DD142637A1 - ELECTRICAL COMPONENT WITH CONNECTING WIRES FOR INSERTING IN DRILLING CIRCUITS - Google Patents

Description

Berlin, do 26.6.1979 55 033/13

Electrical component with connecting wires for insertion in holes in a circuit board.

Field of application of the invention

The present invention relates to an electrical component with connecting wires for insertion into holes in a circuit board, wherein the connecting wires have a bead for limiting the insertion depth, in particular ceramic capacitor o

Characteristic of the known technical solutions

Such devices with a torus are z »B, known from DE-OS 23 46 340. In this bead, the lower side is formed as a result of the nature of the preparation by immersion in a tin bath and targeted cooling and solidification of the adhering tin in the form of a circumferential groove

From DE-GM 77 09 932 it is also known to form the bottom of the bead in the form of a cone and to provide the Tauchumhüllung to the top of the bead «

Furthermore, it is known from US-PS 36 04 836, Ringwuiste made of solder · to attach to the leads *

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These are intended to limit the insertion depth into a printed circuit board once and to form a second limitation of Tauchumhüllung and cause as thick a cladding layer between two adjacent leads.

In these embodiments, due to the conical shape of the underside of the bead when inserting the leads into a hole of a printed circuit board, the bore is sealed from above as by a conical valve disc,

As a result, during the subsequent soldering process, in particular during dip soldering, the resulting gases and residues of the soldering aids can not escape upwards. The result may be cold solder joints, as the gases form a cushion can prevent das.die supply of solder between connecting wire and track ₀ particularly critical this is in the formation of US-PS 36 04 836, because there the solder to melt "The hole is completely closed from above.

Object of the invention. , , ,

The aim of the invention is to avoid the aforementioned disadvantages of the prior art ₀

Dar .l-egiuig the essence of the invention

The invention is based on the object to provide an electrical component with leads for insertion into holes in a circuit board, in which a perfect soldering can be achieved in the arrangement of a bead on the connecting wire v / ground *

According to the invention this is achieved in that the Schal-

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formed on the underside of the Ringvmlstes unsymmetrical and / or uneven and / or at least one depression or flattening and / or increase _a ufweist.

As a result, the lower edge is not completely on the circuit board, but it is always created at least one slot or gap, so that during the soldering process resulting gases and soldering agents can escape upwards. As a result, the solder can penetrate from below into the bore, so that a secure soldering of the connecting wire is ensured with the conductor tracks, especially in plated-through holes.

The underside forms a circumferential groove or a cone whose or whose axis of symmetry or the axis of symmetry of the annular bead is parallel to the axis of the connecting wire ₀ The axis of symmetry forms an acute angle to the axis of the lead wire, At least two in R _a stermaß the holes of a circuit board provided connecting wires of a component are similar to the undersides of the annular beads are not arranged in the same direction, but against each other twisted. The twisting is about 180 ° _o On opposite sides is provided in each case a straight or curved, in particular concave flattening, which together include a blunt to acute angle, the underside is wavy formed by a plurality of the same at the U _m beginning thereof distributed notches. The indentations or flats continue • into part of the lead wire * any part of the lead wire that remains in the hole area when plugged in may have additional indentations or flats or a slot or shear

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provided, the ribs form whose largest radius corresponds at least approximately to the diameter of the bore.

The indentations or flats in the connection plate are arranged and formed such that they form ribs which are located at least for the most part within the bore when the connecting wire end is inserted into the bore. The outer edges are shaped such that the connecting wire can be clamped in the bore by frictional engagement The outer edges of the ribs of the underside form an acute vein with the axis of the connecting wire. The outer edges of the ribs are curved outwards in the area of the bore, and the largest circumference corresponds approximately to the diameter of the bore greater than the diameter of the bore o For more than two unilaterally led out connecting wires at least two are provided with an annular bead and flattenings and / or indentations on the underside of the same «The increase (s) is or are provided in the form of warts and / or webs, formed by at least one burr and centrally or eccentrically provided around the connecting wire, the line-shaped (η) collect (s) is or "are inside out Gradient arranged the elevation (s) are respectively ₀ formed by a Pressgrat" The or Pressgrat (s) is or The elevations extend into the region of the adjoining connecting wire end and serve for better holding, in particular for centering and / or for Pestklemmen in the bore "The increases lie-on a radius vector whose direction is transverse, in particular perpendicular to the longitudinal extent of the component ₀ For components with more than two side-facing or bendable connection elements

