JPH0227550Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] The invention consists of a core body that is a combination of an E-type laminated core and an I-type laminated core, and a rectangular annular coil body inserted through a sheet of insulating paper. This invention relates to an improvement in a ballast for a discharge lamp equipped with an electromagnetic coil.

[Prior art and its problems]

Figures 1 and 2 show conventional examples of electromagnetic coils in which a rectangular annular coil body is fitted through a sheet of insulating paper to a core body that is a combination of an E-type laminated core and an I-type laminated core. . This is made by attaching a piece of insulating paper 2 to an E-shaped laminated core 1 in advance, fitting a rectangular annular coil body 3 onto the insulating paper 2, and then combining it with an I-shaped laminated core 4. It is.

The insulating paper 2 includes a pair of U-shaped portions 2a, 2b that wrap around the E-shaped laminated core corresponding portions of the coil body 3, and a connecting portion 2c that connects the inner edges of the U-shaped portions 2a, 2b.
and presser portions 2d and 2e bendably provided on the outer edges of the U-shaped portions 2a and 2b. Then, the coil body 3 is fitted into the U-shaped portions 2a and 2b, and the presser portions 2d and 2e are
From the side of the laminated core 4, it is bent inward to cover the coil body 3 and overlapped with the connecting portion 2c, so that this portion is sandwiched between the E-type laminated core 1 and the I-type laminated core 4. be. Further, in order to insulate the lead wire 5 of the coil body 3 from the coil body 3, a part of the lead wire 5 is covered with an insulating tube 6.

However, the electromagnetic coil having the above structure has the following drawbacks.

First, during assembly, the coil body 3 is fitted onto the insulating paper 2 attached to the E-type laminated core 1, and the holding portions 2d and 2e of the insulating paper 2 cover the coil body 3 from the I-type laminated core 4 side. Fold the connecting part 2c inward as shown.
When trying to polymerize and sandwich between the E-type laminated core 1 and the I-type laminated core 4, the holding part 2d,
In order to prevent 2e from opening, it is necessary to press both together with adhesive tape or the like, which requires time and effort to assemble. This drawback is particularly disadvantageous when attempting to automate or mechanize assembly.

Second, since the insulating tube 6 is placed over a part of the lead wire 5 of the coil body 3, not only the number of parts increases and costs increase, but also a process for installing the insulating tube is required, which also requires automated assembly and This was disadvantageous when mechanizing the process.

[Purpose of invention]

This invention was developed in consideration of the above points, and does not require adhesive tape to hold down a part of the insulating paper during assembly, is suitable for automation and mechanization of assembly, and has a small number of parts. It is an object of the present invention to provide a ballast for a discharge lamp equipped with an electromagnetic coil that has advantages such as being economical and easy to use.

[Structure of the idea]

FIGS. 3 and 4 show perspective views before and after assembly of the electromagnetic coil used in the ballast for a discharge lamp according to the present invention. In the figure, reference numeral 11 denotes a coil body formed by winding an electric wire in a rectangular ring shape, the surface of which is coated with a suitable insulating material. Reference numeral 12 denotes an insulating paper that wraps the coil body 11, and the insulating paper 12 includes a pair of U-shaped portions 12a and 12b surrounding one opposing side of the coil body 11, and a pair of U-shaped portions 12a and 12b. 1
a connecting portion 12c that connects the outer edges of 2b;
The bending portions 12d and 12e are formed on at least one of the inner edges of the U-shaped portions 12a and 12b and overlap the connecting portion 12c. 12f
connects the lead wire 13 of the coil body 11 to the coil body 11
Connecting portion 12 of the insulating paper 12 to insulate from
It is a tongue piece made by cutting out a part of C and bending it outward. 14 is an E-type laminated core, and the central leg 1
4a and both side legs 14b, 14c, and the coil body 11 is fitted into the grooves 15a, 15b formed between these legs via the U-shaped parts 12a, 12b of the insulating paper 12. be. 6 is the insulating paper 12
This is an I-shaped laminated core that is combined with the tip of the leg of the E-shaped laminated core 14 via a connecting portion 12c and bent portions 12d and 12e.

