EP2347475B1 - Hf plug connector - Google Patents

Description

The present invention relates to an RF connector having an outer conductor part, an inner conductor part arranged inside the outer conductor part and a plug-side end which is designed for plug-in connection to a complementary RF plug connector, wherein at the plug-side end of the HF plug connector an outer conductor part at least partially surrounding Housing of an electrically insulating material, in particular a plastic housing, is arranged, wherein the housing has a through hole into which the outer conductor part engages, according to the preamble of claim 1.

From the US 2003/0176104 A1 is a known coaxial connector with a plastic housing, which is called the. FAKRA standardization scheme (FAKRA = Fa ch k rice utomobiltechnik) for SMB connections corresponds. Here, a plastic housing is provided which holds the connector, protects and pre-positioned for the mating process with another connector with plastic housing. The housing additionally has mechanical codings, so that only matching housings can be inserted into each other.

Such plastic housing for coaxial connectors, which are also called FAKRA housing found in automotive engineering for data transmission cable. These data transmission cables are common Coaxial cable or similar cable based on an electrical conductor. The mechanical dimensions of such FAKRA housings in the interface area, ie in an axial portion of the housing which cooperates with a complementary plug to provide a mechanical connection between both plastic housings, are in the DIN standard 72594-1 in the October version 2004 set. The part entitled "Road Vehicles - 50 Ohm High Frequency Interface (50 Ω HFSSt) - Part 1: Dimensions and Electrical Requirements" of the above-mentioned DIN standard 72594-1 specifies connectors and couplers of an interface with an impedance of 50 ohms for high frequency Applications (50 Ω HFSSt) in road vehicles, thus ensuring communication to and from the vehicle. It specifies dimensional and electrical requirements and properties and ensures their interchangeability. All well-known automakers manufacture according to this standard. The content of this standard is determined by the Automotive Standards Committee (FAKRA).

The Automotive Standards Committee (FAKRA) at DIN represents the regional, national and international standardization interests in the field of automotive engineering. The area of responsibility of FAKRA includes the compilation of all standards regarding compatibility, interchangeability and safety for road vehicles according to DIN 70010 (except tractors), regardless of whether these road vehicles are equipped with internal combustion engines, electric motors or hybrid drives. The FAKRA also produces standards for the bodies of these road vehicles (with the exception of municipal vehicles, fire engines and ambulances). He is also responsible for the standardization of the entire equipment of the above-mentioned vehicles and superstructures, as well as standardization of freight containers (ISO containers). Standardization promotes rationalization and quality assurance in motor vehicle construction as well as the environmental compatibility of the motor vehicle. In addition, it contributes to the current state of technology and science to increase vehicle and road safety, for the benefit of manufacturers and consumers.

It will be on the EP 1 154 522 A2 which discloses the features of the preamble of claim 1.

The invention is based on the object, an RF connector of o.g. Type with regard to assembly and functional safety to improve.

This object is achieved by an RF connector of the above. Art solved with the features characterized in claim 1. Advantageous embodiments of the invention are described in the further claims.

For an RF connector of the above-mentioned. It is inventively provided that the outer conductor part has a first axial securing of the housing, which is designed such that this first axial fuse stretches a first predetermined portion of the housing when mounted on the outer conductor part, and that the outer conductor part has a second axial securing of the housing , which is formed such that this second axial fuse compresses a second predetermined portion of the housing when mounted on the outer conductor part.

This has the advantage that the axial securing of the housing on the outer conductor part effectively prevents axial removal of the housing from the outer conductor part independently of an ambient temperature and thus independently of a temperature-related change in the dimensions of the housing.

Expediently, the first axial securing means and / or the second axial securing means are / is formed in a region of the outer conductor part which engages in the passage bore of the housing.

In a preferred embodiment, the first axial securing at least one in the region of the outer conductor part, which engages in the through hole of the housing, formed, in the circumferential direction at least partially encircling survey, wherein an outer diameter of the outer conductor part in the region of this survey is greater than an inner diameter of the through hole of the housing in the region of the first predetermined portion.

