EP2182528A2 - Device for securing a load resistor - Google Patents

Abstract

The resistor has a resistor coil (1) embedded in a highly compressed insulated package (10). A metal casing pipe (5) is arranged in a hollow chamber (12) of a cooling body (13) made of aluminum alloy. The hollow chamber is adjusted with respect to the cross-section and length of the metal casing pipe. The metal casing pipe is axially fixed by radial fixing elements (20) such that the metal casing pipe is moved in the chamber depending on temperature without changing axial position by the fixing elements. The fixing elements project the cross-sectional profile of the metal casing pipe.

Description

The invention relates to a device for fastening a load resistor provided with a metal housing by means of screws, rivet elements or the like. Fastening means on a mounting surface.

It is known that load resistors of the type in question are designed to absorb high peak loads and thereby convert electrical peak values into heat, which is dissipated via the metal housing to the environment.
Usually, the metal housing of such load resistors are fastened by means of screws to existing mounting surfaces, for example in control cabinets. It has however, it has been shown that such fasteners do not hold permanently and the screws rip and / or disengage due to the pulsatile peak loads. Also rivet bolts, which are used instead of screws, can loosen or tear.

The invention has for its object to provide a simple and inexpensive device of the type mentioned, by which the risk of the automatic release of the metal housing or the load resistance is avoided by the mounting surface.

This object is achieved according to the invention by a mounting part producing the connection to the mounting surface, which has at least one connecting element with at least one engagement profile which engages at least partially in at least one receiving profile of at least one outer side of the metal housing designed as a counterprofile in positive and / or non-positive and elastically yielding manner.

This type of fastening according to the invention ensures that the peak loads which occur in the manner of a pulse and lead to short-term or frequent thermally induced volume changes of the metal housing can not adversely affect the fastening means connecting the metal housing to the mounting surface. The disadvantages of self-loosening or loosening which occur again and again in the conventional rigid types of fastening are thus completely eliminated. On the screws or rivets, by which the mounting member is attached to the mounting surface, the thermal volume changes of the metal housing can not exert any adverse influence. Due to the resilient connecting elements, the volume changes of the metal housing enclosing the load resistance are absorbed and compensated, without additional or damaging clamping, pushing or shearing forces occurring on the fastening means themselves.

Since the metal housings may have different shapes and in particular structures of their outer surfaces, it is necessary to provide the mounting part according to the invention in different, adapted to the respective shapes of the metal housing embodiments.

Advantageous embodiments of the invention, in particular of the mounting part, are the subject of the dependent claims 2 to 14.

The invention will be described below with reference to the drawing Fig. 1 to 18 explained in more detail.

Fig. 1

in isometrischer Darstellung einen Lastwiderstand in Flachbauweise;

Fig. 1a und 1b

in isometrischer Darstellung zwei gleiche Montageteile zur Befestigung des Lastwiderstandes der Fig. 1, wobei Fig. 1a vergrößert dargestellt ist;

Fig. 2

in Schnittdarstellung eine mit dem Montageteil der Fig. 1a in Eingriff stehende Befestigungslasche des Metallgehäuses des Lastwiderstandes der Fig. 1;

Fig. 3

in isometrischer Darstellung eine andere jedoch gleich wirkende Ausführungsform des Montageteils;

Fig. 4

in gleicher Darstellung das Verbindungselement des Montageteils aus Fig. 3 als Einzelteil;

Fig. 5

in Schnittdarstellung die mit dem Montageteil der Fig. 3 in Eingriff stehende Befestigungslasche des Lastwiderstand der Fig. 1;

Fig. 6

in teilweise geschnittener Stirnansicht ein Metallgehäuse mit glatten Außenseiten und einem vertikal abgesetzten Boden;

Fig. 7

einen Schnitt VII -VII aus Fig. 6;

Fig. 8

in isometrischer Darstellung einen Abschnitt eines in Standardbauweise aufgebauten Lastwiderstandes mit einem auf seinen Außenflächen rippenartige und rillenartigen Strukturen aufweisenden Metallgehäuse;

Fig. 9

in isometrischer Darstellung ein zur Befestigung des Lastwiderstands der Fig. 8 geeignetes Montageteil;

Fig. 10

in teilweise geschnittener Stirnansicht den mit dem Montageteil der Fig. 9 in Eingriff stehenden Lastwiderstand der Fig. 8;

Fig. 11

das Montageteil der Fig. 9 in Stirnansicht;

Fig. 12

einen Schnitt XII - XII aus Fig. 11;

