DE202010010438U1 - spout - Google Patents

Abstract

Grommet (1 ') for sealing a running through a housing wall cable
comprising an outer part (2) which sealingly seals an opening in the housing wall with its outer circumference when mounted,
in addition comprising a cylinder-like sealing sleeve (3), which is intended to sealingly abut with its inner circumference on the cable and which is connected by a membrane-like part (4) with the outer part (2), wherein the sealing sleeve has an insertion opening (3a) for insertion the cable and an outlet opening (3b), and wherein the sealing sleeve (3) is closed by an escape element (5),
characterized in that
the breakout element (5) is arranged in the region of the outlet opening (3b).

Description

The The present invention relates to a spout according to the preamble of claim 1.

Technical area

spouts, as proposed in the present invention needed when components such as electrical Cable through an opening in a housing wall, performed by a sheet, a plastic wall or the like Need to become. An example of a possible Application of such spouts are openings in housings, for example of damp-proof lights, in whose Inside there are electrical operating devices. By these openings in the housing wall can the electrical equipment by means of one or more electrical cable with electrical energy and / or control information be supplied.

there may be required that the component (for example, the jacket of the cable) against mechanical damage becomes. In addition, there is often the desire that the opening is sealed in the housing wall as possible sealing. For example, if a cable is passed through a housing wall, so may be desired that the interior of the case is sealed from the outside environment, d. H. prevents, for example, dust, liquid (Water), humidity can penetrate into the interior of the case.

Tightness requirements are defined in international standards, such as the IP (Ingress Protection) Classification System, which is used in the IEC Publication 529 'Classification of degrees of protection provided by enclosures' is published. These standards specify in detail to what extent the interior of, for example, a housing should be sealed from its external environment.

State of the art

A known grommet is in the patent application US2007 / 0272429 described.

Another example of a commercially available grommet is in the 1a and 1b shown. 1a shows a cross section of a spout, in 1b there is a perspective view of the same spout. For a clearer illustration, see 1b only one half of the spout is shown.

The spout 1 has rotational symmetry with respect to an axis 1a on. Regarding a plane normal to this axis of symmetry 1a has the spout an asymmetrical shape: the term 'top' is hereinafter referred to that side of the spout from which a cable is inserted during assembly. The term "bottom" corresponds to the other side of the spout, ie the side from which the cable emerges from the spout during assembly.

The spout 1 has an outer part 2 on, which serves the fixation of the spout in the opening of the housing wall and can seal this sealing. In the present example, the outer part 2 a circumferential stop ring 2a and a circumferential sealing lip 2 B on, whereby a seal between the spout and the opening of the housing wall is achieved. An inner part of the spout 1 is through a membranous part 4 with the outer part 2 connected. In this example, the inner part is as a sealing sleeve 3 educated. The sealing sleeve 3 encloses inside the cable and seals the grommet with respect to the cable (the cable is in the 1a not shown, it runs in the direction of the axis 1a ). The sealing sleeve has an insertion opening 3a for insertion of the cable (pointing in 'up' direction) and an outlet opening 3b (in the direction 'down').

In In many cases, those are for receiving the spout provided openings (holes) of the housing wall already made during the production of the case and closed in advance with spouts. Only after delivery The electrician will then contact the customer and final assembly on site the electrical installation is carried out and as needed the required cables are carried through the grommets. It may happen that not every spout is used is, d. H. not a cable through each grommet becomes. It is therefore usually required that a grommet an opening in the housing wall then tight can complete if later no cable through the spout is performed.

This requirement is taken into account in the prior art in that the spout with a disc-shaped Ausbruchselement (Butzen) 5 is closed. This breakout element 5 is by means of an annular predetermined breaking point 5a with the insertion opening 3a the sealing sleeve 3 connected. The annular predetermined breaking point 5a has a thinner wall thickness than the breakout element 5 , If now a cable from 'top' to 'bottom' passed through the spout or the spout mechanically opened (for example by means of a screwdriver), so is the predetermined breaking point 5a provided that the breakout element preferably at the predetermined breaking point 5a is separated.

In practical application, it now turns out that the grommets described in the introduction only insufficiently meet the requirements for tightness according to the various IP classifications. It can happen that, for example, water penetrates through an opening in the housing in the space between the cable and spout.

