JP2010122012A5

JP2010122012A5 -

Info

Publication number: JP2010122012A5
Application number: JP2008294722A
Authority: JP
Filing date: 2008-11-18
Publication date: 2012-10-11
Anticipated expiration: 2028-11-18

Description

本発明の基板形複層コイルは、導電部を渦巻状に形成して成る面状のコイルを渦巻の中心線方向へ複層に設けた複層コイルと、フレキシブルプリント基板により構成され、隣接する前記コイル間に介在する絶縁層と、前記絶縁層に設けられ、全ての前記コイルを、電流の巻き方向が同一になるよう直列接続する導電路とを備えたものである。 The substrate-type multilayer coil of the present invention comprises a multilayer coil in which a planar coil formed by forming a conductive portion in a spiral shape is provided in multiple layers in the direction of the center line of the spiral, and a flexible printed circuit board, and is adjacent to it. An insulating layer interposed between the coils and a conductive path provided in the insulating layer and connected in series so that all the coils have the same winding direction .

上記のように構成された基板形複層コイルでは、渦巻状のコイルを複層に構成することにより、ターン数を多く確保し、かつ、コイルが設けられる面領域の増大を抑制することができる。In the substrate-type multilayer coil configured as described above, by configuring the spiral coil in a multilayer, it is possible to secure a large number of turns and suppress an increase in the surface area where the coil is provided. .
また、絶縁層がフレキシブルプリント基板により構成されることにより、基板形複層コイル全体を、容易に、曲面状（典型的には円筒状）とすることができる。従って、例えば円柱状又は円筒状の物体の表面に沿わせるセンサを構成するには好適である。In addition, since the insulating layer is formed of a flexible printed board, the entire substrate-type multilayer coil can be easily curved (typically cylindrical). Therefore, for example, it is suitable for constructing a sensor along the surface of a columnar or cylindrical object.

また、上記基板形複層コイルにおいて、複層コイルは、隣接するコイル同士では渦巻の巻き方向が互いに逆であり、導電路は、絶縁層に設けられたスルーホールに沿って形成され、コイルの内・外いずれか一方の巻端を、隣接する他のコイルの当該一方の巻端と接続することにより全てのコイルを直列接続するようにしてもよい。
この場合、隣接するコイル同士では渦巻の巻き方向が互いに逆であることにより、電流を、その巻き方向を変えずに隣接する２つのコイルに流すことができる。例えば一のコイルの外側の巻端から電流が流れ込むとすると、電流は例えば右巻きに渦の中心へ向かい、隣接する他のコイルに達すると、今度は、右巻きに渦の外側へ向かい、当該コイルの外側の巻端に達する。従って、電流は常に右巻きに流れ、右巻きのターン数が累積されることになる。これは、逆方向でも同様である。
また、この場合、隣接するコイル間を実質的に最短距離の導電路で繋ぐことができる。 Further, in the above-mentioned substrate type multilayer coil, the multilayer coil has the spiral winding directions opposite to each other between adjacent coils, and the conductive path is formed along a through hole provided in the insulating layer. All the coils may be connected in series by connecting either the inner or outer winding end to the one winding end of another adjacent coil .
In this case, since the winding directions of the spirals in adjacent coils are opposite to each other, a current can be passed through the two adjacent coils without changing the winding direction. For example, if current flows in from the outer winding end of one coil, the current goes to the center of the vortex, for example, right-handed, and when it reaches another adjacent coil, the current turns rightward to the outside of the vortex. Reach the outer winding end of the coil. Therefore, the current always flows in the clockwise direction, and the number of clockwise turns is accumulated. The same applies to the reverse direction .
In this case, adjacent coils can be connected by a conductive path having the shortest distance .

Claims

A multilayer coil in which a planar coil formed by forming a conductive portion in a spiral shape is provided in multiple layers in the direction of the center line of the spiral;
An insulating layer made of a flexible printed circuit board and interposed between the adjacent coils;
A board-type multilayer coil, comprising: a conductive path provided in the insulating layer and connected in series so that all the coils have the same current winding direction.

In the multilayer coil, adjacent coils have mutually opposite spiral winding directions,
The conductive path is formed along a through-hole provided in the insulating layer, and the winding end of either the inner or outer side of the coil is connected to the one winding end of another adjacent coil. The substrate type multilayer coil according to claim 1, wherein all the coils are connected in series.

The substrate-type multilayer coil according to claim 2, wherein the through holes penetrate all the insulating layers, and the through holes are arranged in one direction orthogonal to the center line direction .

A displacement sensor device for detecting a displacement of a metal detection object in a non-contact manner,
A coil formed by forming a conductive portion in a spiral shape in a multilayer in the direction of the center line of the spiral, and a multilayer coil in which the spiral surface faces the detection object;
An insulating layer interposed between adjacent coils;
A conductive path provided in the insulating layer and connecting all the coils in series so that the current winding direction is the same;
A signal processing circuit for extracting an output signal when an LC circuit constituted by an inductance of the multilayer coil and a capacitance appearing between the multilayer coil and the detection object is driven by an AC signal;
A displacement sensor device comprising: