EP0223112A1 - Composant électromagnétique, en particulier relais et méthode pour le rendre étanche - Google Patents

Composant électromagnétique, en particulier relais et méthode pour le rendre étanche Download PDF

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Publication number
EP0223112A1
EP0223112A1 EP86114900A EP86114900A EP0223112A1 EP 0223112 A1 EP0223112 A1 EP 0223112A1 EP 86114900 A EP86114900 A EP 86114900A EP 86114900 A EP86114900 A EP 86114900A EP 0223112 A1 EP0223112 A1 EP 0223112A1
Authority
EP
European Patent Office
Prior art keywords
film
base body
housing
component
adhesive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP86114900A
Other languages
German (de)
English (en)
Inventor
Rolf-Dieter Dipl.-Phys. Kimpel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0223112A1 publication Critical patent/EP0223112A1/fr
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H01H50/023—Details concerning sealing, e.g. sealing casing with resin

Definitions

  • the invention relates to an electromechanical component, in particular a relay, with a base body which has at least one switching space containing moving parts and at least one further mounting space containing fixed parts and filled with potting compound, and with a housing which encloses the component in a cuboid shape, wherein an open side of the housing communicates with the other assembly space and is closed by filling the potting compound in such a way that the switching space is sealed liquid-tight both to the outside and to the other assembly space after the encapsulation by the housing and possibly the potting compound.
  • the invention also relates to a method for sealing such a component.
  • a liquid-tight encapsulation is generally desired, in order to prevent washing liquid and solder from penetrating into the contact space when the component swells on a printed circuit board.
  • a tight separation between the contact space and, above all, the coil winding space is sought, in order to prevent, in addition to an improved insulation of the winding from the magnetic circuit parts, the penetration of organic contaminants, for example from the wire insulation, into the contact space and, moreover, a better one To allow the coil heat to be dissipated to the outside.
  • DE-PS 29 01 077 describes a sealing method for a relay, the contact space located in the coil former being first pre-sealed by welding on a two-layer film. Then this bobbin is placed as a whole in a cap and cast in this cap. There is therefore a two-stage seal, whereby not only additional operations are required, but also the total volume of the relay is increased by the additional cap and its filling with sealing compound, since between the coil body serving as the base body and the cap at least on one or more sides there is a tolerance distance that is filled with potting compound.
  • the object of the invention is to provide a component of the type mentioned and to provide a sealing method therefor, the sealing between the control room and the additional assembly space and to the outside being achieved in a simple and space-saving manner, in particular an additionally pre-shaped housing, such as a cap and base, is not needed.
  • At least two of the closed, mutually perpendicular housing sides are formed by a film glued to the base body and bent over at least one edge, the base body, optionally in connection with inserted functional parts, the outer contours or bending edges as well as in the edge areas of the control room and the assembly room forms circumferential contact surfaces for the film.
  • the component according to the invention instead of a preformed housing made of a cap and optionally a base, for example produced in a complex injection molding process, only a simple and thin-walled film is used, which is only cut out flat and glued over the open housing sides of the base body. This saves a lot of volume, because not only the wall thickness of such a film can be significantly smaller than that of a rigid cap, but also the otherwise necessary gaps between the base body and a cap are eliminated.
  • the base body can nevertheless initially have all the necessary assembly openings, for example for applying a coil winding, for inserting magnetic circuit parts and contact elements.
  • This base body is merely shaped so that the outer contours of the cuboid housing are present as skeletons, so that the initially flat film gives the desired cuboid housing contour when it is applied. It is essentially sufficient if at least the housing edges in the corner areas are predetermined by the base body and possibly by additional functional elements, such as yokes or contact elements. With longer edges, however, it is useful if the film is also at least partially supported between the corners. In some cases it can also be expedient to provide a dimensionally stable intermediate part as a support for the film in a housing area.
