JPH019135Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in an insulating case that insulates the toroidal core from the windings and insulates the windings from each other when a plurality of windings are applied to the toroidal core.

FIG. 1 shows a conventional example of an insulating case.

This insulating case is made of polypropylene, for example, and includes a case body 1 having a bottomed annular space capable of accommodating a toroidal core, and a lid member 2 capable of closing this space.

The case body 1 has a bottomed annular space with a depth corresponding to the thickness of the toroidal core and the lid member 2, formed by an outer cylinder 11 and an inner cylinder 12 that are located concentrically, and a double cylinder body with a bottom between them. ing. A partition plate 13 is integrally formed within the inner cylinder 12 so as to divide the space into two equal parts parallel to the axial direction. Partition plate 13
A bottom partition 14 is configured to protrude a required length from the end face of the inner cylinder 12, and at the bottom, extends in a fan shape from the inner cylinder 12 part to the outer peripheral part of the outer cylinder 11.
is formed.

The lid member 2 is a ring-shaped plate member that can close the annular space of the case body 1. On the upper surface thereof, an upper partition 21 extends in the radial direction by convex portions having the same height and a predetermined width as the protruding height of the partition plate 13 at two locations facing each other, and has a slightly triangular cross section from the inner diameter portion. It is integrally formed so as to protrude. A vertical groove 23 is formed in the protrusion 22 so as to fit into the side end of the protrusion of the partition plate 13.

After storing the toroidal core in case body 1,
When the lid member 2 is fitted so that the vertical grooves 23 are fitted to the side ends of the partition plate 13, the protrusion 22 of the upper partition 21 is locked with the upper end surface of the inner cylinder 12, so that the outer cylinder 11 and the upper end surface of the inner cylinder 12 and the lid member 2
can be aligned on the same plane as the top surface of

FIG. 2a is a partial sectional view taken along line A--A in FIG. 1 and shows this state.

In the above-mentioned insulating case, if there is a gap between the inner circumferential surface of the stored toroidal coil and the outer circumferential surface of the inner tube 12, the air can be removed from above the case body 1 and the lid member 2 through the space between the inner tube 12 and the partition plate 13. When winding is applied to both sides, the upper end wall of the inner cylinder 12 is pulled toward the outer cylinder 11, and the partition plate 13 is slightly curved in the diametrical direction in the portion of the partition plate 13 where the winding is not applied. As a result, a gap _g1 is created between the bottom of the vertical groove 23 and the side end surface of the partition plate 13 as shown in FIG. Then, the protrusion 22 of the upper partition 21 rises from the upper end surface of the inner cylinder 12 as shown by g ₂ in FIG. Board 1
A direct space g as shown in black in FIG.
(In the figure, the direction perpendicular to the paper surface) occurs.

In the present invention, the partition plate 1 of the inner cylinder 12 when winding is applied.
It is an object of the present invention to provide an insulating case having a structure that can prevent such a direct gap caused by the curvature of the cover member 3 and the floating of the lid member 2.

An embodiment of the present invention will be described below.

FIG. 3 is a perspective view showing an embodiment of the present invention, and the same parts as in FIG. 1 are given the same numbers.

The improvements to the case body 1 include the partition plate 1.
As shown in the exploded perspective view of FIG.
5 is provided.

The improvements to the lid member 2 include the upper partition 2.
It is 1. As shown in the exploded perspective view in FIG. 4 and the perspective view in which only the lid member 2 is turned upside down in FIG. A protruding portion 22 from the inside extends to the lower surface of the lid member 2 along the inner circumferential surface. A fitting (horizontal) groove 26 to the upper end wall of the inner cylinder 12 is provided in the extending portion 25, and the lid member 2
A triangular prism-shaped protrusion 27 that engages with the fitting recess 15 of the case body 1 is formed at the bottom of the vertical groove 23 that extends to the lower surface of the case body 1 .

After the toroidal coil is housed in the case body 1, the case body 1 and the lid member 2 are combined so that the vertical groove 23 and the protrusion 27 fit into the side end of the partition plate 13 and the fitting recess 15, respectively. . When the fitting (horizontal) groove 26 is fitted to the upper end wall of the inner cylinder 12, the (inner) protrusion 22 and the outer protrusion 24 of the upper partition 21 are connected to the inner cylinder 12 and the outer cylinder 11, respectively. It is locked at the upper end surface of. Thereby, the upper end surfaces of the outer tube 11 and the inner tube 12 and the upper surface of the lid member 2 can be aligned on the same plane. Furthermore, by locking the inner peripheral surface of the inner cylinder 12 with the extension part 25 of the protrusion part 22, the upper partition 21 and the partition plate 13
separation can be prevented. Further, even if the lid member 2 floats up, the engagement between the fitting recess 15 and the protrusion 27 can prevent the creation of a space that directly communicates between both sides of the upper partition 21.

As is clear from the above description, according to the present invention, even when the toroidal core is loosely fitted in the insulating case, deformation of the windings near the upper partition can be prevented, and the windings can An insulating case that can maintain sufficient insulation is obtained.
Furthermore, more types of toroidal cores can be applied to one type of insulating case than before, and the economic effect of reducing the number of types of insulating cases is significant.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing an example of a conventional insulating case, and Figure 2 is a sectional view of the main part taken along the line A-A in Figure 1, with Figure 2a being in a normal state and Figure 2b being a partition plate. shows the curvature of and the floating state of the lid member,
FIG. 3 is a perspective view of an embodiment of the present invention, FIG. 4 is an exploded perspective view, and FIG. 5 is a perspective view showing the lid member upside down. In the figure, 1: case body, 2: lid member, 1
1: Outer cylinder, 12: Inner cylinder, 13: Partition plate, 14: Bottom partition, 21: Upper partition, 22: (Inner) protrusion, 24: Outer protrusion, 25: Extension part, 27:
Protrusion.

Claims (1)

[Scope of utility model registration request] An inner cylinder forming a storage space for the cylindrical core, an outer cylinder having a bottom between the inner cylinder and the inner cylinder, and an inner space of the inner cylinder being equally divided into a plurality of parts parallel to the axial direction, an insulating case body integrally formed with a partition portion that protrudes a predetermined length from the end face of the inner cylinder and extends to the outer circumference of the outer cylinder at the bottom; and a ring-shaped case body that can close off the core storage space. an insulating plate member, and a lid member having a convex portion formed in the radial direction on an upper surface thereof having a fitting groove for a side end of the protruding portion of the partition portion; In the core insulating case, in which the wire is wound through the inner cylinder space divided by the partition after being housed and closed with a lid member, the side end of the protruding part of the partition of the case body and the outer periphery of the inner cylinder A fitting recess is provided in communication with the end portion, and the convex portion of the lid member extends along the inner circumferential surface to the lower surface and engages with the fitting groove on the wall end of the inner cylinder and the recess. A core insulating case characterized by having a protrusion formed therein.