Patent Description:
Plug-in connector systems which have a shielding system which is configured to allow shielding currents to flow are known from the prior art. Shielding currents can be capacitively or inductively coupled into a shield when high-frequency electric currents flow through an electrical conductor. If a first plug-in connector of a plug-in connector system is integrated, for example, into a conductive housing of an assembly, shielding currents can be conducted to a housing wall of the housing.

For this purpose, the housing wall typically has a hollow-cylindrical dome which is arranged in the region around a cutout in the housing wall. Such a dome on the housing wall can be produced by means of a die-casting process. The dome is intended to shield an electrical conductor arranged in the cutout and to divert shielding currents.

In addition to a complicated production of the housing, it may additionally be necessary for the dome to have to be processed for the purpose of safe electrical contact-connection between the dome and a shielding structure of the second plug-in connector.

Document <CIT> shows a shielded electrical plug-in connector having a connector portion comprising at least one contact element adapted to contact a mating contact element of a mating plug and a tubular shield contact member adapted to contact a mating shield contact member of the mating plug. The electrical plug-in connector comprises a shielding being in electrical contact with the tubular shield contact member. The tubular shield contact member surrounds at least a part of the at least one contact element and is electrically isolated from the at least one contact element. The shield contact member is inserted into the mating shield contact member and spring contact elements of the tubular shield contact member contact the mating shield contact member on its inner circumference.

Document <CIT> shows a shielding spring shell comprising at least one contact tab with two spring sections adjoining a fillet, wherein one of the two spring sections is configured as an at least radially resilient radial spring (<NUM>) and another of the two spring sections as an at least axially resilient axial spring. The contact tab can be supported both in the radial direction as well as in the axial direction on a mating connector and thus compensate for relative motions between a connector and the mating connector.

Document <CIT> shows a shielded connector with a smooth fitting of a pair of connectors and a large insulation distance between a terminal and a metal shell and thus improved fitting characteristics. Therefor, a rib projects over the end surface of one of a male or a female connector so that the rib lies between a metal shell projecting over the end of the male connector and a male terminal projecting over the end surface. A groove corresponds to the rib and is formed in the top end surface of the other of the male and female connectors.

Document <CIT> discloses an electrical connector assembly comprising a first electrical connector and a second electrical connector to be mated to each other, and a shield assembly comprising a first shield member having a first peripheral wall for surrounding the first electrical connector, a second shield member having a second peripheral wall for surrounding the second electrical connector, which is suitable to be inserted into the first shield member along a mating axis between an unplugged position and a plugged position and a plurality of contact elements comprising at least one first contact element and at least one second contact element for electrically connecting the first shield member and the second shield members to each other.

An object of the present invention is to provide a plug-in connector system having the features of independent claim <NUM>. This object is achieved by a plug-in connector system having the features of independent claim <NUM>. Advantageous developments are specified in dependent claims.

A plug-in connector system has a first plug-in connector and a second plug-in connector.

The first plug-in connector has an assembly housing portion and a shielding spring contact connected to the assembly housing portion. The second plug-in connector has a shielding housing connected to the shielding spring contact. The assembly housing portion has a bottom side and a first passage opening. The shielding spring contact has a flat base portion and a shielding portion. The base portion has a top side and a cutout. The shielding portion of the shielding spring contact further has a wall connected to the base portion and encircling the cutout. The wall has an outer side, an inner side, an upper side and a lower side. The wall is arranged, by way of its lower side, on the top side of the base portion in such a way that the lower side of the wall laterally surrounds the cutout in the base portion. The shielding housing of the second plug-in connector has a shielding housing wall with a second passage opening facing the assembly housing portion. The shielding spring contact bears, by way of the top side of the base portion, against the bottom side of the assembly housing portion. The shielding portion of the shielding spring contact projects through the first passage opening in the assembly housing portion. The shielding portion also projects through the second passage opening in the shielding housing wall into the shielding housing and bears against the shielding housing wall in the region of the second passage opening.

The shielding spring contact advantageously renders possible simple production of the assembly housing portion since production of an assembly housing portion with a dome is dispensed with. In addition, no subsequent processing of a dome of the assembly housing portion is necessary, as a result of which the assembly housing portion, the first plug-in connector and the plug-in connector system can be produced more simply. The plug-in connector system is therefore based on the assembly housing portion not having a dome but instead the shielding spring contact, which projects through the passage opening in the assembly housing portion and is electrically and mechanically connected to it, being used.

