JPH0636930A - Electric device - Google Patents

Abstract

PURPOSE: To form, for low-cost manufacturing, an electric device such as a chip inductance-especially an air coil, harmonics chalk, transmitter, etc. CONSTITUTION: A chip inductance 1 comprises a coil 6 placed at a core part 2, while the core part 2 has undercut parts 7 and 8 in the range of end surfaces 3 and 4, while electric contact elements 9 and 10 are clamped/fixed or inserted into them. The contact elements 9 and 10 comprise a U-shaped curvature part 14 for accepting a coil end 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid core part made of a ferromagnetic or non-conductive material, especially ferrite, ceramics or a synthetic resin, and having a vertical prismatic three-dimensional shape, particularly a rectangular parallelepiped, a cube or a cylinder. A coil chamber which is stepped with respect to mutually parallel end faces of the core component and can be wound in a single layer or multiple layers, and a portion which is arranged in the end face range and which is used for winding the coil end and is conductively connected to the coil end. And an electrical device having an electrical contact element, in particular a chip inductance such as an air coil, a radio frequency choke or a transmitter.

[0002]

2. Description of the Prior Art An electric device of this kind is known from EP 0177759 B1. Here, the contact element is formed in the form of a plate and is held in a notch, such as a groove or slit, formed in the end face area of the core component.
The production of this type of core component with slit-like cutouts is very costly and thus the finished device is very expensive.

[0003]

SUMMARY OF THE INVENTION The object of the invention is to make a device of the type mentioned at the outset such that it can be manufactured inexpensively.

[0004]

According to the invention, the object is to provide an electrical device of the type mentioned at the outset, in which the end face of the core part has an undercut and the electrical contact element is clamped in it. It is solved by embedding or embedding. Advantageous embodiments of the electrical device according to the invention are described in the subclaims.

[0005]

The present invention will be described in detail with reference to the embodiments shown in the drawings.

A chip inductance 1 is shown in FIG. This chip inductance 1 has a solid core part 2 of a rectangular parallelepiped. The core component 2 is made of a magnetic material, in particular ferrite, for the production of high-frequency chokes, for example, but is made of a non-conductive material, in particular ceramics or synthetic resin, for the production of air coils, for example.

The core component 2 has a coil chamber 5 stepped with respect to end faces 3 and 4 which are parallel to each other, and a coil 6 having a chip inductance 1 is arranged in the coil chamber 5.

The end faces 3, 4 of the core part 2 have undercuts 7, 8 in which the planar electrical contact elements 9, 10 are clamped or fitted. The contact elements 9, 10 are additionally attached to the end faces 3, 4 of the core part 2 by means of adhesive layers 11, 12 in order to aid in their fixing.

The contact elements 9, 10 are in the area of the end faces 3, 4,
Used for winding the coil end 13 and the end face 3,
U protruding from the contact elements 9, 10 in the range of 4
It has a character-shaped curved portion 14.

The coil end 13 has a curved portion 14 during the winding process.
Fixed in a sandwich inside. Then coil end 1
3 is welded to the contact elements 9, 10.

This welding takes place on the edges of the contact elements 9, 10. The reason is that on the one hand the residual wire is melted together and on the other hand the melt is formed such that the coil end 13 is embedded in the melt without changing its cross-sectional area.
The welding process is carried out so that the parts to be welded and the laser welding device, for example, are precisely aligned by welding so that, for example, the parts to be welded and the laser welding device are They are synchronized with each other so that the welding is carried out at the desired points.

After the coil is manufactured and the coil end 13 is welded, the chip inductance is provided with a case 15 made of a synthetic resin such as an epoxy resin. If shielding is desired, finely distributed carbonyl iron particles or ferrite particles are placed in the case 15.

After the case 15 is manufactured, the planar terminals 16, 17 of the electrical contact elements 9, 10 are bent over the case 15. In order to minimize the dimension of the chip inductance, the case 15 is provided with notches 18, 19 for accommodating the terminals 16, 17 of the contact elements 9, 10.

When the chip inductance is produced without a case, an enamel copper wire coated with an insulating paint having a particularly high heat resistance is used for the coil 6 in order to ensure the required brazing strength.

[Brief description of drawings]

1 is a cross-sectional view of a chip inductance constructed according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 chip inductance 2 core parts 3, 4 end surface 5 coil chamber 6 coils 7, 8 notch 9, 10 contact element 11, 12 adhesive 13 coil end 15 case

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Herbert Basiyuki, Federal Republic of Germany 8889 Jirgen Shiyutain-Landhausen Ringsshutraße 8 (72) Inventor, Leo Kienzle, Germany 7913 Zenden Kirchhenwäck 10 d (72) Inventor Kurt Mart Germany 7920 Heidenheim Lango Baldenvejk 6 (72) Inventor Wilfried Sierra Germany 8451 Rieden Zoyloerweke 4

Claims (5)

[Claims] 1. A solid core part (2) made of a ferromagnetic or non-conductive material, especially ferrite, ceramics or synthetic resin, in the form of a vertical prism, particularly in the shape of a rectangular parallelepiped, a cube or a cylinder, and a core part. A coil chamber (5) that can be wound in a single layer or in multiple layers and is stepped with respect to the end faces (3, 4) parallel to each other, and is arranged in the end face range and is determined for winding the coil end (13). In an electrical device (1) having an electrical contact element (9, 10) with conductively connected parts, the end faces (3, 4) of the core part (2) are undercut (7, 8) An electrical device, characterized in that it has an electrical contact element (9, 10) clamped or fitted therein. 2. Clamped or fitted electrical contact elements (9, 10) are additionally secured to the end faces (3, 4) of the core part (2) by means of an adhesive (11, 12). The electric device according to claim 1, wherein: 3. The electric device according to claim 1, wherein the coil (6) is made of an enameled copper wire coated with a high heat resistant insulating paint. 4. The electrical device according to claim 1, further comprising a case (15). 5. The electric device according to claim 4, wherein the case (15) is made of an insulating material containing carbonyl iron and / or ferrite for shielding.