DE1948297A1 - Electrical contact socket - Google Patents

Description

Dr. phU. G. B. HAGEN. Patent attorney \ 3HO ΔΖ ( MUNICH 71 (Solln) Franz-Haie-Strasse 21

Telephone 796213

2567 Munich, September 22, 1969

AMP Incorporated
Eisenhower Boulevard Harrieburg, Penna., Y. St ". A.

Electrical contact socket

Priority: Sep 24, 1968; Y. St. A .; No. 762 088

The invention relates to an electrical contact socket for use in an “electrical connection arrangement, in particular a connection arrangement according to the applicant's German patent application P 17 65 459> 0 .

The electrical connection arrangement according to the German Patent application P 17 65 459.0 consists of a large number of individual housings which are arranged in a suitable mounting frame. Each housing has a plurality electrical contact sockets on, each of which for inclusion a contact pin is formed which has a radially extending sleeve between its two ends ► Two or more sockets are in each housing electrically connected together so that lead wires, with which the contact pins are connected after insertion the contact pins are electrically connected to one another.

Preferably, the individual contact sleeves for one such electrical connection arrangement means to attack an inserted contact pin and to fix

009816/1266

Bayerische Vereinsbank Munich 820993

JKB 256t ■. -2-: 194β297

keeping the contact pin in the socket against unintentional pulling out and means of maintaining it a contact pressure on the contact surface between the contact socket and the contact pin, whereby a permanent, low resistance electrical contact between the contact socket and the contact pin is guaranteed, "_ ■■ _

Since such electrical connection arrangements are often used in Plug-in tools are used or in conditions where weight and space are limited, the Length of the contact sockets is preferably kept to a minimum. Under these conditions, the application is better known Principles in the construction of contact sockets are not possible, and mil; known contact sockets have difficulties result in achieving adequate and sufficiently permanent electrical contact between the Contact socket and an inserted contact pin.

An electrical contact socket with a hollow cylindrical main part that is used to receive a contact pin is formed at one end, is characterized according to the invention by an engaging on a pin rope that extends from the other end of the main body, the on the pin engaging part is rigidly arranged on the main part and wherein the main part is resiliently deformable along its length as a result of movement of the at one Pin engaging part away from the longitudinal axis of the main part, whereby when inserting the contact pin's the main part is resiliently deformed along its length and wherein the main part acts as a contact spring, which acts on the pin Part presses against the contact pin.

A plurality of such electrical contact sockets can be contiguous be formed with a common carrier strip. .-- "· - - '" .-, - ■ -..... ".'

009816/1286

AMP 2567

AusfÜhrungsbeiepiele the invention are below in Described in more detail in relation to the drawings. In the Drawings segregate

figur 1 «a perspective representation of a die cut B, the manner in which the contact sockets according to the invention are shown Metal strips are formed

Figure 2 is a perspective view of a farting Section of metal of the type as used in the manufacture of a female contact strip according to Fig. 1 is used;

Figure 3 is a perspective view of a strip of contact books, showing the way in which the distance between adjacent bushings is reduced by bending them together of the mature wipers Sockets;

Figure 4 is a perspective view of a strip of contacts, showing how the sockets can be bent out of the original plane of the strip to make them to be arranged parallel to each other;

Figure 5 is a perspective view of a contact socket, in which a contact pin is inserted, showing how the contact socket and the contact pin engage one another;

FIG. 6 shows an exploded view of a module arrangement, which is suitable for use with an electrical connector assembly, the manner in which the female contact strip according to FIG. 4 is arranged in the Kodulgehäuee

Figure 7 is a sectional end view of the module assembly of Figure 6, with a contact pin having one of the contact sockets is connected;

FIG. 8 shows a sectional view along the line VIII-VIII of FIG. 7;

Figure 9 is a plan view in section, with a single Contact socket in a recess in the module housing 6 is attached and the appearance of the socket before insertion of a contact pin is shown:

009816/1286

BATH ORIGINAL

AMP 2567 - 4 -

FIG. 10 shows a representation similar to Pig.9, wherein however, the appearance of the socket after the insertion of the contact pin is shown and wherein in particular the resilient deformation of the bush is shown;

FIG. 11 shows a sectional view along the line XI-XI in FIGS. 9ί and

FIG. 12 shows a representation similar to FIG however, the appearance of the socket after insertion of the contact pin is shown.