In one embodiment, the wall of the shielding spring contact is of conical configuration at least in portions and tapers in the direction away from the base portion. In this way, a wedge effect can advantageously be created in the plug-in connector system, as a result of which the electrical and mechanical contact between the shielding spring contact and the shielding housing of the second plug-in connector can be improved.

In one embodiment, a metal coating is arranged on the outer side of the wall at least in portions. The metal coating can advantageously improve the electrical contact between the shielding spring contact and the shielding housing of the second plug-in connector. The metal coating can be arranged on the outer side of the wall by means of an electrochemical process for example. As an alternative, the metal coating can be arranged by roll cladding.

In one embodiment, the shielding portion is widened in the region between the upper side and the lower side at least in portions. The widened wall can advantageously improve the electrical and mechanical contact between the shielding spring contact and the shielding housing of the second plug-in connector.

In one embodiment, the metal coating is arranged in the region of the widened portion. The metal coating arranged in the widened portion can advantageously improve the electrical contact between the shielding spring contact and the shielding housing of the second plug-in connector.

In one embodiment, a fixing structure is arranged on the outer side of the wall and in the region of the lower side. The fixing structure advantageously renders it possible for the shielding spring contact to become wedged in the assembly housing portion, as a result of which the shielding spring contact and the assembly housing portion are particularly robustly mechanically and electrically connected to one another.

In one embodiment, the wall is, at least in portions, of slotted configuration along a direction running perpendicular to the base portion.

In one embodiment, the base portion is of annular disc-like configuration or comprises a plurality of annular disc segments. For this purpose, the base portion is intended to bear against the assembly housing portion, as a result of which reliable electrical contact between the shielding spring contact and the assembly housing portion is created.

A first plug-in connector has an assembly housing portion and a shielding spring contact connected to the assembly housing portion. The assembly housing portion has a bottom side and a first passage opening. The shielding spring contact has a flat base portion and a shielding portion. The base portion has a top side and a cutout. The shielding portion of the shielding spring contact has a wall connected to the base portion and encircling the cutout. The wall has an outer side, an inner side, an upper side and a lower side. The wall is arranged, by way of its lower side, on the top side of the base portion in such a way that the lower side of the wall laterally surrounds the cutout in the base portion. The shielding spring contact bears, by way of the top side of the base portion, against the bottom side of the assembly housing portion. The shielding portion of the shielding spring contact projects through the first passage opening in the assembly housing portion. The shielding portion is configured to project through the second passage opening in the shielding housing wall into the shielding housing of the second plug-in connector of the plug-in connector system according to one of the abovementioned embodiments and to bear against the shielding housing wall in the region of the second passage opening.

A shielding spring contact has a flat base portion and a shielding portion. The base portion has a top side and a cutout. The shielding portion has a wall connected to the base portion and encircling the cutout. The wall has an outer side, an inner side, an upper side and a lower side. The wall is arranged, by way of its lower side, on the top side of the base portion in such a way that the lower side of the wall laterally surrounds the cutout in the base portion. The base portion is configured to bear, by way of its top side, against the bottom side of the assembly housing portion of the first plug-in connector. The shielding portion is configured to project through the first passage opening in the assembly housing portion of the first plug-in connector. The shielding portion is configured to project through the second passage opening in the shielding housing wall into the shielding housing of the second plug-in connector of the plug-in connector system according to one of the embodiments and to bear against the shielding housing wall in the region of the second passage opening.

The shielding spring contact can contain the features described in conjunction with the various embodiments of the plug-in connector system per se and irrespective of whether it is a constituent part of the plug-in connector system or the first plug-in connector.

The invention will be explained in more detail below with reference to diagrammatic fig-ures, in which:.

<FIG> shows a diagrammatic cross-sectional view through a plug-in connector system <NUM>. The plug-in connector system <NUM> can be configured, for example, as a high-voltage plug-in connection and can be, for example, a constituent part of a motor vehicle, for example of an electric vehicle or of a hybrid vehicle, but this is not absolutely necessary.

