DE2443939A1 - MULTIPLE CONNECTORS - Google Patents

Description

_. , .. Manchan, September 13, 1974

Patent attorney

Dipl.-Ing. G. W. Schmidt My reference: Tomkiewicz

8 Munich 5 Case MX-12

Buttermelcherstraße 19 _,

Molex Incorporated, Lisle, Illinois, V.St.A.

Multiple connector

The invention relates to a multiple connector for electrical assemblies, namely a connector with frictionless pin insertion.

The term "electrical components" includes devices or circuits of all kinds, such as ζ · B. Building units with integrated circuits (large scale integrated circuit packages, also called LSI), structural units with a double row of pins (dual-in-line packages) or other modules or circuits with a Multiple contact pins or springs.

The usual method of connecting electrical components to printed circuit boards is in that you have the protruding connecting wires with conductive parts of the printed circuit soldered. Disadvantages of this method are the cost of soldering and the difficulty of changing the soldered-on components if necessary. This difficulty

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skills become almost insurmountable when using highly developed modern building units such as Units with double rows of pins, such as eight or fourteen pins, or the LSI called structural units, which generally have forty pins or contact springs.

In order to overcome the difficulties that arise when soldering the individual components, were various types of connectors for receiving contact pins or springs have already been developed. Examples such connectors for transistor circuits and assemblies with double rows of pins are found in U.S. Patents 3,516,044 and 3,673,5 ^ 3. Even though these connectors overcome the difficulty of replacing electrical components, but they have a number of other disadvantages. The main difficulty is getting to the end the connection of the contact springs with the connector a relatively large force on the contact springs must exercise.

For example, the LSI components not only contain a large number of contact springs, but these contact springs are also relatively weak because of the miniaturization required and sensitive. If plug pins or the like are used, which are inserted with a certain application of force the total force is very considerable,

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when a large number of pins have to be inserted at the same time. In addition, it happens frequently suggest that the sensitive contact springs are unable to withstand the insertion pressure without bend or otherwise be damaged.

In order to avoid the disadvantages mentioned, multiple connectors with frictionless pin insertion have already been used suggested. An example of this is found in U.S. Patent 3,683,317. These devices however, have a number of disadvantages, for example the lack of a secure mechanical mounting option for the electrical assembly, the relatively large force that is required to after the introduction of the contact springs di.e safe electrical

see the difficulty in achieving connection with them the assembly of the unit due to the fact that the connector is separate, not connected to it Contains housing parts, and the difficulty of loosening the assembled unit for the purpose of Substitution.

The object of the invention is to create a multiple connector suitable for miniaturization with frictionless pin insertion that is easy to use and works reliably, which can be produced easily and cheaply - especially in mass production - and the ones mentioned

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Avoids disadvantages of the known devices. The housing parts, which are movable relative to one another, should be captively connected to one another before the connector is used , and it should be designed ₉ so that a simple and safe detachment of the assembled unit is possible at any time.

The essence of the invention is evident from the following description of an exemplary embodiment with reference to FIG Drawing and from the claims »

Pig, i eats a section along line 1-1 of Fig. 3 by a multiple connector according to the invention, which is connected to a printed circuit Shows connector during assembly of an electrical component «

Pig «, 2 Is © in section like Pig« I ₃ of the connector after Monday © d®? Unit shows »

Pig »3 is © in section along line 3 = 3 of the figure» Ip ifolbel de? Clarity because of sinister details are omitted «,

Pig _o k is a similar Tel cut, the connector after the Monday of the unit © g!

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Pig. 5 is a partial plan view of a connector of FIG. 1.

Fig. 6 is the corresponding view from below,

Figure 7 is an enlarged side view of a contact piece or strip of the connector according to Fig. 1.

Fig. 8 shows the same contact piece in the other side view.

The connector according to the invention shown in the drawing is denoted by the general reference number 10. Its task is to establish releasable electrical connections to an electrical component 12 provided with a plurality of contact springs and at the same time to hold it mechanically, the component 12 being connected to the conductive parts Ik of a printed circuit 16. The electrical component 12 standardized with regard to the size and the arrangement of the contact springs can be, for example, one of the integrated circuits called LSIs with forty contact pins or contact springs 18 which are arranged in two rows. It can of course also be any other arrangement with two rows of contact springs which contains semiconductor components or other parts. Although the connector 10 is connected to a printed circuit 16 in the illustrated embodiment, it may take place

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which may also be connected to any other circuit or device.

