DE8524259U1 - Electromagnetic relay - Google Patents

Description

■ · 4

• I *

PS35.2 Sheet 4

Description

The invention relates to an electromagnetic relay of the type specified in the preamble of claim 1.

In the case of electromagnetic small relays with a base plate t which has the electrical connections, it is often difficult to connect the other components - such as the

&Igr;&Ogr; the yoke carrying the drive coil - to be connected to the base plate in such a way and to provide the assembled unit with a cover cap so that on the one hand assembly is easy to carry out and on the other hand the unit can be dismantled again if necessary without difficulty and without special effort - and in particular without destroying components.

The invention specified in claim 1 is based on the object of remedying this situation and providing a solution consisting of a few components that does not require any additional connecting elements.

The arrangement according to the invention is particularly advantageous in that a carrier plate for functional elements inserted between the base plate and the yoke carrying the drive coil can be inserted in a correspondingly removable manner without the assembly properties of the relay as a whole being impaired. The arrangement according to the invention is particularly advantageous when using a transverse coil which in particular actuates two hinged armatures which in turn act on spring contacts whose spring

&kgr;&igr; la ti ·· Ii lit···

Il <··· « · · 1 II«

&igr;·· · · &igr; in 1 &igr; t # &phiv;

Il > . . &igr;&igr; » &igr; < &igr;&igr; ·

ti &igr; · &igr; · I I I I ·

It· III··»·· ·· ti ti *·«

PS35.2 Sheet 5

lines are aligned parallel to the base plate. In this way, on the one hand, the electrical contact elements leading outwards are arranged in the immediate vicinity of the contact springs, and on the other hand, the drive and transmission parts can be easily inserted or snapped in from above. The housing cap that is then fitted fixes the drive parts in their position and thus forms a safeguard against components being accidentally released. A stop provided on the housing cap secures their defined position.

The various components are assembled as follows: The base plate is pre-assembled and an intermediate support plate, in which additional transmission elements are guided, is mounted. The intermediate support plate, like the base plate, has cheeks that stand up on the sides and form a "U" and is inserted between the corresponding cheeks of the base plate. The yoke and its webs, which give it an overall H-shaped structure, are inserted into recesses in the upper area of the side cheeks of the base plate, so that the intermediate support plate is held in place at the same time. The U-shaped cheeks of the intermediate support plate are designed in such a way that in the operating position they rest against the underside of the yoke by means of (plastic) springs as compensating elements and the intermediate support plate is thus clamped between the base plate and the yoke - which can be conveniently achieved by the appropriate local arrangement of the recesses to accommodate the web-shaped ends of the yoke. The ends of the yoke’s webs allow a slight displacement of the yoke in the direction

··'&igr;&iacgr; « . >·&igr;&igr; iiiill &lgr;

J·' · · · · I ) I)IIt

¹¹ · · · t · I 1 &igr;&igr;&igr; a

&bull;'' I)IIIt ₁ . · <>| ti H ₁

PS35.2 Sheet 6

The webs can be moved freely, whereby the web ends can each pass through the recess. This mobility is advantageous for the assembly of the yoke, so that no or only a slight deformation of the plastic part forming the base plate is necessary for the web ends to snap into the recesses in the side walls of the base plate.

* is manoeuvrable. By putting on the cap all parts

fixed because the corresponding inner surfaces of the cap lie directly on the outer surfaces of the side walls of the base plate j 10 and thus also hold the yoke in place.

The movement of the cap in the direction of "putting on" is limited by projections on the inner surfaces, which alternate

·. effect with the upper end surfaces of the side walls of the

In this way, when the relay is mounted, all fixed components are in stable

f ler way mutually locked, but can be removed

The cap can be easily removed within a short time.

Manufacturing tolerances are absorbed by the elastic materials or the spring elements provided at the interfaces.

The solution according to the invention is particularly advantageous for symmetrical double-armature relays with a horizontally arranged coil.

Advantageous further developments of the invention are characterized in the subclaims or are presented in more detail below together with the description of the preferred embodiment of the invention using the figures. They show:

/7

· S (I · » Il Il *| (III

f t f · · I · « I IiI

* » * · itit i(iit

* * aatifitii *

ft I t IBlIIl *

k t » lilt ati· Ii Il ·■ · · ·

PS35.2 Sheet 7

Figure 1 shows an embodiment of the relay according to the invention in the assembled state in a side view and

Figure 2 is an exploded view of the same embodiment, viewed obliquely from below.

The description will be made in parallel with simultaneous reference to Figures 1 and 2.

The base plate 1 is U-shaped and accommodates the flat plug connectors 2 for contacts |

I and drive the relay. In the example shown, two closing contacts, consisting of a fixed contact 3 and a movable spring contact 4, are

as contact sets. The two contact sets are I

in each case separated by a vertical partition wall 5 1

divided chamber. In the drawing, |

only the front chamber is visible, with the wall covering the interior \

connections of the flat plugs meandering or under Ab- f

division of chambers so that their electrical |

Separation is ensured. |

The meandering partition wall contributes significantly to the strength of the base plate 1 of the relay, which forms a base group, whereby the wall 5 is on the one hand a connecting element ^of the side cheeks 6 and 7 of the base part and on the other hand serves as a support surface for further horizontally extending elements to be inserted between the side cheeks. The side cheeks 6 and 7 are reduced in their wall thickness compared to the wall thickness in the area of the partition walls 5, so that when made of plastic they have a

4 i &igr; it* ti« t * "'"&igr; , * «,ti * ' * * * # &Iacgr;&idiagr;! Il ill « · t &igr; · ******* I*

* * > Il · f ■ 8th &igr; t t · I &ldquor; &bull; 1 » 1 · &igr;
' · ( · · t > &bull; · «II Sheet

PS35.2

have an elastic spring effect. A cover plate 8 is placed on the base plate 1 - or inserted between the side cheeks 6 and 7 of the base plate 1 - which also has a U-shaped contour and is supported by the lateral legs of the "U" on the side cheeks 6 and 7.

The cover plate 8 has, on the one hand, openings 9 and 10, which enable the contact spring sets 4 to be actuated in the area of the base plate through the cover plate 8 by means of pins 11 and 12 forming intermediate links. The openings 9 and 10 are provided with cylindrical - downward-pointing - projections 9a and 10a. The upward-pointing cylindrical projection 13 has a recess 14, which is cut for part of its diameter in the area of the surface of the cover plate 8 and allows a spring element 15 forming a locking element with symmetrically bent ends to reach the pin 11 through the cylindrical element 13 and penetrate into the recess provided there within the cross-section of the bore 9 in order to block the movement of the pin in the axial direction. The same applies to hole 10 and pimple 12.

The side legs 16 and 17 of the "U" of the correspondingly shaped cover plate 8 have semi-circular spring elements 18 and 19 or 20 and 21 at their upper ends, which, in terms of their height in the assembled state of the parts 1 and 8, extend in the relaxed case into recesses 23 and 24 or 25 and 26 and

·< 11 «i «> a it im ti

*'*'· III 11*1 I I

JJ I I I t I I I III!

&bull; > · ■· &igr; m &igr; 111 &igr;&igr;&kgr; ' &igr; ■ '

Ill Il &Igr;· 1 > Il · · I . J y/&iacgr;

I ₁ &igr;··· 1 II ■ · > I //|

I « I · « Sill BIIlI

PS35.2 Sheet 9

secure elements engaging in these recesses against displacement. The cover plate 8 thus simultaneously forms an upper cover for the electrical contact elements or connection lugs of the flat plugs 2, so that the electrical insulation values can be maintained here without additional measures.

Lugs 27 and 28, which extend the lateral legs forming the "U" downwards over the horizontal plane of the cover plate 8 and engage in the corresponding recesses of the base plate 1, secure the two workpieces 1 and 8 in the pre-assembled state against lateral displacement.

The drive element for the contact sets of the relay shown here is a magnetic coil 47, which is formed by a winding of enamelled copper wire on a coil body 29 and an iron core 30. A yoke 31 is connected to the coil body 29, which has web-shaped projections 32 and 33 or 34 and 35 at its ends extending in the longitudinal direction of the coil body 28, which are each aligned parallel in pairs and form a U-shaped structure in the horizontal plane, which can be viewed as "H"-shaped if all webs 32 to 35 and the yoke are considered together.

The lugs 32 to 35 make it possible to mount the coil carrier with the other drive elements for the contacts in a particularly simple manner.
30

After the cover plate has been inserted, the side cheeks 6 and 7 are used as legs of the U-shaped base plate 1

/10

4 4· I tt * I > * *

M «it iff tat* &igr;

4 « I IMM I ii*l

&bull; I I ( t * · t

ti Mf Hit I MfI"* * *

t *

ft j ■ *

PS35.2 Sheet 10

bent sideways and after inserting the cover plate 8, the yoke 31 with the coil 47 is inserted. The web-shaped projections 32 to 35 of the coil body are secured against lateral displacement in the recesses 23 to 26 of the side cheeks 6 and 7 of the base plate 1 by the bent spring projections 18 to 21 of the cover plate.

This means that the pre-assembled, operational relay is ready to undergo the necessary tests during production. At the same time, the relay can also be dismantled without causing any damage, so that any necessary adjustments can be made at any time.

A cup-shaped housing cap 36 is dimensionally adapted to the external dimensions of the base plate 1 and is placed over the side walls 6 and 7, where it is held without play. The yoke 31 is laterally limited and held in the middle by the attached cup-shaped housing cover 36, so that the yoke is automatically centered when the cup-shaped housing cover 36 is placed on top.

Angled armatures 37 and 38 are provided on both sides of the core 30, which are mounted between the web-shaped projections 32 and 33 or 34 and 35. Since the armatures form an angle that is slightly larger than 90", the tracks 39 and 40 provided on their lower angled end act on the upper sides of the pins 11 and 12, respectively, and thus indirectly actuate the contact sets located on the base plate.

4 1«« tt *

i t * t

tit At*

« * · 4 ti

111 MH *

> « I (t «· l< (I MIM«

It C t · · I · I f III Mi < · lall &igr;&igr;&igr;&igr; <

Ii r j » ( &igr; · t &iacgr;&idigr;&igr; ·

Il I · I < I t I I ·

) · t I I I I I I I I I Il Il It IM

PS35.2 Sheet 11

The two armatures 37 and 38 are held and pivotably mounted by means of "E"-shaped spring elements 41, whereby the spring element 41 is shown separately again in Figure 2 to the right of the coil body.
5

When assembling the complete coil anchor system, the two anchors are inserted laterally between the web-shaped projections 32 and 33 or 34, 35. By rotating the assembly by 180", the two anchor parts can be identically designed, but the flags 39 and 40 lie next to each other in the plane and are spatially adjacent to the two pins 11 and 12 for force transmission. In order to lock the anchors in a rotatable manner, the "E"-shaped spring element 41 is inserted from above between the web-shaped projections 32 and 33 or 34 and 35, whereby the webs have projections 50 that widen in a step-like manner in the outward direction, behind which the outer legs of the "E"-shaped spring element are supported. The middle leg of the "E" protrudes from the plane of the other two legs in the direction of the anchor due to its spring force and has an extended projection 42 that is slightly angled or bent in the direction of the anchor 37.

The projection 42 rests against the back of the outer surface of the anchor, which is sharply rounded to form the bend, and secures it against falling outwards. The anchor itself has recesses in the area of its sharp bend in the vicinity of the webs 32 and 33 (or 34 and 35), which are limited by steps 51 and adapted to the recesses 50 between the webs 32 and 33.

/12 I

·' < ' M 1» It · 1 ,

■ t l< ····«! 1

« · I I I I I I H ·· (, I I I I I

PS35.2 Sheet 12

and thus secure the anchor inserted between these webs against falling out downwards or unintentionally moving.

The spring element 41 forms an essentially force-free limitation of the bearing of the respective anchor, but is held in position by the pre-tension of the middle leg of the "E" and is secured against falling out by the bend 42. In this way, the anchors are secured in their position by inserting a single element that can be inserted from above, whereby other more complicated bearing means such as axles and the like are not required. The bearing formed in this way can also be dismantled again without difficulty with a single movement, whereby production can be carried out in an expedient manner at any level of automation.

A further variant, not shown, which fulfills its purpose accordingly, can be realized by omitting the middle leg of the "E" of the spring element and by bending the two outer legs in the area of their outer ends on the inside, which corresponds approximately to the end 42 of the middle leg.

