DE20001782U1 - Cutting device for shield cables - Google Patents

Description

Cutting device for shield cables

The invention relates to a cutting connection device for shielded cables, preferably for shielded cables with at least one inner conductor, an inner insulation surrounding the conductors, a cable shield surrounding the conductors and the inner insulation and an outer insulation, which has a contact body which is partially U-shaped in cross-section for receiving the shielded cable, wherein cutting edges extend inwards from the U-shaped contact body for penetrating the outer insulation.

A cutting connection device of this type is known from DE 1 765 203. However, the connection device for coaxial cables shown in this document has the problem that there is a risk of the cable shielding braid being destroyed when the outer insulation is cut through. There is also a risk that the cable shielding will not be adequately contacted. The invention addresses these problems and aims to solve them.

LOESENBECK · STRACKE · SPECHT ■ DANTZ -

ATENT AND TRADEMARK ATTORNEYS Registration text dated 02.02.2000 Page 2

The invention solves this problem through the subject matter of claim 1. According to this, a contact area is directly connected to the cutting edges, at least in sections facing outwards from the cutting edges, which makes surface contact with the cable shield. Unlike the prior art, the functions of "cutting through the insulation" and "contacting the cable shield" are implemented by areas on the connection element that are integrally connected to one another but are nevertheless designed differently. Like the generic prior art, the invention also offers the advantage that in order to contact the cable shield, it is only necessary to press the shield cable into the contact body, whereby the outer insulation is cut through and the contact areas are then contacted. Unlike the prior art, however, this is done with a reduced risk of damage to the cable shield and with improved contact between the two elements, contact body and shield.

According to a preferred embodiment of the invention, at least one cutting and contacting device (in the manner of an IDC contact) is designed in the direction of the shield cable extension, offset longitudinally to the U-shaped contact body, for penetrating the inner insulation and for contacting the at least one inner conductor. This variant of the invention has the following advantage. To connect a shield cable, the outer insulation and the cable shield are first separated in one end area so that the inner conductors and their insulation protrude freely axially from the cable. The shield cable is then inserted into the contact body so that the cable shield is contacted.

The free conductor(s) is/are then placed in the cutting and contacting device(s) to penetrate the inner insulation and to contact at least one inner conductor. It is therefore possible to make contact with both the cable shield and the inner conductor(s) with a minimum of cutting processing and without any actual stripping measures.

LOESENBECK · STRACKE ■ SPECHT · DANTZ - PATEN™IW&!TE - EURQPßVi PATENT AND TRADEMARK ATTORNEYS

Registration text dated 02.02.2000 Page 3

Particularly preferably, the U-shaped contact body and/or the cutting and contacting device for penetrating the inner insulation and for contacting the at least one inner conductor are provided with mounting and/or soldering pins and arranged on a circuit board or a mounting plate, preferably in the manner of a pre-assembled assembly unit for a wide variety of applications. Soldering onto circuit boards results in a particularly uncomplicated, easily automated attachment of the shielding cables to a circuit board.

According to a further particularly preferred variant of the invention, the U-shaped contact body is designed as an element of a plug that is designed to be foldable in sections, such that the contact body for inserting the shielding cable is particularly easy and uncomplicated to access by folding open the plug.

Further advantageous embodiments of the invention can be found in the remaining subclaims.

In the following, embodiments of the invention are described in more detail with reference to the drawing. It shows:
20

Fig. 1 and 2 different views of a first embodiment of the invention designed as a contact body; and

Fig. 3 and 4 different views of a second embodiment of the invention designed as a contact body.

Fig. 1 to 4 each show a cutting connection device for shielded cables 2, which consists solely of a contact body 4 with a U-shaped cross-section in sections for receiving the shielded cable 2. The shielded cables 2 each have two inner

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LOESENBECK · STRACKE · SPECHT · DANTZ - PATENT^JkWfttTE - EUR®PE*A*4 PATENT AND TRADEMARK ATTORNEYS

Registration text dated 02.02.2000 Page 4

Conductors 6, 8, an inner insulation 10 surrounding the conductors 6, 8, a cable shield 12 surrounding the conductors 6, 8 and the inner insulation 10 and an outer insulation 14.

Two pairs of mouth-like cutting edges 16a,b; 18a,b extend inwards from the longitudinal legs of the U-shaped contact body 4, which is interrupted in sections in the longitudinal direction of the shield cable 2 in the area of the longitudinal legs, to penetrate the outer insulation 14. A contact area 20a,b; 22a,b is formed directly onto each of these, which faces outwards in sections from the cutting edges 16a,b; 18a,b. These are designed here essentially parallel to the shield cable 2 and contact the cable shield 12 over a large area.

According to Fig. 1 and 2, two of the cutting edges 16a, 16b; 18a, 18b and the adjoining contact areas 20a, 20b; 22a, 22 are formed in pairs on the U-shaped contact body, longitudinally offset from one another. The two pairs of cutting edges 16a, 16b; 18a, 18b point away from one another, rotated by 180° to one another.

According to Fig. 3 and 4, however, two of the cutting edges 16a, 16b; 18a, 18b and the adjoining contact areas 20a, 20b; 22a, 22 are formed in pairs on the U-shaped contact body, directly opposite one another on the circumference of the shield cable 2.

Solder pins 24 on the underside of the clamping body 4 enable mounting on or assembly of a circuit board.

LOESENBECK · STRACKE · SPECHT · DANTZ - PATENT LAW - EULA ATTORNEYS

Registration text from 02.02.2000

Reference symbol

Shield cable

Contact body

Director

insulation

Cable shield

insulation

Cut

Contact area

6.8

10

12

14

16a,b; 18a,b

20a,b; 22a, b

Claims (10)

1. Cutting connection device for shield cable, - preferably for shielded cables with at least one inner conductor, an inner insulation surrounding the conductors, a cable shield surrounding the conductors and the inner insulation and an outer insulation, - which has a U-shaped contact body in cross-section to accommodate the shield cable, - wherein cutting edges extend inwards from the U-shaped contact body to penetrate the outer insulation,
characterized in that - a contacting region ( 20 , 22 ) which faces away from the cutting edges ( 16 , 18 ) at least in sections and which makes surface contact with the cable shield ( 12 ) is connected to the cutting edges ( 16 , 18 ). 2. Cutting connection device according to claim 1, characterized in that in the direction of the shield cable extension, longitudinally offset from the U-shaped contact body ( 4 ), at least one cutting and contacting device is designed which is non-conductively connected to the latter for penetrating the inner insulation and for contacting the at least one inner conductor ( 6 , 8 ). 3. Cutting connection device according to one of the preceding claims, characterized in that the partially U-shaped contact body ( 4 ) and/or the cutting and contacting device for penetrating the inner insulation and for contacting the at least one inner conductor ( 6 , 8 ) are provided with mounting and/or soldering pins ( 24 ) and are arranged on a circuit board or a mounting plate. 4. Cutting connection device according to one of the preceding claims, characterized in that the U-shaped contact body ( 4 ) is designed as an element of a plug which is designed to be foldable in sections, such that the contact body ( 4 ) is accessible for inserting the shield cable ( 2 ) by folding open the plug. 5. Cutting connection device according to one of the preceding claims, characterized in that the contacting areas ( 20 , 22 ) are designed such that they contact the cable shield ( 12 ) over its surface. 6. Cutting connection device according to one of the preceding claims, characterized in that the contacting areas ( 20 , 22 ) extend at least partially parallel to the shield cable ( 2 ). 7. Cutting connection device according to one of the preceding claims, characterized in that two of the cutting edges ( 16 , 18 ) and the adjoining contact areas ( 20 , 22 ) are formed opposite one another in pairs on the U-shaped contact body ( 4 ). 8. Cutting connection device according to one of the preceding claims, characterized in that two of the cutting edges ( 16 , 18 ) and the adjoining contact areas ( 20 , 22 ) are formed offset from one another in pairs on the U-shaped contact body ( 4 ). 9. Cutting connection device according to one of the preceding claims, characterized in that a plurality of the cutting edges ( 16 , 18 ) and contacting areas ( 20 , 22 ) arranged in pairs are formed on the U-shaped contact body ( 4 ). 10. Cutting connection device according to one of the preceding claims, characterized in that the two cutting edges lying opposite one another in pairs form a mouth-like cutting area.