The connector 10 includes a housing which is designated by the general reference number 20. It contains a main part 22 with a recess or cavity 2k, and a control slide 26 movable in the vertical direction in the cavity. In Pig. 1, 3, 5 and 6, the control slide is in its outer (upper in the drawing) position relative to the main part of the housing. A safety catch, denoted by the general reference numeral 28 (FIGS. 3 and k) , prevents the control slide from moving beyond the outer position, and thus prevents it from being unintentionally removed or lost. A locking device denoted by the general reference numeral 30 (FIGS. 3 and k) serves to hold the control slide 26 in its inner (lower in the drawing) position after it has been pressed into it.

As a support surface for the electrical assembly 12, the control slide 26 contains an upper surface 32. The main part 22 of the housing has a plurality of recesses 3 ^ for receiving the contact springs the sides of the cavity, the number and arrangement of which corresponds to that of the contact springs 18 of the structural unit 12. When the structural unit is placed on the surface 32 /, the contact springs 18 enter the recesses 3 ^ a.

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The contact springs 18 come into electrical contact with the contact pieces or strips 36, the number of which is equal to that of the contact springs 18 and the recesses 34. Each contact piece 36 contains a spring part 38, which in the normal or relaxed position of the contact piece 36 (Fig. 1) such Assumes a position that the associated contact spring 18 enters the recess 34 unhindered and without friction can be introduced. If then the structural unit 12 together with the control slide 26 from the outer Position of Fig. 1 is pressed into the inner position of Fig. 2, press the control surfaces of the slide 26, the spring parts 38 of the contact pieces firmly against the contact springs 18, on the one hand - a safe electrical Established contact with the contact springs and on the other hand the structural unit 12 secure in its position is held.

After this more or less basic description should refer to the details of the presented Embodiment are received. The main part 22 of the housing is generally rectangular or box-like shape that corresponds to that of the structural unit 12. It contains coherent outer walls, namely, the opposing side walls 42 and the end walls 44. as best seen in Fig. 5, is the cavity 24 for receiving the control slide

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bars 26 are located between the walls 42 and 44. The side walls 42 are connected to one another and stiffened by transverse struts 46 arranged at a distance from one another. The upper edges of the cross struts 46 delimit the cavity 24 downwards. The lower protrusions cause 48 of the transverse struts, that the printed circuit 16 a certain distance from the bottom of the main part 22 of the housing has to allow the exchange of heat and / or hot gases that the during the Verlofcens der'Kontaktstück © J6 conductive parts of the printed circuit can arise, as well as to allow ventilation of the unit during operation. The cross bars 46 are made in one piece with the main part of the housing ο

The Dex ³ control slide 26 corresponds in its "shape to the main part 22" but is smaller than this and fits exactly into the cavity 24 _O It contains the end walls 50 and the side walls 52 o To stiffen the control slide and to ventilate the structural unit 12, the side wall © 52 connected to one another by cross struts 54 arranged at a distance from one another ₉ which are made of one piece ait dan sidewall® !! consist ₀ The outer parts of the side walls contain the support surface 32 for the structural unit 12 _O The end walls 50 are raised in the reference frame 56 (PIg ₀ 3) "in order to protect the structural unit and receive it safely. The tax"

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Areas 40 ″ are on the sides of the walls 52.

As mentioned, the control slide can between. the external position of the pig. 1 and the inner position of Fig. 2 are shifted. The spool 26 and the main part 22 of the housing are separate Parts. After the manufacture of these parts, the control slide 26 is brought over the cavity 24 and after pressed down. Here and during the later movement between the outer and the inner position the slide by two projections 58 (Fig. 5) of its End walls 50 guided, which slide in matching guide slots 6o of the end walls 44 of the main part 22.

When the control slide 26 is inserted into the main part 22 in this way, the safety gear occurs 28 in function, which connects the two parts captive with each other and for the purpose of lighter and more convenient to use. As best seen in Figs. 3 and 4, The safety device 28 contains two hook-shaped fingers 62, which are elastic extensions of two cross struts 48 are and consist of one piece with them. The fingers 62 engage in corresponding holding surfaces 64 of two cross struts 54 of the slide 26. When the slide is first inserted into the cavity 24, the inclined surfaces 66 act on the fingers 62 that these are pushed back. When the slide 26 has reached the outer position, snap

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the pingers on the holding surfaces 64 and prevent an outward movement of the slide, making it captive is held on the main part 22.

