CA2205787A1 - Device for the mutual fixing of ferromagnetic cores and carriers for el ectrical conductors in inductive components - Google Patents
Device for the mutual fixing of ferromagnetic cores and carriers for el ectrical conductors in inductive componentsInfo
- Publication number
- CA2205787A1 CA2205787A1 CA 2205787 CA2205787A CA2205787A1 CA 2205787 A1 CA2205787 A1 CA 2205787A1 CA 2205787 CA2205787 CA 2205787 CA 2205787 A CA2205787 A CA 2205787A CA 2205787 A1 CA2205787 A1 CA 2205787A1
- Authority
- CA
- Canada
- Prior art keywords
- spring
- annular
- annular spring
- toothing
- carriers
- 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.)
- Abandoned
Links
- 239000004020 conductor Substances 0.000 title claims abstract description 9
- 230000005294 ferromagnetic effect Effects 0.000 title claims abstract description 8
- 230000001939 inductive effect Effects 0.000 title claims abstract description 8
- 239000000969 carrier Substances 0.000 title claims abstract description 5
- 239000007769 metal material Substances 0.000 claims abstract description 4
- 239000003302 ferromagnetic material Substances 0.000 claims description 2
- 239000002356 single layer Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 description 5
- 230000007774 longterm Effects 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
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
- H01F17/043—Fixed inductances of the signal type with magnetic core with two, usually identical or nearly identical parts enclosing completely the coil (pot cores)
-
- 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
- H01F27/24—Magnetic cores
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/266—Fastening or mounting the core on casing or support
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Coils Or Transformers For Communication (AREA)
- Bolts, Nuts, And Washers (AREA)
Abstract
Device for the mutual fixing of ferromagnetic cores and carriers for electrical conductors in inductive components, with a slotted annular spring (10) made from metallic material and arranged between the ferromagnetic core and the coil former.
Description
CA 0220~787 1997-0~-22 Description Device for the mutual fixing of ferromagnetic cores and carriers for electrical conductors in inductive components.
The present invention relates to a device for the mutual fixing of ferromagnetic cores and carriers for electrical conductors in inductive components.
In the case of pin-type designs of inductive components, the core and the coil former are clamped by means of plastic insulating discs for the purpo~e of mutual fixing, the core being additionally soldered into a circuit board via a clip for permanent fastening. This presents the difficulty that plastic in~ulating discs do not have long-term stability and are unsuitable for temperatures which occur during soldering operations.
Furthermore, the core and the coil former can also be fixed relative to one another by adhesive bond-ing, this being the case particularly in SND inductors.
However, this is comparatively expensive and is not reliable in terms of the process employed and, further-more, there is no possibility of remach;n;ng or recycling.
The first-mentioned possibility of clamping the core and coil former in pin-type designs by means of plastic insulating discs is illustrated in Figure 7 of the drawings. A design of this kind is known, for example, from the applicant's manual "Ferrite und Zubehor" ~"Ferrites and Accessoriesn], 1994 edition, page 215.
Figure 7 shows the essential parts of an induc-tive component in the form of an exploded illustration.
The component possesses a coil former 1 and two magnetic-core halves 2, 3 which are placed onto the coil former 1 and are held on the coil former by means of clips 5. A
first insulating disc 4 is inserted between the coil former 1 and the upper core half 2. A second insulating disc 6 is placed onto the underside of the lower core half 3. When the component is being assembled by means of CA 0220~787 1997-0~-22 the clip8 5 and when the component is being fitted, for example, into a circuit board, the coil former 1 and the core halves 2, 3 are fixed relative to one another so as to be secure against mutual rotation.
The object on which the present invention i8 based i8 to provide a fixing of the abovementioned type which is free of play and secure against mutual rotation and which has long-term stability and is still resistant even to high temperatures, such as occur, for example, during soldering.
In a device of the type mentioned in the intro-duction, this object is achieved, according to the invention, by means of the measures according to the characterizing clause of Patent Claim 1.
Developments of the invention are the subject of subclaims.
The invention is explained in more detail below by means of exemplary embodiments illustrated in the figures of the drawing. In this, Figures 1 to 6 show, in each case, an embodiment of a fixing spring according to the invention, and Figure 7 show~ the already explained pin-type design of an inductive component.
According to Figure 1, an annular spring 10 having a slot 11 i~ provided. This annular spring 10, 11 is produced from metallic material. The metallic material may be a non-ferromagnetic or slightly ferromagnetic material. The slot 11 is essential for an electrical interruption of the spring body.
The spring 10 has an externally ~lotted toothing 12, Figure 1 indicating a rotation of the toothing about an axis r~nn;ng in the radial direction, thereby bringing about the spring effect.
In the case of an annular spring 20 having a slot 21 according to Figure 2, an internally slotted toothing 22 is provided, a rotation of the toothing being provided once again for the purpose of implementing the spring effect.
