Socket for the connection of flat contact pins.

The invention relates to a contact socket for the connection of flat contact tongues. Contact systems of this type are widely in automotive applications, in power supply circuits of motor vehicles. The known contact sleeves are typically made of sheet metal strips of a width exceeding the width of the flat contact tongues by an amount which allows the lateral stripe regions by approximately 270 ° so to bend toward each other, that the strip edges at a short distance from the surface of the middle area of ​​the sheet metal strip end. When establishing a connection contact, the contact spring tongue is pressed with their lateral edges under as it were, rolled lateral stripe regions of the sheet metal strip of the female contact. Although contact sockets of this type allow a low-cost production and take up little space. The contact is allowed but mostly to be desired. For frequent insertions such contact bushes are not suitable. They can therefore not be used in plug-in devices for testing purposes, as they are used in particular in automotive construction and in repair shops, for example for fault diagnosis of motor vehicles.

A structurally simple contact socket that allows large mating cycles, without causing an adverse change in the current transfer resistance, is inventively essentially by a contact spring carrier with two substantially mutually parallel supporting walls, on which preferably two Inner page (s) each have a series of such curved contact springs is / are arranged in that the bulges directed toward one another at an introduction of a flat reed with contact making elastic aufweitender gap is formed. In this way, dependent on the number of contact springs multiple contact operation and thus a high current carrying capacity with low contact resistance, yet low insertion forces is ensured.

The contact springs may at its one, preferably that of the insertion side of the flat end facing away from the contact tongues in each case to the associated support wall by a clamping or a soldered connection to be established. A particularly simple fixation and mounting possibility arises however, if the ends of each contact spring on the outer side of the associated supporting wall towards each other bent and when the distance between the two Umbiegestellen is selected from each other by the size of the contact spring camber determining degree greater each contact spring and the distance between the carrying wall edges on which the towards each other bent ends of the contact springs rest. Due to the tendency of the contact springs to relax in its initial state with greater curvature, resulting in the assembled state as a result of spring elongation and the resulting therefrom lesser curvature firm support of the springs on the supporting wall edges and a favorable in terms of making contact with the flat contact prong preload.

Alternatively to the aforesaid clamping or soldered connection preferably at the opposite the insertion side of the flat contact tongues end according to the invention can also be provided, that the contact springs are designed as one piece then with the respectively associated support wall, is bent back on it and the respective free end of the contact springs to the corresponding carrying wall edge is bent back. In this case, the contact springs must be bent back only at one end. The assembly is characterized simple.

For further simplification can be punched together with the associated contact springs from a sheet or are each supporting wall.

Of course, supporting walls and contact springs can be stamped from a sheet of constant thickness or strength. However, its flexural rigidity are provided completely different requirements as to the contact springs in terms of, for example, to the supporting walls as supporting or holding elements. Therefore, it is preferable in the invention that the sheet metal from which the supporting wall and the associated contact springs are punched, is stepped in its strength. For example, while the portion of the sheet forming the subsequent carrying wall, be performed stronger than the later, the contact springs forming part.

When very low in terms of structure, it has been found when the two supporting walls are interconnected by a spacing of the supporting walls defining each other bulkhead. In this way it is possible to prepare the main component of the female contact forming contact spring carrier as a unitary stamped and bent part.

In a very advantageous further embodiment a the introduction gap limiting for flat reed support wall is provided on the said transverse wall remote edges of the base walls.

This retaining wall could be fixed to the edges of the support walls by a welded or soldered connection. A simpler connection arises when the support wall transversely extending away with from her, at a right angle bent retaining tabs is provided, each of which rest on the outside of one of the supporting walls and make their toward each bent ends the firm grip of the retaining wall on the contact spring carrier.

To prevent a structurally particularly simple manner, an axial displacement of the support wall relative to the contact spring carrier, it has proven to be favorable when the transverse wall is provided with a cutout, in the engage the bent ends of the holding tongues of the retaining wall.