The plug-in connector system <NUM> has a first plug-in connector <NUM> and a second plug-in connector <NUM> which are plugged together in the plug-in connector system <NUM>. The first plug-in connector <NUM> is configured as a socket. The second plug-in connector <NUM> is configured as a plug. The second plug-in connector <NUM> is, by way of example, of angled configuration, as a result of which the plug-in connector system <NUM> is also of angled configuration. However, the second plug-in connector <NUM> can also be of straight configuration. The plug-in connector system <NUM> can have any desired number of poles. The view in <FIG> therefore shows the cross-sectional view through one pole of the plug-in connector system <NUM>.

The second plug-in connector <NUM> has a second electrical conductor <NUM>. The second electrical conductor <NUM> can contain any desired metal, for example copper. The second electrical conductor <NUM> can be configured as an individual strand or contain a large number of strands which can be twisted together for example. The second electrical conductor <NUM> is embedded into a first insulation <NUM>. The first insulation <NUM> contains a dielectric plastic. A shield <NUM> is arranged on the first insulation <NUM>. The shield <NUM> contains a metal, for example tin-plated copper, and is intended to shield the second electrical conductor <NUM>. The shield <NUM> can be configured as a shielding braid for example. The second electrical conductor <NUM> and the shield <NUM> are arranged concentrically. In a plane running perpendicular to the sectional plane of <FIG>, the second electrical conductor <NUM> has a circular cross section and the shield <NUM> has an annular cross section. However, the second electrical conductor <NUM> and the shield <NUM> can also be shaped differently. A second insulation <NUM>, which likewise contains a dielectric plastic, is arranged on the shield <NUM>. The first and the second insulation <NUM>, <NUM> can contain, for example, polyvinyl chloride (PVC), polyethylene (PE), rubber or polyurethane (PUR). The second conductor <NUM>, the first insulation <NUM>, the shield <NUM> and the second insulation <NUM> form a cable <NUM>.

The second plug-in connector <NUM> has a second contact structure <NUM>. The second contact structure <NUM> contains a metal. The second contact structure <NUM> has a connecting portion <NUM> which is electrically and mechanically connected to the second electrical conductor <NUM>. The second contact structure <NUM> further has a contact portion <NUM> electrically and mechanically connected to the connecting portion <NUM>, wherein the portions <NUM>, <NUM> of the second contact structure <NUM> can be monolithically connected to one another, that is to say the second contact structure <NUM> can be configured in one piece, but this is not necessary. The contact portion <NUM> is configured, by way of example, as a contact sleeve. However, the contact portion <NUM> can also be configured as a contact pin.

The second plug-in connector <NUM> has a housing <NUM>. The cable <NUM> projects into the housing <NUM>. The housing <NUM> can contain a plastic for example. The second plug-in connector <NUM> further has a shielding housing <NUM> which contains a metal, for example a copper alloy such as brass, or steel for example. The shielding housing <NUM> is arranged within the housing <NUM>. The shielding housing <NUM> is electrically and mechanically connected to the shield <NUM>. The cable <NUM> projects through a first opening <NUM> in the housing <NUM> into the housing <NUM>. A second seal <NUM> is arranged in the region of the first opening <NUM> and seals off a region between the housing <NUM> and the cable <NUM>. The second electrical conductor <NUM> of the cable <NUM> projects through a second opening <NUM> in the shielding housing <NUM> into the shielding housing <NUM>. The second contact structure <NUM> is arranged in the shielding housing.

The first plug-in connector <NUM> has an assembly housing portion <NUM> and a shielding spring contact <NUM>. The shielding spring contact <NUM> is electrically connected to the assembly housing portion <NUM>. In the plug-in connector system <NUM>, the shielding spring contact <NUM> is electrically connected to the shielding housing <NUM>. The assembly housing portion <NUM> and the shielding spring contact <NUM> of the first plug-in connector <NUM> form, together with the shielding housing <NUM> of the second plug-in connector <NUM> and the shield <NUM>, a shielding system <NUM> of the plug-in connector system <NUM>. <FIG> diagrammatically shows a perspective cross-sectional view through the shielding system <NUM> of the plug-in connector system <NUM> of <FIG>. Other constituent parts of the plug-in connector system <NUM> and the shield <NUM> of the shielding system <NUM> are not illustrated in <FIG> for reasons of clarity.