  • the base body In order to ensure that the control room is closed off from the outside, the base body must also have all-round contact surfaces for the film as a continuous boundary of the control room. Circumferential contact surfaces are also required to limit the additional assembly space, for example a coil winding space, so that the casting compound poured in later only flows into the desired spaces.
  • the base body can of course already have closed sides.
  • two end faces of a relay housing in the form of a coil body are formed by closed walls of the base body, while an upper side and two long sides are closed by the glued-on film.
  • the last side usually the connection side with the solder pins, is usually used as a filling opening for the sealing compound, since this is the easiest and best way to seal the leadthroughs of the connection pins.
  • the film itself can be designed as a two- or multi-layer film, the inside being formed by an adhesive or hot melt adhesive or by another adhesive.
  • the adhesive layer can also be applied only partially, namely at the points which subsequently come into contact with the contact surfaces of the base body.
  • the functional parts are first assembled in the preformed base body, then the pre- cut film placed on one side of the base body, bent over the bending edges and pressed against the base body on all sides; then the sealing compound can be poured into the open side of the housing. If a hot-melt adhesive or a heat-melting plastic is used for gluing, the entire component is heated before or during the pressing of the film.
  • Fig. 1 shows schematically the base body of a relay in the form of a coil body 1 with two coil flanges 2 and 3 and an attachment 4 formed on the end face in front of the flange 2 to form a switching and contact space 5.
  • the coil body is provided with a winding 6;
  • a yoke 7 is attached to the winding and an armature 8, which is shown in the drawing, is arranged in the control room 5 and actuates contact elements (not shown further).
  • An adhesive film 9 is provided as the housing end, which is provided with adhesive webs 10 in the form of an adhesive adhesive bers or a hot melt adhesive is coated and which is placed over the top and the two long sides of the relay and glued to it.
  • the end faces 4a and 3a on the neck 4 and on the coil flange 3 are already closed anyway, so that no additional sealing is required.
  • the base body 1 has all-round sealing surfaces, so that the film over the top surface 12, the side surface 13, the lower side surface 14 and the flange side surface 15 continues over the top of the yoke 7 and the corresponding rear surfaces on the flange 2 and the neck 14 causes a continuous seal.
  • the film is also glued over the top and the side surfaces of the coil flange 3, so that the coil space 11 between the flanges 2 and 3 and the yoke 7 also forms a closed trough, which are filled with potting compound from the underside after the walls of the relay can.
  • the base body 21 has two flanges 22 and 23 as well as an extension 24 with the control room 25.
  • a yoke 27 is arranged above the winding 26, while an armature 28 is mounted in the control room.
  • the base body 21 forms the contours for a cuboid housing to which a film 29 shown in FIG. 3 is glued. Since a contact and bearing spring 30 for the armature is arranged on the upper side of the yoke 27, this yoke has a recess 27a in the area of the spring 30, so that a flat support and sealing surface for the film is ensured.
  • the yoke also has a recess 27b in the region of the lateral extension 30a of the contact spring 30 in order to make the side surface 32 of the yoke flush with the side surfaces 33, 34 and 35 of the base body.
  • the base body is reversed for sealing first returns with the top of the yoke 27 placed on the middle section 29a of the film 29 shown in FIG. 3. Then the side tabs 29b and 29c are folded up in the direction of the arrow and placed over the long sides of the relay. Finally, the front flap 29d of the film is placed over the end face 23a on the coil flange 23 and glued on. This results in a relay with a closed housing on five sides as shown in FIG. 4, the pins 36 are up. Only the coil space 31 is open to the outside, so that it can be closed in a conventional manner by pouring in casting compound.
  • the base body 41 contains the functional parts already mentioned above, so that they are no longer described in more detail.
  • the side surfaces 47, 48 and 49 visible on the front complement a corresponding circumferential sealing surface for the switching space 50, which also encloses a spring 51 placed laterally on the yoke.
  • a film 52 is used as a closure for the base body, which is placed both with its central part 52a over the top of the relay and with four side tabs 52b, 52c, 52d and 52e over the four side surfaces of the base body 41.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Control Of Electric Motors In General (AREA)
EP86114900A 1985-10-30 1986-10-27 Composant électromagnétique, en particulier relais et méthode pour le rendre étanche Ceased EP0223112A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3538621 1985-10-30
DE3538621 1985-10-30