In a preferred embodiment, the second axial securing in the region of the outer conductor part, which engages in the through hole of the housing, formed and has at least a pair of claw-shaped elevations, which rises in the radial direction from the periphery of the outer conductor part, wherein the claw-shaped elevations of a pair are facing each other in the circumferential direction.

For interacting with the pairs of claw-shaped elevations, the second predetermined section has at least one web extending radially inwardly on the inside of the housing and extending in the axial direction, wherein a width of the web in the direction perpendicular to the axial direction is greater than a distance of the web claw-shaped elevations of a couple.

Characterized in that two, three, four or more webs are formed and spaced from each other in the circumferential direction, the housing can be mounted with different angular positions relative to the outer conductor part of this. Here, the webs are preferably evenly spaced in the circumferential direction.

Conveniently, two or more pairs of claw-shaped elevations are formed and in the circumferential direction of each other in particular uniformly spaced.

In a preferred embodiment, the RF connector is designed as a RF coaxial connector, wherein the outer conductor part and the inner conductor part are arranged coaxially with each other.

Conveniently, the housing is formed to have mechanical dimensions in its interface area that conform to the FAKRA standardization scheme for 50 Ω HFSSt.

In a preferred embodiment, the first axial securing device and / or the second axial securing device are / is integrally formed with the outer conductor part.

The outer conductor part is formed for example as a zinc die-cast part.

Fig. 1

eine bevorzugte Ausführungsform eines erfindungsgemäßen HF-Steckverbinders ohne Gehäuse in perspektivischer Ansicht,

Fig. 2

den HF-Steckverbinder gemäß Fig. 1 mit montiertem Gehäuse in einer weiteren perspektivischen Ansicht,

Fig. 3

den HF-Steckverbinder gemäß Fig. 1 mit montiertem Gehäuse in Schnittansicht,

Fig. 4

den HF-Steckverbinder gemäß Fig. 1 ohne Gehäuse in einer Ansicht von oben,

Fig. 5

den HF-Steckverbinder gemäß Fig. 1 ohne Gehäuse in einer Seitenansicht und

Fig. 6

den HF-Steckverbinder gemäß Fig. 1 mit montiertem Gehäuse in einer weiteren Schnittansicht.

The invention will be explained in more detail below with reference to the drawing. This shows in:

Fig. 1

A preferred embodiment of an RF connector according to the invention without housing in a perspective view,

Fig. 2

the RF connector according to Fig. 1 with mounted housing in a further perspective view,

Fig. 3

the RF connector according to Fig. 1 with assembled housing in sectional view,

Fig. 4

the RF connector according to Fig. 1 without housing in a view from above,

Fig. 5

the RF connector according to Fig. 1 without housing in a side view and

Fig. 6

the RF connector according to Fig. 1 with mounted housing in a further sectional view.

The in the Fig. 1 to 6 shown, preferred embodiment of an RF connector according to the invention is designed as an RF coaxial connector and comprises an outer conductor part 10, disposed within the outer conductor part 10 inner conductor part 12 and a plug-side end 14, which for plug-in connection with a complementary RF connector (not shown) is. At the plug-in end 14 of the RF connector, a housing 16 at least partially surrounding the outer conductor part 10 made of an electrically insulating material, such as a plastic housing, arranged. This housing 16 has a through hole 18 into which the outer conductor part 10 engages.

The housing 16 is secured in the axial direction against removal of the outer conductor part 10 or a region 36 of the outer conductor part 10, which engages in the housing 16. For this purpose, two mutually independent, axial fuses are provided according to the invention. Both axial fuses are formed in the illustrated embodiment on the outer circumference of the outer conductor part 10 in that region 36 which engages in the through hole 18 of the housing 16. A first axial securing of the housing 16 is formed such that it expands a first predetermined portion 22 of the housing 16 when mounted on the outer conductor part 10. A second axial securing of the housing 16 is designed such that it compresses a second predetermined portion 24 of the housing 16 when mounted on the outer conductor part 10.