The assembly housing portion <NUM> has a first top side <NUM> and a first bottom side <NUM> situated opposite the first top side <NUM>. Furthermore, the assembly housing portion <NUM> has a first passage opening <NUM>. The shielding spring contact <NUM> has a flat base portion <NUM> and a shielding portion <NUM>. The flat base portion <NUM> has a second top side <NUM>, a bottom side <NUM> situated opposite the second top side <NUM>, and a cutout <NUM>. The shielding spring contact <NUM> bears, by way of the second top side <NUM> of the base portion <NUM>, against the first bottom side <NUM> of the assembly housing portion <NUM> and in this way is electrically connected to the assembly housing portion <NUM>.

The shielding portion <NUM> of the shielding spring contact <NUM> has a wall <NUM> connected to the base portion <NUM> and encircling the cutout <NUM>. The wall <NUM> has an outer side <NUM>, an inner side <NUM>, an upper side <NUM> and a lower side <NUM>. The wall <NUM> is arranged, by way of its lower side <NUM>, on the second top side <NUM> of the base portion <NUM> in such a way that the lower side <NUM> of the wall <NUM> laterally surrounds the cutout <NUM> in the base portion <NUM>. The shielding portion <NUM> of the shielding spring contact <NUM> projects through the first passage opening <NUM> in the assembly housing portion <NUM>. In the region of the first passage opening <NUM>, the shielding portion <NUM> bears, by way of the outer side <NUM> of its wall <NUM>, against the assembly housing portion <NUM>.

The shielding housing <NUM> of the second plug-in connector <NUM> has a shielding housing wall <NUM> with a second passage opening <NUM> facing the assembly housing portion <NUM>. In the shielding system <NUM> of the plug-in connector system <NUM>, the shielding portion <NUM> projects through the second passage opening <NUM> in the shielding housing wall <NUM> into the shielding housing <NUM> and, in the region of the second passage opening <NUM>, bears, by way of the outer side <NUM> of its wall <NUM>, against the shielding housing wall <NUM>, as a result of which the shielding portion <NUM> is electrically connected to the shielding housing <NUM>. In this case, the wall <NUM> is configured in a manner running obliquely with respect to the shielding housing wall <NUM>.

The plug-in connector system <NUM> is explained below with reference to <FIG>. The first plug-in connector <NUM> has a header <NUM>. The header <NUM> contains at least one plastic for example. The header <NUM> has a portion which bears both against the first bottom side <NUM> of the assembly housing portion <NUM> and against the second bottom side <NUM> of the base portion <NUM> of the shielding spring contact <NUM>. In addition, the header <NUM> has a portion <NUM> which projects through the first passage opening <NUM> in the assembly housing portion <NUM> and bears against the inner side <NUM> of the wall <NUM> of the shielding portion <NUM>. The portion <NUM>, projecting through the first passage opening <NUM>, of the header <NUM> projects, by way of example, beyond the wall <NUM> of the shielding portion <NUM> in the illustration of <FIG>.

The first plug-in connector <NUM> has a first contact structure <NUM>. The first contact structure <NUM> contains a metal and is configured, merely by way of example, as a double sleeve.

The first contact structure <NUM> of the first plug-in connector <NUM> projects through the first passage opening <NUM> in the assembly housing portion <NUM>. In the plug-in connector system <NUM>, the first contact structure <NUM> projects into the shielding housing <NUM> of the second plug-in connector <NUM>. The first contact structure <NUM> bears, by way of an outer side, against an inner side of the portion <NUM> of the header <NUM>.

The first contact structure <NUM> is electrically and mechanically connected to the second contact structure <NUM> in the plug-in connector system <NUM>. In the exemplary embodiment of the plug-in connector system <NUM> of <FIG>, the second contact structure <NUM>, configured as a contact sleeve, of the second plug-in connector <NUM> projects at one end into the first contact structure <NUM>, configured as a double sleeve, of the first plug-in connector <NUM>. In this way, the first contact structure <NUM> is electrically connected to the second electrical conductor <NUM> of the second plug-in connector <NUM>.

For the purpose of fixing the first contact structure <NUM>, the header <NUM> has a further portion <NUM> which likewise projects through the first passage opening <NUM> in the assembly housing portion <NUM>. This further portion <NUM> projects through the first contact structure <NUM> and bears against an inner side of the first contact structure <NUM>. In this way, the first contact structure <NUM> is stabilized in the first plug-in connector <NUM>. The further portion <NUM> also projects, by way of example, into the second contact structure <NUM> configured as a sleeve. In this way, the connection comprising the first contact structure <NUM> and the second contact structure <NUM> is fixed and stabilized.

