DE1874565U - ELECTRICAL RESISTOR EMBEDDED IN AN ENCLOSURE. - Google Patents

Description

Patontanwälto

Beetz u.UnprecM PA 2? 9 1 9 V * 26A 63

Olplom-.lnc rl aura
Munich 22, Sieinsctorfstrafje 10

234-8550Ö April 26, 1963

Rheinisch-Westfälische Isolatoren-Werke G-.m.b.H., Siegburg

Electrical "resistance" embedded in a housing

The fire concerns an electrical resistance, .- " which is embedded in an insulating material housing, which is attached to a plate-shaped carrier to be protected from strong heat, in particular on a circuit board provided with printed or etched conductor tracks.

It is known to use electrical resistances, in particular Wire resistors to be embedded in the insulating housing (for example made of plastic or ceramic) for the purpose of insulation. The mechanical mounting of these resistors on the plate-shaped support usually takes place, at least to that extent it is a question of smaller resistor types, due to the electrical connection wires of the resistor.

In order to achieve a reliable mechanical fixing of the resistance on the plate-shaped carrier, the insulating housing must be supported on this carrier. In the known designs, for this purpose it is regularly _: · With its entire broad side on the plate-shaped carrier. '■■'

234-x931b-TR (7)

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However, such an arrangement then leads to difficulties.

.things when the plate-shaped carrier has to be valued against strong heat, as is the case, for example, with S cha It ung plates of the Pall, which are provided with printed or etched conduction paths ..>. ■: "". ^iv

One could in itself have the idea that heat dissipation ^l on the Yfiderstand; to restrict the plate-shaped carrier by providing further insulation between the housing of the resistor and / the plate-shaped carrier

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will. Such an embodiment has eil However, not only, _Λ power, that it requires additional components are required, and * "so that the assembly difficult} -ungünstig is also 'that when using laser insulating spacers mechanical support of, resistivity alone by means of its `` -ι electrical connection wires, 6 is hardly possible <,

The innovation is therefore based on the task of

avoidance of these deficiencies an electrical resistance of the single f to train initially mentioned type so that on manufacturing and mon-r-i

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day technically simple way - a larger heat dissipation from the> ' Resistance to the plate-shaped carrier is avoided.

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This object is achieved, according to-the furnace by ⁱⁱⁱ that the housing comparable with integrally formed projections, * -. _y can be seen, over which there is a small area on the plate- »

shaped carrier supports. \ f. <; ■ ^ 'ΐ

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Since the housing of the resistor in the case of the _i · <

Execution is in contact with ... the. Plate-shaped 'support only over a small area. most of the heat is _{radiated in.:} the area around the resistor; - |

The use of one-piece with the housing of the Vfiderstaa des * formed approaches has the further advantage that the number , -z of the required components. Reduced and the assembly * - '

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is facilitated "In particular, it is auch'beifder neuerungs- solution ι * proper readily possible, the resistance solely by means of its electrical connection ^wires: to the plate-" mechanically fix [-1-shaped carrier -p $: -. '"-' . "\> ⁱ

Provided that there is an additional me cha- 'in the case of greater resistance. African holder, is desirable for this purpose are zahlreichei- ·> possibilities are available, but with a small 'area _f ** 2 ^ä contact between the zusät.zlichen'iHalterungsele-''■ * · * elements on the one hand and respectively the resistor »Doaj;, plate-shaped _v * J carrier on the other hand, pay attention. Is, -UK". V - ■ % ν

In an advantageous ^{embodiment "i} der _i} .l | e! Ue _: '^ ν--., The support approaches ^ ej ^ u ^ h.-dem. Pl ^ tenf ₄ iix ^ @ ^^^ äg, e _; ^^ _s ^^ _ti ^. facing webs of the housing. - ,, -. J ^ -'- ^: '''' - ν ^r ': ^; ■: ■■'.>"■ · -"'- ■ <* i / l «

According to a different embodiment, dome-shaped projections of the housing 'represent the support lugs. · ..- "■'. ' V "... '■"..;.' - i

In order to adjust the Yäderstand both standing and ai ch to be able to arrange lying "on the plate-shaped carrier, for. Both cases, however, only have a single housing design need are, according to a further expedient embodiment of the furnace, both on a long side and on a broad side of the housing support lugs provided.

In the case of a resistor with a housing that only attaches to one Side carries support lugs and on a side offset by 90 ° with respect to this side, a recess for inserting the It has resistance Vs ^ according to a further development the innovation proved to be advantageous if the recess covered by a molded piece i ^ tj that on its outside also carries support approaches.

In this way, such a resistance can also be The interior of the housing is accessible at any time by removing the fitting, standing or lying on the plate-shaped Arrange carrier.

