DE102022207169A1 - Ancillary unit of a motor vehicle - Google Patents

Abstract

The invention relates to an auxiliary unit for a motor vehicle, in particular an electric refrigerant compressor, having an electronics compartment (2) with electronics (6) accommodated therein, and an electrical interface (10) attached to the electronics compartment (2) for electrically contacting a connection plug with the electronics (6), the electronics (6) having a circuit board (4) and a contact element (26, 26'), the contact element (26, 26') having an electronics contact (28, 28') designed as a stamped part, which in a contact carrier (30, 30') designed as an overmolding, the contact carrier (30, 30') being plug-mounted vertically with the circuit board (4), a contact tab (32) of the electronics contact (28, 28') being made from the contact carrier (30, 30'), the interface (10) having at least one connecting contact (14) designed as a stamped part, which is accommodated in a contact carrier (12) designed as an overmolding, the connecting contact (14) having a plug-in side facing the connecting plug (15) and with a base side (16) facing the electronics contact (28, 28') protruding from the contact holder (12) on both sides, and the base side (16) with the contact tab (32) being oriented parallel to the circuit board (4). Plug-in direction is directly connected.

Description

The invention relates to an auxiliary unit of a motor vehicle, in particular an electric refrigerant compressor, having an electronics compartment with electronics accommodated therein, and an electrical interface attached to the electronics compartment for electrically contacting a connection plug with the electronics. The invention further relates to a contact system for such an auxiliary unit.

In the automobile and motor vehicle sector, the components of the motor vehicle are differentiated, for example, into main units and auxiliary units. A skin unit is here understood to mean, in particular, a component which enables locomotion or propulsion of the motor vehicle, with an auxiliary unit being understood in particular to mean those (auxiliary and additional) components which are not directly involved in the locomotion or propulsion of the motor vehicle are. An auxiliary unit is understood to mean, for example, a (refrigerant) compressor, an oil or fluid pump, an adjusting drive or the like.

Air conditioning systems are regularly installed in motor vehicles, which air-condition the vehicle interior using a system that forms a refrigerant circuit. Such systems basically have a circuit in which a refrigerant is carried. The refrigerant, for example R-134a (1,1,1,2-tetrafluoroethane) or R-744 (carbon dioxide), is heated on an evaporator and compressed using an auxiliary unit in the form of a (refrigerant) compressor, whereby the refrigerant then absorbed heat is released via a heat exchanger before it is fed back to the evaporator via a throttle.

In such applications, scroll machines are in principle possible as compressors for the refrigerant. Such scroll compressors typically have two scroll parts that are movable relative to one another and operate in the manner of a positive displacement pump. The two scroll parts are typically designed as a nested (helical) pair of spirals or scrolls. This means that one of the spirals at least partially engages with the other spiral. The first (spiral) scroll is fixed in relation to a compressor housing (stationary scroll, fixed scroll), while the second (spiral) scroll (moving scroll, orbiting scroll) is orbitally driven within the first scroll by means of an electric motor.

The electric motor is connected to (motor) electronics for regulation and/or control. The electric motor is usually designed to be brushless, with the alternating current intended to supply the stator winding usually being generated by an electronics converter (inverter). In smaller electric motors, this converter, together with associated control electronics, is often housed in an electronics compartment that is integrated into the motor housing. The electronics compartment has, for example, a housing connection area in the form of an electrical interface for electrically contacting the electronics.

The interface is intended and set up to contact the electronics, in particular a connection or pin contact, to a vehicle electrical system. The interface is designed on the vehicle electrical system side for electrical connection to a connection plug, in particular a customer plug. The interface generally has at least one connection contact, which is designed on the vehicle electrical system side as a pin or plug contact for the plug connection to the connection plug. The electronics side of the connection contact is conventionally designed as a crimp contact for a wire connection crimped therewith, the wire connection being contacted with the connection contact of the electronics. For this purpose, the wire connection is carried out, for example, with a plug connector, in particular with an Erni plug connector, which is manually plugged into the connection contact. The connection contact is expediently also designed as a plug connector, in particular as an Erni plug connector, so that two (Erni) plug connectors and a crimped wire connection as well as manual assembly effort are necessary to contact the interface to the electronics. This makes contacting the electronics comparatively complex and cost-intensive.

The invention is based on the object of specifying a particularly suitable auxiliary unit for a motor vehicle. In particular, an auxiliary unit with a particularly low contacting effort should be specified. The invention is also based on the object of specifying a particularly suitable contact system for such an auxiliary unit.

With regard to the auxiliary unit, the task is solved according to the invention with the features of claim 1 and with regard to the contact system with the features of claim 11. Advantageous refinements and further developments are the subject of the subclaims. The advantages and configurations mentioned with regard to the auxiliary unit can also be applied to the contact system and vice versa.

The auxiliary unit according to the invention is intended for use in a motor vehicle and is suitable and set up for this purpose. The electric or electromotive auxiliary unit is designed in particular as an electric refrigerant drive. For example, the refrigerant drive is part of a vehicle air conditioning system or vehicle air conditioning. The auxiliary unit has an electronics compartment as an electronics housing, in which electronics, for example for controlling an electric motor of the refrigerant drive, are arranged. An electrical interface for connecting or contacting the electronics to a connector is attached to the electronics compartment. The interface is therefore designed in particular as an electrical housing feedthrough through the housing wall of the electronics compartment in order to realize an electrically conductive connection between the contacts of the connection plug and the electronics. The connection plug is in particular a customer plug which is connected to a (motor vehicle) on-board electrical system.

The interface is designed, for example, as a low-voltage interface to supply the electronics with control or interlock signals. Low voltage is understood to mean in particular a voltage range of less than 60 V, for example 12 V.

The electronics have a printed circuit board (PCB). The circuit board is in particular equipped with electrical components of the auxiliary unit, in particular with an inverter circuit for controlling an electric motor of the auxiliary unit. The electronics here have a contact element for electrical connection to the interface.

The contact element and the interface form a contact system of the auxiliary unit.

The contact element has at least one electronic contact designed as a stamped part, which is accommodated in a contact carrier designed as an overmolding. The contact carrier is made of an electrically insulating and mechanically stable plastic.

The electronic contact protrudes from the contact carrier on both sides in the direction of the circuit board and in the direction of the interface, with the interface-side part of the electronic contact being designed as a contact lug. The contact tab is designed, for example, as a pin contact. A pin contact is here understood to mean in particular a pin contact, a knife contact or a flat contact, i.e. a single-wire plug connection, which is connected or can be connected on the free end to a socket or a plug base.

The contact carrier is mounted vertically on the circuit board. In other words, the contact element or the contact carrier and the circuit board are intended for a particularly detachable plug connection, for example a press fit connection or snap connection (clip connection, snap connection), and are suitable and set up for this purpose. This means that the contact carrier is attached to the circuit board in a positive and/or non-positive manner, at least in the vertical direction.

The conjunction “and/or” is to be understood here and below in such a way that the features linked by this conjunction can be formed both together and as alternatives to one another.

A “positive connection” or a “positive connection” between at least two interconnected parts is understood here and below in particular to mean that the cohesion of the interconnected parts is achieved at least in one direction by direct interlocking of contours of the parts themselves or by indirect interlocking via an additional connecting part. The “blocking” of mutual movement in this direction is therefore dependent on the form.

A “non-positive connection” or a “non-positive connection” between at least two interconnected parts is understood here and in the following in particular to mean that the interconnected parts are prevented from slipping against one another due to a frictional force acting between them. If there is no “connecting force” that causes this frictional force (this means the force that presses the parts against each other, for example a screw force or the weight itself), the frictional connection cannot be maintained and can therefore be released.

For example, the circuit board-side section of the electronic contact is designed as a plug-in contact or as a press-fit contact, which is inserted or pressed into electrical contact in corresponding contact openings of the circuit board in the course of the vertical snap-in fastening of the contact carrier.