Fig. 13

einen Schnitt XIII - XIII aus Fig. 12;

Fig. 14

in isometrischer Darstellung einen Abschnitt des Lastwiderstandes in Standard-Bauweise mit seitlichen Ausschnitten für die Verbindungselemente;

Fig. 15

einen vergrößerten Ausschnitt XV aus Fig. 14;

Fig. 16

einen vergrößerten Ausschnitt XIV aus Fig. 10;

Fig. 17

in der Darstellungsweise der Fig. 12 einen Teil eines Lastwiderstandes in Standard-Bauweise mit anderen Eingriffsmitteln für die Verbindungselemente;

Fig. 18

den Teil des Lastwiderstandes aus Fig. 15 in Eingriff mit einem Montageteil der Fig. 9 bis 14;

Fig. 19

einen vergrößerten Ausschnitt IXX aus Fig. 18; und

Fig. 20

in vergrößerter Stirnansicht den Eingriff zwischen einer Federzunge des Montageteils und dem Metallgehäuse des Lastwiderstandes der Fig. 18;

Fig. 21

in teilweise geschnittener Stirnansicht einen Lastwiderstand mit glatten Gehäuseaußenflächen in Eingriff mit einem Montageteil entsprechend der Fig. 9 und

Fig. 22

einen Schnitt XXII - XXII aus Fig. 21.

It shows:

Fig. 1

in isometric view a load resistance in flat construction;

Fig. 1a and 1b

in an isometric view of two identical mounting hardware for attaching the load resistor of Fig. 1 , in which Fig. 1a is shown enlarged;

Fig. 2

in sectional view one with the mounting part of Fig. 1a engaged fastening tab of the metal housing of the load resistor Fig. 1 ;

Fig. 3

in an isometric view of another but equally effective embodiment of the mounting member;

Fig. 4

in the same representation of the connecting element of the mounting part Fig. 3 as a single item;

Fig. 5

in sectional view with the mounting part of Fig. 3 engaged fastening tab of the load resistor Fig. 1 ;

Fig. 6

in partially sectioned front view of a metal housing with smooth outer sides and a vertically stepped bottom;

Fig. 7

a section VII -VII from Fig. 6 ;

Fig. 8

an isometric view of a portion of a standard construction constructed load resistor having on its outer surfaces rib-like and groove-like structures having metal housing;

Fig. 9

in isometric view a for fixing the load resistance of Fig. 8 suitable mounting part;

Fig. 10

in partially sectioned front view with the mounting part of Fig. 9 engaged load resistance of Fig. 8 ;

Fig. 11

the mounting part of Fig. 9 in front view;

Fig. 12

a section XII - XII off Fig. 11 ;

Fig. 13

a section XIII - XIII Fig. 12 ;

Fig. 14

an isometric view of a portion of the load resistor in standard design with side cutouts for the fasteners;

Fig. 15

an enlarged section XV Fig. 14 ;

Fig. 16

an enlarged section XIV Fig. 10 ;

Fig. 17

in the representation of the Fig. 12 a part of a load resistor in standard construction with other engagement means for the connecting elements;

Fig. 18

the part of the load resistor Fig. 15 in engagement with a mounting part of Fig. 9 to 14 ;

Fig. 19

an enlarged section IXX Fig. 18 ; and

Fig. 20

in enlarged front view the engagement between a spring tongue of the mounting member and the metal housing of the load resistor of Fig. 18 ;

Fig. 21

in partially sectioned end view a load resistance with smooth housing outer surfaces in engagement with a mounting member according to Fig. 9 and

Fig. 22

a section XXII - XXII off Fig. 21 ,

In Fig. 1 is a simplified representation of a so-called. Flat load resistor 1 is shown, of which, however, only the electrical components completely enclosing metal housing 2 is visible. This metal housing 2 is usually made of stainless steel or an aluminum alloy and is pressed flat side. On the representation of the electrical connections has been omitted here, because they are not essential to the invention.
The on its top and / or bottom to increase the surface and to achieve a certain stiffening with longitudinal grooves 3 and longitudinal ribs 4 provided housing body is provided in this construction at its two front ends each with fastening tabs 5 and 6, which is an extension of the Housing bottom 5 represent '. In the middle of these fastening tabs 5 and 6 are each rectangular recesses. 7 and 8. These recesses 7 and 8 each have two mutually parallel and longitudinally extending marginal edges 9 and 10, which are resiliently engageable with below described in detail engagement profiles of connecting elements.