Technical OBJECT AND DESCRIPTION OF THE INVENTION Starting point of the considerations according to the invention is the observation that in the state of the art in practical terms Use when inserting the cable in isolated cases the breakout element is not completely at the predetermined breaking point is separated. This can now lead to problems with tightness: If the breakout element at one point with the sealing sleeve remains connected and to lie between cable and sealing sleeve comes (gets trapped), so seals the spout insufficiently.

outgoing From the aforementioned prior art, it is an object of the invention to propose a spout that faces the stand the technology higher (more demanding) tightness requirements enough.

The Task is inventively by a grommet solved with the features of claim 1. advantageous Further developments of the invention are in the appended subclaims described or can be taken from the description below and the exemplary embodiments.

According to the invention a grommet for sealing a through a housing wall extending cable, which has an outer Part with an opening in the housing wall with mounting its outer periphery sealingly closes an opening, and a sealing sleeve which is intended with its inner circumference sealingly abut the cable. It will continue According to the invention proposed that the sealing sleeve an insertion opening for insertion of the Cable and having an outlet opening, wherein the sealing sleeve is closed by an outbreak element, which in the field of Outlet opening is arranged.

By this inventive arrangement of the breakout element will prevent the breakout element between the cable and the sealing sleeve too lie comes. The spout of the invention Therefore, even in the case that the eruption element in the Installation of the cable is not completely disconnected.

following the invention is based on advantageous embodiments and simplified drawings explained in more detail. It demonstrate:

1a and 1b Views of a known from the prior art spout;

2a a cross section of a first embodiment of the nozzle according to the invention;

2 B a perspective view of in 2a illustrated grommet.

2a shows a preferred embodiment of the nozzle according to the invention. The spout 1' is shown in cross section. 2 B shows a perspective view of in 2a shown spout, for clarity, only one half of the spout is shown. In the example shown here, the grommet is rotationally symmetric with respect to an axis 1a executed. The spout 1' can be constructed of rubber-elastic (elastomeric) material.

The variant of the spout presented here 1' has an outer part 2 on. This outer part serves to fix the grommet in the opening of the housing wall. In addition, this part is used so that the spout sealingly closes the opening on its outer circumference. In the example shown here, the outer part 2 a circumferential stop ring 2a and a circumferential sealing lip 2 B on. There are, of course, alternative constructions of the outer part 2 possible, which cause a similar (sealing) effect.

A sealing sleeve 3 encloses a cable in its inner circumference and seals the grommet with respect to the cable (the cable is in the 2a not shown, it runs in the direction of the axis 1a ). In the example presented here is the sealing sleeve 3 through a membranous part 4 with the outer part 2 connected, wherein the membranous part 4 engages in the area of an insertion opening described in more detail later. Due to the elasticity of the material, the sealing sleeve (snugly) can cling to the cable and flexibly adapt to cables with different diameters. The sealing sleeve 3 has an insertion opening 3a (pointing in 'up' direction) to insert the cable and an exit port 3b (pointing in the direction of 'down').

So that the spout also seals, if no cable is passed through it, the spout is with a disc-shaped Ausbruchselement (Butzen) 5 locked.

According to the invention is now the breakout element 5 in the area of the outlet opening 3b arranged. The breakout element 5 can by means of an annular predetermined breaking point 5a which has a thinner wall thickness than the breakout element 5 having, with the outlet opening 3a the sealing sleeve 3 be connected.

This construction now has decisive advantages: due to the recessed arrangement of the breakout element 5 At the 'lower' end of the sealing sleeve ensures that the breakout element 5 Do not get caught between the sealing sleeve and the cable can. The breakout element 5 can not be trapped even if the breakout element only folds away during insertion of the cable and is not completely separated by the cable.

A further advantageous effect of this invention Arrangement is that the breakout element preferably only by the insertion of the cable can be separated. It is usually no additional step such as this manual cutting away the breakout element (for example by means of a knife) or previous manual opening (piercing) with a solid object (for example by means of a screwdriver) necessary.

In the in the 2 embodiment shown has the spout 1' a continuous rotational symmetry with respect to the axis 1a on. The axis 1a is through the center axis of the sealing sleeve 3 given, it corresponds substantially to the center line of the running through the spout cable.

