EP0410984B1 - Spool body and process for producing a spool body - Google Patents

Spool body and process for producing a spool body Download PDF

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Publication number
EP0410984B1
EP0410984B1 EP89904004A EP89904004A EP0410984B1 EP 0410984 B1 EP0410984 B1 EP 0410984B1 EP 89904004 A EP89904004 A EP 89904004A EP 89904004 A EP89904004 A EP 89904004A EP 0410984 B1 EP0410984 B1 EP 0410984B1
Authority
EP
European Patent Office
Prior art keywords
coil former
coil
legs
continuations
carrying area
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.)
Expired - Lifetime
Application number
EP89904004A
Other languages
German (de)
French (fr)
Other versions
EP0410984A1 (en
Inventor
Michael Dittmann
Dieter KÖLLING
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 EP0410984A1 publication Critical patent/EP0410984A1/en
Application granted granted Critical
Publication of EP0410984B1 publication Critical patent/EP0410984B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01H50/44—Magnetic coils or windings
    • H01H50/443—Connections to coils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/04—Arrangements of electric connections to coils, e.g. leads
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/0056—Apparatus or processes specially adapted for the manufacture of electric switches comprising a successive blank-stamping, insert-moulding and severing operation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H01H50/04—Mounting complete relay or separate parts of relay on a base or inside a case
    • H01H50/041—Details concerning assembly of relays
    • H01H50/043—Details particular to miniaturised relays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/44—Magnetic coils or windings
    • H01H2050/446—Details of the insulating support of the coil, e.g. spool, bobbin, former