For fastening such a load resistor 1 on or on a mounting surface 11 (FIG. Fig. 2 . 6 and 7 ) are two in the Fig. 1a and 1b shown, the same design mounting parts 12 and 13 are provided, which are each formed support bow-like.

The mounting surface 11 may be, for example, the inner surface of a housing bottom or a housing wall of a control cabinet od. Like. Be. In any case, the load resistor 1 should either be mounted in a horizontal or vertical position and also on an inclined plane.
Such a mounting part 12 or 13 may, as in Fig. 1a and Fig. 1b represented, integrally formed of a metal sheet. It has between two lateral, in a common (horizontal drawing) horizontal mounting surface foot plates 14 and 15 in a relation to the common mounting plane (in the drawing vertically offset) Level at two (drawing) vertical support walls 16 and 17 a parallel to the mounting plane, ie to the foot plates 14 and 15 extending support plate 18. The mounting plane, which is not specifically shown in the drawing, is identical to the mounting plane 11, which may be, for example, the top of a mounting plate 20 or the wall surface of a cabinet.

The support plate 18 has in its center a cutout 19 which is provided with two mutually opposite connecting elements 21 and 22. These connecting elements 21, 22 each have an S-shaped cross-sectional shape, and they are symmetrical to a vertical center plane 23 (FIG. Fig. 2 ) arranged. When opposing spring tongues are formed, these connecting elements 21, 22 each have V-shaped engagement profiles 24 and 25 (FIG. Fig. 2 ), which are adapted to the receiving them counter profiles of the metal housing 2. In this embodiment of the Fig. 1 to 2 These counter profiles are formed by the marginal edges 9 and 10 of the two recesses 7 and 8, like that Fig. 2 is recognizable.

The width b of the recesses 7 and 8 is selected so that the two marginal edges 9 and 10 each in vertical Direction from top to bottom over the opposing fasteners or spring tongues 21, 22 and the engagement profiles 24, 25 can be pushed so that the two engagement profiles 24 and 25, the marginal edges 9 and 10 of the recesses 7 and 8 respectively in the in Fig. 2 form positively or non-positively absorb, and thus produce a resilient connection between the mounting tabs 5 and 6 and the support plate 18 of the mounting member 12 and 13 respectively.

In the in the Fig. 1a, 1b and 2 illustrated embodiment of the mounting member 12 and 13, the two opposing spring tongues 21 and 22 are integrally cut out of the support plate 18 and by embossing with the described and illustrated cross-sectional profiles, ie provided with the engagement profiles 24, 25. Because the connecting elements 21, 22 designed and used as spring tongues are formed integrally from the metal sheet of the mounting part 12, 13, this metal sheet should have at least minimum spring properties, so that an elastic connection can be created between the metal housing 2 of the load resistor 1 and the mounting parts 12, 13 ,

The foot plates 14 and 15 are each provided with slot-shaped openings 29, which serve to receive fastening screws 48, by means of which a mounting part 12 or 13 can be mounted on or on a mounting surface 11 of any component. Depending on the nature of the component forming the mounting surface 11, suitable screws or other fastening means, such as rivets, rivets or the like may be used.

In the in the Fig. 3 to 5 shown mounting part 13/1, which has substantially the same shape as the mounting parts 12 and 13, the two engagement profiles 24 and 25 are part of a resilient sheet metal expansion clip 31. The engagement profiles 24, 25 are arranged so that they are symmetrical a vertical center plane 23 'facing. The respective legs 32 and 33, which extend obliquely downwards towards one another, of this expansion clamp 31 are integrally connected to a flat central part 34, which is fastened centrally on the support plate 18/1 by means of screws 35, rivets or other suitable fastening means. Again, the engagement profiles 24 and 25 are designed so that they resiliently into the recesses 7 and 8 can be introduced to their peripheral edges 9 and 10 in the in Fig. 5 shown manner with a certain bias to press resiliently against the surface of the support plate 18/1 and thus to connect the metal housing 2 resiliently with the mounting hardware 13/1 when used instead of the mounting hardware 12 and 13.

