200528013 (1) * 九、發明說明 ‘ 【發明所屬之技術領域】 本發明是有關一種散熱座及連接裝置的總成，以安裝 於印刷電路板上的電子封裝，其中該連接裝置具有一扣件 及一彈簧，當扣件繫接至印刷電路板時，該彈簧將散熱座 、 抵靠電子裝置裝載。 憲 【先前技術】 · 美國第5,3 8 4,94 0號專利案揭示此種散熱座總成，其 中該散熱座包含一具有散熱片及貫穿孔的頂表面，該貫穿 孔可接納「推銷」扣件的桿，該扣件具有設有一頭部的第 一末端，及設有叉，以嚙合印刷電路板（P C B )內的一孔 的第二末端。在位於印刷電路板表面及扣件頭部所形成的 肩部之間的桿周圍設有一線圈彈簧。當第二末端嚙合PCB 時，該彈簧即被壓縮’進而將散熱座抵靠安裝於PCB上 的電子裝置裝載。 鲁 圖1顯示習知技藝的散熱座總成，具有散熱座]〇及 連接裝置2，安裝至PCB 6上的電子裝置4。散熱座1〇具 有底板1 1，底板Π包含設有散熱片1 3的頂表面丨2、底 表面1 8、及由一錐口孔所圍繞的孔1 5。連接裝置2具有 、 一扣件2 0 ’包含設有一頭部2 2的第一末端2 1，承納於 PCB內一孔7的第二末端24、在該等末端21、24之間延 伸的桿2 8、及一環繞位在該錐口孔內的桿的線圈彈簧40 。扣件藉嚙合在底板下方的桿的C形夾5 0來固持至散熱 -4 - 200528013 (2) 座。末端24可攻以螺紋，以便固持在電路板內的帶螺紋 嵌件內。 儘管在頂表面使用錐口孔，扣件及彈簧仍然延伸超過 該表面一相當高度。雖然此對具有相同高度的冷卻翼片不 構成問題，但是當散熱座的高度，由於較高構件及垂直電 路板空間較窄時，而需保持矮短（0.3”以下）時，則對典 型的推銷而言，空間稍有不足。在安裝壓縮彈簧後所剩的 高度，及底板上方的推銷的頭部，不足以允許以所需彈力 所做的撓曲量。因此，有必要提供一種散熱座總成，其包 含一具有足夠撓曲長度的連接裝置，以容納構件尺寸的差 異，同時提供所需的彈力，以得優良的熱接觸。 【發明內容】 依據本發明，彈簧具有第一部分，抵靠一相對電路板 固定的抵接表面而被收納，且具有第二部分，抵靠形成於 扣件上的肩部而被收納，其中該第一及第二部分的其中之 一部分係設於散熱座底板的底表面下方。 依據較佳具體實施例，杯形構件或嵌環具有一固定於 底板一孔內的底部，使得該底部在底板的底表面提供一抵 接表面。該彈簧是一壓縮彈簧，具有第一末端，抵靠該底 部，且具有第二部分，抵靠由該扣件頭部所形成的肩部。 因此，該彈簧延伸通過散熱座底座厚度，且延伸於散熱座 底表面下方，使得非常少的扣件延伸於底板的頂表面上方 200528013 (3) 藉將大部分的安裝硬體設於底板頂表面下方’可使防 礙流至冷卻翼片的氣流的因素減至最少。藉允許較高的硬 體，可設置較高的彈簧，而得以較低的彈性率提供相同的 力量，使得可容納較大的堆疊容限。同樣的，較大的力可 藉使用具有相同彈性率的較長彈簧來施加。 依據一較佳具體實施例，杯形構件的唇係由一抵靠底 板頂表面而被承納的凸緣所圍繞。底板的頂表面可以是環 繞該孔的埋頭孔，使得凸緣與底板的頂表面齊平或在頂表 面下方。杯形構件最好是由金屬片拉製，但也可由其他材 料鑄造或模製。 依據另一具體實施例，該唇未設置凸緣，而藉底板以 壓擠嵌合或其他方式固定在孔內。較佳者，在底表面設置 埋頭孔，當杯形構件被向上擠壓時，可限制杯形構件的行 程，及爲彈簧提供一均勻直徑的口徑。此外，杯形構件也 可設有一鄰接底板的底表面的環形肩部，以限制其行程。 在任一情形下，壓縮彈簧抵靠在杯形構件底部環繞一孔的 抵接表面。 在一修飾例中，該孔除了在與其同軸向設置的小孔之 外，在頂表面處是封閉的。此提供一可包容扣件頭部的口 袋，使得其不致延伸超過底板的頂表面。在此實例中，彈 簧的長度受到限制，但散熱片可在孔上方維持完整無缺， 藉將孔設於兩散熱片之間，可提供進入扣件頭部的管道。 當扣件是推銷時，不需推壓扣件的頭部，以壓縮彈簧，直 至叉嚙合PCB爲至。當扣件在第二末端具有螺紋時，轉 200528013 (4) 動工具如六角形鍵可插入孔內。 在另一實例中，省略了杯形構件，而使用一錐形張力 彈簧。在大端的繞圈抵靠一抵接表面，此抵接表面環繞位 在底板頂表面上的孔；而在扣件上的一肩部嚙合位在底板 底表面下方的繞圈。當扣件的第二末端嚙合印刷電路板時 ，散熱座藉彈簧的張力抵靠電子構件裝載。此實例的優點 是提供較少的構件及低成本。 本發明之其他目的及特色將在參考下文及各附圖後有 進一步的認知。惟應了解，該等圖式旨在敘述，而非對本 發明之範疇加以限制。該等圖式也非按比例顯示，其等旨 在敘述結構及程序的槪念。 【實施方式】 圖2A及2B顯示用以將散熱座10繫接至安裝在印刷 電路板6上的電子裝置4的連接裝置2的第一具體實施例 ，散熱座1 〇具有一設有散熱片1 3的頂表面，散熱片1 3 在安裝孔1 5周遭中斷。相對的底表面1 8承納於電子裝置 4上。散熱座最好是由鋁、銅、石墨、或熱傳導塑膠製成 ，且可擠製、加工、鑄造、或模製。 連接裝置2具有機械扣件20、杯形構件3〇、及彈簧 4〇。機械扣件20具有第一末端21、第二末端24、及在該 等末端之間延伸的桿2 8。第一末端2 1設有一頭部22，形 成面對第二末端24的肩部23。第二末端24包含具有可 嚙合印刷電路板6的倒鉤2 6的彈性安裝叉2 5。扣件可由 200528013 (5) 鋼、黃銅、或鋁製成，但如需絕緣的話，也可由塑 。扣件可藉冷鍛、加工、鑄造、或注射成型來製造 杯形構件3 0具有由凸緣3 3環繞的唇3 2，底 及在唇及底部之間延伸的圓筒形壁3 7。底部3 4形 繞中間孔3 6的抵接表面3 5，該中間孔3 6接納桿 圓筒形壁3 7承納於底板1 0的孔1 5內時，凸緣3 3 板1 〇的頂表面1 2。需要將位在底板1 1頂表面1 2 連接器的高度減至最小時，可環繞孔1 5設置一埋 使得凸緣3 3與頂表面齊平。如果需要電絕緣或特 腐蝕特性，杯形構件3 0可由金屬片沖壓、拉延、 製、冷鍛、加工、鑄造、或注射成型來製造。 彈簧4〇是線圈彈簧，具有第一末端42，抵靠 件3 0底部3 4的抵接表面3 5而被收納，且具有第 43 ’抵靠由扣件20的頭部22所形成的肩部23而 。扣件2 0構製成使得，當叉2 5嚙合印刷電路板6 7時’彈簧4 0被壓縮而將散熱座1 〇裝載在印刷電 上。扣件最好是有各種尺寸，以便在維持適當的彈 情形下’可容納各種高度的散熱座。本發明的優點 2B 顯看出，其中扣件的第一末端並未延伸超過 1 3的頂部。因此，在未增加散熱座總成整體高度 下’可獲得所需的彈簧力，進而改良印刷電路板（ 的堆疊容限。彈簧一般上是由具有所需彈簧特性的 成’除非另規定需要電絕緣及/或特定的抗腐蝕特 該情形下’可使用彈性體材料。該彈簧可由金屬線 I膠製成 〇 部34、 .成一環 28。當 抵靠底 上方的 頭孔， 定的抗 金屬紡 杯形構 —末_ 被收納 內的孔 :路板6 簧力的 可由圖 散熱片 的情形 PCB ) 金屬製 性，在 、沖壓 -8- 200528013 (6) 或模製來形成。 扣件2 0、杯形構件3 0及彈簧4 0的預先組成，可簡 易的藉將扣件2 0擠壓通過杯形構件3 〇底部內的孔，進而 壓縮彈簧4 0直至倒鉤2 6嚙合杯形構件3 〇的底部爲止而 達成。之後，杯形構件3 0可座落在底板U的孔內，底板 1 1可組裝至位在PCB 6上的裝置4，且扣件的第一末端 21被壓下，直至第二末端24貫穿PCB 6內的孔7爲止。 此安裝可藉機械方式達成，例如藉放射狀的彈性叉2 5安 裝，或藉焊接，在此情形時，則不需設置叉。彈簧4 0將 散熱座1 〇抵靠電子裝置4裝載，以作有效的傳熱及散熱 〇 圖3 A及3 B顯示連接裝置2的第二具體實施例，其 中杯形構件3 0未在唇3 2周圍設置凸緣。代之者，散熱座 底板1 1的底表面1 8沿孔1 5設置埋頭孔1 9 ,而唇3 3嵌 入埋頭孔1 9。此外選擇性的，杯形構件3 0的圓筒形壁3 7 可設有一肩部以限制在底板1 1的孔1 5內的行進。杯形構 件3 0可藉壓擠嵌合、螺紋、焊接、硬焊、黏合等方式連 接至底板的底表面。扣件20及彈簧40的特色大致與圖 2 A及2 B的實施例相同。以C夾構形的固持件5 0被提供 以將扣件20、杯形構件3 0及彈簧40固持在一起成一單 元，可在組裝至PCB 6之前，預先安裝至散熱座10上。 圖4A及4B顯示連接裝置的第三具體實施例，大致 與第二具體實施例相同，但經修飾以便配合另一種印刷電 路板6的使用，該印刷電路板6具有一孔1 5，在頂表面 -9- 200528013 (7) 12處封閉。此處，桿28及彈簧40比用於圖2A及2B散 熱座1 0的連接裝置的稍短。扣件的第一末端2 1係設於頂 表面下方的口袋內，且僅可經由設於孔1 5中央的進入孔 1 6才能接觸到。其優點在於散熱片1 3不致於在連接器上 方被干涉，而可藉由一承納於散熱片1 3之間的工具來進 · 入。然而，散熱片可設有至少一凹口 14，以對該工具提 · 供足夠的空隙，該凹口 1 4可以是六角形鍵。 圖5顯示使用錐形張力彈簧4 5的連接裝置的第四具 體實施例，張力彈簧45的第一末端47是由在大端的繞圈 構形，而第二末端4 8是由遠離該大端的繞圈所構形。第 一末端4 7抵靠位在底板1 1頂表面上的抵接表面1 7，抵 接表面1 7環繞孔1 5 ;而第二末端4 8抵靠形成於遠離該 頭部22的桿28上的第二肩部29。當扣件20被向下推使 得第二末端48嚙合PCB 6內的孔7時，彈簧45被拉緊， 故而將散熱座1 0裝載至電子裝置4上。此實施例的優點 是提供相對於底板1 1頂表面1 2較低的輪廓，且由於省略 馨 了杯形構件及固持器，故減少了連接器的構件數量。 雖然本發明係以範例性實施例來敘述，惟應了解，本 藝之人士可對上述實施例進行修飾、增加或刪減，但此等 k 作爲仍應視爲在本發明之精神及範疇內。本發明之範疇不 - 受所揭示的實施例的限制。 [圖式簡單說明】 本發明之特色將藉下文圖式所示較佳具體實施例來加 -10- 200528013 (8) 以說明，其中： 圖1顯不習知技藝’安裝有連接裝置的散熱座的正視 圖。 圖2A係依據本發明第〜較佳具體實施例之散熱座及 連接裝置的分解立體圖。 . 圖2 B係安裝有圖2 A裝置的散熱座的正視圖。 · 圖3 A係依據本發明第二較佳具體實施例之散熱座及 連接裝置的分解立體圖。 · 圖3 B係安裝有圖3 a裝置的散熱座的正視圖。 圖4A係依據本發明第三較佳具體實施例之散熱座及 連接裝置的立體圖。 圖4B係安裝有圖4A裝置的散熱座的正視圖。 圖5係安裝有本發明第四較佳具體實施例之連接裝置 的散熱座的正視圖。 【主要元件符號說明】 φ 2 連接裝置 4 電子裝置 6 印刷電路板 * 7 孔 - 1 〇 散熱座 1 1 底板 1 2 頂表面 1 3 散熱片 -11 - 200528013 (9) 14 凹口 15 安裝孔 17 抵接表面 1 8 底表面 20 扣件 2 1 第一末端 22 頭部200528013 (1) * IX. Description of the invention [Technical field to which the invention belongs] The present invention relates to an assembly of a heat sink and a connection device for mounting an electronic package on a printed circuit board, wherein the connection device has a fastener And a spring, when the fastener is connected to the printed circuit board, the spring loads the heat sink against the electronic device. [Prior art] · US Patent No. 5,3,84,94 0 discloses such a heat sink assembly, wherein the heat sink includes a top surface with a heat sink and a through hole, and the through hole can receive a "sales promotion" The lever of the fastener has a first end provided with a head and a second end provided with a fork to engage a hole in a printed circuit board (PCB). A coil spring is provided around the rod between the surface of the printed circuit board and the shoulder formed by the head of the fastener. When the second end engages the PCB, the spring is compressed 'and the heat sink is loaded against the electronic device mounted on the PCB. FIG. 1 shows a conventional heat sink assembly with a heat sink] and a connection device 2 mounted on an electronic device 4 on a PCB 6. The heat sink 10 has a bottom plate 11 which includes a top surface 