JPS642432Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an electromagnetic device in which a coil is wound between closely spaced flanges on a coil bobbin, and the coil can be wound efficiently and with a high occupancy rate without worrying that the winding state will collapse. This is what I did to get it.

For example, in a discharge lamp ballast, as shown in FIG.
There are some in which a filament coil 2 for preheating the filament is wound between the flanges 1a and 1b (for example, Japanese Patent Application Laid-open No. 56-96821 and Japanese Utility Model Publication No. 56-589). However, in the past, the filament coil 2 was constructed by winding the coil conductor 3 around the coil bobbin 1 in the same way as the primary coil and the secondary coil as shown in the figure. In order to increase the efficiency, aligned winding is required, but winding in this way requires a feeding mechanism for the coil conductor 3, which increases the number of turns, which reduces manufacturing efficiency. If the width between 1a and 1b and the wire diameter of the coil conducting wire 3 do not match, there is a risk that the filament coil 2 will collapse, and there is also a problem that the occupancy rate will deteriorate and it will not be possible to wind it within the space.

The present invention has solved the above problem, and its feature is that in an electromagnetic device in which a coil is wound between closely spaced flanges on a coil bobbin, the coil has a width slightly smaller than the width between the flanges. A conductor formed in the form of a film is wound on a coil bobbin, and a lead-out part drawn out along one of the flanges is formed on the winding start end side of the coil, and the wound part of the coil, the lead-out part, and A gap is formed between each flange and the other flange, and interlayer insulating paper is interposed between each layer of the winding portion of the coil, and both widthwise ends of this interlayer insulating paper are connected to the drawer part and the other flange. It is located at a point that projects outwardly from the winding portion of the coil so as to make contact with it.

Hereinafter, the present invention will be explained according to the illustrated embodiment. FIG. 2 shows a circuit diagram of a discharge lamp lighting device, in which 5 is an AC power supply, 6 is a discharge lamp, and 7 is a ballast for the discharge lamp. So, the primary coil 8, the secondary coil 9,
Filament coils 10 and 11 for preheating the filament of the discharge lamp 6 are provided. 12 is a discharge resistance, 13
is a phase advance capacitor.

The discharge lamp ballast 7 is constructed as shown in FIGS. 3 and 4. That is, the ballast 7 includes a pair of E-type iron cores 1 in addition to the coils 8, 9, 10, and 11.
4, 15 and an I-type iron core 16 in a diagonal shape, and a pair of coil bobbins 18, 19 fitted in the central magnetic path of the laminated iron core 17. And one coil bobbin 18 has a collar 18a,
18b, 18c with wide spacing between the collars 18a, 1
A primary coil 8 is wound between the flanges 18b and 18c, and a filament coil 10 is wound between the flanges 18b and 18c, which are narrowly spaced.
is wrapped. The other coil bobbin 19 has flanges 19a, 19b, 19c, and 19d, and the secondary coil 9 is wound between the flanges 19a and 19b which are wide apart, and the leaky core 20 is fitted between the flanges 19b and 19c. A filament coil 11 is wound between the narrowly spaced flanges 19c and 19d. The primary coil 8 and the secondary coil 9 are formed by winding coil conductors on bobbins 18 and 19. filament coil 1
0 and 11 are formed by winding a conductor 21 formed in a film shape with a width slightly smaller than the width between the flanges 18b, 18c and the flanges 19c, 19d on the bobbins 18, 19, as shown in FIG. A pull-out portion 21a is formed on the winding start end side of the roll 11 along the flanges 18b and 19d. Gaps are formed between the wound portions of the coils 10 and 11, the collars 18c and 19c, and the pull-out portion 21a, and the filament coil 1
An interlayer insulating paper 22 is interposed between each layer of the 0 and 11 winding portions, and both ends of the interlayer insulating paper 22 in the width direction are exposed from the coils 10 and 11 so as to contact the flanges 18c and 19c and the pull-out portion 21a. It stands out.

