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CN100428111C - Method for eliminating electromagnetic wave interference of board card - Google Patents

Method for eliminating electromagnetic wave interference of board card Download PDF

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Publication number
CN100428111C
CN100428111C CN 200510078064 CN200510078064A CN100428111C CN 100428111 C CN100428111 C CN 100428111C CN 200510078064 CN200510078064 CN 200510078064 CN 200510078064 A CN200510078064 A CN 200510078064A CN 100428111 C CN100428111 C CN 100428111C
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method
eliminating
electromagnetic
card
wave
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CN 200510078064
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Chinese (zh)
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CN1881133A (en )
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江政雄
洪圣昌
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微星科技股份有限公司
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Abstract

本发明公开了一种介面卡,其装设于电脑机壳上,它包括印刷电路板,电路板上设有芯片组。 The present invention discloses an interface card, which is mounted to the computer case, which includes a printed circuit board, the circuit board is provided with a chipset. 散热鳍片组设于芯片组上,用以对芯片组进行散热,而位于印刷电路板一侧的固定板可使介面卡插置于电脑机壳的介面卡定位槽中。 Fin assembly provided on the chipset to dissipate heat to the chipset, and the printed circuit board side of the fixing plate interposed interface card can interface card in the computer enclosure positioning groove. 接地件的中段适当处具有弹性段,接地件的两端分别顶抵于固定板和散热鳍片组,致使芯片组工作时所产生的电磁波可经由散热鳍片组和接地件而导通至电脑机壳,藉以强化预防电磁滤(EMI)的效果。 When both ends of the elastic wave section, ground member at a suitable middle ground member are abutted against the fixing plate and the heat dissipating fins, so that the work generated by the chipset can be turned to the computer via the heat dissipation fins and the ground member cabinet, in order to strengthen the effect of preventing electromagnetic filter (EMI) is.

Description

介面卡和应用于介面卡的散热装置 Interface card and the interface card is applied to the heat sink

技术领域 FIELD

本发明涉及一种应用于各类资料处理设备的介面卡,尤其涉及一种成本低廉、强化预防电磁波效果的介面卡。 The present invention relates to a data processing device used in various types of interface card, in particular, to a low cost, preventing electromagnetic interface card strengthening effect.

背景技术 Background technique

随着科技的进步,使得电脑设备的性能日趋完善,而价位却逐渐低廉; 如今资料处理装置已成为产业运作、个人使用、乃至于家庭休闲娱乐中不可或缺的电子产品而深入到社会大众的日常生活中。 As technology advances, so that the performance of computer equipment are maturing, while the price has gradually low; data processing devices have now become industrial operation, personal use, and even indispensable in family leisure entertainment electronic products deep into the community daily life.

为满足不同的需求,电脑设备具有多种类型,例如肩负国家安全重任的军用国防超级电脑(Super Computer),广为业界所使用的伺服器主机 In order to meet different needs, with many types of computer equipment, such as shoulder the heavy responsibility of national security defense military supercomputer (Super Computer), widely used by the industry host server

(Server)、个人常用的桌上型电脑(Desktop Computer)、或便于商务人士携行的笔记本型电脑(Note Book)、甚或体积更为娇小的个人数字助理 (Server), commonly used personal desktop computer (Desktop Computer), or to facilitate business people to carry a notebook computer line (Note Book), even more petite volume of personal digital assistants

(Personal Digital Assist, PDA )等,它们已被社会大众使用多年。 (Personal Digital Assist, PDA), etc., they have been used for many years the community.

由于电脑设备的构成日益复杂,电子零部件常常彼此紧邻设置,因而分布密度相当高,此外,它们工作时还产生高频电磁波,由此衍生电磁波干4尤(Electro Magnetic Interference, EMI )与静电释方文(Electro Static Discharge, ESD)等问题。 Due to the increasing complexity of computer equipment configuration, electronic components are often arranged next to each other, and thus the distribution density is quite high, in addition, they are further operative to generate high frequency electromagnetic waves, electromagnetic waves derived therefrom, especially 4 Dry (Electro Magnetic Interference, EMI) and electrostatic release Fang (Electro Static Discharge, ESD) problems. 因此在产品销售之前,需经过振动、噪音等各项标准测试操作。 Therefore, before product sales, subject to the standard vibration, noise test operation. 由于电脑设备中包括很多电子零部件,电子零部件在工作时所产生的电磁波辐射对人体的中枢神经、生物体免疫功能、心血管系统、血液、视觉系统等都将造成伤害,因此,在各项标准测试操作中,尤以EMI电磁波检测最为重要。 Because computer equipment includes a number of electronic components, electronic components electromagnetic radiation generated during operation of the body's central nervous system, the organism immune function, cardiovascular system, blood, vision systems and so will cause harm, therefore, in the criteria test operation, especially in the most important EMI electromagnetic wave detection.

