EP0355378A2 - Test clip for SMD circuits and its method of fabrication - Google Patents

Test clip for SMD circuits and its method of fabrication Download PDF

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Publication number
EP0355378A2
EP0355378A2 EP89112907A EP89112907A EP0355378A2 EP 0355378 A2 EP0355378 A2 EP 0355378A2 EP 89112907 A EP89112907 A EP 89112907A EP 89112907 A EP89112907 A EP 89112907A EP 0355378 A2 EP0355378 A2 EP 0355378A2
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EP
European Patent Office
Prior art keywords
test plug
test
contact
channels
wires
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP89112907A
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German (de)
French (fr)
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EP0355378B1 (en
EP0355378A3 (en
Inventor
Horst E. Moll
Carsten Moll
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AP PRODUCTS GmbH
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AP PRODUCTS GmbH
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Publication of EP0355378A2 publication Critical patent/EP0355378A2/en
Publication of EP0355378A3 publication Critical patent/EP0355378A3/en
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Publication of EP0355378B1 publication Critical patent/EP0355378B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/22—End pieces terminating in a spring clip
    • H01R11/24—End pieces terminating in a spring clip with gripping jaws, e.g. crocodile clip

Definitions

  • the invention relates to a test plug, in particular to a clip or clip-like test plug.
  • Test plugs have long been known in the prior art in various variations; they have the task of making or facilitating the temporary connection of circuits of electrical devices with, for example, test or measuring devices. If output pins are present on the devices, then the test plugs can have sockets which are arranged corresponding to the output pins, so that the test plugs can be plugged in in a simple manner. On the other hand, the test plugs must be equipped with pins if the electrical devices have output sockets exhibit. The opposite ends of the plug sockets or plug pins are or are connected to the test leads.
  • SMD surface mounted device.
  • clamp-like test plugs have developed, in which parallel wires are embedded in the test plug, which is made of electrically non-conductive material, and protrude at both ends.
  • the wires on the clamp side of the test plug can be flattened to get a better contact area. It may also be appropriate if the wires on the clip side do not protrude beyond the plug end, but remain embedded in the insulating test plug on the side facing away from the contact.
  • the invention is therefore based on the object of creating a test plug or test clip for circuits in SMD technology, in which the spreading of the jumper wires is possible in a simple and reliable manner.
  • the essential idea of the invention is that channels for the contact wires are preformed in the clamp parts, so that the difficult and problematic insertion of the contact wires, as is customary in the known test plugs, is avoided.
  • the clip parts each consist of two halves, which are manufactured separately and in which corresponding half-channels can then be easily formed so that the channels for the contact wires are formed when the half-shells are joined together.
  • the course of the channels can in principle be arbitrary, but it is advantageous and expedient if the channels run as follows from claim 2 or claim 3, since the contact wires can then be securely inserted into the channels.
  • the contact wires can be of the same length, since they can be driven against a stop when inserted into the channels and cut to the same length at the opposite end.
  • Figures 1 and 2 show two examples of guiding the contact wires of test plugs, in which the distance of the contact wires on the lower side of the plug, i.e. on the side that is to be connected to the circuits to be tested is smaller than on the upper side that is to be connected to the test device.
  • the contact wires 1 (FIG. 1) and 2 (FIG. 2) are recognizably of different lengths and in both cases have two kinks, which make mechanical insertion into the insulating body 3 or 4 practically impossible.
  • the contact wires must first be sorted by length, then in the correct order on the e.g. Insulating body made of plastic are placed and fixed in this arrangement so that they can not move in the subsequent pouring in the plastic body, otherwise they could lead to short circuits.
  • test clips In the examples of FIGS. 1 and 2, it is left open whether it is a one-piece test plug or are test clips since the difficulties set out above occur equally in both embodiments. With the test clips, however, the problems are doubled since they each consist of two identical parts of the components shown in FIGS. 1 and 2.
  • the test clips have two rows of contact wires in order to detect the lines on both sides of the circuit boards. 1 and 2, 5 and 6 indicate that the ends of the contact wires 1 and 2 can also be designed as plug pins of a test plug.
  • FIG. 3 now shows a front view of a test clip 7 according to the invention, which initially does not appear to differ from the test plug described in FIG. 1.
  • the features according to the invention can only be clearly recognized when the test clip production process is described with reference to FIGS. 5-7.
  • Fig. 4 shows first the clip-like structure of the test clip 7 with the two similar parts 8 and 9.
  • the latter are articulated to each other via the lugs 10 and 11 and the joint plate 12 (Fig. 5) and are so by the coil spring 13 at the upper end pressed apart that the lower ends 14 and 15 abut each other.
  • two or more spiral springs 13 can also be provided.
  • FIG. 5 shows that the two clip parts 8 and 9 each consist of two half-shells 17 and 18 or 19 and 20, which are produced separately and later connected to one another, as will be explained.
  • the sectional drawing in FIG. 8 shows that the half-shells 17... 20 have corresponding half-channels 21 and 22 that run according to the guidance of the contact wires 16 in the clip parts 8 and 9.
  • These half shells 17 ... 20 are very easy to manufacture, e.g. pour in appropriate shapes.
  • the parts of the test clip 7 shown in FIG. 5 are manufactured individually, the contact wires 23 being of the same length.
  • the plastic half shells 17 and 18 or 19 and 20, in which the Manufacture the half channels 21 and 22 are formed, are then connected to each other.
  • the half-shell 17 extends over the half-shell 18 in a lid-like manner on the long sides. This results in a better connection surface than if the two half-shells butt together.
  • the connection is then made by ultrasonic welding, which is indicated by the weld seams 24 and 25.
  • the joining of the two parts 17 and 18 creates the longitudinal channels 26, which, as can be seen from FIGS. 3 and 6, run.
  • the clear width of the channels 26 is practically no greater than the diameter of the contact wires 23. Therefore, the contact wires of the same length are mechanically driven into the channels 26 and in the process necessarily and correctly follow the bends of these channels. Because of this type of introduction of the contact wires 23 into the channels 26, no further fastening of the contact wires in the channels is necessary, since on the one hand a spring force is built up by bending the wires, which alone would prevent the contact wires from slipping. On the other hand, the static friction between the contact wires 23 and the channels 26 also supports the fixed holding of the contact wires.
  • FIG. 6 shows a top view of one half of the test clip 7 produced in this way.
  • the lower ends 28 of the contact wires 23 can be subsequently flattened on one or both sides in order to obtain a better contact area.
  • FIG. 3a clearly shows that between them the webs 30 are present, which ensures a better clamping on the circuit boards.