In order to give the metal housing 2 or the attachment tabs 5 and 6 the opportunity to move relative to the longitudinally immovably fixed mounting parts 12 and 13 or 13/1 in the case of operational volume changes or length changes, it is expedient and advisable to use the recesses 7 and 8 to be dimensioned in the longitudinal direction so that the engagement profiles 24 and 25 or spring tongues 21 and 22, respectively, which engage with the marginal edges 9 and 10 have corresponding clearance. In other words, the marginal edges 9 and 10 should have a length b2 which is greater than the length b1 of the spring tongues 21, 22 or the engagement profiles 24, 25. Moreover, when mounting the mounting parts 12, 13 or 13/1 thereon be taken to ensure that the center distance a1 of two mounting parts 12 and 13 or 13/1 and 13/1 at least approximately the center distance a of the two recesses 7 and 8 corresponds. In this way it can be ensured that changes in length of the metal housing 2 can not adversely affect the fixings of the two mounting members 12 and 13 or 13/1.

Because the trained as a spring tongues connecting elements 21, 22 on the one hand in a simple manner with the recesses 7, 8 and their marginal edges 9, 10 engage, but on the other hand can be solved by these, this type of attachment ensures not only an easy to manufacture and Reliable connection between the load resistor and any mounting surface, but also a favorable interchangeability.

In the in the Fig. 6 to 10 as well as 14 to 20 load resistors only partially shown isometrically 1/1 are load resistors of a kind standard construction. The electrical components of these load resistors are 1/1 in a rectangular, arranged upright chamber 53 of a multi-walled metal housing 2/1 or 2/2 arranged, but not shown in the drawing.

The metal housing 2/1 is provided with four outer walls, namely two vertical side walls 61, 62 with smooth outer sides, as well as with an upper lid wall 63 and with a lower floor 64. Also, the top wall 63 and the bottom 64 have smooth outer surfaces. Immediately above the floor is a cavity 65. In this type of metal housing 2/1 for receiving the formed as a spring tongues connecting elements of the mounting members 12 and 13 serving recesses 7 and 8 are arranged with their edges 9 and 10 directly in the bottom 64, such as it from the 6 and 7 is apparent. The spring tongues 21 and 22 and their Eingriffsprofile 24, 25 protrude freely into the cavity 65. Regarding the dimensions b1 and b2 of the connecting element 21, 22 on the one hand and the recesses 7 and 8 on the other hand and their center distances apply the above rules. So that the same, above-mentioned fastening and mounting advantages can be achieved with this embodiment.

That in the Fig. 8 to 10 and 14 partially shown metal housing 2/2 is provided on all four outer sides with cooling ribs or with rib-like and / or groove-like structural elements 40, wherein these structural elements 40 mainly to improve the heat transfer to the environment. Also in this embodiment, the electrical part of the load resistor is in a central, all-round chamber 53rd
The above-mentioned problem that direct attachments of the metal housing by means of screws, rivets or the like. The pulse-like peak loads not withstand, there is also in this type of load resistors. In order to enable a suitable attachment for this type of load resistors, mounting parts 12/1 are provided, which are each provided on the upper side with connecting elements 21, 22, which positively and / or non-positively and elastically yielding at least partially into the structural elements 40 of the metal housing 2 /. 2 of a load resistor 1/1 or 1/2 can intervene.

That in the Fig. 9 and 11 and 12 shown as an item mounting part 12/1 has the same basic structure as the mounting parts already described 12, 13 and 13/1. Between the two Fußlaschen 14 and 15 is located on two vertical support walls 16 and 17, a horizontal support plate 18, which are opposite the mounting plane in which the two Fußlaschen 14 and 15, is offset upwards. For stiffening the support plate 18 between the support walls 16 and 17 respectively downwardly bent stiffening aprons 26 and 27 are provided. On the upper side of the support plate 18, two vertically extending, to a vertical center plane 23 'symmetrically arranged connecting elements 21 and 22 are arranged in the form of spring tongues, which preferably have at their upper ends preferably V-shaped engagement profiles 24, 25.

These connecting elements 21, 22 with the mutually facing engagement profiles 24, 25 are intended to intervene positively and / or non-positively and elastically yielding at least partially in the structural elements 40 of the metal housing 2/2, to this metal housing 2/2 with the mounting part 12/1 connect to.

The two connecting elements 21, 22, hereinafter referred to as spring tongues 21, 22, are an integral part of a bottom plate 27, which preferably consists of a metal sheet with resilient properties. The bottom plate 27 can in principle be fastened to the carrier plate 18 with any desired fastening means. In the present embodiment, this bottom plate 27 with a plurality of downwardly pronounced spring tabs 28, which can be guided through corresponding openings 30 of the support plate 18, to grip the support plate 18 by clamping after appropriate transverse displacement in the direction of the arrow 50 ( Fig. 11 ). This makes it possible to attach the bottom plate 27 with the two spring tongues 21 and 22 in a very simple manner and easily replaceable on the mounting part 12.
To secure the bottom plate 27 on the support plate 18 of the mounting part 12/1, the bottom plate 27 is additionally provided with a downwardly projecting into an opening 30 'of the support plate 18 locking tongue 39. This locking tongue 39 prevents him from in Fig. 11 illustrated blocking position a movement of the bottom plate 27 in the direction of the arrow 51, which is required for releasing the bottom plate 27 of the support plate 18. For intended release of the bottom plate 27 of the support plate 18, the locking tongue 39, however, can be lifted from the bottom up from the locked position, ie, out of the opening 30 ', so that their blocking function is canceled.

The spring tongues 21 and 22 are arranged with their engagement profiles 24 and 25 and designed so that, as in Fig. 10 shown, the engagement profiles 24 and 25 form- and frictionally engage around the respective bottom rib 37 and 38 of the metal housing 2/1 from the two opposite sides, ie engage with the structural elements 40 of the metal housing 2/2.

How out Fig. 6 . 12 and 13 it can be seen, in addition, the ribs 41 and 42 respectively arranged directly above the ribs 37 and 38 are provided with recesses 43 which can receive the engagement profiles 24 and 25 of the spring tongues 21 and 22 in a form-fitting manner. The recesses 43, which are arranged symmetrically opposite one another on both longitudinal sides of the metal housing 2/1, respectively form abutment surfaces 44 and 45 which receive the upper end legs 24 'and 25' of the engagement profiles 24 and 25 between them and as movement stops in the longitudinal direction of the Metal housing 2/1 can serve.

Here, too, the width b2 of the recesses 43 is slightly larger than the width b1 of the two spring tongues 21, 22, so that the metal housing 2/2 in its longitudinal direction relative to the spring tongues 21, 22 at least minimal move, or can expand.

When the spring tongues 21 and 22 in the in the Fig. 8 and 12 to 14 shown manner are engaged with the metal housing 2/2, then the metal housing 2/2 is securely held on the mounting part 12/1. However, the often pulse-like volume expansions of the metal housing 2/2 can not be so transferred to the foot plates 14 and 15 of the mounting part 12/1 and affect that used screws or rivets with which these foot plates 14 and 15 are fixed to, for example, a mounting surface 11 , can be damaged or loosened in the short or long term.

In the embodiment of the Fig. 17 to 20 are the opposing second lowest ribs 41 'and 42' of the metal housing 2/1 each provided with two downwardly against the engaging ribs 37 and 38 projecting stop fingers 55 and 56. In this case, their distance b2 is selected so that the engagement profiles 24, 25 of the two spring tongues 21, 22 of the assembly part 12/1 used here also have sufficient clearance therebetween and the metal housing 2/1 has the possibility of unimpeded changes in its operating volume perform. This means that b2 is larger than b1.

In the Fig. 21, 22nd an embodiment is shown in which a load resistor 1/1 is fixed with a metal housing 2/1 with smooth outer surfaces by means of two mounting parts 12/1 on a mounting plate 20. To the two engagement profiles 24, 25 of the two spring tongues 21, 22 in the basis of Fig. 8 to 10 or the FIGS. 14 to 20 be recorded manner, the two side walls 61 and 62 are provided with opposite rectangular recesses 43 '. Again, the width b2 of the recesses 43 'chosen slightly larger than the width b1 of the spring tongues 21, 22 for the reasons mentioned above. It can be seen that in this case the bottom 64 is a closed wall.

Similar to the use of in Fig. 1a, 1b shown mounting parts 12 and 13, the metal housing can be 2/1 and 2/2 in a simple manner and thus cost-saving with the spring tongues 21, 22 of the mounting parts 12/1 into engagement and possibly also solve again. It is only necessary in each case to push the lower part of the metal housing 2/1 or 2/2 from above (drawing-related) between the spring tongues 21, 22 until their engagement profiles 24, 25 engage in the respective counter-profiles.

It is understood that the engagement profiles 24, 25 need not necessarily have the V-shape chosen here, for example, in order to achieve the desired advantages. Also conceivable are other profile shapes, for example sawtooth-like hook shapes or the like.

In all embodiments, in each case at least two mounting parts 12, 13 and 12/1 are used, always making sure that your center distances a1 in the longitudinal direction of the respective metal housing 2, 2/1 or 2/2 are chosen so that the operational volume changes of the metal housing 2, 2/1, 2/2 can be done without the respectively with the profile structures or with the counter profiles of the metal housing 2, 2/1, 2/2 engaged spring tongues 21, 22 harmful displacement forces can be suspended.