As in their position next to one another very advantageous with regard to a proper position of the contact springs, it has been found, when the ends of the holding lugs are bent over by 180 ° and the support walls adjacent engage behind each of the cutout and if emanating from the end edge of the transverse wall end edges of the supporting walls are each provided with a recess, the start where the ends of the retaining tab expire and define that portion of the carrying wall edges on which support the bent ends of the contact springs.

The invention is further directed to a Prüfkontaktsteckvorrichtung with a plurality of through recesses for the reception and releasable fixing of contact sockets with the set forth above characteristics having insulator. This device is characterized in that each contact spring carrier has at least one obliquely assigned to the axis of the introduction of the flat contact tongue of the outside of the contact spring carrier away extending latching tongue, which engages behind an opening provided in the recess lateral locking shoulder when introduced into the associated recess of the insulating body. In this way it is possible to equip with Prüfkontaktsteckvorrichtungen arranged at a certain pitch contact spring fitted contact sockets, which also dissolve easily in case of need again and can be exchanged against new contact sockets.

It has proved to be very beneficial as in terms of structure, if at least one of the two retaining tabs of the retaining wall a locking tongue is integrally formed.

In terms of design, it is very advantageous if, in a Prüfkontaktsteckvorrichtung with one of the current lead connection projection serving the connection projection of each contact socket of the line connecting the support walls transverse wall emanates. Here, the connection projection with the fixed connection of a cable enabling crimp lugs can be provided in a variant.

If, however, a Prüfkontaktsteckvorrichtung with highly stressed contact sockets, which are to be regarded as a kind of wearing parts, the connection projection is expediently an enabling form the easily detachable connection of a connected to a contact spring connector cable, an approximately round contact pin.

Further details, advantages and features of the invention will become apparent from the following description with reference to the accompanying drawings, reference is made expressly to the respect of all not mentioned in the description essential details.

Show it:<dl id="dl0001"><dt>Fig. 1</dt><dd>a perspective view of a female contact with a provided with crimping lugs cable connection,</dd><dt>FIG. 2</dt><dd>a perspective view of a female contact to a terminal in the form of a circular contact pin,</dd><dt>Fig. 3</dt><dd>a longitudinal section through a Prüfkontaktsteckvorrichtung with female contact,</dd><dt>Fig. 4</dt><dd>a cross section through the apparatus shown in Fig. 3,</dd><dt>Fig. 5</dt><dd>a perspective view of the upper end of a contact socket according to a first embodiment of the invention,</dd><dt>Fig. 6</dt><dd>a section through the female contact according to the line VI-VI of Fig. 5,</dd><dt>Fig. 7</dt><dd>a section through the female contact according to the line VII-VII of FIG. 5,</dd><dt>Fig. 8</dt><dd>a section according to the line VIII-VIII of FIG. 5,</dd><dt>Fig. 9</dt><dd>a perspective view of the upper part of a contact socket according to a second embodiment of the invention, </dd><dt>Fig.10</dt><dd>a section through the female contact according to the line XX of Fig. 9,</dd><dt>Fig.11</dt><dd>a section through the female contact according to the line XI-XI of Fig. 9,</dd><dt>Fig.12</dt><dd>a section through the female contact according to the line XII-XII of FIG. 9 and</dd><dt>Fig.13</dt><dd>a plan view of a supporting wall with associated contact springs according to the second embodiment of the invention prior to the bending.</dd></dl>

Apparent in the drawing female contact not used to connect shown flat contact tongues, especially flat contact tabs with the customary in automobile dimensions 5.7 x 0.7 x 7.5 mm or 2.8 x 0.7 x 7.5 mm. It comprises a contact spring carrier 1 with two mutually parallel support walls 2,3, to which at least one, preferably two inner side (s) is arranged in each case a number of such curved contact springs 4 / are that of the towards one another directed bulges one at establishing a flat contact tongue is formed by contacting elastically aufweitender gap. 5 In which, in the Fig. 1 - 8 illustrated embodiment of the invention, both ends of each contact spring are 6,7 4 2,3 towards each other are bent at the outer side of the associated carrying wall. The distance between the two Umbiegestellen 8.9 each contact spring 4 from each other is set to be larger in the stretched state to the size of the contact spring camber determining degree than the distance of the supporting wall edges 10,11 on which towards each bent ends lie 6.7 of the contact springs.

