DE102017117005A1 - Coaxial connector - Google Patents

Abstract

A coaxial connector (1) is provided with a central inner conductor (2) and an outer conductor (4) coaxial with the central inner conductor (2), between the central inner conductor (2) and the outer conductor (4) coaxial with the central inner conductor (2). a dielectric (3,103) is arranged, wherein the dielectric (3,103) has slots (31,32,33,34,131, 132,133,134,141,142).

Description

The invention relates to a coaxial connector having the features of the preamble of claim 1.

Such coaxial connectors, which include, for example, the widely used BNC connectors, are well known. They regularly have a central inner conductor and a coaxial to the central inner conductor outer conductor. Between the central inner conductor and the outer conductor coaxial with the central inner conductor, a dielectric is arranged as insulator.

In practice, it has been found that such connectors can often result in considerable manufacturing tolerances, in particular with regard to the positioning of the dielectric relative to the inner conductor and the outer conductor. This is problematic because it can affect the quality of the connector, in particular if the dielectric has been positioned so that it over the mating surface, so the intended contact surface between the plug and socket (in particular not necessarily be flat and the concrete design of Plug and socket depends) protrudes, but also because unwanted air gaps can occur in the mating area, which can reduce the quality of the signals transmitted via the inner conductor and disturb them in particular with RF connectors.

The object of the invention is therefore to provide a coaxial connector with which such manufacturing tolerances can be compensated. This object is achieved by a coaxial connector having the features of claim 1. Advantageous developments of the invention are the subject of the dependent claims.

A coaxial plug connector according to the invention has a central inner conductor and an outer conductor coaxial with the central inner conductor, a dielectric being arranged between the central inner conductor and the outer conductor coaxial with the central inner conductor. It is essential to the invention that the dielectric has slots.

Due to the slits in the dielectric, this becomes more flexible, in particular easier to compress and bend. Accordingly, then, when plugging the coaxial connector any protruding beyond the mating portions of the dielectric, which have been negatively impacted on the quality of the connector, are simply brought by pressing into their desired position.

It is particularly preferred that the dielectric extends beyond the insertion plane in the non-inserted state of the coaxial connector and is in the inserted state of the coaxial connector in the insertion plane. This ensures that in any case a certain degree of compression of the dielectric takes place, which reliably avoids the occurrence of air gaps in the plug-in area in any case.

If the dielectric has a recess for receiving the central inner conductor and that the slots run parallel to the direction of the recess, an impedance matching can alternatively or additionally also be achieved.

Alternatively, it is provided in another embodiment that the dielectric has a recess for receiving the central inner conductor and that the slots are perpendicular to the direction of the recess. This embodiment is very easy to manufacture in terms of manufacturing technology.

If, in this case, the slots penetrate the dielectric in the radial direction as far as the recess, this leads to a good bendability of the dielectric in this region in the direction perpendicular to the slot. In order to improve the bendability in other directions, it is advantageous if adjacent slots in the axial direction of the recess cover the dielectric in the radial direction different polar angle ranges. In particular, it is preferable if adjacent slots extend in the axial direction of the recess perpendicular to one another.

When the slots are arranged to form pairs, with one slot of such a pair being mirror-symmetrical to the other slot of that pair with respect to the recess, a particularly simple compressibility and a high flexibility can be achieved.

The invention will be explained in more detail with reference to figures showing exemplary embodiments.

• 1a: Einen als Stecker ausgestalteten koaxialen Steckverbinder mit Buchse,
• 1b: den koaxialen Steckverbinder aus 1a im in die Buchse eingesteckten Zustand,
• 2a: das Dielektrikum des koaxialen Steckverbinders aus 1a,
• 2b: einen Längsschnitt durch das Dielektrikum aus der 2a,
• 2c: einen ersten Querschnitt durch das Dielektrikum aus 2a, geschnitten entlang der Schnittachse A-A aus 2b,
• 2d: einen zweiten Querschnitt durch das Dielektrikum aus 2a, geschnitten entlang der Schnittachse B-B aus 2b, und
• 3: eine alternative Ausführungsform eines Dielektrikums für den koaxialen Steckverbinder aus 1a.

Show it:

• 1a : A male connector designed as a coaxial connector,
• 1b : the coaxial connector off 1a in the inserted state in the socket,
• 2a : the dielectric of the coaxial connector 1a .
• 2 B a longitudinal section through the dielectric from the 2a .
• 2c : a first cross section through the dielectric 2a , cut along the cutting axis AA 2 B .
• 2d : a second cross-section through the dielectric 2a , cut along the cutting axis BB 2 B , and
• 3 FIG. 3: an alternative embodiment of a dielectric for the coaxial connector 1a ,

In 1a and 1b is a coaxial connector 1 each together with a corresponding socket 5 shown in cross section, wherein in 1a the coaxial connector 1 in from the socket 5 separate state and in 1b the coaxial connector 1 im with the socket 5 Connected state is shown.

The coaxial connector 1 has a central inner conductor 2 , and one to the central inner conductor 2 coaxial outer conductor 4 on. Between the central inner conductor 2 and to the central inner conductor 2 coaxial outer conductor 4 is a dielectric 3 arranged, which is a recess 35 in which the central inner conductor 2 sitting.

In the dielectric 3 is a repeating sequence of slots 31 . 32 . 33 . 34 introduced, for example by incisions from the outside of the dielectric 3 ago. Slits that differ only in their axial position are identified by the same reference numeral. Because of the location of the cut in which the 1a and 1b are shown is the section 34 can not be seen in these figures and the exact course of the slots 31 . 32 and 33 . 34 not easy to recognize; but he will be using the below described 2a to 2d clear.

As with a comparison of 1a and 1b clearly recognizes each other, the dielectric protrudes 3 when not plugged in via the plug-in level 6 In addition, which would affect the quality of the connector in a conventional connector according to the prior art or the creation of the connector would at worst completely frustrate. In the illustrated connector 1 this is not the case because of the slots 31 . 32 . 33 . 34 in the dielectric 3 when connecting to the jack 5 the slots 31 . 32 . 33 . 34 squeezed until the dielectric 3 with its the socket 5 facing end face again in the mating plane 6 lies.

2a shows the dielectric 3 , the coaxial connector 1 in a separate presentation. The dielectric 3 has a cylindrical base body which has a coaxial bore to the cylinder axis as a recess 35 for receiving an inner conductor of the coaxial connector and the repeating sequence of slots 31 . 32 . 33 . 34 which is perpendicular to the predetermined by the cylinder axis direction of the recess 35 are executed and the dielectric 3 in the radial direction r each to the recess 35 push through. Again, slots that differ only in their axial position, again with the same reference numeral.

The slots 31 and 32 such as 33 and 34 together form a pair of slots 31 . 32 respectively. 33 . 34 , Here are the slots 31 . 33 each mirror-symmetrical to the other slot 32 . 34 the couple of slots 31 . 32 respectively. 33 . 34 with respect to the recess 31 arranged.

As in particular the longitudinal section of the 2 B and the cross-sectional views of 2c and 2d clarify, the dielectric is in the range of such a pair 31 . 32 , respectively. 33 . 34 only through narrow bars 36 . 37 respectively. 38 . 39 of the dielectric 3 held together, which causes the dielectric 3 is very flexible at these points and in particular can be slightly compressed or compressed and bent. There are bends around an axis, which are parallel to the webs 36 . 37 respectively. 38 . 39 runs particularly easily possible while bends around an axis perpendicular to the webs 36 . 37 respectively. 38 . 39 because of the higher bending moments to be applied, they are much more difficult.

Nevertheless, a good flexibility of the dielectric 3 to ensure in all directions, cover in the axial direction predetermined by the cylinder axis a adjacent slots 31 . 33 respectively. 32 . 34 each different areas of the polar angle φ , In the illustrated embodiment, they each extend perpendicular to each other.