Definitions

  • the invention relates to a coil body for an electromagnetic relay, with a supporting area for a coil winding and with connection elements, each of which has a section which can be connected to the winding ends of the coil winding and a further section which is designed as a connection contact, at least one connection element having an extension which arranged in the direction of the coil axis and embedded in the supporting area of the coil body, and to a method for producing a coil body according to the preamble of claim 11.
  • connection elements are jointly embedded in one of the coil flanges.
  • an extension of one of the connection elements is partially embedded in the wall of the coil tube, but only over a very small part of the axial length. Due to the embedding, this extension is only partially covered, since it serves to contact the start of the winding and thus must have at least one bare surface that is not covered by the plastic material for the winding.
  • a similar coil former is known from DE-A-33 18 493.
  • This known bobbin has a support area for a coil winding, which is laterally delimited by two flanges arranged transversely to the longitudinal axis of the bobbin.
  • the coil former also contains connection elements, each of which has a section that can be connected to the winding ends of the coil winding and each has a further section designed as a connection contact.
  • the connection elements each have an extension, which extends outside the coil winding partially in the direction of the longitudinal axis of the coil body and is embedded with its end region in the respective flange.
  • a flat core is embedded in this coil former, through which the coil former also obtains a relatively high mechanical strength in the supporting area.
  • DE-A-1 464 310 also describes a coil former with wire-shaped connection contacts, in which these connection contacts are subsequently inserted into grooves in the coil former.
  • the only purpose of these wires is to conduct the coil current from the connection side on one coil flange to the winding end on the other coil flange. Since these connecting wires lie loosely in open slots, they cannot contribute to stabilizing the coil body. In order to avoid axial displacement of these loosely inserted wires, they must be secured by additional measures, such as by cropping or by gluing.
  • a bobbin of the type mentioned at the outset is characterized in that the extension of the at least one connecting element runs through the supporting area or the extensions of several connecting elements pull the supporting area together, with the exception of an insulating gap, and in order to stiffen the supporting area the extension or the extensions are or are completely closed off from the winding by the material of the coil former.
  • the design according to the invention gives the coil body a high mechanical strength and thus contributes to improving the mechanical properties of a relay with such a coil body. In this way, the space requirement of the coil body and of the entire relay is advantageously significantly reduced without a loss of mechanical strength.
  • the coil former according to the invention is advantageous because without an additional structural element, its stability and mechanical strength can be increased simply by using a connecting element with a correspondingly designed and arranged extension.
  • the embodiment of the coil former according to the invention is particularly advantageous if it has one or more cavities and / or is made in several parts.
  • connection elements can be designed in such a way that their extensions have, for example, a U-shaped, Z-shaped or an elongated shape which extends essentially in the longitudinal axis of the coil body.
  • each extension has one or more legs running in the longitudinal direction of the support area. This configuration is particularly advantageous in terms of production technology. For a further increase in the strength of the coil former, it is advantageous that the legs of two projections run parallel to one another, at least partially overlapping one another, in the supporting region.
  • the one extension has at least two parallel legs of different lengths and that the other extension has the same number of parallel legs of corresponding lengths, so that gaps are formed between the opposing ends of the legs be in different planes perpendicular to the longitudinal axis of the coil body.
  • the mechanical weak points which occur as a result of the gaps serving to mutually isolate the connecting elements between the ends of the legs can be relocated to different regions of the coil former and thus the mechanical properties of the coil former can be influenced favorably.
  • a further advantageous embodiment of the bobbin according to the invention is that the legs of the extensions are connected to one another via at least one structural unit which is at least partially located within the supporting region of the bobbin.
  • the connection elements form in that their extensions are connected to one another via the at least one structural unit, in terms of production technology a unit that is easy to use.
  • the structural unit can be designed as a purely mechanical connecting element of the extensions and connect the extensions electrically insulated from one another.
  • connection elements can also run in the supporting area of the coil body in such a way that they do not touch and are therefore isolated from one another.
  • the connecting elements it is also possible for the connecting elements to be connected via an elongated non-conductor and for the non-conductor to lie in the region of the support area of the coil former and thus in principle to form the extensions of the connecting elements which are combined to form a material unit.
  • connection elements In principle, it is also conceivable for the extensions of the connection elements to overlap or to abut one another to carry out and to connect and to avoid direct electrical contact by suitable insulation measures, for example by interposing an insulation film. From an economic point of view, it is expedient to produce the connecting elements with their extensions from sheet metal, for example by stamping, and to ensure their mutual insulation, as already mentioned, by gaps between the ends of their legs.
  • a further advantageous embodiment of the coil former according to the invention provides that the structural unit consists of at least one additional electrical component and that the legs of the extensions are electrically connected to one another via the additional electrical component.
  • one or more additional electrical components for example diodes or resistors, can be connected to one another or to the connection elements for connecting the coil winding in the desired circuit arrangement. It is u. U. required that the legs more areas isolated from each other exhibit.
  • the space requirement of the coil body is not significantly increased despite additional electrical components and also has a positive influence on the mechanical behavior of the coil body.
  • the assembly can consist exclusively of an additional electrical component. However, it is also conceivable to use a uniform housing in which any additional electrical components are introduced.
  • Advantageously designed contacting elements can then be led out of this housing.
  • Such a standardization of the structural units used facilitates automation of production, since structural units that perform different functions can be processed with the same feed and handling devices. If, as already mentioned, the assembly is only to perform an insulating function, it is possible, when using the same housing, the contacting elements of which are in no way connected to one another, to also feed this assembly to the manufacturing process with the same feed device or to handle it with the same handling devices.
  • a further advantageous embodiment of the coil former according to the invention provides that the at least one structural unit is arranged to bridge at least one gap between the ends of the legs of the extensions. This arrangement of the at least one structural unit at least partially compensates for the mechanical weak point caused by the gap.
  • An embodiment of the coil body which is advantageous in terms of production technology is that the at least one structural unit is arranged to bridge at least one intermediate space formed between the parallel legs of different extensions.
  • the manufacturing unit formed from the connection elements with their extensions and the structural unit always forms a structural unit if the gaps between the ends of the legs are only produced after the structural unit has the between parallel legs of different extensions formed gap has been applied bridging.
  • the intermediate space formed between the legs of the extensions and the structural unit are dimensioned such that the structural unit can be at least partially inserted into the intermediate space.
  • a further advantageous embodiment of the bobbin according to the invention provides that in the case of a bobbin with a cavity in the direction of its longitudinal axis, at least one pole plate of at least one contact element is arranged in the region of the cavity, and that the contact element is at least partially surrounded by the material of the coil body, so that an additional Increasing the mechanical strength of the coil body is achieved.
  • the coil former according to the invention such that the at least one pole plate of the at least one contact element is arranged in a plane parallel to the legs in such a way that it lies in the region of at least one of the gap formed between the ends of the legs.
  • This at least partially compensates for the mechanical weak point of the coil former caused by the gap between the ends of the legs.
  • the influence of all the gaps, which affects the mechanical strength can be compensated in this way. For this it is necessary that the gaps are arranged in such a way that they all lie in an area which lies opposite the pole plate arranged in a plane running parallel to the legs.
  • the mechanical strength of the coil former according to the invention is further increased with a corresponding arrangement of the gaps if more than one pole plate is used. From a manufacturing point of view, it is particularly advantageous that in the case of a two-part coil former the connection elements are contained in one coil former part and the at least one contact element is contained in the other coil former part.
  • a method for producing the bobbin according to the invention provides that a manufacturing part is used which contains the connection elements for at least one bobbin each having an extension, and that the manufacturing part is extrusion-coated with plastic in such a way that the supporting area is formed in the region of the extensions.
  • a production part designed in this way is advantageous because it is easy to handle and can be easily and securely positioned and fixed in the casting mold for producing the coil former.
  • An advantageous development of the method according to the invention for producing a coil former with at least one contact element provides that a further production part is used which contains the at least one contact element, and that the further production part is extrusion-coated with plastic in such a way that the at least one a pole plate of the at least one contact element lies in the area of the support area.
  • the use of a production part is advantageous because it enables easy handling and precise fixing of the at least one contact element in the casting mold.
  • a production part which contains the connection elements for at least one coil body that the Manufacturing part is overmolded with plastic in such a way that the supporting area part of one coil body part of the coil body in the area of the extensions arises that a further manufacturing part is used which contains at least one contact element, that the further manufacturing part is overmolded with plastic in such a way that a supplementary coil former part of the coil former is formed, the supporting region part of the supplementary coil former part being formed in the region of the at least one contact element, and that the two coil former parts are joined together to form the coil former.
  • a production part with gaps between the extensions of the connection elements is used and the at least one structural unit is connected to the extensions of both connection elements before the encapsulation with plastic.
  • the gaps can be created simultaneously with the manufacture of the connection elements; this is particularly advantageous if the assembly is arranged so that it bridges at least one of the gaps.
  • a further advantageous development of the method according to the invention provides that a production part with connecting elements connected to one another on the extensions is used, that the structural unit is connected to the extensions of both connecting elements and that the gaps necessary for the electrical insulation of the connecting elements are subsequently produced before the encapsulation done with plastic.
  • This is advantageous from a manufacturing point of view, because the application of the structural unit first creates an additional mechanical connection of the extensions of the two connection elements before the extensions, which are still connected to one another, are separated from one another by producing the gaps.
  • the connection elements with their extensions and the applied structural unit always form a structural unit which can be handled advantageously during the production process.
  • connection elements 106 and 107 extending at right angles to the longitudinal axis of the coil former 101 are embedded in the coil former 101 in the region of its flanges 104 and 105 and each have a section designed as a connection contact 108 and 109 and a section connectable to the winding ends of the coil winding 103.
  • 1 shows only the section of the connection element 107 which can be connected to the coil winding 103 and is designed as a contacting tab 113.
  • connection element 107 has an extension 111, which extends in the direction of the longitudinal axis of the coil former 101 into the support region 102 of the coil former 101 and extends through this into the region of the flange 104.
  • the extension 111 is embedded in the material of the bobbin 101 in the support area 102.
  • the connector 106 is designed in its length so that electrical contact of the connection element 106 with the connection element 107 via the extension 111 is avoided.
  • the extension 111 embedded in the support area 102 gives the coil body 101 high mechanical strength with a relatively small wall thickness in the area of the support area 102.
  • a bobbin 1 contains a support area 2 for a coil winding 3.
  • the support area 2 is delimited by two lateral flanges 4 and 5 arranged in planes perpendicular to the longitudinal axis of the bobbin 1.
  • Connection elements 6 and 7, which lead away from the coil former 1 at right angles to the longitudinal axis of the coil former 1 in the exemplary embodiment shown, taper towards sections which are designed as connection contacts 8 and 9.
  • the connection elements 6 and 7 each have extensions 10 and 11, which contain legs 10a and 11a, which extend along the longitudinal axis of the coil former 1 within the support region 2.
  • Sections of the connecting elements 6 and 7 which extend in the direction of the longitudinal axis of the coil former 1 and at least partially protrude therefrom are designed as contacting tabs 12 and 13.
  • the ends of the legs 10a and 11a face each other to form a gap 16a.
  • the extensions 10 and 11 or the legs 10a and 11a of the connecting elements 6 and 7 extend through the entire supporting area 2 of the coil former 1, except for the area of the gap 16a formed for their mutual insulation, and thus increase its mechanical strength. If the extensions 10 and 11 contain further legs 10b, 11b, which are not visible in FIG. 2 and extend through the supporting area and thus further solidify the coil former, then these should of course also be suitably insulated from one another.
  • Fig. 3 is an extension of the section of Fig. 2 of an embodiment of the coil body shown
  • the assembly 17 bridging the gap 16a is arranged essentially within the supporting area 2 of the coil former 1 and connected to the legs 10a and 11a via connecting lugs 17a and 17b.
  • Winding ends 18 and 19 of the coil winding 3 wound on the supporting area 2 are electrically connected to the contacting tabs 12 and 13 of the connection elements 6 and 7 at connection points 20 and 21.
  • the winding end 18 is connected to the connection element 6 at the connection point 20 on the contacting tab 12 and the winding end 19 is connected to the connection element 7 at the connection point 21 on the contacting tab 13.
  • the coil winding 3 can be supplied with electrical energy from an external energy source, not shown.
  • an external energy source not shown.
  • the assembly 17 serves as an insulating mechanical connection of the extensions 10 and 11 or the legs 10a and 11a of the connection elements 6 and 7.
  • the coil current required to excite the coil winding 3 flows via the connection contact 8 of the connection element 6 through the connection element 6 and via the connection point 20 into the winding end 18 of the coil winding 3.
  • connection of the winding ends 18 and 19 of the coil winding 3 with the connection elements 6 and 7 also take place in other places.
  • the coil current flowing through the coil winding 3 generates an electromagnetic field which is used to actuate a relay contact (not shown).
  • the coil current flows over those existing between the second winding end 19 of the coil winding 3 and the contacting tab 13 Connection point 21 and via the connection element 7 or its connection contact 9 back in a suitable manner for energy supply.
  • the assembly 17 contains an additional electrical component between its connecting lugs 17a and 17b, part of the current supplied via the connecting contact 8 of the connecting element 6 does not flow via the connection point 20 into the coil winding 3, but via the extension 10 and / or the leg 10a up to its joint with the connecting lug 17a of the unit 17. Via the electrical additional component contained in the unit 17, this part of the current supplied passes via the connecting lug 17b of the unit 17 to the leg 11a or the extension 11 of the connecting element 7 and on this Paths back via connection contact 9 to the power supply.
  • the additional component contained in the assembly 17 is electrically connected in parallel according to this example of the coil winding 3.
  • the connecting elements 6 and 7 with their extensions 10 and 11 or with their legs 10a and 11a and possibly the assembly 17 (FIG. 3) are extrusion-coated with plastic to produce the coil former.
  • the flanges 4 and 5 are formed perpendicular to the longitudinal axis of the coil former 1 and in the course of the connecting contacts 8 and 9 of the connecting elements 6 and 7 formed at right angles to its longitudinal axis; the support area 2 essentially arises in the area of the extensions 10 and 11 or the legs 10a and 11a and, if appropriate, in the area of the structural unit 17 (FIG. 3).
  • the connection elements 6 and 7 together with their connection 25 form a manufacturing part 26, which is part of the band in a band production.
  • the extensions 10 and 11 have parallel to the legs 10a and 11a extending legs 10b and 11b.
  • a space 30 is present between the legs 10a and 10b or 11a and 11b.
  • the legs 11a and 11b of the extension 11 are connected to one another according to FIG. 4 to further increase the mechanical rigidity by means of a cross connection 11c.
  • the structural unit 17 is arranged to bridge gaps 16a and 16b, the intermediate space 30 and the structural unit 17 being dimensioned such that the structural unit 17 is introduced into the intermediate space 30.
  • Fig. 5 shows a further exemplary embodiment of a manufacturing part 36, which contains the connecting elements 6 and 7, the leg 10b of the extension 10 and the leg 11a of the extension 11 are short, so that the formed between the ends of the legs 10a and 11a Gap 16a close to the connection element 7 and the gap 16b formed between the ends of the legs 10b and 11b is close to the connection element 6.
  • the mechanical weak points caused by the gaps 16a and 16b are thus relocated to non-critical areas near the flanges 4 and 5 of the bobbin, not shown in FIG.
  • the legs 10a and 11b run essentially parallel to one another, forming an intermediate space 30.
  • the assembly 17 is bridging the intermediate space 30 with its connecting lugs 17a and 17b to the leg 10a in an electrically conductive manner.
  • the intermediate space 30 formed between the legs 10a and 11b and the structural unit 17 are dimensioned such that the structural unit 17 is at least partially introduced into the intermediate space 30.
  • Another terminal lug 17c is electrically conductively connected to leg 11b.
  • a diode 31 symbolically shown in FIG. 5 is arranged between the connecting lugs 17b and 17c within the structural unit 17. With regard to the performance of the diodes that can be used, it may be necessary to connect a further diode 32 in parallel with the diode 31.
  • the connection elements 6 and 7 can be in one Operation, for example by stamping from a sheet metal.
  • connection 35 together with the connection 35, they form the production part 36.
  • This connection can be punched out simultaneously with the connection elements 6 and 7 from the same sheet. According to the arrangement of the assembly 17 shown in FIG. 5, it is possible first to apply the assembly 17 and then to produce the gaps 16a and 16b.
  • a coil former 1 consists of two coil former parts 1a and 1b which are connected to one another essentially in an axial plane.
  • the coil body part 1a contains a support area part 2a for the coil winding, not shown in FIG. 6, which is delimited by the flange parts 4a and 5a contained in the coil body part 1a.
  • the coil body part 1b contains a supplementary support area part 2b, which together with the support area part 2a forms the support area 2, and additional flange parts 4b and 5b of the flanges 4 and 5.
  • the connection elements 6 and 7, the connection contacts 8, are introduced into the coil body part 1a and 9 and extensions 10 and 11 included. As already shown in FIGS.
  • the extensions 10 and 11 are designed, inter alia, as legs 10a and 11a.
  • the assembly 17 is arranged close to the flange 5 and bridges the gap 16a formed between the legs 10a and 11a.
  • the coil body parts 1a and 1b are each designed in the shape of a half shell to form the axial cavity 22; they are also provided with interlocking webs 40 or grooves 41, whereby the cavity 22 is closed when the coil former parts 1a and 1b are joined together.
  • the coil body part 1b contains a contact element 42 which tapers towards one end towards a connection contact 43.
  • the contact element 42 which is at least partially cast into the coil body part 1b, contains at least one pole plate 44. This pole plate 44 interacts with an armature, not shown in FIG. 6, which can be introduced into the axial cavity 22.
  • the gap 16a bridged by the additional component 17 is arranged opposite the pole plate in a plane running parallel to the plane of the pole plate. This compensates for the mechanical weak point caused by the gap 16a.
  • FIG. 7 shows a further production part 50, which consists of a contact element 42 and a connection 51.
  • the contact element 42 which has at least one pole plate 44, is fastened with its connection contact 43 to the connection 51 and can thus be easily fed, handled and positioned during the manufacture of the coil former.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Electromagnets (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

Spool body (101) carrying connecting elements (106, 107) for an electromagnetic relay. Said spool body, while being compact in size, is capable of being submitted to high demands regarding its mechanical resistance. At least one connecting element (107) has a prolongation (111) extending in the direction of the longitudinal axis of the spool body (101) in its supporting part (102) and over most of its length. Said prolongation (111) is at least partially surrounded by the spool body (101) material. If both connecting elements have prolongations, these can be linked by a modular unit in such a way that the connecting elements form a single construction unit. Said modular unit can contain at least one electrical unit, over which the connecting elements are electrically connected and which electrically cooperates with the wire-wound coil (103). Wire-wound coils for electromagnetic relays, in particular small relays.