电脑设备中常见的电子零部件、如主机板、音效卡、显示卡等等各类介面卡通常是电磁波辐射的主要来源之一。 Computer equipment commonly found in electronic components, such as motherboards, sound cards, video cards, and so on all kinds of interface card is usually one of the main sources of electromagnetic radiation. 此类介面卡的基本组成是在印刷电路板上插置芯片组并设置适当的引线来连接印刷电路板上其他的电子元件。 Such basic components of the interface card is inserted in the chipset is provided a printed circuit board and connected to the appropriate leads to the printed circuit board to other electronic components. 然而在产品完成后进行电磁波检测时,可能出现印刷电路板上的芯片组或其他电子元件产生过高的电磁波辐射而无法通过检测程序的情况。 However electromagnetic wave detected after the completion of the product, a chipset or other electronic components on the printed circuit board generate excessive electromagnetic radiation can not be detected by the program may occur.

于是,必须重新设计介面卡上的引线和电子元件的配置,所完成的产品无法使用而报废。 Thus, the lead must be redesigned and electronic components arranged on the interface card, the finished product unusable and scrapped. 传统的补救方法是额外配置导电泡棉(gasket )、吸波材料(absorber )、铜箔、铝箔等以阻绝电石兹波。 The conventional remedy is to configure additional conductive foam (Gasket), absorber (absorber), copper, aluminum or the like to block the calcium carbide Zibo. 然而,这些方法不仅造成产 However, these methods are not only caused by production

品销售的延宕,并衍生附加的检修费用,或较为昂贵而难以实施。 Product sales delays and additional maintenance costs derived, or more expensive and difficult to implement. 再者, 上述部分措施效果欠佳,无法直接解决电磁波辐射问题。 Moreover, the partial measures ineffective, can not solve the problem of electromagnetic radiation directly.

对以上现有技术或现有产品所存在的缺陷应设法予以排除。 Above defects of the prior art or existing products that exist should seek to be excluded.

发明内容 SUMMARY

鉴于此,本发明要解决的技术问题是,提供一种可快速而有效地将产品中的电磁波辐射导出的介面卡。 In view of this, the present invention is to solve the technical problem is to provide a fast and efficient radiation of electromagnetic wave derived product interface card.

本发明的介面卡可应用在各种电脑设备中,其主要包括印刷电路板、 散热组件、固定板和接地件。 Interface card of the present invention can be applied in various computer equipment, which includes a printed circuit board, heat dissipation assembly, the fixed member and the ground plate. 其中,印刷电路板上设有工作所需的芯片组等电子组件(发热元件),散热组件设于芯片组上,其包括多片散热鳍片, 用以对芯片组进行散热。 Wherein the printed circuit board with electronic components such as a chip set desired work (heat generating element), heat dissipation assembly is provided on a chipset that includes a plurality of pieces of cooling fins for heat dissipation on the chipset. 固定板设于印刷电路板的一侧,以供印刷电路板插置固定在电脑机壳上。 A fixing plate provided on one side of the printed circuit board, for fixing the printed circuit board inserted in the computer case. 接地件的中段适当处具有弹性段,以使接地件的两端分别顶抵散热组件和固定板。 At the middle of the ground member having a suitable elastic segment, respectively, so that the heat dissipation assembly and abut against the fixed plate member grounded at both ends. 如此,芯片组工作时所产生的电磁波可经由散热组件和接地件而导通至电脑机壳。 Thus, when electromagnetic waves generated by the chipset work via the ground member and the heat dissipation assembly turned to the computer chassis.

本发明基于电子辐射可循最短途径导地的特性、利用接地件将芯片组的电磁波辐射传递至电脑机壳,可排除产品中过量电磁波辐射危害人体的问题。 The present invention is based on the electron irradiation turned to follow the shortest route characteristics, using electromagnetic radiation transmitting grounding member chipset to computer enclosure, the body can be eliminated a problem of excessive electromagnetic radiation harmful products. 本发明能快速而有效地导出电磁波辐射,并具有成本低廉、组成元件简单、易于实施等优点。 The present invention can be quickly and efficiently deriving electromagnetic radiation, and has a low cost, simple constituent elements, the advantages of easy implementation.

附图说明 BRIEF DESCRIPTION

为使本发明的上述目的和其他目的、特征、及优点能更明显易懂,下文特举几个优选实施方式并结合附图进行详细说明。 For the above objects and other objects, features, and advantages can be more fully understood by reading the following few preferred embodiments in conjunction with the accompanying drawings and described in detail.

图1为本发明介面卡的第一优选实施方式的立体示意图; 图2为本发明介面卡的第一优选实施方式的分解示意图; Figure 1 is a perspective view of the first preferred embodiment of the invention, the interface card; an exploded schematic view of a first preferred embodiment of the present invention, FIG. 2 interface card;

图3为本发明介面卡的第一优选实施方式的组配示意图; 图4为本发明介面卡的第二优选实施方式的分解示意图; 图5为本发明介面卡的第二优选实施方式的组配示意图; 图6为本发明介面卡的第三优选实施方式的分解示意图; 图7为本发明介面卡的笫三优选实施方式的第一动作示意图;图8为本发明介面卡的第三优选实施方式的第二动作示意图。 Group second preferred embodiment of the present invention, the interface card in FIG. 5; FIG. 3 is a schematic view of the group with a first preferred embodiment of the interface card of the present invention; FIG. 4 is an exploded view of a second preferred embodiment of the present invention, the interface card Hotels schematic; Fig. 6 an exploded schematic view of a third preferred embodiment of the present invention, the interface card; a schematic view of a first preferred embodiment of the operation of three Zi embodiment of the present invention, interface card of FIG. 7; FIG. 8 is preferably a third interface card of the present invention a second operation of the embodiment of FIG.

附图标记说明 REFERENCE NUMERALS

10 印刷电路板 The printed circuit board 10

11 芯片组 11 Chipset

20 散热组件 Heat dissipation assembly 20

21 散热鳍片 21 cooling fins

30 固定板 Plate 30 is fixed

31 螺孔 31 holes

32 圓孔 32 hole

40 接地件 40 pieces of ground

41 弹性段 Flexible section 41

42 通孔 42 through hole

43 4氐压部50 接地件 Di pressing portion 434 is grounded member 50

60 散热组件 Heat dissipation assembly 60

61 散热鳍片 Radiation fins 61

62 活动鳍片 62 activities fins

63 传导部 63 conduction part

64 弹性段100 电脑机壳 64 Flexible section 100 computer case

110 介面卡定位槽 Positioning groove 110 interface card

具体实施方式 detailed description

本发明的介面卡可应用在包括但不局限于桌上型电脑(desktop )、伺服器(server )、笔记本型电脑之类的电脑设备中,现参考图1至图3来说明本发明的第一优选实施方式。 Interface card in the present invention can be applied include but not limited to a desktop computer (Desktop), the server (Server), notebook computer or the like in the computer equipment, with reference now to FIG. 1 to FIG. 3 of the present invention will be described a preferred embodiment. 其中,电脑设备包括电脑机壳100,电脑机壳100的一侧开设有多条介面卡定位槽110。 Wherein the computer apparatus comprises a computer housing 100, the housing 100 defines one side of the computer a plurality of positioning grooves 110 interface card.

按照本发明的第一优选实施方式,本发明的介面卡主要由印刷电路板10、散热组件20、固定板30与接地件40组成。 According to a first preferred embodiment of the present invention, the present invention consists essentially of interface card 10, the printed circuit board heat dissipation assembly 20, the fixed member 40 and the ground plate 30 composed. 印刷电路板10上设有芯片组11和工作所需的其他电子元件,并设置有使其彼此连接的引线,由于这些均为现有技术,所以本发明对称之为印刷电路板10的技术细节不再赘述,且在附图中仅示意地而未详细绘出,显然,对不同种类的产品装配有不同的电子元4牛。 The printed circuit board 10 is provided on the chip set 11 and the other electronic components required for the work, and it is provided with a lead wire connected to each other, since these are the prior art, the present invention is referred to the technical details of the printed circuit board 10 omitted, and only schematically depicted without details in the drawings, it is clear, the electronic unit 4 has a different bovine different types of product assembly.

