CN1138228A - 高性能卡缘接插件 - Google Patents

高性能卡缘接插件 Download PDF

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CN1138228A
CN1138228A CN96106158A CN96106158A CN1138228A CN 1138228 A CN1138228 A CN 1138228A CN 96106158 A CN96106158 A CN 96106158A CN 96106158 A CN96106158 A CN 96106158A CN 1138228 A CN1138228 A CN 1138228A
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edge connector
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F·A·哈瓦思
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Molex LLC
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70Coupling devices
    • H01R12/71Coupling devices for rigid printing circuits or like structures
    • H01R12/72Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures
    • H01R12/73Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures connecting to other rigid printed circuits or like structures
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70Coupling devices
    • H01R12/71Coupling devices for rigid printing circuits or like structures
    • H01R12/72Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures
    • H01R12/721Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures cooperating directly with the edge of the rigid printed circuits
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/50Fixed connections
    • H01R12/51Fixed connections for rigid printed circuits or like structures
    • H01R12/52Fixed connections for rigid printed circuits or like structures connecting to other rigid printed circuits or like structures
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70Coupling devices

Abstract

一种卡缘接插件(10),其外壳(16)上壁(18)有槽(38)供容纳细长印刷电路卡用。槽横切的横腔(28)中装有端子(44,46,48)。一对信号端子(44,46)处在间隔空腔部分(28A)中,接地端子(48)处在间隔空腔部分(28B)中。各端子有板接触部分(52,64,74)和卡接触部分(56,68,80),前者向下延伸与印刷电路板连接,后者处在槽中与插入卡触片接合。各信号端子对位于槽同一侧两接地端子侧,且可横向与槽另一侧接地端子对置。空腔结构相同,可装一接地端子或一对信号端子。

