JPS59745Y2 - Trance - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a transformer in which a short ring can be positioned reliably and an insulation distance from a coil end or lead-out end can be uniformly secured regardless of the operator.

Generally, when applying a short ring around the circumferential direction of a transformer coil, the insulation distance between the axial edge of the short ring and the axial edge of the coil or lead wire should be maintained to meet the specifications. However, no conventional transformer has succeeded in providing this positioning means with a simple structure, and only skilled workers must take care to ensure that the short ring does not shift in the axial direction. I was working on it.

In view of this point, the main purpose of this proposal is to provide a transformer with a simple structure and a structure that allows positioning of the short ring without making the transformer unnecessarily bulky. As a result, a predetermined insulation distance can be secured without relying on people or using care, streamlining work, saving time, and reducing costs.

The illustrated embodiment of the present invention will now be described.

FIG. 1 shows a coil bobbin 1 which may be of any known type.

The coil bobbin 1 has a cylindrical portion 2 extending in the axial direction (vertical direction).
It has flanges 3 and 4 at its upper and lower ends, respectively, and in the one shown, terminal blocks 5, 5 are integrally provided on both sides of the lower flange 4, and a plurality of pin terminals 6... . . , and each pin terminal 6 is connected to a lead wire 7 of each partial coil of a coil wound around the cylindrical portion 2, which is generally made of a plurality of partial coil layers.

In the illustrated case, the entire coil obtained by winding up a plurality of partial coils is indicated by an imaginary line 8.

The present invention is characterized in that, in such a known coil configuration, a short ring positioning sheet member 9 is provided along at least one of the outer surfaces of the coil.

To explain this embodiment, in this case, the sheet member 9 includes a coil outer surface 8b on which the terminal blocks 5, 5 are provided,
A pair is applied to both outer surfaces 8a and 8a, which are orthogonal to 8b.

Each sheet member 9 is obtained by folding or thermoforming an insulating sheet material such as paper or plastic. It is cut out so as to include the necessary parts for each component, and then folded along bending lines a1 and a2.

Hereinafter, as shown by the imaginary line in FIG.
The structure of the sheet member will be explained while describing its relationship with the bobbin 1.

The sheet member 9 has a longitudinal portion 9a along the length direction of the coil 8, and the upper and lower ends of the sheet member 9 are provided with bending lines a1. By bending 90° at a2, the end pieces 9 come into contact with the end faces of the corresponding upper and lower flanges 3°4.
There is b, 9C.

These end pieces 9b and 9C serve as positioning pieces that prevent the sheet member 9 itself from shifting in the axial direction.

Next, as shown by the imaginary lines in FIG. 1, when the sheet member 9 is placed with the upper and lower positioning pieces 9b and 9C sandwiching both flange end faces from both sides, at least one side from the coil side surface 8a where the sheet member 9 is placed is placed between the upper and lower positioning pieces 9b and 9C. In this case, overhanging pieces 9d, 9d are provided on both sides of the longitudinal portion 9a, projecting to both sides and overhanging the side surface 8b perpendicular to the coil side surface 8a, and these overhanging pieces 9d, The position of the axially inwardly facing edge (in this case the upper edge) 10.10 of 9d is -
The reference plane is set at a position a predetermined distance l from the inner surface of the flange with the overhanging piece, in this case the flange 4.

This predetermined distance l is determined according to the required insulation distance between the axial end edge of the short ring and the same end edge of the coil or the lead wire, as will be described later.

Furthermore, in this embodiment, since the terminal blocks 5, 5 are perpendicular to the side surface to which the sheet I/member is attached, the leg portions 9e, 9e that come into contact with this inner surface are attached to the corresponding portions of the sheet member 9. horizontal direction (direction perpendicular to the axis) of the entire sheet member.
It also prevents misalignment.

However, in this embodiment, each flange 3, 4 is provided with a raised portion 3a, 4a having a surface that comes into contact with both side edges 9b', 9c' (slanted) of the upper and lower end pieces 9b, 9C. Since the positioning in the direction perpendicular to the axis is also achieved by this, the leg pieces 9e and 9e are not particularly required.

In any case, the sheet members 9,
After attaching the bobbin 9, the EI type core and the UI type cocoa core are attached to the bobbin 1 using the usual method.

In the illustrated case, the EI type coco core 11 is installed as shown in Figures 3 and 4, and as usual, the central leg piece of the E type core is connected to the solid axial through hole 15 of the bobbin 1 (Figure 1). The leg pieces on both sides extend along both sides of the coil 8 with the sheet members 9, 9 attached, and are short-circuited by a ■-shaped core on the end face side of either flange 3, 4. .

After that, the frame 12 and the bottom plate 1 are placed along the outer peripheral surface of each core portion.
Attach the bracket from 3 using a known method.

It should be noted that the present transformer is different from the usual conventional transformer in that the sheet member 9 is additionally inserted between the coil and the core leg piece, but due to its thinness,
This does not affect the core assembly or overall size in any way.

Note that once the core is installed, the sheet member 9 will be securely clamped and fixed, so in particular, the sheet member 9 should be fixed to the bobbin 1 in advance with an adhesive or the like using the flanges 3, 4, etc. There is no particular need to keep it.

When inserting the core into the bobbin, just hold it down a little with one hand.

However, you are free to use adhesive as necessary.

With the complete transformer structure as described above, short circuits and
When winding the ring 14, in the present configuration, the corresponding axial end edge 14a of the short ring 14 is placed around the upper edge 10 as a positioning edge of the overhanging piece 9d of the sheet member 9, and the winding is performed. , in this case, can be placed a certain distance l from the inner surface of the lower flange, and therefore even an amateur can position the rings 1 to 14 at predetermined axial positions, regardless of the operator's skill level. can.

As a result, the required insulation distance from, for example, the end face of the coil, the lead wire 7, the terminal 6, etc. can be stably obtained in accordance with the design specifications, and there is no fluctuation between products.

Moreover, in order to obtain such an effect, the simple structure of using the sheet member 9 that does not affect other parts of the transformer, is not bulky, and is inexpensive is itself one of the advantages. This is a great effect, and it also brings about the effect that the present invention can be applied to conventional transformers of existing needles to which the sheet member 9 of the present invention is not planned to be attached without changing the design.

The shape of the sheet member 9 can be freely deformed depending on the transformer used, but for example, the upper and lower positioning pieces 9b and 9C may be changed to either one, and depending on the case, the lower edge of the overhanging piece 9e may be changed. Since the upper and lower positioning pieces 9b and 9C can also be used as positioning parts for the flanges, these upper and lower positioning pieces 9b and 9C may be omitted.

In addition, in the case shown in the figure, there is no need to provide a distance shifted in the axial direction between the upper end of the coil and the upper end of the short ring due to the design, but of course, if necessary, the upper end may also be stretched. A projecting piece 9d may be provided, and a short ring may be positioned between these upper and lower projecting pieces.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the relationship between the bobbin, coil and sheath member of an embodiment of the present invention 1 to the lance, Fig. 2 is a plan view of an example of the sheet member, and Fig. 3 is a transformer of one embodiment. 4 is a front view, and FIG. 4 is a side view. In the figure, 1 is a coil bobbin, 3 and 4 are flanges, 8 is a coil, 9 is a sheet member, 9d is an overhanging piece thereof, 10 is a positioning edge facing in the axial direction, 11 is a core, 12 is a frame type bracket, 13 is a bottom plate, and 14 is a short ring.

Claims (1)

[Scope of utility model registration request] On at least one side of the coil wound on the coil bobbin,
An insulating sheet member provided on at least one end side in the axial direction is provided with an overhanging piece that overhangs beyond the side surface orthogonal to the side surface, and the inside of the overhanging piece in the axial direction is attached. A transformer characterized in that the short ring is wound such that the corresponding axial end edge of the short ring is aligned with the facing positioning edge.