JPS645860Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an inductance element in which a toroidal core is covered with a ring-shaped insulating case having a through hole divided into two by an insulating partition plate in the center, and a wire is wound thereon. The present invention relates to an inductance element in which a separately formed engagement portion with a partition plate does not protrude into a through hole.

Conventionally, inductance elements used in noise filters, etc., have been made by dividing and winding a winding around a toroidal core, but since the insulation resistance of the toroidal core is low, it is not possible to wind the winding directly. If this was not possible, the toroidal core was wrapped with insulating tape or the toroidal core was housed in an insulating case, and the winding wire was divided and wound on top of the toroidal core.

However, in the case of an inductance element having the above-mentioned configuration, skill is required to wrap the insulating tape and wire winding work, and the toroidal core may be small, the winding wire diameter may be large, or the winding wires may be overlapped. In the case of winding, etc., there is a drawback that the insulation interval between the divided and wound windings becomes small, and the withstand voltage of the inductance element decreases.

As a countermeasure for this, as shown in Fig. 1, a toroidal core (not shown) is covered from both upper and lower sides with an annular insulating case 2 divided into upper and lower parts, and a protrusion 7 is provided on the circumferential surface of the through hole 6 of the insulating case. , a vertical groove 8 is formed in this protrusion 7, and an insulating partition plate 5 is inserted and fixed therein;
An inductance element 1 has been proposed in which an insulating interval is maintained between windings 4 separately wound on an insulating case 2. However, in the case of the inductance element configured as described above, although sufficient insulation spacing between the windings can be maintained, a protrusion is formed in the through hole of the insulating case to fix the insulating partition plate. There is a problem in that the space available for winding the wire becomes narrower and the winding operation requires more man-hours.

This invention was devised to solve the above problems, and is an inductance element that can maintain a sufficient insulation gap between the divided windings, is highly reliable, and is easy to wind. The purpose is to provide the following.

In order to achieve the above-mentioned object, the inductance element of the present invention has a winding wire divided and wound on an annular insulating case having a built-in toroidal core and a through hole in the center, and the above-mentioned through hole is formed between the divided windings. In an inductance element in which an insulating partition plate is arranged so as to divide a hole into two, inner walls are placed on the upper and lower surfaces of the insulating case at opposite positions that divide the through hole into two, on an extension surface of the circumferential surface of the through hole. Provided with a protrusion formed with a
A continuous groove is formed on the inner wall of the protrusion and the circumferential surface of the through hole between the protrusions, and an insulating partition plate is engaged with the groove.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 2 is a perspective view showing an inductance element according to an embodiment of the present invention, and FIG. 3 is an exploded perspective view of the inductance element according to an embodiment of the present invention, with the windings omitted. In the figure, 1 is an inductance element, 2 is an insulating case, 3 is a toroidal core,
4 indicates a winding, and 5 indicates an insulating partition plate. The inductance element 1 is constructed by covering a toroidal core 3 from both upper and lower sides with an annular insulating case 2 divided into two halves, and winding a winding 4 by dividing it into two. Through hole 6 in the center of case 2
An insulating partition plate 5 is arranged so as to divide it into two parts. Projections 7 are provided on the upper and lower surfaces of the insulating case 2 at opposing positions dividing the through hole 6 into two in a radial direction of the insulating case 2 . The inner wall of the protrusion 7, that is, the side wall on the side of the through hole 6, is formed on an extended surface of the peripheral surface of the through hole 6, and the inner wall of the protrusion 7 and the through hole between the upper and lower protrusions 7 A vertical groove 8 that continues in the axial direction of the insulating case 2 is formed on the circumferential surface of the hole 6 . The vertical groove 8 constitutes an engaging portion with the insulating partition plate 5, and no protrusion is formed in the through hole 6 by the engaging portion. Furthermore, a horizontal groove 9 is formed on the upper surface of the protrusion 7 on the upper surface of the insulating case, and a lateral groove 9 that is connected to the longitudinal groove 8 on the inner wall is formed on the outer peripheral surface of the insulating case between the upper and lower protrusions 7.
A protrusion 10 that is connected to the insulating case 2 is formed in the axial direction of the insulating case 2 .