Description

高性能卡缘接插件
本发明涉及印刷电路板用的一种电气接插件,更具体地说,涉及高频电路常用的一种高密度、低阻抗卡缘接插件。
卡缘接插件广泛用以将印刷电路卡(叫做子卡)与印刷电路板或母板连接起来。一般卡缘接插件的绝缘外壳都有一个卡缘承接槽和许多电气端子承接腔。各端子都有多个板触件和卡触件,前者从外壳向下延伸,后者与插入承接槽的卡片边缘上的导电片接合。外壳装在母板上,各板触件焊接到母板的导电部位。卡缘接插件承接着可加以拔除的子卡,各端子则形成卡上导电片与板导电部位之间的导电通路。
为改进性能,提高操作速度和增加电路密度已成为采用印刷电路的数字式电子电路的重要趋势。例如,微处理机的工作频率不断提高,通过各种各样的通道与诸如存储器、显示器等之类的辅助设备联系所使用的并联连接线路数不断地增加。这些倾向对于同这些电路配用的接插件在设计上带来种种问题。
为达到电路高密度的目标,可能需要缩小截面积较小的各端子间的间距。为满足高频工作的要求,需要低阻抗来适应数字脉冲快速的上升时间和宽阔的带宽。而电路间距小了会增加容性耦合引起串扰的可能性,还会使阻抗因信号通路长和/或窄而提高。此外,在高频下可能还需要进行屏蔽,以免受外界的干扰。现有的卡缘接插件造价高,结构复杂到不希望有的程度,然而在设计上仍然还不能完全有效地达到好几个有时还是相互矛盾的目标。
本发明的主要目的是提供一种改进的高性能卡缘接插件。本发明的其它和更具体的目的是提供一种线路密度高、阻抗低的接插件;提供一种适宜与高频数字信号配用的接插件;提供一种串扰减小到最小程度的接插件;提供一种具有抗干扰屏蔽性能的接插件;和提供一种改进的、克服了过去使用的卡缘接插件缺点的接插件。
简单说,本发明提供了一种供可拔除的印刷电路卡用的卡缘接插件,其接合缘上有多个导电片,接插件的绝缘外壳有细长的上壁和下壁,还有彼此分开的细长侧壁。多个横腔在两个侧壁之间延伸。上壁有一个细长槽承接着电路卡的接合缘。该槽横切各空腔,将空腔在槽两侧分成许多一条条排列的相同空腔部分。多个接地端子和信号端子坐落在各空腔部分,各端子都有一安装部分和接触部分,前者用以将端子固定在其中一个空腔部分中,后者用以在接合缘插入槽中时与其中一个触片接合。这种卡缘接插件的特征在于,在每组彼此间隔开的第一空腔部分中都设有单独一个接地端子,在每组第二空腔部分中都设有多个信号端子,且每个第二空腔部分都毗邻其中一个第一空腔部分。
要理解本发明连同上述和其它目的和优点最好阅读下面有关本发明图示最佳实施例的详细说明。
图1是按本发明构制的用以将印刷电路母板与印刷电路子板互连起来的高性能卡缘接插件的等角视图。
图2是沿图3的2-2线截取的接插件经放大了的片段水平剖视图。
图3是沿图2的3-3线截取的接插件剖视图。
图4是沿图2的4-4线截取的接插件剖视图。
图5是图1的子卡部分经放大了的片段正视图。
图6是图1的母板部分经放大了的片段平面图。
图7的视图与图3类似,示出了本发明的另一个实施例,是沿图9的7-7线截取的剖视图。
图8是图7的接插件沿图9的8-8线截取的剖视图。
图9是接插件沿图7的9-9线截取的经放大了的片段水平剖视图。
图10是与图7的接插件配用的子卡部分经放大了的片段正视图。
图11是与图7的接插件配用的母板部分经放大了的片段平面图。
现在参看附图。图1示出了按本发明的原理构制的卡缘接插件10连同印刷电路母板12和印刷电路子卡14。举例说,在一般的应用中,板12可以是装有数字电子器件的计算机或其它电子设备的母板,卡14可以是装有诸如存储器等之类的电子器件的较小印刷电路板或子板。接插件10装在板12上,卡14可拔除地插入接插件10中,以便使板12与卡14之间形成电连接。
接插件10的结构如图1~4中所示。接插件的外壳16由模塑塑料制成,有细长的上壁18、下表面20和对置着的细长侧壁22和24。外壳16两端设有突出的引卡部分26。外壳可配有固定件和安装销(图中未示出),从下壁20向下延伸,将处壳16固定在板12上,直到焊接时与平行于板表面的下壁20永久连接在一起为止。这些特点在例如美国专利5,259,768中都公开过。
许多个排成一排的端子承接腔28在侧壁22与24之间横向延伸。外壳16的间壁30将这些空腔分隔开,各空腔28的上部分被上壁18封闭,其下部分通到底表面20。外壳16中间有一个细长的内安装轨32。端子隔片突块34从靠近外壳16底部的侧壁22向外伸出。
子卡14有一个接合缘36。外壳16的细长槽38沿上壁18的中线形成,供承接接合缘36用。引卡部分26在接合缘36插入槽38的过程中起辅助作用。外壳16有若干键或横臂40横切槽38延伸且坐落在接合缘36的键槽或沟道42中起定位或锁定作用。槽38横切空腔28和壁30,将空腔分成在槽38两边彼此对置的横向排列的空腔部分28A和28B。所有的空腔28彼此都相同,所有的空腔部分28A和28B也相同,只是相对于槽38的取向不同而已。槽38的底壁39以间壁30的各部分为界。
母板12与子卡14之间的电连接借助于信号端子44和46以及坐落在空腔28中的接地端子48进行。端子44、46和48由导电金属板通过例如模压、冲压和成形形成,在图示的方案中,通过下表面20装入空腔28中。
各接地端子48就位时其基部50通常与下表面20吻合。板触件或尾部52从基部50向下延伸,以便与板12的导电部位连接。大面积板部分54从基部50向上延伸,柔质弹性簧臂部分56从板部分54伸出。簧臂部分56到位于卡14插入接合缘36通路上的槽38内的卡触件部分58处终止。安装部分或臂60借助于摩擦力承接臂60与板部分54之间的侧壁22或24,使接地端子48固定就位。臂60坐落在一对凸块34之间。
各“内部”信号端子44的基部62通常在端子就位时与底表面20叠合。板触件或尾部64从基部62向下延伸,以便与板12的导电部位连接。柔质弹性簧臂部分66从基部62延伸。簧臂部分66到位于卡14插入接合缘38通路上槽38内的卡接触部分68终止。安装部分或安装销70借助摩擦力坐落在轨32中,从而使信号端子44固定就位。
各“外部”信号端子46的基部72通常在端子就位时与底表面20叠合。板触件或尾部74从基部50向下延伸。以便与板12的导电部位连接。臂部76从基部72向上延伸,柔质弹性簧臂部分78从臂部76延伸。簧臂部分78到位于卡14插入接合缘36通路上槽38内的卡接触部分处终止。安装部分或安装臂82借助摩擦力承接臂82与臂部76之间的侧臂22或24使信号端子46就位。臂82坐落在一对凸块34之间。
接插件10是通过在空腔部分28A或28B中装设一个以上的分立信号触件达到高触件密度效果的。从图3和图4中可以看到,信号触件44和信号触件46并排装设在单一空腔部分中。端子44和46彼此间隔一段距离分开,互不接触,所以在电气上是彼此独立的。这样,两个独立的电信号可以通过单个空腔部分28A或28B传导。
阻抗控制、信号隔离和串扰抑制是通过将接地端子48散置在信号端子44和46之间达到的。每隔一个空腔部分28A和每隔一个空腔部分28B配置一个接地端子48。其余相间配置的空腔部分28A和28B分别配置了一对信号端子44和46。槽38两侧有相间配置的接地端子和信号端子的图形。从图2可以看到这种连续图形的一部分。最好这些图形在槽38两侧交错配置,从而使一对信号端子44和46在各空腔28中直接面对着单个接地端子48。
在接插件10的端子图形中,各信号端子对44、46处在一对侧面接地端子48之间,而且还与对置在槽38另一侧的接地端子48对齐。这样布局具有同轴传输路径的某些好处,其中信号导线周围总有一个接地导线,但密度显著地增加了,材料消耗显著地减少了,装配费也显著下降。
限制接插件10造价的一个因素是设计的模件化。各同样的空腔28的各同样的空腔部分28A或28B无需对外壳结构进行任何修改就可以容纳单个接地端子48或一对信号端子44和46。将指形部分70插入中间的安装导轨32就可以把所有的信号端子44配置在外壳16纵向中心附近,而且可以装在空腔部分28A或空腔部分28B中槽38的任一侧。令臂部分60或臂部分82与侧壁22或24接合就可以将信号端子46或接地端子48装入任何空腔部分28A或28B中。
减少串扰的方法是将接地端子48和信号端子44及46构制得使信号端子44和46与接地端子48之间优先连接,而不是使信号端子44和46之间直接连接。从图3和图4中可以看到,接地端子48的大面积连续的板部分54,其周边或轮廓围绕或覆盖信号端子44的簧臂部分66和信号端子46的臂部76和簧臂部分78。基部50也覆盖基部62和72。
基本上所有通过信号端子44和46的信号电流通路都配置在紧挨接地端子48的各大面积部分之间。接地端子48较大的面积和数量达到了接地平面的效果且减小了接地电感。此外,间壁30将接地端子48与成对的信号端子44和46分隔开来。这些间壁是外壳16的一部分,是由模制的绝缘塑料制成的,而各对信号端子的端子44和46则由空气分隔开。外壳的绝缘材料增加了各信号端子44和46与毗邻的接地端子的耦合,各信号端子之间为空气所隔开则最大限度地减小了信号端子44与46之间的耦合。
