DE202014103872U1 - Cable clip for strain relief and anti-kinking of electrical cables and wires to equipment - Google Patents

Abstract

Cable clip for strain relief and for kink protection of an electrical device connection line to an electrical device with a device housing which has a housing configuration for the electrical connection line, characterized in that the cable clip (5 or 6) consists of at least one upper shell (8) and one lower shell ( 9), the two shells (8, 9) being connectable via at least one latching hook (10) and a corresponding latching contour (14), whereby the two shells (8, 9) after inseparable latching by means of suitable clamping geometries (15) and are positively and permanently connected to the electrical connection line (2) and that the cable clip (5 or 6) has a snap-in element or a hook-in element in the direction of connection with the device housing (1), which is designed to correspond to a bushing (16).

Description

The invention relates to a clip realized by snapping onto an electrical cable or on an electrical line, the strain relief and the anti-buckling in the entry or the implementation of the cable or the line in or through a device housing.

State of the art

Electrical appliances such as electric cookers, ovens, refrigerators, microwaves, dishwashers, processing machines, personal care appliances, etc., require electrical power to function.

To ensure the power supply, most of these and other similar devices have a device connection lead as an electrical connection between the power supply system and the equipment inside wiring. Only if it works safely, the functional and electrical safety of the device can be permanently guaranteed.

However, most equipment connection cables are subject to a variety of loads due to the operating environment, their device to be supplied and their user. These negatively affect their functional safety and their service life.

• – die mechanischen Belastungen der Leitung durch Bie gen und Knicken der Leitung
• – die mechanische Belastung der Leitungsadern und der da ran angeschlossenen Gerätebauteile durch Ziehen an der Leitung

In connection with the present invention, in particular:

• - The mechanical loads on the line by bending and bending of the line
• - The mechanical stress on the wires and the device components connected thereto by pulling on the line

In order to effectively counter the resulting stresses on the device connection cable and the device to be supplied with electrical energy, device and application-specific standards have been developed and defined. These are known in the art under the generic terms kink protection and strain relief, and are implemented device-specific and application-specific differentiated.

• – Montage der Elemente vorwiegend in aufwendiger Handarbeit, kaum Automatisierung möglich
• – Zusatzelemente zur Befestigung erforderlich

Nachteile bei den angespritzten Systemen zum Knickschutz und zur Zugentlastung sind:

• – Knickschutzfunktionalität oft mangelhaft
• – Erhörter Materialeinsatz

Depending on the characteristics of the device, the cable or the cable, the operating environment, the design, etc., one can choose between a large number of technical solutions for anti-kink protection and strain relief. The anti-buckling and the strain relief can be realized by means of one or more functional units. In principle, these can be mounted on the cable or the cable or molded or mounted in the device. Disadvantages of the assembled systems for kink protection and strain relief are:

• - Installation of the elements mainly in elaborate manual work, hardly possible automation
• - Additional elements required for attachment

Disadvantages of the molded systems for kink protection and strain relief are:

• - Kink protection functionality often poor
• - Increased material usage

The problem of kink protection and strain relief for appliance connection cables to electrical appliances is not new. Thus, a variety of technical solution variants is known.

Special solutions or older solutions are often based on separate elements for strain relief and anti-kink protection.

So in the publication EP 1729390 A2 describes a device for zugsicheren introduction of cables in housings, which fixes the cable by means of clamping element in the housing.

From the publication DE 295 04 754 U1 is another element for strain relief is known, which fixes the cable between two oblique elastic ribs using a stamp device and occurring tensile forces on the cable does not affect the connected electrical components.

In publication DE 10010489 C1 a cable strain relief is described, which presses the cable sheath by means of clamping device in a cable channel, which has on its walls over widening ribs and thus produces a positive connection.

The solutions described achieve their strain relief usually by several elements to be joined together and are therefore unsuitable for effective fully automatic production.

The function of the anti-buckling can not be ensured with these solutions due to their execution. Their realization requires an additional component.

In the publication EP 1586922 B1 a bending limit is achieved by a plurality of housings, which are coupled by means of universal joint. Simultaneous strain relief can not be ensured with this solution.

The font DE 10135971 C1 describes a system consisting of a molded on cable strain relief, which is fixed via a screw in the device housing. The described solution combines anti-buckling and strain relief, but appears to be too expensive to manufacture devices in mass production and hardly automatable.

task

As cost and quality pressures continue to increase within industrial manufacturing of electrical equipment, it is critically important for any manufacturer to tap all possible cost reduction potentials without sacrificing quality.

