DE10058295A1 - Coil formers manufactured in stamping technology for use in electronic circuits - Google Patents

Abstract

The invention relates to a coil body and to a method for producing the same. The aim of the invention is to provide coils that can be produced using simple means and that are especially suitable for use in electronic circuits. To this end, the coils are produced by punching and shaping a base. The inventive method allows production of coils with high geometric reproducibility, adjustable inductivities and high mechanical stability.

Description

The present invention relates to bobbins, in particular in electronic circuits are used.

So far, coils have been used in electronics, either as on Lei printed inductance loops or lacquer-coated Metal wire to be wrapped. Coiled coils are difficult to manufacture, by removing the paint insulation before soldering, depending is not yet tinned and is a connection for the usual wave soldering process risk. Furthermore, the geometry of the coil can only be uncertain can be set because, for example, fluctuations in wire diameter telbar affect the coil length and thus the inductance of the coil.

These and other process uncertainties lead to inductances of the products cannot be manufactured precisely and as a result in the process by ver bend the contour must be adjusted.

A major innovation is now that instead of wound coils coils are produced according to the invention, which from a stamping process flat metal tape, which can already be tinned.

The punch contours and embossings have a high geometric reproduction decorability and therefore precisely determinable and adjustable inductors make subsequent adjustment superfluous or easier.

Since the punched coil is also mechanically more stable, mechanical influences such as movements of the electronic device will cause the coil to generate less mechanical vibrations, which can usually be found in periodic changes in the electrical characteristics of the coil. Furthermore, by means of tab-like bobbin extensions, as indicated at position 4 in FIG. 1, it is also possible to mechanically attach the bobbin to an electronic circuit board and, if desired, to tap electrical voltages at these positions, which is impossible in the case of the winding bobbins. This tapping enables additional circuitry options to be implemented within the electronic circuit board layout.

The punched spool can be used as a loose component as well as strapped to the car be taken from the customer.

Furthermore, it is possible for the bobbins thus produced to be mechanical components such as small and miniature springs.  

Based on the accompanying drawings in Fig. 1 to Fig. 3, the coils according to the Invention are illustrated and illustrated schematically using examples of preferred embodiments.

Fig. 1 shows a flat stamped part for forming from flat metal band ( 1 ) which is prepared for stamping. In the next step of the process, whoever within a punching process at the positions ( 2 ) in the punching strip alternates between the flat strip areas, e.g. B. 2 a in the plane shown and the areas 2 b pressed or pulled out of the plane. The result is an inventive bobbin as shown in ( 3 ). ( 4 ) optionally shows a bobbin extension which, as already discussed, can be used for mechanical stabilization or for further processing of electronic signals.

Fig. 2 shows another embodiment for forming a prepared flat metal strip ( 5 ) analogous to Fig. 1. The special feature here is the already semicircular arrangement of the flat strip areas ( 6 a) and ( 6 b). The areas ( 6 a) and ( 6 b) are now not pressed or pulled into the display plane or out of the plane, but instead are rotated about the axes of rotation ( 6 ) alternately perpendicular to the display plane in the stamping process. The result is a coil former according to the invention as indicated in ( 7 ).

In Fig. 1 and Fig. 2, the coil length between ( 11 ) and ( 12 ) after the punching process has been preserved. Another embodiment for reshaping a prepared flat metal strip ( 8 ) is shown in FIG. 3. An angle around the bending edges ( 9 ) reduces the distances between ( 13 ) and ( 14 ) to the shorter distances between ( 15 ) and ( 16 ) of the punching result ( 10 ) according to the invention.

LIST OF REFERENCE NUMBERS

1

prepared flat metal tape

2

printing positions

2

a Band area / pressure in the plane

2

b Band area / print out of level

3

bobbins

4

additional tab

5

prepared flat metal tape

6

rotational axes

6

a Belt area / turning into plane

6

b Belt area / turning out of plane

7

bobbins

8th

prepared flat metal tape

9

bending positions

10

bobbins

11

Stanzkörper- / coils start

12

Stanzkörper- / coil end

13

Punch body beginning

14

Punch body end

15

coils start

16

coil end

Claims (6)

1. Process for the production of bobbins by the process steps stamping and forming a base body is marked. 2. The method according to claim 1, characterized in that both me mechanical pressure as well as mechanical torsion to form a Base body can be used. 3. coil former for use in electronic circuits, thereby ge indicates that they are made with the help of conventional, from the punching and Fine stamping technology, known equipment can be produced. 4. Bobbin according to claim 3, characterized in that one or several fastening tabs are available, with which mechanical and electrical connection primarily to component-carrying, electronic base plates is made possible. 5. bobbin according to claim 3 and 4, characterized in that they have additional tabs ( 4 ) which provide mechanical stiffening and electronic contacting on the bobbin. 6. bobbin according to claim 3, 4 and 5, characterized in that they both as a loose component as well as strapped especially for automati can be produced during further processing.