While in the drawn mounting parts 12, 12/1, 13, 13/1, the opposing connecting elements 21, 22 are each formed in mirror image the same, also offset from each other arranged connecting elements, ie spring tongues 21, 22 may be provided. Especially, when the spring tongues 21, 22, integrally cut out of the bottom plate 27 and bent out. Thus, an embodiment would be conceivable in which only one spring tongue is arranged on the one side and on the opposite side two spring tongues are provided, wherein the one spring tongue faces a gap between the other two spring tongues.

Claims (14)

Device for fastening a load resistance (1) provided with a metal housing by means of screws (48), rivet elements or similar fastening means to a mounting surface (11),
marked by
a mounting part (12, 12/1, 13, 13/1) which produces the connection to the mounting surface (11) and which has at least one connecting element (21, 22) with at least one engagement profile (24, 25), which positively and / or non-positively and resiliently engages at least partially in at least one counter-profile formed receiving profile (7, 8, 43, 43 ') at least one outer side of the metal housing (2, 2/1, 2/2). Apparatus according to claim 1, characterized in that the mounting part (12, 12/1, 13, 13/1), at least two mutually resilient fasteners (21, 22) with engagement profiles (24, 25). Apparatus according to claim 1 or 2, characterized in that the metal housing (2/2) on the outside rib-like and / or groove-like structural elements (40) into which the engagement profiles (24, 25) of the connecting elements (21, 22) engage positively and / or non-positively. Device according to claim 1 or one of claims 2 to 3, characterized in that two mutually opposite side walls / 61, 62) of the metal housing (2/2) have cutouts (43) each with two mutually facing boundary surfaces (44, 45). are provided, which receive the engagement profiles (24, 25) of the connecting elements (21, 22) at least partially and with play between them. Device according to claim 1 or one of claims 2 to 4, characterized in that the connecting elements (21, 22) of the mounting part (12, 13, 12/1, 13/1) of at least two symmetrical to a median plane (23, 23 ') directly or mutually offset from each other opposite resilient tongues (21, 22), the engagement profiles (24, 25) are adapted to form a positive and / or non-positive elastic retaining engagement with the receiving them counter profiles of the metal housing. Apparatus according to claim 5, characterized in that two mutually opposite spring tongues (21, 22) are integrally bent on a substantially perpendicular thereto extending bottom plate (27). Apparatus according to claim 6, characterized in that the bottom plate (27) on the upper side on a support bracket-like mounting part (12/1) is attached. Apparatus according to claim 1 or 7, characterized in that the mounting part (12/1) consists of a minimum minimum spring properties having metal sheet from which the connecting elements (21, 22) are cut out and shaped as spring tongues. Apparatus according to claim 1 or one of claims 6 to 8, characterized in that the mounting part (12, 12/1, 13, 13/1) is integrally formed from a metal sheet and between two lateral, lying in a common mounting plane foot plates (14 , 15) has a plane offset from the mounting plane on two support walls (16, 17) has a support plate (18) on which the connecting elements (21, 22) are arranged. Apparatus according to claim 10, characterized in that the support plate (18) at the between the support walls (16, 17) extending longitudinal edges with against the mounting plane of the Fußlaschen (14, 15) folded stiffening tabs (26, 27) is provided. Apparatus according to claim 1 or 8, characterized in that the metal housing (2, 2/1) for positively and / or non-positively resilient receiving the connecting elements (21, 22) of a mounting part (12, 13) in a housing wall (61, 62nd ) or a housing bottom (64) has at least one recess (7, 8) with two parallel marginal edges (9, 10) which are resiliently engaged with the engagement profiles (24, 25) of the connecting elements (21, 22) (spring tongues) are bringable. Device according to claim 1 or one of claims 6 to 11, characterized in that the connecting elements (21, 22) designed as spring tongues are connected to each other individually or together by a bottom plate (27) on the carrier plate (18) of the mounting part (12/22). 1) are attached. Apparatus according to claim 12, characterized in that the two spring tongues (21, 22) interconnecting bottom plate (27) is provided with three side cut and clamping springs (28) bent fastening elements, which correspondingly shaped openings (30) of the support plate (18). piercing the support plate (18) grip under clamping. Apparatus according to claim 13, characterized in that the bottom plate (27) with a in an opening (30 ') of the support plate (18) lockingly engaging locking tongue (39) is provided.

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