DE1615751A1 - Improved socket design - Google Patents

Description

PATENT ENGINEERS FW HEMMERICH -GERD MD LlER. D. SIZE 21

4DOSSETDORFlO. HOM BERGERST RA S SE 5. 26 5 1967

bh'bi

W.A. BEA / CHAINE & SONS, INC., NEW HAMPSHIRE./ USA

€ stack cans

The present patent application is a continuation of my filed in the same matter Patent Application No. 3,8,347, which was filed on September 12, 1963.

The present invention is generally concerned with with electrical plug connections, but it deals in particular with an improved socket construction, which has and continues to have an insulating block housing of novel construction and arrangement mit.einem specially designed contact element is provided, which is inserted into the insulating housing and fastened there ' can be.

The present invention is an improvement on the above-mentioned patent application in the same way Matter described and illustrated device.

One of the problems that arise when using plug connections falling within the scope of the present invention can arise is the interruption of the electrical connection, which is caused by accidental loosening of the contact element comes from the insulating block housing. Often times, such an undesirable condition is caused by that in parts of the insulating block housing a There is a design or structural error or as a result, Contact element for reasons of stress

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21 179 May 26, 1967

solves the insulating block housing of the socket. So had it has been found that excessively large tensile forces acting on the with the lower parts of the socket contact elements connected wire ends act, the cam parts of the block housing shear or twist effect of the Kohtaktelemente into the recesses of the housing and out of the bottoms of the socket holes.

That is the reason why the present invention aims to provide a socket connection, whose insulating block housing is extremely rigid and uniformly constructed, in such a way that each only conceivable type of use a structural failure cannot occur.

Another object of the present invention is to provide an electrical receptacle connection in which the insulating block housing has a device which, after the contact has been made - disregarding the mechanical stresses and stresses acting on any part of the contact element - the loosening of the Contact element from the insulating socket block housing inevitably prevented.

The present invention further aims to create an electrical socket connection, the individual components of which can be assembled easily and quickly and, after installation, retain the arrangement given to them over a long period of use.

-Gl-

009820/0838

21 179 May 26, 1967

-Sl-

All other goals and intentions of the present * Invention can refer to the description and the drawings for a preferred embodiment of the subject matter of the invention can be found. In detail is:

Figure 1 is a plan view of the insulating block housing .the socket connection · two falling within the scope of the present invention Contact elements are shown.

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FIG. 2 is a bottom view of the one shown in FIG insulating block housing. Here, too, two inserted contact elements are shown.

Figure 3 is a perspective view of the contact element before insertion into the insulating * Block housing of the socket connection »

FIG. H is an end view of the contact element shown in FIG.

FIG. 5 shows a side view of the contact element shown in FIG. -

Figure $ a plan view of the in part of the insulating Block housing incorporated 15-way socket outlets.

FIG. 7 is a sectional view along the line 7-7 of FIG Figure 6, the inside of the socket holes is shown.

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FIG. 8 shows a sectional view along the line 8-8 of FIG. 6. There is another view of the interior der.Steckdosenlöcher given, with part of the contact element and one shown in dashed lines Use pattern.

FIG. 9 is a partially broken perspective Representation of the socket inside before the installation of the contact element.

FIG. 10 is a partially broken perspective view Representation of the reproduced with Figure 9 Socket showing the assembled contact unit.

FIG. 11 is a plan view of the part of the insulating block housing incorporated socket holes or socket.

FIG. 12 shows a plan view of the ones shown with FIG. 11 Outlet holes or socket. The assembled contact element is shown.

FIG. 13 is a sectional view taken along line 13-13 of FIG Figure 12 · The inside of the socket or the socket holes is shown · »but especially the flange, the cam element and the stop element.

FIG. 14 is a sectional view taken along line 14-14 of FIG Figure 12. Another view of the interior of the socket or socket holes is shown.

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The subject matter of the invention will now be described with reference to the drawings attached to this patent specification. figure represents part of the insulating block housing 16, which is made of phenolic resin, hard rubber or an equivalent and similar non-conductive material. A series of socket holes 18 are machined into the insulating block housing in such a way that they the contact elements (which will be described later) can pick up and hold. It should be noted that the socket holes are even Are spaced apart so that a correct electrical connection is ensured.

With the figures 3 - 5 a contact element of the socket connection is shown shown. This contact element 20 is such " shaped and designed in its dimensions that it is in a socket hole 18 of the insulating block housing can be permanently mounted »The contact element 20 of the socket connection is made of an electrically conductive material, e.g. made of copper, which can also be elastic should. The contact element 20 of the socket connection is e.g. by punching - formed from a simple strip in such a way that the two similar lower legs 22 diverging upward from a common lower part or a common lower bend 24 extend. The lower legs 22 are first bent apart so that that the substantially horizontal leg parts 26 are formed, and then bent upwards, that the diverging upper legs! parts 28 are formed will.