As Fig. 1 shows, the contact sockets 2 are made as a continuous strip 4, which is a pair of at a distance having parallel carrier strips 6 and 8 located from one another. The carrier strips 6 and 8 are through with transverse webs 10 connected to them are connected to one another, and a single bushing 2 is connected to each carrier strip 6 and 8 on each side of each transverse web 10 by means of sideways extending connecting strip 11 connected. the individual sockets 2 are punched out of the metal and shaped, and the distance between the individual sockets 2 is therefore determined by the final diameter of the bushes 2. This distance is slightly larger than the distance which is normally required in a contact connection system is, and the distances between adjacent sockets 2 on the strip 4 must be shortened before attachment the sockets 2 in a module housing. This shortening of the strip 4 is achieved by bending the sections together 6 and 8 of the carrier strip extending between adjacent sockets 2, as at 12 and 14 in FIG Fig. 3 is shown.

A strip 4 of contact sockets 2 in those shown in FIG State can be used in an electrical lead-in connector assembly. As in detail in the aforementioned German patent application P 17 65 459.0 is explained, such arrangements can then be used when it is desired to connect lead wires together, v.; elcfc.e to extend axially towards one another.

009816/1286 ^

^A BAO ORIGINAL

The connecting strips 11 can also, as at 16 in Fig. be bent to the individual contact beeches .2 side on Side to be arranged parallel to each other in a common alignment. Strips of contact sleeves 2 according to FIG. 4 can are used in feed module arrangements according to FIG. 6 and 8 for forming releasable electrical connections between lead wires which extend parallel to one another in Extend towards a common connection point.

* The construction of the feed connection module assembly of Fig. 6 through 8 will be briefly described below for the purpose of explaining a specific use of one of the present invention Contact socket and an electrical connection according to the invention.

Each add-on connection module assembly 18 consists of one generally rectangular insulating housing 20 made of a suitable rigid plastic material such as diallyl phthalate with a A plurality of cavities 22 extending from the top 23 to the bottom 21 (Figs. 7 and 8). Fig. 6 shows a module arrangement 18 in an inverted position for the purpose of explaining the structure of the underside 21 of the module arrangement 18 and for the purpose of explaining the manner in which the strip of contact sockets 2 in the module arrangement is arranged. Recesses 26 and 28 are on the underside 21 of the housing 20 is provided, and groups of interconnected sockets 2 are through this Recesses 26 and 28 are introduced so that the individual contact bushes 2 are arranged in the cavities 22. In ' 6, the recess 26 has six cavities 22, and a strip section 25, on which six sockets 2 are arranged, is fastened in this part of the housing 20. The recess 28 has two individual cavities 22, and two individual ones. Sockets 2 connected to each other at 27 are, are inserted into the cavities 22, which siel} in open the recess 28. After inserting the sections

009816/1286

AMP 2567 -6 -

25 and .27 of the strip into the cavities 22, as in Pig. 6th

a suitable lower cover plate 30 is shown on the

Underside 21 of housing 20 cemented to the sections 25 and 27 of the strip to be held in the housing 20 »

A sealing block 24 made of a relatively soft material is attached to the top 23 of the housing 20. By The block 24 has passages 29 which communicate with the cavities 22 in the housing 20.

The individual contact pins can, like. 7 and 8 show that they are moved downwards through the passages 29 in the sealing block 24 into the individual contact sockets 2 which are arranged in the housing 20. The module arrangement shown in FIGS. 6 to 8 provides a common connection for six individual conductors on the right-hand side in FIGS. 6 to 8 and a common connection for two individual conductors on the left-hand side. As explained in German patent application P 17 65 459.0, module arrangements of this type are produced in a large number of different embodiments which can produce common connections between different numbers of conductors. Can in the same manner Einff.hr module arrangements in which a strip with aligned sockets 2, as shown in Figure 3 _e, is fixed, may be provided to interconnect with one another have different numbers of conductors.

