JPH051058Y2 - - Google Patents

Description

[Detailed description of the invention] [Summary] Regarding a coil support device mounted on a printed circuit board, the present invention is designed to stably and reliably secure the insulation gap between the coil and other parts facing it, and to cool the coil and its mounting parts. In order to ensure that, the wire spacer between the windings that is fitted into the center hole of the toroidal core constituting the coil containing a magnetic core and wound around the toroidal core, and the wire spacer that is located at one end of the wire spacer and that is fitted into the center hole of the toroidal core that constitutes the coil containing the magnetic core. An insulating wall for isolating the coil from other parts facing the coil, and support legs for ensuring an insulating distance between the magnetic core-containing coil and the other parts on the face of the insulating wall facing the other parts. That's what happens.

[Industrial application field]

The present invention relates to a coil support device mounted on a printed circuit board, and more particularly to a coil support device with a toroidal magnetic core.

[Conventional technology]

Coils with magnetic cores used in electronic circuit components include toroidal-shaped coils with magnetic cores.For example, a coil with magnetic core for three-phase AC uses a toroidal core made of a magnetic material such as ferrite, and three cores in this toroidal core. It consists of three windings made of enamelled wire, etc., separated from each other and wound separately.

In such a coil with a magnetic core, it is necessary that adjacent windings be electrically isolated from each other in order to prevent phase-to-phase short circuits. Also,
Overseas standards for magnetic core coils require insulation intervals of a certain value or more in order to ensure insulation between windings. Similarly, with the coil,
In order to prevent this from short-circuiting with live parts of other components on the board, an insulating interval of at least a certain level is required.

FIGS. 6 and 7 show a conventional support device for a tridal-type magnetic core-containing coil, with FIG. 6 being a front view and FIG. 7 being a plan view thereof.

In the figure, reference numeral 1 denotes a printed circuit board having a wiring pattern 2, and on this printed circuit board 1, a coil 3 with a toroidal magnetic core is installed.

The magnetic core coil 3 includes a toroidal core 4 molded from a magnetic material such as ferrite, and three-phase windings 5a, 5b, and 5c wound around the toroidal core 4 in three separate sections in the circumferential direction. We are prepared. Moreover, in the central hole 4a of the toroidal core 4,
A spacer 6 having a Y-shaped cross section that separates each winding 5a to 5c so as to secure an insulation interval d is fitted inwardly, and the upper and lower ends of this spacer 6 protrude from both ends of the core by a certain amount or more. This length allows the bottom surface of the coil to be attached to the printed circuit board 1.
From the pattern 2 above, ensure an insulation interval L of at least a predetermined value, and connect the magnetic core coil 3 to the printed circuit board 1.
It is designed to support the top.

FIG. 8 is a front view showing another example of a conventional toroidal core-containing coil support device.

In the figure, a magnetic core coil 3 includes a toroidal core 4 and a three-phase winding 5 separately wound around the toroidal core 4.
a, 5b, 5c, and a toroidal core 4
A spacer 6 having a Y-shaped cross section is fitted into the central hole to isolate the windings 5a, 5b, and 5c. The magnetic core-containing coil 3 thus constructed is a ring-shaped insulating member 7 installed on the printed circuit board 1.
This insulating member 7 ensures an insulating distance L of a predetermined value or more between the lower surface of the coil and the printed circuit board 1.

[The problem that the idea aims to solve]

By the way, in the conventional supporting device for a coil with a magnetic core shown in FIGS. 6 and 7, the coil 3 with a magnetic core is connected to a printed circuit by simply fitting the spacer 6 into the center hole 4a of the toroidal core 4. Since it is supported on the substrate 1 to ensure the insulation interval L, the magnetic core coil 3 slides in the axial direction (arrow direction) of the spacer 6, making it impossible to maintain the insulation interval L and, in the worst case, In this case, the lower surface of the coil comes into contact with pattern 2.
Further, since there are variations in the winding of the winding around the core, there is a problem that the surface of the coil is not constant and the insulation interval L with respect to the pattern 2 is not constant.

