JPH0334899Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a ballast having a bobbin externally fitted onto a laminated core.

<Prior art> As shown in FIGS. 11 and 12, ballasts for discharge lamps have conventionally used a coil of a T-shaped laminated core 2 that is assembled into a U-shaped laminated core 1 in a diagonal shape, for example. There is one in which a molded bobbin 7 having a body part 4 and collar parts 5 and 6 is fitted onto the winding part 3, and a terminal block 8 is integrally formed on the bobbin 7.

<Problems to be solved by the invention> However, in the past, the forming bobbin 7 was replaced with the laminated iron core 2.
Since the laminated core 2 has a structure in which the laminated core 2 is simply fitted into the stack, the laminated core 2 may expand and contract to some extent in the lamination direction, and the fit between the forming bobbin 7 and the laminated core 2 is particularly limited at the outer end in the axial direction. There is a risk that the parts 2 may loosen in the stacking direction, and this causes a problem in that the flanges 5, 6 and the terminal block 8 at the outer end in the axial direction of the forming bobbin 7 may warp or fall as shown by chain lines.

In view of the above problems, it is an object of the present invention to provide a stabilizer that can prevent the flange of a molded bobbin and the terminal block from warping or falling.

<Means for solving the problem> The technical means of the present invention for solving this technical problem includes a laminated core 11 formed by laminating a large number of steel plates,
The formed bobbin 19 fitted onto the coil winding portion 12 of the laminated core 11 and the coil winding portion 1 of the laminated core 11
The coil 1 is wound around the coil 2 through the forming bobbin 19.
8, the molded bobbin 19 has a coil winding part 1
2, and a pair of flanges 2 protruding from both axial ends of the body 22.
3 and 24, a cutout groove 32 is formed on the outer end surface of the laminated core 11 in the axial direction of the forming bobbin 19 over the entire length in the lamination direction of the laminated core 11.
A connecting portion 33 is provided integrally with the forming bobbin 19 to connect the opposing portions in the lamination direction at the outer end of the forming bobbin 19 in the axial direction. It is fitted into the notch groove 32 so as to close it.

<Function> The connecting portion 33 can reinforce the fitting of the axially outer end of the forming bobbin 19 so that it does not loosen in the stacking direction, and thereby the flanges 23 and 24 on the axially outer end side of the forming bobbin 19 can be reinforced. This can effectively prevent the terminal block 26 from warping or falling.

<Example> Hereinafter, the present invention will be explained according to the illustrated example. In FIGS. 1 to 6, 11 is a T-shaped laminated core, which has a coil winding part 12,
A yoke portion 13 is provided at one end side of the coil winding portion 12 . 14 is a U-shaped laminated core that is combined with the laminated core 11. Both iron cores 11 and 14 are made by laminating a predetermined number of silicon steel plates cut into a predetermined shape, and these are combined in a Japanese letter shape to form a gap 15 between them. The part 12 is the central magnetic path, and both legs 1 of the iron core 14
6 and 17 are external magnetic paths.

18 is a coil, and the coil winding part 12 of the iron core 11
It is wound around a forming bobbin 19. The molded bobbin 19 is insert-molded onto the iron core 11 from synthetic resin, and includes a body part 22 that tightly fits around the coil winding part 12, and a pair of flanges protruding from both ends of the body part 22 in the axial direction. 23 and 24 are integrated.

Reference numeral 26 denotes a terminal block, which is integrally provided on the bobbin 19 so as to protrude outward in the stacking direction of the yoke portion 13 of the laminated iron core 11. A plurality of terminal mounting holes 27 are provided in the terminal block 26, and terminals are detachably held in the mounting holes 27.

31 is a protruding wall formed integrally with the bobbin 19;
It is provided along the stacked end surface of the yoke portion 13 on the opposite side from the terminal block 26. Reference numeral 32 denotes a pair of notch grooves provided on the outer end surface of the yoke portion 13, which are formed over the entire length of the yoke portion 13 in the stacking direction. A pair of connecting parts 33 are integrally molded on the molded bobbin 19, and connect the protruding wall 31 and the terminal block 26, which are opposite portions in the stacking direction at the outer end of the molded bobbin 19 in the axial direction. This connecting portion 33 is connected to the laminated core 1
It is fitted into the notch groove 32 of No. 1 so as to close the notch groove 32. Therefore, the state in which the terminal block 26 and the protruding wall 31 are fitted onto the laminated core 11 can be reliably maintained by the connecting part 33, and the terminal block 26 and the protruding wall 31 can be prevented from warping from the yoke part 13. Tsutari,
It is possible to effectively prevent the flange from collapsing, and it is also possible to prevent the flange portion 24 from warping or collapsing.

