DE202017104818U1 - Anwickelpfosten - Google Patents

Abstract

An electrically conductive Anwickelpfosten (2a, 2b) for a coil (5) of an inductive sensor (1), characterized in that the electrically conductive Anwickelpfosten (2a, 2b) is angled to produce an electrically conductive connection to a circuit board (4).

Description

The present invention relates to an electrically conductive Anwickelpfosten according to the preamble of claim 1. Furthermore, the invention relates to an inductive sensor comprising at least one such Anwickelpfosten.

Inductive sensors are already known which comprise a bobbin, a circuit board and two Anwickelpfosten. The bobbin of the inductive sensor is usually constructed so that it can accommodate windings of a coil in a winding space. In addition, within the bobbin, a shell core - also called ferrite core - be housed to manipulate a magnetic field generated by the coil.

The board is used for electronic control and evaluation of the coil. In order to use the space efficiently, the board can be arranged upright on the bobbin.

The beginning and end of a coil wire of the coil may be wound around an Anwickelpfosten and anterminiert thereon, so that the coil wire is fixed in particular for the winding process.

These Anwickelpfosten - also called bobbin post - are mounted in known inductive sensors in the vicinity of the winding space on the bobbin. Known Anwickelpfosten have the shape of a straight pin. The beginning and end of the coil wire, after each fixed to a Anwickelpfosten still need to be connected to the board, for example by connecting both for the beginning and for the end of the coil wire in each case another wire the board with the Anterolster anterminierten coil wire.

The object of the present invention is therefore to provide an improved and simplified connection of a wound on the Anwickelpfosten coil wire with a circuit board of an inductive sensor.

The object is achieved by a Anwickelpfosten for a coil of an inductive sensor having the features of claim 1.

Thus, an electrically conductive Anwickelpfosten is provided for a coil of an inductive sensor, wherein the electrically conductive Anwickelpfosten is angled to make an electrically conductive connection to a circuit board.

Since the Anwickelpfosten is made of an electrically conductive material and is angled to make an electrically conductive connection to a circuit board, it is possible to connect both a beginning and an end of a coil wire directly via a Anwickelpfosten with a circuit board of the inductive sensor, without the need for another electrical wire connection or conduit.

An advantage here is the one-piece design of the electrically conductive Anwickelpfostens that acts simultaneously as an electrical connection element to the board. This design is not only inexpensive and easy to manufacture, but also acts to support the board, so that the entire structure of the inductive sensor is more stable and durable compared to known inductive sensors. The Anwickelpfosten can either be angled in by having a kink or bow at an end facing the board or otherwise deviates from a straight pin shape, or alternatively be arranged to be attached as a straight pin in an angled manner obliquely to a bobbin to make an electrically conductive connection to the board.

According to an advantageous embodiment of the present invention, the electrically conductive Anwickelpfosten is double angled, so that it is approximately J-shaped. This embodiment is particularly suitable for a construction of an inductive sensor, in which both one or more Anwickelpfosten and the board stand upright on the bobbin and extend approximately parallel to each other. If the electrically conductive Anwickelpfosten double angled and J-shaped, a first leg of the angled portion of the Anwickelpfostens extend approximately at right angles from a central axis of the Anwickelpfostens towards the board. A second leg of the angled portion of the Anwickelpfostens may extend from the first leg of the angled portion of the Anwickelpfostens again approximately at right angles, so that the second leg in a plane of the board or directly in front of the board and runs parallel to the board, so that the second leg can be connected in a known manner to the circuit board, for example by soldering.

Alternatively, the electrically conductive Anwickelpfosten be angled so that it is Z-, L-, C-, U-, V- or I-shaped. The decisive factor here is that the electrically conductive Anwickelpfosten is angled in such a way that it extends in operation, so when it is installed in an inductive sensor, so towards a circuit board that he electrically conductive at a designated location with the board can be connected, for example by soldering.

According to another advantageous embodiment of the present invention, grooves and / or ridges are provided on an outer surface of the electrically conductive Anpfelpfostens to hold a beginning or an end of the coil wire of the coil of the inductive sensor.

In this case, grooves are recesses which project into a plane of the outer surface. Elevations, on the other hand, are discharges that protrude from the plane of the outer surface. Those skilled in the art know how to form grooves, ridges, or a combination of grooves and ridges to allow coil wire to wrap around the electrically conductive wrap post along the grooves and / or ridges on the outer surface of the electrically conductive wrap post, and therefore not closer on this arrangement consisting of grooves and elevations is received.

The grooves and / or elevations may guide the coil wire and prevent the coil wire from slipping. The grooves and / or elevations are preferably adapted to the coil wire, for example, by each groove and / or elevation is respectively removed by the diameter of the coil wire from the next groove and / or elevation, so that in each case one winding of the coil wire of each groove and / or increase is maintained and the windings are tightly secured together.

Preferably, the electrically conductive Anwickelpfosten in cross section on a first bending side and a parallel to the first bending side second bending side. In addition, the electrically conductive Anwickelpfosten also has a first side connecting the parallel bending sides and a second side connecting the parallel bending sides. Further preferably, the two sides connecting the parallel bending sides face each other.

According to another advantageous embodiment of the present invention, the grooves and / or elevations are provided only on the sides connecting the parallel bending sides of the outer surface of the electrically conductive Anwickelpfostens.

With such an arrangement of the grooves and / or elevations, the angled part of the Anwickelpfostens can be particularly easily produced by bending. Because when bending a profile around one with a substantially flat bending side, the material experiences the highest compressive stress at the inner bending radius, while the opposite material experiences the highest tensile stress at the outer bending radius on the other bending side.

If the grooves and / or elevations were thus arranged on the bending sides, which are then bent to the inner or outer bending radius, this would have the consequence - for example due to the notch effect of the grooves and / or elevations - that the stability of the Anwickelpfostens would be reduced or that even problems with clamping or bending could occur. Therefore, it is advantageous not to provide the grooves and / or ridges on the bending sides, but to arrange on the parallel bending sides connecting sides of the outer surface of the electrically conductive Anwickelpfostens, in the plane of the Anwickelpfosten is angled.

According to a further advantageous embodiment of the present invention, an inductive sensor is provided, which comprises a bobbin, a circuit board and at least one inventive electrically conductive Anwickelpfosten. The board is arranged upright on the bobbin. Also, the at least one electrically conductive Anwickelpfosten is arranged on the bobbin and extending from a located on the bobbin first end forth away from the bobbin, wherein a second end of the electrically conductive Anwickelpfostens is electrically connected to the board.

The first end can be cast into the bobbin, plugged, clamped, screwed or connected in other known manner with the bobbin. The coil wire is preferably wound on and anterminated at the first end of the Anwickelpfostens, but may also be wound and anterminiert at the second end of the Anwickelpfostens or over the entire length of the Anwickelpfostens. By connecting the second end of the Anwickelpfostens with the board also the stability and life of the inductive sensor is increased.

Preferably, a central axis of the electrically conductive Anwickelpfostens is arranged substantially parallel to a plane of the board and perpendicular to a winding plane of the coil.

In this case, the at least one electrically conductive Anwickelpfosten may extend from its first end substantially parallel to the board. The Anwickelpfosten can then be angled at its second end - preferably substantially rectangular - to the board and connected to the board.

According to a further advantageous embodiment of the inductive sensor, the electrically conductive Anwickelpfosten is double angled, so that the electrically conductive Anwickelpfosten is approximately J-shaped.

Alternatively, the electrically conductive Anwickelpfosten is angled such that the electrically conductive Anwickelpfosten Z-, L-, C-, U-, V- or I-shaped.

The shape of the Anwickelpfostens is to be chosen so that the Anwickelpfosten is connected at its first end to the bobbin and executed at its second end to the board and connected to the board.

According to an advantageous embodiment, the inductive sensor comprises two Anwickelpfosten, which are electrically connected to the circuit board.

It is also explicitly proposed to combine several features of the individual preferred embodiments with one another.

The present invention will be explained in more detail below with reference to the drawings, in which:

1a shows a Anwickelpfosten in the side view;

1b the Anwickelpfosten after 1a in the front view shows;

2a shows a section of an inductive sensor in a plan view; and

2 B the section of the inductive sensor 2 I show a partially sectioned side view.

In 1a is a wrap-around post 2a - Made of electrically conductive material and executed in one piece - shown. At a first end 21a can the wrap-around post 2a on a bobbin (in 1a not to be seen). The Anwickelpfosten 2a extends in a middle section 24 along a central axis 23 , This middle section 24 of the Anwickelpfostens 2a used for winding and anterminating coil wire (in 1a not to be seen). On an outer surface 20 of the Anwickelpfostens 2a are in this middle section 24 grooves 30 and raises 31 intended. Along these grooves 30 and raises 31 on the outer surface 20 of the electrically conductive Anwickelpfostens 2a can be coil wire around the electrically conductive Anwickelpfosten 2a wrap. The Anwickelpfosten 2a has in cross section two preferably parallel bending sides 27 . 28 on.

At a second end 22a is the electrically conductive Anwickelpfosten 2a bent so double that two legs 35 . 36 result. The first leg 35 the angled portion of the Anwickelpfostens 2a extends approximately at right angles away from the central axis 23 of the Anwickelpfostens 2a , The second leg 36 the angled portion of the Anwickelpfostens 2a is again perpendicular to the first leg 35 angled and extends approximately parallel to the central axis 23 of the Anwickelpfostens 2a so that the wrap-around post 2a is formed in approximately J-shaped. The second leg 36 could according to the invention also in the opposite direction relative to the first leg 35 be angled so that the Anwickelpfosten would be Z-shaped.

In 1b is the wrap-around post 2a in comparison to 1 90 ° around the central axis 23 rotated, giving an exemplary profile of grooves 30 and raises 31 for holding coil wire (in 1b not visible) becomes visible. The Anwickelpfosten 2a has two sides in cross section 25 . 26 on, across the bending side 27 and the in 1b unseen bending side 28 run. The two sides 25 . 26 lie opposite each other and connect the parallel bending sides 27 . 28 , The grooves 30 and / or increases 31 are just on both the parallel bending sides 27 . 28 connecting pages 25 . 26 the outer surface 20 of the electrically conductive Anwickelpfostens 2a intended.

In the 2a and 2 B is an embodiment of an inductive sensor 1 with a first wrap-around post 2a and a second wrap-around post 2 B shown. The Anwickelposts 2a and 2 B are identically constructed and J-shaped. It is also conceivable, however, an embodiment of an inductive sensor with two differently constructed Anwickelpfosten, for example with an I-shaped Anwickelpfosten and a J-shaped Anwickelpfosten.

In 2a it can be seen that the inductive sensor 1 a bobbin 3 and a board 4 includes. The board 4 is upright on the bobbin 3 arranged. The two electrically conductive Anwickelpfosten 2a . 2 B are also upright on the bobbin 3 arranged and are angled and over a first solder joint 41 and a second solder joint 42 electrically conductive with the board 4 connected so that a coil (in 2a not visible) can be electronically controlled and evaluated.

In 2 B it can be seen that in the bobbin 3 a coil 5 from many windings of coil wire 50 is arranged. A circular shape of the coil 5 defines a winding plane 54 from a coil centerline 55 is cut vertically.

A start 51 of the coil wire 50 as well as an end 52 of the coil wire 50 are each from a winding space of the bobbin 3 led out and are at a Anwickelpfosten 2a . 2 B wrapped and anterminiert.

The two wrap-around posts 2a . 2 B are upright on the bobbin 3 arranged and each extending from one on the bobbin 3 located first end 21a . 21b forth along a central axis 23 of the respective Anwickelpfostens 2a . 2 B , The central axes 23 the Anwickelpfosten 2a . 2 B each extend substantially parallel to a plane of the board 4 and perpendicular to the winding plane 54 the coil 5 ,

In the illustrated embodiment, the two Anwickelpfosten 2a . 2 B in the bobbin 3 plugged in. However, other known forms of attachment are conceivable. Furthermore, it can be seen that the respective second ends 22a . 22b the two wrap-around posts 2a . 2 B are angled so that the first leg 35 each to the board 4 lead, and the second leg 36 then at the solder joints 41 . 42 soldered to the board.

Thus, it will also be apparent how two Anwickelpfosten invention 2a . 2 B can be used to make an electrically conductive connection between the coil wire 50 the coil 5 and the board 4 manufacture.

Also, in accordance with the present invention, embodiments of the inductive sensor having only one leadframe angled toward the board are for either a beginning or end of a coil wire, or having more than two start and end coil ends for multiple coil wires. Thus, for example, 3, 4, 8, 10 or 18 Anwickelpfosten be attached to a bobbin of an inductive sensor and electrically connect a coil wire to a circuit board.