The first plug-in connector <NUM> can have a first electrical conductor which is electrically and mechanically connected to the first contact structure <NUM>. The first electrical conductor is not illustrated in <FIG> for reasons of simplicity. The first electrical conductor can be arranged on a side of the first contact structure <NUM> averted from the second contact structure <NUM>. In this way, the first electrical conductor <NUM>, the first contact structure <NUM>, the second contact structure <NUM> and the second electrical conductor <NUM> are electrically connected to one another in the plug-in connector system <NUM>.

The header <NUM> has an attachment <NUM> arranged above the assembly housing portion <NUM>. A seal <NUM> is arranged in a region around the shielding spring contact <NUM>. The seal <NUM> is configured to seal off a region between the housing <NUM> of the second plug-in connector <NUM> and the attachment <NUM> of the first plug-in connector <NUM>. In addition, the attachment <NUM> can also have structures for receiving and fixing the housing <NUM> of the second plug-in connector <NUM>. In this way, the first plug-in connector <NUM> and the second plug-in connector <NUM> are securely connected to one another.

The first plug-in connector <NUM> can be integrated, for example, into an assembly housing of an electrical assembly, wherein the assembly housing portion <NUM> is a constituent part of a wall of the assembly housing. However, the first plug-in connector <NUM> can also be configured, for example, as a connector strip which can be fitted, for example, to the assembly housing. In this case, the first plug-in connector <NUM> can be fixed, by way of the assembly housing portion <NUM>, to a wall of the assembly housing. In both cases, shielding currents can flow away across the assembly housing portion <NUM> to the assembly housing.

The shielding system <NUM> of the plug-in connector system <NUM> is configured to electromagnetically shield the first electrical conductor <NUM>, the first contact structure <NUM> and the second contact structure <NUM>. The second electrical conductor <NUM> is shielded by the shield <NUM> of the cable <NUM>. The shielding spring contact <NUM> of the first plug-in connector <NUM> is intended to shield a transition region between the assembly housing portion <NUM> of the first plug-in connector <NUM> and the shielding housing <NUM> of the second plug-in connector. In this case, the wall <NUM> of the shielding portion <NUM> of the shielding spring contact <NUM> is configured to shield the first contact structure <NUM> in the region between the assembly housing portion <NUM> and the shielding housing <NUM>.

If a voltage is applied to the system comprising the first electrical conductor <NUM>, the first contact structure <NUM>, the second contact structure <NUM> and the second electrical conductor <NUM>, shielding currents can be capacitively and/or inductively coupled into the shield <NUM>, the shielding housing <NUM> and the wall <NUM> of the shielding spring contact <NUM>. The shielding currents can advantageously flow away across the wall <NUM> of the shielding spring contact <NUM> and across its base portion <NUM> to the assembly housing portion <NUM>, as a result of which an interfering influence of the shielding currents can be avoided.

<FIG> diagrammatically shows a perspective view of the shielding spring contact <NUM> of the first plug-in connector <NUM> and, respectively, of the plug-in connector system <NUM> of <FIG>. The shielding spring contact <NUM> can be produced, for example, by means of a deep-drawing process from a metal sheet.

The base portion <NUM> is of annular disc-like configuration by way of example. As an alternative, the base portion <NUM> can also comprise a plurality of annular disc segments which are securely connected to the wall <NUM>. The shielding spring contact <NUM> is of conical or hollow truncated cone-like configuration at least in portions. In this case, the wall <NUM> tapers in a direction away from the base portion <NUM>. The shielding spring contact <NUM> of conical form at least in portions has the advantage that it causes a wedging effect in the first plug-in connector <NUM> and, respectively, in the plug-in connector system <NUM>, as a result of which the shielding spring contact can be electrically and mechanically connected to the assembly housing portion <NUM> and the shielding housing wall <NUM> of the shielding housing <NUM> in a reliable manner. However, the wall <NUM> of the shielding spring contact <NUM> does not necessarily have to be of conical configuration in portions. The shielding spring contact <NUM> can also be of entirely hollow-cylindrical configuration for example.