Description

Die Erfindung bezieht sich auf einen Spulenkörper für ein elektromagnetisches Relais, mit einem Tragbereich für eine Spulenwicklung und mit Anschlußelementen, die jeweils einen mit den Wicklungsenden der Spulenwicklung verbindbaren Abschnitt und einen als Anschlußkontakt ausgebildeten weiteren Abschnitt aufweisen, wobei mindestens ein Anschlußelement einen Fortsatz aufweist, der in Richtung der Spulenachse angeordnet und im Tragbereich des Spulenkörpers eingebettet ist, und auf ein Verfahren zur Herstellung eines Spulenkörpersgemäß dem Oberbegriff des Anspruchs 11.The invention relates to a coil body for an electromagnetic relay, with a supporting area for a coil winding and with connection elements, each of which has a section which can be connected to the winding ends of the coil winding and a further section which is designed as a connection contact, at least one connection element having an extension which arranged in the direction of the coil axis and embedded in the supporting area of the coil body, and to a method for producing a coil body according to the preamble of claim 11.

Ein Spulenkörper der eingangs genannten Art ist bereits aus der US-A-3,445,797 bekannt. Dort sind Anschlußelemente gemeinsam in einen der Spulenflansche eingebettet. Außerdem ist ein Fortsatz eines der Anschlußelemente teilweise in der Wand des Spulenrohres eingebettet, jedoch nur über einen sehr geringen Teil der axialen Länge. Durch die Einbettung wird dieser Fortsatz auch nur zu einem Teil überdeckt, da er zur Kontaktierung des Wicklungsanfangs dient und somit zur Wicklung hin zumindest eine blanke, von dem Kunststoffmaterial nicht überdeckte Oberfläche aufweisen muß.A bobbin of the type mentioned is already known from US-A-3,445,797. There, connection elements are jointly embedded in one of the coil flanges. In addition, an extension of one of the connection elements is partially embedded in the wall of the coil tube, but only over a very small part of the axial length. Due to the embedding, this extension is only partially covered, since it serves to contact the start of the winding and thus must have at least one bare surface that is not covered by the plastic material for the winding.

Ein ähnlicher Spulenkörper ist aus der DE-A-33 18 493 bekannt. Dieser bekannte Spulenkörper weist einen Tragbereich für eine Spulenwicklung auf, der von zwei quer zur Längsachse des Spulenkörpers angeordneten Flanschen seitlich begrenzt wird. Der Spulenkörper enthält ferner Anschlußelemente, die jeweils einen mit den Wicklungsenden der Spulenwicklung verbindbaren Abschnitt und jeweils einen als Anschlußkontakt ausgebildeten weiteren Abschnitt aufweisen. Ferner weisen die Anschlußelemente jeweils einen Fortsatz auf, der außerhalb der Spulenwicklung teilweise in Richtung der Längsachse des Spulenkörpers verläuft und mit seinem Endbereich in den jeweiligen Flansch eingebettet ist. In diesem Spulenkörper ist ein flacher Kern eingebettet, durch den der Spulenkörper auch im Tragbereich eine verhältnismäßig hohe mechanische Festigkeit erhält.A similar coil former is known from DE-A-33 18 493. This known bobbin has a support area for a coil winding, which is laterally delimited by two flanges arranged transversely to the longitudinal axis of the bobbin. The coil former also contains connection elements, each of which has a section that can be connected to the winding ends of the coil winding and each has a further section designed as a connection contact. Furthermore, the connection elements each have an extension, which extends outside the coil winding partially in the direction of the longitudinal axis of the coil body and is embedded with its end region in the respective flange. A flat core is embedded in this coil former, through which the coil former also obtains a relatively high mechanical strength in the supporting area.

In der DE-A-1 464 310 ist weiterhin ein Spulenkörper mit drahtförmigen Anschlußkontakten beschrieben, bei dem diese Anschlußkontakte in Nuten des Spulenkörpers nachträglich eingelegt werden. Diese Drähte haben lediglich den Zweck, den Spulenstrom von der Anschlußseite an einem Spulenflansch zum Wicklungsende am anderen Spulenflansch zu leiten. Da diese Anschlußdrähte lose in offenen Nuten liegen, können sie zur Stabilisierung des Spulenkörpers nichts beitragen. Um eine Axialverschiebung dieser lose eingelegten Drähte zu vermeiden, müssen sie durch zusätzliche Maßnahmen, wie durch Abkröpfen oder durch Verkleben, gesichert werden.DE-A-1 464 310 also describes a coil former with wire-shaped connection contacts, in which these connection contacts are subsequently inserted into grooves in the coil former. The only purpose of these wires is to conduct the coil current from the connection side on one coil flange to the winding end on the other coil flange. Since these connecting wires lie loosely in open slots, they cannot contribute to stabilizing the coil body. In order to avoid axial displacement of these loosely inserted wires, they must be secured by additional measures, such as by cropping or by gluing.

Zur Vermeidung der Nachteile bisheriger Spulenkörper ist ein erfindungsgemäß gestalteter Spulenkörper der eingangs genannten Art dadurch gekennzeichnet, daß der Fortsatz des mindestens einen Anschlußelementes den Tragbereich durchzieht bzw. die Fortsätze von mehreren Anschlußelementen gemeinsam den Tragbereich unter Aussparung einer isolierenden Lücke durchziehen und daß zur Versteifung des Tragbereiches der Fortsatz bzw. die Fortsätze durch das Material des Spulenkörpers gegenüber der Wicklung vollständig abgeschlossen ist bzw. sind.In order to avoid the disadvantages of previous bobbins, a bobbin of the type mentioned at the outset is characterized in that the extension of the at least one connecting element runs through the supporting area or the extensions of several connecting elements pull the supporting area together, with the exception of an insulating gap, and in order to stiffen the supporting area the extension or the extensions are or are completely closed off from the winding by the material of the coil former.

Durch die erfindungsgemäße Gestaltung erhält der Spulenkörper eine hohe mechanische Festigkeit und trägt damit zur Verbesserung der mechanischen Eigenschaften eines Relais mit einem derartigen Spulenkörper bei. Damit wird in vorteilhafter Weise der Raumbedarf des Spulenkörpers und des gesamten Relais ohne Einbuße der mechanischen Festigkeit wesentlich vermindert. In fertigungstechnischer Hinsicht ist der erfindungsgemäße Spulenkörper von Vorteil, weil ohne ein zusätzliches Konstruktionselement allein durch die Verwendung eines Anschlußelementes mit einem entsprechend ausgebildeten und angeordneten Fortsatz seine Stabilität und seine mechanische Festigkeit erhöht werden. Die erfindungsgemäße Ausgestaltung des Spulenkörpers ist besonders vorteilhaft, wenn dieser einen oder mehrere Hohlräume aufweist und/oder mehrteilig ausgeführt ist.The design according to the invention gives the coil body a high mechanical strength and thus contributes to improving the mechanical properties of a relay with such a coil body. In this way, the space requirement of the coil body and of the entire relay is advantageously significantly reduced without a loss of mechanical strength. In terms of production technology, the coil former according to the invention is advantageous because without an additional structural element, its stability and mechanical strength can be increased simply by using a connecting element with a correspondingly designed and arranged extension. The embodiment of the coil former according to the invention is particularly advantageous if it has one or more cavities and / or is made in several parts.

Die Anschlußelemente können derart ausgebildet sein, daß sie mit ihren Fortsätzen beispielsweise eine U-förmige, Z-förmige oder aber eine im wesentlichen in Längsachse des Spulenkörpers verlaufende gestreckte Gestalt aufweisen.The connection elements can be designed in such a way that their extensions have, for example, a U-shaped, Z-shaped or an elongated shape which extends essentially in the longitudinal axis of the coil body.

Eine vorteilhafte Weiterbildung der Erfindung sieht vor, daß jeder Fortsatz einen oder mehrere, in Längsrichtung des Tragbereiches verlaufende Schenkel aufweist. Diese Ausgestaltung ist insbesondere in fertigungstechnischer Hinsicht vorteilhaft. Für eine weitere Steigerung der Festigkeit des Spulenkörpers ist es vorteilhaft, daß die Schenkel von zwei Fortsätzen einander zumindest teilweise überlappend im Tragbereich parallel nebeneinander verlaufen.An advantageous development of the invention provides that each extension has one or more legs running in the longitudinal direction of the support area. This configuration is particularly advantageous in terms of production technology. For a further increase in the strength of the coil former, it is advantageous that the legs of two projections run parallel to one another, at least partially overlapping one another, in the supporting region.

Eine weitere vorteilhafte Ausgestaltung des erfindungsgemäßen Spulenkörpers sieht vor, daß der eine Fortsatz mindestens zwei parallel zueinander verlaufende Schenkel unterschiedlicher Längen aufweist und daß der andere Fortsatz die gleiche Anzahl parallel zueinander verlaufender Schenkel entsprechender Längen aufweist, so daß zwischen den gegeneinander gerichteten Enden der Schenkel Lücken gebildet werden, die in verschiedenen zur Längsachse des Spulenkörpers senkrechten Ebenen liegen. Durch diese Ausgestaltung können die infolge der der gegenseitigen Isolierung der Anschlußelemente dienenden Lücken zwischen den Enden der Schenkel auftretenden mechanischen Schwachstellen in verschiedene Bereiche des Spulenkörpers verlegt werden und damit die mechanischen Eigenschaften des Spulenkörpers günstig beeinflußt werden.Another advantageous embodiment of the bobbin according to the invention provides that the one extension has at least two parallel legs of different lengths and that the other extension has the same number of parallel legs of corresponding lengths, so that gaps are formed between the opposing ends of the legs be in different planes perpendicular to the longitudinal axis of the coil body. As a result of this configuration, the mechanical weak points which occur as a result of the gaps serving to mutually isolate the connecting elements between the ends of the legs can be relocated to different regions of the coil former and thus the mechanical properties of the coil former can be influenced favorably.

Eine weitere vorteilhafte Ausgestaltung des erfindungsgemäßen Spulenkörpers besteht darin, daß die Schenkel der Fortsätze über mindestens eine zumindest teilweise innerhalb des Tragbereichs des Spulenkörpers liegende Baueinheit miteinander verbunden sind. Bei diesem Spulenkörper bilden die Anschlußelemente dadurch, daß ihre Fortsätze über die mindestens eine Baueinheit miteinander verbunden sind, in fertigungstechnischer Hinsicht eine Einheit, die einfach zu handhaben ist. Die Baueinheit kann als reines mechanisches Verbindungselement der Fortsätze ausgeführt sein und die Fortsätze voneinander elektrisch isoliert verbinden.A further advantageous embodiment of the bobbin according to the invention is that the legs of the extensions are connected to one another via at least one structural unit which is at least partially located within the supporting region of the bobbin. In this coil former, the connection elements form in that their extensions are connected to one another via the at least one structural unit, in terms of production technology a unit that is easy to use. The structural unit can be designed as a purely mechanical connecting element of the extensions and connect the extensions electrically insulated from one another.

Die Fortsätze der Anschlußelemente können auch so in dem Tragbereich des Spulenkörpers verlaufen, daß sie sich nicht berühren und somit isoliert voneinander sind. Es ist grundsätzlich auch möglich, daß die Anschlußelemente über einen langgestreckten Nichtleiter verbunden werden und daß der Nichtleiter im Bereich des Tragbereichs des Spulenkörpers liegt und somit im Prinzip die zu einer stofflichen Einheit zusammengefaßten Fortsätze der Anschlußelemente bildet.The extensions of the connection elements can also run in the supporting area of the coil body in such a way that they do not touch and are therefore isolated from one another. In principle, it is also possible for the connecting elements to be connected via an elongated non-conductor and for the non-conductor to lie in the region of the support area of the coil former and thus in principle to form the extensions of the connecting elements which are combined to form a material unit.

Grundsätzlich ist auch denkbar, die Fortsätze der Anschlußelemente sich überlappend oder stumpf aneinanderstoßend auszuführen und zu verbinden und einen direkten elektrischen Kontakt durch geeignete Isolierungsmaßnahmen, beispielsweise durch Zwischenlegen einer Isolationsfolie, zu vermeiden. In wirtschaftlicher Hinsicht ist es günstig, die Anschlußelemente mit ihren Fortsätzen aus einem Blech, beispielsweise durch Stanzen, herzustellen und ihre gegenseitige Isolierung, wie bereits erwähnt, durch Lücken zwischen den Enden ihrer Schenkel sicherzustellen.In principle, it is also conceivable for the extensions of the connection elements to overlap or to abut one another to carry out and to connect and to avoid direct electrical contact by suitable insulation measures, for example by interposing an insulation film. From an economic point of view, it is expedient to produce the connecting elements with their extensions from sheet metal, for example by stamping, and to ensure their mutual insulation, as already mentioned, by gaps between the ends of their legs.

Es ist aus der EP 01 73 353 A2 bekannt, ein elektrisches Zusatzbauteil zumindest teilweise in einen Gußfortsatz eines Spulenkörpers einzugießen, das den ebenfalls in den Gußfortsatz eingegossenen mittleren Bereich eines Anschlußelementes mit dem ebenfalls in den Gußfortsatz eingegossenen einen Ende eines Kontaktstifts verbindet. Der Gußfortsatz schließt sich an die äußere, dem Tragbereich des Spulenkörpers abgewandte Seite eines Flansches an, so daß sich das elektrische Zusatzbauteil und das Anschlußelement vollständig außerhalb des Tragbereichs und außerhalb der Flanschebene des Spulenkörpers befinden. Der Raumbedarf des Spulenkörpers erhöht sich dadurch. Wird das eine Ende der Spulenwicklung an das andere, aus dem Gußfortsatz nach oben herausragende Ende des Kontaktstifts elektrisch angeschlossen, erfolgt die Zuführung des Spulenstroms über das Anschlußelement und das zwischen Anschlußelement und Kontaktstift befindliche Zusatzbauteil.It is known from EP 01 73 353 A2 to at least partially cast an additional electrical component into a casting extension of a coil former, which connects the central region of a connecting element which is also cast into the casting extension and the one end of a contact pin which is also cast into the casting extension. The cast extension adjoins the outer side of a flange facing away from the support area of the coil body, so that the additional electrical component and the connecting element are located completely outside the support area and outside the flange plane of the coil body. This increases the space requirement of the coil former. If one end of the coil winding is electrically connected to the other end of the contact pin projecting upward from the casting extension, the coil current is supplied via the connecting element and the additional component located between the connecting element and the contact pin.

Eine weitere vorteilhafte Ausgestaltung des erfindungsgemäßen Spulenkörpers sieht vor, daß die Baueinheit aus mindestens einem elektrischen Zusatzbauteil besteht und daß die Schenkel der Fortsätze über das elektrische Zusatzbauteil elektrisch miteinander verbunden sind. Auf diese Weise können ein oder mehrere elektrische Zusatzbauteile, beispielsweise Dioden oder Widerstände, in gewünschter schaltungstechnischer Anordnung miteinander bzw. mit den Anschlußelementen zur Beschaltung der Spulenwicklung verbunden werden. Dazu ist es u. U. erforderlich, daß die Schenkel weitere voneinander isolierte Bereiche aufweisen. Hierbei wird der Raumbedarf des Spulenkörpers trotz zusätzlicher elektrischer Zusatzbauteile nicht wesentlich erhöht und zudem das mechanische Verhalten des Spulenkörpers positiv beeinflußt. Im einfachsten Fall kann die Baueinheit ausschließlich aus einem elektrischen Zusatzbauteil bestehen. Es ist aber auch denkbar, ein einheitliches Gehäuse zu verwenden, in das beliebige elektrische Zusatzbauteile eingebracht sind. Aus diesem Gehäuse können dann vorteilhaft gestaltete Kontaktierungselemente herausgeführt werden. Eine derartige Vereinheitlichung der verwendeten Baueinheiten erleichtert eine Automatisierung der Fertigung, weil Baueinheiten, die verschiedene Funktionen ausüben, mit denselben Zuführungs- und Handhabungseinrichtungen verarbeitet werden können. Soll die Baueinheit, wie bereits erwähnt, lediglich isolierende Funktion ausüben, ist es bei Verwendung desselben Gehäuses, dessen Kontaktierungselemente in keiner Weise miteinander verbunden sind, möglich, auch diese Baueinheit mit derselben Zuführungseinrichtung dem Fertigungsprozeß zuzuführen bzw. mit denselben Handhabungsgeräten zu handhaben.A further advantageous embodiment of the coil former according to the invention provides that the structural unit consists of at least one additional electrical component and that the legs of the extensions are electrically connected to one another via the additional electrical component. In this way, one or more additional electrical components, for example diodes or resistors, can be connected to one another or to the connection elements for connecting the coil winding in the desired circuit arrangement. It is u. U. required that the legs more areas isolated from each other exhibit. Here, the space requirement of the coil body is not significantly increased despite additional electrical components and also has a positive influence on the mechanical behavior of the coil body. In the simplest case, the assembly can consist exclusively of an additional electrical component. However, it is also conceivable to use a uniform housing in which any additional electrical components are introduced. Advantageously designed contacting elements can then be led out of this housing. Such a standardization of the structural units used facilitates automation of production, since structural units that perform different functions can be processed with the same feed and handling devices. If, as already mentioned, the assembly is only to perform an insulating function, it is possible, when using the same housing, the contacting elements of which are in no way connected to one another, to also feed this assembly to the manufacturing process with the same feed device or to handle it with the same handling devices.

Eine weitere vorteilhafte Ausführung des erfindungsgemäßen Spulenkörpers sieht vor, daß die mindestens eine Baueinheit mindestens eine Lücke zwischen den Enden der Schenkel der Fortsätze überbrückend angeordnet ist. Durch diese Anordnung der mindestens einen Baueinheit wird die durch die Lücke hervorgerufene mechanische Schwachstelle zumindest teilweise kompensiert.A further advantageous embodiment of the coil former according to the invention provides that the at least one structural unit is arranged to bridge at least one gap between the ends of the legs of the extensions. This arrangement of the at least one structural unit at least partially compensates for the mechanical weak point caused by the gap.

Eine in fertigungstechnischer Hinsicht vorteilhafte Ausgestaltung des Spulenkörpers besteht darin, daß die mindestens eine Baueinheit mindestens einen zwischen den parallel verlaufenden Schenkeln verschiedener Fortsätze gebildeten Zwischenraum überbrückend angeordnet ist. Dabei bildet die aus den Anschlußelementen mit ihren Fortsätzen und der Baueinheit gebildete Fertigungseinheit stets eine bauliche Einheit, wenn die Lücken zwischen den Enden der Schenkel erst hergestellt werden, nachdem die Baueinheit den zwischen den parallel verlaufenden Schenkeln verschiedener Fortsätze gebildeten Zwischenraum überbrückend aufgebracht worden ist.An embodiment of the coil body which is advantageous in terms of production technology is that the at least one structural unit is arranged to bridge at least one intermediate space formed between the parallel legs of different extensions. The manufacturing unit formed from the connection elements with their extensions and the structural unit always forms a structural unit if the gaps between the ends of the legs are only produced after the structural unit has the between parallel legs of different extensions formed gap has been applied bridging.

Hinsichtlich des Raumbedarfs des erfindungsgemäßen Spulenkörpers ist es besonders vorteilhaft, daß der zwischen den Schenkeln der Fortsätze gebildetete Zwischenraum und die Baueinheit so bemessen sind, daß die Baueinheit zumindest teilweise in den Zwischenraum eingebracht werden kann.With regard to the space requirement of the coil former according to the invention, it is particularly advantageous that the intermediate space formed between the legs of the extensions and the structural unit are dimensioned such that the structural unit can be at least partially inserted into the intermediate space.

Eine weitere vorteilhafte Ausgestaltung des erfindungsgemäßen Spulenkörpers sieht vor, daß bei einem Spulenkörper mit einem Hohlraum in Richtung seiner Längsachse im Bereich des Hohlraums mindestens ein Polblech mindestens eines Kontaktelementes angeordnet ist und daß das Kontaktelement zumindest teilweise von dem Material des Spulenkörpers umgeben ist, wodurch eine zusätzliche Erhöhung der mechanischen Festigkeit des Spulenkörpers erreicht wird.A further advantageous embodiment of the bobbin according to the invention provides that in the case of a bobbin with a cavity in the direction of its longitudinal axis, at least one pole plate of at least one contact element is arranged in the region of the cavity, and that the contact element is at least partially surrounded by the material of the coil body, so that an additional Increasing the mechanical strength of the coil body is achieved.

Besonders vorteilhaft ist es, den erfindungsgemäßen Spulenkörper so auszubilden, daß das mindestens eine Polblech des mindestens einen Kontaktelementes in einer zu den Schenkeln parallelen Ebene so angeordnet ist, daß es im Bereich mindestens einer der zwischen den Enden der Schenkel gebildeten Lücke liegt. Damit wird die durch die Lücke zwischen den Enden der Schenkel hervorgerufene mechanische Schwachstelle des Spulenkörpers zumindest teilweise kompensiert. Es ist besonders günstig, wenn der die mechanische Festigkeit beeinträchtigende Einfluß aller Lücken auf diese Weise kompensiert werden kann. Dazu ist es erforderlich, daß die Lücken so angeordnet sind, daß sie alle in einem Bereich liegen, der dem in einer parallel zu den Schenkeln verlaufenden Ebene angeordneten Polblech gegenüberliegt. Die mechanische Festigkeit des erfindungsgemäßen Spulenkörpers wird bei entsprechender Anordnung der Lücken weiter erhöht, wenn mehr als ein Polblech verwendet wird. In herstellungstechnischer Hinsicht ist es besonders vorteilhaft, daß bei einem zweiteilig ausgeführten Spulenkörper in dem einen Spulenkörperteil die Anschlußelemente und in dem anderen Spulenkörperteil das mindestens eine Kontaktelement enthalten sind.It is particularly advantageous to design the coil former according to the invention such that the at least one pole plate of the at least one contact element is arranged in a plane parallel to the legs in such a way that it lies in the region of at least one of the gap formed between the ends of the legs. This at least partially compensates for the mechanical weak point of the coil former caused by the gap between the ends of the legs. It is particularly advantageous if the influence of all the gaps, which affects the mechanical strength, can be compensated in this way. For this it is necessary that the gaps are arranged in such a way that they all lie in an area which lies opposite the pole plate arranged in a plane running parallel to the legs. The mechanical strength of the coil former according to the invention is further increased with a corresponding arrangement of the gaps if more than one pole plate is used. From a manufacturing point of view, it is particularly advantageous that in the case of a two-part coil former the connection elements are contained in one coil former part and the at least one contact element is contained in the other coil former part.

Ein Verfahren zur Herstellung des erfindungsgemäßen Spulenkörpers sieht vor, daß ein Fertigungsteil verwendet wird, das die jeweils einen Fortsatz aufweisenden Anschlußelemente für mindestens einen Spulenkörper enthält, und daß das Fertigungsteil derart mit Kunststoff umspritzt wird, daß der Tragbereich im Bereich der Fortsätze entsteht. In fertigungstechnischer Hinsicht ist die Verwendung eines derart gestalteten Fertigungsteils vorteilhaft, weil es leicht zu handhaben und einfach und sicher in der Gußform zur Herstellung des Spulenkörpers zu positionieren und zu fixieren ist.A method for producing the bobbin according to the invention provides that a manufacturing part is used which contains the connection elements for at least one bobbin each having an extension, and that the manufacturing part is extrusion-coated with plastic in such a way that the supporting area is formed in the region of the extensions. In terms of production technology, the use of a production part designed in this way is advantageous because it is easy to handle and can be easily and securely positioned and fixed in the casting mold for producing the coil former.

Eine vorteilhafte Fortbildung des erfindungsgemäßen Verfahrens zur Herstellung eines Spulenkörpers mit mindestens einem Kontaktelement sieht vor, daß ein weiteres Fertigungsteil verwendet wird, das das mindestens eine Kontaktelement enthält, und daß das weitere Fertigungsteil gemeinsam mit dem ersten Fertigungsteil derart mit Kunststoff umspritzt wird, daß das mindestens eine Polblech des mindestens einen Kontaktelements im Bereich des Tragbereichs liegt. Auch hier ist die Verwendung eines Fertigungsteils vorteilhaft, weil damit eine leichte Handhabung und genaue Fixierung des mindestens einen Kontaktelementes in der Gußform möglich ist.An advantageous development of the method according to the invention for producing a coil former with at least one contact element provides that a further production part is used which contains the at least one contact element, and that the further production part is extrusion-coated with plastic in such a way that the at least one a pole plate of the at least one contact element lies in the area of the support area. Here, too, the use of a production part is advantageous because it enables easy handling and precise fixing of the at least one contact element in the casting mold.

Zur Herstellung eines zweiteilig ausgeführten Spulenkörpers, dessen eines Spulenkörperteil die Anschlußelemente und dessen anderes Spulenkörperteil das mindestens eine Kontaktelement enthält, ist gemäß einer weiteren vorteilhaften Fortbildung des erfindungsgemäßen Verfahrens vorgesehen, daß ein Fertigungsteil verwendet wird, das die Anschlußelemente für mindestens einen Spulenkörper enthält, daß das Fertigungsteil derart mit Kunststoff umspritzt wird, daß der Tragbereichsteil des einen Spulenkörperteils des Spulenkörpers im Bereich der Fortsätze entsteht, daß ein weiteres Fertigungsteil verwendet wird, das mindestens ein Kontaktelement enthält, daß das weitere Fertigungsteil derart mit Kunststoff umspritzt wird, daß ein ergänzendes Spulenkörperteil des Spulenkörpers entsteht, wobei der Tragbereichsteil des ergänzenden Spulenkörperteils im Bereich des mindestens einen Kontaktelements entsteht, und daß die beiden Spulenkörperteile zum Spulenkörper zusammengefügt werden.For the manufacture of a two-part coil body, one part of the coil body contains the connection elements and the other part of the coil body contains the at least one contact element, according to a further advantageous development of the method according to the invention it is provided that a production part is used which contains the connection elements for at least one coil body that the Manufacturing part is overmolded with plastic in such a way that the supporting area part of one coil body part of the coil body in the area of the extensions arises that a further manufacturing part is used which contains at least one contact element, that the further manufacturing part is overmolded with plastic in such a way that a supplementary coil former part of the coil former is formed, the supporting region part of the supplementary coil former part being formed in the region of the at least one contact element, and that the two coil former parts are joined together to form the coil former.

Gemäß einer weiteren vorteilhaften Fortbildung des erfindungsgemäßen Verfahrens wird ein Fertigungsteil mit Lücken zwischen den Fortsätzen der Anschlußelemente verwendet wird und vor dem Umspritzen mit Kunststoff die mindestens eine Baueinheit mit den Fortsätzen beider Anschlußelemente verbunden. Bei dieser Ausgestaltung des erfindungsgemäßen Verfahrens können die Lücken gleichzeitig mit der Fertigung der Anschlußelemente hergestellt werden; dies ist insbesondere dann vorteilhaft, wenn die Baueinheit so angeordnet wird, daß von ihr mindestens eine der Lücken überbrückt wird.According to a further advantageous development of the method according to the invention, a production part with gaps between the extensions of the connection elements is used and the at least one structural unit is connected to the extensions of both connection elements before the encapsulation with plastic. In this embodiment of the method according to the invention, the gaps can be created simultaneously with the manufacture of the connection elements; this is particularly advantageous if the assembly is arranged so that it bridges at least one of the gaps.

Eine weitere vorteilhafte Fortbildung des erfindungsgemäßen Verfahrens sieht vor, daß ein Fertigungsteil mit an den Fortsätzen miteinander verbundenen Anschlußelementen verwendet wird, daß die Baueinheit mit den Fortsätzen beider Anschlußelemente verbunden wird und daß anschließend die zur elektrischen Isolierung der Anschlußelemente notwendigen Lücken hergestellt werden, bevor das Umspritzen mit Kunststoff erfolgt. Dies ist in fertigungstechnischer Hinsicht vorteilhaft, weil durch das Aufbringen der Baueinheit zunächst eine zusätzliche mechanische Verbindung der Fortsätze der beiden Anschlußelemente hergestellt wird, bevor die zunächst noch miteinander verbundenen Fortsätze durch Herstellung der Lücken voneinander getrennt werden. Hierbei bilden die Anschlußelemente mit ihren Fortsätzen und die aufgebrachte Baueinheit stets eine bauliche Einheit, die während des Fertigungsprozesses vorteilhaft zu handhaben ist.A further advantageous development of the method according to the invention provides that a production part with connecting elements connected to one another on the extensions is used, that the structural unit is connected to the extensions of both connecting elements and that the gaps necessary for the electrical insulation of the connecting elements are subsequently produced before the encapsulation done with plastic. This is advantageous from a manufacturing point of view, because the application of the structural unit first creates an additional mechanical connection of the extensions of the two connection elements before the extensions, which are still connected to one another, are separated from one another by producing the gaps. Here, the connection elements with their extensions and the applied structural unit always form a structural unit which can be handled advantageously during the production process.

Zur Erläuterung der Erfindung ist in

  • Fig. 1 ein Ausschnitt eines Ausführungsbeispiels des erfindungsgemäßen Spulenkörpers in perspektivischer Ansicht dargestellt.
  • Fig. 2 zeigt einen Ausschnitt eines weiteren Ausführungsbeispiels des erfindungsgemäßen Spulenkörpers in perspektivischer Ansicht.
  • Fig. 3 zeigt einen Ausschnitt eines Ausführungsbeispiels des erfindungsgemäßen Spulenkörpers in perspektivischer Ansicht mit im Bereich des Tragbereichs angeordneter Baueinheit.
  • Fig. 4 zeigt ein Ausführungsbeispiel eines Fertigungsteils mit der bereits aufgebrachten Baueinheit.
  • Fig. 5 zeigt eine weitere Anordnungsmöglichkeit der Baueinheit auf dem Fertigungsteil.
  • Fig. 6 zeigt ein Ausführungsbeispiel des erfindungsgemäßen Spulenkörpers in zweiteiliger Ausführung und
  • Fig. 7 zeigt ein Ausführungsbeispiel eines weiteren Fertigungsteils, das ein Kontaktelement enthält.
To explain the invention is in
  • Fig. 1 shows a detail of an embodiment of the bobbin according to the invention in a perspective view.
  • Fig. 2 shows a detail of a further embodiment of the bobbin according to the invention in a perspective view.
  • FIG. 3 shows a detail of an exemplary embodiment of the coil former according to the invention in a perspective view with a structural unit arranged in the region of the support area.
  • Fig. 4 shows an embodiment of a manufacturing part with the assembly already applied.
  • 5 shows a further possibility of arranging the structural unit on the production part.
  • Fig. 6 shows an embodiment of the bobbin according to the invention in two parts and
  • 7 shows an exemplary embodiment of a further production part which contains a contact element.