2 with a heat sink 13, a bottom surface 18, and a hole 15 surrounded by a tapered hole. The connecting device 2 has a fastener 2 0 ′ including a first end 21 provided with a head 22 and a second end 24 received in a hole 7 in the PCB and extending between the ends 21 and 24. The rod 28 and a coil spring 40 surrounding the rod located in the conical aperture. The fastener is held to the heat sink -4-200528013 (2) by the C-clip 50 which is engaged with the rod below the bottom plate. The tip 24 can be tapped for retention in a threaded insert in a circuit board. Despite the use of tapered holes in the top surface, the fasteners and springs still extend a considerable height beyond this surface. Although this does not pose a problem for cooling fins of the same height, when the height of the heat sink is relatively short (below 0.3 ") due to the higher components and the narrow space of the vertical circuit board, it is typical for the In terms of sales, the space is slightly insufficient. The height remaining after the compression spring is installed and the head of the sales above the base plate are not enough to allow the amount of deflection made with the required spring force. Therefore, it is necessary to provide a heat sink. The assembly includes a connecting device with a sufficient deflection length to accommodate the difference in the dimensions of the components, while providing the required elastic force to obtain excellent thermal contact. [Summary of the Invention] According to the present invention, a spring has a first part, It is stored against a contact surface fixed to the circuit board, and has a second portion, which is stored against a shoulder formed on the fastener, wherein one of the first and second portions is provided for heat dissipation. Below the bottom surface of the seat bottom plate. According to a preferred embodiment, the cup-shaped member or bezel has a bottom fixed in a hole in the bottom plate, so that the bottom is on the bottom surface of the bottom plate Provides an abutment surface. The spring is a compression spring having a first end against the bottom and a second portion against a shoulder formed by the head of the fastener. Therefore, the spring extends through heat dissipation The base is thick and extends below the bottom surface of the heat sink, so that very few fasteners extend above the top surface of the bottom plate. 200528013 (3) By installing most of the mounting hardware below the top surface of the bottom plate, the flow can be blocked. The airflow factor to the cooling fins is minimized. By allowing higher hardware, higher springs can be provided while providing the same force with lower elasticity, allowing for larger stacking tolerances. Also The larger force can be applied by using a longer spring with the same elasticity. According to a preferred embodiment, the lip of the cup-shaped member is surrounded by a receiving flange against the top surface of the bottom plate. The top surface of the bottom plate can be a countersink hole surrounding the hole, so that the flange is flush with or below the top surface of the bottom plate. The cup-shaped member is preferably drawn from a metal sheet, but it can also be cast or molded from other materials. According to another specific embodiment, the lip is not provided with a flange, and is fixed in the hole by squeezing or fitting through the bottom plate. Preferably, a countersunk hole is provided on the bottom surface when the cup-shaped member is pressed upward In this case, it is possible to limit the travel of the cup-shaped member and provide a uniform diameter for the spring. In addition, the cup-shaped member may also be provided with an annular shoulder adjacent to the bottom surface of the bottom plate to limit its travel. In either case, compression The spring abuts against the abutment surface of a cup-shaped member surrounding a hole. In a modification, the hole is closed at the top surface except for a small hole disposed coaxially therewith. This provides an inclusive buckle Pocket on the head so that it does not extend beyond the top surface of the base plate. In this example, the length of the spring is limited, but the heat sink can remain intact above the hole. By placing the hole between the two heat sinks, Provides access to the head of the fastener. When the fastener is sold, there is no need to push the head of the fastener to compress the spring until the fork engages the PCB. When the fastener has a thread at the second end, a turning tool such as a hexagon key can be inserted into the hole. In another example, the cup-shaped member is omitted and a conical tension spring is used. The loop at the large end abuts against an abutment surface that surrounds a hole located on the top surface of the base plate; and a shoulder on the fastener engages the loop located below the bottom surface of the base plate. When the second end of the fastener engages the printed circuit board, the heat sink is loaded against the electronic component by the tension of the spring. The advantage of this example is that it provides fewer components and is low cost. Other objects and features of the present invention will be further recognized after referring to the following and the accompanying drawings. It should be understood, however, that the drawings are intended to be a description, not a limitation on the scope of the invention. These drawings are not shown to scale, and their purpose is to describe the structure and procedures. [Embodiment] FIGS. 2A and 2B show a first specific embodiment of a connecting device 2 for connecting a heat sink 10 to an electronic device 4 mounted on a printed circuit board 6. The heat sink 10 has a heat sink. The top surface of the heat sink 1 3 is interrupted around the mounting hole 15. The opposite bottom surface 18 is received on the electronic