Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F17/00—Fixed inductances of the signal type 
  • H01F17/04—Fixed inductances of the signal type  with magnetic core
  • H01F17/041—Means for preventing rotation or displacement of the core
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F27/00—Details of transformers or inductances, in general
  • H01F27/02—Casings
  • H01F27/027—Casings specially adapted for combination of signal type inductors or transformers with electronic circuits, e.g. mounting on printed circuit boards
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
  • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
  • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
  • H01F41/06—Coil winding
  • H01F41/098—Mandrels; Formers
• • 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 coil winding, in particular RM bobbins, consisting of a cylindrical bobbin, a lower flange which is provided with lateral lugs forming wire guide slots and carrying solder pins, and an upper flange, the means for receiving and taking along the bobbin on the automatic winder, the bobbin being provided for use with a two-part core which surrounds the bobbin in its plateau in a shell-shaped manner and is held together by an elastic clamp arrangement and is shaped in such a way that the lateral Lugs of the lower flange and the means of the upper flange for receiving and driving the coil form lie outside the core.
• the invention further relates to an electrical coil with a coil body of the type mentioned, a core which encloses the coil body in its plateau in the form of a shell, is divided into two parts and is divided in a horizontal plane and which only partially covers the upper flange of the coil body, an elastic clamp arrangement holding the core together and an elastic tolerance compensation element for fixing the coil body in the receiving space formed by the core.
• Known bobbins of the type mentioned above are made of phenolic resin or, for some time, also of modified, unsaturated polyester resins (cf. DE 42 20 287 AI). Replacing the phenolic resin that used to be the case with a modified UP resin leads to a more temperature-resistant coil body that can withstand even higher soldering temperatures.
• a disadvantage of the UP bobbin is its reduced stability, which is caused in the area of the lower flange a special design according to DE 42 20 287 AI can be compensated.
• the known coil formers are known in particular in the "RM coil form” embodiment, the dimensions of which are defined in the DIN 41981 standard.
• the known bobbins regularly have a V-shaped or U-shaped recess in the upper flange, that is to say a radially outward opening, into which a correspondingly shaped counterpart of the automatic winder can engage in order to take the bobbin in the automatic winder and position it.
• the known bobbins are used together with sheath cores which are formed in two parts and have an abutment plane in the middle of the bobbin, parallel to the flanges.
• the core surrounds the coil former in the form of a jacket in the plateau, that is to say it encompasses the upper and lower sides of the coil former as well as two opposite parts of the lateral surfaces over its width.
• the core is designed so that the lateral approaches of the lower flange and laterally outside with respect to the plateau are not covered by the core because of the sections of the upper flange. Since the core surrounds the coil former in the plateau in the form of a jacket, it forms a rigid receiving space for the coil former.
• the receiving space of the core is made with a slight oversize and an elastic tolerance compensation disc is placed on the upper flange of the bobbin before the core by means of a elastic bracket assembly, consisting of two side clips, is closed.
• the elastic tolerance compensation element By means of the elastic tolerance compensation element, the coil body is held firmly and rattle-free in the receiving space of the core.
• the problem on which the invention is based is to enable increased stability of the coil body in the region of the upper flange, specifically with measures which enable compliance with the DIN 41981 standard.
• a bobbin of the type mentioned is characterized according to the invention in that the upper flange is solid without recesses and that the means for receiving and driving the bobbin on the winding machine are formed by webs arranged on the top of the upper flange, one radially Limit the open recording space on the outside.
• the invention is based on the finding that such a partial increase in the overall height is possible because the webs formed upward on the upper flange project into a free space next to the jacket core and therefore the previous design of the electrical coils - also in the frame the DIN regulation - do not impair.
• two sloping webs delimit a V-shaped receiving space.
• the increase in the stability of the coil body in the region of the upper flange which can be achieved according to the invention allows the application area of the UP coil formers, which are advantageous for thermal reasons, to be enlarged.
• the invention also offers advantages for the previous phenolic bobbins, which do not pose any stability problems, because increasingly thicker winding wires are used which "place a higher load on the bobbin, in particular on the upper flange, during the winding process".
• Figure 2 - a plan view of the coil arrangement according to
• FIG. 3 shows a section in a plateau rotated by 90 ° with respect to FIG. 1 of an exemplary embodiment of a coil according to the invention
• Figure 4 - a plan view of the arrangement according to Figure