This position shown in Pig »1 and 3 is a stable position, ie the slide is not loose so that it can rattle back and forth between the outer and the inner position ₉ but is, as explained below, by frictional engagement in the external position held. In this position, the connector can be kept in stock and are sent, is used until it is for connecting a structural unit, "The locking device 30 includes a pair of resilient, made of one piece with the end walls of the main part kk existing hook 68» Each of the hook has an end surface 70 which slides over the outer surface of the end wall 50 of the slide when the slide is inserted. As can best be seen from FIG. 3, the hooks 68 are elastically bent outwards in the outer position of the slide, so that they hold the slide securely in this position by frictional engagement of their plastic surfaces until it is pressed down. This seemingly minor feature also contributes significantly to the convenient, quick and efficient use of the connector.

If the slide 26 is moved from the outer to the inner position, it is in this position locked by inserting the tips of the hook into the

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surfaces 72 of the walls 50 engage. The top ends of the hooks are gently rounded so that they can easily be pulled off Hand can be pressed outward to pull the slide 26 back. This is made even easier by that the hooks 68 at the ends of the main part 22 are easily accessible.

One of the contact pieces or strips 36 is shown enlarged in FIGS. 7 and 8. It contains a straight push piece 74, which down into a Pin contact 76 expires from the underside of the Main part 22 of the housing protrudes. The pin contact 76 can be made by any of the known soldering methods to an external circuit, for example to the conductive parts 14 of a printed circuit 16 will. The contact piece has at the upper end of the foot piece 74 36 a widened piece 78 (FIG. 8) from which an elastic retaining tongue 80 is pushed out.

The spring part 38 of the contact pin 36 is a substantially U-shaped part of the contact piece. The spring part 38 is laterally offset from the plane of the foot piece 74 by a cross piece 82. The end of the spring part 38 ends in a widened head piece 84 (FIG. 8).

When assembling the connector 10, the contact pieces 36 are only inserted into the main part 22. They are held in place on the one hand by the retaining tongues 80 (FIG. 1), and on the other hand through the crosspiece 82, as best shown in FIG

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- 12 - 2443933

seen ", each of the contact pieces receiving recesses Jk a substantially square cross-section and extends to the upper edge of the main part up" Dia recesses 3 ^ correspond in their number and arrangement of the contact springs 18 of the assembly 12. They have such a large ₉ that it has a Allow free and unimpeded entry of the contact springs into the recesses . Each of the recesses 3 ^ is connected to the cavity 24 by a slot or channel 86 which is somewhat narrower than the recess 3 ^.

When the contact piece is inserted into the main portion 22 36 ,, the pin contact? 6 is introduced into the recess 3 ^ If the downward movement progresses, the widened © piece 78 holds the contact element in the desired position in the recess 3 ^ "The front end _s dLho the pin contact 76, trit't in © inen channel 88 (Pig "1) _s which ¥ on. the recess 3 ^ extends downwards o it abuts against an inclined guide surface 90 _p which guides the pin contact 76 downwards, until it protrudes from the bottom of the main part 22 "When the retaining tongue 80 reaches the bottom of the recess Jh " it will resiliently pressed against the push piece 74 * j until si © springs outwards upon further introduction and rests against the projection 92, which prevents the contact piece from being pulled out. «There are outwardly directed slots 9 ^ vox» -

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seen that allow a pushing back of the retaining tabs, when the contact pins are to be removed again. After full introduction of the contact piece 36 the crosspiece 82 lies against the bottom of the slot 86 in order to allow the contact piece to penetrate too deeply to prevent.

Since the contact springs 18 of the structural unit 12 are present in large numbers and, as a result of the miniaturization, are very small and sensitive, the force required to insert the contact springs must be as low as possible. The contact pieces 36 are therefore designed in such a way that the contact springs 18 can enter the recesses 3 ^ completely unhindered. As best seen in Fig. 1, the spring parts initially lie in the slots 86 and in the cavity 2k. Only the widened head piece Qk lies in the recess 3k, so that the contact springs 18 can easily be inserted between the spring parts 38 and the walls 96.

After the structural unit 12 has been placed on the surfaces in such a way that the contact springs 18 are located in the recesses 3 ^, as shown in FIG. 1, the structural unit 12 and the slide 26 are easily pressed by hand from the outer to the inner position . The side walls 52 of the slide have inclined control surfaces kö of such a length that they cover all of the contact pieces 36. During this movement

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Men the control surfaces 40 with those parts of the contact pieces into engagement g which protrude into the cavity 2 ^, so that the spring parts 38 of the contact pieces are pushed completely into the recesses 3 ^. As a result, be 3B ₉ as best seen the spring Balle from FIG. 2 ^ firmly against the contact springs 18 is pressed, so this spring between the spring members and the walls% is held., Paths through the control surfaces kO caused mechanical translation is this not very high force required, "a good electrical connection is achieved on the same side between each contact spring 18 and the associated contact piece 36. In addition, the structural unit 12 is held securely in place by the tight clamping of the contact springs 18"

It is always possible to make a substitution the unit used is required. In this case it is only necessary to use the two Hook 68 (Fig. 4) that keeps the slider in the inner position hold to push apart. As a result of the resilient design of the contact pieces 36 and their engagement the slide then jumps with the inclined control surfaces 40 26 with the structural unit 12 automatically from the inner position of FIG. 2 into the outer position of FIG. 1. The structural unit 12 can then be easily removed and exchanged for another unit.

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The invention is not limited to the illustrated and described embodiment, but also includes modifications and equivalents that are within the capabilities of a person skilled in the art.

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Claims (10)

September 13, 1974 Claims \ * J Multiple connector for an electrical assembly that contains a plurality of contact pins or springs, with a housing which consists of a main part and a control slide, a plurality of recesses in the main part for receiving the contact pins or springs and a plurality of in The contact pieces or strips arranged in the recesses, which in the relaxed position do not block the recesses and allow a frictionless introduction of the contact pins, characterized in that the in a cavity (24) of the main part (22) of the housing between an outer and an inner one Position displaceable control slide (26) has inclined control surfaces (4o) which press the contact pieces (36) during its movement into the inner position with mechanical translation against the contact springs (18) of the structural unit (12), and that a safety device (28) is provided is through which the spool is connected to the main part in such a way that it cannot be moved beyond the outer position. S09812 / 0844 2. Multiple connector according to claim 1, characterized in that that a locking device (30) between the main part (22) and the control slide (26) is provided which fixes the control slide in the inner position as soon as it is brought into this. 3 · multiple connector according to claim 2, characterized in that the control slide side walls (52) and Includes end walls (50) entering the cavity (24) between the side walls (42) and end walls (44) of the main body engage, the locking device (30) consisting of one piece with the walls of the main part, contains elastic hook parts (68), which in corresponding holding surfaces (72) of the walls of the control slide intervention. 4. Multiple connector according to claim 3 _f, characterized in that two of said hooks (68) and holding surfaces (72) existing locking units are arranged opposite one another on the circumference of the housing. 5. Multiple connector according to claim 1, characterized in that the main part (22), which is opposite, the cavity (24) defining side walls and end walls, two rows of in the side walls (42) contains arranged recesses (34) for receiving the contact springs (18). 50981 2/0844 6. multi-connector according to claim 5 _t characterized in that between each of said cutouts gene (34) and the cavity (24) a slot (86) is provided that each of the spring parts (38) of the contact pieces (36) in the outer position of the control slide partly in the recess (34) and partly in the slot (86), and that the control surfaces (40) of the control slide when it moves into the in the inner position, press the pedals through the slot into the recess. 7. Multiple connector according to claim 6, characterized in that each of the contact pieces (36) has a widened, head piece engaging in the recess (34) (84) which prevents the head piece from entering the slot (86). 8. Multiple connector according to claim 5t, characterized in that a channel (88) extending from the recess (34) to the underside of the main part is provided in the main part, and that each of the contact pieces (36) contains a contact part passing through this channel. 9 · Multiple connector according to claim 8, characterized in, that said contact part is a pin contact (76). 509812/0844 10. Multiple connector according to claim 8, characterized by an elastic retaining tongue (80) of the contact piece (36) and by a projection (92) of the Main part, in which the retaining tongue engages to hold the contact piece in its position. 11 «Multiple connector according to claim 1, characterized in that that the control slide (26) includes raised end walls (at 56), which the limit upper, the structural unit receiving surfaces (32), their height is slightly greater than that of the component. 509812/0844 Blank page