JP2000100619A - Transformer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transformer equipped with a bobbin in which coils can be regularly wound, and the winding height of the coils can be made low. SOLUTION: A coil 2 is wound around a winding groove part 5 of a bobbin 1. The lead lines 3 of the coil 2 are wound around output terminals 6 provided so as to be erected on the edge face of the bobbin 1 so as to be connected. Ribs 4 for leading the lead lines 3 of the coil 2 are formed at the winding groove part 5. The projection and recession of the ribs 4 is used so that each lead line 3 can be hung from the ribs 4 so as to be led. The position of each rib 4 is arranged so that the lead lines 3 cannot be overlapped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transformer for winding a coil around a winding groove formed on a bobbin, and more particularly to a bobbin structure for suppressing the winding height of the coil and reducing its thickness.

[0002]

2. Description of the Related Art FIG. 4 is a front view showing a bobbin of a transformer according to a conventional example, and FIG. 5 is a sectional view taken along line BB of FIG. A coil (winding) 2 is wound around the winding groove 5 of the bobbin 1. The lead wire 3 of the coil 2 is connected to an output terminal 6 provided upright on the end face of the bobbin 1.

[0003]

In the above-mentioned conventional transformer, when a plurality of coils are wound around the same winding groove, the lead wires overlap, and the coil is wound on top of that. There has been a problem that the winding of the coil is easily disturbed and the alignment of the coil is lost.

[0004] Further, a gap is formed between the windings, and the winding height of the coil is increased, including that the linearity is not increased. Here, since it is impossible to control the height of the coil, it is necessary to secure the required height of the flange with a margin. This has hindered the thinning of the transformer.

The present invention has been made based on such a background, and provides a transformer having a bobbin capable of winding a coil in a line and keeping the winding height of the coil low. It is intended for that purpose.

[0006]

In order to achieve the above object, a first means is a transformer having a bobbin in which a coil is wound around a winding groove, and a coil lead wire is provided in a winding groove portion of the bobbin. Characterized in that ribs are provided for drawing out.

[0007] The second means is the first means,
The rib near the output terminal around which the lead wire of the coil is wound is arranged outside the center of the bobbin, and is arranged inside as the distance from the output terminal increases.

[0008] As described above, the present invention provides a bobbin structure in which the coils are arranged and wound and the coils are not wound on the lead wires by providing the ribs for leading the coil lead wires in the bobbin winding groove portions. I have.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing a bobbin of a transformer according to a first embodiment of the present invention, and FIG.
FIG. 4 is a cross-sectional view taken along a line A. A coil (winding) 2 is wound around the winding groove 5 of the bobbin 1. Lead wire 3 of coil 2
Are connected to an output terminal 6 provided upright on the end face of the bobbin 1.

In the present embodiment, the winding groove 5 is provided with a rib 4 for leading out the lead 3 of the coil 2. In FIG. 1, the ribs 4 are uneven in the vertical direction toward the drawing, and each of the leads 3 is hooked on the ribs 4 by using the unevenness. The positions of the ribs 4 are arranged so that the lead lines 3 do not overlap.

By providing the ribs 4 in the winding groove portion 5 in this manner, the coils 2 can be arranged and wound, and the coil height can be reduced. According to the present embodiment, the coil height can be reduced to a minimum, that is, twice as high as the wire diameter.

FIG. 3 is a front view showing a bobbin of a transformer according to a second embodiment of the present invention. In the present embodiment, the side near the output terminal 6 (the side from which the lead wire 3 is drawn).
The ribs 4 are arranged outside the center of the bobbin, and are arranged inside as the distance from the drawer side increases. By arranging the ribs 4 in this way, the lead wires 3 of each coil do not intersect, so that the winding height can be suppressed and the transformer can be made thin.

[0013]

As described above, according to the present invention, the winding height of the coil can be suppressed low, so that the transformer can be made thin.

[Brief description of the drawings]

FIG. 1 is a front view showing a bobbin of a transformer according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a front view showing a bobbin of a transformer according to a second embodiment of the present invention.

FIG. 4 is a front view showing a bobbin of a transformer according to a conventional example.

FIG. 5 is a sectional view taken along line BB of FIG. 4;

[Explanation of symbols]

 Reference Signs List 1 bobbin 2 coil 3 lead wire 4 rib 5 winding groove 6 output terminal

Claims (2)

[Claims] 1. A transformer having a bobbin in which a coil is wound around a winding groove, wherein a rib is provided in a winding groove portion of the bobbin for drawing out a lead wire of the coil. 2. The device according to claim 1, wherein the rib near the output terminal around which the lead wire of the coil is wound is arranged outside the center of the bobbin, and is arranged inside as the distance from the output terminal increases. Trance.