DE102021103861A1 - Strain relief for electrical cables - Google Patents

Abstract

The invention relates to strain relief for electrical cables to relieve the strain on connection points between the lines of a connection cable (1) and an electrical or electronic component (4). Electronic component (4) to prevent tensile loads. The object is achieved according to the invention with a strain relief in which a capillary (2) made of an insulating material is arranged at the end of a connecting cable (1), the axial through holes (2.1) and at their Outer surface has slots (2.2), cable conductors (1.1, 1.2) of the connecting cable (1) being guided through the bores (2.1), and the ends of the cable conductors (1.1, 1.2) being bent over and protruding into the slots (2.2), and the ends of the cable conductors (1.1, 1.2) being electrically conductively connected to connecting wires (4.1, 4.2) of an electronic component (4). are.

Description

The invention relates to strain relief for electrical cables to relieve the strain on connection points between the lines of a connecting cable and an electrical or electronic component.

Strain relief devices for electrical cables are known in the prior art. Strain reliefs of this type are provided on electrical devices in order to hold a connection cable on the electrical device, to maintain the connection between the lines of the electrical cable and the electrical connection terminals on the device, so that the electrical connection between the lines of the electrical cable is not stressed on the device becomes.

For example, in DE 10 2015 112 045 B4 a strain relief for electrical cables is described, in which a cable clamp consists of two opposing parts which define a space in which the electrical cable can be clamped, the two parts being able to be fixed with a screw at different distances from one another in order to insert cables with different cross-sections into the being able to pinch the gap.

Furthermore is off DE 24 47 367 A1 a strain relief for electrical cables is known, wherein a strain relief plate is arranged in a device plug, which is provided with cams to guide the wires.

In EP 0 859 252 B2 describes a connector for an optical fiber cable that includes a tubular strain relief whose internal cavity is sized to slidably receive a jacketed optical fiber cable. The shroud has a conical configuration with spaced elongate slots into which projections project into the lumen of the shroud.

These projections press on the fiber optic cable and fix it against displacement.

All of these known strain reliefs are not suitable for components with thin conducting wires.

The object of the invention is to prevent thin current-carrying connecting wires from connected electronic components from being torn off in the event of tensile loads, temperature fluctuations and vibrations in a moisture-tight manner.

The object is achieved according to the invention by a tensile load with the features mentioned in claim 1.

Advantageous configurations of the invention are the subject matter of the dependent claims.

In the case of the strain relief according to the invention, a capillary made of an insulating material is arranged at the end of a connecting cable, which capillary has axial through bores and slots on its outer surface. The cable conductors of the connecting cable are routed through the holes in the capillary, with the ends of the cable conductors being bent over and protruding into the lateral slots. In this case, the ends of the cable conductors are electrically conductively connected to connection wires of an electronic or electrical component.

This ensures that mechanical stress caused by pulling and temperature fluctuations on the cable are kept away from the thin connection wires and their connection points with the cable lines. Such cases of stress occur particularly in the case of stretchable connection lines for miniaturized electronic components, which are additionally provided with flexible insulation to protect against moisture.

An advantageous embodiment provides for the connecting wires to be provided with bent sections in the area between the ends of the cable conductors and the entrance into the electronic component.

In a further advantageous embodiment, the area between the end of the connection cable and one end of the electronic component is enclosed by a cover. It is possible that the sheathing is formed by a component of the outer insulation of the connection cable.

The casing protects the sensitive, thin connecting wires from being touched and damaged, as well as from the ingress of moisture.

In a further advantageous embodiment, a cam is attached to the end of the electronic component that faces the connection cable. This ensures a distance between the connecting wires and prevents the connecting wires from touching and thus causing a short circuit.

Exemplary embodiments of the invention are explained in more detail below with reference to drawings.

• 1 einen Teilschnitt durch die Zugentlastung mit elektrischen Anschlussleitungen,
• 2 eine perspektivische Darstellung der Zugentlastung und
• 3 eine perspektivische Darstellung der Kapillare.

Show in it:

• 1 a partial section through the strain relief with electrical connection cables,
• 2 a perspective view of the strain relief and
• 3 a perspective view of the capillary.

Corresponding parts are provided with the same reference symbols in all figures.

Out of 1 the overall arrangement can be seen. At the end of the connection cable 1 there is a capillary 2 made of an insulating material. The cable conductors 1.1 and 1.2 protrude from the end of the connection cable 1 . The conductor ends are drilled through 2.1 (in 3 shown), which run axially through the capillary 2, guided and bent. The bent ends of cable ladders 1.1 and 1.2 are fitted with slots 2.2 (in 2 shown) added, which are attached to the outer surface of the capillary 2. Connecting wires 4.1 and 4.2 of an electronic component 4 are electrically conductively connected to the ends of the cable conductors 1.1 and 1.2. The connecting wires 4.1 and 4.2 have bent sections in the area between the ends of the cable conductors 1.1 and 1.2 and the entry into the electronic component 4. This allows the electronic component 4 to move slightly relative to the capillary 2, which is particularly advantageous for the assembly of the arrangement. The area between the end of the connecting cable 1 and the end of the electronic component 4 is surrounded by a sheath 3 which can also be flexible. The sheath 3 can also be part of the outer insulation of the connection cable 1 .

2 shows the structure of the strain relief in a perspective view. From the illustration it can be seen that the bent ends of the cable conductors 1.1 and 1.2 with the connecting wires 4.1 and 4.2 connected to them are accommodated in the slots 2.2 of the capillary 2. The electrical connection points of the electrical conductors with the sensitive thin connection wires 4.1 and 4.2 are thus protected against damage. It can also be seen here that a cam 4.3 is attached to the end of the electronic component 4 which faces the connecting cable 1, which cam ensures a spacing between the connecting wires 4.1 and 4.2 and thus prevents a short circuit.

In 3 the capillary 2 is shown in perspective. It consists of a cylindrical body through which bores 2.1 run and which has slots 2.2 on the outer casing. As described above, the cable conductors 1.1 and 1.2 pass through the bores 2.1 and their bent ends are received in the slots 2.2. The capillary 2 consists of an insulating material. Plastics or porcelain can preferably be used for this purpose. When the connection cable 1 is pulled, the forces are absorbed by the capillary 2 and are kept away from the sensitive, thin connection wires 4.1 and 4.2. The forces are diverted by 180 degrees.

Reference List

1

connection cable

1.1, 1.2

cable ladder

2

capillary

2.1

drilling

2.2

slot

3

wrapping

4

electronic component

4.1, 4.2

connecting wires

4.3

cam

QUOTES INCLUDED IN DESCRIPTION

This list of the documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• DE 102015112045 B4 [0003]
• DE 2447367 A1 [0004]
• EP 0859252 B2 [0005]

Claims (5)

Strain relief for electrical cables for relieving the connection points between the lines of a connection cable (1) and an electrical or electronic component (4), characterized in that a capillary (2) made of an insulating material is arranged at the end of a connection cable (1), which has axial through bores (2.1) and slots (2.2) on its outer surface, cable conductors (1.1, 1.2) of the connection cable (1) being guided through the bores (2.1), and the ends of the cable conductors (1.1, 1.2) being bent over and protrude into the slots (2.2), and the ends of the cable conductors (1.1, 1.2) are electrically conductively connected to connecting wires (4.1, 4.2) of an electronic component (4). strain relief after claim 1 , characterized in that the connection wires (4.1, 4.2) in the area between the ends of the cable conductors (1.1, 1.2) and the entry into the electronic component (4) have bent sections. strain relief after claim 1 or 2 , characterized in that the area between the end of the connecting cable (1) and one end of the electronic component (4) is enclosed by a sheath (3). strain relief after claim 3 , characterized in that the sheath (3) is part of an insulation of the connection cable (1). Strain relief according to one of the preceding claims, characterized in that a cam (4.3) is attached to the end of the electronic component (4) which faces the connection cable (1).

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