DE2231388A1 - DEVICE FOR ESTABLISHING ELECTRICAL CONNECTIONS AND CHANGEOVERS - Google Patents

Description

PATEMTANWALi WPL-ING.

HELMUT GORTZ

6 Frankfurt am Main 70 2231388

Schnedc-nhoWr. 27-Τ · Ι.61 7079 ** ^{fc W}

June 23, 1972 Gzy / Ra.

Etablissements Pissis-Sauvadet, Paris / France

Device for making electrical connections and switching

The invention relates to devices for the production of electrical Connections and switchings, a method of making of parts of such devices and contact means and Control rails for these devices.

In particular, it relates to a device of this type, which on the one hand contact means, which each have at least a first and a second metal strip arranged at a distance from one another, which form a spring causing the contact at their ends, a hollowed metal part or a socket _s an electrical insulation at least between the first and second metal strips and the socket, contain at least a first, a wide and a third terminal in electrical communication with the first metal strip and with the second metal strip and with the socket, respectively. On the other hand, these devices contain an elongated control rail provided with through openings, which is arranged on an insulating material in such a way that its openings are in the extension of the metal strips opposite the intermediate frame between the metal strips. Here, the sockets are designed so that they can be inserted into the openings of the control rail, and the metal strips and the sockets are designed and arranged so that they can be fitted with contact plugs

309833/0303

cooperate to produce an electrical connection or switching can be introduced into each socket.

These contact plugs can be designed in the manner of the so-called ¹¹ flehre de jack ". The plugs are connected to at least a first, a second and a third electrical line in such a way that electrical connections are made when the plug is inserted into the socket are between the first, second and third line on the one hand and the first or the second or the third connection terminal on the other hand.

In the known devices for making electrical connections and switchings, the metal strips and the isolating means held in place on a metal grid. In such known devices are the mounting and dismounting of the metal strips and the insulation difficult and require a long time.

The object of the invention is to avoid these difficulties, and in particular an apparatus for producing to create electrical connections and unicircuits in which each contact means can be easily replaced. Another object of the invention is such a device which, together with printed circuit boards and their terminals can be used in a simple and economical manner can. Another object of the invention is a method of making such devices that is economical and is simple and in particular inner surfaces of the sockets

309833/0303

results that are solid and have exact dimensions «

The device according to the invention is characterized in that each contact means contains connecting components which the individual elements of each contact means in certain

Holds positions in relation to the other firmly together. Each of the individual elements of the contact means preferably has one flat surface, and the connecting components are arranged so that between them alternate in a stacked form flat metallic and electrically insulating surfaces are in contact with one another. The connecting components preferably consist of two rigid plates with means which compress the surfaces between them.

In a preferred embodiment of the invention, the Hegelschiene has an interruption on part of the length of the openings passing through the rule rail divides the Hegel rail in its thickness into two parts, the rule rail on the other hand containing means which the edges the interruption so press against each other that the sockets held rail without deformation in the openings of the rule will.

This interruption is advantageously on each of the longitudinal sides usually rail closed. The pressure means of the control rail preferably consist of screws and nuts, with the nuts are in a rigid support plate for the standard rail and these are located on the outer surface of the

309833/0303

Rail to be arranged rigid support plate provided with threads Lucher has.

In a particularly advantageous embodiment of the invention, the terminals have the shape of perpendicular to a outer surface of the llegelechiene running tips. The device here contains the parts of the contact means protective carrier plate, which consists of an insulating material and contains holes arranged in a grid-like manner are arranged that the tips of the terminals after insertion into the holes at certain distances from each other and are held by the contact means »This protective carrier plate advantageously covers at least part of the outer surface of the control rail and contains additional holes to accommodate the screws,

In another embodiment of the invention, in particular For the production of switchings, the contact plugs are designed in the manner of push buttons, with means for retaining the plugs are provided in the sockets

The method of making a socket for such a device is characterized in that its inner surface is produced by cold drawing.

