted against the end edge 3 of the expansion card 3 by the elasticity of the elastic pressing portion 212, so as to avoid the groove in the prior art. The phenomenon of shaking in the middle. Furthermore, the groove in the prior art is integrally formed with the PCI bracket, thereby making the PCI bracket difficult to manufacture and increasing the manufacturing cost. The expansion card fixing mechanism of the present invention can be provided, for example, as a casing of the fan holder. Saving the manufacturing cost of the pci bracket, and the base 2 is used for pivoting the expansion card to hold the structure of the 19761 11 200822842 piece and the push piece is an easy-to-manufacture structure, and the expansion card holder can be It is made by integrally opening the mold, so it is more cost-effective than the technology of the conventional fixed expansion card end, even if the expansion card fixing mechanism of the present invention is provided at the end of the pc I bracket as well as the prior art. The present invention also saves costs compared to conventional techniques. In addition, the expansion card fixing mechanism of the present invention can be applied to a plurality of electronic devices that can be inserted into the expansion card. The electronic device can be a horizontal server or an upright server. When the expansion card fixing mechanism of the present invention is applied to a horizontally lying server, the expansion card is first inserted into a PCI bracket, and then inserted into the motherboard of the horizontal server through the PCI bracket. The fan case provided by the expansion card fixing mechanism of the present invention may be a fan holder, and the expansion card fixing mechanism of the present invention is applied to the fan board. In the case of an upright server, the expansion card is mostly directly inserted into the motherboard, and the expansion card fixing mechanism can be disposed in the upper partition of the vertical feeder. The above-described embodiments are merely illustrative of the principles of the invention and its utility, and are not intended to limit the invention. Anyone who is familiar with this skill can = back = Ming:: God and Fan threat, modify the above embodiments. The scope of protection of rights should be listed in the scope of the main patents mentioned later. BRIEF DESCRIPTION OF THE DRAWINGS [Fig. 1] shows a schematic diagram of a conventional slave card expansion mechanism formed on a PCI stand; Figure 2 to Figure 3 of the U card are specific to the expansion card retention mechanism of the present invention. 19761 12 200822842 FIG. 4 is a schematic view showing the operation of the expansion card holding mechanism of the present invention. [Main component symbol description] 1 PCI bracket 10 Groove 11 Long expansion card 12 Fastener 2 Case 20 Base 201 Pushing piece 202 Pivot piece 2021 Stop protrusion 21 Expansion card holder 211 Groove 212 Elastic pushing portion 212a arm 212b elastic piece 213 pivoting piece body 3 expansion card 30 end edge 13 19761