device 4. The heat sink is preferably made of aluminum, copper, graphite, or thermally conductive plastic, and can be extruded, processed, cast, or molded. The connection device 2 includes a mechanical fastener 20, a cup-shaped member 30, and a spring 40. The mechanical fastener 20 has a first end 21, a second end 24, and a rod 28 extending between the ends. The first end 21 is provided with a head 22 forming a shoulder 23 facing the second end 24. The second end 24 includes a resilient mounting fork 25 having a barb 26 that can engage the printed circuit board 6. The fasteners can be made of 200528013 (5) steel, brass, or aluminum, but they can also be made of plastic if insulation is required. The fastener can be manufactured by cold forging, machining, casting, or injection molding. The cup member 30 has a lip 3 2 surrounded by a flange 3 3, a bottom, and a cylindrical wall 37 extending between the lip and the bottom. The bottom 3 4 is abutting the surface 3 5 around the middle hole 36. The middle hole 3 6 receives the rod cylindrical wall 37 and is received in the hole 15 of the bottom plate 10. Top surface 1 2. When the height of the connector on the bottom plate 1 1 and the top surface 1 2 needs to be minimized, a recess may be set around the hole 15 so that the flange 33 is flush with the top surface. If electrical insulation or special corrosion characteristics are required, the cup-shaped member 30 may be manufactured by stamping, drawing, forming, cold forging, machining, casting, or injection molding a metal sheet. The spring 40 is a coil spring, has a first end 42, is received against the abutment surface 35 of the bottom 30, and abuts a shoulder 43 formed by the head 22 of the fastener 20. Department 23 and. The fastener 20 is configured so that when the fork 25 engages the printed circuit board 67, the 'spring 40' is compressed to load the heat sink 10 on the printed circuit board. The fasteners are preferably of various sizes so as to accommodate heat sinks of various heights while maintaining a proper spring. The advantage 2B of the present invention clearly shows that the first end of the fastener does not extend beyond the top of 13. Therefore, without increasing the overall height of the heat sink assembly, 'the required spring force can be obtained, thereby improving the stacking tolerance of the printed circuit board. The spring is generally made of a material with the required spring characteristics' unless otherwise specified. Insulation and / or specific anti-corrosion are especially used in this case. Elastomer materials can be used. The spring can be made of metal wire I glue 34, formed in a ring 28. When abutting against the head hole above the bottom, a certain resistance to metal Rotor-shaped structure-end _ hole in the storage: the board 6 spring force can be formed by the figure of the heat sink PCB) metal, stamped -8-200528013 (6) or molded to form. The pre-composition of the fastener 20, the cup-shaped member 30, and the spring 40 can be easily squeezed through the hole in the bottom of the cup-shaped member 30, and then compress the spring 40 to the barb 2 6 This is achieved by engaging the bottom of the cup-shaped member 30. Thereafter, the cup-shaped member 30 can be seated in the hole of the bottom plate U, the bottom plate 11 can be assembled to the device 4 on the PCB 6, and the first end 21 of the fastener is depressed until the second end 24 penetrates Up to hole 7 in PCB 6. This installation can be achieved by mechanical means, such as radial radial forks 2 5 or welding, in which case no forks are required. The spring 40 loads the heat sink 10 against the electronic device 4 for effective heat transfer and heat dissipation. FIGS. 3A and 3B show a second specific embodiment of the connection device 2 in which the cup-shaped member 30 is not on the lip. 3 2 Set flange around. Instead, the bottom surface 18 of the heat sink base plate 11 is provided with a countersunk hole 19 along the hole 15 and the lip 3 3 is fitted into the countersunk hole 19. In addition, optionally, the cylindrical wall 37 of the cup-shaped member 30 may be provided with a shoulder to limit the travel within the hole 15 of the bottom plate 11. The cup-shaped member 30 can be connected to the bottom surface of the base plate by means of press fitting, threading, welding, brazing, gluing, and the like. The features of the fastener 20 and the spring 40 are substantially the same as those of the embodiment of FIGS. 2A and 2B. A holding member 50 in a C-clip configuration is provided to hold the fastener 20, the cup-shaped member 30, and the spring 40 together as a unit, which can be pre-installed on the heat sink 10 before being assembled to the PCB 6. 4A and 4B show a third embodiment of the connection device, which is substantially the same as the second embodiment, but modified to fit the use of another printed circuit board 6, which has a hole 15 at the top. Surface-9- 200528013 (7) Closed at 12 places. Here, the lever 28 and the spring 40 are slightly shorter than the connecting device for the heat sink 10 of Figs. 2A and 2B. The first end 21 of the fastener is located in a pocket below the top surface, and can only be accessed through an access hole 16 provided in the center of the hole 15. The advantage is that the heat sink 13 is not interfered above the connector, but can be accessed by a tool that is accommodated between the heat sinks 13. However, the heat sink may be provided with at least one notch 14 to provide sufficient clearance for the tool, the notch 14 may be a hexagonal key. FIG. 5 shows a fourth embodiment of a connection device using a conical tension spring 45. The first end 47 of the tension spring 45 is configured by a winding at the large end, and the second end 48 is formed by a distance from the large end. Shaped around the circle. The first end 4 abuts against the abutment surface 17 located on the top surface of the bottom plate 11, and the abutment surface 17 surrounds the hole 15; and the second end 4 8 abuts on the rod 28 formed away from the head 22.