Fig. 1 zeigt einen Spulenkörper 101 mit einem Tragbereich 102 für eine andeutungsweise dargestellte Spulenwicklung 103. Der Tragbereich 102 wird von seitlichen Flanschen 104 und 105 begrenzt. Rechtwinklig zur Längsachse des Spulenkörpers 101 verlaufende Anschlußelemente 106 und 107 sind in den Spulenkörper 101 im Bereich seiner Flansche 104 und 105 eingebettet und weisen jeweils einen als Anschlußkontakt 108 und 109 ausgebildeten Abschnitt und jeweils einen mit den Wicklungsenden der Spulenwicklung 103 verbindbaren Abschnitt auf. In der Fig. 1 ist nur der mit der Spulenwicklung 103 verbindbare, als Kontaktierungslappen 113 ausgebildete Abschnitt des Anschlußelementes 107 dargestellt. Das Anschlußelement 107 weist einen Fortsatz 111 auf, der sich in Richtung der Längsachse des Spulenkörpers 101 in den Tragbereich 102 des Spulenkörpers 101 hinein erstreckt und diesen bis in den Bereich des Flansches 104 durchzieht. Der Fortsatz 111 ist in das Material des Spulenkörpers 101 im Tragbereich 102 eingebettet. Das Anschlußelement 106 ist in seiner Länge so ausgeführt, daß ein elektrischer Kontakt des Anschlußelementes 106 mit dem Anschlußelement 107 über den Fortsatz 111 vermieden ist. Der in dem Tragbereich 102 eingebettete Fortsatz 111 verleiht dem Spulenkörper 101 eine hohe mechanische Festigkeit bei relativ geringer Wandstärke im Bereich des Tragbereichs 102.1 shows a coil former 101 with a support area 102 for a coil winding 103, which is indicated as an indication. The support area 102 is delimited by lateral flanges 104 and 105. Connection elements 106 and 107 extending at right angles to the longitudinal axis of the coil former 101 are embedded in the coil former 101 in the region of its flanges 104 and 105 and each have a section designed as a connection contact 108 and 109 and a section connectable to the winding ends of the coil winding 103. 1 shows only the section of the connection element 107 which can be connected to the coil winding 103 and is designed as a contacting tab 113. The connection element 107 has an extension 111, which extends in the direction of the longitudinal axis of the coil former 101 into the support region 102 of the coil former 101 and extends through this into the region of the flange 104. The extension 111 is embedded in the material of the bobbin 101 in the support area 102. The connector 106 is designed in its length so that electrical contact of the connection element 106 with the connection element 107 via the extension 111 is avoided. The extension 111 embedded in the support area 102 gives the coil body 101 high mechanical strength with a relatively small wall thickness in the area of the support area 102.

Nach Fig. 2 enthält ein Spulenkörper 1 einen Tragbereich 2 für eine Spulenwicklung 3. Der Tragbereich 2 wird durch zwei seitliche, in zur Längsachse des Spulenkörpers 1 senkrechten Ebenen angeordnete Flansche 4 und 5 begrenzt. Anschlußelemente 6 und 7, die in dem gezeigten Ausführungsbeispiel rechtwinklig zur Längsachse des Spulenkörpers 1 von diesem wegführen, verjüngen sich zu Abschnitten hin, die als Anschlußkontakte 8 und 9 ausgebildet sind. Die Anschlußelemente 6 und 7 weisen jeweils Fortsätze 10 und 11 auf, die Schenkel 10a und 11a enthalten, die sich entlang der Längsachse des Spulenkörpers 1 innerhalb des Tragbereichs 2 erstrecken. In Richtung der Längsachse des Spulenkörpers 1 verlaufende und aus diesem zumindest teilweise herausragende Abschnitte der Anschlußelemente 6 und 7 sind als Kontaktierungslappen 12 und 13 ausgebildet. Die Enden der Schenkel 10a und 11a liegen einander unter Bildung einer Lücke 16a gegenüber.According to FIG. 2, a bobbin 1 contains a support area 2 for a coil winding 3. The support area 2 is delimited by two lateral flanges 4 and 5 arranged in planes perpendicular to the longitudinal axis of the bobbin 1. Connection elements 6 and 7, which lead away from the coil former 1 at right angles to the longitudinal axis of the coil former 1 in the exemplary embodiment shown, taper towards sections which are designed as connection contacts 8 and 9. The connection elements 6 and 7 each have extensions 10 and 11, which contain legs 10a and 11a, which extend along the longitudinal axis of the coil former 1 within the support region 2. Sections of the connecting elements 6 and 7 which extend in the direction of the longitudinal axis of the coil former 1 and at least partially protrude therefrom are designed as contacting tabs 12 and 13. The ends of the legs 10a and 11a face each other to form a gap 16a.

Die Fortsätze 10 und 11 bzw. die Schenkel 10a und 11a der Anschlußelemente 6 und 7 durchziehen bis auf den Bereich der zu ihrer gegenseitigen Isolierung gebildeten Lücke 16a den gesamten Tragbereich 2 des Spulenkörpers 1 und erhöhen damit dessen mechanische Festigkeit. Enthalten die Fortsätze 10 und 11 weitere, in Fig. 2 nicht sichtbare, den Tragbereich durchziehende und den Spulenkörper damit weiter verfestigende Schenkel 10b, 11b, so sind selbstverständlich auch diese in geeigneter Weise voneinander zu isolieren.The extensions 10 and 11 or the legs 10a and 11a of the connecting elements 6 and 7 extend through the entire supporting area 2 of the coil former 1, except for the area of the gap 16a formed for their mutual insulation, and thus increase its mechanical strength. If the extensions 10 and 11 contain further legs 10b, 11b, which are not visible in FIG. 2 and extend through the supporting area and thus further solidify the coil former, then these should of course also be suitably insulated from one another.

In Fig. 3 ist in Erweiterung des in Fig. 2 dargestellten Ausschnitts eines Ausführungsbeispiels des Spulenkörpers eine Baueinheit 17 die Lücke 16a überbrückend im wesentlichen innerhalb des Tragbereichs 2 des Spulenkörpers 1 angeordnet und über Anschlußfahnen 17a und 17b mit den Schenkeln 10a und 11a verbunden. Wicklungsenden 18 und 19 der auf den Tragbereich 2 aufgewickelten Spulenwicklung 3 sind mit den Kontaktierungslappen 12 und 13 der Anschlußelemente 6 und 7 an Verbindungspunkten 20 und 21 elektrisch verbunden. Beispielsweise ist das Wicklungsende 18 mit dem Anschlußelement 6 an dem Verbindungspunkt 20 auf dem Kontaktierungslappen 12 und das Wicklungsende 19 mit dem Anschlußelemente 7 an dem Verbindungspunkt 21 auf dem Kontaktierungslappen 13 verbunden. Über den Anschlußkontakt 8 des Anschlußelementes 6 bzw. den Anschlußkontakt 9 des Anschlußelementes 7 kann die Spulenwicklung 3 von einer äußeren, nicht dargestellten Energiequelle mit elektrischer Energie versorgt werden. Innerhalb des Tragbereichs 2 des Spulenkörpers 1 befindet sich ein sich in Richtung der Längsachse des Spulenkörpers 1 erstreckender Hohlraum 22, der beispielsweise einen in Fig. 2 und Fig. 3 nicht dargestellten Anker aufnehmen kann.In Fig. 3 is an extension of the section of Fig. 2 of an embodiment of the coil body shown The assembly 17 bridging the gap 16a is arranged essentially within the supporting area 2 of the coil former 1 and connected to the legs 10a and 11a via connecting lugs 17a and 17b. Winding ends 18 and 19 of the coil winding 3 wound on the supporting area 2 are electrically connected to the contacting tabs 12 and 13 of the connection elements 6 and 7 at connection points 20 and 21. For example, the winding end 18 is connected to the connection element 6 at the connection point 20 on the contacting tab 12 and the winding end 19 is connected to the connection element 7 at the connection point 21 on the contacting tab 13. Via the connection contact 8 of the connection element 6 or the connection contact 9 of the connection element 7, the coil winding 3 can be supplied with electrical energy from an external energy source, not shown. Within the support area 2 of the coil former 1 there is a cavity 22 which extends in the direction of the longitudinal axis of the coil former 1 and which can accommodate, for example, an armature, not shown in FIGS. 2 and 3.

Enthält die Baueinheit 17 keine elektrischen Zusatzbauteile, so dient sie als isolierende mechanische Verbindung der Fortsätze 10 und 11 bzw. der Schenkel 10a und 11a der Anschlußelemente 6 und 7.If the assembly 17 contains no additional electrical components, it serves as an insulating mechanical connection of the extensions 10 and 11 or the legs 10a and 11a of the connection elements 6 and 7.

