DE2210904A1 - CONTACT SOCKET - Google Patents

Description

1568

PATENT LAWYERS

MBfiüflKKSXMXIHKBtESE FRICKE DR.-ING. R. DÖRING DIPL.-PHYS. DR. J. FRICKE

BRAUNSCHWEIG MUNICH

Berg Electronics Inc., Exit 16, York Expressway, New Cumberland, Pennsylvania I7070 / USA

"Contact socket"

The invention relates to a contact socket with an elongated Passage for receiving a pin-shaped contact wire, especially for the circuit board of printed circuits or the like.

Contact sockets for the detachable production of electrical contacts are known. For example, reference is made to US Patents 3,120,418, 3,363,224 and US Pat Re 26 837 referenced. These known contact sockets have two opposing lever-shaped contact arms on. In every known contact socket, the contact pressure is obtained by the resilience of the spring-like contact arms itself, so that the contact socket is only suitable for predetermined contact pressure required for contact wires Ensure thickness. At the same time, the contact arms form part of the electrical circuit through the socket. For a given Socket size, the arms acting as contacts and spring arms are not suitable for ensuring contact pressure.

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that is so high that it is sufficient for all purposes. ; When inserting a wire into the usual socket with a
at the same time as an electrical contact and as a spring arm DIE [nenden contact easily j via their elasticity tätsgrenze also claims the arms, which in a reduction of the
Contact pressure leads.

It is the object of the invention to develop a contact socket of the type described in more detail in such a way that the difficulties described are avoided and one of the suspension independent electrical connection path is created within the socket and a preload is ensured regardless of this:

makes a high contact pressure even with insertion; tion of contact wires with significantly different diameters. !

According to the invention, this object is achieved in that at least one contact arm is provided, which one from one. The end of the receptacle for the strip-shaped section surrounding the pin starts out and its free end extends into the interior of the ι Extends contact socket for engaging the contact wire,

and that a spring element is provided on the outside "of the \ socket body at least comprising a spring portion having the manner of a cantilever arm, which spring element
biases the contact arm into the interior of the socket body,
and finally in which a holding device is provided in order to hold the separate spring element on the socket body.

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Preferably, two opposing contact arms, each with their free ends, are to be pretensioned towards one another Cantilever-shaped spring arms are provided, the two spring arms belong to a common biasing spring element. The spring arms provide a contact pressure to form a sub high pressure electrical connection between the contact arms and an inserted contact wire or contact pin. The spring element can give way elastically in order to have a reliable one with thicker as well as with thinner contact wires Ensure bias of the contact areas. Even after repeated insertion of the contact wire into the Socket, the high contact pressure is retained. This also applies if the wire is extremely thin. The new contact socket is therefore particularly suitable for microcircuits, such as those used in printed circuit boards are common.

The two-part design leads to a compact socket with high contact force. This stems in part from the Fact that when a contact wire is inserted into the socket, the entirety of the spring element is acted upon, to bias the contact arms against the pin element. The spring arm or arms are in the form of spring elements according to Art a boom pretensioned. The one to hold the B'ederelementes Spring sections serving on the socket body are preferably wrapped around a collar of the socket and are both on rotation and also in the manner of an

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gers claimed. The spring pressure exerted against the contact arms is therefore due to the bias of all the different ones

ι Sections of the spring elements. This arrangement is therefore I.

highly effective as the entire spring is used to j

Contribute to the formation of the desired contact pressure. Since all !

Parts of the spring element - when inserting a contact wire '

^{: are} stressed, the socket can be made much smaller!

forms than is the case when using conventional spring elements, which are only claimed as cantilever springs j

if the same contact pressure is guaranteed with these ί shall be. Another major advantage is that the springs are not part of the electrical path through the Bushing, so that the springs can consist of a material selected only according to spring properties, the also leads to an increase in the contact pressure. The min- • Change in the size of the socket in cooperation with the improved spring properties allows the use of the Socket in circles in which only little space is available or in which the number of sockets is extraordinary is large and the sockets must be placed close together.

In one embodiment, serving to bias the] contact arms into engagement with the contact pin spring can ί from a length of spring wire be formed, which has two pairs of cantilever shaped spring portions and tordierende spring portions, which with one end

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of the cantilever-shaped spring sections are connected and which in turn are connected to one another via bridge-shaped spring sections which are subjected to bending. Two of the on; Spring elements subject to bending are formed by a U-shaped bent section of the spring wire, while the other two spring sections subject to bending are formed by the free ends of the wire. The ends of the spring elements subjected to bending act on the free ends of the contact arms in order to bias them into the interior of the socket. The contact arms are stiffened in order to avoid bending or wrinkling, and they comprise contact areas which are arranged approximately in the middle of the length of the arms, only these contact areas engaging the wire. The contact arms are rigid. Since the springs engage the ends of the contact arms, the contact pressure acting on the, wire pin is enhanced, since this pressure is greater than the contact pressure between the ends of the bending beanspruch-i th Fe derab sections and the contact arms.

In another embodiment, the spring element

from a hollow watch-glass-shaped section of a flat, metal

i tallenen spring plate. This spring element includes \

likewise two pairs of spring arms subjected to bending stress, ι

spring sections subjected to torsion and bending stressed;

demanded bridge sections. The strength of the individual spring j

sections of each spring can be adjusted to get th to the desired '■ contact pressure.

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The socket can be mounted on a circuit board using a

Contact pin are mounted on a collar on the

one end of the socket is attached to the insertion end. facing away from the socket. Alternatively, a solder resistant plug can be included in the collar
so that the solder cannot seep into the interior of the socket when the socket is mounted in a hole in the circuit board and the circuit board is wave soldered.

For assemblies with a low profile, ι

i of the socket body take out a tab between the contact fingers.

be latched and bent to make a soldered connection to the

i printed circuit paths on top of the circuit board; form. In this case, the end of the connector which
facing away from the insertion end of the socket, into a bore; of oversize of the circuit board be used. |

Another way to obtain a low overall height can be achieved by the fact that the end of the lead-in is removed turned end of socket into a solder-tight cap!

which in turn is inserted into an oversized bore ^! the circuit board is inserted and soldered there.

Contact sockets for circuit boards of the type described ί can be used to accommodate lines that are connected to
Circuit elements are arranged, for example on relatively sensitive

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integrated circuits. The bushing spring can be arranged so that it is opposite to the axis of the bushing body is pivotable within certain limits in order to move the spring sections subjected to bending according to the one or the other side of the socket axis and to accommodate non-aligned lead wires in the socket without subjecting these lead wires to unbalanced forces. So can the connecting wires of integrated circuits, which are often slightly off-center, can be inserted into the socket without the integrated circuit itself is subjected to forces,

which could damage the circuit.

The new socket allows the insertion of wires of widely differing diameters without being affected by the high contact pressure will. There is also no risk of the elastic limit of the spring arms or contact arms being exceeded. The contact socket is thus extremely reliable in use in situations in which lead wires are frequent can be pushed in and pulled out again without the contact pressure decreasing at the contact socket. The reliable one electrical connection between the socket and the connecting wire is guaranteed even with repeated insertion. Due to the two-part design, the socket body can be made of electrically highly conductive metal without that the material has special elasticity properties, since the elasticity through the spring material of the separate

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Spring element is guaranteed, which in turn is not off electrically highly conductive material needs to exist.

The invention is explained below with reference to schematic drawings explained in more detail using several exemplary embodiments.

^: FIG. 1 is a perspective view of a circuit board with components of the invention are attached to this by means of receptacles according to.

FIG. 2 shows a perspective view partially broken away in FIG a socket according to Fig. 1 on a larger scale,

FIGS. 3 and 4 are each sections along the cutting lines 3-3 and 4-4 of FIG. 2.

5, 6, 7 and 8 are each cross sections through the socket of FIG. 4 along the section lines 5-5, 6-6, 7-7 and 8-8.

FIGS. 9, 10 and 11 illustrate further exemplary embodiments the socket connection according to the invention.

Figure 12 is a cross section taken along line 12-12 of Figure 10.

FIG. 13 is a section taken along section line 13-13 of FIG. 11.

FIGS. 14, 15 and 16 illustrate further exemplary embodiments for a socket connection according to the invention.

FIG. 17 is a section taken along line 17-17 of FIG. 15.

FIG. 18 is a section taken along section line 18-18 of FIG. 14.

19 schematically shows the pivoting movement of the spring in a

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Socket again depending on the position of the cable or plug part in the socket.

Fig. 20 shows the engagement between one end of the spring fingers and the contact arm of the socket.

21 and 22 show the socket body after the molding and before the assembly of the spring.

FIG. 23 is a section taken along section line 23-23 of FIG. 21.

Fig. 24 is a perspective view of another embodiment of the invention, in which the spring is formed by a stamping or stamping process.

25 and 26 are perspective views of springs used in the embodiments of FIGS 24 are used while

FIGS. 27 and 28 illustrate the formation of the spring of FIG.

As can be seen from Fig. 1, rows of spaced releasable connecting sockets 10 are on a Circuit board for forming electrical connections with the lines 12 arranged, which extend from a switching element 14 extend out into the sockets. The switching element can, for example be an integrated circuit.

Each socket 10 includes a socket body formed by stamping 16 with a reinforcement spring 18 wrapped around the collar 20 at the end of the body to which the conduit '

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receiving opening 17 is adjacent. Two identical contact arms 22 are formed on the sides of the socket body and extend into the interior of the socket from opposite portions of the collar 20. The spring 18 comprises opposing spring fingers 2k and 26 which extend from the outside of the collar portion along the outer surface of the contact arms and engage the contact arms near their free ends. The spring fingers are connected to one another by spring sections 28.

As can be seen from Fig. 2, the connection socket can be provided with a 'collar 30 at the end of the body 16, which of!

facing away from the opening 17 receiving the line, around the

To facilitate assembly of the connecting socket within a bore 32 which is passed through the thickness of the circuit board J> k . The collar can be secured to a pin 35 by means of a FaIt and solder connection. The pin can _(be used to connections between the connecting sleeve 10 *, and other circuit elements to provide specifically j either by a wrapped wire or Buchsenver- i binder which is provided on the pin. \

The formation of the connecting socket is shown below in the single Described individually: As can be seen from Fig. 5, the socket-j body 16 is generally square in cross-section and comprises two; opposing flat sides 36, which sides 38 interrelate connect, from which the contact arms 22 are formed <

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are. The collar 20 is formed by the ends of the side walls of the socket, which adjoin the opening 17, and is after outwardly inclined to form an insertion portion for easier insertion of a wire 12 between the arms 22. A seam, which is formed by the edges of the sheet metal blank from which the socket body is formed, extends along one side 36. A rectangular collar 30 has a slightly reduced cross-section compared to the body 12, so that the connecting portion 42, which the Body and collar connecting, forms a seat through which the insertion of the socket into the bore 32 of the circuit board is limited.

The width of the contact arms 22 decreases from the collar 20 to the free ends 44. The lower half 46 of the contact arms is bent at a shallow angle towards the upper half of the arms to provide contact portions 48 for the inserted To form wire, which are roughly in the middle areas of the arms. The free ends 44 are outwardly around one bent to a narrow radius in order to form recesses for receiving the free ends of the spring arms 24 and 26.

The introduction of a line 12 into the socket body leads to the flexing of the contact arms 48 outward. Since the arms come from the Body punched out, it is desirable between the arms and the edges of the fincer cutouts in the side walls 58 to provide a space. A liability between the

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free ends M and the lower edges 50 can thereby elimi- _; be ned so that the free ends are bent outwards,

to shorten the arms. The bend in the middle;

The section of the arms also serves to shorten the arms. Since the arms are inclined, the encryption \ performs shortening of the arms to the fact that the lower halves of the arms of the: are moved away edges 5, so that a bending out of the arms is made possible in the cutout window without interference and snagging.

The upper regions of the contact arms 18 can be prevented from getting caught on the cut-out windows by bending the upper edges 52 of the cut-out windows 50 outwardly out of the socket, as is indicated in FIG. 5, 6 and 7 illustrate that the upper edges 22 are gradually led outwards, from the center of the cutout to the ends of the cutout near the collar 20. Thus, FIG. 5 shows that the sections 5 ¹ * of the side walls 38 are bent slightly outwards from the socket. Fig. 6 illustrates that the sections are bent ^{at an angle of approximately Ί5 0.} In contrast, FIG. 7 shows that the sections in this area are bent over an angle of almost 90 °, so that they practically form extensions of the adjacent side walls 36. The bending out of the wall sections 5k increases the width of the window, so that bending of the contact arms within the window without contacting or catching of the arms on the edges of the windows does not occur

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must be feared.

It is. It is important that the contact arms are rigid over their entire length so that they do not form folds or the like during the insertion of the wire, which would reduce the contact pressure. The arms can be inward to cross-section
4 and in particular 5 illustrate in order to obtain additional strength and rigidity in the longitudinal direction. With this training it is possible to place the contact points 48 at a point which
the collar 20 is closer than the point of engagement between the [ contact arms and the spring fingers. The construction leads to
a contact force between each arm 22 and the line 12 which is greater than the force between the spring finger and ^the: end of the contact arm.

25 illustrates those in the first embodiment J.

used contact spring 18 prior to its installation in the socket body 16. The spring is formed from a single length of a spring wire a, the end portions of the wire two
straight, lever-like springs 56 which comprise the spring fingers ΐ 26. The spring ends 58 of the lever-like spring elements
56 are a continuous length of spring wire; trimmed to smooth corners 60 for engagement within; to create the recess at the contact arm end 44, as indicated in i FIG. 20. The smooth corners 60 and the recesses prevent getting caught between the spring fingers ^!

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2210304

- IH -

and the arm while inserting a wire into the connector socket 10.

The spring arm 2 4 comprises a flat U-shaped central section of the spring wire with two straight lever-shaped springs 62 and a U-connecting bend 64. The connecting spring sections 28 each comprise a short twisting spring section 66, which extends from the lever-shaped spring sections 56 and 62 extends outward to bridge the lever-shaped springs.

The socket body 16 can be bent or rolled from a section of sheet metal on a carrier strip 70, such as Fig. 21 illustrates this. The seam 40 on the collar 30 is left open to allow the end of a pin 35 to be inserted prior to closing the collar around the pin and to enable a soldered connection between them. A groove or recess 72 is formed in each side wall 36 which extend along the collar 20 slightly above the junction between the contact arms and the collar Spring 18 is wrapped or fitted around the socket body 16 with the bridge portions 68 of the spring in the Recesses 72 come to rest so that the spring arms 24 and 26 each extend along the outside of the contact arms 22. The free ends 64 and 58 are received in recesses at the ends 44 of the arms. The contacts 48 can with Precious metal coatings can be provided in order to increase the contact resistance

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- 15 'decrease.

The bridge sections 68 are spaced apart a distance that is slightly less than the distance between the recesses 72 so that when the springs are mounted on the socket body, the spring arms 62 are held slightly apart while the bridge sections 68 are pressed against the recesses 72. This will put the spring in their desired position on the socket body reliably held. The connection between the ends of the spring fingers and the contact arm also serves to hold the spring in the desired position.

In the spring 18 shown in Fig. 25, the free ends of the spring arms are normally located close to each other. When the spring is applied to the socket body, the spring tension normally holds the contact portions 48 of the Arms 22 against each other. The preload of the spring makes it possible to bring the contacts under a preload and to get a high contact pressure. The insertion of a wire 12 through the opening 17 and into the socket body is urgent the contact arms 22 apart, against the bias of the spring 18.

It is important to point out that the spreading of the contact arms biases each section of the spring 18. The springs 56 and 62 are bent outward and in the form of

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221090A

lever-shaped springs claimed. The four torsion springsab * _; , Sections 66 are subject to rotation, while the bridges *> sections 68 are under stress as lever-like springs * In this construction, the entirety of the spring is in all ^; put their sections under tension with the result »; that a high spring force comes into effect on the contact arms. ^: As previously mentioned, this force is multiplied due to the location of the contacts 48 with respect to the connection between the. Spring fingers and the contact arms. -

i Due to the nature of the spring 18, the pressure between the

Contact arms and the line 12 directly proportional to the outside

bending of the contact arms depending on cables of different thicknesses. In this way it is possible the comparison; bond female electrical reliable-for the formation of comparison, compounds to be used, in combination with relatively thin wires, as shown in FIGS. 2 and 5, and with lines of a greater thickness. The flexibility allows the same socket to be used to form electrical connections to any of a large number of different lines, thereby substantially reducing inventory levels while making an electrical connection

is ensured with high contact pressure for all lines.