In the embodiment of a spring 30 having a slot 31 according to Figure 3, a toothing 32 in the form of a CA 0220~787 1997-0~-22 .
toothed ring is provided, the teeth likewise being rotated again in order to implement the spring effect.
Figures 4A and 4B show an annular spring 40 having a slot 41 in the form of a cup spring with a curvature which i8 evident from Figure 4B and which ensures the spring effect.
Figures 5A and 5B show an annular spring 50 having a slot 51, in which spring the spring body is rotated in the annular plane in the way evident from Figure 5B.
Figure 6 shows a cup spring 60 having a slot 61 in the form of annular segments which are connected to one another at one end and which have a curvature (not illustrated in any more detail) perpendicularly to the drawing plane for the purpose of implementing the spring effect.
The springs illustrated in Figures 1 to 6 can be used, for example instead of the insulating disc 4 according to Figure 7, for fixing the coil former 1 and the coil halves 2, 3 relative to one another.
It must be pointed out that the carrier for electrical conductors does not have to be exclusively a coil former of the type illustrated in Figure 7. It may also be a single-layer or multi-layer printed board.
The present invention relates to a device for the mutual fixing of ferromagnetic cores and carriers for electrical conductors in inductive components.
In the case of pin-type designs of inductive components, the core and the coil former are clamped by means of plastic insulating discs for the purpo~e of mutual fixing, the core being additionally soldered into a circuit board via a clip for permanent fastening. This presents the difficulty that plastic in~ulating discs do not have long-term stability and are unsuitable for temperatures which occur during soldering operations.
Furthermore, the core and the coil former can also be fixed relative to one another by adhesive bond-ing, this being the case particularly in SND inductors.
However, this is comparatively expensive and is not reliable in terms of the process employed and, further-more, there is no possibility of remach;n;ng or recycling.
The first-mentioned possibility of clamping the core and coil former in pin-type designs by means of plastic insulating discs is illustrated in Figure 7 of the drawings. A design of this kind is known, for example, from the applicant's manual "Ferrite und Zubehor" ~"Ferrites and Accessoriesn], 1994 edition, page 215.
Figure 7 shows the essential parts of an induc-tive component in the form of an exploded illustration.
The component possesses a coil former 1 and two magnetic-core halves 2, 3 which are placed onto the coil former 1 and are held on the coil former by means of clips 5. A
first insulating disc 4 is inserted between the coil former 1 and the upper core half 2. A second insulating disc 6 is placed onto the underside of the lower core half 3. When the component is being assembled by means of CA 0220~787 1997-0~-22 the clip8 5 and when the component is being fitted, for example, into a circuit board, the coil former 1 and the core halves 2, 3 are fixed relative to one another so as to be secure against mutual rotation.
The object on which the present invention i8 based i8 to provide a fixing of the abovementioned type which is free of play and secure against mutual rotation and which has long-term stability and is still resistant even to high temperatures, such as occur, for example, during soldering.
In a device of the type mentioned in the intro-duction, this object is achieved, according to the invention, by means of the measures according to the characterizing clause of Patent Claim 1.
Developments of the invention are the subject of subclaims.
The invention is explained in more detail below by means of exemplary embodiments illustrated in the figures of the drawing. In this, Figures 1 to 6 show, in each case, an embodiment of a fixing spring according to the invention, and Figure 7 show~ the already explained pin-type design of an inductive component.
According to Figure 1, an annular spring 10 having a slot 11 i~ provided. This annular spring 10, 11 is produced from metallic material. The metallic material may be a non-ferromagnetic or slightly ferromagnetic material. The slot 11 is essential for an electrical interruption of the spring body.
The spring 10 has an externally ~lotted toothing 12, Figure 1 indicating a rotation of the toothing about an axis r~nn;ng in the radial direction, thereby bringing about the spring effect.
In the case of an annular spring 20 having a slot 21 according to Figure 2, an internally slotted toothing 22 is provided, a rotation of the toothing being provided once again for the purpose of implementing the spring effect.
In the embodiment of a spring 30 having a slot 31 according to Figure 3, a toothing 32 in the form of a CA 0220~787 1997-0~-22 .
toothed ring is provided, the teeth likewise being rotated again in order to implement the spring effect.
Figures 4A and 4B show an annular spring 40 having a slot 41 in the form of a cup spring with a curvature which i8 evident from Figure 4B and which ensures the spring effect.
Figures 5A and 5B show an annular spring 50 having a slot 51, in which spring the spring body is rotated in the annular plane in the way evident from Figure 5B.
Figure 6 shows a cup spring 60 having a slot 61 in the form of annular segments which are connected to one another at one end and which have a curvature (not illustrated in any more detail) perpendicularly to the drawing plane for the purpose of implementing the spring effect.
The springs illustrated in Figures 1 to 6 can be used, for example instead of the insulating disc 4 according to Figure 7, for fixing the coil former 1 and the coil halves 2, 3 relative to one another.
It must be pointed out that the carrier for electrical conductors does not have to be exclusively a coil former of the type illustrated in Figure 7. It may also be a single-layer or multi-layer printed board.
