EP0954001A1 - Relay with guided contacts - Google Patents

Abstract

The relay has a coil body with a magnetic coil (21), a core (23) a yoke (25,25') and an armature (27) on the control side. There is a separation wall between the control side and the output side with the output contacts. The contacts nearest to the control side are spaced by a minimal distance from the separation wall, and the output contacts are spaced apart by an insulation part, preventing electrocution currents. An Independent claim is included for a method of manufacturing a relay.

Description

Technical field of the invention

The present invention relates to a relay positively driven contacts for mains voltage after the The preamble of claim 1 or 2. The invention relates also a method of making the relay.

State of the art

There are two-contact and multi-contact print relays on the market known for mains voltage with positively driven contacts, at which each have at least one pair of spring contacts on this side and is arranged beyond a partition and the insulation between the control side and the output side of the EN 50020 standard regarding electrical equipment for hazardous areas (creepage distance inside the relay ≥ 10 mm, hereinafter also EEx insulation called), and in which the isolation between the individual contacts on the output side, a so-called "Safe separation" according to DIN VDE 0106 (protection against dangerous body currents), amplified or is double. Such relays are for example in Product catalog 98 of the applicant under the names SIR312 or SIR422 listed. The disadvantage of these relays is theirs Size. Despite the relatively small dimensions of those mentioned Relay of 46.4 or 58.9 x 16 x 30.7 mm, it is a concern the user to obtain even smaller relays if possible. With increasing miniaturization, however, compliance with Safety distances increasingly difficult.

It is also a relay with very small external dimensions of approx. 36 x 12.5 x 29 mm on the market. Are at this however, to achieve these small dimensions, the Contact springs twice between the foot and the contact head cranked, the closer they are to the coil are, all the more. Therefore, the partition is on one side everything arranged differently designed contact springs. The The relay mentioned does not, however, have EEx insulation Tax side and exit side on. Even the output side There are no plugs of different contact units double insulation on. Cranked contact springs are also more difficult to adjust than those between clamped foot and contact head no bends exhibit.

However, there are changeover contact relays in this Order of magnitude and with double insulation between the Changeover contact units and EEx insulation between the Output side and the tax side for some time on the Market. So e.g. the product catalog mentioned in the Applicant listed under the name SIR282. With this are the coil with core and yoke as well as the contact units cast in to make the relay washable. The anchor lies on the side of the Kitchen sink. The three contact springs of a changeover contact unit are very close to each other, with the middle moving Contact spring straight through the insulating support part runs through. However, the other two are in the clamped foot area each bent to at very close position of the contact springs a standard-compliant distance of approx. 5 mm between the connectors of the To reach change contacts. The dividing wall between the the two changeover contacts are located at the moving ends of the Contact springs between two ribs on the relay enveloping hood. This is the clearance and creepage distances long enough between the two changeover contacts to under reinforced insulation to certain conditions guarantee.

The contact springs must be used to mount this relay be placed in a prefabricated holding part. Then it will be this holding part equipped with contact springs and one Magnetic coil with core and yoke together in one Injection molding system cast into a single part.

Apart from that the contact units Change contacts are a disadvantage under certain circumstances Property of this relay that the carrier part by means of two separate casting processes must be produced.

Object of the invention

It is therefore an object of the invention to have a relay to create at least two positively driven contact units, where between the contact units on the output side double or reinforced insulation and between the Output side and the control side an EEx insulation is guaranteed, and its external dimensions compared to The external dimensions of known relays of this type are significantly smaller are. The contact springs should preferably be straight be guided to facilitate adjustment of the relay.

Description of the invention

According to the invention this is achieved in that the contact springs next to the tax side with one for your Adjust sufficient, minimal distance to the partition arranged and the output contacts with each other at least with a protection against dangerous body currents sufficient insulation are separated by the partition on the comb side of the coil former along the one isolated there The bobbin is extended. With such an execution can contact springs connected to the coil body with a minimal adjustment required Distance to the bobbin can be arranged since the air and the creep path extended through the one next to the bobbin Partition wall sufficient for double insulation is renewable. To reduce this distance between The relay becomes shorter on the control side and the load side.

