EP1450379A2 - Component directly on telephone coil - Google Patents

Abstract

A coil arrangement for small electrical or electronic appliances having at least one miniature coil, where the coil connections (5,7) are joined directly at the coil (1) to one another, via a component/unit (9) a sub-assembly and/or a circuit. Independent claims are included for (a) a method for fabricating a coil arrangement and (b) for use of the coil arrangement.

Description

The present invention relates to a coil arrangement according to the preamble of claim 1, a method for Manufacture and uses of the coil assembly.

For small electrical devices, such as devices in particular Medical area, such as hearing aids very small electrical coils used. With hearing aids are so-called T-coils or Telecoil. These T-coils are used for example Hearing aids as inductors with parasitic effects considered and installed. This physical coil therefore has a quality factor Q and resonance frequency fres.

For the reception of remote control signals one wants for example the resonance frequency of typically Reduce 150kHz to the frequency of the transmission. This usually happens by means of one or more Capacitors parallel to the coil.

Especially in the small devices mentioned, such as For example, hearing aids, it is often impossible as a result the small size of the electronics or the size or Number of capacitors required, these in the To accommodate electronics assembly. The decade was enough not and another external capacitor was needed.

An object of the present invention is now to suggest one way, like an additional one Capacity in limited space in smallest electrical devices can be arranged.

In general, the task is generally at small electrical or electronic devices in the Electronics with at least one coil the number of internally components to be able to increase to to meet corresponding electronics requirements.

According to the invention, the object is achieved by means of a Solved coil arrangement according to the wording of claim 1.

It is suggested that a directly on or on the coil Component or circuit on the terminals of the coil is arranged to connect them together.

The coil preferably has solderable, radial connections, which are at a distance that an arrangement of the Component or circuit is possible.

According to a further embodiment, the connections are open at least one resting on or on the spool Print arranged, such as a Plastic plate with two pads on which one also the component or circuit, the two Connections are to be arranged.

For the component or the SMD (Surface Mounted Device) for example, it’s a capacitor, which is arranged on the end of a rod-shaped coil and is connected to both connections, which in turn, each with externally supplied connections, such as for example strands or wires are connected.

However, it is in accordance with the invention equipped coil, such as a so-called T-coil, not necessarily a cylindrical or rod-shaped coil, but of course that too Use of ring-shaped coils or otherwise suitably trained coils possible.

It is also possible that there are two or more cylindrical or rod-shaped coils, on whose Connections are arranged, for example, a capacitor is. It can also be coils attached to one Transformer are arranged or which are arranged concentrically are.

Further preferred variants of the Coil arrangement according to the invention are in the dependent Characterized claims.

A method of production is also proposed a coil arrangement according to the wording of claim 7.

It is suggested to start with the connections of the coil to lead to so-called connection pads and there determine how to solder, weld or to glue, then the component or circuit to arrange, by means of which the two connections of the coil be connected to each other, and finally externally supplied connections, such as strands or Wire the terminals of the coil to the pads connect. The component is preferably like that Capacitor soldered on both sides at the same time, while the strands or wires with the connections can be set individually on the pads.

The coil arrangement proposed according to the invention is especially suitable for use in a Electronics in small medical devices, such as for example in a hearing aid.

The invention will now be described by way of example and with reference to the attached figures explained in more detail.

Fig. 1

in Längsansicht schematisch eine erfindungsgemäss ausgebildete, zylinderförmige Spule,

Fig. 2

einen Ausschnitt aus der Spule von Fig. 1,

Fig. 3

eine weitere Ausführungsvariante einer ringförmigen Spule,

Fig. 4

eine schematische Illustration für das bessere Verständnis der vorliegenden Erfindung,

Fig. 5

zwei koaxial angeordnete, zylinderförmig ausgebildete Spulen,

Fig. 6

zwei kotoroidal angeordnete Spulen,

Fig. 7

zwei an Ankerschenkeln eines Transformatorkerns angeordnete Spulen und

Fig. 8

zwei konzentrisch angeordnete Spulen.