Furthermore, in the conventional coil support device shown in FIG. 8, the ring-shaped insulating member 7 formed separately from the spacer is interposed between the coil surfaces facing the printed circuit board 1. A stable insulation interval L can be secured, but on the other hand, the insulation member 7 covers the coil and the surface facing it in a closed state, which obstructs the air flow and reduces the heat dissipation characteristics of the coil and printed circuit board. There was a problem that caused me to do this.

The present invention was developed in view of the above points, and it is possible to stably and reliably secure the insulation gap between the coil and other components facing it, and to ensure cooling of the coil and its mounting parts. An object of the present invention is to provide a coil support device.

[Means to solve the problem]

The coil support device of the present invention includes: a wire spacer between windings that is fitted into a central hole of a toroidal core constituting a coil containing a magnetic core and is wound around the toroidal core; Consisting of an insulating wall that isolates the coil from other parts facing the coil, and support legs on the face of the insulating wall facing the other parts to ensure an insulating distance between the magnetic core-containing coil and the other parts. This is what I did.

Additionally, the insulating wall is equipped with ventilation holes.

[Effect]

In the present invention, the insulating wall and the supporting legs ensure the necessary insulation distance between the magnetic core-containing coil and other parts facing it, and the supporting legs that come into contact with other parts ensure the distance between the insulating wall and the other parts facing it. The ventilation holes in the insulating wall create an airflow space for the coil, and the ventilation holes in the insulating wall create a flow of air to the coil to ensure cooling of the coil and other components.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

Embodiment FIGS. 1 and 2 show a first embodiment of the coil support device of the present invention. FIG. 1 is a perspective view of the entire coil support mechanism, and FIG. 2 is a printed circuit using the coil support mechanism. FIG. 3 is a cross-sectional view showing the mounting state on a board.

In the figure, 10 is a printed circuit board having a wiring pattern 11, etc., and 12 is a printed circuit board 1.
This coil 12 has a toroidal core and is mounted on a toroidal core 13 formed from a magnetic material such as ferrite.
3 in the circumferential direction of this toroidal core 13.
A winding 14a separated and individually wound into two parts,
14b and 14c.

The coil support mechanism 15 is for holding the magnetic core coil 12 on the printed circuit board 10 and ensuring an insulation interval between each winding and an insulation interval between the magnetic core coil 12 and the printed circuit board 10. Each winding 14a, 14b, 14 is fitted into the center hole 13a of 13 and adjacent to each other.
A spacer 16 having a Y-shaped cross section and separating each other by a predetermined insulating interval, and a donut disc-shaped spacer 16 which is connected to the lower end of this spacer 16 at right angles with their center axes aligned and supports the lower surface of the magnetic core coil 12. insulation wall 1
7, and are formed at predetermined intervals along the circumferential direction on the outer peripheral edge of the lower surface of the insulating wall 17 to ensure an insulating interval H between the lower surface of the magnetic core coil 12 and the printed circuit board 10 facing thereto. These support legs 18 also serve as spacers, and these are integrally molded from an insulating material such as plastic or ceramic, and the donut disk-shaped insulating wall 17
The outer diameter of is larger than the outer diameter of the magnetic core coil 12, and a large number of ventilation holes 17a are bored in the entire area in contact with the lower surface of the magnetic core coil 12.
The center hole 17b also functions for ventilation.

In the coil support device of this embodiment configured as described above, the toroidal core 1 is attached to the spacer 16.
3 through the center hole 13a of each winding 14a, 14b, 14
The magnetic core coil 12 is mounted on the coil support mechanism 15 so that the magnetic core coil 12 is fitted so that
After setting the support piece 18 of the coil support mechanism 15 to the coil mounting position on the printed circuit board 10, the coil can be mounted without considering the insulation gap H between the lower surface of the coil and the printed circuit board 10. The insulation interval H can be automatically set, and since the lower surface of the coil facing the printed circuit board 10 is supported by the donut-shaped insulation wall 17, the windings 14a to 14c can be easily set due to variations in the winding. Even if the lower surface of the coil is uneven, this does not affect the insulation interval H, and a constant insulation interval H can be stably maintained semi-permanently. Therefore, it is possible to design the pattern of the printed circuit board 10 without considering the insulation interval, contributing to high-density packaging.

Further, the coil support mechanism 15 has an insulating wall 17
Since the support legs 18 provided at desired intervals on the peripheral edge of the lower surface are brought into contact with the printed circuit board 10, an air passage is formed between the printed circuit board 10 and the insulating wall 17, and the insulating wall 17 Since there are a large number of ventilation holes 17b and the center hole 17a, air flows as shown by the arrows in FIG. will not deteriorate.

Embodiment FIGS. 3A and 3B show a second embodiment of the coil support mechanism of the present invention. FIG. 3A is an exploded perspective view of the entire structure, and FIG. 3B is a plan view of a spacer material.

In the figure, the coil support mechanism 15A includes a support body 19 that also serves as a coil spacer, and a support body 19 that also serves as a coil spacer.
A donut-shaped insulating wall 2 that is removably attached to the
0.

As shown in FIG. 3B, the support body 19 includes a square protrusion 21a at the center, and support pieces 21b extending horizontally on both sides of the lower end of the protrusion 21a.
21b, the lower edge of the projecting piece 21a, and the supporting piece 21
b, cut out the lower edge of 21b in a shape to support the support piece 2.
Protrusions 2 for forming air passages are provided at the extended ends of 1b and 21b.
A spacer material 21 made of a symmetrical vulcanized fiber or the like having 1c and 21c is bent at an angle of 120° as shown in FIG. It is constructed by fixing three pieces of material 21 back to back as shown in FIG. 3A.

The support body 19 obtained in this way has a Y-shaped spacer 19a to which a magnetic core-containing coil is attached and a support leg part 19b, and the Y-shaped spacer 19a has:
The central hole 20a of the insulating wall 20 is fitted as shown by the two-dot chain line, and the support leg 19b and the insulating wall 20 are
As in the case of the first embodiment, a necessary insulation interval H is formed between the lower surface of the coil and the printed circuit board. Further, a large number of ventilation holes 20b are bored in the coil-opposed surface of the insulating wall 20.

In this second embodiment, the same effects as in the first embodiment can be obtained.

FIG. 4 shows a printed circuit board 10 on which a magnetic core coil 12 is mounted using the coil support mechanism 15 (or 15A) shown in the first or second embodiment, and another board above the mounting surface. An example in which a component 23 is present will be shown.

In this embodiment, two of the coil support mechanisms 15 or 15A of the first or second embodiment are used, and one of the Y-shaped spacers 16 or 19a is toroidally inserted from the printed circuit board 10 side of the magnetic core coil 12. The other Y-shaped spacer 16 or 19a is fitted into the center hole 13a of the core 13.
and the other parts 23 side of the magnetic core coil 12 are inserted into the center hole 13a of the toroidal core 13, thereby sandwiching the magnetic core coil 12 from both upper and lower end surfaces, and placing the magnetic core coil 12 above the mounting surface. printed circuit board 10 on which other components 22 are present;
This is implemented above. Note that the height of the Y-shaped spacer 16 or 19a is set to about 1/2 of the dimension in the thickness direction of the coil 12 with a magnetic core.

In this example, since the coil support mechanism is attached to both end faces of the coil 12 with a magnetic core, it is possible to secure a certain insulation distance H between the coil and the printed circuit board 10 and other parts 23, and the coil , the cooling of the printed circuit board 10 and other components 23 is not impaired.

Embodiment FIG. 5 is a sectional view showing a third embodiment of the coil support device of the present invention.