上 的 第二 肩部 29。 29 on the second shoulder. When the fastener 20 is pushed down so that the second end 48 engages the hole 7 in the PCB 6, the spring 45 is tightened, so the heat sink 10 is loaded on the electronic device 4. The advantage of this embodiment is that it provides a lower profile relative to the top surface 12 of the bottom plate 11 and reduces the number of components of the connector because the cup-shaped member and the holder are omitted. Although the present invention is described with exemplary embodiments, it should be understood that those skilled in the art can modify, add or delete the above embodiments, but these k acts should still be regarded as within the spirit and scope of the present invention. . The scope of the invention is not limited by the disclosed embodiments. [Brief description of the drawings] The features of the present invention will be described by adding -10- 200528013 (8) to the preferred embodiment shown in the following drawings, in which: Figure 1 shows the unfamiliar technique 'heat dissipation with a connection device installed Seat front view. Fig. 2A is an exploded perspective view of a heat sink and a connection device according to the first to preferred embodiments of the present invention. Figure 2 B is a front view of the heat sink with the device of Figure 2 A installed. Figure 3 A is an exploded perspective view of a heat sink and a connection device according to a second preferred embodiment of the present invention. · Figure 3 B is a front view of the heat sink with the device of Figure 3 a installed. Fig. 4A is a perspective view of a heat sink and a connecting device according to a third preferred embodiment of the present invention. FIG. 4B is a front view of the heat sink installed in the device of FIG. 4A. Fig. 5 is a front view of a heat sink with a connection device according to a fourth preferred embodiment of the present invention. [Description of main component symbols] φ 2 connection device 4 electronic device 6 printed circuit board * 7 hole-1 〇 heat sink 1 1 bottom plate 1 2 top surface 1 3 heat sink -11-200528013 (9) 14 recess 15 mounting hole 17 Abutment surface 1 8 Bottom surface 20 Fastener 2 1 First end 22 Head
2 4 第二末端 25 安裝叉 2 6 倒鉤 28 桿 29 第二肩部 3 0 杯形構件 3 2 唇 3 3 凸緣2 4 Second end 25 Mounting fork 2 6 Barb 28 Rod 29 Second shoulder 3 0 Cup-shaped member 3 2 Lip 3 3 Flange
3 4 底部 3 5 抵接表面 36 中間孔 3 7 圓筒形壁 40 彈簧 4 2 第一末端 4 3 第二末端 45 錐形張力彈簧 4 7 第一末端 -12 - 200528013 (10) 4 8 第二末端 50 固持件3 4 bottom 3 5 abutment surface 36 middle hole 3 7 cylindrical wall 40 spring 4 2 first end 4 3 second end 45 conical tension spring 4 7 first end -12-200528013 (10) 4 8 second End 50 holder
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