The upper ends of the leg portions 28 become with the back bends 30 provided and downwardly diverging spring

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21 179 May 26, 1967

arms 32 are arranged so that they almost meet at their lower ends 34. This arrangement of the almost mating lower ends 34 makes it possible that a plug pin between the two elastic Spring arms 32 can be introduced and held there to ensure an electrical connection.

Above the recesses 38, the lower legs 22 can be provided with reinforcing ribs 36. The recesses, which are incorporated into the lower legs, are used for receiving and fastening (the one not shown) Wire ends. The upper leg parts 28 are provided with cutouts M-O which extend diagonally to one another opposite. These cutouts 40 provide the necessary Game when the contact element 20 is inserted into the plug hole 18 of the insulating socket block housing. With the exception of the cutouts 40, the side edges 42 are and 44 of the contact element 20 of the socket connection only arranged in two planes. The side edges can be attached to the best observe in Figure 4.

The insulating block housing 16 can be provided with any number of machined plug holes 18. the preferred embodiment shown in the drawings is designed so that each plug hole has a rectangular cross-section in the horizontal direction and with the opposite vertical end walls 46, 4-8 and side walls 50, 52 provided. A vertically extending recess 54 is machined into the side wall 50, a similar recess 56 in the side wall 52. Each recess has a horizontal Direction has a rectangular cross-section and is smaller than the plug hole in which it is located,

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The recesses are in diagonally opposite one another Corners of the plug hole housed and aligned with end walls 46, 48. The recesses extend down and are open on the bottom surface of the insulating block case.

Cam elements 58, 60 are each on the side walls 50 and 52 put on. The cam element 58 is located directly opposite the recess 56, while the cam element 60 of the recess 54 is opposite. Every corner learner has a beveled engagement surface 62, a horizontal support surface 64 and a rounded one and upwardly directed nose 66. In diagonally opposite corners of the plug hole 18 are the Cam elements arranged in such a way that they form a unit with both a side wall and an adjacent end wall. By this design feature the cam element is reinforced to a large extent and the possibility of it being used during use could break off, largely reduced.

From Figure 8 it can be seen that the contact element 20 of the Socket connection can thereby be inserted into the socket hole 18 of the insulating block housing that it first of all this way up into the open bottom of the plug hole is pushed that its upper leg parts 28 sliding against the plug hole walls 46, «48« An assembly tool 68 shown in dashed lines is shown in FIG the upper open end of the socket hole 18 is inserted, then brought down to the spring arms 32 in a vertical position to spread »Because the contact element of the socket connection is pushed upwards without turning,

009820/0938

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21 179 2 6.5.19 67

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the side edges 42, 44 of the back bends 30 lie against the beveled engagement surface 62 of the cam elements 58, 60 at. This double intervention force gradually and after each upper leg part 28 and its associated spring arm 32, (which by means of the assembly tool 68 have been compressed) into the recesses 54, 56.

The introduced contact element 20 of the socket connection is.in the recesses 54, 56 guided upwards until the back bends 30 the surfaces of the cam lugs 66 make free. The elasticity inherent in the contact element then allows the contact element to return to its original state Form snap back, with the upper parts of the contact element in the correct position over the cam elements to be brought. As a result, the back bends 30 and the cutouts 40 come over the cam lugs 66 and the Support surfaces 64. Now the contact tool can be removed so that the elastic spring arms 32 are back to their can assume an almost close-fitting arrangement. In this condition the contact element 20 of the socket connection cannot be pushed downwards out of the socket hole 18 because the cam elements resist it. However, the contact element cannot go back into the cutouts either be rotated back because the lateral edges of the upper leg parts 28 and the uncompressed Feather arrows 32 against the sidewall unpen 50, 5 2 des Socket holes.

To the Kpntaktelement 20 of the socket connection on a further upward movement, which from the socket hole could lead out, the end walls 46, 48 are each provided with the lip-shaped flanges 70, 72,

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21 179 26.5.1967

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which extend over the cam members 58, 60 into the interior of the socket hole. Thus a downward movement of the built-in contact element is prevented by the cam elements, but the upward movement is prevented by the presence of the lip-shaped flanges. Because the lateral compensation of the contact element is completely taken over by the cam elements during assembly, because the contact element is not twisted during the upward movement during insertion, all contact elements can, if so desired, be inserted simultaneously using an automatic apparatus. '■ _

It should be clear that when the socket connection is used, the plug pin (not shown here) is inserted between the elastic spring arms 30 - spring arms of the contact element 20 - and is held by them by friction. The spring arms 30 are pressed together by the plug pin up to a position which occupies the middle between the position shown in FIG. 10 (in the uncompressed state) and the position shown in FIG. 8 (in the completely compressed state by the assembly tool). This creates a situation in which the electrical connection can often fail. Because if pronounced lateral forces on the pin _s act then-it would be possible, first one side of the upper part compress the contact element and then the other, while at the same time over the wire connector on the bottom end 24 x of the contact element a torsional force and a tensile force works. The resulting force could then pull the contact element down from the cam elements.

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pull and cause its re-entry into the recesses, so that the contact element down from the Socket hole is pulled out.

