JPH0614421Y2 - Core insulation case - Google Patents

Description

[Detailed Description of Device] a. Purpose of the Invention [Industrial field of application] The present invention relates to a structure of a core insulating case that insulates a winding from each other and an annular core.

[Conventional technology]

As a noise prevention coil, there is a common choke coil in which an annular core has two or three windings.

A conventional two-winding (single-layer AC) coil covers the outer peripheral surface of an annular core by an insulating case body having a bottomed concentric double cylindrical body and an annular lid plate that fits into the opening of the insulating case body. , Core insulation of a structure in which the winding is divided by a partition plate provided inside the inner cylinder of the main body, and a wide partition provided on the bottom surface of the insulating case main body and the top surface of the lid plate in a form connected to the partition plate. It was made using a case. The partition plate of the lid plate slightly protrudes from the inner circumference or the outer circumference of the lid plate, and the protruding portion abuts the inner surface of the inner cylinder or the outer cylinder of the insulating case body to combine the insulating case body and the lid plate. This combination was held by the winding wound from above the core insulating case.

[Problems to be solved by the device]

The dimensional tolerance of the finish of the annular core, especially the sintered ferrite core, is the dimensional tolerance of the core insulation case (for example ± 0.
Since it is larger than (less than 15 mm) (for example, ± 0.3 mm), the annular core may move (also called play) in the core insulating case due to the setting and variations in the dimensions of both. When the play of the core is large, there is a problem that it is necessary to inject and fix a silicone resin having elasticity after solidification into the core insulating case in order to eliminate the play of the core that causes abnormal noise. This resin injection work is troublesome and time-consuming.

B. Configuration of the Invention [Means for Solving the Problems] The present invention is directed to a concentric inner cylinder, an outer cylinder, a double cylinder having a bottom plate between the cylinders, and an inner space of the inner cylinder parallel to the axial direction. A partition plate which is equally divided into a plurality of parts on both sides, and which projects from the upper and lower end surfaces of the inner cylinder by a required length and is adjacent to the end of the partition plate on the downward projecting portion, and is wide on the bottom plate to the outer peripheral edge of the outer cylinder. An insulating case body integrally formed with the bottom partition,
A lid plate having a wide upper partition integrally formed in the radial direction with a groove for fitting to an end of the partition plate on the upper protrusion side is formed on the upper surface of an annular insulating plate that closes the upper opening of the insulating case body. In the core insulating case, the core insulation is characterized in that a through vertical hole is formed in each of the upper partitions of the cover plate, and a push leaf spring is provided in the through vertical hole by projecting from the bottom surface of the cover plate as required. A case is a core insulating case which is provided so as to project from a bottom surface of a substrate, and a core housed in the core insulating case is pressure-bonded and fixed by the action of a pressing leaf spring.

[Action]

The push spring provided on the cover plate presses and fixes the annular core toward the bottom plate of the insulating case body. Thus, even if there is some play with the core due to the dimension setting, the core is pressed and fixed in the insulating case and does not move, so it is possible to provide a core insulating case that does not generate abnormal noise and can eliminate the conventional resin injection work. Becomes

〔Example〕

FIG. 1 shows an exploded perspective view of an embodiment of the present invention. FIG. 2 is a perspective view of a main part of the cover plate (A in FIG. 1).

The insulating case body 1 has a conventional structure, and forms an inner cylinder 11 and an outer cylinder 12 arranged concentrically, and a bottomed double cylinder having a bottom plate 13 therebetween. The inner cylinder 11 is integrally formed with a partition plate 14 that divides the inner space into two equal parts along a plane parallel to the axis and that projects from both upper and lower end surfaces of the inner cylinder 11 by a required amount. The bottom plate 13 of the insulating case body 1 is integrally formed with two wide bottom partitions 15 from both side ends of the downward projecting portion of the partition plate 14 to the outer peripheral portion of the outer cylinder 12.

As the insulating case body 1, as shown by the chain line in FIG. 1, a side partition 16 that extends over the bottom partition 15 and projects vertically on the outer surface of the outer cylinder 12 and has the same projecting height as the partition plate 14 is provided. It may be

The lid plate 2 is made of an insulative material with high burnability, and has an inner cylinder 11 and an outer cylinder.
It is an annular plate that fits into the upper opening of 12 and closes the double cylindrical space, and its upper surface has the same height as the protruding height of the partition plate 14 at the positions corresponding to both ends of the upper protruding portion of the partition plate 14. A width (bottom partition) that is sufficiently larger than the thickness of the partition plate 14.
Two upper partitions 3 up to the outer peripheral portion of the cover plate 2 having the same size as the width of 15) are integrally formed.

As shown in FIG. 2, the two upper partitions 3 are triangular prism-shaped protrusions that form vertical grooves on both side edges on both inner sides for fitting as side ends of the upper protrusions of the partition plate 14. The part 31 is integrally provided. Further, the upper partition 3 is provided with a rectangular vertical through hole 32 penetrating to the bottom surface of the cover plate 2, and on the inner wall of the through vertical hole 32, a push leaf spring 4 fixed at one end is provided with a protrusion 33 at its free end. The lid plate 2 is integrally provided by projecting a required length from the bottom surface of the lid plate 2.

FIG. 3 shows a combined state of the insulating case body 1 and the cover plate 2 in a vertical sectional view taken along the line I-I in FIG. The protrusion 33 at the free end of the pressing leaf spring 4 hangs in the upper space of the double cylinder of the insulating case body 1 and elastically contacts the upper surface of the annular core whose height does not reach the bottom surface of the lid plate 2, and the annular core is fixed by pressure contact. To do. In the case of an annular core having a height that almost reaches the bottom surface of the cover plate 2, the annular core is pressed and fixed by pressing the free end of the pressing leaf spring 4 into the through vertical hole 32. Moreover, since the lid plate 2 is tightly bound together with the main body 1 by the winding wire, the lid plate 2 does not float up and the mutual combination state can be maintained in a normal state.

C. As described above, according to the present invention, there is almost no need to change the outer shape and size of the conventional core insulating case body, and the simple structure provided in the upper partition of the lid plate allows the annular core inside the case to be The play is fixed under pressure, and abnormal noise can be prevented. Moreover, the work of injecting the silicone resin into the core insulating case can be omitted, and the core insulating case can be provided which can maintain good quality and reduce the working cost.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a core insulating case showing an embodiment of the present invention. FIG. 2 is an enlarged perspective view of a portion A in FIG. FIG. 3 is a vertical cross-sectional view taken along the line I-I of FIG. 1 showing a combined state of the core insulating case according to the embodiment of the present invention. 1 ... Insulating case body, 2 ... Lid plate, 3 ... Upper partition, 4 ... Push leaf spring, 11 ... Inner cylinder, 12 ... Outer cylinder, 13 ...
... bottom plate, 14 ... partition plate, 15 ... bottom partition, 16 ... side partition, 31 ... projection part, 32 ... through vertical hole, 33 ... projection.

Claims (1)

[Scope of utility model registration request] 1. A concentric inner cylinder, an outer cylinder, a double cylindrical body having a bottom plate between both cylinders, an inner space of the inner cylinder is equally divided into a plurality of parts on a plane parallel to the axial direction, and Insulation integrally formed with a partition plate protruding from the upper and lower end surfaces of the inner cylinder for a required length and a wide bottom partition adjacent to the end of the partition plate on the downward protruding portion and provided on the bottom plate to the outer peripheral end of the outer cylinder. On the upper surface of the case body and the annular insulating plate that closes the upper opening of the insulating case body, a wide upper partition having a fitting groove to the end of the partition plate on the upper protrusion side is integrally formed in the radial direction. In a core insulating case including a lid plate, through vertical holes are formed in the upper partition of the lid plate, and a pressing leaf spring is provided in the through vertical hole so as to project a required length from the bottom surface of the lid plate. Characteristic core insulation case.