! The introduction of the lead into the socket deforms the spring 18

! elastic, so that the contact pressure even with repeated use the line in the socket does not decrease. This is especially important in cases where the socket is used for formation

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of connections with lines of integrated circuit elements or other elements in which to assume is that the cables from the elements are pulled out and reinserted several times during the life of the sockets * are set.

The width of the pingers 22 as well as their throat-shaped cross-sectional configuration ensures that all are inserted into the socket Lead wires between the fingers are hurt with the Result that a reliable electrical contact is made. As Fig. 9 illustrates, the socket can be used to make electrical connection with round wires 80. Even if the round wires don't are inserted along the longitudinal axis of the socket, but touching a side wall 36, the contact fingers 22 engage the line and form the desired electrical contact.

As can be seen from FIGS. 1, 3 and 4, the connector socket 10 can be inserted into the bore 32 of a circuit board in which the end of the bore which is adjacent to the socket body is surrounded by the conduction path 7 * t of a printed circuit to form a soldered connection 7β between the socket and the conduction path. When the bore 32 is lined, the bottom of the circuit board 3 ^ so

; be soldered so that the solder goes up through the

passages 78 penetrating between the edges of the collar

ί 30 and the inner surfaces of the lined bore formed

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- 18 to form the solder joint 76.

Fig. 9 illustrates a modification of the connection socket 10, in which two tabs 82 are notched from the side walls 36 and are bent to allow insertion of the lower portion of the socket into a hole 84 of the larger diameter circuit board which extends through the full thickness of the circuit board 86. The tabs 82 can soldered directly to the printed circuit path 88 surrounding the top of the bore 84. By assembling the Connection socket 10 on the circuit board in the manner described, it becomes possible to use the circuit components that be carried by the sockets, closer to the circuit board, resulting in a lower overall height and a Saving space leads. Saving space is particularly important in computers and other apparatus that have a large size Number of circuits included, especially when limited space is available or when the necessary Components must be arranged next to each other in order to ensure high working speeds.

10 and 12 illustrate a further modification of the connecting socket according to the invention. With this one is the Collar 30 at the bottom of the socket body around a plug 90 bent around, this plug being cylindrical in the example shown and made of Teflon. This The plug is used to guide the solder. As shown in Fig. 12

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indicates, the walls of the collar 30 are deformed inwardly so that the collar firmly engages the plug. The collar and plug can be inserted into a lined bore 92 of the circuit board and extend through the thickness of the circuit board 9 ¹ J so that during dip soldering the molten solder flows through the four channels 96 between the walls of the collar and the liner on the sides of the bore to ensure a reliable solder connection between the part 98 and the printed circuit 100 on the top of the circuit board. The plug 90 serves to prevent the molten solder from flowing into the interior of the socket.

11 and 13 illustrate a further embodiment of the connecting socket according to the invention. At this the socket body 16 is formed without a collar 30 at the lower end. The lower half of the socket body is inserted into a cap 102 that is sealed against solder. The cap is generally square in cross-section and has side walls 104, which fit snugly against the side walls 36 and 38 of the socket body. The bottom of the cap forms a protrusion 106, the inserting the socket and cap into a bore 108 of a circuit board that extends through the thickness the circuit board 110 extends. A lip 105 on the edge the cap limits the movement of insertion into the bore 108. The circuit board 110 can then be treated by dip soldering, around a soldered connection 112 between the cap and the

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printed circuit 114 at the bottom of the circuit board. A flow-in solder connection or other suitable electrical connection can be made between the cap and the base the socket 10 so that an electrical connection is made between the circuit 114 and a lead; which is inserted into the socket. This type of mounting with ■ low mounting profile allows wave soldering of the Socket to make the electrical connection while ensuring that the molten solder cannot penetrate the socket body.

Fig. 16 shows a modified socket according to FIG. 2, in which for locking serving tips 118 are formed in the corners 120 of the * collar 30. When the collar is firmly in a Bore 122 of the circuit board is inserted, which protrudes through the thickness of the shuttering board 124, grip the tips 118 inside the bore on the bore walls and prevent movement of the socket 10 with respect to the circuit board before and during the formation of the solder joint 126 between the socket and the printed circuit board 128 on the top of the circuit board. The tips or tongues can be shaped before or after the starting sheet is rolled to form the socket body 16.