The individual contact sleeves 2 each have a cylindrical one Main part 36 with a slot 38. Retaining tabs 40 are from the wall of the main part 36 on each side of the Slit 38 knocked out and run obliquely inward in the direction of the longitudinal axis of the main part 36, the retaining tabs 40 are designed so that they press against a 'inserted contact pin and this in the socket hold in a manner yet to be described. Approaches 42 are

ooaate / uee

AMP 2567 - 7 -

contiguous with the main part 36 on each side of the Slit 38 formed and run obliquely inward with respect to the longitudinal axis of the main part 36, the lugs 42 being connected to the main part 36 along curved lines 50, whereby the lugs 42 upon insertion • Resistance to sagging in a contact.

Contact sockets according to the invention are advantageously produced from strip material 44 (FIG. 2) which has a relatively wide layer 46 of thin sheet metal with good spring properties, e.g. B. Beryllium copper. A relatively narrow layer of highly conductive metal 48, e.g. B. pure copper, eats in the _; Layered midway between the edges of the sheet 46 on the surface thereof. Blanks are stamped out from the multilayer strip material 44 (as FIG. 1 shows), so that when the contact sockets 2 are formed, the main parts 36 are formed only from the layer 46, while the inner surfaces of the lugs 42, the inner surfaces of the connecting strips 11 and the carrier strips 6 and 8 have a layer of the highly conductive metal 48. During manufacture, the connecting strips 11 are curved so that they are adapted to the curvature of the main part 36, so that the strips 11 form a contact surface for engaging an inserted contact pin.

The individual contact pins 32 (Fig. 5, 7, 9, 10, 12) have cylindrical main parts 52 with wire receiving openings at their rear ends - receiving the stripped ends of lead wires 34, the pins 32 being attached to the lead wires by means of any suitable electrical means Pressing process, as shown at 54. Between the ends of the main part 52, each pin 32 has a circumferential collar 58 which is directed rearward

009816/1286

- _t * -v

·. ■ i ORIGINAL BATHROOM

Shoulder 62 and a forward shoulder 60 forms. A conical surface 56 is provided at the forward end of the pin 32 and is adapted to engage the inner surfaces of the lugs 42 and move the lugs 42 outwardly when the pin 32 is inserted. The diameter of the collar 58 is slightly smaller than the inner diameter of the main part 36 of the socket 2 so that the pin 32 can be inserted into the socket 2, as shown in Figures 9 and 10 to. the forward shoulder 60 abuts the rearward shoulders 63 and 65 formed by the edges of the highly conductive layer 48 on the inner surfaces of the lugs 42 and the surface of the connecting strip 11fce. As a result, the shoulders 63 and 65 in the socket 2 act as stops which prevent the pin 32 from moving through the socket 2 beyond the position shown in FIGS. The tabs 40 are pressed outward while the pen is being inserted, and when the insertion process is complete, the tabs behind the cuff 58 rest against the rearwardly directed shoulder 62 of the cuff 58. In this way, the tabs 40 prevent accidental removal of the pin 32 from the socket 2, but a single pin 32 can be removed from a socket by means of a suitable removal tool designed to surround the conductor 34 and the main part 52 of the pin 32 . Such removal tools can the retaining tabs 32 are moved to _f eie press 40 to the outside, whereby the pin 32 and the ^ fcntnahmewerkzeug from the socket 2 may be removed along the axis of the pin.

Like FIGS. 9 to. 12 show that the Buchseh 2 containing Cavities 22 have a shoulder 64 adjacent the side 23 of the housing 20, which allows movement of the individual Prevent bushings 2 to the left in FIG. The cavities 22 also have a diameter which is slightly larger than the outer diameter of the bushes

009816/1286

2 iat, so that a circumferential expansion of the sockets 2 at Insertion of the pins 32 is prevented. Contact pressure between the inner surfaces of the connecting strip 11 and the foremost tip 56 of the pin 32 is caused when the contact pin is inserted by the fact that the tip 56 of the pin 32 forces the lugs 42 to move in relation to one another to move outwards away from the longitudinal axis of the socket 2, such as Pig »10 and. 12 show. The approaches 42 are, however rigid along their length by the fact that they are formed from a double-layer material, and in that the with the main part 36 of the socket 2 along a more curved than straight transition zone 50 is connected are. The transition zones 50 between the lugs 42 and the main part 36 of the bush 2 therefore have a high one Resistance to deflection in contrast to a simple straight-line transition zone, due to which the approaches 42 would act as simple cantilevers, i. E. they would be bent outwards.