As in particular from Fig. 1 . 3 . 4 and 5 for the exemplified, preferred embodiment of the RF connector according to the invention, the first axial securing two circumferentially on opposite sides each partially encircling elevations 20 in the region 36 of the outer conductor part 10, which engages in the through hole 18 of the housing 16. These elevations 20 are formed such that an outer diameter of the outer conductor part 10 in the region of the elevations 20 is greater than an inner diameter of the through hole 18 of the housing 16 in the region of the first predetermined portion 22. In this way, the housing 16 during the axial sliding of the housing 16th to the outer conductor part 10 to the desired position in the region of the first predetermined portion 22 radially outwardly stretched. The resulting radially inwardly directed force due to the radial elastic stretching of the housing 16 holds the housing 16 firmly on the outer conductor part 10 and secures the housing 16 against axial withdrawal from the outer conductor part 10.

As in particular from Fig. 1 . 4 and 6 for the exemplified, preferred embodiment of the RF connector according to the invention, the second axial securing comprises two pairs of claw-shaped elevations 26, which rise in the radial direction from the circumference of the outer conductor part. The two pairs of claw-shaped elevations 26 are arranged on opposite sides of the outer conductor part 10 in the region 36 of the outer conductor part 10, which engages in the through-bore 18 of the housing 16. The claw-shaped elevations 26 of a pair are facing each other in the circumferential direction and define therebetween a distance 28 in the circumferential direction. Each claw-shaped elevation 26 has a hook-shaped portion which is aligned away from the plug-side end 14. The second predetermined region 24 of the housing 16 comprises four webs 30 which rise radially inwardly on the inside of the housing 16 and extend in each case in the axial direction. The webs 30 are uniformly spaced apart in the circumferential direction, so that when the housing 16 is pushed axially onto the outer conductor part 10, two webs 30 always engage between two claw-shaped elevations 26 so that the respective pair of claw-shaped elevations 26 cooperate with one of the webs 30. Here, a width of the webs 30 in the direction perpendicular to the axial direction is greater than the distance 28 of the claw-shaped elevations 26 of a pair. In this way, the claw-shaped elevations 26 press the webs 30 together. The resulting force between the claw-shaped elevations 26 and the respective web 30 secures the housing 16 against being pulled off the outer conductor part 10 in the axial direction, since the hooks of the claw-shaped elevations 26 are directed away from the plug-side end 14 in the axial direction. The arrangement of pairs of claw-shaped elevations 26 and the webs 30, the housing 16 can be pushed with different angular positions relative to the outer conductor part 10 on this axially. At the same time the housing 16 is secured against rotation in the circumferential direction relative to the outer conductor part 10.

At a temperature-induced widening of the dimensions of the housing 16 at higher temperatures, the holding force between the first predetermined Section 22 of the housing 16 and the projections 20, since the inner diameter of the housing 16 in the first predetermined section 22 increases. However, at the same time the holding force between the claw-shaped elevations 26 and the webs 30 increases, since the width of the webs 30 increases due to the temperature-induced widening of the dimensions of the housing 16. Thus, even at high temperatures sufficient axial securing of the housing 16 against axial withdrawal from the outer conductor part 10 by the second axial securing 26 in cooperation with the webs 30 is ensured.

At a temperature-induced shrinkage of the dimensions of the housing 16 at low temperatures, the holding force between the claw-shaped elevations 26 and the webs 30 decreases, as well as the width of the webs 30 shrinks. However, at the same time, the holding force between the first predetermined portion 22 of the housing 16 and the elevations 20 increases because the temperature-related shrinkage of the dimensions of the housing 16 also reduces the inner diameter of the housing 16 in the first predetermined section 22. Thus, even at low temperatures sufficient axial securing of the housing 16 against axial withdrawal from the outer conductor part 10 by the first axial securing 20 is ensured.