14 and 15 show two embodiments of the socket connection according to the invention, in which the bridge portions of the reinforcing spring 18 on the side walls 36 of the socket

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pivot to thereby permit the insertion of axially offset wires into the socket. The lines 12 are in communication with the body of the circuit element 14 at a location 130 which is arranged above the opening 17 of the socket is. As indicated schematically in FIG. 19, the

j axial plunging 132 of the lead wires from the exact

ί coincide with the axis 133 of the bushing. The lines can thus from a point 13Ο inside the socket

run to one side or the other of the axis of the bushing. It is very important that the socket can also accommodate offset lead wires and establish electrical contact with them without unnecessarily stressing the leads and without fear ^{of damaging the switching element I 1 I.} To this end, means are provided to permit the spring 18 to pivot slightly about an axis 140 with respect to the socket body 16 so that the contact arms 22 pivot together to one side or the other of the axis of the socket to receive the offset lead wire can. The pivoting of the spring ensures that electrical contact with the line is maintained, even if the circuit board is subjected to vibrations or shocks.

In the embodiment according to FIGS. 14 and 18, the center of the bridge sections 138 of the spring 18 is bent inwards so that they rest in recesses 72 in the center of the side walls 36 of the socket body. This results in a low

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allows docile pivoting movement of the entire spring about the axis l4O, as indicated. The freedom to pan allows the socket, one under high, with each side of wires offset a little from the axis of the socket To form a pressurized electrical connection without the line being exposed to unbalanced forces which the Circuit element from which the line originates, could injure or destroy.

Figures 15 and 17 illustrate an alternative pivot connection compared to the exemplary embodiments according to FIGS. 14 and 15. These pivot projections 144 are provided, which are arranged in recesses 72 in the middle of the side walls 36 are. The bridge sections 146 of the spring rest on the projections 144 in order to achieve the desired pivoting movement of the To enable spring when inserting an axially offset conductor wire.

FIGS. 24, 26, 27 and 28 relate to a further embodiment a socket connection according to the invention. Here, a reinforcement spring 148 is used, which consists of a flat spring metal material is stamped and shaped. The spring can be used in conjunction with socket bodies, which are identical to those previously described.

The spring 14l is produced from a spring metal material according to FIG. 27 by punching and stamping or bending. To this

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For this purpose, hollow preformed spring extensions 152 from im. - ■■. general watch-glass-shaped outline shape from a flat one Spring material by punching as a one-piece part of a continuation Carrier strip 15 ^ formed. The preformed. Sections 152 comprise a continuous strip of Spring metal in the general outline shape of a watch glass with four inclined spring arms 156. The two spring arms at each edge of the preform are through with one another connected a sinusoidal portion 158, the two curved Contacts 16O forms, plural marriage to the interior of the preform point. The other ends of the spring arms I56 are through parallel bridge sections 162 connected to one another. The flat die cut preforms 152 are symmetrical with respect to one another of the axis 164 formed. The preforms 152 are on the strip 15 * 1 by separable connecting sections 165 connected.

After the preform has been punched out, the next step is to form the spring of Figure 26 by bending the ends of the spring fingers 156 near the bridge portions 162 to form the stepped steps which lower the spring fingers below the bridge members . After the formation of the steps I66, the formation of the spring 1 ^ 8 is completed in that the preform is ^{bent almost 180 ° around the axis 16 1} \ so that the bridge members 162 are opposite one another and are at a mutual distance to the outside from the steps I66 . The Her-

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- 21 »- j

Positioning steps are performed while the preform is on the carrier strip of FIG. The following \ completion of the spring 148 is -darin that compounds 165 are cut to allow the mounting of the spring on the body 168 of the socket 150th j

λ ■

^: As FIG. 24 indicates, the spring 148 is fitted onto the socket body 168 by placing the bridge elements 162 in the recesses 170 on the collar 172 in the vicinity of the opening of the body which receives the line. The bridge sections lie flat against the collar. The spring arms I56 extend ι along the outer surface of the contact arms 174 of the socket; body, the rounded contact points I6O in the recesses, which are formed by the curved ends of the contact arms, which in turn prevents the risk of getting caught on the window edges. The remaining part of the spring arms 156 is free from the contact arms.

The insertion of a lead I56 into the socket I60 urges the Contact arms 174 apart and preload the spring 148. The spring arms 156 act as lever-shaped springs. Due to the fact that the arms decrease in width from the shoulders 156 to the points of contact 160, they are biased uniformly as they are flexed, resulting in maximum spring tension. The depositions 166 are used as torsion springs, while the bridge sections 162 are acted upon as lever springs.

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221

With the spring member 18 described, each section of the spring 148 is put under tension to the contact points with the inserted wire in the socket 150 under high contact pressure to put. The result is a highly effective connector socket that connects different wires of different sizes Can accommodate thickness and cross-sectional shape without stressing the spring over the elastic limits. The contact pressure is maintained even if the wire is inserted and withdrawn several times from the socket.

In both sockets 10 and 150 it is possible to change the contact characteristics of the bushing by changing the parameters of the spring which is used to adjust the To keep contact arms in engagement with the wire. In any case, the characteristics of the spring arms which are attached to the Attack the contact arms of the torsion springs and the characteristics the lever arms serving as bridge elements can be adjusted in order to obtain the desired socket character. The adjustment of the spring characteristics is particularly easy in the case of the spring l4l, since the. Width of the various spring elements can be easily controlled by the punching operations. For example, for a weaker spring, the decreasing Width of the spring arms 156 and the other spring parts can be prevented. If desired, the compensation of the To balance characteristic of the three types of springs within the spring bushings l8 and 1 ^ 8, this can be done by using the socket can be achieved without any individual

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Section of the spring is stressed beyond its elastic limit.

The socket 150, like the sockets previously described, may have a wire wrapped pin, a plug, an anti-solder pin sealed cap or provided by other means which provide an electrical connection to a circuit element form. The sockets described can also be provided with a flare connection to provide a flanged connection between the Socket and a wire to form. While the exemplary embodiments shown are all a design of an electric « binding with the socket near the collar point is a m .: ■ It is not intended that the invention be limited to this feature. There may also be other contact connection elements different from the the wire receiving openings or from other portions of the socket.

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Claims (1)

- 27 claims O connecting socket with an elongated channel for receiving a plug wire or the like. With a band-shaped section which surrounds one end of the passage, characterized by two opposing contact arms (22) which extend from the band-shaped section (20) and extend through the passage extend, with the free ends ( ¹ I ¹ I) of the arms normally lying in the passage, through connecting elements which are connected to the band (20) in order to establish an electrical connection with a circuit element. set, and by a spring (18) which is held on the band (20) and has two spring arms (2 * 1.26), which J extend along the outside of the contact arms (22) and bias their free ends towards one another. 2. Contact socket according to claim 1, characterized in that the spring (18) consists of one single length of a spring metal, which extends around the outside of the band-shaped portion (20) and each of which arms (24,26) comprises two sections (56 and 62, respectively) of spring metal, and each section extends from the The band (20) extends along the outside of a spring arm to a position near the free end of the spring arm 13/0693 221090A 3. Contact socket according to claim 2, characterized in that the spring consists of a single length of spring wire and one spring arm has a U-shaped section (64) made of spring wire and the other spring arm has the free ends (58) of the wire section. \ 4. Contact socket according to claim 2 or 3, characterized in that part of the spring (18) is received in a groove (72) which is formed in the band-shaped portion (20) and is located between the connecting portions (66) between the Fingers (24,26) and the band (20) extends. 5. Contact socket according to claim 1 to 4, characterized gekennzei c Ii net that the elongated passage is formed by an elongated, hollow socket body (16) which at one end has an opening (17) for receiving of the plug wire and at the other end means (30) for forming an electrical connection with a circuit element having, wherein the two opposing contact arms in the central portion of the socket body are formed and extend from one end of the socket body into this, the free Ends close together. 309813 / 0fi9 3 221090A 6. Contact socket according to claim 1 to 5, characterized in that the spring arms according to Art a boom acting spring elements and the connecting portion (68) at least one stressed to rotation Has spring portion. 7. Contact socket according to claim 5 or 6, characterized in that each contact arm chnet Has stiffening or reinforcement to prevent bending (see. Fig. 5). 8. Contact socket according to claim 7 »characterized in that the free ends of each . Contact arms are bent outwards to form a recess to accommodate the free ends of the adjacent spring arm. 9. Contact socket according to claim 5 to 8, characterized in that a partially open chnet Collar (30) is provided, which can be closed around one end of a wire winding pin (35) to with this to form an electrical connection. 10. Contact socket with an elongated, hollow socket body and an opening at one end for receiving a contact pin, characterized by a contact arm extending in the longitudinal direction, the 309813/069 3 is formed on the socket body and the free end of which extends into the interior of the socket body in order to to get into contact with the contact pin and by a spring element on the outside of the socket body with a designed in the manner of a cantilever spring section which biases the contact arm within the socket body and by holding means with the aid of which the spring element is fastened to the socket body. 11. Contact socket according to claim 10, characterized marked z. ei chnet that the spring element has a connecting element which is at least partially around extends the outer circumference of the socket body. 12. Contact socket according to claim 11, characterized in that the connecting element has a bracket which resiliently engages the outside of the socket body. 13. Contact socket according to claim 12, characterized in that the connecting element has a displacement preventing portion of the bracket. I ¹ J. Contact socket according to claims 1 to 13, characterized in that the for holding the. Spring serving clip element at least one section 309813/069 3 (66) which biases the contact arms into the interior of the socket body. j 15. Contact socket according to claim 1 * 1, characterized characterized in that the biasing element is a [ twisting spring section (66) is. 16. Contact socket according to claim 1 to 15 » characterized in that one against solder : tight cap over the end of the cone facing away from the opening clock socket is pushed over sealing (Fig. 11). 17. Contact socket according to claim 16, characterized in that the free ends of the contact arms and the fire arms are disposed inside the cap (102). 18, biasing spring for a contact socket of claim 1 to 17 "consisting of at least one elongated cantilevered spring arm and an at least partially around the circumference of the sleeve GROI i 'end holding portion. 19. Vornpannfe.rier according to claim 18, d a d u r c h g ο k «n η ζ eich η et that two elongated au. ^f ; -logerförmi {r (i Fe the arms are provided, the free ends of which are close toic; iΐι; πκ1 (; ΐ · and at the least »oiii I'.rückonabMchnil-t (; i '} of /' i- rhen: i; 5t-, «er die nn <if? rnn Emien ύον 3 0 UH 1 '-I / f] fi U 1 BATH Spring arms (24,26) connects and at the same time a clamp-like Forms retaining portion for the spring on the socket body. 20. Pretensioning spring according to claim 19, characterized in that each ^ he spring arm (2 ¹ I or 26) has two elongated cantilever-shaped spring elements (56 or 62), each with a spring element of the other arm via laterally offset bridge sections (28) are connected, at least the spring elements (62) of one spring arm (24) being connected to one another by a connecting section (64). ' 21. biasing spring according to claim 20, characterized in that each bridge portion (28) has two torsion stressed sections (66) and a straight spring section (68). ; 22. biasing spring according to claim 18 to 21, characterized gekennzei chnet that it consists of a single Length of a spring wire, the two ends of which form the spring elements of a spring arm (26). 23. biasing spring according to claim 18 to 21, characterized in that the cross section of each cantilever-shaped The spring element decreases along the length of the spring element from the bridge section (FIG. 26). 3098 13/0693 2U. The contact socket of / rgsn / one of the preceding claims, characterized in that ;, disengaged from a central portion of Bj.! Ic ..// örpei'ö tabs (82) and are bent as limiting stops to the outside (see FIG. FIG. 9 ). 25 · The contact socket of £ # s »» qfeinem of the preceding claims, characterized g e k e · η η / η e ■ calibration fc that Hal-esterification of the biasing spring to the Buchseiikörpe? ^{3 is} so aut-gebil det that the spring element is pivotable within limits with respect to the longitudinal axis of the socket body (cf. FIG., M to 20). 26. Contact socket after a eie thereby g e k e ri η ζ e i e 3i e., the Kon Contact arms (22) have contact areas ('-18) between the ends of the dei * contact arms and the contact arms are curved both transversely and in the direction of the longitudinal center line 3098 13/06 9?