散热组件20由多片散热鳍片21 (heatsink)组成,其设置在芯片组ll 上,用以对芯片组11进行散热。 Sheet assembly 20 by a plurality of heat radiation fins 21 (heatsink), whose group is provided on the chip ll, chip set 11 for heat dissipation. 固定板30装设在印刷电路板10的侧边, 且固定板30上设有螺孔31,可供外部螺钉穿过,以使印刷电路板10插置固定在电脑机壳IOO的介面卡定位槽110处。 A fixing plate 30 mounted on the side of the printed circuit board 10 and the fixing plate 31 provided with holes 30, for external screw passes through, so that the printed circuit board 10 fixed to the interface card inserted in the computer case positioned in IOO 110 slots.

接地件40由导电金属制成,其两端分别接触或顶抵于散热组件20和固定板30。 Grounding member 40 made of conductive metal, both ends thereof are in contact with or abutting against the fixed plate 20 and the heat dissipation assembly 30. 接地件40对应固定板30的一端设有与螺孔31对应的通孔42, 而与散热组件20相接的一端则弯折出抵压部43 ,借以增进抵触连接的效果。 One end of the ground member 40 corresponding to the fixing plate 30 is provided with a through hole 31 corresponding to screw hole 42 and one end of the heat dissipation assembly 20 contact the pressing portion 43 is bent, thereby enhancing the effect of inconsistent connection. 接地件40的中段适当处凹陷形成弹性段41,可适应散热組件20和固定板30的组装公差,以使接地件40很好地顶抵两者。 Middle ground member 40 is formed of a suitable resilient section of the recess 41, can accommodate assembly tolerances heat dissipation assembly 20 and the fixing plate 30 to the ground member 40 abuts against both the well.

基于电子辐射循最短途径导地的特性,芯片组11工作时所产生的电磁波辐射将通过散热组件20上的散热鳍片21传导至接地件40,继而由接地件40再导通至电脑机壳100,而将电磁波辐射导出。 Based on the radiation characteristics of the electronic guide to follow the shortest route, the chip group electromagnetic radiation generated by the work 11 through the heat conductive assembly 21 on the heat-dissipating fins 20 to the ground 40, the ground member 40 is then turned again to the computer housing 100, and the electromagnetic radiation export.

接着,参考图4与图5来说明本发明的第二优选实施方式。 Next, with reference to FIG. 4 and FIG. 5 illustrates a second preferred embodiment of the present invention. 第二优选实施方式与前一优选实施方式的组成大致相同,主要包括印刷电路板10、 散热组件20、固定板30与接地件50。 Second preferred embodiment the composition with a preferred embodiment of the former embodiment is substantially the same, including a printed circuit board 10, heat dissipation assembly 20, the fixed member 50 and the ground plate 30. 印刷电路板IO上设有芯片组11,散热组件20由多片散热鳍片21组成,它们设于芯片组11上。 Chipset 11 is provided, the heat dissipation plate assembly 20 by a plurality of heat-dissipating fins 21 on the printed circuit board composed of the IO, which are provided on the chip group 11. 固定板30设于印刷电路板10的一侧,以使印刷电路板10插置固定在电脑机壳100的介面卡定位槽110上。 The fixing plate 30 is provided on one side of the printed circuit board 10 to the printed circuit board 10 inserted in the computer housing is fixed positioned slot 110 interface card 100. 不同的是,第二优选实施方式中的固定板30于适当处开设有圆孔32,而接地件50优选可选用长轴固定螺钉。 The difference is that, in the second preferred embodiment is fixed to the plate 30 defines a circular hole 32 at a suitable, preferably grounded member 50 may be selected major axis screw. 于是,当印刷电路板10装配在电脑机壳IOO的定位槽110上后,将接地件50穿过圆孔32, 以锁接或顶抵的方式与散热组件20接触。 Thus, when the printed circuit board 10 is mounted on the computer chassis rear IOO positioning groove 110, the ground member 50 through the circular hole 32, locking element contacting or abutting manner and the radiator assembly 20. 因此,芯片组11工作产生的电f兹波可依序经由散热组件20和接地件50而被传导至固定板30和电脑机壳亂 Thus, electrical work f Zibo chipset 11 may be sequentially generated via the heat dissipation assembly 20 and the ground conductive member 50 is fixed to the plate 30 and the computer chassis chaos

