JPS606532B2 - electromagnetic device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnetic device, and an object thereof is to provide an electromagnetic device with a high degree of safety.

Figure 1 shows an electromagnetic device such as a general discharge lamp ballast.
This electromagnetic device has a structure in which the laminated iron core 1 is shaped such that the plane is located in the cross section of the ballast, and the laminated surface is located in the longitudinal section, and the winding 2 is wound along the horizontal plane.

By the way, in such an electromagnetic device, if the insulation of the winding 2 deteriorates, the winding 2 will short-circuit and heat up, leading to smoke and fire, so the winding part must be completely covered with a metal plate. No. Note that 3 in the figure is a case. The present invention has been provided in view of this point, and will be explained below with reference to Examples.

FIG. 2 shows an assembled perspective view of the first embodiment. The laminated iron core 1 is fixed to the center of the upper surface of the case 3, and both ends of the iron core villages la on both left and right ends of the laminated iron core 1 are bent outward, and the bent pieces and the laminated iron core 1 are bent outward. Laminated iron core 1 between iron core 2
A gap 4 for attaching the coil cover is formed before and after both ends of the coil cover. The metal coil cover 5 is formed from a bent metal plate having a C-shaped cross section, and the bent pieces 5a at both ends have spring elasticity. In order to fix the coil cover 5, the curved piece 5a of the coil cover 5 is press-fitted into the gap 4 from above downward.
The coil cover 5 is fixed to the laminated iron core 1 by making the ends of the curved pieces 5a elastic on the surface of the laminated iron core 1 within the gap 4 by the spring elasticity resulting from the restoration due to the deformation.

At this time, the end portion 2a of the winding 2 is housed and covered between the side surface of the laminated iron core 1 and the leg portion of the coil cover 5. As shown in FIG. 3, a horizontal piece 5b may be provided extending inward from the upper end of the coil cover 5, and the upper end 2a of the winding 2 may be covered with this horizontal piece 5b. Of course it's good. Figure 4a
, b, and c respectively show a perspective view, a vertical cross-sectional view, and a cross-sectional view of a second embodiment of the present invention. In this embodiment, as shown in FIG. A window 6 is formed to allow the terminal portion 2b to protrude to the outside, and the case 3 is tightened and fixed by engaging the protrusions 7 at both ends of the case 3 with grooves 8 provided at both lower ends of the laminated iron core 1. are doing.

Note that 9 is a coil frame. FIG. 5 shows a third embodiment of a different type from the embodiment of FIG. 1, in which a curved piece 5a of the coil cover 5
The rock part is formed into a sharp knife edge 5c, and this knife edge 5c is inserted between the layers of the laminated iron core 1 and fixed by friction.

6 shows the end portion 2a of the winding 2 of the embodiment shown in FIG. 4 of the present invention.
A fourth embodiment is shown in which the structure is different. The present invention has a laminated iron core that is laminated in the lateral direction, and a winding that is wound around the laminated iron core along a horizontal plane, and both ends of the winding exposed on both sides of the laminated iron core are connected to the iron core. Because the wire is covered with a metal coil cover fixed by a wire, a part of the winding may cause a rare short circuit, and the surrounding insulation will heat, melt, and decompose, producing flammable decomposition products. ``Even if smoke and ignition occur, the metal coil cover has the effect of preventing the fire from spreading.

[Brief explanation of the drawing]

FIG. 1 is a diagram of a conventional example, FIG. 2 is a perspective view for explaining the assembly of the first embodiment of the present invention, FIG. Embodiment 2 is a perspective view, FIG. 4b is a vertical cross-sectional view of the same as above, FIG.
The figure is a perspective view of the third embodiment of the present invention, and FIG. 6 is a perspective view of the fourth embodiment of the same.
It is a perspective view of an example. 1 is a laminated iron core, 2 is a winding, 2a is an end, 3 is a case, 5
is the coil cover. Figure 2 Figure 1 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1 It has a laminated iron core that is laminated laterally and a winding that is wound around the laminated iron core along the horizontal plane, and both ends of the winding that are exposed on both sides of the laminated iron core are covered with metal coil covers. In an electromagnetic device coated with a laminated iron core, one or several pieces of iron core material at both ends of the laminated iron core are bent outward, and both ends of the coil cover are press-fitted and fixed into the gap between the bent pieces and the laminated iron core. An electromagnetic device characterized by: