GB2272109A - Laminated coiled conductive pattern and terminal arrangement - Google Patents
Laminated coiled conductive pattern and terminal arrangement Download PDFInfo
- Publication number
- GB2272109A GB2272109A GB9322265A GB9322265A GB2272109A GB 2272109 A GB2272109 A GB 2272109A GB 9322265 A GB9322265 A GB 9322265A GB 9322265 A GB9322265 A GB 9322265A GB 2272109 A GB2272109 A GB 2272109A
- Authority
- GB
- United Kingdom
- Prior art keywords
- conductive pattern
- insulating sheet
- main surface
- insulating
- coil
- 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.)
- Granted
Links
- 238000004804 winding Methods 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 description 3
- 238000005476 soldering Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920001721 polyimide Polymers 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
- H01F17/0006—Printed inductances
- H01F17/0013—Printed inductances with stacked layers
-
- 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
-
- 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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
Abstract
A coil 10 includes a laminate 12 of a plurality of insulating sheets 14, on which a conductive pattern 18 as a winding part is formed. One end portion of the conductive pattern 18 is extended to the outside of the insulating sheet 14 and is formed as a protruding portion 18a. The protruding portion 18a is overlapped and bent and is formed as a terminal 24. The terminal 24 has a first portion 24a extended downward orthogonal to the main surface of the insulating sheet 14 on the outside of the insulating sheet 14, and a second portion 24b extended from the first portion 24a to a direction nearly parallel to the main surface of the insulating sheet 14. The terminals (24) may include dummy protruding portions (22). The laminate (12) may include a hole through which a core member may pass. <IMAGE>
Description
2272109 COIL The present invention relates to a coil, and particularly,
relates to a coil such a transformer which is mounted on a printed-circuit board and so on.
Fig. 6 is a perspective view showing an example of a conventional transformer which is a background of the present invention. The transformer 1 includes a winding part 2 consisting of a conductive wire. The winding part 2 is wound to a bobbin 3. Also, the end portions of the winding part 2 are respectively connected by winding and soldering to pin terminals 4 mounted into the bobbin 3.
Fig. 7 is a perspective view showing another example of a conventional transformer which is a background of the present invention. The transformer 5 includes a winding part 6 consisting of a plurality of conductive patterns. These conductive patterns are respectively formed on main surfaces of a plurality of insulating sheets 7 laminated. Meanwhile, these conductive patterns are connected to each other via a through-hole formed through the insulating sheet 7 if necessary. Then, each end portions of the winding part 6 are 1 ri pggtlyi,Iy tQ iach pin terminalB 9 mounted into a terminal base 8 for supporting the insulating sheets 7 from under.
In the transformer 1 shown in Fig. 6, the bobbin 3 and the pin terminals 4 as separate parts are necessary and labor for connecting the end portions of the winding part 2 to the pin terminals 4 is necessary, thereby the cost is high. Meanwhile, there is a method wherein a winding part is formed with a conductive wire having a self-fusion-adhesion and end portions of the winding part as terminals are connected to the other circuit so that a bobbin and terminals as separated parts are unnecessary, however, in such a method, it is difficult to connect the end portions of the winding part consisting of the conductive wire to the other circuit.
Also, in the transformer 5 shown in Fig. 7, though a bobbin as a separate. part is unnecessary, the pin terminals 9 as separate parts are necessary, thereby the cost is high..
Furthermore, in the transformers shown in Fig. 6 and Fig. 7, for mounting on a printed-circuit board, holes for inserting the pin terminals must be formed through the printed-circuit board, respectively.
It is therefore a primary object of the present 2 z invention to provide a coil wherein a terminal as a separate part is unnecessary and can be mounted on a surface of a printed-circuit board.
A coil according to the present invention includes a plurality of insulating sheets laminated, and a winding part consisting of a conductive pattern formed on a main surface of the insulating sheet, wherein an end portion of the conductive pattern has a first portion extended to a direction intersectional to the main surface of the insulating sheet in the outside of the insulating sheet, and a second portion extended from the first portion to a direction nearly parallel to the main surface of the insulating sheet.
When mounting the coil on a printed-circuit board, the second portion of the end portion of the conductive pattern as the winding part is connected to an electrode on the printed-circuit board. That is, the end portion of the conductive pattern as the winding part operates as a terminal.
According to the present invention, since the end portion of the conductive pattern as the winding part operates as the terminal, a terminal as a separated part is unnecessary, it is possible to -reduce material and labor costs.