In the figure, a coil support mechanism 15B for mounting the magnetic core coil 12 on the printed circuit board 10 is
As in the first embodiment (or second embodiment), the center hole 1 of the toroidal core 13 of the magnetic core coil 12
3a and a Y-shaped spacer 16 that isolates the windings 14a to 14c from each other, and a magnetic core-containing coil 1.
The insulating wall 17 includes an insulating wall 17 with a donut-shaped ventilation hole 17b on which the insulating wall 2 is placed, and supporting legs 18 formed on the periphery of the lower surface of the insulating wall 17 to ensure insulation spacing. An insertion hole 24 is formed through which the winding ends 141 of the windings 14a to 14c are inserted, and the winding ends 141 are inserted into the insertion holes 24.
is connected to a through hole or the like of the printed circuit board 10.

In the above embodiment, the winding end 1 of the coil
Since the positional relationship of 41 and the positional relationship of the printed circuit board 10 match, there is an effect that mounting of the spacer-equipped magnetic core coil on the printed circuit board 10 is facilitated.

Modifications of Embodiments In each of the embodiments described above, the printed circuit board 10
Although we have described a coil with a magnetic core that has three windings, the number of windings is not limited to three, and the present invention can be similarly applied to coils with more or fewer windings. .

Further, the spacer fitted into the center hole of the toroidal core is not limited to a Y-shaped spacer.

[Effect of idea]

As described above, according to the present invention, an insulating wall with a ventilation hole is provided at one end of the inter-line spacer inserted into the center hole of the toroidal core constituting the coil with a magnetic core, and the insulating wall is provided to isolate the coil surface from other parts. A support piece was provided on the wall facing other parts to ensure an insulating gap between the coil and other parts, and this was used as a support mechanism for the coil, so the coil and the printed circuit board facing it It is possible to stably and reliably secure the insulation spacing between other parts such as It becomes possible to design printed circuit board patterns without considering spacing, and high-density mounting becomes possible.

In addition, the insulating wall has ventilation holes, and air passages are formed between other parts and the insulating wall using support pieces, making it easy for air to circulate and ensuring cooling of coils, printed circuit boards, etc. It has the effect of

Furthermore, in a coil with a magnetic core in which the end of the winding is inserted through the coil support mechanism, the positional relationship of the end of the winding matches the positional relationship of the hole in the printed circuit board into which the end of the winding is inserted, making it difficult to mount the coil. It has the effect of making it easier.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a coil support device according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view showing an example of coil mounting using the coil support device of the first embodiment, and FIG. 3A is a perspective view of a coil support device according to a first embodiment of the present invention. FIG. 3B is a plan view of the spacer material;
FIG. 4 is a sectional view showing another coil mounting example using the coil support device of the first or second embodiment of the present invention;
FIG. 5 is a sectional view of a coil support device according to a third embodiment of the present invention, FIG. 6 is a front view of a conventional coil support device, FIG. 7 is a plan view of FIG. 6, and FIG. 8 is a conventional coil support device. FIG. 3 is a front view showing another example of the coil support device of FIG. In the figure, 10 is a printed circuit board, 12 is a coil with a magnetic core, 13 is a toroidal core, and 14a
~14c are windings, 15, 15A, 15B are coil support mechanisms, 16, 19a are Y-shaped spacers, 1
7 and 20 are insulating walls, 17a and 20b are ventilation holes, 1
7b, 20a are central holes, 18, 21b are support pieces,
19 is a support, 21 is a spacer material, 19b is a support leg, and 23 is other parts.

Claims (1)

[Claims for Utility Model Registration] (1) Inter-wire spacers 16, 1 between the windings that fit into the center hole of the toroidal core 13 constituting the magnetic core coil 12 and are wound around the toroidal core 13.
9a, an insulating wall 17, 20 that is located at one end of the line spacer 16, 19a and isolates the magnetic core coil 12 from other parts facing it, and the insulating walls 17, 20 facing the other parts. Support legs 18, 19b for ensuring an insulating interval between the magnetic core coil 12 and other parts on the surface
A coil support device comprising: and. (2) The coil support device according to claim 1, wherein the insulating walls 17, 20 are provided with ventilation holes.