信号端子44的卡接触部分68在槽38两侧排成两排,且平行于底壁20。这两排与底壁20的间距相等,且距槽38的底部39较近。信号端子46的卡接触部分80也在槽38两侧排成两排,且平行于底壁20。这两排与底壁20等间距,位于两排卡接触部分68上方。接地端子46的卡接触部分58也在槽38两侧排成两排,且平行于底壁20。这两排与底壁20等间距,位于两排卡接触部分68和80的上方。
接地卡接触部分58比信号卡接触部分68和80高,因而接地端子48起了干扰屏蔽作用。接地通路呈天蓬或伞形笼罩着信号电流通路,起了屏蔽信号电流通路的作用,使信号电流通路免受电磁干扰。
端子44、46和48的卡接触部分高密度地配置。各对信号端子44和46的卡接触部分68和80在垂直方向彼此间隔一段距离并配置在同一垂直平面上。横向对置的接地端子48的卡接触部分58处在该同一垂直平面上。两侧面接地端子48的卡接触部分48在纵向上与该垂直平面的间距等于在外壳中各端子的间距,即等于空腔28各中心线之间的间距。
从图5中可以看到,卡14的一排触片84构制得使其与卡接触部分58和80接合。第一排信号触片86沿接合缘36排列。卡14插入槽38中时,触片86与信号端子44的卡接触部分68接触。第二排信号触片88处在触片86上方。卡14插入槽38中时,触片88与信号端子44的卡接触部分80接触。第三排接地触片90处在触片86和88上方。卡14插入槽38中时,触片90与接地端子48的卡接触部分58接触。图5示出了卡14的两个表面之一。背面的情况与正面类似,只是各触片在纵向上偏移一段等于接插件间距的距离,信号触片86和88在卡与背面上的接地触片90对齐的一个表面上。
端子48、44和46的板触件或尾部52、64和74排列得使其不仅是最大限定地提高了接插件10内的电路密度,而且也最大限度地提高了母板10界面处的电路密度。信号端子46的板接触部分74在外壳16两侧纵向平行排列成两排。信号端子48的板接触部分64位于外壳16中间附近纵向平行排列成两排。接地端子48的板接触部分52在板接触部分74与64之间平行排列成两排。各排板接触部分横切插件10的宽度方向等间距配置,间距最好等于接插件的间距。
从图6可以看到板12上导电部位的组合方式92。各导电部位94的中线都与信号端子44的板接触部分64接合。各导电部位96的外线与信号端子的板接触部分74接合。各导电部位98的中线与接地端子48的板接触部分52接合。横向间距都等于接插件间距,这使图6所示的组合92均匀交错,而且使信号高密度分布。
在所示的方案中,导电部位94、96和98是板12的镀通孔,板接触部分52、64和74则为焊点或针触件,用周知的流动焊接法焊接就位时适宜插入它们要焊的各孔中。不然也可以采用象表面安装脚触件之类的其它触件,而以各触件用周知的表面安装焊接法焊接到所在的板表面上的电镀区作为导电部位94、96和98。
图7~11示出了本发明的另一个实施例电气接插件110。接插件10和110上同样的编号表示它们在结构特点上是相同的。
接插件10中,各间隔的空腔部分28A和28B中装的不是接地端子48就是信号触件44和46。因此,从图2中可以看到,接地通路和信号电流通路交替配置,各信号端子对44、46处在一对接地端子48之间。接插件110(图9)中,信号端子对44、46坐落在两毗邻的空腔部分28A或28B中,成对的信号端子腔则处在装有接地端子的空腔28A或28B之间。信号端子的接地效果没有接触件10的方式好,但信号容量或电路密度却提高了。每一对信号端子44和46紧靠接地端子48,每一个信号通路都能有效地接地。
接插件110的板接触部分52、64和74的图形与接插件10的不同。因此,如图11中所示,母板10上导电部位或镀通孔94、96和98的图形变了。另外,由于端子安排方式不同,信号触片86和88以及接地触片90在子卡12上的安排也不同。
从图7和图8可以看得最清楚,接插件110接地端子48的安装部分或臂60’比信号端子46的相应部分或臂82长。臂60’朝上壁18方向延伸到臂82和隔片34之外。接插件110的导电金属屏蔽件112的上壁114和侧壁116到扩大了的外缘118处终止。外缘118与臂60’的端子接合,从而使屏蔽件通过多个电阻和感抗都很低的并联电路接地。
图7和图8示出了将各端子保持在外壳中的另一种结构。外壳略加改装,特别适用于各端子手工装入而不是用自动化装备装入空腔部分28A、28B的应用场合。接插件110导轨32的向下延伸部分32A位于装有接地端子48的各空腔部分28A或28B中。这些部分阻止了端子44的安装部分70进到安装导轨32的孔中。由此产生的锁定作用防止了信号端子因疏忽而装入应装接地端子48的空腔部分。
至此已就本发明在附图中所示的实施例的细节说明了本发明的内容,但这些细节并不构成本发明在本说明书所附权利要求书中所述范围的限制。