Are the control side and the relay Output side with at least one for electrical Sufficient equipment for potentially explosive areas Isolation separated by the bobbin at least the side facing the exit side by a Partition wall and on the one connected to this partition Sides is insulated, and the anchor on the by the side of the coil body facing away from the output side arranged and with the output contacts through the comb on insulated coil former is connected over, so the Solution according to the invention can be implemented particularly easily. The insulation described between the electrical conductive parts of the control side and the output side by means of the partition and the insulation on it adjoining sides is on the comb side of the bobbin isolated anyway. Therefore, with the extension of the Partition against the anchor an extension of air and Crawl paths are reached, which is approaching the Allow output contacts to the control unit.

The contact springs between the contact head are advantageous and clamped foot end straight for better adjustment and not susceptible to different operating temperatures to be.

The coil with the plastic is advantageous on all sides molded around the carrier part or poured into the plastic. This makes the coil, and advantageously also the core with the coil and yoke, immovably fastened in the carrier part, so that the Location of the individual parts of the relay and the distances between them are unchangeably defined.

The carrier part is advantageous for tax and Output side manufactured in one operation, so that as few individual parts as possible have to be manipulated.

The creepage and clearance distance is advantageous for the through the comb moved ends of the output contacts around the Partition through a groove in the partition and one Cover, preferably in the form of a support member inserted hood, with perpendicular to the partition and parallel facing the comb and with one on this Rib arranged on the top side engaging in the groove extended labyrinthine. As a result, the partition needs no further over the movable end of the contact springs Be extended, as is room for the anyway Forced guidance with the comb is required.

Conveniently, the groove in the partition and the rib on the cover or hood until at least partially formed over the bobbin. The air and the creepage distance is with groove and rib over the coil body very small space extendable for double insulation.

The contact springs of the two are advantageous opposite, parallel to the partition Sides of the relay can be inserted into the carrier part. Thereby are they simple, e.g. through an interaction a bulge in the carrier part and a recess in the Contact spring or vice versa, precisely fixable in height. The clearances and creepage distances are expediently between the output contacts on the same side of the partition extended by partitions perpendicular to the partition.

The comb advantageously has a comb in two arms dividing incision on which arms each with the Contact springs on another side of the partition in Are intervention. It is also advantageous to open the partition a nose opposite each other trained which lugs on the facing away from the relay Side of the comb are arranged, and that the distance of the Tips of the two noses is larger than the width of the Incision. This will keep the comb in place after being inserted into it Carrier part is tight behind the noses and is nevertheless slidable. Is advantageous between the poor and that Incision formed at least one spring member on the comb, which interacts with the nose. These spring means give way when the comb engages in the carrier part, and enable it to snap into place without the arms of the Comb may run the risk of being deformed.

In the inventive method for producing the Relay according to the invention, a carrier part for the electrically conductive parts of the control side and the Output side manufactured in one piece and a magnetic coil the manufacture of the carrier part poured into this. This eliminates the need for various casting processes Production of various parts of the carrier part and the Coil with core and yoke is fixed in the plastic mass. This also creates rigid relationships, which at such precision objects are estimated.

The contact springs are advantageous from the two opposite sides parallel to a partition of the relay inserted into a clamping groove in the carrier part. This enables them to be retrofitted and able precisely fixable.

The comb is then advantageously placed in a Guide engaged, in engagement with the contact springs brought, and the function of the relay before putting on the Cover or hood checked. This allows the relay to be adjusted during and / or after the check. Is however, only with the hood closed Functional check possible, otherwise the comb will not is held or guided, is the intervention in the relay based on the measurement data found during the check much more difficult.

Brief description of the figures

Fig. 1

eine Seitenansicht eines erfindungsgemässen, vierkontaktigen Printrelais, ohne Haube,

Fig. 2

eine Aufsicht auf das Relais gemäss Figur 1,

Fig. 3

eine Ansicht der Ankerseite des Relais gemäss Figur 1 und 2, jedoch ohne die in das Trägerteil einzusetzenden Teile,

Fig. 4

ein Querschnitt durch das Trägerteil des Relais gem. Figur 1 bis 3,

Fig. 5

einen Längsschnitt durch die Haube für das Relais gem. Figur 1 bis 4,

Fig. 6

eine Aufsicht auf die Haube gem. Fig. 5,

Fig. 7

ein Querschnitt entlang der Linie A-A durch die Haube gem. Fig. 5 und 6,

Fig. 8

eine Ansicht einer langen, durch den Kamm bewegbaren Kontaktfeder für das Relais,

Fig. 9

eine Seitenansicht der Kontaktfeder gem. Fig. 8,

Fig. 10

eine Ansicht einer kurzen Kontaktfeder für das Relais,

Fig. 11

eine Seitenansicht der Kontaktfeder gem. Fig. 9,

Fig. 12

eine Seitenansicht des Kammes,

Fig. 13

eine Aufsicht auf den Kamm gem. Fig. 12,

Fig. 14

zwei Schaltschemata des Relais.