The interface has at least one connecting contact designed as a stamped part or stamped grid, which is accommodated in a contact holder designed as an overmolding. The connection contact protrudes from one of the connections plug side facing the plug (connection side) on the one hand and with a base side facing the electronics contact out of the contact holder on both sides. According to the invention, the base side is directly, i.e. directly, plug-connected to the electronics contact of the electronics, with the base side making plug-in contact with the contact lug along a plug-in direction oriented parallel to the circuit board.

This creates a particularly suitable auxiliary unit. In particular, the base side eliminates the need for an additional wire connection and crimp connection. In addition, the contact element eliminates the need for a wire connection and two (Erni) connectors. Furthermore, the vertical plug-in mounting of the contact element on the circuit board enables simple, automated assembly and contacting of the contact element with the circuit board. Furthermore, the plug-in contact of the connection contact with the contact lug also enables a corresponding automated connection, so that the interconnection of the interface with the electronics can be implemented automatically without manual intervention. This advantageously reduces the contacting effort and assembly costs of the auxiliary unit.

In an advantageous development, the interface has a number of connection contacts, with the contact element having a corresponding number of electronic contacts. In particular, the interface has exactly three connection contacts and the plug connector has exactly three electronic contacts. The interface is designed, for example, as a low-voltage interface for supplying the electronics with control or interlock signals. Two of the connection contacts of the interface are contacted or can be contacted by the connection plug with a vehicle battery (KL30, KL31), with the third connection contact being led or can be led to a communication line (COM). Through the interface and the contact element, a low-voltage connection in particular is realized on the connection plug or on the vehicle electrical system.

In a suitable embodiment, the contact element or the interface has a uniform pitch. The term “pitch” refers to the distance (pitch) between the contact tabs or connecting contacts. The distance between adjacent electronic contacts is preferably dimensioned to be the same size. In particular, the distance is dimensioned to 4 mm. The contact element is therefore designed as a 4 mm pitch connector.

An additional or further aspect of the invention provides that a partition wall is formed on the contact carrier between two adjacent electronic contacts. The partition wall is here in particular integrally formed, i.e. in one piece or monolithic, onto the contact carrier. The partition wall provides reliable and safe electrical insulation between the electronic contacts, and in particular the risk of an unwanted electrical short circuit between the electronic contacts is advantageous and easily avoided.

In a conceivable embodiment, a longitudinal direction of the contact tab, i.e. the direction along the largest contact tab dimension, is oriented parallel to the circuit board. In other words, the contact tab is essentially oriented horizontally, i.e. aligned coaxially with the plug-in direction for contacting the connection contact.

In an expedient embodiment, at least two resilient locking hooks are arranged on the contact carrier, by means of which the contact carrier is locked in locking openings in the circuit board. The locking hooks are preferably arranged in pairs and each have a locking lug on the free end, by means of which the edge of the locking openings is gripped behind in the locked state.

For example, a separate latching element is attached to the contact carrier with the latching hooks. In a preferred embodiment, however, the locking hooks are integrally formed, i.e. in one piece or monolithic, onto the contact carrier. This results in a contact element with reduced components, so that assembly is further simplified.

In an advantageous embodiment, the base side is designed as a contact fork with two contact prongs, between which the electronic contact is enclosed in a positive and/or non-positive manner. The contact prongs, for example, resiliently face each other, with the electronic contact sitting between them bending the contact prongs away from each other, so that the resulting restoring force creates an operationally safe and reliable contact pressure - and thus electrical contact - between the base side and the electronic contact.

In a preferred embodiment, each contact prong rests on the electronics contact along a contact length between 1 mm (millimeter) and 2 mm, in particular between 1.5 mm and 1.9 mm, preferably at least 1.7 mm, for example 1.77 mm. This results in a comparatively large system or contact with the electronic contact. In particular, the contact between the connection contact and the electronic contact is not designed as a point contact. Due to the increased contact engagement length, the current capacity of the resulting electrical contact is increased, which subsequently ensures better signal quality of the transmitted (low-voltage) signals.

In a suitable embodiment, the plug-in side of the connection contact is designed as a pin contact. A pin contact is here understood to mean, in particular, a pin contact, a knife contact or a flat contact, i.e. a single-wire plug connection, which is connected or can be connected on the free end to a socket of the connection plug. The connection contact is therefore designed in particular as a combined pin socket connector.

The contact system according to the invention is intended for an auxiliary unit of a motor vehicle described above and is suitable and set up for it. The contact system has a contact element and an electrical interface.

The contact element here has at least one electronic contact designed as a stamped part, which is accommodated in a contact carrier designed as an overmolding. The contact carrier is intended and set up to be plug-mounted vertically with a circuit board of the auxiliary unit.

The interface here has at least one connecting contact designed as a stamped part, which is accommodated in a contact holder designed as an overmolding. The connection contact protrudes from the contact holder on both sides with a plug-in side and a base side, the base side being directly plug-connectable to an electronics contact of an electronics of the auxiliary unit.

A contact tab of the electronic contact protrudes from the contact carrier in such a way that it can be plugged into the connection contact of the interface along a plug-in direction oriented parallel to the circuit board. This creates a particularly suitable contact system for contacting the electronics of an auxiliary unit.

• 1 in perspektivischer Darstellung ausschnittsweise ein Nebenaggregat eines Kraftfahrzeugs mit einer Elektronik und mit einer elektronischen Schnittstelle sowie mit einem Kontaktelement,
• 2 in perspektivischer Darstellung das Kontaktelement,
• 3 in Draufsicht das Kontaktelement,
• 4 in perspektivischer Darstellung ausschnittsweise das Nebenaggregat mit einem Kontaktelement in einer zweiten Ausführung,
• 5 in perspektivischer Schnittansicht die Schnittstelle mit dem Kontaktelement gemäß der zweiten Ausführung,
• 6 in perspektivischer Darstellung das Kontaktelement gemäß der zweiten Ausführung,
• 7 in Frontansicht das das Kontaktelement gemäß der zweiten Ausführung, und
• 8 in Draufsicht ausschnittsweise eine Sockelseite eines Verbindungskontakts.

An exemplary embodiment of the invention is explained in more detail below with reference to a drawing. Show in it:

• 1 a perspective view of a detail of an auxiliary unit of a motor vehicle with electronics and with an electronic interface as well as with a contact element,
• 2 in perspective view the contact element,
• 3 in plan view the contact element,
• 4 a perspective view of a detail of the auxiliary unit with a contact element in a second version,
• 5 in a perspective sectional view the interface with the contact element according to the second embodiment,
• 6 a perspective view of the contact element according to the second embodiment,
• 7 in front view the contact element according to the second embodiment, and
• 8th a top view of a detail of a base side of a connection contact.

Corresponding parts and sizes are always provided with the same reference numbers in all figures.

The 1 shows a section of an electronics compartment 2 of an unspecified (motor vehicle) auxiliary unit. The auxiliary unit here is, for example, an electric refrigerant drive, with the electronics compartment 2 being shown without an electronics cover, so that a section of a circuit board 4 of an electronics unit 6 can be seen.

The electronics compartment 2 has a circumferential feed-through opening 8. In the area of the feedthrough opening 8, an electrical interface 10 is mounted on the outside, which closes or covers the feedthrough opening 8. The interface 10 is designed in particular as a connection or contact area for connecting a connection plug.

The interface 10 has a contact carrier 12 and three connection contacts 14 embedded therein. The connection contacts 14 are arranged parallel to one another in a common plane. The interface 10 is designed, for example, as a low-voltage interface, with two of the connection contacts 14 being connectable to a vehicle battery (KL30, KL31) and one of the connection contacts 14 being connectable to a bus line (COM).

The connecting contacts 14, designed as identical parts, are designed as stamped parts or stamped grids, which are received by the contact holder 12, which is designed as an overmolding. The connection contacts 14 are provided with reference numbers in the figures merely as examples.

The connecting contacts 14, which are designed as identical parts, each protrude from one of the connecting plugs or the outside of the electronics compartment facing plug-in side (connection side) 15 ( 5 ) and out of the contact holder 12 with a base side 16 facing the inside of the electronics compartment.

The interface 10 is arranged on a connection area 17 of the electronics compartment.

The plug-in side 15 is surrounded by a molded socket 18 of the contact holder 12, so that a plug-in socket is formed for plug-in connection with the connection plug. The base side 16 is also enclosed in a molded socket 19 of the contact holder 12, the socket 19 being seated in a form-fitting manner in the feed-through opening 8.

The contact holder 12 has a circumferentially widened (flange) collar 20 between the sockets 18, 19. The collar 20 has a screw eyelet 22, with the interface 10 being joined to the electronics compartment 2 with a fastening screw 24 in the assembled state. A secure attachment of the interface 10 to the electronics compartment 2 is achieved by means of the screw fastening and the bushing 18 which is seated in a form-fitting manner in the feed-through opening 10.

A contact element 26 is arranged on the circuit board 4. That in the 2 and in the 3 In this embodiment, the contact element 26 shown in more detail has three electronic contacts 28, which are accommodated in a contact carrier 30 designed as an overmolding.

The electronic contacts 28, which are designed as identical parts, protrude from the contact carrier 30 on both sides in the direction of the circuit board and in the direction of the interface, the interface-side parts of the electronic contacts 28 each being designed as a contact tab 32 and the circuit board-side parts of the electronic contacts 28 each being designed as a press-fit contact 34 .

The contact tabs 32 are designed in particular in the manner of a pin contact (knife contact, flat contact). The contact lugs 32 are oriented essentially vertically in this embodiment, this means that the contact lugs 32 protrude from the contact carrier 30 in such a way that their longitudinal direction is oriented essentially perpendicular to the circuit board 4.

The contact element 26 is fastened vertically to the circuit board 4 by means of the contact carrier 30, for example plug-connected or locked. For this purpose, four joining pins 36 are arranged on the contact carrier 30. The joining pins 36 are arranged in pairs on the short sides of the approximately cuboid contact carrier 30. For example, in the corner regions of the contact carrier 30 extensions 38 are formed, which carry the joining pins 36. The circuit board 4 has openings or receptacles (not shown) into which the joining pins 36 are inserted. For this purpose, the contact element 26 is pressed vertically onto the circuit board 4, so that the joining pins 36 are inserted or pressed into the openings or receptacles, and thus fix the contact element 26, for example, in a positive and/or non-positive manner on the circuit board 4.

In an embodiment not shown, the joining pins 36 are designed, for example, as locking hooks for latching or clipping to the circuit board 4, which are preferably integrally formed on the contact carrier 30. The locking hooks are each provided with an outward-facing locking lug on the free end.

The contact element 26 has a uniform pitch, i.e. a uniform distance (pitch) between the contact tabs 32 or electronic contacts 28. In particular, a distance 40 between two adjacent electronic contacts 28 is dimensioned to be the same size. The distance 40 is preferably dimensioned to be 4 mm. The contact element 26 is therefore designed as a 4 mm pitch connector.

The contact carrier 30 has two partition walls 42 which rise up along the longitudinal direction of the contact lugs 32 and which are each arranged centrally between two electronic contacts 28 arranged adjacently. The partitions 42 are integrally formed, i.e. in one piece or monolithic, onto the contact carrier 30. The partition walls 42, for example, have a height along the longitudinal direction which is larger than that of the contact tabs 32. In other words, the partitions 42 can survive the contact tabs 32.

In the 1 Visible base side 16 of the connection contacts 14 is designed, for example, as a contact fork with two contact prongs, between which one of the electronic contacts 28 is contacted in a positive and/or non-positive manner. The connecting contacts 14 are separated in the transverse direction by the partitions 42.

In the course of assembly and contacting, the contact element 26 is first locked vertically along a vertical direction with the circuit board 4, and in the process the press-fit contacts 34 are contacted with the circuit board 4. The interface 10 is then attached to the electronics compartment 2 from a horizontal direction oriented perpendicular to the vertical direction. Here, the socket 18 is inserted horizontally through the feed-through opening 8, with the base side 16 of the connection contacts 14 is plugged onto the contact lugs 32. This enables simple and automatable assembly as well as contacting and interconnection between the interface 10 and the circuit board 4.

Below is a second exemplary embodiment of the contact element 26 'based on 4 until 7 explained in more detail.

In this embodiment, the contact element 26' has three approximately L-shaped electronic contacts 28', the contact lugs 32 of which protrude from the contact carrier 30' horizontally, i.e. parallel to the circuit board 4 or coaxially to the insertion direction of the base sides 16. The distance between the contact lugs 32 is each dimensioned to 4 mm, with a horizontally oriented partition 42 being arranged between two adjacent contact lugs 32.

The contact carrier 30 'in this case has a horizontally oriented socket 44, in which the contact lugs 32 and the partitions 42 are arranged. Like especially in the 4 and 5 As can be seen, the socket 18 is positively inserted into the socket 44 when plugged in. In other words, the socket 18 of the interface 10 engages the socket 44 in a form-fitting manner at least in sections.

Two raised holding shoulders 46 are formed laterally on the contact carrier 30 ', onto each of which an approximately U- or V-shaped locking element 48 is attached. The locking elements 48 each have two locking hooks 48a with molded locking lugs 48b.

In the course of assembly and contacting, the contact element 26 is first locked vertically along the vertical direction with the circuit board 4, and in the process the press-fit contacts 34 are contacted with the circuit board 4. For this purpose, for example, the locking elements 48 are first joined to the holding shoulders 46 of the contact carrier 30 'and then the contact element 26' is placed on the circuit board 4. The interface is then attached to the electronics compartment 2 from the horizontal direction. Here, the socket 18 is guided horizontally through the feed-through opening 8 and inserted into the socket 44, with the base side 16 of the connection contacts 14 being plugged onto the contact lugs 32 '. This enables simple and automatable assembly as well as contacting and interconnection between the interface 10 and the circuit board 4.

Like in the 5 As can be seen, the collar 20 has a circumferential groove 50 on the end face facing the electronics compartment 2, which surrounds the socket 19. A sealing element 52 is inserted into the groove 50, which seals the feed-through opening 8 - and thus the electronics compartment 2 - as fluid-tight as possible.

The structure of a connection contact 14 is shown below based on 5 and 8th explained in more detail. The plug-in side 15 of the connection contact 14 is designed as a pin contact, in particular as a pin or flat contact.

In the 8th Individually shown base side 16 of the connection contact 14 is designed as a contact fork with two contact prongs 54, between which the electronic contact 28, 28 'is contacted in a positive and / or non-positive manner. An approximately U-shaped recess is made between the contact prongs 54, which serves as a receptacle for the electronic contact 28, 28 '. Preferably, the contact tines 54 each have a nose-like extension 56 on the free end. The extensions 56 are oriented facing each other. In other words, the extensions 56 protrude into the recess and thus reduce its clear width in sections. In the contact state, the electronic contact 28, 28 'is held clamped between the extensions 56.

The extensions 56 lie along the longitudinal direction of the tines with a contact length 58 on the opposite flat sides of the electronic contact 28, 28 '. The contact length 58 is dimensioned between 1 mm and 2 mm, in particular between 1.5 mm and 1.9 mm. The contact length 58 is preferably at least 1.7 mm, for example 1.77 mm.

The claimed invention is not limited to the exemplary embodiments described above. Rather, other variants of the invention can also be derived by the person skilled in the art within the scope of the disclosed claims without departing from the subject matter of the claimed invention. In particular, all of the individual features described in connection with the various exemplary embodiments can also be combined in other ways within the scope of the disclosed claims without departing from the subject matter of the claimed invention.

The design of the contact element 26, 26 'is inventive in itself and therefore represents its own invention. The interface 10 also represents an independent invention.

Reference symbol list

2

Electronics compartment

4

Circuit board

6

electronics

8th

Through opening

10

interface

12

Contact carrier

14

Connection contact

15

plug-in side

16

Base side

17

Connection area

18

Rifle

19

Rifle

20

collar

22

screw eye

24

Fastening screw

26, 26'

Contact element

28, 28'

Electronic contact

30, 30'

Contact carrier

32

Contact flag

34

Pressfit contact

36

joining pin

38

boom

40

Distance

42

partition wall

44

Rifle

46

holding shoulder

48

Locking element

48a

Latching hook

48b

detent nose

50

Nut

52

Sealing element

54

contact tines

56

appendage

58

Contact sounds

Claims (11)

Ancillary unit for a motor vehicle, in particular an electric refrigerant compressor, having an electronics compartment (2) with electronics (6) accommodated therein, and an electrical interface (10) attached to the electronics compartment (2) for electrically contacting a connection plug with the electronics (6), - wherein the electronics (6) has a circuit board (4) and a contact element (26, 26 '), - wherein the contact element (26, 26') has an electronic contact (28, 28') designed as a stamped part, which is accommodated in a contact carrier (30, 30') designed as an overmolding, - the contact carrier (30, 30') being plug-mounted vertically with the circuit board (4), - wherein a contact tab (32) of the electronic contact (28, 28') protrudes from the contact carrier (30, 30'), - wherein the interface (10) has at least one connecting contact (14) designed as a stamped part, which is accommodated in a contact carrier (12) designed as an overmolding, - wherein the connection contact (14) protrudes from the contact holder (12) on both sides with a plug-in side (15) facing the connection plug and with a base side (16) facing the electronics contact (28, 28'), and - The base side (16) is directly plug-connected to the contact lug (32) along a plug-in direction oriented parallel to the circuit board (4). auxiliary unit Claim 1 , characterized in that the interface (10) has a number of connection contacts (14), and that the contact element (26, 26 ') has a corresponding number of electronic contacts (28, 28'). auxiliary unit Claim 2 , characterized in that the interface (10) has exactly three connection contacts (14), and the contact element (26, 26 ') has exactly three electronic contacts (28, 28'). auxiliary unit Claim 2 or 3 , characterized in that a distance (40) between adjacent electronic contacts (28, 28 ') is the same size. Ancillary unit according to one of the Claims 2 until 4 , characterized in that a partition (42) is formed on the contact carrier (30, 30') between two adjacent electronic contacts (28, 28'). Ancillary unit according to one of the Claims 1 until 5 , characterized in that a longitudinal direction of the contact lug (32) is oriented parallel to the circuit board (4). Ancillary unit according to one of the Claims 1 until 6 , characterized in that at least two resilient locking hooks (48a) are arranged on the contact carrier (30 '), by means of which the contact carrier (30') is locked in locking openings in the circuit board (4). Auxiliary unit according to 7, characterized in that the locking hooks are integrally formed on the contact carrier. Ancillary unit according to one of the Claims 1 until 8th , characterized in that the base side (16) is designed as a contact fork with two contact prongs (54), between which the electronic contact (28, 28 ') is enclosed in a positive and/or non-positive manner. Ancillary unit according to one of the Claims 1 until 9 , characterized in that the plug-in side (15) is designed as a pin contact. Contact system for an auxiliary unit of a motor vehicle according to one of Claims 1 until 10 , comprising - a contact element (26, 26 ') with an electronic contact (28, 28') designed as a stamped part, which is received in a contact carrier (30, 30') designed as an overmolding, the contact carrier (30, 30') being vertical can be plugged into a circuit board (4) of the auxiliary unit, with a contact tab (32) of the electronic contact (28, 28') protruding from the contact carrier (30, 30'), and - an electrical interface (10) with at least one designed as a stamped part Connection contact (14), which is accommodated in a contact holder (12) designed as an overmolding, the connection contact (14) protruding from the contact holder (12) on both sides with a plug-in side (15) and with a base side (16), - the base side (16) can be directly connected to the contact lug (32) along a plug-in direction oriented parallel to the circuit board (4).

Images