Show:

Fig. 1

schematically in longitudinal view a cylindrical coil designed according to the invention,

Fig. 2

1 shows a section of the coil from FIG. 1,

Fig. 3

another variant of an annular coil,

Fig. 4

4 shows a schematic illustration for a better understanding of the present invention,

Fig. 5

two coaxially arranged, cylindrical coils,

Fig. 6

two coils arranged co-toroidally,

Fig. 7

two coils arranged on armature legs of a transformer core and

Fig. 8

two concentrically arranged coils.

Figure 1 shows schematically a rod or in longitudinal plan view cylindrical coil, having a coil former 1 and turns attached to it 3. Of course it is an x magnification, in fact and truth is the case according to the invention proposed coils usually around very small coils in the On the order of a few, for example Millimeters in length. Face on the cylindrical Coil are the two connections 5 and 7 of the coil, for example via a capacitor 9 with each other connected. At the same time, the two connections are 5 and 7 connected to externally supplied connections 11 and 13.

The end face of the coil from FIG. 1 is shown in FIG Magnification shown, in which the two connections 5 and 7 can be seen, which on Connection pads 6 and 8 are guided, which in turn on a plate 4 are applied. The connections are open these preferably metallic pads, for example soldered. The two connections 5 and 7 are connecting the capacitor 9 arranged, and in addition to the Connection pads 6 and 8 are the external connections 11 and 13.

Of course it is the cylinder or rod-shaped coil according to Figures 1 and 2 only around an example, and also the use of the cylindrical bobbin is not absolutely necessary. Especially in the case of very small coils, coil turns are often made without appropriate bobbin used.

For example, it is also possible to have an annular coil or to use a so-called toroidal coil, as in figure 3 shown schematically. The annular coil 21 has Windings 23, which terminally connect the two connections 25 and 27, which in turn preferably Metal pads 26 and 28 are soldered, which pads on a plate 34, for example made of a polymer Material are glued on. The connections 25 and 27 are again via a capacitor 29, for example connected with each other. In addition there are the coil connections 25 and 27 with externally supplied connecting wires 31 or 33 connected.

Finally, in FIG. 4 is a schematic Illustration of the inventive concept represented by an the end face 42 of the coil 1, which is for example, a telephone coil or so-called T-coil can act, the two connection pads 43 and 45 arranged on which the connections of the coil turns are led are. The two connections are via a so-called Surface Mounted Device Capacitor (SMD) 49 connected with each other. From the outside to the two Connection pads 43 and 45 are lead wires or Wires 51 and 53.

The capacitor shown in Figures 1 to 4 is as proposed according to the invention, for reasons of space and due to advantageous packaging directly on the coil or T-coil soldered. For this purpose the T-coil needs the two have mentioned, solderable radial connections, which must of course be big enough and in the right place Have to be at a distance to accommodate the (SMD) capacitor to be able to. For technical production reasons or around Mounting the capacitor and connecting the external To simplify connections, as in Figures 1 to 4, proposed, so-called connection pads to arrange.

Of course, instead of that in FIGS shown capacitor any other component be arranged between the two connections, or even an additional circuit. Of course it is Arrange a component or circuit between the two connections of a small coil not on hearing aids limited, but small coils of the type described can also be used in remote control units, medical devices, etc., can be used. In addition to receiving inductive Signals in the sense of a so-called telephone coil can such coils are also used to produce higher ones Frequencies, for signal modulation, for generating smaller ones Inductors in hearing aids, etc. It is also possible Micro remote controls to control, for example Medical devices, arranged for example in one Wrist watch, in a finger ring, etc., with a to equip the coil arrangement defined according to the invention.

Another advantage of those defined according to the invention Coil arrangement is, for example, that several different coils, which have different natural resonances own, with the right capacity, always the same Resonances tuned and interchangeable on the same circuit be used.

Of course, several inductors can also be used the same or interconnected bobbins to be available. With reference to Figures 5 to 8 Examples are shown in which at least two Inductors are arranged on a coil former. So For example, Fig. 5 shows two coaxially arranged Inductors or coils 1, which are coaxial on one Coil bobbin 2 are arranged and which two each Have connections 5 and 7. These connections can, like shown in advance with reference to Figures 1 to 4, each via a component, such as a capacitor, be connected. For the sake of simplicity each only a hint of a capacitor 9 shown, which is analogous to the corresponding arrangements in Figures 2 and 3 with the connections of the coils Pads is connected.

Analogously, Fig. 6 shows two cotoroidally arranged Inductors or coils 23, which on a annular coil bobbin 22 are arranged. In turn the two coils 23 each have connections 25 and 27, which again about a component, like a circuit or a capacity that can be connected.

Fig. 7 shows two inductors or coils 61, each on one leg of a U-shaped anchor body 63 are arranged. The coils have 61 connections 65 and 67 on.

Finally, Fig. 8 shows two concentrically around one Coil body 73 arranged coils or inductors 71, each with connections 75 and 77. These connections too can in turn be a capacitor or an assembly wear.

With the help of FIGS. 5 to 8 it should be shown that several inductors or coils according to the invention appropriate components or assemblies can, of course, not only the invention remains limited to two coils or inductors, but also arranging three or more Inductors or coils is possible.

Claims (11)

Coil arrangement for small electrical or electronic devices, such as in particular for use in acoustics and / or in the medical field, comprising at least one small coil, characterized in that the coil connections (5, 7, 25, 27) directly on the coil (1, 21) via a Component (9, 29) an assembly and / or a circuit are interconnected. Arrangement according to claim 1, characterized in that the coil connections (5, 7, 25, 27) are arranged directly on or on the coil (1) on so-called connection pads (6, 8) via a component (9) and / or a circuit with one another are connected. Arrangement according to one of Claims 1 or 2, characterized in that the coil connections (5, 7, 25, 27) are fixedly arranged on one or more foils or platelets which are arranged on or on the coil and have so-called pads (6, 8) which Connections are connected to one another by means of a capacitor or a capacitor (9, 29) and to which pads external connections (11, 13, 31, 33) are supplied for the external connection of the coil. Arrangement according to one of claims 1 to 3, characterized in that a film or a plate (4, 34) is arranged directly on or on the coil (1, 21) in the region of the connections (5, 7, 25, 27), preferably consisting of a polymeric material on which plates, on the side facing away from the coil, so-called connection pads (6, 8, 26, 28), preferably made of a metal material, such as in particular an electrically conductive metal, are arranged, the connections ( 5, 7, 25, 27) of the coil are guided onto these pads and soldered onto them, and are connected to one another by means of a capacitor or a capacitor (9, 29), and to which pads external connections (11, 13, 31, 33) are supplied for external connection of the coil. Arrangement according to one of claims 1 to 4, characterized in that the at least one small coil is a cylindrical coil, with connections (5, 7) arranged on an end face (42), which connections are connected via a component, such as a capacitor or a capacity (9). Arrangement according to one of claims 1 to 3, characterized in that the smallest coil is an annular coil or a so-called toroidal coil, the two connections of the at least one coil (25) being arranged close to one another on the annular coil, such that their spacing is sufficient around a component or a circuit or assembly that connects the two connections can be arranged. Arrangement according to one of claims 1 to 6, characterized in that the component arranged between the connections is a capacitance or a capacitor, suitable for lowering the frequency of the remote control signals picked up by the coil. Arrangement according to one of claims 1 to 7, characterized in that two or more coils (1,21,61,71) are arranged on a coil body (2,22,63,73), the coil connections (5 , 7,25,27,65,67,75,77) directly on the coil via a component, an assembly and / or a circuit. Method for producing a coil arrangement according to one of Claims 1 to 8, characterized in that first the connections of the at least one small coil are fed as close as possible to one another on so-called connection pads arranged on or on a coil, then the two connections on the connection pads by means of a component or a circuit are connected to one another, and finally from externally supplied connections, such as wires or strands, to the coil connections on the pads, for example by means of soldering. Use of the coil arrangement according to one of the claims 1 to 8 for the recording of inductive signals or of High-frequency signals in hearing aids or devices for the Transmission of telecommunications signals. Use of the arrangement according to one of claims 1 to 8, such as remote control devices for the control of Hearing aids or medical devices.

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