Process for fixing a winding to an electronic circuit

• US 5,634,261 A
• Filed: 03/16/1995
• Issued: 06/03/1997
• Est. Priority Date: 02/25/1991
• Status: Expired due to Term

• Current Assignee: Assa Abloy AB
• Original Assignee: Ake Gustafson
• Inventors: Gustafson, Ake
• Primary Examiner(s): Vo, Peter
• Assistant Examiner(s): Nguyen, Khan
• Application Number:
  US08/404,994
• Time in Patent Office: 810 Days
• Field of Search: 29/605, 29/618, 29/760, 29/748, 29/33 F, 242/440, 242/443, 242/441.1, 242/441, 361/807, 361/748, 140/93 R
• US Class Current: 29/605
• CPC Class Codes: H01F 2027/065 Mounting on printed circuit boards
• CPC Class Codes: H01F 27/06 Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
• CPC Class Codes: H01F 41/076 Forming taps or terminals while winding, e.g. by wrapping or soldering the wire onto pins, or by directly forming terminals from the wire
• CPC Class Codes: H01F 41/10 Connecting leads to windings making electric connections in general H01R43/00
• CPC Class Codes: H01F 41/127 Encapsulating or impregnating encapsulating coil and core H01F41/005
• CPC Class Codes: Y10T 29/49071 by winding or coiling
• CPC Class Codes: Y10T 29/49087 with envelope or housing
• CPC Class Codes: Y10T 29/49096 with winding
• CPC Class Codes: Y10T 29/49144 by metal fusion
• CPC Class Codes: Y10T 29/5187 Wire working

Abstract

The fixing process according to the invention of a winding to one or more electronic circuits permits elimination of an important manufacturing step of the processes according to the prior art, whether the positioning, then the gluing or the precise fixing of the winding or of the core to be wound on the electronic circuit or circuits. By a suitable arrangement of the electronic circuit or circuits and of the possible core, independently of one another, on a holding tool according to the invention, a semi-finished product is obtained, also according to the invention, made up of said circuit or circuits and said winding, the mechanical connection between them being ensured solely by the copper wires producing, moreover, the electrical connecting between the two elements. The finished component according to the invention will be obtained by disposing the preceding semi-finished product on a support ensuring a permanent mechanical connection between the two elements.

Claims

1. A process for producing a winding and for fixing said winding to at least one electronic circuit, comprising the steps of:

placing at least one electronic circuit, comprising at least two accessible metal paths, on a holding tool;

directing a winding wire with guide means disposed on one face of said tool to a winding beginning position, the guide means positioning a first portion of the winding wire above a first metal path of the at least one electronic circuit when the winding wire is at the winding beginning position;

producing the winding with said winding wire;

directing the winding wire from a winding end position with said guide means, the guide means positioning a second portion of the winding wire above a second metal path of the at least one electronic circuit when the winding wire is brought from the winding end position;

electrically connecting the first and second portions of the winding wire situated above said first and second metal paths to the corresponding metal path; and

opening the tool and withdrawing the component, wherein said at least one electronic circuit is connected to each other and to the winding solely by the first and second portions of the winding wire being electrically connected to the metal paths of said at least one electronic circuit.

2. The process according to claim 1, wherein the winding is carried out with the aid of a flyer.

3. The process according to claim 1, wherein the winding is carried out about a core, held by said tool independently of said at least one electronic circuit.

4. The process according to claim 1, wherein the winding is carried out about a false core fixed to said tool.

5. The process according to claim 3, wherein the electrically connecting step is carried out when the metal paths are disposed in a plane parallel to an axis of the winding.

6. The process according to claim 5, wherein the step of withdrawing the component is effected by seizing one of the winding and a core around which the winding wire is wound.

7. The process according to claim 5, wherein the step of withdrawing the component is effected by seizing the at least one electronic circuit.

8. A holding tool for the execution of a process according to claim 1, wherein the holding tool comprises:

a first fixed nose; and

a second nose movable in relation to the first fixed nose, a space remaining between an opposing inner face of each of said noses when the second nose is placed in a close position relative to the first nose, said noses comprising;

first positioning means for positioning at least one electronic circuit placed adjacent a front end of the first nose, an upper surface of said at least one electronic circuit being flush with an upper surface of said first nose,

means for holding said at least one electronic circuit within said first positioning means,

second positioning and holding means for positioning and holding one of a coil core and a winding, wherein said first and second positioning means are positioned such that spaces remain between each of said at least one electronic circuit and between said one of said coil core and said winding and a closest one of the at least one electronic circuit which is closest to said one of the coil core and the winding; and

guide means for guiding a winding wire.

9. The holding tool according to claim 8, wherein the guide means comprises a first point disposed on a rear portion of the first nose of said tool and a second point disposed on a rear portion of the second nose of said tool to guide the winding wire above at least one first metal path of the at least one electronic circuit, then after the winding has been carried out, to guide the winding wire above at least one second metal path of said at least one electronic circuit.

10. The holding tool according to claim 8, wherein the guide means comprises a single point disposed on a rear portion of one of said first and second noses of said tool to guide the winding wire above at least one first metal path of the at least electronic circuit, then after the winding has been carried out, to guide the winding wire above at least one second metal path of said at least one electronic circuit.

11. The holding tool according to claim 9, further comprising second guide means for guiding the winding wire at an entry and an exit of the winding.

12. A holding tool for holding at least one electronic circuit for forming a winding and connecting the at least one electronic circuit to the winding, the holding tool comprising:

a first fixed nose; and

a second nose movable in relation to the first fixed nose, a space remaining between an opening inner face of each of said noses when the second nose is placed in a close position relative to the first nose, said noses comprising;

first positioning means for positioning at least one electronic circuit placed adjacent a front end of the first nose, an upper surface of said at least one electronic circuit being flush with an upper surface of said first nose,

means for holding said at least one electronic circuit within said first positioning means,

second positioning and holding means for positioning and holding one of the winding and a coil core around which the winding is formed, wherein said first and second positioning means are positioned such that spaces remain between each of said at least one electronic circuit and between said one of said coil core and said winding and a closest one of the at least one electronic circuit which is closest to the one of the coil core and the winding, and

guide means for guiding a winding wire.

13. The holding tool of claim 12, wherein the guide means guides the winding wire to and from a winding position where the winding is wound so that the winding wire is aligned with contact paths of the at least one electronic circuit.

14. The holding tool of claim 12, wherein the guide means comprises a first point disposed on a rear portion of the first nose of said tool and a second point disposed on a rear portion of the second nose of said tool to guide the winding wire above at least one first metal path of the at least one electronic circuit, then after the winding has been carried out, to guide the winding wire above at least one second metal path of said at least one electronic circuit.

15. The holding tool of claim 12, wherein the guide means comprises a single point disposed on a rear portion of one of said first and second noses of said tool to guide the winding wire above at least one first metal path of the at least electronic circuit, then after the winding has been carried out, to guide the winding wire above at least one second metal path of said at least one electronic circuit.

16. The holding tool of claim 12, further comprising second guide means for guiding the winding wire at an entry and an exit of the winding.