Because of the rigidity of the lugs 42 and the fact that they are forced to move when the To move the pin 32 outward, the introduced by the Contact pin 32 transmitted loads from the lugs 42 to the main part 36 of the socket, the deforms along its length due to these loads, as shown by Mg «10 and 12» As shown in Figs. 10 and 12 the main portion 36 tends to flex inwardly, particularly in the portions indicated at 70 between the slot 38 and the tabs 40. At least these sections 70 of the main part 36 act as elliptical or semi-elliptical springs that resiliently bias the inner surfaces of the lugs 42 against the surface of the order end of the pin 32. The lugs 42 in turn tension the underside of the pin 32 (see * Fig. 12) against the surface of the connecting strip eÄsll · before. In the special embodiment of the invention shown in the drawings

009816/1280

lit ..

AMP 2567 - 10 - '

the type of deformation also that the slot 38 is widened somewhat in the main part 36, and that immediately adjacent to the lugs 42, and that it is between the ends of the main part 36 is closed. The back end of the Slot 38 may open somewhat as a result of the stresses caused by the insertion of pin 32, or it after insertion can be the same width as before insertion. The main part · 36 takes after the insertion of the Pin 32 has a slightly oval shape, the main axis of the oval extends to the slot 38 at the top of the main part 36. This effect is best shown in FIG. 12 where it can be seen that the top edge of the right side of the main portion 36 of. the shoulder 64 in the housing 20 has been pulled away while the edge on each side of the slot 38 rests firmly against this shoulder 64 (cf. Eig »10).

In the case of the contact described above, the main part 36 of the socket 2 deforms along its length when the pin 3.2 is inserted and acts as a contact spring that holds the inner surfaces of the lugs 42 against the surface of the inserted contact pin 32. As already mentioned, the lugs 42 press the front end of the contact pin 32 against the surface of the connecting strip IL. The surface of this connecting strip 11 has the quenching metal 48 which extends continuously to the other contact sockets 2 of the group. In this way, an electrically conductive path of low resistance is formed between contact sockets 2 in the module arrangement 18. The lugs 42 themselves act to a certain extent as contact means _s and zv / ar in that they are tensioned resiliently against the pin 32. The current flow from the lugs 42 of a socket 2 to a further socket or sockets must, however, run through the main parts 36 of the socket 2, and in the described embodiment this main part 36 consists of a material that has a relatively low conductivity (beryllium copper ) than the connecting strip 11 has. When the socket

Q09816 / 1286

BATH ORIGINAL

# ♦ · # el e *

would be made of homogeneous metal instead of the base material according to FIG. 2, the electrical effect would be of approaches 42 of greater importance than that described Example.

The exact mechanism by which the contact spring action achieved may differ from that described above Mechanism relating to the particular embodiment described the invention relates »to distinguish something. Changes in relation to the mechanism can e.g. B. Tone of the thickness of the metal 46, the length of the main part 36 and that caused by the end of the inserted pin 32 Degree of movement of the approaches 42 depend. It is entirely possible that there is a combination of effects results when the pin 32 is inserted, and it can • a slight outward bending of the lugs 42 with respect to on the main part 36 of the socket 2 after the Main part 36 itself was resiliently deformed, as shown in FIGS 12 show. In other words, when the end of the pen 32 during the movement of the pin 32 towards its fully inserted position first on the lugs 42 engages, the lugs 42 are moved outward, and the main part 36 of the bush 2 is resiliently deformed, as Fig. 12 shows. When the main part 36 is deformed, it becomes 3e <iock resistant to further elastic deformation, and movement of the lugs 42 with respect to the body 36, i. hi a bending of the lugs 42 with respect to the main part 3t »» "can take place ·