Overall, results from the temperature-related change in the dimensions of the housing 16 counteracting axial fuses 20, 22 on the one hand (elongation) and 26, 30 on the other hand (compression) a wide temperature range in which the mechanical reliability of the RF connector according to the invention with respect to the axial support of the housing 16 on the outer conductor part 10 or the region 36 is ensured.

The housing 16 is formed as a FAKRA housing and has on its outer periphery elevations, which serve a mechanical coding 32 for mating with other housings 16 and as a latching mechanism 34 for mechanically connecting two mated housings 16.

Claims (13)

1. HF plug connector having an outer conductor part (10), an inner conductor part (12) arranged within the outer conductor part (10) and a mating-side end (14) which is configured for plug-in connection to a complementary HF plug connector, wherein a housing (16) made from an electrically insulating material, particularly a plastics housing, is arranged at the mating-side end (14) of the HF plug connector, at least partially surrounding the outer conductor part (10), wherein the housing (16) has a through bore (18) in which the outer conductor part (10) engages, characterised in that the outer conductor part (10) comprises a first axial retaining element (20) of the housing (16), configured such that said first axial retaining element (20) expands a first pre-determined section (22) of the housing (16) on assembly thereof on the outer conductor part (10), and that the outer conductor part (10) has a second axial retaining element (26) of the housing (16), configured such that said second axial retaining element (26) compresses a second pre-determined section (24, 30) of the housing (16) on assembly thereof on the outer conductor part (10).
2. HF plug connector according to claim 1, characterised in that the first axial retaining element (20) and/or the second axial retaining element (24, 30) is/are provided in a region (36) of the outer conductor part (10) which engages in the through bore (18) of the housing (16).
3. HF plug connector according to at least one of the preceding claims, characterised in that the first axial retaining element has at least one projection (20) which is provided in the region (36) of the outer conductor part (10) which engages in the through bore (18) of the housing (16), said projection being at least partially encompassing in the peripheral direction, wherein an outer diameter of the outer conductor part (10) is larger in the region of said projection (20) than an inner diameter of the through bore (18) of the housing (16) in the region of the first pre-determined section (22).
4. HF plug connector according to at least one of the preceding claims, characterised in that the second axial retaining element is provided in the region (36) of the outer conductor part (20) which engages in the through bore (18) of the housing (16) and has at least one pair of claw-like projections (26) which extend in the radial direction from the periphery of the outer conductor part (10), wherein the claw-like projections (26) of one pair face one another in the peripheral direction.
5. HF plug connector according to claim 4, characterised in that the second pre-determined section (24) has at least one web (30) projecting radially inwardly from the inside of the housing (16) and extending in the axial direction, wherein a width of the web (30) in the direction perpendicular to the axial direction is greater than a separation (28) of the claw-like projections (26) of one pair.
6. HF plug connector according to claim 5, characterised in that two, three, four or more webs (30) are provided and are spaced apart from one another in the peripheral direction.
7. HF plug connector according to claim 6, characterised in that the webs (30) are equally spaced apart from one another in the peripheral direction.
8. HF plug connector according to at least one of the claims 4 to 7, characterised in that two or more pairs of claw-like projections (26) are provided and are spaced apart from one another in the peripheral direction.
9. HF plug connector according to claim 8, characterised in that the pairs of claw-like projections (26) are equally spaced apart from one another in the peripheral direction.
10. HF plug connector according to at least one of the preceding claims, characterised in that the HF plug connector is configured as an HF coaxial plug connector, wherein the outer conductor part (10) and the inner conductor part (12) are arranged coaxially with one another.
11. HF plug connector according to at least one of the preceding claims, characterised in that the housing (16) is configured so as to have mechanical dimensions in the interface region thereof which comply with the FAKRA standardisation scheme for 50-Ω-HFSSt.
12. HF plug connector according to at least one of the preceding claims, characterised in that the first axial retaining element (20) and/or the second axial retaining element (26) is/are configured integrally with the outer conductor part (10).
13. HF plug connector according to at least one of the preceding claims, characterised in that the outer conductor part (10) is configured as a zinc diecast component.

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