Der zur Erregung der Spulenwicklung 3 notwendige Spulenstrom fließt über den Anschlußkontakt 8 des Anschlußelementes 6 durch das Anschlußelement 6 und über den Verbindungspunkt 20 in das Wicklungsende 18 der Spulenwicklung 3. Grundsätzlich kann die Verbindung der Wicklungsenden 18 und 19 der Spulenwicklung 3 mit den Anschlußelementen 6 und 7 auch an anderen Stellen erfolgen. Der die Spulenwicklung 3 durchfließende Spulenstrom erzeugt ein elektromagnetisches Feld, das zur Betätigung eines nicht dargestellten Relaiskontakts dient. Der Spulenstrom fließt über die zwischen dem zweiten Wicklungsende 19 der Spulenwicklung 3 und dem Kontaktierungslappen 13 bestehenden Verbindungspunkt 21 und über das Anschlußelement 7 bzw. dessen Anschlußkontakt 9 in geeigneter Weise zur Energieversorgung zurück. Vorausgesetzt, daß die Baueinheit 17 zwischen ihren Anschlußfahnen 17a und 17b ein elektrisches Zusatzbauteil enthält, fließt ein Teil des über den Anschlußkontakt 8 des Anschlußelementes 6 zugeführten Stromes nicht über den Verbindungspunkt 20 in die Spulenwicklung 3, sondern über den Fortsatz 10 und bzw. den Schenkel 10a bis zu dessen Fügestelle mit der Anschlußfahne 17a der Baueinheit 17. Über das in der Baueinheit 17 enthaltende elektrische Zusatzbauteil gelangt dieser Teil des zugeführten Stromes über die Anschlußfahne 17b der Baueinheit 17 auf den Schenkel 11a bzw. den Fortsatz 11 des Anschlußelementes 7 und auf diesem Wege über den Anschlußkontakt 9 zur Energieversorgung zurück. Das in der Baueinheit 17 enthaltende Zusatzbauteil ist nach diesem Beispiel der Spulenwicklung 3 elektrisch parallel geschaltet.The coil current required to excite the coil winding 3 flows via the connection contact 8 of the connection element 6 through the connection element 6 and via the connection point 20 into the winding end 18 of the coil winding 3. In principle, the connection of the winding ends 18 and 19 of the coil winding 3 with the connection elements 6 and 7 also take place in other places. The coil current flowing through the coil winding 3 generates an electromagnetic field which is used to actuate a relay contact (not shown). The coil current flows over those existing between the second winding end 19 of the coil winding 3 and the contacting tab 13 Connection point 21 and via the connection element 7 or its connection contact 9 back in a suitable manner for energy supply. Provided that the assembly 17 contains an additional electrical component between its connecting lugs 17a and 17b, part of the current supplied via the connecting contact 8 of the connecting element 6 does not flow via the connection point 20 into the coil winding 3, but via the extension 10 and / or the leg 10a up to its joint with the connecting lug 17a of the unit 17. Via the electrical additional component contained in the unit 17, this part of the current supplied passes via the connecting lug 17b of the unit 17 to the leg 11a or the extension 11 of the connecting element 7 and on this Paths back via connection contact 9 to the power supply. The additional component contained in the assembly 17 is electrically connected in parallel according to this example of the coil winding 3.

Die Anschlußelemente 6 und 7 mit ihren Fortsätzen 10 und 11 bzw. mit ihren Schenkeln 10a und 11a und ggf. die Baueinheit 17 (Fig. 3) sind zur Herstellung des Spulenkörpers mit Kunststoff umspritzt. Nach der in Fig. 2 und Fig. 3 beispielhaft dargestellten Ausgestaltung entstehen dabei die Flansche 4 und 5 senkrecht zur Längsachse des Spulenkörpers 1 und im Zuge der rechtwinklig zu seiner Längsachse ausgebildeten Anschlußkontakte 8 und 9 der Anschlußelemente 6 und 7; der Tragbereich 2 entsteht im wesentlichen im Bereich der Fortsätze 10 und 11 bzw. der Schenkel 10a und 11a sowie gegebenenfalls im Bereich der Baueinheit 17 (Fig. 3).The connecting elements 6 and 7 with their extensions 10 and 11 or with their legs 10a and 11a and possibly the assembly 17 (FIG. 3) are extrusion-coated with plastic to produce the coil former. According to the configuration shown by way of example in FIGS. 2 and 3, the flanges 4 and 5 are formed perpendicular to the longitudinal axis of the coil former 1 and in the course of the connecting contacts 8 and 9 of the connecting elements 6 and 7 formed at right angles to its longitudinal axis; the support area 2 essentially arises in the area of the extensions 10 and 11 or the legs 10a and 11a and, if appropriate, in the area of the structural unit 17 (FIG. 3).

Fig. 4 zeigt die in einer Anbindung 25 gehaltenen Anschlußelemente 6 und 7, die mit ihren Anschlußkontakten 8 und 9 und ihren Fortsätzen 10 und 11 im wesentlichen eine beispielsweise U-förmige Gestalt aufweisen. Die Anschlußelemente 6 und 7 bilden zusammen mit ihrer Anbindung 25 ein Fertigungsteil 26, das bei einer Bandfertigung Teil des Bandes ist. Die Fortsätze 10 und 11 weisen neben den Schenkeln 10a und 11a parallel verlaufende Schenkel 10b und 11b auf. Zwischen den Schenkeln 10a und 10b bzw. 11a und 11b ist ein Zwischenraum 30 vorhanden. Die Schenkel 11a und 11b des Fortsatzes 11 sind nach Fig. 4 zur weiteren Erhöhung der mechanischen Steifigkeit durch eine Querverbindung 11c miteinander verbunden. Die Baueinheit 17 ist in diesem Ausführungsbeispiel Lücken 16a und 16b überbrückend angeordnet, wobei der Zwischenraum 30 und die Baueinheit 17 so bemessen sind, daß die Baueinheit 17 in den Zwischenraum 30 eingebracht ist.4 shows the connection elements 6 and 7 held in a connection 25, which, with their connection contacts 8 and 9 and their extensions 10 and 11, have an essentially U-shaped configuration, for example. The connection elements 6 and 7 together with their connection 25 form a manufacturing part 26, which is part of the band in a band production. The extensions 10 and 11 have parallel to the legs 10a and 11a extending legs 10b and 11b. A space 30 is present between the legs 10a and 10b or 11a and 11b. The legs 11a and 11b of the extension 11 are connected to one another according to FIG. 4 to further increase the mechanical rigidity by means of a cross connection 11c. In this exemplary embodiment, the structural unit 17 is arranged to bridge gaps 16a and 16b, the intermediate space 30 and the structural unit 17 being dimensioned such that the structural unit 17 is introduced into the intermediate space 30.

Fig. 5 zeigt eine weitere beispielhafte Ausgestaltung eines Fertigungsteils 36, das die Anschlußelemente 6 und 7 enthält, wobei der Schenkel 10b des Fortsatzes 10 sowie der Schenkel 11a des Fortsatzes 11 kurz ausgeführt sind, so daß die zwischen den Enden der Schenkel 10a und 11a gebildete Lücke 16a nahe am Anschlußelement 7 und die zwischen den Enden der Schenkel 10b und 11b gebildete Lücke 16b nahe am Anschlußelement 6 liegt. Damit werden die durch die Lücken 16a und 16b verursachten mechanischen Schwachstellen in unkritische Bereiche nahe den Flanschen 4 und 5 des in Fig. 5 nicht dargestellten, durch Umspritzen des Fertigungsteils 36 hergestellten Spulenkörpers verlegt. Die Schenkel 10a und 11b verlaufen im wesentlichen parallel nebeneinander unter Bildung eines Zwischenraums 30.Fig. 5 shows a further exemplary embodiment of a manufacturing part 36, which contains the connecting elements 6 and 7, the leg 10b of the extension 10 and the leg 11a of the extension 11 are short, so that the formed between the ends of the legs 10a and 11a Gap 16a close to the connection element 7 and the gap 16b formed between the ends of the legs 10b and 11b is close to the connection element 6. The mechanical weak points caused by the gaps 16a and 16b are thus relocated to non-critical areas near the flanges 4 and 5 of the bobbin, not shown in FIG. The legs 10a and 11b run essentially parallel to one another, forming an intermediate space 30.

Die Baueinheit 17 ist den Zwischenraum 30 überbrückend mit ihren Anschlußfahnen 17a und 17b mit dem Schenkel 10a elektrisch leitend verbunden. Der zwischen den Schenkeln 10a und 11b gebildete Zwischenraum 30 und die Baueinheit 17 sind so bemessen, daß die Baueinheit 17 zumindest teilweise in den Zwischenraum 30 eingebracht ist. Eine weitere Anschlußfahne 17c ist mit dem Schenkel 11b elektrisch leitend verbunden. Zwischen den Anschlußfahnen 17b und 17c ist innerhalb der Baueinheit 17 eine in Fig. 5 symbolisch dargestellte Diode 31 angeordnet. Im Hinblick auf die Leistung der einsetzbaren Dioden kann es notwendig sein, eine weitere Diode 32 parallel zur Diode 31 zu schalten. Die Anschlußelemente 6 und 7 können in einem Arbeitsgang, beispielsweise durch Stanzen aus einem Blech, hergestellt werden. Sie bilden zusammen mit der Anbindung 35 das Fertigungsteil 36. Diese Anbindung kann aus demselben Blech gleichzeitig mit den Anschlußelementen 6 und 7 ausgestanzt werden. Nach der in Fig. 5 gezeigten Anordnung der Baueinheit 17 ist es möglich, zunächst die Baueinheit 17 aufzubringen und anschließend die Lücken 16a und 16b herzustellen.The assembly 17 is bridging the intermediate space 30 with its connecting lugs 17a and 17b to the leg 10a in an electrically conductive manner. The intermediate space 30 formed between the legs 10a and 11b and the structural unit 17 are dimensioned such that the structural unit 17 is at least partially introduced into the intermediate space 30. Another terminal lug 17c is electrically conductively connected to leg 11b. A diode 31 symbolically shown in FIG. 5 is arranged between the connecting lugs 17b and 17c within the structural unit 17. With regard to the performance of the diodes that can be used, it may be necessary to connect a further diode 32 in parallel with the diode 31. The connection elements 6 and 7 can be in one Operation, for example by stamping from a sheet metal. Together with the connection 35, they form the production part 36. This connection can be punched out simultaneously with the connection elements 6 and 7 from the same sheet. According to the arrangement of the assembly 17 shown in FIG. 5, it is possible first to apply the assembly 17 and then to produce the gaps 16a and 16b.