Furthermore, a coil which can be mounted on a printed- 3 01EGUIt Dgarg gail 9 qkilflvgl The above and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the embodiments with reference to the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a perspective view showing one embodiment of the present invention.
Fig. 2 is a side view showing the embodiment of Fig. 1.
Fig. 3 is an exploded view showing the embodiment of Fig. 1.
Fig. 4 and Fig. 5 are plan views showing a conductive pattern as a winding part used in the embodiment of Fig. 1 and so on.
Fig. 6 is a perspective view showing an example of a conventional transformer which is a background of the present invention.
Fig. 7 is a perspective view showing another example of a conventional transformer which is a background of the present invention.
Fig. 1 is a perspective view showing one embodiment of the present invention, Fig. 2 is a side view showing the embodiment of Fig. 1, and Fig. 3 is an exploded view showing the embodiment of Fig. 1. The coil 10 includes a laminate 4 z 12. The laminate 12 is formed by laminating a plurality of rectangular insulating sheets 14. As these insulating sheets 14, an insulating material such a polyimide plate of 25 um is used. In centers of these insulating sheets 14, for example, a rectangular hole 16 for inserting a core is formed, respectively.
In the embodiment, since a conductive pattern as a winding part and so on are similarly formed on one main surfaces of the plurality of insulating sheets 14, a pair of insulating sheets 14 laminated and so on are particularly described in detail.
On one main surface of the upper insulating sheet 14 of a pair of insulating sheets 14 laminated, as shown in Fig. 4, a spiral conductive pattern 18 as a winding part is formed around the hole 16. One end portion of the conductive pattern 18 is drawn to the outside of one end of the insulating sheet 14 in the direction y, and is formed as a take- out portion 18a. Also, the other end portion 18b of the conductive pattern 18 is formed so as to cover a throughhole 20 formed near by the hole 16 of the insulating sheet 14. Furthermore, on one main surface of the insulating sheet 14, many dummy take-out portions 22 are formed. These dummy take-out portions 22 are drawn from both ends of the insulating sheet 14 in the direction of the wide to the outside. Meanwhile, the conductive pattern 18 and the plural dummy take-out portions 22 are f ormed by a method such an etching or a printing at the same time.
Also, on one main surface of the lower insulating sheet 14 of a pair of insulating sheets 14 laminated, as shown in Fig. 5, a spiral conductive pattern 18 as a winding part is formed around the hole 16. One end portion of the conductive pattern 18 is drawn to the outside of the other end of the insulating sheet 14 in the direction y, and is formed as a take-out portion 18a. In this case, the take-out portion 18a of the conductive pattern 18 is formed on a place corresponding to the above one dummy take-out portion 22. Also, the other end portion 18b of the conductive pattern 18 is formed on a place corresponding to the above through-hole 20. Furthermore, on one main surface of the insulating sheet 14, many dummy take-out portions 22 are formed. In this case, these dummy take-out portions 22 are formed on places where corresponding to the above take-out portion 18a of the conductive pattern 18 and the above dummy take-out portions 22.
These insulating sheets 14 are laminated so as to overlap the take-out portions 18a of the conductive patterns 18 and the dummy take-out portions 22, the other end portions 18b of the two conductive patterns 18 are connected via the through-hole 20 by, for example, spot-welding. Thus, one winding part is formed between the take-out portions 18a 6 1 of the two conductive patterns 18 formed on the two insulating sheets 14.
Similarly, on one main surface of the other insulating sheet 14, a conductive pattern as the other winding part and many dummy take-out portions are formed. Meanwhile, on one main surface of the top insulating sheet 14, a conductive pattern and a take-out portion are not formed.
Then, the plural insulating sheets 14 are laminated so as to overlap the take-out portions 18a of the conductive patterns 18 and the dummy takeout portions 22, thereby the laminate 12 is formed.
Also, in the take-out portions overlapped, the center portions are bent to the under direction orthogonal to the main surface of the insulating sheet 14, the tip portions are bent to a direction nearly parallel to the main surface of the insulating sheet 14, and are joined by, for example, spot-welding, soldering or caUlking, thereby terminals 24 are formed, respectively. That is, the terminal 24 has a first portion 24a extended downward orthogonal to the main surface of the insulating sheet 14 in the outside of the insulating sheet 14, and a second portion 24b extended from the first portion 24a to the outside direction nearly parallel to the main surface of the insulating sheet 14. Also, the second portion 24b of the terminal 24 is formed so as to form a plane with its bottom and a bottom of a bottom core 26b.