3 shows an alternative embodiment of a dielectric 103 for the coaxial connector 1 out 1a with a cylindrical base body, the one to the cylinder axis a coaxial bore as a recess 135 for receiving an inner conductor of the coaxial connector 1 , The dielectric 103 has a first rigid section 103a , a second rigid section 103c and one between the first rigid section 103a and the second rigid section 103c arranged flexible and compressible section 103b ,

The flexible and compressible section 103b points as above for the dielectric 3 described a repeating sequence of slots 131 . 132 . 133 . 134 on which perpendicular to the through the cylinder axis a predetermined course direction of the recess 135 are executed and the dielectric 103 in the radial direction r each to the recess 135 enforce and between those narrow bridges 136 . 137 respectively. 138 . 139 run. Again, slots that differ only in their axial position, again with the same reference numeral. For more information on the structure and function of the slots 131 . 132 . 133 . 134 or webs 136 . 137 . 138 . 139 can on the description to the 2a to 2d to get expelled.

The main difference between the dielectric 103 and the dielectric 3 is that in the rigid sections 103a and 103c each slots 141 respectively. 142 are arranged, which are parallel to the direction of the recess 135 run. The slots 141 . 142 are designed so that at the transition between the flexible section 103b and the respective adjacent rigid section 103a respectively. 103c An impedance is avoided because the same effective permeability is set on both sides of the junction. Basically, the slots can 141 . 142 not only, as in 3 shown, from the outside but also starting from the recess 135 outward into the dielectric 103 be introduced.

By varying the depth, shape and number of slots 141 . 142 you can make the impedance adjustment targeted.

In particular, it is also possible slots 141 . 142 only in one of the rigid sections 103a . 103c of the dielectric 103 provided.

LIST OF REFERENCE NUMBERS

1

coaxial connector

2

inner conductor

3,103

dielectric

4

outer conductor

5

Rifle

6

plug level

31,32,33,34

slot

35

recess

36,37,38,39

web

103a, 103c

rigid section

103b

flexible section

131,132,133,134,141,142

slot

135

recess

136,137,138,139

web

a

axial direction

r

radial direction

φ

polar angle

A-A

intersection

B-B

intersection

Claims (8)

Coaxial connector (1) having a central inner conductor (2) and an outer conductor (4) coaxial with the central inner conductor (2), wherein a dielectric (between the central inner conductor (2) and the outer conductor (4) coaxial to the central inner conductor (2) 3,103), characterized in that the dielectric (3,103) has slots (31,32,33,34,131,132,133,134, 141,142). Coaxial connector (1) to Claim 1 , characterized in that the dielectric (3,103) in the non-inserted state of the coaxial connector (1) protrudes beyond its insertion plane (6) and in the inserted state of the coaxial connector (1) in the insertion plane (6). Coaxial connector (1) to Claim 1 or 2 , characterized in that the dielectric (103) has a recess (135) for receiving the central inner conductor (2) and that the slots (141,142) extend parallel to the direction of extension of the recess (135). Coaxial connector (1) to Claim 1 or 2 , characterized in that the dielectric (3,103) has a recess (35,135) for receiving the central inner conductor (2) and that the slots (31,32,33,34,131,132,133,134) perpendicular to the direction of the recess (35,135) extend. Coaxial connector (1) to Claim 4 , characterized in that the slots (31,32,33,34,131,132,133,134), the dielectric (3) in the radial direction (r) up to the recess (35, 135) pass through. Coaxial connector (1) to Claim 4 or 5 , characterized in that in the axial direction (a) of the recess (35,135) adjacent slots (31,32,33,34,131,132,133,134) the dielectric (3, 103) in the radial direction (r) cover different regions of a polar angle (φ). Coaxial connector (1) to Claim 6 , characterized in that in the axial direction (a) of the recess (35,135) adjacent slots (31,32,33,34,131,132,133,134) perpendicular to each other. Coaxial connector (1) according to one of Claims 4 to 7 , by characterized in that the slots (31, 32, 33, 34, 131, 132, 133, 134) are arranged to form pairs (31, 32; 33, 34; 131, 132; 133, 134), one slot (31, 33; 131, 133) of such a pair (31,32; 33,34; 131,132; 133,134) is mirror-symmetrical to the other slot (32,34; 132,134) of this pair (31,32; 33,34; 131,132; 133,134) with respect to the recess (35,135).

Images