According to the configuration of the above embodiment, when winding the filament coils 10, 11 around the bobbins 18, 19, there is no need to turn the conductor 21, and the winding can be performed very efficiently.
1 is not likely to collapse, and the occupancy rate of the coils 10 and 11 is also greatly improved. Further, the widthwise end of the interlayer insulating paper 22 is used to connect the pull-out portion 21a and the coil 1.
It is possible to efficiently insulate the coils 0 and 11, and when filling the compound with the coils 10 and 11.
11 winding part, collars 18c, 19c and drawer part 2
Since there is a gap between the coils 1a and 1a, the compound can penetrate deep into the coils 10 and 11, and the insulation performance is also improved.

In the above embodiment, a pair of coil bobbins 18, 19 are fitted to the central magnetic path of the iron core 17.
As shown in FIG. 6, one coil bobbin 23 may be fitted to the central magnetic path of the iron core 17, and flanges 23a, 23b, 23c, and 23d may be provided in the center of the bobbin 23, and the filament coils 10 and 11 may be wound between the closely spaced flanges 23a, 23b and the flanges 23b, 23c. Alternatively, as shown in FIG. 7, a coil bobbin 24 for winding the primary coil, a coil bobbin 25 for winding the secondary coil, and a coil bobbin 26 for the filament coil may be separately constructed, and the coil bobbin 24 may be wound around the filament coil.
6 narrowly spaced flanges 26a, 26b and flange 26b,
The filament coils 10 and 11 may be wound between the film-shaped conductor 26c.
1 comprises filament coils 9, 1
0, for example, as shown in FIG. 8, the coil bobbins 24 and 25 for the primary and secondary coils are
A number of flanges 24a, 25a are provided at narrow intervals on the inner surface of the casing 24. The flanges 24a, 24a and 25b,
The primary coil 8 and the secondary coil 9 may be constructed by winding a film-shaped conductor 21 between the coils 25b and connecting the conductors 21 in series. The present invention is not limited to ballasts, and may also be applied to transformers and other electromagnetic devices.

According to the present invention, the coil is wound between the narrow flanges of the coil bobbin, and the conductor formed in the form of a film with a width corresponding to the width between the flanges is wound between the flanges. There is no need to turn the conductor when winding, making winding very efficient.
Further, after winding, there is no risk that the winding state will collapse, and winding can be carried out with a high occupation rate. Moreover, a gap is formed between the winding part of the coil and the other collar and pull-out part, and interlayer insulating paper is interposed between each layer of the winding part of the coil, and both widthwise ends of this interlayer insulating paper are interposed between each layer of the winding part of the coil. The part protrudes outward from the wound part of the coil so as to contact the collar and the pull-out part, so the end of the interlayer insulation paper in the width direction can be used to connect the draw-out part and the collar side to the wound part of the coil. In addition, when filling with compound, there is a gap between the winding part of the coil and the flange and pull-out part, so the compound can penetrate deep into the coil, and the insulation Performance will also be higher.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing a conventional example, FIG. 2 is a circuit diagram showing an embodiment of the present invention, FIG. 3 is a plan view of the ballast, and FIG. 4 is a side sectional view of the ballast. FIG. 5 is a side sectional view of the same essential parts, and FIGS. 6 to 8 are side sectional views showing other embodiments. 8...Primary coil, 9...Secondary coil, 10,
11... Filament coil, 18, 19... Coil bobbin, 21... Conductor, 23... Coil bobbin, 23a, 23b, 23c... Tsuba, 24, 2
5, 26...Coil bobbin, 26a, 26b, 2
6c...Tsuba, 24a, 25a...Tsuba.

Claims (1)

[Claims for Utility Model Registration] In an electromagnetic device in which a coil is wound between closely spaced flanges on a coil bobbin, the coil is formed by winding a conductor formed in a film shape with a width slightly smaller than the width between the flanges on the coil bobbin. A lead-out part drawn out along one collar is formed on the winding start end side of the coil, and gaps are formed between the wound part of the coil, the lead-out part, and the other collar, respectively. An interlayer insulating paper is interposed between each layer of the wound portion of the coil, and both ends of the interlayer insulating paper in the width direction extend outward from the wound portion of the coil so as to contact the lead-out portion and the other collar. An electromagnetic device characterized by being protruded.