Abstract

The invention relates to a clip-type or clamp-type test plug for occasionally electrically connecting the contacts of a circuit board to test or measuring equipment. In this, the contact wires are guided in the plug in such a way that the distance of the contact wires at the clamp-side end is lower than at the opposite end. In this way it is then also possible to test circuit boards with very thick conductor tracks. The contact wires are guided in the test plug in channels which are formed during the manufacture of the test plug. <IMAGE>

Description

Die Erfindung bezieht sich auf einen Prüfstecker, insbesondere auf einen clip- oder klammerartigen Prüfstecker.The invention relates to a test plug, in particular to a clip or clip-like test plug.

Prüfstecker sind im Stand der Technik in vielfältigen Variationen seit langem bekannt; sie haben die Auf­gabe, die temporäre Verbindung von Schaltungen elek­trischer Geräte mit z.B. Prüf- oder Meßeinrichtungen herzustellen bzw. zu erleichtern. Sind an den Geräten Ausgangsstifte vorhanden, dann können die Prüfstecker Buchsen aufweisen, die entsprechend den Ausgangs­stiften angeordnet sind, so daß die Prüfstecker in einfacher Weise aufgesteckt werden können. Anderer­seits müssen die Prüfstecker mit Stiften ausgerüstet sein, wenn die elektrischen Geräte Ausgangsbuchsen aufweisen. Die entgegengesetzten Enden der Stecker­buchsen bzw. Steckerstifte sind bzw. werden mit den Prüfleitungen verbunden.Test plugs have long been known in the prior art in various variations; they have the task of making or facilitating the temporary connection of circuits of electrical devices with, for example, test or measuring devices. If output pins are present on the devices, then the test plugs can have sockets which are arranged corresponding to the output pins, so that the test plugs can be plugged in in a simple manner. On the other hand, the test plugs must be equipped with pins if the electrical devices have output sockets exhibit. The opposite ends of the plug sockets or plug pins are or are connected to the test leads.

Eine besondere Art von Prüfsteckern ist erforderlich, wenn die elektrischen Schaltungen keine Ausgangs­buchsen oder Ausgangsstifte aufweisen, sondern wenn die Ausgangsleitungen in sogenannter SMD-Technik vorliegen (SMD = surface mounted device). Hier haben sich klammerartige Prüfstecker herausgebildet, bei denen in dem aus elektrisch nichtleitendem Material bestehenden Prüfstecker parallele Drähte eingebettet sind, die an beiden Enden herausragen. Dabei können die Drähte an der Klammerseite des Prüfsteckers abgeflacht sein, um eine bessere Kontaktfläche zu bekommen. Auch ist es unter Umständen zweckmäßig, wenn die klammerseitigen Drähte nicht über das Stek­kerende hinausragen, sondern auf der kontaktabge­wendeten Seite in dem isolierenden Prüfstecker einge­bettet bleiben.A special type of test plug is required if the electrical circuits have no output sockets or output pins, but if the output lines are in so-called SMD technology (SMD = surface mounted device). Here, clamp-like test plugs have developed, in which parallel wires are embedded in the test plug, which is made of electrically non-conductive material, and protrude at both ends. The wires on the clamp side of the test plug can be flattened to get a better contact area. It may also be appropriate if the wires on the clip side do not protrude beyond the plug end, but remain embedded in the insulating test plug on the side facing away from the contact.

Ein Problem entsteht aber nun, wenn die Ausgangslei­tungen der elektrischen Schaltungen immer näher aneinander rücken, was z.B. bei IC's und Chips der Fall ist, und damit das Anschließen von Prüfleitungen immer schwieriger, wenn nicht sogar unmöglich wird. Man ist daher dazu übergegangen, die Steckerdrähte an der Ausgangsseite so weit zu spreizen, daß eine Verbindung mit den Prüfleitungen möglich ist. Dieses Spreizen bedeutet aber einen erheblichen herstellungs­technischen Aufwand, da die Drähte unterschiedlich lang sind und auch sicher in der gespreizten Stellung in dem Stecker gehalten werden müssen. Man hat daher auch schon versucht, dieses Problem dadurch zu mil­dern, daß die Drähte zunächst in dem Stecker parallel geführt und dann auf einer relativ kurzen Strecke gespreizt werden, um sie dann wieder parallel an den Steckerausgang zu führen. Im fertigen Zustand hat man zwar einen stabilen Stecker, doch sind je Draht zwei Abknickstellen vorhanden, die das maschi­nelle Legen der Drähte praktisch ausschließen. Außer­dem sind die Knickstellen äußerst empfindlich gegen Abbrechen während des Legevorganges.A problem arises, however, when the output lines of the electrical circuits move closer together, which is the case with ICs and chips, for example, and the connection of test lines becomes increasingly difficult, if not impossible. It has therefore started to spread the connector wires on the output side so far that a Connection with the test leads is possible. However, this spreading means a considerable manufacturing outlay, since the wires are of different lengths and must also be held securely in the spread position in the plug. Attempts have therefore already been made to alleviate this problem by first routing the wires in parallel in the plug and then spreading them over a relatively short distance in order to then lead them back in parallel to the plug output. In the finished state you have a stable connector, but there are two kinks per wire, which practically exclude the mechanical laying of the wires. In addition, the kinks are extremely sensitive to breaking off during the laying process.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Prüfstecker bzw. Testclip für Schaltungen in SMD-Technik zu schaffen, bei dem die Spreizung der Schaltdrähte in einfacher und sicherer Weise möglich ist.The invention is therefore based on the object of creating a test plug or test clip for circuits in SMD technology, in which the spreading of the jumper wires is possible in a simple and reliable manner.

Die Erfindung ergibt sich aus dem Anspruch 1.The invention results from claim 1.

Der wesentliche Gedanke der Erfindung besteht darin, daß in den Klammerteilen Kanäle für die Kontaktdrähte vorgeformt werden, so daß das schwierige und problem­behaftete Einlegen der Kontaktdrähte, wie bei den bekannten Prüfsteckern üblich, vermieden wird.The essential idea of the invention is that channels for the contact wires are preformed in the clamp parts, so that the difficult and problematic insertion of the contact wires, as is customary in the known test plugs, is avoided.

Dabei ist es zweckmäßig, wenn die Klammerteile jeweils aus zwei Hälften bestehen, die getrennt hergestellt werden und in denen dann auf einfache Weise entspre­chende Halbkanäle geformt werden können, so daß beim Zusammenfügen der Halbschalen die Kanäle für die Kontaktdrähte entstehen.It is useful if the clip parts each consist of two halves, which are manufactured separately and in which corresponding half-channels can then be easily formed so that the channels for the contact wires are formed when the half-shells are joined together.

Der Verlauf der Kanäle kann im Prinzip beliebig sein, doch ist es vorteilhaft und zweckmäßig, wenn die Kanäle so verlaufen, wie es sich aus dem Anspruch 2 bzw. dem Anspruch 3 ergibt, da dann die Kontaktdrähte sicher in die Kanäle eingesteckt werden können.The course of the channels can in principle be arbitrary, but it is advantageous and expedient if the channels run as follows from claim 2 or claim 3, since the contact wires can then be securely inserted into the channels.

Ein weiterer großer Vorteil des neuen Prüfsteckers besteht nun darin, daß die Kontaktdrähte gleich lang sein können, da man sie beim Einstecken in die Kanäle gegen einen Anschlag treiben und am ent­gegengesetzten Ende auf gleiche Länge abschneiden kann.Another great advantage of the new test plug is that the contact wires can be of the same length, since they can be driven against a stop when inserted into the channels and cut to the same length at the opposite end.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus den Patentansprüchen und der folgenden Beschreibung.Further features and advantages of the invention emerge from the patent claims and the following description.

Es zeigen

  • Fig. 1 einen bekannten Testclip mit unterschiedlichem Kontaktabstand an den beiden Enden;
  • Fig. 2 einen anderen Testclip dieser Art;
  • Fig. 3 einen Testclip gemäß der Erfindung;
  • Fig. 4 eine Seitenansicht des Testclips der Fig. 3;
  • Fig. 5 eine Explosionsdarstellung des Testclips der Fig. 3;
  • Fig. 6 eine andere Ausbildungsform des Testclips gemäß der Erfindung;
  • Fig. 7 den Schnitt A/A der Fig. 3;
  • Fig. 8 den Schnitt B/B der Fig. 7.
Show it
  • 1 shows a known test clip with different contact spacing at the two ends;
  • 2 shows another test clip of this type;
  • 3 shows a test clip according to the invention;
  • Fig. 4 is a side view of the test clip of Fig. 3;
  • Fig. 5 is an exploded view of the test clip of Fig. 3;
  • 6 shows another embodiment of the test clip according to the invention;
  • Fig. 7 shows the section A / A of Fig. 3;
  • 8 shows section B / B of FIG. 7.

Die Figuren 1 und 2 zeigen zwei Beispiele für die Führung der Kontaktdrähte von Prüfsteckern, bei denen der Abstand der Kontaktdrähte an der unteren Seite des Steckers, d.h. an der Seite, die mit den zu prüfenden Schaltungen verbunden werden soll, kleiner ist als an der oberen Seite, die mit dem Prüfgerät verbunden werden soll. Die Kontaktdrähte 1 (Fig. 1) und 2 (Fig. 2) sind erkennbar unterschied­lich lang und weisen in beiden Fällen zwei Knick­stellen auf, die eine maschinelle Einbringung in den Isolierkörper 3 bzw. 4 praktisch unmöglich machen. Die Kontaktdrähte müssen nämlich zunächst nach Länge sortiert, dann in der richtigen Reihenfolge auf den z.B. aus Kunststoff bestehenden Isolierkörper gelegt und in dieser Anordnung fixiert werden, damit sie sich nicht beim anschließenden Vergießen in dem Kunststoffkörper verschieben können, da sie anderenfalls zu Kurzschlüssen führen könnten. Ferner besteht - sowohl beim maschinellen als auch beim manuellen - Sortieren und Einlegen der Drähte die Gefahr, daß sie an den Knickstellen abbrechen. Man könnte nun die Knickstellen vermeiden, indem man die Drähte entsprechend biegt; aber das Sortieren und das fixierte Einlegen derartiger Drähte wäre so schwierig, daß diese Methode ausscheiden muß.Figures 1 and 2 show two examples of guiding the contact wires of test plugs, in which the distance of the contact wires on the lower side of the plug, i.e. on the side that is to be connected to the circuits to be tested is smaller than on the upper side that is to be connected to the test device. The contact wires 1 (FIG. 1) and 2 (FIG. 2) are recognizably of different lengths and in both cases have two kinks, which make mechanical insertion into the insulating body 3 or 4 practically impossible. The contact wires must first be sorted by length, then in the correct order on the e.g. Insulating body made of plastic are placed and fixed in this arrangement so that they can not move in the subsequent pouring in the plastic body, otherwise they could lead to short circuits. There is also the risk - both in the machine and in the manual - of sorting and inserting the wires that they break off at the kinks. You could now avoid the kinks by bending the wires accordingly; but the sorting and the fixed insertion of such wires would be so difficult that this method has to be eliminated.

Bei den Beispielen der Fig. 1 und Fig. 2 ist offen­gelassen, ob es sich um einteilige Prüfstecker oder um Prüfclips handelt, da die vorstehend dargelegten Schwierigkeiten bei beiden Ausführungsformen gleicher­maßen auftreten. Bei den Prüfclips verdoppeln sich allerdings die Probleme, da diese jeweils aus zwei gleichartigen Teilen der in den Fig. 1 und 2 gezeigten Bauteilen bestehen. Bei den Testclips hat man nämlich zwei Reihen von Kontaktdrähten, um die auf beiden Seiten der Schaltungsplatinen liegenden Leitungen zu erfassen. In den Fig. 1 und 2 ist mit 5 bzw. 6 angedeutet, daß die Enden der Kontaktdrähte 1 bzw. 2 auch als Steckerstifte eines Prüfsteckers ausgebildet sein können.In the examples of FIGS. 1 and 2, it is left open whether it is a one-piece test plug or are test clips since the difficulties set out above occur equally in both embodiments. With the test clips, however, the problems are doubled since they each consist of two identical parts of the components shown in FIGS. 1 and 2. The test clips have two rows of contact wires in order to detect the lines on both sides of the circuit boards. 1 and 2, 5 and 6 indicate that the ends of the contact wires 1 and 2 can also be designed as plug pins of a test plug.

Fig. 3 zeigt nun in Vorderansicht einen Testclip 7 gemäß der Erfindung, der sich zunächst nicht von dem beschriebenen Prüfstecker der Fig. 1 zu unter­scheiden scheint. Die erfindungsgemäßen Merkmale werden auch erst bei der Beschreibung des Herstel­lungsverfahrens der Testclips anhand der Fig. 5-­7 eindeutig erkennbar.3 now shows a front view of a test clip 7 according to the invention, which initially does not appear to differ from the test plug described in FIG. 1. The features according to the invention can only be clearly recognized when the test clip production process is described with reference to FIGS. 5-7.

Fig. 4 zeigt zunächst den klammerartigen Aufbau des Testclips 7 mit den beiden gleichartigen Teilen 8 und 9. Letztere sind über die Ansätze 10 und 11 sowie die Gelenkscheibe 12 (Fig. 5) miteinander gelenkig verbunden und werden durch die Spiralfeder 13 am oberen Ende so auseinandergedrückt, daß die unteren Enden 14 und 15 aneinander anliegen. Je nach der Breite des Testclips, d.h. nach der Anzahl der Kontaktdrähte, können auch zwei oder mehr Spiral­federn 13 vorgesehen werden. Außerdem kann es für manche Anwendungsfälle zweckmäßig sein, die Gelenk­scheibe 12 wegzulassen und die beiden Teile 8 und 9 direkt über die Ansatzstücke 10 und 11 miteinander zu verbinden.Fig. 4 shows first the clip-like structure of the test clip 7 with the two similar parts 8 and 9. The latter are articulated to each other via the lugs 10 and 11 and the joint plate 12 (Fig. 5) and are so by the coil spring 13 at the upper end pressed apart that the lower ends 14 and 15 abut each other. Depending on the width of the test clip, ie on the number of contact wires, two or more spiral springs 13 can also be provided. In addition, it may be expedient for some applications to omit the joint disk 12 and to connect the two parts 8 and 9 directly to one another via the end pieces 10 and 11.

Die Explosionszeichnung der Fig. 5 zeigt, daß die beiden Clipsteile 8 und 9 jeweils aus zwei Halbschalen 17 und 18 bzw. 19 und 20 bestehen, die getrennt hergestellt und später miteinander verbunden werden, wie noch erläutert wird. Die Schnittzeichnung der Fig. 8 zeigt, daß die Halbschalen 17 ... 20 mitein­ander korrespondierende Halbkanäle 21 und 22 auf­weisen, die entsprechend der Führung der Kontaktdrähte 16 in den Clipsteilen 8 und 9 verlaufen. Diese Halb­schalen 17 ... 20 lassen sich sehr einfach herstellen, z.B. in entsprechenden Formen gießen.5 shows that the two clip parts 8 and 9 each consist of two half-shells 17 and 18 or 19 and 20, which are produced separately and later connected to one another, as will be explained. The sectional drawing in FIG. 8 shows that the half-shells 17... 20 have corresponding half-channels 21 and 22 that run according to the guidance of the contact wires 16 in the clip parts 8 and 9. These half shells 17 ... 20 are very easy to manufacture, e.g. pour in appropriate shapes.

Die Herstellung des neuen Testclips erfolgt nun auf folgende Weise:The new test clip is now produced in the following way:

Die aus der Fig. 5 ersichtlichen Teile des Testclips 7 werden einzeln hergestellt, wobei die Kontaktdrähte 23 gleich lang sind. Die aus Kunststoff bestehenden Halbschalen 17 und 18 bzw. 19 und 20, in denen beim Herstellen die Halbkanäle 21 und 22 ausgebildet werden, werden sodann miteinander verbunden. Wie Fig. 7 zeigt, greift die Halbschale 17 an den Längs­seiten über die Halbschale 18 deckelartig hinweg. Damit ergibt sich eine bessere Verbindungsfläche als bei stumpfem Aneinanderstoßen der beiden Halb­schalen. Die Verbindung erfolgt dann durch Ultra­schallverschweißen, was mit den Schweißnähten 24 und 25 angedeutet ist. Durch das Zusammenfügen der beiden Teile 17 und 18 entstehen die Längskanäle 26, die wie aus Fig. 3 bzw. 6 ersichtlich ist, ver­laufen.The parts of the test clip 7 shown in FIG. 5 are manufactured individually, the contact wires 23 being of the same length. The plastic half shells 17 and 18 or 19 and 20, in which the Manufacture the half channels 21 and 22 are formed, are then connected to each other. As shown in FIG. 7, the half-shell 17 extends over the half-shell 18 in a lid-like manner on the long sides. This results in a better connection surface than if the two half-shells butt together. The connection is then made by ultrasonic welding, which is indicated by the weld seams 24 and 25. The joining of the two parts 17 and 18 creates the longitudinal channels 26, which, as can be seen from FIGS. 3 and 6, run.

Die lichte Weite der Kanäle 26 ist praktisch nicht größer als der Durchmesser der Kontaktdrähte 23. Daher werden die gleich langen Kontaktdrähte maschi­nell in die Kanäle 26 hineingetrieben und folgen dabei zwangsweise und einwandfrei den Biegungen dieser Kanäle. Wegen dieser Art der Einbringung der Kontaktdrähte 23 in die Kanäle 26 ist keine weitere Befestigung der Kontaktdrähte in den Kanälen erforderlich, da sich einerseits durch das Biegen der Drähte eine Federkraft aufbaut, die schon allein ein Verrutschen der Kontaktdrähte verhindern würde. Andererseits unterstützt aber noch die Haftreibung zwischen den Kontaktdrähten 23 und den Kanälen 26 die feste Halterung der Kontaktdrähte.The clear width of the channels 26 is practically no greater than the diameter of the contact wires 23. Therefore, the contact wires of the same length are mechanically driven into the channels 26 and in the process necessarily and correctly follow the bends of these channels. Because of this type of introduction of the contact wires 23 into the channels 26, no further fastening of the contact wires in the channels is necessary, since on the one hand a spring force is built up by bending the wires, which alone would prevent the contact wires from slipping. On the other hand, the static friction between the contact wires 23 and the channels 26 also supports the fixed holding of the contact wires.

Am unteren Ende der Clipshälfte 17, 18 bzw. 19, 20 befindet sich eine Anstoßfläche 27 (Fig. 6), gegen die die Kontaktdrähte 23 anstoßen, so daß sie hier gleich lang aus der Clipshälfte herausragen. Die an der entgegengesetzten Seite ungleich lang herausragenden Kontaktdrähte 23 werden auf gleiche Länge abgeschnitten, nachdem sie durch Wärmeeinwirkung fest in die Längskanäle 26 eingebettet wurden.At the lower end of the clip half 17, 18 or 19, 20 there is an abutment surface 27 (FIG. 6) against which the contact wires 23 abut, so that they protrude from the clip half here for the same length. The contact wires 23 projecting on the opposite side of different lengths are cut to the same length after they have been firmly embedded in the longitudinal channels 26 by the action of heat.

Fig. 6 zeigt in Draufsicht eine so hergestellte Hälfte des Testclips 7. Die unteren Enden 28 der Kontaktdrähte 23 können ein- oder beidseitig noch nachträglich flachgedrückt werden, um so eine bessere Kontaktfläche zu erhalten.6 shows a top view of one half of the test clip 7 produced in this way. The lower ends 28 of the contact wires 23 can be subsequently flattened on one or both sides in order to obtain a better contact area.

Die Fig. 3, 4 und 3a zeigen nun noch eine besondere Ausbildung am unteren Ende 29 des Testclips 7. Wie die Fig. 3 zeigt, schließen die Kontaktdrähte 23 zwar mit dem Kunststoffkörper ab, doch zeigt die Fig. 3a deutlich, daß zwischen Ihnen die Stege 30 vorhanden sind, wodurch ein besseres Festklemmen an den Schaltungsplatinen gewährleistet ist.3, 4 and 3a now show a special design at the lower end 29 of the test clip 7. As shown in FIG. 3, the contact wires 23 close with the plastic body, but FIG. 3a clearly shows that between them the webs 30 are present, which ensures a better clamping on the circuit boards.

Claims (8)

1. Clip oder klammerartiger Prüfstecker zum zeitweisen elektrischen Verbinden der Kontakte einer in SMD-­Technik bestückten Leiterplatte (IC, Chip) mit Prüf- und Meßgeräten oder dgl., mit einer Vielzahl von in dem Prüfstecker eingebetteten Verbindungs­leitungen, wobei der Abstand der Leiterenden an der Kontaktseite (Leiterplattenseite) geringer ist als der Abstand der entgegengesetzten Leiterenden (Anschlußenden), dadurch gekennzeichnet, daß in dem Prüfstecker von der Anschlußseite zur Leiter­plattenseite in einer Ebene nebeneinander verlaufende Kanäle (26) vorgesehen sind, in welche die Leiter oder Kontaktdrähte (16) nachträglich einführbar sind.1. Clip or clamp-like test plug for temporarily electrical connection of the contacts of a printed circuit board (IC, chip) equipped with SMD technology with test and measuring devices or the like, with a plurality of connecting lines embedded in the test plug, the distance between the conductor ends at the Contact side (printed circuit board side) is less than the distance between the opposite conductor ends (connection ends), characterized in that channels (26) are provided in the test plug from the connection side to the printed circuit board side in one plane, into which the conductors or contact wires (16) subsequently can be introduced. 2. Prüfstecker nach Anspruch 1, dadurch gekennzeichnet, daß die Kanäle (26) von beiden Enden des Prüfsteckers her zunächst gerade verlaufen und die Geradteile zur Anpassung an den verschiedenen Leiterabstand an der Kontakt- und an der Anschlußseite durch Kanalteile mit zwei gegenläufigen Biegungen verbunden sind.2. Test plug according to claim 1, characterized in that the channels (26) from both ends of the test plug initially run straight and the straight parts are adapted to adapt to the different conductor spacing on the contact and on the connection side by channel parts with two opposite bends . 3. Prüfstecker nach Anspruch 2, dadurch gekennzeichnet, daß die Geradstrecke von der Anschlußseite bis zur ersten Biegung wesentlich größer ist als die Geradstrecke von der zweiten Biegung bis zur Kontakt­seite.3. Test plug according to claim 2, characterized in that the straight section from the connection side to the first bend is substantially larger than the straight section from the second bend to the contact side. 4. Prüfstecker nach Anspruch 1, dadurch gekennzeichnet, daß jeder der beiden Klammersteile (8, 9) aus zwei Halbschalen (17, 18; 19, 20) zusammengesetzt ist und jede Halbschale einen Halbkanal (21, 22) für die Kontaktdrähte (16) aufweist.4. Test plug according to claim 1, characterized in that each of the two clamp parts (8, 9) is composed of two half-shells (17, 18; 19, 20) and each half-shell has a half-channel (21, 22) for the contact wires (16) having. 5. Prüfstecker nach Anspruch 1 und 2, dadurch gekenn­zeichnet, daß die beiden Halbschalen (17, 18; 19, 20) ultraschallverschweißt sind.5. Test plug according to claim 1 and 2, characterized in that the two half-shells (17, 18; 19, 20) are ultrasonically welded. 6. Prüfstecker nach Anspruch 3, dadurch gekennzeichnet, daß die eine Halbschale (17; 19) klappkappenartig über die andere Halbschale (18; 20) greift.6. Test plug according to claim 3, characterized in that one half-shell (17; 19) engages like a hinged cap over the other half-shell (18; 20). 7. Prüfstecker nach Anspruch 1-4, dadurch gekennzeich­net, daß die kontaktseitigen Enden (29) der Halb­schalen so ausgebildet sind, daß die Drahtenden (28) frei liegen, und daß zwischen den Drähten (23) gleich lange Stege (30) der Halbschalten vor­handen sind.7. Test plug according to claim 1-4, characterized in that the contact-side ends (29) of the half-shells are designed so that the wire ends (28) are exposed, and that between the wires (23) webs (30) of the same length of the half-shifts available. 8. Verfahren zur Herstellung eines Prüfsteckers gemäß Anspruch 1-4, dadurch gekennzeichnet, daß für jeden Klammerteil zwei Halbschalen aus Kunststoff mit kongruent verlaufenden Halbkanälen für die Kontakt­drähte geformt werden, daß die Halbschalen sodann durch Ultraschweißen fest miteinander und die beiden Klammerteile federnd miteinander verbunden werden, daß anschließend die Kontaktdrähte in die Kanäle der Klammerteile gegen einen Anschlag eingeführt und am oberen Ende auf gleiche Länge geschnitten werden.8. A method for producing a test plug according to claims 1-4, characterized in that for each clamp part two half shells made of plastic with congruent half channels for the contact wires are formed, that the half shells are then firmly connected to each other by ultrasonic welding and the two clamp parts are resiliently connected to each other that the contact wires are then inserted into the channels of the clamp parts against a stop and cut to the same length at the upper end.
EP89112907A 1988-08-19 1989-07-13 Test clip for SMD circuits and its method of fabrication Expired - Lifetime EP0355378B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3828148A DE3828148A1 (en) 1988-08-19 1988-08-19 CLIP OR CLAMP-LIKE TEST PLUG AND METHOD FOR PRODUCING SUCH A TEST PLUG
DE3828148 1988-08-19

Publications (3)

Publication Number Publication Date
EP0355378A2 true EP0355378A2 (en) 1990-02-28
EP0355378A3 EP0355378A3 (en) 1991-03-20
EP0355378B1 EP0355378B1 (en) 1996-03-13

Family

ID=6361164

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89112907A Expired - Lifetime EP0355378B1 (en) 1988-08-19 1989-07-13 Test clip for SMD circuits and its method of fabrication

Country Status (5)

Country Link
EP (1) EP0355378B1 (en)
AT (1) ATE135498T1 (en)
DE (2) DE3828148A1 (en)
ES (1) ES2084589T3 (en)
GR (1) GR3019319T3 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19703897C1 (en) * 1997-02-03 1998-07-02 Herbert Amrhein Terminal device for providing releasable electrical connection e.g. for testing SMD components
DE29803900U1 (en) * 1998-03-05 1999-04-01 Pm Dm Gmbh Contact terminal for contacting electrical lines using mutually insulated contacts
DE19827045A1 (en) * 1998-06-18 2000-01-05 Dbb Fuel Cell Engines Gmbh Device for voltage measurement
EP2555330A1 (en) * 2010-04-02 2013-02-06 Shanghai Guangwei Electric&tools Co., Ltd. High conductive energy-saving clip

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19528011A1 (en) * 1995-07-31 1997-02-06 Kontron Elektronik Adapter with a carrier having a contacting device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3506949A (en) * 1967-12-29 1970-04-14 John T Venaleck Electrical connector clip device
US4618208A (en) * 1985-05-16 1986-10-21 Nikko Kogyo Kabushiki Kaisha Circuit test clip

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8124768U1 (en) * 1982-02-11 Standard Elektrik Lorenz Ag, 7000 Stuttgart Test clamp for integrated circuits
US3899239A (en) * 1974-06-24 1975-08-12 Us Navy Integrated circuit test clamp
DD120307A1 (en) * 1975-07-07 1976-06-05
DE2537325C3 (en) * 1975-08-21 1979-08-23 Continental Specialties Corp., New Haven, Conn. (V.St.A.) Terminal for the connection of contacts of an electrical component with a test or measuring device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3506949A (en) * 1967-12-29 1970-04-14 John T Venaleck Electrical connector clip device
US4618208A (en) * 1985-05-16 1986-10-21 Nikko Kogyo Kabushiki Kaisha Circuit test clip

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19703897C1 (en) * 1997-02-03 1998-07-02 Herbert Amrhein Terminal device for providing releasable electrical connection e.g. for testing SMD components
DE29803900U1 (en) * 1998-03-05 1999-04-01 Pm Dm Gmbh Contact terminal for contacting electrical lines using mutually insulated contacts
DE19827045A1 (en) * 1998-06-18 2000-01-05 Dbb Fuel Cell Engines Gmbh Device for voltage measurement
EP2555330A1 (en) * 2010-04-02 2013-02-06 Shanghai Guangwei Electric&tools Co., Ltd. High conductive energy-saving clip
EP2555330A4 (en) * 2010-04-02 2013-08-14 Shanghai Guangwei Electric & Tools Co Ltd High conductive energy-saving clip

Also Published As

Publication number Publication date
DE3828148C2 (en) 1990-05-31
ATE135498T1 (en) 1996-03-15
EP0355378B1 (en) 1996-03-13
GR3019319T3 (en) 1996-06-30
ES2084589T3 (en) 1996-05-16
DE58909623D1 (en) 1996-04-18
EP0355378A3 (en) 1991-03-20
DE3828148A1 (en) 1990-02-22

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