Claims (12)
1. Device for fixing ferromagnetic cores (2, 3) and carriers (1) for electrical conductors in inductive components, particularly in inductors designed for SMD
assembly, characterized in that a slotted annular spring (10; 20; 30; 40; 50; 60) made from metallic material is provided in a gap between the ferromagnetic core (2, 3) and the carrier (1) for electrical conductors.
assembly, characterized in that a slotted annular spring (10; 20; 30; 40; 50; 60) made from metallic material is provided in a gap between the ferromagnetic core (2, 3) and the carrier (1) for electrical conductors.
2. Device according to Claim 1, characterized in that the material of the annular spring (10; 20; 30; 40;
50; 60) is a non-ferromagnetic material.
50; 60) is a non-ferromagnetic material.
3. Device according to Claim 1 and/or 2, characterized in that the annular spring is an externally toothed annular spring (10, 11, 12; 30, 31, 32).
4. Device according to Claim 1 and/or 2, characterized in that the annular spring in an internally toothed annular spring (20, 21, 22).
5. Device according to one of Claims 1 to 4, characterized in that the toothing (12; 22) of the annular spring (10, 11, 12; 20, 21, 22) is a slotted toothing.
6. Device according to one of Claims 1 to 4, characterized in that the toothing (32) of the annular spring (30, 31, 32) is a toothed-ring toothing.
7. Device according to Claim 1, characterized in that the annular spring is a cup spring (40, 41; 50, 51).
8. Device according to Claim 7, characterized in that the cup spring is an annular spring (40, 41) curved in the annular plane.
9. Device according to Claim 7, characterized in that the cup spring is an annular spring (50, 51) rotated in the annular plane.
10. Device according to Claim 7, characterized in that the cup spring (60, 61, 62) is formed from two curved annular segments (62) connected to one another at one end.
11. Device according to one of Claims 1 to 10, characterized in that the carrier (1) for electrical conductors is a coil former.
12. Device according to one of Claims 1 to 10, characterized in that the carrier for electrical conductors is an at least single-layer printed board.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19621126 | 1996-05-24 | ||
| DE19621126.3 | 1996-05-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2205787A1 true CA2205787A1 (en) | 1997-11-24 |
Family
ID=7795327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2205787 Abandoned CA2205787A1 (en) | 1996-05-24 | 1997-05-22 | Device for the mutual fixing of ferromagnetic cores and carriers for el ectrical conductors in inductive components |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0809264A1 (en) |
| JP (1) | JPH1064733A (en) |
| KR (1) | KR970076914A (en) |
| CN (1) | CN1167991A (en) |
| CA (1) | CA2205787A1 (en) |
| SG (1) | SG54499A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001349348A (en) * | 2000-06-05 | 2001-12-21 | Aichi Mach Ind Co Ltd | Two-way differential clutch |
| DE102015104794A1 (en) * | 2015-03-27 | 2016-09-29 | Epcos Ag | Inductive component and method for producing an inductive component |
| GB2581322B (en) * | 2018-12-23 | 2022-09-21 | Secheron Hasler Uk Ltd | A device for the transfer of electric current including a contact washer |
| CN112034218B (en) * | 2020-09-22 | 2024-04-05 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | CAF testing device and testing method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR996091A (en) * | 1945-04-24 | 1951-12-12 | Comp Generale Electricite | Method of protecting a coil with or without a magnetic core and corresponding sealed assembly |
| DE854382C (en) * | 1951-02-27 | 1952-11-04 | Schaub Appbau Ges M B H G | Method of fixing coils on cores or in tubes |
| GB1125275A (en) * | 1964-08-30 | 1968-08-28 | Plessey Uk Ltd | Improvements relating to electromagnetic apparatus |
| DE1564623A1 (en) * | 1966-06-10 | 1969-07-24 | Siemens Ag | Multi-turn coil or transformer |
| CH499188A (en) * | 1968-08-02 | 1970-11-15 | Telefunken Patent | Pot core coil used in communications technology with several symmetrical windings, in particular Pupin's coil |
| FR2118872B1 (en) * | 1970-12-24 | 1973-12-07 | Fr |
-
1997
- 1997-04-21 EP EP97106573A patent/EP0809264A1/en not_active Withdrawn
- 1997-04-25 SG SG1997001312A patent/SG54499A1/en unknown
- 1997-05-21 JP JP14601497A patent/JPH1064733A/en active Pending
- 1997-05-22 KR KR1019970019903A patent/KR970076914A/en not_active Application Discontinuation
- 1997-05-22 CA CA 2205787 patent/CA2205787A1/en not_active Abandoned
- 1997-05-23 CN CN 97111296 patent/CN1167991A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1064733A (en) | 1998-03-06 |
| SG54499A1 (en) | 1998-11-16 |
| CN1167991A (en) | 1997-12-17 |
| KR970076914A (en) | 1997-12-12 |
| EP0809264A1 (en) | 1997-11-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |