EP0766270A2 - Corps de bobine - Google Patents

Corps de bobine Download PDF

Info

Publication number
EP0766270A2
EP0766270A2 EP96115347A EP96115347A EP0766270A2 EP 0766270 A2 EP0766270 A2 EP 0766270A2 EP 96115347 A EP96115347 A EP 96115347A EP 96115347 A EP96115347 A EP 96115347A EP 0766270 A2 EP0766270 A2 EP 0766270A2
Authority
EP
European Patent Office
Prior art keywords
coil
winding
shoulder
coil former
lower step
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.)
Withdrawn
Application number
EP96115347A
Other languages
German (de)
English (en)
Other versions
EP0766270A3 (fr
Inventor
Peter Ahrens
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.)
Hohenloher Kunststofftechnik GmbH and Co KG
Original Assignee
Hohenloher Spulenkoerperfabrik GmbH and Co
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 Hohenloher Spulenkoerperfabrik GmbH and Co filed Critical Hohenloher Spulenkoerperfabrik GmbH and Co
Publication of EP0766270A2 publication Critical patent/EP0766270A2/fr
Publication of EP0766270A3 publication Critical patent/EP0766270A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/02—Coils wound on non-magnetic supports, e.g. formers

Definitions

  • the invention relates to a bobbin for automatic winding, with a cylindrical winding body which is provided with flanges on the end faces, at the lower end of which there are webs running perpendicular to the winding body and carrying a plurality of soldering pins, the soldering pins being spaced apart in parallel, a receiving slot leaving free receiving parts.
  • Such a bobbin is known for example from DE-PS 33 21 745 and is usually designed as a molded plastic part.
  • the solder pins are injected into the receiving parts.
  • Such bobbins can be wound with a plurality of windings made of different wires, each of which has its ends wound around the solder pins for contact formation. So that the wires can be guided from the winding body to the solder pins, the receiving parts, in which the solder pins are injected, are spaced parallel to one another and leave a lead-through slot free.
  • the wire was first wound around the soldering pin intended for it, then passed through one of the feed-through slots and wound around the winding body with the desired number of windings, then fed back through one of the feed-through slots and wound around the soldering pin provided for this purpose with its end.
  • Coil formers which have two vertically spaced pins on the lugs which are directed outward parallel to the winding former and which serve to guide the wires when they are passed through the lead-through slots and run to the solder pins or vice versa.
  • the lead-through slots present in the known bobbins are relatively narrow. When using thicker wires, especially if they are also provided with strong insulation, they can often no longer be passed through the lead-through slots. It is also problematic that with increasing winding of the winding body, the wires may have to be guided from far outside to the middle, that is to say they have to travel a long way past the receiving parts below the web.
  • the distance between the two pins formed in the known embodiment of the bobbin allows the passage of thicker wires, but the requirement for a compact design means that the height of the bobbin must be reduced. Since the diameter of the winding body depends on the required power of the coil, it is excluded from a reduction in diameter to reduce the size of the coil body. The shortening of the installation space must therefore be done by changing or reducing the size of the receiving parts. Then, however, the distance between the pins becomes so small that thick wires can no longer be passed through here. In addition, the thicker wires must also be securely soldered to the solder pins.
  • a thicker wire inevitably leads to a larger solder joint, which means to avoid unwanted contact on the circuit board due to the larger solder joint, the distance between the circuit board and the solder joint must be increased. This means that the receiving parts must be made shorter, which inevitably means that the distance between the two pins would inevitably be smaller.
  • the coil body should be changed so that it can be reduced in height and the guide space formed on the approaches for the solder pins for the wires is either maintained or enlarged so that thick wires can be wound.
  • each receiving part has an outwardly directed and stepped extension that runs parallel to the winding body.
  • different guide channels for the winding wires are formed on the coil former.
  • the gradation creates at least two guide channels.
  • the wires can therefore run through channels lying in different planes.
  • the wire path can be spaced one above the other or in parallel.
  • the channel is enlarged by the gradation. It is therefore possible to reduce the overall height to such an extent that the channel height remains constant compared to conventional bobbins or, with the same overall height, the performance of the coil can be increased considerably since thicker wires can be wound.
  • the receiving part By enlarging the guide or laying channels, the receiving part can be shortened without any problems, so that even thick wires can be securely soldered to the solder pins, without the risk of faulty contacts later on the circuit board, because the solder joint protrudes beyond the solder pins.
  • the approach preferably has two stages. It is particularly advantageous if the lower step protrudes further outwards than the upper step. This then forms an upper channel lying further inward with respect to the winding former, which has a low height for thin wires and a channel running parallel to it depending on the step height wider channel is formed, which is provided for guiding thicker wires or, in the case of a fully wound coil, wires extending from far outside to inside.
  • the upper step has a region which runs horizontally to the shoulder and merges into a region which is beveled in the direction of the lower step. This not only makes it easier to remove the bobbin from the injection mold, it also avoids sharp-edged transitions that could break the insulation of the coil wires. Accordingly, it is also advantageous if the lower step is chamfered.
  • soldering pins are inserted into the attachment centrally to the area running perpendicular.
  • the bobbin shown in the drawing has a winding body 1 which is delimited by flanges 2 and which is designed in the usual way to accommodate the coil windings. Towards the end faces, the flanges are joined by webs 4, which are provided with receiving parts 8, which are spaced apart in parallel, for the soldering pins 6.
  • the webs 4 are located below the winding body 1. They are connected via vertical supports 15 attached at their end to webs 3 which run parallel to the webs 4 and are provided for reasons of stability. Support struts 16 which are triangular in cross section serve to reinforce the connection of the webs 3 to the flanges 2. Grooves 21 and incisions 20 provided on the webs 3, 4 serve to avoid curvature when the coil former cools down after spraying.
  • spacers 9 are attached laterally, at the lower end of which feet 5 are provided, by means of which the coil former sits on the printed circuit board (not shown here).
  • the spacers 9 are aligned parallel to the solder pins 6 and consequently limit the insertion path of the coil former into the prefabricated holes in a printed circuit board.
  • the lead-through slots 7 provided between the receiving parts 8 serve to lead the coil wire coming from the winding former 1 forward, along or into the laying channels 7 ', so that it can then be wound around the soldering pin 6 intended for it and soldered to it.
  • the flanges 2 with runners 18 approach some of the receiving parts 8.
  • the receiving part 8 has an outwardly directed extension 10, which runs parallel to the winding body 1 and is designed in a stepped manner.
  • the approach 10 has an upper step 14 and a lower step 13, which protrudes further outwards compared to the upper step 14.
  • the upper step 14 is formed by a horizontally extending region 11 and a beveled region 12 which adjoins it at an angle of 10 ° in the direction of the lower step 13.
  • the lower step 13 is also beveled at an angle of 10 °. Of course, larger or smaller angles of the bevel are also conceivable.
  • the height of the laying channel 7 ' is lower than the height between the lower step 13 and the web 4.
  • the design of the extension 10 not only realizes a deeper design of the channel 7', but also the height is significantly increased, at least in the area of the second step 13, so that even thick wires or wires provided with thick insulations can not only be pulled through safely but also inserted securely.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Insulating Of Coils (AREA)
EP96115347A 1995-09-29 1996-09-25 Corps de bobine Withdrawn EP0766270A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19536544 1995-09-29
DE1995136544 DE19536544C2 (de) 1995-09-29 1995-09-29 Spulenkörper

