Method for fixing a winding to an electronic circuit

• US 20020189080A1
• Filed: 08/19/2002
• Published: 12/19/2002
• Est. Priority Date: 02/25/1991
• Status: Abandoned Application

• Current Assignee: ASSA Abloy East Europe AB (Assa Abloy AB)
• Original Assignee: ASSA Abloy East Europe AB (Assa Abloy AB)
• Inventors: Gustafson, Ake
• Application Number:
  US10/222,932
• Publication Number:
  US 20020189080A1
• Time in Patent Office: Days
• 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 of circuits (20) and of the possible core (23), independently of one another, on a holding tool according to the invention, a semi-finished product (2) 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 connection between the two elements.

The finished component according to the invention will be obtained by disposing the preceding semi-finished produced on a support ensuring a permanent mechanical connection between the two elements.

Claims

1. Process for producing a winding (24) and for fixing said winding to at least one electronic circuit (20, 20A, . . . ), characterized in that it comprises particularly the following steps:

placement of at least one electronic circuit comprising at least two accessible metal paths (21, 22, 21A, 22B, . . . ), on a holding tool (1),

bringing a winding wire (25) on one side of guide means (13;

17) disposed on one face of said tool, then above a first metal path (21, 21A, . . . ) of the electronic circuit or circuits,

producing the winding with said winding wire,

withdrawal of the winding wire above a second metal path (22, 22A, . . . ) of the electronic circuit or circuits, then by another side of said guide means (14;

17),

soldering each of the portions of wires situated directly above each of said metal paths to the corresponding metal path,

opening of the tool and withdrawal of the component made up of said electronic circuit or circuits connected to each other and to the winding solely by the two winding end wires soldered on the metal paths of said electronic circuit or circuits.

2. Process according to claim 1, characterized in that the winding is carried out with the aid of a flyer.

3. Process according to one of the claims 1 or 2, characterized in that the winding is carried out about a core (23;

26), held by said tool independently of said electronic circuit or circuits.

4. Process according to one of the claims 1 or 2, characterized in that the winding is carried out about a false core (16C) fixed to said tool.

5. Process according to one of the claims 3 or 4, characterized in that the soldered joints are carried out when the metal paths are disposed in a plane parallel to the axis of the winding.

6. Process according to claim 5, characterized in that the withdrawal of the component is effected by seizing the winding or the wound core.

7. Process according to claim 5, characterized in that the withdrawal of the component is effected by seizing at least one electronic circuit.

8. Holding tool for the execution of a process according to one of the preceding claims, characterized in

that it comprises

a first fixed nose (10) and a second nose (11) movable in relation to the first nose, a space (12) remaining between two inner faces (10A, 11A) of said noses when the latter are in close position,

said noses comprising

first positioning means (10, 10C;

10D) for at least one electronic circuit (20, 20A) arranged near the front en of the first nose (10), the upper surface of said electronic circuit or circuits being flush with the upper surface of said first nose,

means for holding (15, 11) said electronic circuit or circuits within said positioning means,

second positioning and holding means (10C, 11B;

16;

18) for a coil core (23;

26) or for a winding (24),

said first and second positioning means being arranged in such a way that a space remains between said electronic circuits and between the electronic circuit close to the coil core or to the winding and said coil core or said winding,

and guide means for a winding wire.

9. Holding tool according to claim 8, characterized in that the guide means are composed of a single point (17) disposed on a rear portion of a nose of said tool in order to guide the wire above one or more first metal paths of one or more electronic circuits, then after the winding has been carried out, above one or more second metal paths of said electronic circuit or circuits.

10. Holding tool according to claim 8, characterized in that the guide means are composed of a single point (17) disposed on a rear portion of a lose of said tool in order to guide the wire above one or more first metal paths of one or more electronic circuits, then after the winding has been carried out, above one or more second metal paths of said electronic circuit or circuits.

11. Holding tool according to one of the claims 9 or 10, characterized in that it further comprises other guide means (19, 26A) disposed at the entry and at the exit of the winding.

12. Component produced particularly in the course of a process according to one of the claims 1 to 7, characterized in that the electronic circuit or circuits an the winding are connected only by the ends of the winding wires soldered on the metal paths of said electronic circuit or circuits.

13. Component according to claim 12, characterized in that it is subsequently inserted into a glass tube (30) to be sealed there.

14. Component according to claim 12, characterized in that it is subsequently covered partially or totally by a fixing coating (34).

15. Component according to claim 12, characterized in that it is subsequently fixed on a rigid support (33).

16. Component according to claim 12, characterized in that it is subsequently placed between two portions (35A, 35B) of at least one thin sheet of synthetic material forming an envelope, the free edges (36) of said portions of sheet subsequently being sealed together.

17. Component according to claim 12, characterized in that a plurality of said components are disposed side by side, a free space subsisting between each of said components, between two parallel strips (35A, 35B) of a thin synthetic material, a sealing (36) of the two strips being produced about each of said components in order to form an envelope.

18. Component according Lo claim 17, characterized in that each component is separated from the others by cutting said strips along a line situated between two consecutive sealings disposed in said free space.

19. Component according to one of the claims 17 to 18, characterized in that its envelope comprises fixing means (37) disposed outside of the sealed part of the envelope.

20. Component according to claim 12, characterized in that the electronic circuit or circuits are forced back into the plane of the winding.

21. Component according to one of the claims 12 or 20, characterized in that the electronic circuit or circuits are forced back into the space disposed within the winding.

22. Component according to claim 20 or 21, characterized in that the component is intercalated between two sheets of synthetic material assembled together.

23. Component according to claim 12, characterized in that the electronic circuit or circuits are forced back against a flange of the winding core (26).

24. Component according to claim 23, characterized in that the electronic circuit or circuits are glued against the flange of the winding core.