A fixing structure <NUM> is arranged on the outer side <NUM> of the wall and in the region of the lower side <NUM>. In <FIG>, the fixing structure <NUM> is embodied, by way of example, as a toothing <NUM>. In this case, a plurality of teeth are arranged on the outer side <NUM> of the wall <NUM>, in the region of the lower side <NUM> and encircling the wall <NUM>. In the first plug-in connector <NUM> and, respectively, in the plug-in connector system <NUM>, the toothing <NUM> causes the shielding spring contact <NUM> and the assembly housing portion <NUM> to be reliably connected to one another since the toothing <NUM> is configured to become wedged in the assembly housing portion <NUM> in the region of the first passage opening <NUM>. However, the fixing structure <NUM> does not necessarily have to be embodied as a toothing <NUM>. The fixing structure <NUM> can also be entirely dispensed with.

The wall <NUM> of the shielding spring contact according to <FIG> is, at least in portions, of slotted configuration along a direction running perpendicular to the base portion <NUM>. As a result, the wall <NUM> has, at least in portions, webs <NUM> which are arranged along the direction running perpendicular to the base portion <NUM> and around the wall <NUM>. As a result, the shielding spring contact <NUM> can be of more flexible and more elastic configuration. The webs <NUM> in the wall <NUM> can be produced, for example, by means of a punching process. However, the wall <NUM> does not have to be of slotted configuration.

<FIG> diagrammatically shows a perspective view of a shielding spring contact <NUM> according to a further embodiment. The shielding spring contact <NUM> of <FIG> represents an alternative embodiment for the first plug-in connector <NUM> and, respectively, the first plug-in connector system <NUM>. The shielding spring contacts <NUM> of <FIG> and <FIG> have similarities. Similar and identical elements of the shielding spring contacts <NUM> are provided with the same reference signs. Only the differences in the shielding spring contacts <NUM> are explained in the following description. Notwithstanding the differences, the description of the shielding spring contact <NUM> of <FIG> also applies to the shielding spring contact <NUM> of <FIG>.

The shielding spring contact <NUM> of <FIG> is of hollow-cylindrical, and not conical, configuration. The shielding spring contact <NUM> of <FIG> also has a fixing structure <NUM>. However, the fixing structure <NUM> is not configured as a toothing <NUM>, but rather has fins <NUM> which are arranged on the outer side <NUM> of the wall <NUM> and project obliquely away from the wall <NUM>.

In contrast to the shielding spring contact <NUM> of <FIG>, the shielding spring contact <NUM> of <FIG> does not have a base portion <NUM> of annular disc-like configuration, but rather a base portion <NUM> which comprises annular disc segments <NUM> which are connected to the wall <NUM>. The shielding spring contact <NUM> of <FIG> can be produced, for example, by means of a punching process in combination with a shaping process. After a metal is punched, it can be shaped, for example, by means of a cylindrically or alternatively conically shaped drum in such a way that an encircling wall <NUM> is created.

The punching process can also comprise punching the fins <NUM>. The fins <NUM> can then be reshaped in such a way that they project obliquely outwards from the wall <NUM>. The punching process can also comprise punching the webs <NUM>. In the exemplary embodiment of <FIG>, the shielding spring contact <NUM> also has, in addition to the webs <NUM>, further webs <NUM> which can likewise be produced by punching. The further webs <NUM> are securely connected to the wall <NUM> only on a side facing the upper side <NUM> of the wall <NUM>. On the contrary, the further webs <NUM> are not connected to the wall <NUM> on a side facing the lower side <NUM>. However, the webs <NUM> and further webs <NUM> can also be dispensed with.

The shielding spring contact <NUM> of <FIG> has a curved portion <NUM> in the region between the upper side <NUM> and the lower side <NUM>. The shielding spring contact <NUM> is therefore of widened configuration at least in portions in the region between the upper side <NUM> and the lower side <NUM> and has an increased diameter within this region. The shielding spring contact <NUM> of <FIG> can also have such a curved portion <NUM>. Merely by way of example, the curved portion <NUM> is of encircling configuration. The curved portion <NUM> can make it possible to improve electrical and mechanical contact between the shielding portion <NUM> and the shielding housing <NUM>. The curved portion <NUM> can also be dispensed with.