By continuous rotational symmetry is meant that the spout is rotated about an axis 1a can be brought to an infinitesimal or arbitrary angle in accordance with the initial shape.

Alternatively, Tüllenformen are conceivable, which do not have this continuous rotational symmetry, but with respect to an axis 1a have only a discrete rotational symmetry or no symmetry.

Under Spouts with a discrete rotational symmetry are spout shapes to understand that only when turning around a finite (not infinitesimal) or certain angles in agreement can be brought to the initial shape. This is For example, meant spout shapes in which the contour in plan view from above is not circular around, but has the shape of a regular polygon.

Under The term rotational symmetry will be referred to hereinafter as both forms with continuous as well as forms with discrete rotational symmetry be understood.

In a further preferred embodiment, the outer part 2 be rectangular or polygonal in plan view.

The sealing sleeve is preferred 3 cylindrical, ie circular in cross section. In an alternative embodiment, the sealing sleeve 3 be formed in cross-section also rectangular or polygonal or have the shape of a regular polygon.

In a further advantageous embodiment, the sealing sleeve can be tubular with a conical cross section, ie in the insertion opening region 3a For example, the inner diameter of the sealing sleeve may be the largest and the outlet opening 3b rejuvenate (get smaller).

In further developments of the invention Tüllenformen are conceivable in which the outer part of a different symmetry with respect to an axis 1a as the sealing sleeve has. For example, the contour of the outer part 2 in plan view have substantially the shape of a regular polygon (discrete rotational symmetry), whereas the sealing sleeve may be cylindrical (with respect to the axis 1a have a continuous rotational symmetry).

According to the invention Such spouts are used to seal openings in Enclosures containing electrical equipment are located. Electrical operating equipment, located inside of the housing must be by means of electrical Cable to be supplied with electrical energy / control information.

A advantageous application of the invention is the use of spouts in luminaire housings, in particular for sealing damp-proof luminaires.

The present inventive spout has been with respect to one through an opening in a housing wall extending electrical cable presented. At this point be but expressly pointed out that the inventive Not only grommet for this one featured application suitable, but suitable for all applications is where to solve an analogous sealing problem: for example if a hose, cable, linkage, etc. through an opening must be passed and sealed the opening shall be.

1

spout

1'

spout

1a

axis

2

outer part

2a

stop ring

2 B

sealing lip

3

sealing sleeve

3a

insertion

3b

outlet opening

4

membranous part

5

outbreak element (Slugs)

5a

Breaking point

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited non-patent literature

• - IEC Publication 529 'Classification of degrees of protection provided by enclosures' [0004]

Claims (8)

Grommet ( 1' ) for sealing a cable running through a housing wall, comprising an outer part ( 2 ), which sealingly seals an opening in the housing wall with its outer circumference during assembly, in addition comprising a cylinder-like sealing sleeve ( 3 ), which is intended to sealingly abut with its inner circumference on the cable and which by a membrane-like part ( 4 ) with the outer part ( 2 ), wherein the sealing sleeve has an insertion opening ( 3a ) for inserting the cable and an outlet opening ( 3b ), and wherein the sealing sleeve ( 3 ) by an outbreak element ( 5 ) is closed, characterized in that the outbreak element ( 5 ) in the region of the outlet opening ( 3b ) is arranged. Grommet according to claim 1, characterized in that the membranous part ( 4 ) in the region of the insertion opening ( 3a ) on the sealing sleeve ( 3 ) attacks. Grommet according to claim 1 or 2, characterized in that the eruption element ( 5 ) by means of a predetermined breaking point ( 5a ) with the sealing sleeve ( 3 ) connected is. Grommet according to one of the preceding claims, characterized in that the sealing sleeve ( 3 ) is cylindrical or rectangular in cross-section or polygonal. Grommet according to one of the preceding claims, characterized in that the outer part ( 2 ) is rectangular or polygonal in plan view. Grommet according to one of the preceding claims, characterized in that the spout rotationally symmetrical with respect to an axis ( 1a ), which through the central axis of the sealing sleeve ( 3 ) given is. Grommet according to one of the preceding claims, characterized in that the spout ( 1 ) is constructed of elastomeric material. Luminaire housing with a housing wall, which has an opening, and a nozzle sealing the opening ( 1 ) according to one of the preceding claims.