7 and 8 show another embodiment, in which a pair of notched grooves 32 are provided on the outer end surface of the coil winding portion 12 over the entire length in the stacking direction, and a connecting portion 33 that closes the notched grooves 32 is provided. This connects opposing portions of the flange portion 23 that are opposed to each other in the stacking direction. In this case, the connection portion 33 holds the end portion of the molded bobbin 19 on the side of the flange portion 23 to the iron core 11 so as not to loosen, thereby effectively preventing the flange portion 23 from warping or falling.

FIG. 9 and FIG. 10 show still another embodiment, in which a mounting portion 37 having a screw hole 36 is provided integrally with the flanges 23 and 24, and the screw hole 37 of this mounting portion 37 is
It can be detachably fixed to a device 39 or the like using a screw 38 or the like that is screwed into the device. In addition,
In this case, although not shown in the drawings, the notch groove 32 is provided on the outer end surface of the yoke portion 13 or the outer end surface of the coil winding portion 12 over the entire length in the stacking direction, and the notch groove 32 Connecting part 3 so as to close the
3 is integrally provided on the molded bobbin 19.

In addition, in the above embodiment, the notch groove 32 and the connecting portion 3
3 is provided only on one side of the outer end surface of the coil winding portion 12 or the outer end surface of the yoke portion 13 of the iron core 11, but it may be provided on both sides instead. Further, the laminated core to which the present invention is applied is not limited to the T-shape, but may be E-shape, I-shape, or other shapes.

<Effects of the invention> According to the invention, the formed bobbin 1 of the laminated core 11
A notch groove 32 is provided on the outer end surface in the 9-axis direction over the entire length in the lamination direction of the laminated core 11, and a connecting portion 33 connecting the opposing portions in the lamination direction at the outer end of the molded bobbin 19 in the lamination direction is formed. The connecting portion 33 is provided integrally with the bobbin 19, and the connecting portion 33 is provided integrally with the bobbin 19.
Since it is fitted into the notch groove 32 so as to close the notch groove 32 of No. 1, the connecting portion 33 connects the laminated iron core 1
The fitting of the outer end of the molded bobbin 19 in the axial direction to the outer end of the molded bobbin 19 in the axial direction can be reinforced so that it does not loosen, and the flange parts 23 and 24 and the terminal block 26 on the outer end of the molded bobbin 19 in the axial direction can be reinforced to prevent warping or falling. can be effectively prevented. Moreover, by fitting the connecting portion 33 and the notch groove 32, it is possible to reliably prevent the forming bobbin 19 from shifting relative to the coil winding portion 12, and also to
The silicon steel plates of No. 1 can be fixed so that they do not shift relative to each other, and the practical effect is remarkable.

[Brief explanation of drawings]

Figure 1 is a front view showing one embodiment of the present invention;
3 is a side view, FIG. 4 is a bottom view, FIG. 5 is a rear view, and FIG. 6 is a sectional view. FIG. 7 is a rear view showing another embodiment, and FIG. 8 is a cross-sectional plan view thereof. FIG. 9 is a side view showing another embodiment, and FIG. 10 is a bottom view of the same. FIG. 11 is a plan sectional view showing a conventional example, and FIG. 12 is a perspective view thereof. 11... Laminated core, 19... Molded bobbin, 32
...Notch groove, 33...Connection part.

Claims (1)

[Scope of utility model registration request] A laminated core 11 formed by laminating a large number of steel plates, a formed bobbin 19 fitted onto the coil winding portion 12 of the laminated core 11, and a coil winding portion 12 of the laminated core 11.
A coil 18 is wound through a forming bobbin 19 to
The forming bobbin 19 includes a coil winding part 12.
A rectangular cylindrical body 22 that tightly fits and surrounds the body 22, a pair of flanges 23 protruding from both axial ends of the body 22,
24, a notch groove 32 is provided on the outer end surface of the laminated core 11 in the axial direction of the molded bobbin 19 over the entire length in the lamination direction of the laminated core 11, and the axial outer end of the molded bobbin 19 A connecting portion 33 that connects the opposing portions in the stacking direction.
is provided integrally with the molded bobbin 19, and the connecting portion 3
Reference numeral 3 denotes a stabilizer that is fitted into the notched groove 32 of the laminated core 11 so as to close the notched groove 32.