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Wirhten at least two are provided with a torus with the increases. The remaining connecting wires have at least one annular bead "All annular beads are at least approximately on a straight line,

The component is provided with a Tauchumhüllung »The Tauchufiihüllung reaches at the most to the annular bead. The annular bead forms the boundary for the Tauchumhüllungsmasse during the immersion process of the device in a corresponding immersion bath, the annular bead and the shapes are produced by upsetting and appropriate deformation of the lead wire * The annular bead and the deformations are performed in a single operation,

Ausführ'ungsbeispiel

The invention will be described in more detail with reference to the embodiments illustrated in the drawings. Show:

Pigc 1: shows a bead according to the invention, whose center line runs parallel to the axis of the connecting wire, from the side;

Pig * 2: a bead whose underside has a cone whose axis of symmetry has an acute angle to the axis of the connecting wire and

.Pig. 3: an electrical component with connecting wires according to the invention, the

Pigo 4 to 6: show an embodiment of two sides and from below with two flats,

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Fig _e .7 ¹ UiId £ 5: an embodiment with a plurality of indentations on the underside of the annular bead from the side or, from below,

Fig. 9 »10 and 11; a version with squared wire from two sides or in section;

FIG. 12 shows a connecting wire with notches on the edge of the annular bead, which extend into a part of the connecting wire; FIG.

Fig. 13 and 14: a section along the line A-B and, respectively, C-D of Fig. 12;

Fig. 15: an example similar to Fig. 12 with such

Notches in the wire part that jamming within the bore is achievable;

Fig. 16, 18 and 20: each one possibility of changing the cross section of the wire in the area of the bore

with plugged in component and the

Fig. 17, 19 and 21: the corresponding cross-sections corresponding to Figs. 16, 18 and 20;

Fig. 22, 2 #, 26 and 29: each show a side view of an embodiment according to the invention provided with an annular bead connection wire j plugged into a bore of a printed circuit board, and the

Pig "23, 25, 27, 28 and 30: each of FIGS _e 22, 24 'and 29 corresponding to respective view of the connecting wire from below'

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In Pig. 1 is denoted by 1 a lead wire of an electrical component or component, not shown, whose lower end 2 is used for insertion into a bore 3 of a circuit board 4. At the lead wire 1 a Ringv / ulst 5 is formed, in particular upset, the underside 6 is formed in the form of a circumferential groove 7. According to the invention, the bottom 6 is formed asymmetrically and uneven that the annular bead 5 is arranged offset with the groove so that whose center line or axis of symmetry 8 eccentric, parallel to the axis 9 of the lead wire 1 runs "This is the groove 7 on the side after which it is moved in parallel, radially further projecting from the axis 9 and down longer than on the other side ₀ This causes the central insertion of the lead wire 1 in the bore 3 * that the groove 7 at the point with the larger radius of the axis 9 seen from the upper edge 10 of the bore 3 abuts and thereby the groove 7 in places with smaller Radius leaves a gap T1 between these locations and the upper edge 10. Through this gap 11 can during soldering n emerging gases and vapors escape, so that the solder from the bottom can easily rise into the hole 3, if, as shown in the embodiments, the conductor tracks 12 are metallized, »

In the embodiment of FIG. 2 is the annular bead 5 centric to the lead wire 1, however, the bottom 6 z »B« is formed by a cone 13 whose axis of symmetry 8 forms an acute angle to the axis 9 of the lead wire 1. Instead of the cone 13, a groove 7 can also be provided here. In addition, could still be the cone 13 or the

-8th-

~ 8 "Berlin, _e 06/26/1979

Its groove 7, if appropriate, displaced parallel with the annular bead 5, as in the example of Figure 1 · _0. ·.