• the electrical coil according to the prior art shown in FIGS. 1 and 2 has a coil former 1 and a ferromagnetic core 2.
• the coil former 1 consists of a hollow cylindrical winding former 3, which is delimited at the bottom by a lower flange 4 and at the top by an upper flange 5.
• A (not shown) is placed on the outer shell of the winding body 3 electrical winding, and the flanges 4, 5 limit the winding space up and down.
• the coil former 1 is surrounded by the core 2 in the form of a jacket in the form of a jacket, the core 2 consisting of two core halves 6, 7.
• the core halves 6, 7 meet in a horizontal plane 8, which is parallel to the flanges 4, 5 and is arranged halfway up the height of the coil body 1.
• the core halves 6, 7 are held together by two clamps 9 which overlap the core halves 6, 7 from below and above and elastically press the core halves 6, 7 against one another.
• FIG. 2 shows that the core halves 6, 7 are somewhat constricted in the middle on the top and bottom of the bobbin 1 and only partially cover the flanges 4, 5 of the circular-cylindrical bobbin 1. In the area of the upper flange 5 which is not covered, an approximately V-shaped recess 10 is provided there, which serves to receive and carry the bobbin 1 in a winding machine.
• the lower flange 4 is provided with lateral lugs 11 which project from the lower flange 4 transversely to the direction of extension of the core 2, each form a wire guide slot 12 and carry solder pins 13.
• the core 2 forms a receiving space 14 for the coil former 1.
• an elastic annular disc 15 is inserted as a tolerance compensation element on the top of the upper flange 5 of the coil former 1, which - depending on the remaining distance between the coil former 1 and the top of the receiving space 14 - is more or less compressed, but in any case ensures a rattle-free fit of the coil former 1 in the receiving space 14 of the core 2.
• the section shown in Figure 3 through a plateau of a coil former according to the invention is rotated by 90 ° with respect to the section plane of Figure 1.
• the lower flange 104 of the bobbin 101 according to the invention with its lugs 111 is unchanged with respect to the flange 4 of the bobbin 1.
• the winding body 103 has a somewhat greater height, since the elastic washer 15 has been omitted as a tolerance compensation device.
• the upper flange 105 is formed without a recess 10 in relation to the flange 5, that is to say in the exemplary embodiment shown as an annular disk with a constant thickness.
• the upper flange 105 is provided on its upper side with two webs 110 which are at an angle to one another and delimit an approximately V-shaped receiving space into which a correspondingly shaped take-up and driver of the winding machine are inserted laterally can and so fixes the position of the bobbin 101.
• the clamp arrangement 109 is formed in one piece and extends over the entire upper side of the core 2 and with two legs laterally below the underside of the lower core half 106, so that the two core halves 106, 107 against each other in the abutting plane 108 to press.
• the clip 109 is provided on the top of the core 102 and the upper core half 107 with two lateral lugs 116, 117, which extend across the width of the core 102 and with angled downward resilient ends 118, 119 on the top of the Press the upper flange 105 of the bobbin 101.
• the leg 118 angled downward is angled by less than 90 ° and lies obliquely on the webs 110.
• leg 119 is angled almost at right angles and extends directly to the top of the upper flange 105, since there are no webs 110 in its area. To improve the elastic support, the leg 119 is slightly outward at its free end 120 crimped.
• the clip 109 in the exemplary embodiment shown not only has the function of holding the two core halves 106, 107 together, but also of pressing the coil former 101 against the lower wall of the receiving space 114 with an elastic prestress. in order to ensure a tight and rattle-free fit of the coil former 101 in the receiving space 114 of the core 102 even in the event of manufacturing tolerances, which in the illustrated embodiment is higher by the tolerance range T than the coil former 101, since the cut part the upper core half 107 protrudes into the interior of the hollow cylindrical bobbin 101.
• the uninterrupted design of the upper flange 105 improves the mechanical stability, but also the dielectric strength, of the coil former 101, the advantageous handling in a coil winding machine being retained due to the webs 110.
• the webs 110 lie next to the core 102 and therefore do not lead to an enlargement of the overall construction at any point.

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Manufacturing & Machinery (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Insulating Of Coils (AREA)
• Magnetically Actuated Valves (AREA)
• Manufacture Of Motors, Generators (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=6518934

Family Applications (1)

Country Status (5)

Family Cites Families (6)

• 1994
  • 1994-05-25 DE DE4418246A patent/DE4418246C2/de not_active Expired - Fee Related
• 1995
  • 1995-05-19 WO PCT/DE1995/000684 patent/WO1995032511A1/fr active IP Right Grant
  • 1995-05-19 EP EP95919326A patent/EP0711449B1/fr not_active Expired - Lifetime
  • 1995-05-19 DE DE59502881T patent/DE59502881D1/de not_active Expired - Fee Related
  • 1995-05-19 CA CA002167812A patent/CA2167812A1/fr not_active Abandoned
  • 1995-05-19 AT AT95919326T patent/ATE168814T1/de not_active IP Right Cessation

Non-Patent Citations (1)

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