The shielding portion <NUM> of the shielding spring contact <NUM> of <FIG> comprises a metal coating <NUM>. The metal coating <NUM> is arranged, at least in portions, on the outer side <NUM> of the wall <NUM>. By way of example, the metal coating <NUM> is arranged in the region of the webs <NUM> and in the region of the curved portion <NUM>, this not being absolutely necessary. For example, the metal coating <NUM> can also be arranged on the further webs <NUM> and/or outside the webs <NUM> or outside the further webs <NUM> on the outer side <NUM> of the wall <NUM>. The metal coating <NUM> can contain, for example, silver or gold or another metal and is intended to additionally improve the electrical and mechanical contact between the shielding portion <NUM> and the shielding housing <NUM>. The shielding spring contact <NUM> of <FIG> can also have a metal coating <NUM> which can likewise be arranged in the region of a curved portion <NUM> or in another region on the outer side <NUM> of the wall <NUM>. The metal coating <NUM> can also be dispensed with.

<FIG> diagrammatically shows a cross-sectional view through a plug-in connector system <NUM> according to the prior art. The known plug-in connector system <NUM> has similarities to the plug-in connector system <NUM> of <FIG>. Similar elements are provided with identical reference signs.

In contrast to the plug-in connector system <NUM> of <FIG>, the known plug-in connector system <NUM> does not have a shielding spring contact <NUM>. Instead, the plug-in connector system <NUM> has a dome <NUM>. The dome <NUM> and the assembly housing portion <NUM> are monolithically connected to one another in the known plug-in connector system <NUM>. The dome <NUM> is of hollow-cylindrical configuration, arranged on the first top side <NUM> of the assembly housing portion <NUM> and laterally surrounds the first passage opening <NUM> in the assembly housing portion <NUM>. The dome <NUM> is electrically and mechanically connected to the shielding housing <NUM> of the second plug-in connector <NUM>.

On account of the assembly housing portion <NUM> and the dome <NUM> being configured in one piece, a method for producing the assembly housing portion <NUM> is relatively complicated. Furthermore, it may be the case that the dome <NUM> additionally has to be processed in order to be able to ensure electrical contact-connection with the shielding housing <NUM>. In comparison to this, the shielding spring contact <NUM> renders possible relatively simple production of the assembly housing portion <NUM> and therefore also relatively simple production of the first plug-in connector <NUM> and, respectively, of the plug-in connector system <NUM>. In addition, an extremely wide variety of embodiments of the shielding spring contact <NUM>, which have been explained above, can have a range of further advantageous technical effects.

Claim 1:
Plug-in connector system (<NUM>) comprising a first plug-in connector (<NUM>) and a second plug-in connector (<NUM>),
wherein the first plug-in connector (<NUM>) has an assembly housing portion (<NUM>) and a shielding spring contact (<NUM>) connected to the assembly housing portion (<NUM>), and the second plug-in connector (<NUM>) has a shielding housing (<NUM>) connected to the shielding spring contact (<NUM>),
wherein the assembly housing portion (<NUM>) has a bottom side (<NUM>) and a first passage opening (<NUM>),
wherein the shielding spring contact (<NUM>) has a flat base portion (<NUM>) and a shielding portion (<NUM>),
wherein the base portion (<NUM>) has a top side (<NUM>) and a cutout (<NUM>),
wherein the shielding portion (<NUM>) of the shielding spring contact (<NUM>) has a wall (<NUM>) connected to the base portion (<NUM>) and encircling the cutout (<NUM>),
wherein the wall (<NUM>) has an outer side (<NUM>), an inner side (<NUM>), an upper side (<NUM>) and a lower side (<NUM>),
wherein the wall (<NUM>) is arranged, by way of its lower side (<NUM>), on the top side (<NUM>) of the base portion (<NUM>) in such a way that the lower side (<NUM>) of the wall (<NUM>) laterally surrounds the cutout (<NUM>) in the base portion (<NUM>),
wherein the shielding housing (<NUM>) of the second plug-in connector (<NUM>) has a shielding housing wall (<NUM>) with a second passage opening (<NUM>) facing the assembly housing portion (<NUM>),
wherein the shielding spring contact (<NUM>) bears, by way of the top side (<NUM>) of the base portion (<NUM>), against the bottom side (<NUM>) of the assembly housing portion (<NUM>), wherein the shielding portion (<NUM>) of the shielding spring contact (<NUM>) projects through the first passage opening (<NUM>) in the assembly housing portion (<NUM>),
characterized in that the shielding portion (<NUM>) projects through the second passage opening (<NUM>) in the shielding housing wall (<NUM>) into the shielding housing (<NUM>) and bears against the shielding housing wall (<NUM>) in the region of the second passage opening (<NUM>).