By this inclination of the symmetry axis 8 is achieved that the cone 13 at each point of the circumference of a different length and the cone sheath has a different angle to the axis 9 β This causes the centric or eccentric insertion of Anschlußdralitendes 2 in the bore 3, a gap 11 for Escape of gases and vapors during the soldering process »

Pigc 3 shows an electrical component 14 ", for example, a ceramic disk capacitor with two connecting wires 1 according to the invention. The two connecting wires 1 have a distance ₉ of the pitch for printed circuits, or a multiple thereof, corresponds to ₀ Advantageously, the lower sides 6 are indeed formed similar, but arranged rotated against each other-? Preferably, they are rotated by 180 ° against each other attached »This will certainly at both leads 1, a gap 11 between the bottom 6 of the annular bead 5 and the top 10 of the holes 3 generated and thus always a perfect soldering achieved»

According to an advantageous embodiment of the annular bead 5 is provided in each case just below the lower edge 15 of the device and it is used when diving the device 14 in a dip to achieve a wrapper 16 to clearly limit the envelope along the connecting wires 1 "This will be the otherwise in diving limits the leads 1 paint pants 17 limited to a defined length and also prevents the. Paint pants 17 in the hole 3 rich and prevent good soldering.

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The invention is applicable to all devices having electric wire terminals inserted into printed circuits v / ground can, so as Z ₀ for resistors, diodes, (transistors, thick and thin film modules, potentiometers, hot and cold conductors etc _o

4 to 6 according to the invention, the bottom 6 of the annular bead 5 by two opposite oblique flats 18 down V-shaped, so that two support edges 19 are formed, which when inserted into the bore 3 on the upper edge 10 of the bore. 3 aufliegen «This creates between the remaining surface areas of the bottom 6 and the upper edge 10, a gap 11 through which the at. As a result, the solder from below easily wet the lower end 2 of the lead wire 1 and go well with through holes 3 in this up to the surface of the circuit board 4 rising soldering process resulting gases and vapors. This ensures a perfect solder joint.

The pig. 7 shows an embodiment in which the bottom 6 of the annular bead 5 with a plurality of the U _m fang distributed notches 20 provided "Thereby, the bottom 6 is wave-shaped and is provided with a plurality of support edges 19, so that between two respective resting edges 19, a gap 11 is formed when the 'component with the terminal wire end 2 is inserted into the hole 3.

The distribution of the notches 20 and the support edges 19 is illustrated in FIG ₀ 8, showing the lead wire 1 of Fig. 7 from below ₀

In an advantageous embodiment of the invention, the

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Achflachungen 18 and / or notches 20 bis .in the subsequent terminal wire end 2 extend, which on the one hand reaches a better supply of solder into the bore 3 and with appropriate broadening of certain areas of the cross section of the connecting wire end 2 a tight fit caused by ReibungsSchluß in the bore 3 v / ground ₀ Such embodiments of the invention, Figs. 9 to 21 show.

Pig, 9 shows in section an electrical component 14, a ceramic disc of a ceramic capacitor or a substrate of a thick-film or thin-film circuit with the corresponding applied resistors and / or capacitors and / or inductors. This is in accordance with the invention provided with a connecting wire 1, which has a annular bead 5 in the propriety of the lower edge 15, which advantageously serves to limit a Tauchumhüllung 16 along the connecting wire 1 at the same time. As a result, the "length of the so-called paint pants 17 arising during immersion enveloping is clearly limited and they can no longer extend into the bore 3, where they can lead to cold solder joints.

The two opposite flattenings provided here are concave and have been formed by squeezing. The pinch seal is so mounted that, as Pig. "9, transversely so far widened to the squeezing direction of the cross section of the lead wire 1, that lateral ribs 21 are formed whose K remain _a nth 22 within the bore 3 and a unique fixation and with a corresponding broadening on the or a slightly larger diameter of the bore 3 a clamping in this is possible, as the Pig. 9

-11 ·

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shows. In this case, the widened lower edge 6 of the annular bead 5 adjoins the upper edge 10 of the bore 3,.

FIG. 10 shows the component 14 according to FIG. 9 from the front, wherein the formation of the column 11 is clearly visible. In FIG. 11 the cross section of the connecting wire end 2 is shown in the position of the strongest pinch.

Fig. 12 shows an embodiment with four mutually perpendicular notches 20 extending from the lower edge 6 over a part of the lower end 2 of AnSchlußdrahtes 1 and the end with inserted lead wire 1 within the bore 3 or beyond this can reach. This also creates ribs 21, the edges 22 are located directly below the annular bead 5 on a circumference which is greater than the diameter of the bore 3. As a result, the insertion depth is limited. The angle of the edges 22 is in this area to the axis 9 of the bore 3 expedient so pointed that a clamping can be achieved by frictional closure when inserting, Again, the upper edge of Ringvmlstes 5 serves to limit the Tauchumhüllung 16 or _{0 of} the so-called " Lackhosen "17 · 23 denotes a capacitor pad or a resistive layer or the like.

FIGS. 13 and 14 show the section AB or, CD of FIG. 12 _e

In FIG. 15, the notches 20 are made as in the example according to FIG. 12, but the pinchings are made in such a way that the outer edges 22 of the ribs 21 are arched outwards in such a way that they center and

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'If fixation in the hole 3' effect, as the ribs 21 in the embodiment according to Pig, 9 to 11 ₀ Again, the insertion depth is limited and remain between the ribs 21 in the region of the upper edge 10 each have a gap or opening, the Connecting wire 1 is plugged here into a connection cap 24, which is pushed on a runden, B ₀ round or tubular capacitor or resistance carrier 25 and contacts it,

.Figo. 16 shows a connecting wire, which is split below the annular bead 5 through a slot 26 in the inserted state in the region of the bore 3 and the two legs 27 causes a centering and fixing in the bore 3. »This embodiment according to the invention, as well as in the Pig "18 and 20 shown and described below Beisp-iele, regardless of anv / endbar whether the bottom 6 is inventively flattened or provided with notches and / or the Tauchumhüllung 16 extends to the annular bead 5, the latter thus limits the length of the Lackhosen 17 ,

17 shows a section through the widest point of the slot 26 of FIG. 16 _#

In Fig, 18 and 19, a lead wire 1 is similar to the Fig * and 17 shown instead of the slot 26, however, a notch 28 is provided here »

Finally, FIGS. 20 and 21 show a possibility of cross-sectional broadening by shearing 29 of the connecting wire 1 ».

In Figo 22, the A _{n is} final wire 1 of the electrical component 14 with its end 2 in a bore 3 of the printed

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Circuit board 4 is inserted and connected by soldering to the conductor 12 "when using durchkupkupferter bores with the inner lining 30 and optionally the arrangement of upper contact zones (soldering) or conductive coverings 31 also a perfect soldering of the same with the terminal wire end 2 allows»

Above the bore 3 of the lead wire 1 is provided with a annular bead * 5 , the invention according to the invention on the bottom 6 elevations 32, in this case in the form of warts, which are arranged so that they at least partially on the top 10 and Contact zone 31 of the printed circuit board 4 rest. This ensures that when plugging in the component 14 or whose lead wire 1 in the printed circuit board 4 between the bottom 6 of the annular bead 5 and the top 10 and the K _o ntaktzone 31, a gap 11 is formed _c This allows that resulting from soldering Gases or the flux itself can escape upwards and therefore the solder can easily wet the conductor 12 or pull up to K _o ntaktzone 31. As a result, perfect soldering is achieved with single-sided as well as double-sided printed circuit boards, since Z ₀ B. bubble formations that occur when the flux vapors must escape downwards can no longer occur,

In itself, it is already sufficient if a single increase 32 is provided at the bottom 6 * However, since the drilling rings 3 sometimes too large and / or they are not exactly centric to the inserted lead wire 1, it may happen that the desired effect does not happen completely occurs ο Preferably, therefore, a plurality of elevations 32 are provided on ü _m catch the bottom 6 distributed. This is

-14-

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ensures that always the desired gap 11 is formed. In the embodiment, therefore, as Figo, 23, three warts 32 are arranged offset by 120 °, which lie on one to the lead wire 1 and whose E _n de 2 concentric circle.

A further advantageous embodiment shows DIE 'FIG _e 24 "Here, there are the ridges of the line-shaped radial webs 33' guarantee when inserted into the bore 3 of the gap 11, Here, a single web 33 would be sufficient ,, Figure 25 shows the Version with three bars 120 offset by 120 ° from below.

In addition to the limitation of the insertion depth of the component 14 and the achievement of the gap 11 through the elevations can, as shown with reference to FIG. 24, the rib bead 5 still serve that when immersing the component in a coating mass 16 of the annular bead 5 as Limitation for the rise of the envelope mass 16 on the lead wire 1 acts. Thereby, the known disadvantages, the z, B _o arise when the coating as so-called "L _a ckhose" extends into the bore 3 avoided, the annular bead 5 can therefore be ngeordnet very close to the lower edge 15 of the component 14 _a.

A further possibility of arrangement and position of the peaks in the form of bars 33 is shown in Figures 26 _e and 28th There, the webs 33 are arranged on a circle in the circumferential direction as shown in FIG. 27 and are adapted, for example, the circular shape, whereas the Fig, 28 show webs 33 which are mounted running from the inside to the outside,

The elevations 32, 33 are preferably formed at the same time in the manufacture of the annular bead 5, z, B, in compression

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and / or pressing process,

In a further advantageous embodiment of the invention, the elevations in the manufacture of the annular bead 5 can be formed by the fact that the multi-part pressing or upsetting tool forms a press ridge 34 of suitable shape, as for example with reference to the Pig «29 from the side and in Fig ₀ 30 of shown below. Here is't z, B _{0 has been used} a two-part mold, the Preßnaht at least on the bottom 6 of the annular bead 5 two opposite Preßgrate 34 arise that guarantee the emergence of the gap 11 when inserting the lead wire 1, as they are on the top 10th or, the contact zone 31 can rest. The burrs 34 may advantageously extend slightly downwards, so that a certain centering of the connecting wire end 2 is achieved in the bore 3, In addition, they can serve in accordance with protruding width for clamping attachment, as indicated by the dashed line 35 in Fig. 29 is.

Suitably, the opposite pressing ridges 34 are arranged transversely, in particular approximately perpendicular to the longitudinal extent of the component 14, in order to avoid tilting thereof in the bore 3 as far as possible.

In electrical components 14 with more than two leads 1, Z ₀ B, module units, at least two connecting wires 1 are provided with an annular bead 5 according to the invention, If such components are provided with a Tauchumhüllung 1-6, then all, or at least two connecting wires 1, with an annular bead 5 according to the invention or, the rest provided with a simple annular bead 5,

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to prevent "lacquer pants forming during the dive, which would protrude into the hole 3 and thus could degrade the solder connection, the Ringvmlste 5 are then all at a height"

-17-

Claims (1)