Claims (11)

1.一种供可拨除的印刷电路卡(14)用的卡缘接插件(10),其接合缘(36)上有多个导电片(86,88,90),所述接插件包括:
绝缘外壳(16),有细长的上壁(18)和下壁(20)以及彼此分开的细长侧壁(22,24);
多个横腔(28),在所述两侧壁之间延伸;
细长槽(38),在所述上壁上,供承接电路卡的接合缘用,所述槽横切所述各空腔,将各空腔在所述槽的两侧分成许多同样排列成行的空腔部分(28A,28B);和
多个接地端子和信号端子(44,46,48),坐落在所述各空腔部分中,各所述端子有一安装部分(60,70,82)和接触部分(56,58,80),前者用以将所述端子固定在其中一个所述空腔部分中,后者用以在接合缘插入所述槽中时与其中一个触片接合;
所述卡缘接插件的特征在于:
在每组彼此间隔开的第一空腔部分(28B)中都设有所述接地端子(48)中的单独一个,在每组第二空腔部分(28A)中都设有多个所述信号端子(44,46),且每个所述第二空腔部分都毗邻其中一个所述第一空腔部分。
2.如权利要求1所述的卡缘接插件,其特征在于,所述第一和第二空腔部分沿所述外壳的长度方向交替配置。
3.如权利要求1所述的卡缘接插件,其特征在于,所述第二空腔部分的其中两个配置在各对所述第一空腔部分之间。
4.如权利要求1所述的卡缘接插件,其特征在于,各所述第二空腔部分装有第一和第二个信号端子。
5.如权利要求4所述的卡缘接插件,其特征在于,所述第一和第二信号端子都有毗邻所述下壁的基部(62,72)和从所述基部延伸到所述接触部分的一弹性部分(66,78),所述第一和第二信号端子的所述接触部分彼此间隔开。
6.如权利要求5所述的卡缘接插件,其特征在于,所述接地端子有一个基部(50)毗邻所述下壁和一个板部(54),其周边覆盖住毗邻的第一和第二信号端子的所述弹性部分。
7.如权利要求5所述的卡缘接插件,其特征在于,所述第一和第二信号端子的所述接触部分垂直排列。
8.如权利要求7所述的卡缘接插件,其特征在于,所述接地端子的所述接触部分与所述下壁的距离比与所述第一和第二信号端子的所述接触部分的距离大。
9.如权利要求1所述的卡缘接插件,其特征在于,所述槽一侧的各所述第一间隔空腔部分与所述槽另一侧的其中一个所述第二间隔空腔部分对置着。
10.如权利要求9所述的卡缘接插件,其特征在于,各所述第二空腔部分装有接触部分垂直排列且彼此间隔开的第一和第二信号端子,各所述第一空腔部分装有接触部分在毗邻的第一和第二信号端子的接触部分之间纵向偏移的接地端子。
11.如权利要求9所述的卡缘接插件,其特征在于,所述第一信号端子的接触部分处在平行于所述下壁的第一排上,所述第二信号端子的接触部分处在平行于所述第一排的第二排上,且与所述下壁的距离比与所述第一排的大,所述接地端子的接触部分处在平行于所述第二排的第三排上,且与所述下壁的距离比与所述第二排的大。
CN96106158A 1995-04-28 1996-04-27 高性能卡缘接插件 Expired - Fee Related CN1107998C (zh)

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CN1107998C (zh) 2003-05-07
JPH08306446A (ja) 1996-11-22
KR100244435B1 (ko) 2000-02-01
EP0740373B1 (en) 2002-02-27
EP0740373A2 (en) 1996-10-30
US5730609A (en) 1998-03-24
CA2172219A1 (en) 1996-10-29
JP3054420U (ja) 1998-12-04
KR960039502A (ko) 1996-11-25
TW312859B (zh) 1997-08-11
EP0740373A3 (en) 1997-11-05
US5580257A (en) 1996-12-03
DE69619429D1 (de) 2002-04-04
DE69619429T2 (de) 2002-10-31
EP0740373B9 (en) 2002-10-16

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