The relay shown as an example is equipped with two separate armatures 37 and 38, which are attracted together when the coil is permeable to current. In normal operation, the contact sets driven by the two armatures are actuated together. When switching

«ti I at «· 4· ·····«

all » · · a it* ·· ·<·.

«&igr;&igr; I t · t · t · ·

III Uli Mil ·■■· «« <' <·'

PS35.2 Sheet 13

For processes that require a high degree of reliability in switching off, as is the case with the windings of household appliances, for example, the two sets of contacts, each containing a normally open contact, are connected in series and open together when the armature drops, so that the two air gaps created between the contacts each prevent the flow of current.

The clearances when the contacts are open are dimensioned in such a way that each one ensures a shutdown. If, during the operating life of the device, one of the contacts welds together or one of the armatures sticks, the power is switched off by opening the other set of contacts.

In the relay shown here, additional measures ensure that if one of the contact sets has not opened effectively, the closing of the other contact is prevented during a subsequent actuation process. The purpose of this measure is to ensure that the relay or the consumer switched on by the relay does not continue to operate if one of the contacts fails. Since in this case the second of the contact sets can still close, the required safety of the shutdown is no longer guaranteed, since during further operation there is a risk that the other contact will also become inoperable and thus a fault that must be avoided at all costs could occur.

The invention is not limited in its implementation to the preferred embodiment given above.

Ill It > · 11 > I I I I I I I

&igr; i I < &igr;&igr;&igr;&igr; ill

IiI i i till · &igr;&Idigr;&igr; ·

I > I «1)111*11 B

Ii j i &igr;&igr;&igr;&igr;&igr;&igr;&igr; ·

111 IJIIIlII if Il I I ill

PS35.2

Sheet

Rather, a number of variants are conceivable, which make use of the solution presented even in fundamentally different designs.

Claims (8)

&bull; · 9 &bull; · ■ Paul & Siedler GmbH & Co KG 21 August 1985 Mahlower Str. 24 D-1000 Berlin 44 PS35.2 Electromagnetic Relay Claims 1. Electromagnetic relay with a base plate carrying electrical connection elements, a yoke parallel to this base plate and a removable cover cap with at least two opposing inner surfaces that are essentially parallel to one another, Ill II· III Il II III ··· I · -· ' · ,&igr;&igr;&igr; ...» · ; hi I I · t Il · · ti III ·!·< · I·· I I ·· I· PS35.2 Sheet 2 characterized, that the base plate is U-shaped and has side walls which cling to the inner surfaces of the cover cap from the inside, whereby recesses are provided in the side walls at the level of the yoke, which allow web-like projections to pass through, which form extensions of the yoke and whose ends extend to the inner surfaces of the housing cap. 2. Relay according to claim 1, characterized in that an additional carrier plate for puncture elements is inserted between the base plate and the yoke within the U-shaped projections. 3. Relay according to claim 2, characterized in that the additional carrier plate is loosely placed on support surfaces of the base plate, whereby f spring elements connected to the additional carrier plate which are provided for on the web-like approaches of the Support the yoke.
25 4. Relay according to claim 3, r" a characterized by that the spring elements are designed as curved tongues made of plastic material connected on one side to the support surface. I * H ti It 1 Il IMl Il * I I «te «II ti Ii Ii* &igr;&bgr;&igr; IM* &igr;&igr; Il * * $ t * * t · lit Il * * * · I i II III I · * · · «ifllll t. ItI if ij ·« ti iiitfc > &igr; r . t . t * t t til til · · ■ ■ H «till ItI < I 1 · · · · I ti ti it lit PS35.2 Sheet 3 5. Relay according to one of the preceding claims/characterized in that the cap has projections on its inside which limit its path towards the cheeks of the base plate when it is placed on the latter. 6. Relay according to one of the preceding claims, characterized in that the drive coil is connected to the yoke and is arranged parallel to the base plate carrying the electrical connection elements. 15 7. Relay according to one of the preceding claims, characterized in that two hinged armatures are provided. 20 8. Relay according to claim 7, characterized in that the two hinged armatures are arranged essentially symmetrically. /4