关于本发明的第三优选实施方式,请参考图6至图8,该实施方式是针对介面卡上的散热结构进行改良的设计。 About a third preferred embodiment of the present invention, please refer to FIG. 6 to FIG. 8, this embodiment is improved heat dissipation structure for the interface card design. 第三优选实施方式应用在印刷电路板10上,而此印刷电路板10上至少设有一芯片组11,并被设置在电脑机壳100内。 The third preferred embodiment of the application on the printed circuit board 10, and a chipset 11 is provided at least on this printed circuit board 10, and is disposed within the computer case 100. 第三优选实施方式主要披露了一种应用于介面卡的散热组件60,其装配在芯片组ll之上,它主要包括多片散热鳍片61和活动鳍片62。 The third preferred embodiment is disclosed embodiment mainly one kind of heat applied to the interface card assembly 60, which is fitted over the chipset ll, which mainly comprises a multi-piece heat-dissipating fins 61 and fins 62 activity. 散热鳍片61以间隔排列的形式成形设置,以对芯片组11进行散热。 Shaped heat-dissipating fins 61 arranged to form spaced, chipset 11 to dissipate heat. 活动鳍片62的作用等同于散热鳍片,其邻设在最侧边的散热鳍片61的一侧, 活动鳍片62的一端延伸有传导部63。 Activities fin effect equivalent to the heat radiation fins 62, which is disposed adjacent to one side of most side edges of cooling fins 61, the fins 62 end of the movable conductive portion 63 extends. 特别的是,活动鳍片62必要时可相对芯片组ll旋转。 In particular, the relative activity chipset ll fin 62 rotates necessary. 于是,当对印刷电路板10完成组装操作后,散热组件60上的活动鳍片62即可旋转,直到搭触电脑机壳100为止,以便将芯片组11工作时所产生的电磁波经活动鳍片62而导通至电脑机壳100,活动鳍片62的中段处设有弹性段64,且活动鳍片62的一端弯折有传导部63,借以增进与电脑机壳100的接触效果。 Thus, when the printed circuit board 10 to complete the assembly operation, the heat dissipating fins active assembly 6062 can be rotated until the computer case take up contact 100, so that the chipset work 11:00 electromagnetic waves generated by the activities of the fin 62 is turned on to the computer chassis 100, the movable fins 62 provided at the middle of the elastic section 64, and the bent end of the movable fins 62 with a conductive portion 63, thereby enhancing the effect of the contact 100 of the computer enclosure.

基于电子辐射循最短途径导地的特性,本发明的介面卡使用接地件将电磁波辐射传递至电脑机壳,借以排除产品中过量电磁波辐射的问题。 Based on the radiation characteristics of the electronic guide to follow the shortest route, the interface card according to the present invention uses electromagnetic radiation to the ground member is transmitted to the computer case, so as to exclude products of excess electromagnetic radiation problem. 本发明所4皮露的优选实施方式能快速而有效地导出电^兹波辐射,并具有成本低廉、组成元件简单、易于实施等优点。 4 the preferred embodiment of the present invention can be exposed skin quickly and efficiently deriving electrically ^ Zibo radiation and having a low cost, simple constituent elements, the advantages of easy implementation.

以上仅对本发明的优选实施方式进行了描述,显然,本发明不限于所述实施方式,凡在本发明的构思范围内作出的等同变换与修饰皆应落入本发明权利要求所要求保护的范围。 The above embodiment is only a preferred embodiment of the present invention have been described, obviously, the present invention is not limited to the embodiments, where the modified transform and equivalents made within the spirit scope of the invention are intended to fall within the claims of the present invention, the scope of the claims .