It is evident that the excellent feature of the invention, namely the use of the main part of the socket as a contact spring, with a large number of specific socket structures * - tions can be achieved as long as the approaches or their Equivalents remain resistant to flexing when the pin is inserted and act to transfer loads to the main part, which in turn is resilient Should be capable of deformation, so that it acts as a spring means can work. Q ή q ο 1 β / ι ·> q c

UU3Ö1DM286 patent claims:

BADORIGINAU

Claims (9)

P at e η t ans τ> r ii c V 1. electrical contact socket with a hollow cylindrical fieuptteil _r which is designed to receive a contact pin at one end, gekennz ei chn et by a pin engaging part (42) which extends from the other end of the main part (36), wherein the pin engaging part (42) is rigidly arranged (50) on the shank part (36) and wherein the main part (36) is resiliently deformable along its length as a result of movement of the pin engaging part (42) from the longitudinal axis of the Main part (36) path, whereby when the contact pin (32j) is inserted, the main part (36) is resiliently deformed along its length and the main part (36) acts as a contact spring which the part (42) engaging on the pin counteracts presses the contact pin (32). 2. Contact socket according to claim 1, characterized that the socket (2) made of metal (46) is formed with good Peder properties and a Layer (48) made of metal with good electrical conductivity over part of the surface of the bushing (2), ' and that the layer (48) has a shoulder (63) to attack the pin (32) to move the contact pin a (32) through the socket (2). 3. Contact socket according to claim 1 or 2, characterized g e.k en η draw ή fe t that the ah on the pen- ^ gripping part (42) is an approach that aiit coherently the other end of the Höüptteils (36) is formed and extends away from this. 4. Contact socket according to claim 5 »d ä ä ü r c h g e - ■ k en η ζ ei ch he t _% that the layer (4.8) covers the approach (42). bath 5. Contact socket according to one of claims 1 to 4, characterized by one from the wall of the main part (36) knocked out retaining tab (40), the extends towards the other end of the main part (36) and is designed so that it is attached to the contact pin (32) engages to hold the contact pin (32) against being pulled out of the socket (2). 6. Contact socket according to one of claims 1 to 5, characterized in that the main part (36) has an axially extending slot (38). 7. Electrical connection arrangement, geke η η ζ e ich net through a contact socket (2) according to one of the preceding claims, which is arranged in a cavity (22) in a housing (20) made of electrically conductive material, the cavity (22 ) the main part (36) of the bushing (2) is limited against circumferential expansion. 8 * Connection arrangement according to claim 7 with a contact socket according to claim 5, characterized in that a contact pin ('32.) In the socket (2) is used that the contact pin (32) has a circumferential mansehette (58) has between its ends that the tab (40) of the socket (2) on one side (62) of the sleeve (58) attacks and a movement of the contact pins it (32) prevented in an axial direction and that a shoulder (63, 65) on the socket (2) engages with the other side (60) of the sleeve (58) and prevents movement of the "contact pin (32)" in the other axial direction. 9. Electrical Kontaktbuehsensnordnung, geke η η is characterized by a large number of electrical · ■ '.: Contact sleeves (2) according to one of claims 1 to 6, which, coherent with a common. Carrier strips (6 ₉ β, 10) are formed. 009816/1286 10 »arrangement Naeh Claim 9" d ad urchge characterizing ζ eic haet that the support strips (6, 8, 10) consists of a pair of spaced extending from each parallel Trägerstrsifen (6, 8) which communicate each other by transverse webs (10) Terbuiiden are wherein a single contact socket (2) is provided adjacent to each of the transverse webs (10). 11 »Arrangement according to claim 10, dad ü rc h e: .- denotes that the carrier strips (6, 8) bent between each pair of adjacent transverse webs (10) be so that the contact sleeves (2) adjacent to the Ends of adjacent transverse webs (10) have a distance from one another which is less than the length of the carrier strips (6, 8) between adjacent transverse webs (10). BATH ORIGINAL 00981 $ 8/128 - Lee rs e ί te