The anti-kink protection and the strain relief for appliance connection cables of electrical devices are closely linked in terms of their effect and production.

It is therefore the object of the present invention to propose a cost-effective in production and assembly system for standard-compliant and functionally reliable realization of the strain relief and anti-kink electrical cables to devices.

This system, carried out in the form of an at least two-part mountable cable clips, to ensure the electrical functional and device security permanently while also opening up for the user of the present invention, a significant savings potential of material and assembly time.

The solution should be usable in appropriate variants for all practically occurring device feedthrough situations of the electrical device connection lines through the housing wall of the devices.

This object is achieved by a cable clip for the strain relief and the anti-buckling electrical cables and wires to devices with the features of the protection claim 1. An advantageous embodiment of the invention is specified in the dependent claims 2 to 5.

• – Realisierung der Funktionalität von Zugentlastung und Knickschutz durch ein Bauteilen
• – Verringerung von Material- und Fertigungsaufwendungen für die Zugentlastung und den Knickschutz
• – Kein technologisch aufwendiges Anspritzen der Zugentlastung und des Knickschutzes an die Leitung
• – Flexible, vollautomatische Montage an frei bestimmbare Position während der Kabelkonfektion
• – Einfaches und sicheres Einbringen des Kabelclips in Gehäuseausschnitte mit unterschiedlichen Formen
• – Anwendung eines Kabelclips für verschiedene Blechstärken
• – Automatischer Ausgleich der Toleranzen in der Blechstärke des Gerätegehäuses

Due to the design features of the proposed cable clip for strain relief and anti-buckling, the invention has a number of advantages:

• - Realization of the functionality of strain relief and kink protection by a components
• - Reduction of material and manufacturing costs for strain relief and kink protection
• - No technologically complex spraying the strain relief and the anti-buckling to the line
• - Flexible, fully automatic assembly at a freely determinable position during cable assembly
• - Easy and safe insertion of the cable clips in housing cutouts with different shapes
• - Application of a cable clip for different sheet thicknesses
• - Automatic compensation of tolerances in the thickness of the device housing

embodiment

In the following the invention with reference to several embodiments with the 1 to 6 explained in more detail. It shows:

1 a dishwasher with mounted cable clip for strain relief and kink protection of the electrical connection cable to devices.

2 a dishwasher with mounted cable clip for strain relief and kink protection of the electrical connection cable to devices in detail of the connection cable entry.

3 a mounted in a housing wall cable clip for strain relief and kink protection of the electrical connection cable to devices in detail of the sheet metal bushing.

4 a cable clip for strain relief and kink protection electrical connection cable in the device installation situation as a latching variant in front of a closed housing wall.

5 a cable clip for strain relief and kink protection of electrical connection cables in the device installation situation as a suspension variant in front of a split housing wall.

6 a cable clip for strain relief and kink protection of electrical connection cables to devices 5 in unlocked condition.

The 1 shows an example of a dishwasher with mounted cable clip 6 for strain relief and anti-kink protection for the electrical connection cable.

In the embodiments, the cable clips 5 and 6 described, which differ by their connection with the device housing. The cable clip 5 represents a latching variant and the cable clip 6 a suspension variant dar.

In 2 will the in 1 Dishwashers shown as an example are shown in detail in the area of the connection cable entry. Here is the cable clip 6 shown in the hanging variant.

In 3 the cable clip is placed in the for strain relief and kink protection Housing wall shown in detail. Shown is, as in the embodiment suspension variant of the cable clip 6 the peripheral edge 13 the tensile force of the connecting cable 2 full surface in the device housing 1 initiates and thus of the wires connected to the components of the device 4 keeps. The device connection cable goes through this 2 the opening of the shells 8th and 9 of the cable clip 6 ,

The 4 shows a cable clip 5 in variant of the strain relief and the anti-buckling as Einrastvariante in a closed housing version 7 in mounting position. Due to the rectangular housing design 7 in the housing wall 1 and the geometrically correspondingly executed with it and at one end of the cable clip 5 arranged implementation 16 becomes the cable clip 5 by means of snap hook 12 securely anchored in the device housing. The catch hooks lock 12 behind the housing 7 and those on the end side of the upper shell 8th and the lower shell 9 trained stop surface 18 attaches itself to the outside of the device housing.

Also shown is the embodiment of the anti-kink funnel 11 , which limits the bending of the device connection line to its maximum permissible value by adjusting its opening angle. In the inner area of the anti-kink funnel 11 is the device connection cable 2 through the in 6 shown clamping geometry 15 clamped.

The 5 shows the cable clip 6 as a variant of the strain relief and the anti-buckling as a hanging variant in a separable housing version 7 in mounting position. Due to the rectangular housing design 7 and the geometrically correspondingly executed, groove-shaped passage 16 The cable clip is by means of peripheral edge 13 safe in the device housing 1 anchors and thus directs the forces acting on the connecting cable tensile forces on the device housing 1 from.

For mounting the cable clip 6 must be one of the two separable surfaces of the device housing 1 to be moved that way 16 in the housing version 7 the other surface can be mounted. Subsequently, the removed surface is to be arranged again in the starting position, whereby here also the housing characteristics 7 in the implementation 16 intervenes.

In the 6 the basic structure of the cable clip is shown. The cable clip consists of two half-shells, namely an upper shell 8th and a lower shell 9 , The upper shell 8th and the lower shell 9 have corresponding locking hooks 10 and locking contours 14 on. Constructive parameterization of their closure geometry and their closure force ensures that the upper and lower shell 8th . 9 after joining are no longer to be separated and the device connection cable by means of force and form fit between its jacket and the clamping geometry 15 the upper and lower shell 8th . 9 the cable clip is securely and permanently fixed.

The two bowls 8th . 9 of the cable clips are connected to each other in such a way that they after locking in a corresponding Verrastkontur 14 the two bowls 8th . 9 by means of suitable clamping geometries 15 positive and positive with the electrical connection cable 2 permanently connect securely, so that the at the connecting line 2 occurring tensile forces over a peripheral edge 13 and / or one or more snap hooks 12 via the device housing is derived before this over the wires 4 on the device connection technology acts, and the cable clip due to a suitable geometry on the Schukowinkelstecker 3 assigned side, one beyond the load limits of the connecting cable 2 prevents bending beyond and thus ensures the kink protection for the line.

LIST OF REFERENCE NUMBERS

1

device housing

2

Device connection cable

3

schuko

4

veins

5

Cable clip Einrastvariante

6

Cable clip Einhängvariante

7

housing expression

8th

upper shell

9

lower shell

10

Verrasthaken

11

Kink protection funnel

12

snap hook

13

circumferential edge

14

Verrastkontur

15

terminal geometries

16

execution

17

dishwasher

18

stop surface

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been 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.

Cited patent literature

• EP 1729390 A2 [0010]
• DE 29504754 U1 [0011]
• DE 10010489 C1 [0012]
• EP 1586922 B1 [0015]
• DE 10135971 C1 [0016]

Claims (5)

Cable clip for strain relief and kink protection of an electrical device connection cable to an electrical device with a device housing, which has a housing design for the electrical connection line, characterized in that the cable clip ( 5 or 6 ) from at least one upper shell ( 8th ) and a lower shell ( 9 ), the two shells ( 8th . 9 ) via at least one locking hook ( 10 ) and a corresponding Verrastkontur ( 14 ), whereby the two shells ( 8th . 9 ) after inseparable locking by means of suitable clamping geometries ( 15 ) positive and positive with the electrical connection line ( 2 ) are permanently securely connected and that the cable clip ( 5 or 6 ) in the direction of connection with the device housing ( 1 ) has a latching element or a suspension element, which leads to a bushing ( 16 ) is formed correspondingly. Cable clip according to claim 1, characterized in that the cable clip ( 5 ) in the direction of connection with the device housing ( 1 ) has a latching element, such that at least one latching hook ( 12 ) and on the latch side of the upper shell ( 8th ) and the lower shell ( 9 ) a stop surface ( 18 ) is arranged. Cable clip according to claim 1, characterized in that the cable clip ( 6 ) in the direction of connection with the device housing ( 1 ) has a hooking element, in such a way that on the hooking element one of the housing ( 7 ) geometrically corresponding executed, groove-shaped passage ( 16 ) and a housing ( 7 ) recirculating peripheral edge ( 13 ) consists. Cable clip according to claim 1, characterized in that it is ensured by constructive parameterization of its closure geometry and its closure force that the upper and lower shell ( 8th . 9 ) after joining is no longer separable. Cable clip according to claim 1, characterized in that on the connecting line ( 2 ) occurring tensile forces on a peripheral edge ( 13 ) and / or one or more snap hooks ( 12 ) is dissipated through the device housing, before this over the wires ( 4 ) acts on the device connection technology.

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