7 Furthermore, in top and bottom of the laminate 12, cores 26a and 26b are disposed. The top core 26a includes a plate portion 28a having a main surface which the wide is smaller than the top of the laminate 12 and the length is longer than the top. In the plate porion 28a, on the center, a center leg portion 30 is formed so as to extend downward, on both ends in the direction of the length, outer leg portions 32a, 32a are formed so as to extend downward. Also, the bottom core 26b includes a plate portion 28b, on both ends in the direction of the length of the plate portion 28b, outer leg portions 32b, 32b are formed so as to extend upward. Then, the laminate 12 is put on the bottom core 26b. And, the center leg portion 30 of the top core 26a is faced to the plate portion 28b of the bottom core 26b through the hole 16 of the laminate 12. At the same time, the outer leg portions 32a, 32a of the top core 26a faced to the outer leg portions 32b, 32b of the bottom core 26b. Meanwhile, the top and bottom cores 26a and 26b are fixed by winding adhesive tape around them.
The coil 10 can be surface-mounted on a printed-circuit board by soldering the second portion 24b of the terminal 24 to an electrode on the printed-circuit board. In this case, in the coil 10, as the end portion of the conductive pattern 14 as the winding part operates as a terminal, a terminal as a separate part is unnecessary.
8 z iz Furthermore, in the coil 10, since the bottoms of the second portions 24b of the terminals 24 and the bottom of the bottom core 26b exist in the same plane, and the bottoms of the terminals 24 and the bottom of the bottom core 26b can touch. on the surface of the printed-circuit board, it can be firmly mounted an the printed-circuit board.
Also, when the coil of the embodiment is used as a transformer, since the end portion of the conductive pattern is directly connected to the electrode on the printedcircuit board, heat produced during operation of the transformer can be radiated via the printed-circuit board.
Meanwhile, though the dummy take-out portion 22 is overlapped with the take-out portion 18a consisting of the one end portion of the conductive pattern 14 in the above embodiment, any dummy take-out portion 22 may be not formed. In this case, the terminal 24 associated with the conductive pattern 18 is constituted with only the take-out portion 18a of the conductive pattern 18.
Also, though the second portion 24b of the terminal 24 is bent to the outside direction in the above embodiment, the second portion 24b of the terminal 24 may be bent to the inside direction.
Furthermore, though the bottoms of the second portions 24b of the terminals 24 and the bottom of the bottom core 26b exist in the same plane in the above embodiment, it is 9 unnecessary to form these bottoms in the same plane.
Furthermore, though the terminals 24 are formed both sides of the laminate 24 in the direction of the wide in the above embodiment, the terminals 24 may be formed only one side of the laminate 12 or four sides thereof.
Also, though the coil of the above embodiment has plural winding parts and can be used as a transformer, in the present invention, the number of the winding part may be only one. Meanwhile, when having plural winding parts, the winding parts may be connected in series or in parallel, via a though-hole formed through the insulating sheet14 and so on.
Also, though the center leg portion 30 is formed on only one core 26a in the above embodiment, center leg portions may be formed both cores 26a and 26b.
It will be apparent form the foregoing that, while the present invention has been described in detail and illustrated, these are only particular illustrations and examples, and the present invention is not limited to these.
The present invention - is limited only by the appended claims.
Claims (7)
1. A coil including:
plurality of insulating sheets laminated; and winding part consisting of a conductive pattern formed on a main surface of said insulating sheet, wherein an end portion of said conductive pattern has a f irst portion extended to a direction intersectional to the main surface of said insulating sheet in the outside of said insulating sheet, and a second portion extended from said first portion to a direction nearly parallel to the main surface of said insulating sheet.
2. A coil according to claim 1, wherein a hole is formed through said plurality of insulating sheets, and a core is inserted into said hole.
3. A coil according to claim 2, wherein said second portion is formed so as to form a plane with its bottom and a bottom of said core.
4. A coil according to claim 1, wherein a dummy takeout portion is formed on the main surface of said insulating sheet, said dummy take-out portion is overlapped with said end portion of said conductive pattern.
5. A coil according to claim 4, wherein a hole is formed through said plurality of insulating sheets, and a core is inserted into said hole.
11
6. A coil according to claim 5, wherein a portion laminated said second portion and said dummy take-out portion is formed so as to form a plane with its bottom and a bottom of said core.
7. A coil substantially as described herein by reference to any one of Figures 1 to 5.
12
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31783892A JP3409341B2 (en) | 1992-11-02 | 1992-11-02 | coil |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9322265D0 GB9322265D0 (en) | 1993-12-15 |
| GB2272109A true GB2272109A (en) | 1994-05-04 |
| GB2272109B GB2272109B (en) | 1997-01-22 |
Family
ID=18092620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9322265A Expired - Fee Related GB2272109B (en) | 1992-11-02 | 1993-10-29 | Coil |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3409341B2 (en) |
| DE (1) | DE4337054B4 (en) |
| GB (1) | GB2272109B (en) |
| TW (1) | TW230817B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0751623A1 (en) * | 1995-06-30 | 1997-01-02 | Carlo Gavazzi AG | Inductive proximity sensor |
| WO2023020957A1 (en) * | 2021-08-20 | 2023-02-23 | Biotronik Se & Co. Kg | Pcb transformer with integrated internal and external electrical contacting for automated manufacturing |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5469334A (en) * | 1991-09-09 | 1995-11-21 | Power Integrations, Inc. | Plastic quad-packaged switched-mode integrated circuit with integrated transformer windings and mouldings for transformer core pieces |
| BRPI0520516B1 (en) | 2005-06-20 | 2017-05-30 | Federico Neumann-Duran Herman | collapsible display module and method for manufacturing the display module |
| DE102013019023B4 (en) * | 2013-11-14 | 2015-11-19 | K.A. Schmersal Holding Gmbh & Co. Kg | Device for monitoring the state of an access protection device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1303913A (en) * | 1970-04-20 | 1973-01-24 | ||
| GB2044568A (en) * | 1979-03-13 | 1980-10-15 | Hull Corp | Construction of delay network |
| US4543553A (en) * | 1983-05-18 | 1985-09-24 | Murata Manufacturing Co., Ltd. | Chip-type inductor |
| US4873757A (en) * | 1987-07-08 | 1989-10-17 | The Foxboro Company | Method of making a multilayer electrical coil |
| EP0484558A1 (en) * | 1990-05-25 | 1992-05-13 | Murata Manufacturing Co., Ltd. | High frequency coil and method of manufacturing the same |
| GB2260222A (en) * | 1991-10-03 | 1993-04-07 | Murata Manufacturing Co | Flat coils |
-
1992
- 1992-11-02 JP JP31783892A patent/JP3409341B2/en not_active Expired - Fee Related
-
1993
- 1993-10-29 DE DE19934337054 patent/DE4337054B4/en not_active Expired - Fee Related
- 1993-10-29 GB GB9322265A patent/GB2272109B/en not_active Expired - Fee Related
- 1993-10-30 TW TW82109145A patent/TW230817B/zh not_active IP Right Cessation
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1303913A (en) * | 1970-04-20 | 1973-01-24 | ||
| GB2044568A (en) * | 1979-03-13 | 1980-10-15 | Hull Corp | Construction of delay network |
| US4543553A (en) * | 1983-05-18 | 1985-09-24 | Murata Manufacturing Co., Ltd. | Chip-type inductor |
| US4873757A (en) * | 1987-07-08 | 1989-10-17 | The Foxboro Company | Method of making a multilayer electrical coil |
| EP0484558A1 (en) * | 1990-05-25 | 1992-05-13 | Murata Manufacturing Co., Ltd. | High frequency coil and method of manufacturing the same |
| GB2260222A (en) * | 1991-10-03 | 1993-04-07 | Murata Manufacturing Co | Flat coils |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0751623A1 (en) * | 1995-06-30 | 1997-01-02 | Carlo Gavazzi AG | Inductive proximity sensor |
| WO2023020957A1 (en) * | 2021-08-20 | 2023-02-23 | Biotronik Se & Co. Kg | Pcb transformer with integrated internal and external electrical contacting for automated manufacturing |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3409341B2 (en) | 2003-05-26 |
| DE4337054A1 (en) | 1994-05-05 |
| TW230817B (en) | 1994-09-21 |
| JPH06151178A (en) | 1994-05-31 |
| DE4337054B4 (en) | 2007-03-01 |
| GB9322265D0 (en) | 1993-12-15 |
| GB2272109B (en) | 1997-01-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20111029 |