Further objects, features and advantages of the invention will become apparent from the following description together with the drawings emerged.

309833/0303

Show it:

Fig. I shows a part, partly in section, of an inventive Contraption,

Fig. 2 is a side view, partly in section, of a device according to Fig. i,

3 shows the flat plate for holding the parts of the contact means together,

H shows the method according to the invention for producing a socket for a device according to FIGS. 1 and 2,

5 schematically shows another embodiment of the invention, wherein the contact means is connected to a push button. ".

A device according to the invention according to FIGS. 1 and 2 contains Contact means 1 and 2 and a control rail 3 with continuous cylindrical openings 4,

Each of the contact means contains a Baehse 5 »which consists of a metallic hollow cylinder which is inserted into the openings k of the control rail 3. Each of the contact mat! also contains at least two metal strips 6 and 7 (for contact 1) and 6a and 7a (for contact 2) * The two metal strips of each contact are spaced apart and run practically parallel to the axis of the socket 3 «each contact

303833/0303

includes, according to Fig. 2, a first connection terminal 9 and a second Terminal 10 in electrical contact with the strip 6 (or 6a) or with the strip 7 (or 7a) on the one hand and on the other hand with a third connection terminal 38 (or 38a) in electrical connection with the socket 5.

The parts of the contact 1 and 2 can cooperate with one Plug 8, in such a way that when the plug is inserted into the corresponding contact (2 according to FIG. 1) electrical Connections are made between on the one hand the first, the second and the third terminal and on the other hand first, second and third leads, not shown, connected to the plug.

The plug 8 contains three conductive areas separated from one another along its length. These three areas are electrically isolated from one another. The outer area h1 is connected to the first line, the middle area 42 to the second line and the area 43 "which can come into contact with the inner surface of the socket 5> is connected to a third line.

When the plug 8 is inserted into the contact means 2, the outer part of the strip 6a comes into contact with the area 41 of the plug 8, the outer part of the strip 7a comes into contact with the area 42, and the area 43 comes into contact with the inner one Surface of the socket 5. These contacts enable the electrical connection between the lines connected to the plug and the terminals of the contact.

0 9 8 3 2/0303

To make these connections, the outer parts are the Strips 6 and 7 (and 6a and 7a) double and bent in such a way that they form projections 39 and 40 which protrude against the interior of the Interspace, which separates the strips from each other. ' The strips 6 and 7 form springs in this way, which Press each projection against the corresponding area of the plug 6. The projections 39 and 40 are not opposite each other, but are shifted in the longitudinal direction of the strips 6 and 7 against each other. This should make the cantilever 39 come into contact with the area 41 of the plug 8, and the projection 40 should come into contact with the central area 42 of the plug.

According to the invention, each contact means contains a means for connecting and holding together its elements. These connecting means hold the individual parts of the contact tightly together connected, namely in certain positions opposite one another, so that each contact means is a coherent unit forms that can be easily handled by itself.

Each of the components contains a flat strip. The totality this strip is arranged parallel to one another, with alternating metal strips and insulating strips in this stack Stripes one after the other. The connecting means are two rigid plates 26 and 2? Between which the stack of strips is held, and the whole thing is held together by nuts and bolts.

309833/0303

A first component of the contact 1 is the socket 5 »socket 5 is extended by an arm 19ι which consists of two parts. The first part of the arm 19 extends the bushing 5 in the form of a flat strip and 7 separates "the level of the part 20 extends substantially perpendicular to the planes of the strips 6 and 7. r ^ second part 21 of the Arne 19 extended dea first part 20 and likewise has the form of a flat strip. Further components of the contact medium 1 are the strips 6 and 7. Each of these strips has an extension 22 or 23 in the form of flat strips. The strip 21 runs parallel to the strips 22 and 23 and between them.

The strips 21 and 22 are separated from one another by an insulating strip 2h , which is shown in two parts in the drawing. Likewise, the strips 21 and 23 are separated from one another by an insulating strip 25, which in the example is also shown in two parts. The entirety of the strips 22, 24, 21, 25 and 23 is pressed together between the two rigid plates 26 and 27. These two rigid plates 26 and 27 are preferably made of metal. In this latter case, an insulating strip 26 separates the plate 26 from the strip 22 and an insulating strip 29 separates the strip 23 from the plate 27. Screws 30 and 31, which are all strips between the plates 26 and 27, are used for holding and pressing together stick together.

309033/0303

In the illustrated embodiment, the plate 27 includes bores for receiving the heads of the screws, and the plate 26 contains threads that form the nuts for screws and 31. When passing the screws through the As a whole of the strips, it is necessary to provide insulating sleeves 32 and 33 around the screws, thus through them no short circuits between the strips 21, 22 and 23 arise.

The contact means 2 contains the same elements as the contact means 1, namely the socket 5a, the strips 6a and 7a, their planar extending strips 21a, 22a and 23a. This Contact means 2 also contains additional metal strips 17 and 18. These strips 17 and 18 are shown in FIG Embodiment flat and arranged between the strips 6a and 7a. The strip 17 is in contact with the strip 7a, when the plug 8 is not depressed, and when the plug 8 is not depressed, the strip 18 is in contact with the strip 6a. These contacts are broken when the plug 8 is pushed in, the strip 6a of removed from strip 18 and strip 7a from strip 17a will. The strips 17 and 18 are in electrical communication with a fourth terminal 11 and a fifth, respectively Terminal 12, these terminals 11 and 12 being shown in FIG. 2 with dashed lines. This arrangement the parts of the contact 2 thus allows a short circuit of the terminals 9 and 12 and a short circuit of the terminals 10 and 11 when the plug 8 is not pushed in, and an interruption this short circuit when the plug is pushed in.

309833/0303

- ίο -

In the following, the contact 2 is referred to as "means with double contact".

As in the case of contact 1, the plates and the metallic strips of contact 2 are separated from one another by insulating strips. The following elements are thus found in contact 2 in sequence: a rigid plate 26a, an insulating strip 28a, the extension 22a of the strip 6a, an insulating strip 34, the metal strip 18, an insulating strip 35, the metal strip 21a, an insulating strip 36, the metal strip 17 _} an insulating strip 37 »the strip 23a, the insulating strip 29a and the rigid plate 27a.

The insulating strips are advantageously made of bakelised cardboard. In the form shown, the strips have between plates 26 and 27 all have the same rectangular shape and dimensions as plates 26 and 27. The plates and the strips are preferably larger, as FIG. 2 shows, than the metallic strips 6 and 7 in that plane where these latter have a double curvature to achieve a spring effect.

In the contact 1, the insulating strips 24 and 25 have a significantly greater length than the plates 26 and 27. Also in the Contact 2, the insulating strips 35 and 36 have a clear greater length than plates 26a and 27a. With this embodiment, the insulation between the metallic

309833/0303

Ii -

Stripes improved "

Compared to the known devices allow the connecting Means according to the invention are to easily install and / or expand a means for connecting or switching. Be it also noted that the individual parts of the Eontaktes 2 essentially contain the same elements as contact 1. This makes it possible to produce contacts 1 and contacts 2 in series.

To the terminals 9, OK, 11, 12 and 38 with terminals a printed circuit too. connect these terminals 9, 10, 11, 12 and 38 through the tips 13, 14, 15, 16 · or 38b extended. The connections of a printed on a board Circuitry consist of openings into which these tips can be inserted.

The terminals and tips form lateral extensions of stacked strips. The tip 13 forms a lateral extension of the strip 22, the tip 14 a lateral extension of the strip 23 and the tips 15, and 38b lateral extensions of the strips 17, 18 and 21a, respectively. It should be noted that the tips 13, 14, 15 and 16 are in the Height of the rigid plates 26 and 27 are located, while the tip 38b is displaced with respect to these plates.

With the help of this arrangement, the terminals can be over extend a greater area than if they were longitudinal extensions of the strips, i.e. if they were

309833/0303

Projections of the ends 17a (Fig. 2) formed *

An advantageous embodiment according to the invention is intended below the control rail 3 are described.

Here, the control rail 3 has a recess 44 which covers the plane between the axes of the cylindrical openings 4 according to FIGS. 1 and 2 and which extends over the entire length of the control rail 3. This interruption is preferably closed on the longitudinal sides of the control rail. It can be seen in FIG. 1 that this interruption on the longitudinal side 45 is closed. . The slot 44 extends only over part of the length of the openings 4 of the sockets. In the embodiment shown, the interruption kk is open in the lateral direction where the contact means are located. This interruption allows the bushings 5 to be easily inserted into the openings 4, where they are held together by the pressure means. These pressure means consist, for example, of screws and nuts. For this purpose, cylindrical holes 47 run through the interruption perpendicular to their edges, the holes 47 being arranged at regular intervals along the length of the interruption between the holes 4. The holes hy allow the insertion of screws 46 which engage threads 48 in a rigid carrier plate 49. This carrier plate 49 (FIG. 2) has the shape of an "L", is rigid and covers a large part of the outer surface of the control rail 31, preferably that of its surface of the control rail which is on the same side.

309833/0303

finds how the tips of the terminals. This carrier plate 49 is preferably made of metal and is intended to prevent the control rail 3 is deformed, which in turn is usually made of a plastic by injection molding. This Plastic is preferably a polyamide, in particular what is called "nylon".

The part 49b that is perpendicular to the outer surface of the rule rail runs with the profile 49 makes it possible to attach another part, for example a frame. Because the interruption 44 is open along the entire length of the standard rail 3, except at the longitudinal edges, such as the longitudinal edge 45, the screws 46, which serve as connecting means, and their threads in the plates 49 can hold all the bushings 5, in particular those sockets 5 »which are connected to the Longitudinal edges of the standard rail 3 are located.

The depth of the interruption 44 must be chosen so that the Bushings can be properly held in place, with this compressing must not be too strong, so as not to deform the inner surface of the bushings, and not too weak, to hold the sockets in place.

The device according to the invention also includes a protective one Carrier plate 50 made of an insulating material, which is described in Pig. 2 is shown in section and in plan view in FIG see is. This plate contains holes 51, 52 and 53 arranged in a grid-like manner. These holes 5i, 52 and 53 are intended to be the tips 13, 15 or 38b, which extend the terminals

30 98 33/0303

gladly. The plate 50 may be made of an insulating material such as packaged cardboard and serves a variety of purposes Purposes. First, it ensures a precise position of the tips of the terminals with respect to one another. Second, it enables it to keep these peaks in the same plane. Third, it prevents the solder from flowing against the strips of the Contact, since the tips 13, 14, 15, 16 and 38b are in the corresponding holes in a printed circuit are located. Such a flow of solder would create a short circuit between effect the metal strip of the contact.

The plate 50 advantageously covers the rigid support plate 49 and contains additional holes 54 arranged in a grid, which the tips of the screws 46 can receive. This arrangement also helps to keep the individual elements in in a fixed position opposite each other, and opposite the tips of the terminals. The plate 50 should preferably be relatively rigid and thin.

Two further arrangements will be described below, which according to the invention are particularly advantageous improve the contact means 1 and 2.

The first of these arrangements is that at contact 2 the additional terminals 11 and 12 are short-circuited are with the connection terminals 10 or 9, if the plug 8 is not pushed in «This arrangement consists in that the strips 22a and 23a receive such a bend before their installation that these strips 22a and 23a a good

309833/0303

Exercise spring action on the ends of the strips 17 and 18.

The ends of the strips 17 and 18 contain projections 55 or 56, which can come into contact with the projections 57 and 58 on strips 23a and B2a, respectively. »This bend is with dashed lines for the strip 22a in FIG. 1 shown. This makes it possible that a strong contact pressure of the projection 58 is exerted on the projection 56, and that at the same time the strip 23a presses the projection 57 firmly onto the projection 55. This bend of the strip 22a becomes carried out before the assembly of the elements of the contact between the projection 58 and the point where this Strip 22a is pressed against the insulating strip. In a particularly interesting embodiment, the Bending carried out so that the compressive force for the contact is 110 g, and wherein the strips 6a and 7a of cold-worked German silver exist.

The second of these embodiments relates to a method for forming the inner surface of the socket 5 * This surface must be particularly resistant, since it must take up the area 43 of the plug many times by friction. This method is shown in Fig. H. The method is used in particular with bushes 5 made of first quality brass. The method is that the inner surface 59 of the socket is formed by cold drawing. This pulling takes place by means of a ball 60, for example from a ball bearing, or generally by means of a piece with dimensions that correspond to the dimensions of the inner diameter of the

309833/0303

Correspond to socket 5. The ball 60 is pushed into the interior of the socket with the aid of a screw jack 6i. Before has the inner diameter of the socket is preferably slightly smaller than the desired final diameter. Here the inner surface 59 of the bush 5 is machined in the cold and has a maximum hardness and a high accuracy of the inner diameter 55. This accuracy goes up to 2/100 of a millimeter.

This inventive method for finishing the surface 59 is better than the known methods in which the surface was produced by boring. The method is also economical because the openings k are usually produced by deep drawing. So you can use the same device for manufacturing and finishing.

Fig. 5 shows schematically another embodiment of the invention. Here, the buttons 62 are designed in the manner of snaps and are accommodated in the sockets, not shown, instead of the replaceable plugs. A button 62 can be designed so that a sustained force must be applied to maintain it in the depressed position. The button can also be designed in such a way that it is fixed by itself in the depressed position. Such a button 62 can also cooperate with a single contact 1 and with a double contact 2. The button can have the same structure as a plug or a different structure, such as the plug.

309833/0303

education it shows. In the illustrated embodiment, there is the button 62 made of an insulating material. But it can also be made of a conductive material and cause it this is a short circuit between the strips.

FIG. 5 also shows another embodiment of a he- inventive double contact. Here have the metal strips 6b and 7h have the same length and the projections 39h and 40b face each other. The additional metal strips 17b and 18b are located outside of the intermediate space between the metal strips 6b and 7b. If in this embodiment the push button or the stopper is not pressed in, the metal strips 6b and ISb stand as well as the strips 7h and 17b not in electrical contact with each other, and when the button 62 is pressed in, a short circuit of two of these strips occurs.

The device according to the invention can be used for many purposes. For example, compounds may be mentioned here and handover of telephone lines. Such a device can also be used wherever there is electrical wiring should be switched frequently. The invention is particularly applicable to circuitry printed on a board.

In addition to the advantages mentioned, it should be mentioned that the inventive Devices are relatively small in size, they are easy to maintain because each contact means is interchangeable, and finally, manufacture

309833/0303

is simple and economical.

The invention is also applicable, for example, in cases where the plug has more than three contact areas. In these In some cases, the contacts themselves each contain more than two spring-shaped strips.

309833/0303

Claims (16)

- 19 patent claims Device for making electrical connections and switchings, on the one hand Konaktmittel, which respectively at least a first and. a second, at a distance spaced apart metal strips at their ends form a spring causing the contact, a hollowed metal part or a socket, an electrical insulation at least between the first and second metal strips and the socket, at least a first, a second and a third terminal in electrical connection with the first metal strip or with the second metal strip or with the socket, and on the other hand an elongated, Ilegel rail provided with through openings, which is arranged on an insulating material in such a way that that their openings are in the extension of the metal strips opposite the spaces between the metal strips are located, the sockets are adapted to be inserted into the openings of the control rail can, and wherein the metal strips and the sockets are so formed and are arranged to cooperate with contact plugs for making an electrical connection or switching can be introduced into each socket, characterized in that they each contact means Contains connecting components that oppose the individual elements of each contact means in certain positions brings the other tightly together. 309833/0303 2. Apparatus according to claim i, characterized in that the individual elements have flat surfaces, and that they are arranged so that between them are stacked Form are alternately touching flat metallic and electrically insulating surfaces. 3. Apparatus according to claim 2, characterized in that the connecting components are two rigid plates and have means which interpose those between them Press surfaces together. 4. Device according to one of claims 1 to 3 »characterized in that that the control rail has an interruption on part of the length of the control rail Through openings divides the control rail in its thickness into two parts, and that the control rail pressure medium contains, which press the edges of the interruption against each other in such a way that that the sockets are held in the openings of the control rail without deformation. 5. Apparatus according to claim h, characterized in that the pressure means consist of screws and nuts, the nuts are in a rigid support plate for the control rail, and this to be arranged on the outer surface of the control rail rigid support plate with thread., Has holes provided . 309833/0303 6. Apparatus according to claim k or 5, characterized in that it has means for closing the interruption on the longitudinal sides of the control rail. 7. Device according to one of claims 1 to 6, characterized in that the terminals by perpendicular to an outer surface of the rule rail extending tips are elongated, and that they are one of the parts of the Contains contact means protective carrier plate, which consists of an insulating material and arranged in a grid Contains holes which are arranged so that the tips of the terminals after insertion into the holes are kept at certain distances from each other and by the contact means. 8. Apparatus according to claim 7 and 5, characterized in that the protective carrier plate at least part of the outer surface of the standard rail covered and additional Includes holes to accommodate the screws. 9. Device according to one of claims 1 to 8, characterized in that it has at least one in the manner of Contains snap-button contact plugs and means for retaining the plug in the socket. 10. A method for producing a socket for a device for producing electrical connections and switchings, characterized in that its inner surface is produced by cold drawing. 30 9 8 33/0303 11. The method according to claim 10, characterized in that cold drawing is carried out by pressing a piece inside the socket, the outer Dimensions of this piece correspond to the desired internal dimensions of the socket, and previously the socket is machined by drawing so that its internal dimensions are slightly less than desired. 12. Contact means for making electrical connections and switching with at least a first and a second, spaced apart metal strip, the outer ends of which form a contact spring, with a hollowed metal part or a socket, with electrical insulations covering at least the first and isolating the second metal strip and the socket from one another, and with at least a first, a second and a third terminal which are electrically connected to the first metal strip and to the, respectively second metal strip or with the socket, characterized in that that it contains the contact means connecting components which the individual elements of the contact means holds tightly together in certain positions vis-à-vis the others. 13 · Contact means according to claim 12 »characterized in that that each of its components has a flat surface, and that the connecting components hold flat surfaces between them together in such a way that that alternately a metallic surface and a surface made of an insulating material touch. 309 8 33/0303 14. Contact means according to claim 13, characterized in that there is an additional first metal strip and contains another second metal strip, which in the absence a contact plug between them in contact with each other or with the first and with the second Metal strips stand, these additional metal strips between the first and the second metal strip are arranged, and these latter metal strips have a bend prior to assembly with the connecting components such that the metal strips can form sufficient contact with the first or with the second additional metal strip. 15. Contact means according to claim 1-3 »characterized in that there is also a further first and a further contains second metal strip, which when inserting a Contact plug between the first and the second metal strips can be in contact with the latter, and with these additional metal strips outside the gap between the first and second metal - stripes are arranged. 16. Control rail for a device for producing electrical Connections and switchings, which has an elongated shape, is made of an insulating material and has through openings, characterized in that it has an interruption which extends to a part the length of the openings going through the Hegelschiene divides the locking rail into two parts. 309833/0303 17 laying rail according to claim 17, characterized in that that it has means for closing the interruption on the longitudinal sides of the control rail. 3098 33/0303 Blank page