- 17 - Berlin, d.26.β ο 1979 2 M 719 - 55 033/13 Inven sans pruch 1, electrical component with connecting wires for insertion into holes in a circuit board, wherein the connecting wires have a bead for limiting the insertion depth, in particular ceramic capacitor, characterized in that the Schaltungspla-bte (4) facing bottom (6) of the annular bead (5) asymmetrically and / or is uneven and / or "has at least one depression (20) or flattening (18) and / or elevation (32; 33; 34)" 2e component according to item 1, characterized in that the underside (6) forms a circumferential groove (7) or a cone (13) whose or the symmetry axis (8) or the axis of symmetry of the annular bead (5) eccentrically parallel to the axis ( 9) of the connecting wire (1). 3 * component according to item 1 or 2, characterized in that the symmetry axis (8) to the axis (9) of the connecting wire (1) forms an acute angle » Component according to one of the items 1 to 3 », characterized in that at at least two connecting wires (1) of a component (14) provided in the grid dimension of the bores (3) of a circuit board (4) the subsections (6) of the same kind are provided Annular beads (5) are not arranged in the same direction, but are arranged rotated against each other, 5ο device according to item 4, characterized in that the rotation is about 180 °. -18- - 18 - Berlin, a * 26.6ο 1979 1719 ⁵⁵ 033/13 G ₀ 'component according to point 1, characterized by »that on opposite sides depending on a straight or curved, · in particular concave flattening" (18) is provided, which together include an obtuse to acute angle ₀ 7 »component according to item 1, characterized in that the. Bottom (6) by a plurality of circumferentially distributed the same applied notches (20) is wave-shaped " Component according to one of the points 1,6 or 7, characterized in that the notches (20) or flats (18) into a part of the connecting wire (1) continue "^'s 9 * component, in particular according to one of the items 1 to 8, characterized in that in a part of the connecting wire (1), which remains in the region of the bore (3) when inserted, optionally additional notches (20) or flats (13) or a slot (26) or a shearing (29) are provided, the ribs (21) form whose largest radius at least approximately corresponds to the diameter of the bore (3), Component according to item 8 or 9? characterized in that the notches (20) or flats (18) in the lead wire (1) are arranged and formed so that they form ribs (21), in at the hole (3) inserted terminal wire end (2), at least for largest part within the bore (3) located _a β component according to item 10, characterized by; that the - 19 - Berlin, d.26.6.1979 211-719 · 55 033/13 Outside edges (22) are shaped such that the connecting wire (1) in the bore (3) can be clamped by frictional engagement ο 12. The component according to one of the points 1 to 11, characterized in that the outer edges (22) of the ribs (21) of the underside (6) with the axis (9) of the connecting wire (1) form an acute angle _e 13c component according to one of the points 1 to 12, characterized in that the outer edges (22) of the ribs (21) in the region of the bore (3) are arched to axißen and corresponds to the largest radius at least approximately the diameter of the bore (3), 14o Component according to item 13 »characterized in that the largest circumference is slightly larger than the diameter of the bore (3)« 15 »component according to one of the points 1 to 14» characterized in that at more than two unilaterally led out lead wires (1) at least two with an annular bead (5) and flats (18) and / or notches (20) on the bottom (6 ) are provided. 16 »component according to one of the items 1 to 15, characterized in that the elevation (s) (32; 33) are provided in the form of warts (32) and / or webs (33), 17o device according to item 16, characterized in that the elevation (s) is formed by at least one ridge (34), or are ο, -20- 20 - Berlin, d.26.6.1979 55 033/13 18, component according to item 16 or 17 _S, characterized in that the elevation (s) (32; 33; .34) is provided centrically or eccentrically around the connecting wire (1), or ₀ » 19 »component according to one of the points 16 to 18, characterized in that the linear elevation (s) (33; 34) are arranged running from the inside to the outside« 20 * component according to one of the points 16 to 19, characterized in that the elevation (s) are formed by a burr (34), 21 «component according to item 20, characterized in that the one or more Preßgrat (s) (34) by the separation point (s) of the bead-generating multi-part tool is formed, or«, are 22 «component according to one of the points 10 to 21, characterized in that the elevations (32; 33; 34) extend into the region of the adjacent connecting wire end (2) and for better support, in particular for centering and / or for Pestklemmen in the hole (3) o 23 * component according to one of the points 10 to 22, characterized 'in that the elevations (32) lie on a radius vector whose direction is transverse, in particular perpendicular to the longitudinal extent of the component (14)' is » 24 »component according to one of the points 1 to 23», characterized in that for components (14) with more than two directed to one side or bendable leads (1) at least two with a Ringvmlst (5) with -21- Berlin, do 26.6.1979
7 l9. 55 033/13 the elevations (32; 33; 34) are provided, 25 »component according to item 24», characterized in that the remaining connecting wires (1) have at least one annular bead (5) and that all annular beads (5) lie at least approximately on a straight line «' 26, component according to one of the items 1 to 25 », characterized in that the component (14) is provided with a dip sheath (16), 27o Device according to one of the items 1 to 26, characterized in that the immersion sheath (16) at most, until
Ring bulge (5) is sufficient, - 28ο device according to item 27, characterized in that the annular bead (5) the limit for the Tauchumhüllungsmasse (16) "during the immersion process of the component (14) formed in a corresponding dip 29t component according to one of the items 1 to 28, characterized in that the annular bead (5) and the ΈοΤϊΐΐβΒίιυχίββΐΐ (7;
13; 18; 20; 21; 26; 29; 32; '33; 34) by upsetting and
produces suitable deformation of the connecting wire (1)
are, .30, component according to item 29, characterized in that the annular bead (5) and the deformations are performed in a single operation.