The insulating case 2 has an upper part 2a and a lower part 2b.
The upper part 2a and the lower part 2b both have a substantially U-shaped cross section, and a space 11 in which the toroidal core 3 is housed is formed. In addition, fitting steps 12 and 13 are formed on the outer circumferential surface of the outer wall end and the inner circumferential surface of the inner wall end of the case upper part 2a, while the toroidal core storage space 11 side of the outer wall and inner wall of the case lower part 2b is formed. Similar fitting step portions 14 and 15 are formed on the circumferential surface of the end portion of the case, so that when the case upper side portion 2a and the lower side portion 2b cover the toroidal core 3 from above and below, they fit into each other. ing. Furthermore, a protrusion 16 and a recess 17 for positioning during fitting are formed on the joint surfaces of the protrusion 10 provided on the outer peripheral surface of the outer wall of the insulating case 2 on the case upper side part 2a side and the case lower side part 2b side, respectively. ing.

On the other hand, in the insulating partition plate 5, protrusions 18 are formed on both ends thereof to fit into vertical grooves 8 formed on the circumferential surface of the through hole 6 of the insulating case 2, and furthermore, on both sides of the upper end, A protrusion 19 is provided to protrude and engage with a horizontal groove 9 formed on the upper surface of the protrusion 7 on the upper surface of the insulating case.

The insulating case 2 and the insulating partition plate 5 are made by molding synthetic resin such as nylon, polycarbonate, polypropylene, polystyrene, or the like.

However, insulating case 2, toroidal core 3,
To assemble the winding 4 and the insulating partition plate 5 to obtain the inductance element 1, the toroidal core 3 is first inserted into the core storage space 11 of the lower part 2b of the insulating case 2, and the toroidal core 3 is formed on the outer peripheral surface of the insulating case 2. The toroidal core 3 is covered with the upper part 2a of the insulating case, and the fitting steps 12 and 13 and the fitting steps 14 and 15 are aligned by the protrusion 16 and the recess 17 of the protrusion 10, respectively. After fitting, the toroidal core 3 is housed in the insulating case 2. next,
After passing through the through hole 6 of the insulating case 2 and dividing and winding the two windings 4 on the insulating case 2, the protrusions 18 on both ends of the insulating partition plate 5 are inserted into the through hole 6 of the insulating case 2. It is inserted into the vertical groove 8 on the circumferential surface, and the protrusion 19 at the upper end of the insulating partition plate 5 is engaged with the lateral groove 9 of the protrusion 7 on the upper surface of the insulating case 2 to be fixed. In this state, the insulating partition plate 5 is arranged between the two windings 4 so as to divide the through hole 6 of the insulating case 2 into two, and its upper and lower end surfaces are the upper and lower surfaces of the protrusion 7 of the insulating case 2. It is located approximately on the same plane as the

The thickness of the insulating partition plate 5, the thickness of the protrusion 7 on the upper and lower surfaces of the insulating case 2, and the thickness of the protruding part 10 on the outer peripheral surface of the insulating case are such that the required insulation interval can be maintained between the two windings 4. Insulating partition plate 5
The height of the protrusion 7 on the upper and lower surfaces of the insulating case 2 from the upper and lower surfaces of the insulating case 2 is the same as that of both windings 4.
The dimensions are such that the required insulation creepage distance can be obtained between the two.

As explained above, in the inductance element of the present invention, protrusions are provided on the upper and lower surfaces of the insulating case at opposing positions that divide the through hole into two, and these protrusions are used for the winding that is divided and wound on the insulating case. Since the wire is positioned, even an unskilled worker can wind the wire easily and reliably. Also,
Since there are no protruding parts in the through-hole of the insulating case, a large space is available for the winding operation, making the operation easier and reducing the working time, which in turn improves production efficiency. Furthermore, the protrusion of the insulating case and the insulating partition plate maintain a sufficient insulating creepage distance and insulating interval between the windings, resulting in various effects such as improved reliability.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional inductance element, Fig. 2 is a perspective view showing an inductance element according to an embodiment of the present invention, and Fig. 3 is a perspective view showing a winding of an inductance element according to an embodiment of the present invention. It is an abbreviated exploded perspective view. 1... Inductance element, 2... Insulating case, 3... Toroidal core, 4... Winding wire, 5...
Insulating partition plate, 6... through hole, 7... protrusion, 8...
...Mizobe.

Claims (1)

[Scope of utility model registration request] An inductance in which a winding is divided and wound around an annular insulating case having a built-in toroidal core and a through hole in the center, and an insulating partition plate is arranged between the divided windings so as to divide the through hole into two. In the element, a protrusion having an inner wall formed on an extended surface of the circumferential surface of the through hole is provided on the upper and lower surfaces of the insulating case at opposing positions that divide the through hole into two, and the inner wall and the inner wall of the protrusion are provided. An inductance element characterized in that a continuous groove is formed on the circumferential surface of a through hole between the protrusions, and an insulating partition plate is engaged with the groove.