When assembling such an electromagnetic coil, as shown in FIG. The body 11 is inserted into the hollow part of the coil body 11 from the lower surface thereof, and the opposite sides of the coil body 11 are connected to the U-shaped parts 12a, 1.
Wrap it in 2b. This work is performed by turning the insulating paper 12 and coil body 11 upside down, and
After wrapping the coil body 11 with
Of course, you can return the bottom to its original position. next,
The U-shaped parts 12a and 12b of the insulating paper 12 surrounding the coil body 11 are attached to the center leg 1 of the E-shaped laminated core 14.
The coil body 11 is fitted into the center leg 14a by inserting it into the grooves 15a, 15b formed between the coil body 4a and the legs 14b, 14c on both sides. In this case, the insulating paper 12 inserted into the hollow part of the coil body 11
Even if the inner edges of the U-shaped parts 12a and 12b are slightly opened towards the center of the hollow part, they can be returned to their normal positions by inserting the central leg 14a of the E-shaped laminated core 14, which facilitates automation and mechanization of assembly. will not cause any trouble.

Finally, the tongue piece 12f formed on the connecting part 12c of the insulating paper 12 is bent outward to be interposed between the lead wire 13 and the coil body 11, and the insulating paper 12 is attached to the tip of the leg of the E-type laminated core 14. The I-shaped laminated core 16 is assembled via the connecting portion 12c and the bent portions 12d and 12e of the paper 12 to complete the assembly of the electromagnetic coil.

[Effect of idea]

As is clear from the above description, in the present invention, the bent part (pressing part) formed on the outer edge of the U-shaped part of the insulating paper is bent inward from the side of the I-shaped laminated core, as in the conventional method. Instead of using a structure that wraps around the coil body, we formed a bent part on the inner edge of the U-shaped part of the insulating paper, and pressed this with the tip of the center leg of the E-shaped laminated core, so during assembly, There is no need to temporarily fasten the folded portion with adhesive tape, etc., and assembly is easy, making it suitable for automation and mechanization.

Further, since a part of the insulating paper covering the coil body is cut and raised to insulate the coil body and its lead wire, an insulating tube unlike the conventional one is not required. Therefore, there are advantages in that the number of parts is small, which is not only economical, but also easy to assemble.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the electromagnetic coil of a conventional discharge lamp ballast before assembly, Fig. 2 is a perspective view of the electromagnetic coil after assembly, and Fig. 3 is an assembly of the electromagnetic coil of the discharge lamp ballast according to the present invention. The previous perspective view, FIG. 4 is a perspective view after assembly, and FIG. 5 is a perspective view of insulating paper used in the electromagnetic coil of the discharge lamp ballast according to the present invention. 3 to 5, 11... coil body, 12... insulating paper, 12a, 12b... U-shaped part, 12c... connecting part, 12d, 12e... bending part, 12f... tongue Piece, 13...Lead wire, 14...
...E-type laminated core, 14a...Central leg, 15a, 1
5b...Groove portion, 16...I-type laminated core.

Claims (1)

[Scope of utility model registration request] A rectangular annular coil body 11 and a pair of U-shaped portions 12 surrounding opposite sides of the coil body 11
a, 12b and a connecting portion 12c that connects the outer edges of the U-shaped portions 12a, 12b, and the U-shaped portion 1.
A bent portion 12d, 1 formed on at least one of the inner edges of 2a, 12b and overlapping with the connecting portion 12c.
2e and a part of the lead wire 13 of the coil body 11 is insulated from the connecting portion 1.
The insulating paper 12 has a tongue piece 12f formed by cutting and raising a part of the insulating paper 2c and bending it outward. An E-shaped laminated core 14 in which a coil body 11 is fitted through 12 U-shaped parts 12a and 12b, and a connecting part 12c and a bent part 12d of the insulating paper 12 are attached to the tip of the leg of the E-shaped laminated core 14. , 12e, and an I-shaped laminated iron core 16.