JP3054669U - Inductance device - Google Patents

Abstract

(57) [Problem] To reduce the size, thickness, and height of an inductance device using a rectangular wire coil, and to ensure alignment and fixation of two magnetic pieces. A flat coil is formed by winding a flat metal wire so that a wide surface thereof is substantially perpendicular to a winding direction. The coil 1 is closed by the magnetic pieces 3a, 3b by being inserted through the concave notches 4a, 4b of the magnetic pieces 3a, 3b,
The magnetic core 2 composed of the magnetic pieces 3a and 3b was fitted and locked in a through hole 6 provided in a frame-shaped base 5.

Description

[Detailed description of the invention]

[0001]

[Usage field to which the invention belongs]

 The present invention relates to a low-profile inductance device using a rectangular metal wire.

[0002]

[Prior art]

 In recent years, as electronic devices have become smaller and lighter, inductance devices have also been required to be smaller, thinner and thinner.In particular, power supply devices for electronic devices have been required to be able to pass a relatively large current in addition to these conditions. You. In this type of inductance device, a rectangular metal wire is used as a winding material to satisfy the above requirements. FIG. 4 shows an example of a conventional inductance device using a flat metal wire, where 1 is a flat coil wound so that the wide surface of the flat metal wire is substantially at a right angle, and 2 and 3 are the coils 1 and 2, respectively. The coil 1 sandwiched between the E-shaped cores is fixedly mounted on a base 4. Reference numeral 5 denotes a terminal for drawing out the coil 1. The inductance device thus configured is mounted on the circuit board 6.

[0003]

[Problem to be solved]

 However, in the above configuration, since the coil 1 is open in the direction perpendicular to the magnetic legs of the E-shaped core, the leakage magnetic flux to the outside increases, and there is a disadvantage that the magnetic effect is adversely applied to the surrounding electronic components. is there. In an inductance device having a small external dimension, the misalignment of the joint surface of the core is important because there is a fear that the characteristics may fluctuate. However, in the above configuration, the E-type cores 2 and 3 are adhered by the adhesive 7 or the like. There is a disadvantage that the alignment of the joining surface is difficult and the workability is poor. An object of the present invention is to solve the above-mentioned conventional problems and to provide an inductance device that is small, thin, and low-profile, and that can flow a relatively large current.

[0004]

[Means for Solving the Problems]

 The present invention solves the above-mentioned conventional problems by providing a flat coil formed by winding a rectangular metal wire so that a wide surface is substantially perpendicular to a winding direction, and a flat coil having an E-shaped cross section. In an inductance device having a bottom cylindrical shape, a magnetic core formed by two magnetic pieces having a concave notch formed in an outer peripheral portion of an opening, and a frame-shaped base to which the magnetic core is attached, the inductance device includes: Is a through hole into which the magnetic core is inserted and held, a step provided on the inner periphery of the bottom of the through hole, the bottom outer periphery of the magnetic core is locked, and a terminal hole for inserting and fixing a terminal for drawing out the coil. The coil is closed by two magnetic pieces inserted and held in the through-holes, and the terminal of the coil is pulled out from the concave notch of each magnetic piece and inserted and fixed in the terminal hole of the base. And this configuration Reducing the leakage flux to the outside was thus could flow a large current while achieving thinning, the lower profile.

[0005]

Embodiment

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is an exploded perspective view showing an embodiment of the present invention, FIG. 2 is an explanatory view of a base, (a) is a top view, (b) is a bottom view, and FIG. 3 is an explanatory view of a magnetic core (a). ) Is a top view, (b) is a cross-sectional view taken along the line AA ′ in FIG. (A), and FIG. 4 is an assembly view with a part cut away. In the drawings, common parts are denoted by the same reference numerals and described. 1 is a flat coil formed by winding a flat metal wire so that the wide surface is substantially perpendicular to the winding direction, 1a and 1b are terminals for pulling out the coil 1, and 2 is a pair of two magnetic pieces 3a and 3b. The magnetic core is a combination of magnetic cores. Each magnetic piece is flat and has a bottomed cylindrical shape in which a central magnetic leg and an outer magnetic leg are concentrically arranged. There are provided recessed portions 4a and 4b for pulling out 1b. Reference numeral 5 denotes a frame-shaped base, a through hole 6 for inserting and holding the magnetic core 2, and a stepped portion 7 provided on the inner periphery of the bottom of the through hole so that the outer periphery of the bottom of the magnetic core 2 abuts and locks. And a terminal hole 8 formed in a frame-shaped peripheral portion, and the terminal terminals 1a and 1b of the coil 1 are inserted into and fixed to the terminal hole 8.

Next, an assembling process of this configuration will be described. First, when the magnetic piece 3 a is inserted into the through hole 6 of the base 5, the outer periphery of the bottom abuts on and is locked by the step 7 provided on the inner peripheral edge of the through hole 6. Next, the coil 1 is mounted between the center magnetic leg and the outer magnetic leg of the magnetic piece 3a, and one of the drawn terminals 1a is inserted into the terminal hole 8 provided on the edge of the base 5 through the concave notch 4a. It is fixed, and the other drawer terminal 1b is inserted and fixed in another terminal hole. Next, the magnetic piece 3b is placed over the core piece 3a so that the position of the concave notch 4b is aligned with the position of the terminal 1b, and the magnetic piece 3b is fixed to the magnetic piece 3b. At this time, the extraction terminals 1a and 1b of the coil 1 are locked by the concave portions 4a and 4b of the magnetic pieces 3a and 3b, respectively. In addition, the magnetic core 2 and the base 5 are fixed as needed with an adhesive or the like.

[0007]

[Effect of the invention]

 As described above, in the present invention, since the coil 1 is closed by the magnetic core 2 formed by the magnetic pieces 3a and 3b, the leakage of magnetic flux to the outside can be reduced. Further, the alignment between the magnetic core 2 formed by the two magnetic pieces 3a and 3b and the coil 1 can be performed simply and reliably, so that the assembling work can be easily performed. Furthermore, since a rectangular metal wire is used, there is an effect that a relatively large current can be passed while miniaturization, thinning, and reduction in height are achieved.

[Brief description of the drawings]

1 is an exploded perspective view showing an embodiment of the present invention, FIG. 2 is an explanatory view of a base, (a) is a top view, (b) is a bottom view, and FIG. 3 is an explanatory view of a magnetic core (a). ) Is a top view, (b)
FIG. 4A is a sectional view taken along line AA ′ of FIG. 4A, and FIG. 4 is an assembly view with a part cut away. FIG. 5 is an explanatory view showing an example of a conventional inductance device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Coil 1a, 1b ... Pull-out terminal 2 ... Magnetic core 3a, 3b ... Magnetic piece 4a, 4b ... Depressed notch 5 ... Base 6 ... Through-hole 7 ... .Steps 78: Terminal holes

Claims (1)

[Utility model registration claims] 1. A flat coil formed by winding a flat metal wire so that a wide surface thereof is substantially perpendicular to the winding direction, a flat cylinder having a bottom and an E-shaped cross section, and an outer periphery of an opening. A magnetic core composed of two magnetic pieces having a concave notch in the portion,
In the inductance device, comprising a frame-shaped base on which the magnetic core is mounted, the base includes a through-hole in which the magnetic core is inserted and held, and a through-hole provided at an inner periphery of a bottom of the through-hole. A stepped portion where the outer periphery is locked and a terminal hole for inserting and fixing a coil extraction terminal are provided. The coil is closed by two magnetic pieces inserted and held in the through hole, and the extraction terminal is connected to each magnetic piece. An inductance device, wherein the inductance device is pulled out from a concave notch and inserted and fixed in a terminal hole of a base.