Publications (1)

Publication Number Publication Date
EP0223112A1 true EP0223112A1 (fr) 1987-05-27

Family

ID=6284837

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86114900A Ceased EP0223112A1 (fr) 1985-10-30 1986-10-27 Composant électromagnétique, en particulier relais et méthode pour le rendre étanche

Country Status (3)

Country Link
US (1) US4713727A (fr)
EP (1) EP0223112A1 (fr)
JP (1) JPS62105330A (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1638380A1 (fr) * 2004-09-15 2006-03-22 Schreiner Group GmbH & Co. KG Procédé de fermeture de boîtiers avec couvercles en feuille et boîtier ainsi fermé
CN108550500B (zh) * 2018-04-27 2019-07-30 景德镇品安特陶有限公司 高电压直流继电器的陶瓷密封工艺
DE102018212380A1 (de) * 2018-07-25 2020-01-30 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Bamberg Elektronik eines Kraftfahrzeugs

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3756399A (en) * 1971-08-30 1973-09-04 Westinghouse Electric Corp Skin package for an article and method of forming the package
DE2520169A1 (de) * 1975-05-06 1976-11-18 Siemens Ag Allseitige isolierung
DE2535173A1 (de) * 1973-01-30 1977-02-24 Siemens Ag Verfahren zum herstellen einer feuchtedichten umhuellung fuer elektrische bauelemente oder bauelementekombinationen
DE2901077A1 (de) * 1979-01-12 1980-07-17 Siemens Ag Verfahren zur abdichtung eines elektromagnetischen relais
EP0129068B1 (fr) * 1983-05-20 1987-04-15 Siemens Aktiengesellschaft Relais électromagnétique miniaturisé et méthode de fabrication

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3378626A (en) * 1966-01-06 1968-04-16 Noel C. Tucker Method and product for shielding windings
DE3131019C2 (de) * 1981-08-05 1985-04-11 Standard Elektrik Lorenz Ag, 7000 Stuttgart Elektromagnetisches Relais
DE3239047C2 (de) * 1982-10-22 1986-01-16 Standard Elektrik Lorenz Ag, 7000 Stuttgart Elektromagnetisches Relais
US4509098A (en) * 1983-02-24 1985-04-02 At&T Bell Laboratories Electrical printed wiring circuit board construction
DE3318581A1 (de) * 1983-05-20 1984-11-22 Siemens AG, 1000 Berlin und 8000 München Verfahren zur abdichtung eines elektrischen bauelementes, insbesondere eines relais, sowie nach diesem verfahren abgedichtetes bauelement

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3756399A (en) * 1971-08-30 1973-09-04 Westinghouse Electric Corp Skin package for an article and method of forming the package
DE2535173A1 (de) * 1973-01-30 1977-02-24 Siemens Ag Verfahren zum herstellen einer feuchtedichten umhuellung fuer elektrische bauelemente oder bauelementekombinationen
DE2520169A1 (de) * 1975-05-06 1976-11-18 Siemens Ag Allseitige isolierung
DE2901077A1 (de) * 1979-01-12 1980-07-17 Siemens Ag Verfahren zur abdichtung eines elektromagnetischen relais
EP0129068B1 (fr) * 1983-05-20 1987-04-15 Siemens Aktiengesellschaft Relais électromagnétique miniaturisé et méthode de fabrication

Also Published As

Publication number Publication date
US4713727A (en) 1987-12-15
JPS62105330A (ja) 1987-05-15

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Inventor name: KIMPEL, ROLF-DIETER, DIPL.-PHYS.