It shows:

Fig. 1

2 shows a side view of a four-contact print relay according to the invention, without a hood,

Fig. 2

a supervision of the relay according to Figure 1,

Fig. 3

2 shows a view of the armature side of the relay according to FIGS. 1 and 2, but without the parts to be inserted into the carrier part,

Fig. 4

a cross section through the support part of the relay acc. Figure 1 to 3,

Fig. 5

a longitudinal section through the hood for the relay acc. 1 to 4,

Fig. 6

a supervision of the hood acc. Fig. 5,

Fig. 7

a cross section along the line AA through the hood acc. 5 and 6,

Fig. 8

a view of a long contact spring for the relay, which can be moved by the comb,

Fig. 9

a side view of the contact spring acc. Fig. 8,

Fig. 10

a view of a short contact spring for the relay,

Fig. 11

a side view of the contact spring acc. Fig. 9,

Fig. 12

a side view of the comb,

Fig. 13

a supervision of the ridge acc. Fig. 12

Fig. 14

two switching schemes of the relay.

Description of the embodiment

In the embodiment shown in Figures 1 and 2 the invention are four on the output side Contact units with two contact springs 13/13 ', 14/14', 15.15 ', 16.16' arranged. Each contact unit has one long contact spring 13, 14, 15, 16 and a short contact spring 13 ', 14', 15 ', 16' on. There is one for each of these eight contact springs Assigned connector 17. On the tax side there are one Coil 21 with the core 23 and the two yoke parts 25, 25 'in the carrier part 19 cast. All four are in Figure 1 shown in dashed lines, the two yoke parts 25, 25 ' partly extend through the carrier part 19 and there are drawn in full lines. Also on the tax side the movable armature 27 (also dashed in Fig. 1) and the plug connections or connecting plugs 29 for the coil 21 arranged.

The connection between the anchor 27 and the switched contact springs 13,14,15,16 happens via a Comb 31. The comb 31 is inserted at points 33 with two bolts in two holes in the anchor 27. It lies in the U-shaped Guide 35. The comb 31 is on the one hand with the bolts in the holes in the anchor and on the other hand on the contact springs on. For this purpose, the contact springs have a recess. To the side and towards the hood there are 31 spacer knobs 37 on the comb and 37 'are provided. Go from an anchor-side bridge 39 in comb 31 two arms 41, 41 'and two spring members 43, 43' towards the exit side. Is between the spring members a recess 45 is provided which on both sides along the Partition 47 leads the movement of the comb 31. At the Partition 47 is formed a groove 49. This groove 49 ends on the one hand over the coil body and on the other hand at output-side end of the carrier part 19, being on both Ends is open.

The partition wall 47 is in the support part 19 on both sides Clamping grooves 51 formed in a foot part 53. In the Clamping grooves 51, the contact springs are inserted and therein fixed. Between the contact units 13/13 'and 14/14' and 15/15 'and 16/16' are partitions 55 for Extension of air and creepage distances provided.

3 and 4, the carrier part 19 is shown empty. Figure 3 shows the anchor-side end. Below are those two control-side connectors 29 for the coil 21, which is cast in the carrier part 19. As a metallic Surfaces are only on the surface of the carrier part 19 the two yoke parts 25, 25 'are visible. For the anchor is one Niche 57 formed in the carrier part. The anchor comes with a Anchor retaining spring, not shown, in the niche 57 held. The anchor retaining spring sits in the two Recesses 59 on the niche sides.

The niche 57 merges into the guide 35 at right angles. An extension 61 of the is located in the middle of the guide Partition 47. On the extension 61 there are lugs 63 formed, which with the spring members 43,43 'on the comb 31st cooperate and hold the comb 31 in the guide 35.

At the bottom around the carrier part 19 is on the control side Groove 65 formed to form a catchment space between the hood and the carrier part 19 as a capillary barrier for intrusion To form flux or other dirt.

The hood 67 is shown in FIGS. 5 to 7. The Hood 67 comprises the carrier part 19 with all of it and in it arranged parts on five pages. It is from the inserted on the comb side over the carrier part and closes relatively close around the foot part 53 and the groove 65. The attached hood 67 holds the anchor retaining spring in place firmly and definitely prevents the comb 31 from coming out again the guide 35 can jump. The knobs 37 'touch from inside the cover side 69 of the hood 67. On the cover side 69 a rib 71 is formed, which in the groove 49 in the Partition 47 fits. The rib 71 is as long as the groove 49 and is connected to the front side wall 73 of the hood 67. In the hood 67 three recesses 75 are provided, which cooperate with lugs 77 on the support part to the hood 67th to keep on the support member 19.

The contact spring 15 in Figures 8 and 9 and the Contact spring 13 ', 14', 16 'in Figure 10 and 11 consist of each a flat spring plate 79.79 'and one on it riveted contact head 81. The pin or connector 17 is made in one piece with the spring plate 79.79 ', by folding the plate 79, 79 'in the area of pin 17 and is pressed. Around the contact springs 13, 14, 16 or 15 ' only the contact head 81 must receive from the other Side riveted in the spring plate 79 or 79 '. So that the geometry e.g. the contact springs 15 and 16 to Inserting in the clamping grooves 51 is the same Foot area 83 of the spring plate 79.79 'by half Material thickness of the spring plate cranked. That’s it Spring plate 79.79 'and pin 17 axially aligned, see above that it's from one side as well as the other can be equipped with a contact head 81. Therefore, nevertheless the pin is arranged on one side and longer and shorter contact spring plates 79.79 'are required only two different contact spring plates 79 and 79 ' getting produced.

The spring plate 79 are only slightly longer than the spring plate 79 '. They have one at the top Recess on. In other words, they have an upper one Extension 85 above the contact head 81, which by the The size of the recess is narrower than the spring plate. This extension 85 is engaged with the comb 31. Sie is narrower than the rest of the spring plate because it is on the one hand does not have to carry electricity and on the other hand the space for the Rib 71, the septum 47, the comb 31 and the The space between the partition and comb is very narrow. This can reduce the depth of the relay and the comb be placed on the spring plate.

Figures 12 and 13 show the comb 31 with the two arms 41.41 'and the spring members 43.43' on the web 39. The knobs 87 sit in the anchor 27. The spring members 43, 43 'guide the comb along the partition 47 and are through the lugs 63 in the Lead 35 held. The two arms 41, 41 'are with identical slot arrangements provided. The slots are 89 for the moving contact springs of contacts, which at Activation of the solenoid can be closed (e.g. 13/13 ', 14/14', 15/15 '), the slots 89' for those which be opened (e.g. 16/16 '). Depending on the desired Only one or both slots 89 'are engaged with a long contact spring plate 79. Figure 14 shows the two possible switching schemes of the relay. Theoretically is with the illustrated comb 31 also the reflection of the asymmetrical upper circuit diagrams possible. At comb 31 is on the underside a stop 91 is formed, which with the partition 55 cooperates and the movement of the comb 31 and thus the contact springs 13, 14, 15, 16 are limited.

The relay shown in the figures has external dimensions 36.1 x 12.5 x 26.2 millimeters. Between control side and the output or load side There are a distance of more than 15 between connectors 29 and 17 mm. The connector spacing between the output side Plugs 17 are 5 mm from center to center between the Contacts on one side of the partition and 7.5 mm between the contacts on different sides of the partition 47. Inside are the distances between the contacts different sides of the partition at least 8 mm and between the electrically conductive parts of the control side and the load contacts on the output side at least 10 mm. The Contacts (e.g. 15/15 'and 16/16') on one side of the Partition 47 can be used as control contacts and the contacts (e.g. 13/13 ', 14/14') on the other side of the partition 47 are assigned as load contacts and are against each other double or reinforced insulation.