Publications (2)

Publication Number Publication Date
EP0766270A2 true EP0766270A2 (fr) 1997-04-02
EP0766270A3 EP0766270A3 (fr) 1997-05-21

Family

ID=7773722

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96115347A Withdrawn EP0766270A3 (fr) 1995-09-29 1996-09-25 Corps de bobine

Country Status (2)

Country Link
EP (1) EP0766270A3 (fr)
DE (1) DE19536544C2 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3220002A1 (de) * 1982-05-27 1983-12-01 Siemens AG, 1000 Berlin und 8000 München Spulenkoerper fuer elektrische spulen
DE3321745A1 (de) * 1983-06-16 1984-12-20 Hohenloher Spulenkörperfabrik, 7110 Öhringen Spritzteil aus thermoplastischem kunststoff und verfahren zu seiner herstellung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3220002A1 (de) * 1982-05-27 1983-12-01 Siemens AG, 1000 Berlin und 8000 München Spulenkoerper fuer elektrische spulen
DE3321745A1 (de) * 1983-06-16 1984-12-20 Hohenloher Spulenkörperfabrik, 7110 Öhringen Spritzteil aus thermoplastischem kunststoff und verfahren zu seiner herstellung

Also Published As

Publication number Publication date
DE19536544A1 (de) 1997-04-03
EP0766270A3 (fr) 1997-05-21
DE19536544C2 (de) 1998-02-19

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