The two support walls 2,3 are interconnected via a the distance of the support walls defining each other transverse wall 12th At the the transverse wall 12 remote edges 10,11 of the support walls 2,3 a the introduction gap 5 delimiting the flat reed support wall 14 is provided. The support wall 14 is extending away with transversely from her, bent at a right angle holding lugs 15,16 provided. These are in each case on the outside of one of the support walls to 2.3. With her toward each bent ends 17,18 to provide the firm support of the supporting wall 14 at the contact spring carrier 1 safely.

The transverse wall 12 is provided with a cutout 19 into which the bent ends 17,18 of the retaining tabs 15,16 of the support wall 14 engage. These ends 17,18 of the retaining tabs 15,16 are bent over by 180 ° and engage behind the carrying walls 2,3 respectively to the segment 19 adjacent. The 12 outgoing from the end edge 20 of the transverse wall front edges of the support walls 2,3 are each provided with a recess 21,22. These recesses start where the ends of the retaining tabs 15,16 expire. These cut-outs respectively define that region of the carrying wall edges 10,11 on which the bent-over ends of the contact springs 6,7 are supported 4th

From Figs. 3 and 4 is the use of the contact sockets according to the invention at a Prüfkontaktsteckvorrichtung with a plurality of through recesses 23 for the reception and releasable fixing of such female contacts having insulation body 24 produced. Each contact spring carrier 1 is provided with at least one, preferably two locking tongues 25,26. These extend obliquely away to the axis of the introduction of the 5 flat contact tongue of the outside of the contact spring carrier. 1 Upon introduction into the corresponding recess 23 of the insulating body 24, each latching tongue 25,26 engages behind an opening provided in the recess 23 of lateral locking shoulder 27,28.

From the drawing, it is apparent that the locking tongues 25, 26 are each integral with one of the two retaining tabs 15,16 of the support wall are formed fourteenth

The contact spring carrier 1 each contact socket of Prüfkontaktsteckvorrichtung is with one of the power supply serving terminal projection 29 provided. This is based on the line connecting the support walls 2,3 transverse wall 12th In the example illustrated in Fig. 1 embodiment of the connecting projection 29 is provided with crimping lugs 30 enabling the fixed terminal of a non-illustrated cable. According to the example illustrated in FIG. 2 embodiment, the connection protrusion may be formed in the form of an approximately round contact pin 31st This allows, as illustrated in Fig. 3, the readily releasable connection of a contact spring connected to a socket 32 ​​the cable, which is also not shown. In this embodiment, the cable can be together with the contact spring bushing 32 easily separated from the contact pin 31 in order then to remove the worn by frequent use of female contact from the recess 23 of the insulating body 24 and replaced by a new contact socket.

FIGS. 9 to 13 are illustrative of a second embodiment of the invention. Like reference numerals designate like elements. The second embodiment of the invention differs from the first in that the contact springs 4 'as one piece with the respective associated supporting wall 2', 3 'executed narrow tongues are formed. Referring to FIG. 12, right side, close the contact springs 4 'bent back to the supporting wall 2' on. The 11 'designated transition from the supporting wall 2' in the tongue-shaped contact spring 4 'replaces the umlegte with the end 7 of edge 11 of the support wall 2 in the first embodiment, see. In particular FIG. 8. The contact spring 4' extending along the inside of the supporting wall 2 'to which the transition 11' of opposite edge 10 '. The free end 6 'of the contact spring 4' is folded back to the supporting wall edge 10 '.

Fig. Figure 13 shows a sheet 33 in FIG. 13 upper part of the sheet 33 forms to be produced therefrom for the contact socket, the supporting wall 2 'and 3'. In the lower part a series of metal strips formed by stamping, which serve as contact springs 4 '. At 19 'is a breakthrough according to the excerpt 19 according to the first embodiment, respectively. The plate 33 may be stronger than in its lower part in its upper, later the supporting wall 2 'or 3' performing part. This allows the support walls the required stiffness and the contact springs are provided the necessary spring properties, although the supporting wall and the contact springs are each made of a single sheet metal.