LIST OF REFERENCE NUMBERS

1

Inductive sensor

2a

Electrically conductive Anwickelpfosten

2 B

Electrically conductive Anwickelpfosten

3

bobbins

4

circuit board

5

Kitchen sink

20

Outer surface of the electrically conductive Anpfelpfostens

21a

First end of the electrically conductive Anwickelpfostens 2a

21b

First end of the electrically conductive Anwickelpfostens 2 B

22a

Second end of the electrically conductive Anwickelpfostens 2a

22b

Second end of the electrically conductive Anwickelpfostens 2 B

23

Central axis of the electrically conductive Anwickelpfostens

24

Middle section of the electrically conductive Anwickelpfostens

25

Side with grooves and elevations

26

Side with grooves and elevations

27

bending side

28

bending side

30

groove

31

increase

35

First leg

36

Second thigh

41

First solder joint

42

Second solder joint

50

coil wire

51

Beginning of the coil wire

52

End of the coil wire

54

Winding plane of the coil

55

Coil central axis

Claims (8)

Electrically conductive Anwickelpfosten ( 2a . 2 B ) for a coil ( 5 ) of an inductive sensor ( 1 ), characterized in that the electrically conductive Anwickelpfosten ( 2a . 2 B ) is angled to make an electrically conductive connection to a circuit board ( 4 ). Electrically conductive Anwickelpfosten ( 2a ) according to claim 1, characterized in that the electrically conductive Anwickelpfosten ( 2a . 2 B ) is angled twice, so that the electrically conductive Anwickelpfosten ( 2a . 2 B ) is approximately J-shaped or angled such that the electrically conductive Anwickelpfosten Z-, L-, C-, U-, V- or I-shaped. Electrically conductive Anwickelpfosten ( 2a . 2 B ) according to claim 1, characterized in that grooves ( 30 ) and / or increases ( 31 ) on an outer surface ( 20 ) of the electrically conductive Anwickelpfostens ( 2a . 2 B ) are provided to a beginning or an end of a coil wire of the coil ( 5 ) to keep. Electrically conductive Anwickelpfosten ( 2a . 2 B ) according to claim 3, characterized in that the electrically conductive Anwickelpfosten ( 2a . 2 B ) in cross-section comprises: a first bending side ( 27 ) and one to the first bending side ( 27 ) parallel second bending side ( 28 ), as well as a first the parallel bending sides ( 27 . 28 ) connecting page ( 25 ) and a second the parallel bending sides ( 27 . 28 ) connecting page ( 26 ), where the two are the parallel bending sides ( 27 . 28 ) connecting pages ( 25 . 26 ) are opposed to each other and that the grooves ( 30 ) and / or increases ( 31 ) only on the parallel bending sides ( 27 . 28 ) connecting pages ( 25 . 26 ) of the outer surface ( 20 ) of the electrically conductive Anwickelpfostens ( 2a . 2 B ) are provided. Inductive sensor ( 1 ), comprising a bobbin ( 3 ), a board ( 4 ) and at least one electrically conductive Anwickelpfosten ( 2a . 2 B ) according to claim 1, wherein the board ( 4 ) upright on the bobbin ( 3 ), wherein the at least one electrically conductive Anwickelpfosten ( 2a . 2 B ) on the bobbin ( 3 ) is arranged and from one to the bobbin ( 3 ) first end ( 21a . 21b ), wherein a second end ( 22a . 22b ) of the at least one electrically conductive Anwickelpfostens ( 2a . 2 B ) with the board ( 4 ) is electrically connected. Inductive sensor ( 1 ) according to claim 5, characterized in that a central axis ( 23 ) of the at least one electrically conductive Anwickelpfostens ( 2a . 2 B ) substantially parallel to the board ( 4 ) and perpendicular to a winding plane ( 54 ) of the coil ( 5 ) is arranged. Inductive sensor ( 1 ) according to claim 5, characterized in that the electrically conductive Anwickelpfosten ( 2a . 2 B ) is angled twice, so that the electrically conductive Anwickelpfosten ( 2a . 2 B ) is approximately J-shaped, or is angled such that the electrically conductive Anwickelpfosten ( 2a ) Z-, L-, C-, U-, V- or I-shaped. Inductive sensor ( 1 ) according to claim 5, comprising two wrapping posts ( 2a . 2 B ) connected to the board ( 4 ) are electrically conductively connected.

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