DE1928775A1 - Detachable electrical plug connection - Google Patents

Description

IBM Germany Internationale Büro-Matchinen Geseihehaft mbH

Boeblingen, June 4, 1969 at-hn

Applicant: International Business Machines

Corporation, Armonk, N.Y. 10,504

Official file number: New registration

Applicant's file number: Docket EN 9-68-010 Detachable electrical connector

This invention relates to a releasable electrical connector between connecting elements protruding from a surface and fork-shaped Contact springs which are inserted into elongated cavities of an insulating connector housing, the plug side of which is adapted to the connection elements Has openings which allow the connection elements to enter the gap formed by the legs of the contact springs,

Such plug connections are expediently in data processing Machines or in other circuit systems and control devices the electronic circuit arrangements produced using miniaturization or microtechnology used in large numbers, e.g. to connect adjacent circuit boards or similar,

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These electronic circuit arrangements contain switchboards as a carrier for the circuit cards on which the electronic components are arranged. In addition to being used as a carrier, these circuit boards also serve as Distribution and connection point for the power or voltage supply and the various signal lines, these switchboards that mostly come with printed lines are provided and which also have electrically conductive intermediate layers can contain, have on their connection side a large number, mostly close to one another, arranged in rows Terminal pins that can have a circular, rectangular or other cross-section. The electrical coupling of the switchboards with each other or the connection of these switchboards to the voltage or power supply lines and the signal lines, mostly to others Lead switchboards or assemblies of the circuit arrangement takes place Expediently detachable plug connections in order to facilitate troubleshooting and the replacement of defective components in the event of a malfunction or to be able to make any changes in the circuit arrangement at any time. .. "._"

_{It is known that multipolar coupling plugs ver 7} are used in low-voltage technology for the detachable connection of cables or multi-core lines. Multipole miniature plugs or couplings with good transmission properties are also already in use in circuit arrangements that are implemented using Mima.t.urtpchnik. These multi-pole coupling plugs allow a line connection but only in one

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predetermined scheme and restrict the freedom of movement of the freely selectable Connection on a control panel.

By the laid-open specification 14 65 238 a method and a device for making a releasable electrical connection with a terminal pin was known, which is used, for example, for making releasable connections between selected connection pins on a circuit board which carries numerous grid-like connection pins. In this known connection device, an elongated plug housing made of insulating plastic is used, which at its front end has a channel-shaped opening which is adapted to the cross section of a connection pin and which is connected to a cavity corresponding to the remaining length of the plug housing The selected point is placed on the switchboard, with the connection pin protruding through the channel-shaped inlet opening of the connector housing into its cavity the plug housing is inserted into the cavity conductor is firmly connected by a crimp or strangulation compound, wherein the tip of the * ^ & ÄnscnlüßsUftfes dehVus the two legs of the contact spring gebildetemSpalteingreift ^ ühti this ¹ was spread on c t. In the inserted state. "-The chlußstift -siCzfdie -KöntaRtfe'der on the ^ Ä ^ ^r Splrexiung of the legs has 'ZU-r Φόϊ§ ($ ρ"&<£&>*,';

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firstly the two contact points between the legs of the contact spring and the terminal pin are exposed to contact pressure and, secondly, that the two legs on the side walls of the cavity in the connector housing are pressed, whereby a tensioning effect is achieved and an unintentional loosening of the connector housing and the fork-shaped contact spring is avoided. In the event of a deliberate loosening of such a connection is due to a low tensile force that overcomes the tension forces caused by the expansion, the contact spring and the connector housing can be removed from the connector pin again.

The cavity of the connector housing is provided with guide strips and is designed in such a way that two contacts freeze on one pin at the same time can be put on, which then lie with their backs against one another in the cavity. This known connection has the advantage that tilting of the fork-shaped contact spring and the connector housing by ribs in the Cavity and by other constructive measures is avoided.

According to the Offerfegungs script 14 65 238, the connector housing with two continuous cavities are formed, so that there is a double connection point in which two connecting pins in the connector housing enter. However, this extended embodiment requires that the connection pins are precisely arranged on the control panel and that the mean distance between the connection pins is closely tolerated.

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This known connector mentioned above has the disadvantage that when making a connection, first open the connector housing the switchboard is to be set, and that the contact springs connected to the cables are then pushed into the connector housing. This type of connection can easily lead to incorrect switching, especially if a larger number of connections are to be established, this is also Connection awkward. Another disadvantage is that the legs of the Contact spring in its width and also the cavity in the. Connector housing must be manufactured very precisely in order to achieve the required clamping force between contact spring and connector housing or do the contact springs to be able to push onto the connection pins without using too much force.

In the extended embodiment, the two or more connection points may have, there is the disadvantage that this is not polarized, and that when two or more pins are connected, the The risk of confusing the same increases.

In the circuit arrangements for data processing stops that are in Miniature or micro technology, very fast signals with low voltage levels are used. This requires that the lines and the connection or terminal contact points for the signals and the voltage or power supply have very good transmission properties must have, impedance-adjusted, decoupled from each other

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and are as shielded as possible and that they also have the smallest dimensions exhibit. To avoid disturbances caused by potential shifts between a Signal line and a ground point to avoid and meet the The aforementioned requirements are parallel to the Siga. ! conductors to ground potential arranged lying ladder. Coaxial cables are best suited for this in terms of their transmission properties, but theirs are Dimensions are often too big. Instead, ribbon cables are used with a signal conductor between one or two ground conductors is embedded. On the circuit boards or circuit cards Therefore, in addition to the connection points for the signals, connection elements at ground potential are also present. They are solvable Plug couplings known, in each of which a signal-carrying plug pin is arranged in a chamber that is at ground potential, In addition, control panels are pins with rows of connectors known in which one or more connecting pins in the row are at ground potential.

These known electrical and detachable connectors meet in technically and economically unsatisfactory the Requirements related to the connection of the conductors of a cable to an in

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Micro or miniature te chnik executed circuit arrangement can be made.

The invention is based on the object of a new, detachable electrical

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To create connection of electrical conductors with the connecting elements arranged in rows on a circuit board, the good electrical transmission properties has th, light and in the smallest dimensions can be produced as an economical mass product that the connector is polarized and easily detachable and that it in particular the Meets requirements that are made in micro- or miniature technology Circuit elements are provided.

Connection elements This object is achieved according to the invention in that the connection pins and at least one contact rail arranged parallel to it are provided that the connector housing has at least one opening which the cross-sectional area of a connection pin is adapted and that the The connector housing has at least one incision extending over the entire width of the connector housing for receiving a contact rail.

This he inventive detachable connector between single or Multiple lines and those on a switchboard, circuit board or the like arranged connection elements, z. B. pins and contact rails contains a plug part, which consists of an insulating plastic housing, in the two channel-shaped cavities in each case one or two fork-shaped contact springs can be used optionally, one of which End is firmly connected to the lines to be connected by a choke connection. This completed connector housing is used for production

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a releasable contact connection on a pin and the leg a contact rail set.

It is understandable that the connector housing also has several cavities can be produced so that several connection pins or legs of Contacts can be inserted.

It is a feature of this new electrical detachable connector that that they address the issues that arise in printed circuit technology is adapted and that they meet the associated requirements for contact security Fulfills. This plug connection according to the invention enables in particular the reliable detachable and polarized contact connection of the Conductors of multiple flat cables, three-core coupling cables or of Coaxial cables with connection points randomly distributed on a switchboard. In addition, this new connector is very affordable. It is a further advantage that the conductors of the cables to be connected are equipped at the ends with the fork-shaped contact springs that Engage self-locking in recesses in the connector housing and thus prevent accidental loosening. Another major benefit is that the connector according to the invention through an opening adapted to the cross section of a connecting pin and through ^ len incision for the Reception of the contact bar is polarized, i.e. that the connection of the Plug connection is not interchangeable, whereby faulty circuit connections and malfunctions are reduced.

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The connector housing of the electrical connection connector, for example two adjacent cavities contains / was known in a Injection molding process made from an insulating thermoplastic material. The lower end of the one channel-shaped cavity has an opening which corresponds to the cross section of the connecting pins is adapted and the entry of a connector pin in the connector housing and allows the gap between the two legs of the contact spring with spreading of the same, while the lower end of the other channel-shaped cavity has an incision for receiving of the leg of a contact rail is used. The fork-shaped contact springs keep themselves self-locking in the connector housing, in the front one Nose-shaped lugs on the outer edges of the fork legs engage in recesses provided at the lower end of the connector housing. The inner sides of the two legs of each contact spring are designed in such a way at the front and their distance from one another is adapted so that they are inserted in the State through the connecting elements protruding into the gap a reliable spreading contact with the connecting pin or the contact rail serve as a control panel. If a completed connector is connected to a Circuit board is attached, is a contact spring with a pin and the other contact spring is connected to a contact rail. Since the lines that are connected to the contact springs, the Establish a connection with the contact rails, preferably on

Iviassepotential lie and the lines that carry signals to the Contact springs are connected, which with the connecting pins a connection

Making manure is a good transfer property even for fast and steep signals, as well as decoupling ai adjacent lines and a shielding effect against interference is given.

The connector according to the invention is described in more detail below using an exemplary embodiment of the invention with reference to drawings. They represent:

Fig. 1: a perspective view of a section of the detachable

electrical connector between cables and a printed circuit board with two contact rails of different Height is equipped,

Fig. 2: a longitudinal section through a plug connection according to the invention. The longitudinal section shows the contact connection between the two fork-shaped contact springs and the connecting pin or the contact rail of a switchboard,

Fig. 3: a plan view of a completed connector housing, in

the two fork-shaped ones lying next to each other on one side of the housing Contact springs are inserted,

Fig. 4: also a plan view of a completed connector housing, in which alternatively two pairs of fork-shaped

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Contact springs are inserted, which are opposite to each other in pairs,

Fig. 5: a longitudinal section through a plug connection along the

Line 5-5 of Fig. 2. This longitudinal section shows the connector in the side view. _a

Fig. 1 shows a detachable electrical plug connection according to the invention for a control panel 10, only partially shown in FIG is and in the row, a number of connecting pins 11 are arranged are. Between the individual rows of the connection pins 11 are, as shown, also the two contact rails 12 and 13 on the Surface of the control panel 10 arranged.

The releasable electrical plug connection according to the invention is used primarily for connecting the individual conductors of a cable with the connection pins a control panel 10 and it includes the connector pin 11 to be connected and one of the contact rails 12 or 13. By the Plug part, the pins 11 are mainly connected to the signal or voltage or power supply lines and the contact rails 12 and 13, which serve as a general mass, with the

Earth or shield lines in the connection cable. The drive in a Sptizgußver Housing made of thermoplastic, insulating plastic 14 of the plug part contains two inside in the longitudinal direction through the

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Housing extending channel-shaped cavities 15 and 16. The lower "end of the cavity 16 in the connector housing 14 goes into a rectangular, centrally arranged channel 17, which is provided as an inlet opening of a connecting pin 11 and the lower end of the cavity 15 has an incision 18, into which a shank when the plug is attached

engages in angle of the contact rail 12 or 13. During this example as Entry opening for a connecting pin 11, preferably a rectangular cross-section for the channel 17, can also be selected in the case of a rectangular one Cross-section of the pin 11 at the end of a circular or oval Cross section of the channel 17 are used, or it is also possible to use the Terminal pins 11, instead of a rectangular one, also have a different cross-section.

The upper ends of the two cavities 15 and 16 in the connector housing 14 are designed to accommodate a pair of fork-shaped contact springs 20 are suitable, which are connected to the conductor ends of an electrical cable 21 to be connected. Those in the two cavities 15 and 16 inserted fork-shaped contact springs 20 are then in one level next to each other. The plug part contains a locking device ^, which causes the inserted into the connector housing 14 fork-shaped contact springs 20 get caught in this, as a result of which the contact springs can no longer fall out of the connector housing 14. These self-locking locking is achieved in that the plug

in case 14 outlet Stanchions 22 are provided, the hook-shaped approaches

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20a protrude, which the fork-shaped contact springs 20 at the front of their Show prongs on the outside. With the fork-shaped contact springs 20, the distance between the inner, opposite sides 20b of the two fork prongs is chosen so that they can be reached by the insertion of a connecting pin 11, or a contact rail 12, 13 are spread apart, whereby a contact point is formed. Is the completed connector part placed on a control panel 10, then inevitably a connection pin, which protrudes through the inlet opening 17, with the contact spring 20 in the cavity 16 connected, and one leg of a contact rail 12, 13 protrudes into the incision 18 and makes contact with the contact spring 20 in the cavity 15 of the connector housing 14.

From Fig. 1 it can be seen that the contact bars 12 and 13 which are at ground potential with respect to the surface of the control panel 10 are a have different leg heights. Because of this, the distance between the underside of the connector housing 14 and the surface of the Control panel 10 depending on the leg height of the contact chi ene 12, 13. This distance between the underside of the connector housing and the surface the control panel 10 is provided that a pin 11 additional line connections 24 go out, which by a winding or Würg connection or by a clamping or fusion connection with the Terminal pin 11 are connected in contact with each other.

According to the respective requirements, they are at ground potential

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lying contact chieneη 12, 13, which have only one contact leg, predominantly between two adjacent rows of connecting pins 11 arranged, or there are U-shaped contact rails 12, 13 are used, which are arranged on the control panel 10 as shown in FIG are that a row of connecting pins 11 is assigned to each contact leg. The U-shaped contact rails 12, 13 with two legs have the advantage that on two at the same height opposite connection pins 11 each connector can be placed without a mutual Disability occurs. Another advantage is that the U-shaped contact rails 12, 13 each only between two double rows of Ansdi lussstifte 11 are to be attached. This plug-in connection according to the invention thus creates through the use of contact rails 12, 13 and the completed plug parts the possibility that the individual lines a multi-core cable can be connected at any point on the control panel 10 and that, as was customary up to now, the connection points on the Control panel 10 no longer have to be in a row. Of course, it is also possible with the plug connection according to the invention, a Make single or multiple wire connections from one panel to another, or detachable wiring on a panel 10 run.

When he inventive detachable electrical plug connection are the fork-shaped contact springs 20 can be connected in different variations, z. B '. a two-wire connection is possible, which can also be asymmetrically

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is feasible, with a signal conductor to which with a pin 11 in contact connected contact spring 20 leads and a ground or earth conductor via the other contact spring 20 with a contact rail 12, 13 electrically is conductively connected. There is also the connection of a three-wire cable possible, in which the middle line 25 serves as a signal line which is connected to the contact spring 20, which makes contact with a connecting pin 11 produces, while the two outer lines 21, which are at ground potential, are connected to the contact spring 20, the has contact with a contact rail 12, 13 connection. In this three-core cable, the two outer conductors 21 are used for decoupling and as a shield; to increase their effectiveness, they should be in their Diameter be slightly larger than the diameter of the signal line 25. Likewise, the connection of coaxial cables is possible, in which the inner conductor serves as a signal conductor and is surrounded concentrically by insulation, which in turn is encased by a sheathed conductor, which is predominantly is at earth potential. In the coaxial cable, too, the inner conductor is connected to the contact spring 20, which in terms of contact with a Terminal pin 11 is connected and the outer sheath of the coaxial cable is connected to the contact spring 20, which is in the plugged-in state with a contact rail 12, 13 has connection. The connector according to the invention gives together with the coaxial cable or the above mentioned three-core cable a transmission line with good, satisfactory Properties.

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From Figs. 1 and 2 it can be seen that they with the fork-shaped contact springs 20 line ends 21 to be connected are each connected by double clamping points 26, 27. These clamping points 26, 27 are designed as choking or crushing points, the first clamping point 26 only encompassing the conductor cross-section and the second clamping point 27 the conductor and the surrounding insulation material. Through this double Clamped connection, strain relief and good contact security are achieved. The contact springs 20 point according to FIG. 2 after the clamping points 26, 27 for the ladder 21 a flat, elongated and fork-shaped Part on, from the front end of which a 'slot extends inward in the axial direction, the width and thickness of which is a connecting pin 11 corresponds. The two legs of the fork-shaped contact springs 20 are provided at the front with inwardly directed lugs 20b towards the slot 18, so that the gap 18 at this point is somewhat narrower than the strength of a Terminal pin 11. When putting on the plug part are through the penetrating pin 11, the two legs of the fork-shaped contact springs 20 spread open, whereby a pressure contact results, since the inwardly directed nose-shaped lugs 20b with bias the side wall of the connection pin 11 rest. Due to the pressing force of the two on ge spread legs upon penetration of the connection pin 11 contact cleaning is also achieved.

Fig. 3 shows a top view of a completed Sfeck part, in the two cavities 15, 16 lying next to each other in each case a contact

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spring 20 is used with connected conductors. The two cavities 15 and 16 in the connector housing 14 are designed and their cross-section at the upper end is so large that two pairs of fork-shaped Contact springs 20 can be inserted. These four fork-shaped contact springs 20 then lie side by side in pairs, as shown in FIG. 4, and two with their backs in each cavity 15, 16 to each other.

Fig. 5 shows a side view of the longitudinal section through a Komplefc oriented connector housing 14 along the line 5-5 of FIG. 2. From this A sectional view is an arrangement of a fork-shaped contact spring 20 in Cavity 16 of the connector housing 14 can be seen and how the leg this contact spring 20 rests against an inserted connecting pin 11 or on the leg of a contact rail 12, 13 and thus the contact-wise Establishes connection. In addition, this representation shows the

a

management guide and the two terminal points 26, 27. While in the illustration Fig. 5 only a fork-shaped contact spring 20 in one Cavity 15, 16 is used, can be seen from the illustration that in the cavity 15, 16 of the connector housing 14 still has enough space for each a second fork-shaped contact spring 20 is present, which insert it into the cavity 15, 16 before fitting the plug part is that the backs of both contact springs 20 lie against one another.

This connector according to the invention of this example is preferred

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wisely used where electrical panels 10 need to be electrically coupled to one another are. In this application, the three-wire connecting cables are fitted with the contact springs 20 on both ends and with a connector housing 14 completed. These completed plugs are the on the corresponding connection pins 11 and the contact bars .12, 13 of the switchboards to be coupled are placed, with a transmission line results in which the signal conductor 25 lies between two outer conductors 21 at ground potential. Since in a cavity 15, 16 in Connector housing 14 two contact springs 20 can be used, it is possible to use this connector as a branching point at the same time.

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Claims (8)

PATENT CLAIMS Detachable electrical plug connection between one surface outstanding connection elements and fork-shaped contact springs, which are inserted into elongated cavities of an insulating connector housing are, the plug-in side has the connecting elements adapted openings that allow an entry of the connecting elements into the enable gap formed from the legs of the squared springs, characterized in that pins are used as connecting elements (11) and at least one contact rail (12, 13) arranged parallel thereto are provided that the connector housing (14) at least has an opening (17) which is the cross-sectional area of a terminal pin is adapted, and that the connector housing at least one extending over the entire width of the connector housing Has incision (18) for receiving a contact rail. 2. Plug connection according to claim 1, characterized in that the Contact rails (12, 13) have a U-shaped profile and that they are attached to the surface of a control panel (10) between two rows of pins (11) that the legs, the serve as contact legs, have the same direction as the connecting pins. 90988 1/0 974 3. Plug connection according to claim 1, characterized in that im Plug housing (14) the isolated cavities (15, 16) lying next to one another have such dimensions that in each cavity optionally one or two fork-shaped contact springs (20) can be used with their flat rear sides lying against one another. 4. Plug connection according to one of claims 1 or 3, characterized in that that the contact springs (20) have a connection part which has at least one pair of conductor connection points (26, 27), and that the legs of the contact springs are provided with outwardly projecting nose-shaped lugs (20a) which are in the Engage the connector housing (14) provided recesses (22). 5. Plug connection according to one of claims 1 to 4, characterized in that the plug-in side of the plug housing (14) has a the inner edges of the incision opening (18) terminating approach which the channel-shaped entry opening (17) for at least contains a connecting pin (11) and that this inlet opening is funnel-shaped on the front side. 6. Plug connection according to one of claims 1, Z or 5, characterized in that the connecting pins (11) and the inlet openings (17) in the connector housing (14) have a rectangular cross-section. 9098 8 1/0974 7. Plug connection according to one of claims 1 to 6, characterized in that that when connecting a coaxial cable or a multi-core signal conductor (25) surrounded by outer conductors (21) the Connect the outer conductor to the line connection (26, 27) of the contact spring (20) connected to a contact bar (12, 13) are connected and the signal conductor or conductors with the connection points (26, 27) of the with a connection pin (11) in connection Contact springs. 8. Plug connection according to one of claims 1, 3 or 7, characterized in that the line connection points (25, 26) as gag connections are executed. 909881/0974 Blank page