Nach Fig. 6 besteht ein Spulenkörper 1 aus zwei im wesentlichen in einer axialen Ebene miteinander verbundenen Spulenkörperteilen 1a und 1b. Der Spulenkörperteil 1a enthält einen Tragbereichsteil 2a für die in Fig. 6 nicht dargestellte Spulenwicklung, der von den im Spulenkörperteil 1a enthaltenen Flanschteilen 4a und 5a begrenzt wird. Der Spulenkörperteil 1b enthält einen ergänzenden Tragbereichsteil 2b, der zusammen mit dem Tragbereichsteil 2a den Tragbereich 2 bildet, sowie ergänzende Flanschteile 4b und 5b der Flansche 4 und 5. In den Spulenkörperteil 1a sind die zuvor ausführlich beschriebenen Anschlußelemente 6 und 7 eingebracht, die Anschlußkontakte 8 und 9 sowie Fortsätze 10 und 11 enthalten. Die Fortsätze 10 und 11 sind, wie bereits in den Figuren 2 bis 5 dargestellt, u. a. als Schenkel 10a und 11a ausgebildet. Die Baueinheit 17 ist nahe am Flansch 5 angeordnet und überbrückt die zwischen den Schenkeln 10a und 11a gebildete Lücke 16a. Die Spulenkörperteile 1a und 1b sind nach innen jeweils halbschalenförmig zur Bildung des axialen Hohlraumes 22 gestaltet; sie sind ferner mit ineinandergreifenden Stegen 40 bzw. Nuten 41 versehen, wodurch der Hohlraum 22 beim Zusammenfügen der Spulenkörperteile 1a und 1b geschlossen wird. Der Spulenkörperteil 1b enthält ein Kontaktelement 42, das sich zu seinem einen Ende hin zu einem Anschlußkontakt 43 verjüngt. Das Kontaktelement 42, das zumindest teilweise in den Spulenkörperteil 1b eingegossen ist, enthält mindestens ein Polblech 44. Dieses Polblech 44 wirkt mit einem in Fig. 6 nicht dargestellten Anker zusammen, der in den axialen Hohlraum 22 eingebracht werden kann.According to FIG. 6, a coil former 1 consists of two coil former parts 1a and 1b which are connected to one another essentially in an axial plane. The coil body part 1a contains a support area part 2a for the coil winding, not shown in FIG. 6, which is delimited by the flange parts 4a and 5a contained in the coil body part 1a. The coil body part 1b contains a supplementary support area part 2b, which together with the support area part 2a forms the support area 2, and additional flange parts 4b and 5b of the flanges 4 and 5. The connection elements 6 and 7, the connection contacts 8, are introduced into the coil body part 1a and 9 and extensions 10 and 11 included. As already shown in FIGS. 2 to 5, the extensions 10 and 11 are designed, inter alia, as legs 10a and 11a. The assembly 17 is arranged close to the flange 5 and bridges the gap 16a formed between the legs 10a and 11a. The coil body parts 1a and 1b are each designed in the shape of a half shell to form the axial cavity 22; they are also provided with interlocking webs 40 or grooves 41, whereby the cavity 22 is closed when the coil former parts 1a and 1b are joined together. The coil body part 1b contains a contact element 42 which tapers towards one end towards a connection contact 43. The contact element 42, which is at least partially cast into the coil body part 1b, contains at least one pole plate 44. This pole plate 44 interacts with an armature, not shown in FIG. 6, which can be introduced into the axial cavity 22.

Nach Fig. 6 ist die von dem Zusatzbauteil 17 überbrückte Lücke 16a in einer parallel zur Ebene des Polbleches verlaufenden Ebene dem Polblech gegenüberliegend angeordnet. Dadurch wird die durch die Lücke 16a hervorgerufene mechanische Schwachstelle kompensiert.According to FIG. 6, the gap 16a bridged by the additional component 17 is arranged opposite the pole plate in a plane running parallel to the plane of the pole plate. This compensates for the mechanical weak point caused by the gap 16a.

Fig. 7 zeigt ein weiteres Fertigungsteil 50, das aus einem Kontaktelement 42 und einer Anbindung 51 besteht. Das mindestens ein Polblech 44 aufweisende Kontaktelement 42 ist mit seinem Anschlußkontakt 43 an der Anbindung 51 befestigt und kann dadurch bei der Herstellung des Spulenkörpers einfach zugeführt, gehandhabt und positioniert werden.FIG. 7 shows a further production part 50, which consists of a contact element 42 and a connection 51. The contact element 42, which has at least one pole plate 44, is fastened with its connection contact 43 to the connection 51 and can thus be easily fed, handled and positioned during the manufacture of the coil former.

Claims (14)

  1. Coil former for an electromagnetic relay, comprising a carrying area (2; 102) for a coil winding (3; 103) and with terminal elements (6, 7; 106, 107) which in each case have a section (12, 13; 113) which can be connected to the winding ends of the coil winding and a further section (8, 9; 108, 109) constructed as terminal contact, at least one terminal element (7; 107) exhibiting a continuation (11; 111) which is arranged in the direction of the coil axis and is embedded in the carrying area (2; 102) of the coil former (1; 101), characterised in that the continuation (111) of the at least one terminal element (107) passes through the carrying area (102) or, respectively, the continuations (10, 11) of a number of terminal elements (6, 7) jointly pass through the carrying area (2), leaving out an insulating gap (16a), and in that, for stiffening the carrying area, the continuation (111) or, respectively, the continuations (10, 11) is or, respectively, are completely closed off with respect to the winding (3; 103) by the material of the coil former (1; 101).
  2. Coil former according to Claim 1, characterised in that each continuation (10, 11; 111) exhibits one or a number of legs (10a, 11a; 10a, 10b; 11a, 11b) extending in the longitudinal direction of the carrying area.
  3. Coil former according to Claim 2, characterised in that the legs (10a, 10b; 11a, 11b) of two continuations (10, 11) extend parallel to one another, at least partially overlapping one another in the carrying area.
  4. Coil former according to Claim 2 or 3, characterised in that one continuation (10) exhibits at least two legs (10a, 10b) of different lengths, which extend parallel to one another, and in that the other continuation (11) exhibits the same number of legs (11a, 11b) of corresponding lengths, which extend parallel to one another so that gaps (16a, 16b), which are located in different planes perpendicular to the longitudinal axis of the coil former (1) are formed between the ends of the legs (10a, 10b; 11a, 11b) pointing against one another.
  5. Coil former according to one of Claims 2 to 4, characterised in that the legs (10a, 11a) of the continuations (10, 11) are connected to one another via at least one constructional unit (17) located at least partially inside the carrying area (2) of the coil former (1).
  6. Coil former according to Claim 5, characterised in that the constructional unit (17) comprises at least one additional electrical component (31) and that the legs (10a, 11a) of the continuations (10, 11) are electrically connected to one another via the additional electrical component (31).
  7. Coil former according to Claim 5 or 6, characterised in that the at least one constructional unit (17) is arranged bridging at least one gap (16a) between the ends of the legs (10a, 11a) of the continuations (10, 11).
  8. Coil former according to Claim 5 or 6, characterised in that the at least one constructional unit (17) is arranged bridging at least one intermediate space (30) formed between the legs (10a, 11b), extending in parallel, of various continuations (10, 11).
  9. Coil former according to one of Claims 5 to 8, characterised in that the intermediate space (30) formed between the legs (10a, 10b, 11a, 11b) of the continuations (10, 11) and the constructional unit (17) are dimensioned in such a manner that the constructional unit (17) can be at least partially inserted into the intermediate space (30).
  10. Coil former according to Claim 4, characterised in that it exhibits in a hollow space (22) constructed in the direction of its longitudinal axis at least one pole plate (44) which is a part of a contact element (42) at least partially surrounded by the material of the coil former (1), and in that the pole plate (44) is arranged in the area of a gap (16a) between two legs (10a, 11a; 10b, 11b) and parallel to these.
  11. Method for fabricating a coil former (1; 101) comprising a carrying area (2; 102) for the coil winding (3; 103), in which method a production part (26; 36) cut free out of a strip, which contains the terminal elements (6, 7; 106, 107) for the winding (3; 103), is embedded in plastic, characterised in that at least one of the terminal elements (6, 7; 107) for the winding is cut free with an elongated continuation (10, 11; 111) and in that the carrying area (2; 102) of the coil former is formed by embedding the continuation (111) or, respectively, the continuations (10, 11) in plastic.
  12. Method according to Claim 11, characterised in that the carrying area (2a) of a first coil former part (1a) is formed by embedding the continuation (111) or, respectively, the continuations (10, 11), in that the carrying area (2b) of a second coil former part (1b) is formed by embedding a further production part (50) containing at least one contact element (44) and in that the two coil former parts (1a, 1b) are joined together to form the coil former (1).
  13. Method according to Claim 11 or 12, characterised in that continuations (10, 11) of two coil terminal elements (6, 7) of one production part (26, 36) are cut free out of the strip, forming a gap (16a, 16b), and in that, before this production part is embedded, an electrical constructional unit (17) is inserted into the gap and is connected to the continuations (10, 11) of both terminal elements (6, 7).
  14. Method according to Claim 11 or 12, characterised in that the continuations (10, 11) of two terminal elements (6, 7) are cut out integrally on a production part, in that a constructional unit is connected to the continuations (10, 11) of both terminal elements (6, 7), whilst at the same time bridging the latter, and in that then the gaps (16a, 16b) necessary for electrically insulating the terminal elements (6, 7) are formed before the continuations (10, 11) are embedded in plastic.
EP89904004A 1988-04-15 1989-04-10 Spool body and process for producing a spool body Expired - Lifetime EP0410984B1 (en)

Applications Claiming Priority (2)

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DE3813119 1988-04-15
DE3813119A DE3813119A1 (en) 1988-04-15 1988-04-15 BOBBIN AND METHOD FOR PRODUCING A BOBBIN

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EP0410984A1 EP0410984A1 (en) 1991-02-06
EP0410984B1 true EP0410984B1 (en) 1993-06-23

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JP (1) JPH03503693A (en)
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EP0410984A1 (en) 1991-02-06
JPH03503693A (en) 1991-08-15
WO1989009999A1 (en) 1989-10-19
DE3813119A1 (en) 1989-10-26
DE58904810D1 (en) 1993-07-29

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