Claims (7)

1.一种介面卡,其装设于电脑机壳上,该电脑机壳的一侧设有介面卡定位槽,所述介面卡包括: 印刷电路板,该印刷电路板上至少设有一芯片组; 散热组件,其由多片散热鳍片构成,该散热组件设置于所述芯片组的顶表面上,用以对所述芯片组进行散热; 固定板,其装设于所述印刷电路板的一侧,借助于该固定板使所述印刷电路板被插置于所述介面卡定位槽中;及接地件,其中段的适当处具有弹性段,以使该接地件的一端顶抵于所述散热组件,而另一端顶抵于所述固定板,并使所述芯片组工作时产生的电磁波依序经由所述散热组件和接地件而导通至所述电脑机壳。 An interface card, which is mounted to the computer case, one side of the housing is provided with a computer interface card positioning groove, said interface card comprising: a printed circuit board, the printed circuit board is provided with at least a chipset ; cooling assembly, which consists of multi-piece heat-dissipating fins, the heat-dissipating component disposed on a top surface of the chipset to dissipate heat to the chipset; fixing plate, which is mounted on the printed circuit board side, by means of which the fixing plate is interposed printed circuit board of the interface card positioning groove; and a grounding member, which has a suitable elastic segment of the segment, so that one end of the ground contact member to the top said heat dissipation assembly, and the other end abutting against the fixing plate, and electromagnetic waves generated when the chipset work sequentially through the cooling assembly and the ground member turned to the computer enclosure.
2. 如权利要求1所述的介面卡,其中,所述固定板上设有供外部螺钉穿过的螺孔。 2. The interface card according to claim 1, wherein the fixing plate is provided with an external screw for screw therethrough.
3. 如权利要求2所述的介面卡,其中,所述接地件的一端设有与所述螺孔对应的通孔。 3. The interface card according to claim 2, wherein an end of the ground member provided with through holes corresponding to the screw hole.
4. 如权利要求1所述的介面卡,其中,所述接地件对应于所述散热组件的一端弯折有一抵压部。 4. The interface card according to claim 1, wherein an end of the heat dissipation assembly corresponding to said ground member has a pressing portion is bent.
5. —种介面卡,其装设于资料处理设备的电脑机壳上,而该电脑机壳的一侧设有介面卡定位槽,所述介面卡包括:印刷电路板,该印刷电路板上至少设有一芯片组;散热组件,其由多片散热鳍片构成,该散热组件设置于所述芯片组的顶表面上,用以对所述芯片组进行散热;固定板,其装设于所述印刷电路板的一侧,借助于该固定板使所述印刷电路板被插置于所述介面卡定位槽中,且该固定板上设有圆孔;及接地件,其可穿过所述圆孔而以锁接或顶抵的方式与散热组件接触,通至所述电脑机壳。 5. - kind of interface card, which is mounted on the information processing apparatus of the computer case, one side of the computer case and is provided with positioning interface card slots, the interface card comprising: a printed circuit board, the printed circuit board at least provided with a chipset; cooling assembly, which consists of multi-piece heat-dissipating fins, the heat-dissipating component disposed on a top surface of the chipset to dissipate heat to the chipset; fixing plate, which is mounted on the one side of said printed circuit board, by means of which the fixing plate is interposed printed circuit board of the interface card positioning groove, and the fixing plate is provided with a circular hole; and a grounding member, which may pass through the said circular holes so as to abut against locking element or in contact with the cooling assembly, passed to the computer enclosure.
6. —种应用于介面卡的散热装置,其装设于印刷电路板上,而该印刷电路板被容设于电脑机壳内,该印刷电路板上至少设有一芯片組,所述散热装置包括:多片散热鳍片,它们i殳置于所述芯片组的顶表面上,用以对该芯片组进行散热;一活动鳍片,其邻设在最侧边的散热鳍片的一侧,并可选择地相对于所述芯片组旋转,而与所述电脑4几壳4荅触,以4吏所述芯片组工作时产生的电磁波经由该活动鳍片而导通至所述电脑机壳。 6 - is applied to the heat sink types of interface card, which is mounted on a printed circuit board, and the printed circuit board is accommodated inside the computer case, the printed circuit board is provided with at least one chip set, the heat sink comprising: a multi-piece heat-dissipating fins, which i Shu disposed on a top surface of the chipset, and the chipset to dissipate heat; a movable fin, which is disposed adjacent to one side of most side edges of the heat dissipating fins , and optionally the chipset with respect to rotation, with said computer housing 4 Da several contact 4, electromagnetic waves generated when the chipset 4 officials work through the active guide to the fins through the computer machine shell.
7.如权利要求6所述的散热装置,其中,所述活动鳍片的一端延伸有一传导部。 7. The heat dissipation device as claimed in claim 6, wherein the movable end of the fin extends a conductive portion.
CN 200510078064 2005-06-14 2005-06-14 Method for eliminating electromagnetic wave interference of board card CN100428111C (en)

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