To avoid this is in the recesses 54, 56 respectively a pair of stop devices 74, 76 have been arranged, as best shown in FIGS. 9, 13 and 14. The stop devices are made in one piece with the end walls 46, 48 and form at the entrance to Recess has a retaining surface 78 which with the side wall in which the recess is machined in approximately the same level. The stop devices should override the contact element after it has been installed and fixed prevent the cam elements from re-entering the recesses. The effect of the hold function remains on the extent the compression of the spring arms 30 by the pin unaffected because the holding surfaces 78 on the upper leg parts 28, (which always remain aligned vertically and rest against the end walls) act and not on the spring arms 30,

The stoppers 74, 76 each have a beveled surface 80 and a vertical surface 82, which are constructed in such a way that they allow easy installation of the contact element 20 from the Eoden of the socket opening allow off. This is possible because the lateral edges 42, 44 of the upper leg parts 28 as well as the back bends 30, the upper leg parts 28 are first inserted into the recesses below the holding surface 78 then within the recesses and against the beveled surfaces 80 as well as against the vertical surfaces 8 2 after be pushed up. Preferably, the surfaces 80,

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44

82 of the stop devices have the same width as the recess in which the respective stop element is arranged, so that each stop device not only forms a unit with the end wall, but also with the wall of the adjacent recess. This increases the strength of the stop device and its construction to a large extent and, in the same way, reduces the likelihood that the stop device will break off during use of the socket connection.

It is. It is important that the insulating housing 16 described and illustrated herein be designed so that it can be manufactured using a two-part mold. This is a very important factor economically.

It should be noted that, in another embodiment of the subject matter of the invention, the block housing could only be provided with a cam element, recess and stop. Furthermore, it is possible to implement the contact element in shapes other than the shape described and shown here. These alternative constructions are included to illustrate the many modifications and changes that may be possible based on the foregoing. It should therefore be clear that the application of the present invention is not limited to the details and arrangement of parts specifically described and explained here, that the subject matter of the invention is also implemented in a manner other than that described and explained here within the scope of the patent claims appended to this patent specification can be.

-Al-

009820/0938

Claims (1)

21 179 VJ.A. BEANCHAINE S SONS, INC., NEW HAMPSHIRE '/ USA Claims 1) A socket construction for an electrical plug connection, consisting of a contact element with an upwardly diverging pair of legs, which with its lower ends in connection with one another and its upper ends so inwards and downwards are bent so that two adjacent spring arms are formed, as well as from an insulating block housing with an open outlet opening for receiving and holding the aforementioned Koritakt element. The socket opening has vertical side walls and end walls and has horizontal Direction is essentially a rectangular cross-section. In the side wall near the diagonally Corners lying opposite one another have two recesses which extend in the vertical direction. These recesses are smaller than the aforementioned socket openings and extend at Top view beyond its periphery. The socket opening is provided with a pair of cam elements, which is arranged on or on the already mentioned side walls and the already mentioned Recesses opposite. The socket opening has a flange, which is above the Cam elements extend into the socket opening. In the recesses of the aforementioned socket opening stop devices are embedded. By bending the spring arms in the direction of the relevant Leg it is possible to use the contact element - A 2 - 009820/0938 Ί3 21 179 May 26, 1967 to be inserted into the socket opening with a twist-free upward movement; while During this process, the arms and legs are initially sideways due to the action of the cam elements inserted into the recesses and then quick after releasing the upper surfaces of the Mockenelernente back to its original shape; during this process, the contact element is against a Vertical shift out of the socket opening secured by the cam members and the flange, while the stoppers are the arms and legs prevent them from re-entering the recesses from the side. - A 3 - 009820/0938 AH- 21 179
May 26, 1967 2) For an electrical connector according to claim 1, wherein the stop device pair within the aforementioned Recesses is arranged on the already mentioned end walls. 3) For an electrical plug connection according to claim 2, in which the aforementioned pair of stop devices each have a holding surface that runs parallel to the opposite side wall of the socket outlet and
is also provided with a surface which runs obliquely upward from the end wall and on which the stop device is arranged. During the assembly process, the inclined surface allows the already mentioned Xontakt element to be pushed upwards and at the same time prevents the contact element from laterally re-entering the aforementioned recess after the assembly process. 4) For an electrical plug connection according to claim 3, in which the lowermost parts of the aforementioned stop devices at a sufficient distance above the lowermost parts of the aforementioned squat elements
are arranged. Here the arms and legs of the contact part can move sideways during the upward movement are introduced into the recesses, even before touching the aforementioned holding devices
have been. Here the arms and thighs give the
upper surfaces of the stop devices free and lie
sliding against the
upward sloping surfaces. 5) For an electrical connector according to claim 3, in which the aforementioned holding surface of each stop 009820/09 38 -A4- • 21 179 26.5.1,967 direction is arranged parallel to the side wall of the socket opening in which the stop element receiving recesses is incorporated. 6> For an electrical plug connection according to claim 1, in which each cam element of the pair of cam elements with the side wall on which it is arranged, and the adjacent end wall are designed as a unit » -End - 009820/0938