In summary it can be said that with one Relay for hazardous areas coil 21, core 23 and yoke 25, 25 'are cast in the carrier part 19. On both sides a partition 47 on the carrier part 19 are contact units 13/13 ', 14/14' or 15/15 ', 16/16' arranged. The anchor 27 is on the side of the coil 21 facing away from the contacts arranged. A comb 31 connects the anchor 27 on one Side with the movable contact springs 13,14,15,16 on the other side of the insulated coil. In the area in which the comb 31 runs past the coil 21, is on the carrier part 19th a guide 35 is formed for the comb 31. The dividing wall 47 has an extension 61, which in this Guide area 35 extends next to the coil 21. This Extension 61 and the partition 47 have a groove 49 provided, in which a rib on the covering the relay Hood stands in to the air and crawl of one to extend to the other side of the partition 47. Between the contacts and the electrically conductive parts of the Magnetic circuit are air and creepage distances of at least 10 Millimeters observed. Between contacts on one and the contacts on the other side of the partition 47 are double or reinforced air and creepage distances from provided at least 8 mm. The relay has four Only external dimensions of approx. 36.1 x 12.5 x 26.2 mm on.

Claims (13)

Relay for mains voltage with positively driven contacts, in particular a print relay, on the control side of which there is at least one coil body with a solenoid coil, core and yoke, an armature and control-side connector, on the output side of which there are positively driven output contacts on both sides and beyond of a partition and their connectors, and with a partition between the control side and the output side, characterized in that the contact springs closest to the control side are arranged at a minimum distance from the partition wall that is sufficient for their adjustment and the output contacts are separated from one another at least with insulation that is sufficient to protect against dangerous body currents, by the partition wall on the comb side Coil body is extended beyond the septum along the coil body isolated there. Relay for mains voltage with positively driven contacts, in particular a safety print relay for potentially explosive areas, on the control side of which at least one coil body with a solenoid coil, core and yoke, an armature and control-side connector and on the output side of which at least two with a comb, on both sides and one Output contacts arranged parallel to the direction of movement of the comb are arranged with contact springs aligned approximately parallel to the core and their connecting plugs are arranged in an insulating support part, in which relays the control side and the output side are separated by at least one insulation sufficient for electrical equipment for potentially explosive areas, by the Coil body is at least on the side facing the exit side by a partition and on the sides adjoining this partition is insulated, and the armature on the front Arranged n the side of the coil body facing away from the output side and connected to the output contacts by the comb past the insulated coil body, characterized in that the contact springs closest to the control side are arranged with a minimum distance to the partition wall sufficient for their adjustment, and the output contacts are at least one with the other insulation which is sufficient to protect against dangerous body currents are separated by extending the partition on the comb side of the coil body along the coil body isolated there. Relay according to claim 1 or 2, characterized in that the creepage and clearance in the through the comb moving ends of the output contacts around the partition around through a groove in the partition and one Cover, preferably one over the carrier part inserted hood, with perpendicular to the partition and parallel to the ridge facing and with one on this cover side arranged engaging in the groove Rib is labyrinthine elongated. Relay according to one of claims 1 to 3, characterized characterized that the contact springs between Contact head and clamped foot end are straight. Relay according to one of claims 1 to 4, characterized characterized that the coil on all sides with the Injection molded plastic of the carrier part or in the Plastic is poured in. Relay according to one of claims 1 to 5, characterized characterized in that the carrier part in one piece Operation is made. Relay according to one of claims 1 to 6, characterized characterized that the contact springs from the two sides of the relay running parallel to the partition forth can be inserted into the carrier part. Relay according to one of claims 1 to 7, characterized characterized that the air and creepage distances between the output contacts on the same side the partition through perpendicular to the partition Partitions are extended. Relay according to one of claims 1 to 8, characterized characterized that the comb one the comb in two Has arms dividing incision, which arms each with contact springs on each side of the Are engaged, and that on the Partition opposite each other on both sides one nose is formed, which nose on the from Relays facing away from the comb are arranged and that the distance of the tips of the two noses is larger than the width of the incision. Relay according to claim 9, characterized in that at least one between the arms and the incision Spring member is formed on the comb, which with the nose cooperates. Method of manufacturing a relay, thereby characterized that a carrier part for the electrically conductive parts of the control side and the output side is made in one piece and a solenoid at Production of the carrier part is poured into this. A method according to claim 11, characterized in that Contact springs from the two opposite, to one Partition parallel sides of the relay forth into one Clamping groove can be inserted in the carrier part. A method according to claim 11 or 12, characterized characterized that the comb is put on in a Guide engaged and engaged with the Contact springs is brought and the function of the relay is checked before putting on the cover or hood.

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