These and other details of the innovation are running out the following description of some exemplary embodiments illustrated in the drawing. Show it:

. ■ / ÜPigt 1 is a section through a-renewal proper ^resistance; According to a first exemplary embodiment, it stood

FIG. 2 shows a section along the line ΙΪ-ΙΓ of FIG. 1;

3 shows a section through a further exemplary embodiment of innovation}. '■

Mg. 4 is a side view of the resistor according to Jig. 3;

I ¹ Ig. 5 and 6 section and side view of a resistor

■ -, · '-. according to a third exemplary embodiment of the

Innovation!

7, 8 and 9 side view, end view and top view of a molded piece for use in one renewal resistance.

The resistor T shown in Figures 1 and 2 is in an insulating housing 2 is embedded, which extends over lugs 3 provided on an ijiit printed or etched conductor tracks Schaltungsji ^ oldte 4 supports.

De? * Resistance 1 is .from above / in the recess 5 of the

Housing 2 freely insertable, this recess 5 is subsequently closed in a suitable manner (for example by cementing). The connecting wires 6,7 of the resistor 1 are through openings of the housing 2 and are used for electrical connection of the resistor 1 with the one provided on the plate 4 Circuit and preferably at the same time for mechanical mounting of the resistor on the plate 4.

^ The support lugs 3 are present in the exemplary embodiment 1 and 2 formed by webs of the housing 2 according to FIGS. they are supported by only a small area on the circuit board '4 and transmit, therefore in the operation of the resistor only a small part of the amount of heat generated in the resistor on the circuit board 4Γ by far the largest part of the amount of heat is emitted into the environment.

In the embodiment according to the Pig. 3 and 4 are the support lugs 5, which are also formed by webs of the housing 2, are provided on a narrow side of the housing; the: Resistor 1 is therefore placed upright on circuit board 4? The connecting wires 6 and 7 are in this embodiment led out on opposite sides of the housing 2. Here, too, the open side of the housing 2 can be closed in a suitable manner.

In the embodiment according to FIGS. 5 and β are the Support approach; e 3 dome-shaped, from which a almost punctiform support of the housing 2 on the circuit board 4 results. In this exemplary embodiment, the lugs 3 are provided on the end face of the housing 2; the Resistance is therefore placed upright on the circuit board '"

In "the Pig. 7, 8 and 9, there is finally a fitting illustrates that to cover the in the insulating housing opening provided for inserting the resistor 1, 5 is usable. For this purpose, the fitting 8 is on his one side is provided with a centering shoulder 8a, which is positively locked fits into the opening 5.

On,; its other side, the fitting has 8 lugs 3 ' over which the resistor housing is attached to the circuit board 4 can support. This Yfeise is with "use 'A housing "which has lugs 3 on its narrow side

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(According to FIGS. 3 / to 6),: optionally, in addition to the standing arrangement, a lying arrangement is also possible, with the projections 3 ¹ forming the spacer elements. i

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^ The fitting 8 still contains openings; 8b, that for leading out the connecting wires 6,7 of the? ß.derstandes to serve.'

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Claims (6)

■ rf% protection claims 1. Electrical resistor, which is embedded in an insulating material housing, which is attached to a plate-shaped carrier that is to be protected against strong heat, in particular to a circuit board provided with printed or etched conductor tracks, "$ st, dadur <3'i | vgeke η η z> ei oh n ""'■ £ ■ "-1" - _that:;. dasfi housing (2) with integrally formed projections (3) versehpjföiis ^ t,..', about which there is a small area at the -plattenförpiigen'f ^ äger (4) is supported. 2. Resistor according to claim 1, characterized in that the Stützanöätze '(3) are formed by the plate-shaped support (4) facing -. Webs of the housing (.2. /). 3. Resistor according to claim 1, characterized in that the support lugs, e (3) are formed by dome-shaped projections of the housing (2). ^: "'" U "... ·' _-. ■■ 4. Resistance according to claim; , 'Da ^ ß both' on one longitudinal side and on a broad side * of the housing (2) supporting extensions 1, characterized in that? ₍₃₎ are provided. 5. Resistor according to claim "1 with a housing that is only at one side supporting lugs; carries and on one opposite this Side offset by 90 ° a recess for insertion of the resistance • recess (5) through a. Form piece (S) is covered, the -j its:; £ outside also bears support lugs (3 ^f ). . ■ 6. Resistor according to claim 5, characterized in that the '' 'shaped piece (8) on its inside into the recess (5). engaging centering shoulder (8a) carries. ■ · '■ . ">., ■■ '■■ / ■ '.> ■; ■■■ .: ■ · ' γΛΑ, · >. · - ', / ■ •• ■ ί "·;'