JPH08162340A - Choke coil - Google Patents

Abstract

PURPOSE: To provide a quality-improved high-reliability choke coil having a high producibility and workability and enough insulation distance allowed between the core and winding, by securing the core, bobbin and winding, without using any adhesive agent or impregnant liq. CONSTITUTION: A bobbin has central flange 5 at the center, end flanges 16 at the ends, partition flanges 6, crossing grooves 7 and guides 7a between the flange 5 and 16. At the guides 7a of the grooves 7 are provided overlapping portions 24 of steps 27, and fitting parts 25 are formed at the flanges 16. Fitting part 26 is formed at the flange 5. The square tubular bobbin axially divided into equal halves, with leaving a tightening gap at the overlapping portions 24 when the right male and left female halves of bobbin are fitted. The bobbin is mounted on a central magnetic leg of a square-8-shaped core and winding is formed around the bobbin, square-O-shaped terminal board having vertical pin terminals is mounted on the core, and the ends of the winding are connected to the pin terminals to form a choke coil.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mounts a rectangular tubular winding frame on a core having a rectangular cross section such as a day-shaped core, a square-shaped core, an I-shaped core, an E-shaped core, and the like so that the magnetic legs are parallel to the mounting surface. The present invention relates to a structure of a board-mounted choke coil in which the core having a rectangular cross section is arranged laterally.

[0002]

2. Description of the Related Art In a conventional choke coil, as shown in FIG. 7, when a winding frame is combined with a letter-shaped core (hereinafter referred to as a core), a winding frame combination portion 71 is fitted. Four core support plates 21 project at both ends of the rectangular tube winding frame 2 and serve as stoppers for fitting the rectangular tube winding frame 2 (hereinafter referred to as a winding frame) so that the core supporting plate 21 is installed on the plane in the minor axis direction of the core. Has become.
The end flange 16 is sized so as to be inscribed inside the core 1, and is fitted into the core. The central collar 5, the partition collar 6, and the end collar 16 are all for partitioning and winding the winding. The crossover groove 7 and the guide portion 7a are for guiding and holding the central magnetic leg of the core 1.

When the core 1 is installed in the conventional reel 2,
The winding frame combination portion 71 is short, and the two divided winding frames 2 face each other and are pushed into the core, so that the core 1 and the winding frame 2 are assembled with a gap therebetween.

[0004]

As described above, the core 1
The reason for providing the gap between the winding frame 2 and the winding frame 2 is that there are variations in the dimensions of the core, and if the gap between the core 1 and the winding frame 2 is small, the core may not enter if there is a constant gap. Also, if the gap between the core 1 and the bobbin 2 is made large and constant, rattling occurs. In any case, if the cores are selected and used, it will be troublesome and the yield will be deteriorated.Therefore, in order to prevent the cores from being selected, the size of the hole of the reel into which the core is inserted must be increased. Not in the present situation. Since the core 1 and the winding frame 2 are assembled with a gap, there is a problem that the winding is loosened or the core and the winding frame rattle due to the above-mentioned gap. Therefore, a sufficient insulation distance cannot be secured between the core and the winding frame, and the core, the winding frame, and the winding are fixed using an adhesive or an impregnating liquid. Materials such as an adhesive and an impregnating liquid are required for this fixing, and the strength and the like vary depending on the usage state of the adhesive and the impregnating liquid, which affects the quality and lowers the yield. Also, it takes time to work,
There were drawbacks in productivity and reliability.

According to the present invention, the core, the winding frame and the winding are fixed without using an adhesive or an impregnating liquid to the core, the winding frame and the winding, so that the productivity and workability are improved, and the core and the winding are It is an object of the present invention to provide a choke coil having a sufficient insulation distance, improved quality, and high reliability.

[0006]

As a means for solving the above-mentioned drawbacks, the present invention provides a central collar at the center of the bobbin, end collars at both ends of the bobbin, and a central collar and an end collar. A rectangular tube winding frame having a partition flange, a crossover groove, and a guide section, which is divided into two equal parts in the length direction, is attached to the central magnetic leg of the date-shaped core, and the rectangular tube winding frame is wound. In the choke coil in which the square-shaped terminal block with the pin terminals vertically attached is assembled to the date-shaped core and the ends of the windings are connected to the pin terminals, the guide portion of the crossover groove and the weight portion, and A fitting part is provided on the end flange and a fitting part is provided on the central flange to fit the right and left halves of the rectangular tube winding frame, and a tightening gap is formed in the overlapping part to provide an insulation distance. It is a choke coil characterized in that the rectangular tube winding frame is wound around a core and tightened on the core.

[0007]

When the reel of the present invention is installed on the core, the reel shown in FIG.
As shown in FIG. 2, the overlapping portion 2 of the left and right winding frame combination portions, that is, the guide portions 7a of the core of the winding frame which are internally proposed.
4, the fitting portion 25 of the end flange 16 and the fitting portion 26 of the central flange 5 are left and right male and female fitting types, which is longer than the conventional product. For this reason, when the reel 2 is pushed into the core,
There are overlapping parts on the left and right reels, and the parts are mounted by overlapping like male and female.

As shown in FIG. 3, a pair of left and right reels 2 divided into two parts is a male and female fitting type, and a reel combination portion 7 is provided.
1 has a tightening gap t by forming a portion 24 which overlaps with each other. When the fitting and combination are performed, the overlapping portions 24 are fitted with each other. The tightening gap t is tight. Therefore, it is fixed without rattling or loosening.

It should be noted that the overlapping portion 24 of the winding frame combination portion 71 can be easily designed to have a size that secures the insulation distance between the winding and the core, and a sufficient insulation distance that falls within the UL and IEC standards can be secured.

By providing the tightening gap t within the variation range of the core, it is not necessary to process or sort the core even if there is variation in the dimensional tolerance of the core, and the productivity is improved and the yield is improved.

[0011]

Embodiments of the present invention will be described with reference to the drawings.

An external perspective view of an embodiment of the choke coil according to the present invention is shown in FIG. In this choke coil, two windings 3 and 4 are simultaneously wound around the winding frame 2 mounted on the central magnetic leg of the core 1 by winding both ends to form a winding on the winding frame. It is an example of a common mode choke coil using a winding frame of a horizontal board mounting type in which a square-shaped terminal block 8 in which a rectangular terminal block is combined is assembled.

As shown in FIG. 5, the winding frame 2 is divided into two parts having the same shape and the same size, and is provided with an end flange 16, a central flange 5 and a partition flange 6 in the winding. The outer shapes of the three brims are substantially square. On the outer surface of the end flange 16 are provided four square core support plates 21 (six out of eight are shown in the figure) extending from the corner of the winding frame to the side edges in parallel with the split surface.
On the same surface as the core support plate 21, two small protrusions 17 (only two are shown) are provided on the end flange surface at a central portion apart from the outer surface of the core support plate. The width dimension of the core support plate 21 (in the longitudinal direction of the central magnetic leg of the winding frame 2) is such that the outer surface thereof is substantially flush with the outer peripheral surface of the core 1. The partition collar 6 is provided with a crossover groove 7 reaching the outer peripheral surface of the winding frame.

The reel 2 of the present invention is of a male and female fitting type which is divided into two parts on the left and right. As shown in FIG. 5, the central magnetic leg of the core is housed and has a crossover groove 7 and a guide portion 7a for mounting the inner draft. The step portion 27 is provided on the guide portion 7a,
When the left and right reels 2 are attached to the core, the overlapping portions 24 of the guide portion 7a for designing the cores of the left and right reels are overlapped with each other and are fitted into a male-female shape. Similarly, the fitting portion 2 of the end collar 16
5, the fitting portion 26 of the central collar 5 also has a left and right male-female fitting shape and has step portions.

As shown in FIG. 4, as described above, the left and right male and female reels 2 are the overlapping portions 2 of the reel combining portion 71.
When they are left-right fitted and united by 4, they are mounted with a tightening gap t. After that, when the winding 4 is applied to a predetermined portion of the winding frame, the winding force of the winding is tightened and fixed from the arrows 9a and 10a.

Assuming that the thickness of each overlapping portion 24 of the winding frame 2 is T, the dimension of T is designed to be an insulation distance sufficiently satisfying the UL or IEC standard. This allows the insulation distance between the core and the winding to be easily formed.

As described above, the left and right two-divided bobbin is tightly attached to the central magnetic leg of the core 1 so that the bobbin 2 and the winding are fixed to the core.

As shown in FIG. 6, when the winding frame 2 is mounted on the central magnetic leg (not shown) of the core 1, the inner surface of the core support plate 21 opposes the magnetic path portion of the main surface of the core 1 from both sides. Then, the rotation of the winding frame 2 assembled to the core 1 around the central magnetic leg is prevented, and by grasping the assembled product of the core 1 and the winding frame 2 with the chuck from above the core support plate 21, When the winding material wound by the chuck is wound around the winding frame 2, the core 1
Damage is prevented.

The square-shaped terminal block 8 shown in FIG. 1 is divided into two parts as shown in FIG.
As shown together with the winding winding in which the winding is wound around the winding frame 2 assembled to the core 1, it is composed of two U-shaped terminal block pieces 10 of the same shape and the same size. The U-shaped terminal block piece 10 is provided with a fitting plate piece 11 and a locking piece 12 on one split end surface, a fitting groove 13 and an engagement hole 14 on the other split end surface, and is wound at both ends at both ends. A pin terminal 9 for bending the wire end portion and for mounting and fixing it on the substrate is provided vertically, and a guide groove 23 having the same depth as the thickness of the core support plate 21 and the same width as the side length of the end collar 16 is provided on the upper surface.
And a fitting recess 15 that fits into a small protrusion 17 attached to the outer surface of the end collar 16 is provided on the inner surface.

Since it is the square-shaped terminal block 8 having such a structure, as shown in FIG. 2, all the winding ends 22 of the windings 3 and 4 are extended downward and separated by a wire chuck (not shown). While being held, the U-shaped terminal block pieces 10 are butt-assembled along the bottom surface of the winding-up core 1, and at the same time, the small projecting pieces 17 are fitted into the fitting recesses 15 so that the U-shaped terminal block pieces 10 can be connected to each other. The pieces are formed into square-shaped terminal blocks 8. Therefore, the winding frame 2 is assembled to the core, the square-shaped terminal block 8 is assembled to the winding upstream of the winding frame, and then the winding end portion which is still gripped by the wire chuck is twisted to the pin terminal 9. Can be stopped. Since the choke coil has such a configuration, it is not necessary to temporarily fix the winding end part during the assembly of the choke coil, there is no fear of loosening the winding, the core, the winding frame, the winding and the square-shaped terminal block. Easy to assemble.

[0021]

EFFECTS OF THE INVENTION By fixing the core, the winding frame and the winding without using an adhesive or an impregnating liquid on the core, the winding frame and the winding, the productivity and workability are improved and It is possible to provide a choke coil having a sufficient insulation distance, improved quality, and high reliability.

[Brief description of drawings]

FIG. 1 is an external perspective view showing an embodiment of a choke coil according to the present invention.

FIG. 2 is an exploded perspective view of the choke coil shown in FIG. 1, illustrating the assembly of a U-shaped terminal block piece, which is a square terminal block, into a rectangular tubular winding frame that is wound up.

FIG. 3 is a cross-sectional view of a rectangular tube winding frame and a date-shaped core of the choke coil of the present invention.

FIG. 4 is a cross-sectional view of the choke coil of the present invention in which the date-shaped core and the rectangular tubular winding frame are wound.

5 is an exploded perspective view of the choke coil shown in FIG. 1, showing an assembly of a rectangular tubular winding frame divided into two date-shaped cores.

6 is an external perspective view showing the assembling of the date-shaped core and the rectangular tubular winding frame in the choke coil shown in FIG. 1. FIG.

FIG. 7 is a perspective view of a conventional choke coil.

[Explanation of symbols]

 1 Day-shaped core 2 Square tube winding frame 3, 4 Winding 5 Central collar 6 Partition collar 7 Crossover groove 8 B-shaped terminal block 9 Pin terminals 9a, 10a Arrows 10 U-shaped terminal block piece 11 Fitting plate piece 12 Locking piece 13 Fitting groove 14 Engagement hole 15 Fitting recess 16 End flange 17 Small protrusion 21 Core support plate 22 Winding end 23 Guide groove 71 Winding frame combination part 7a Guide part 24 Overlapping part 25, 26 Fitting part 27 Step T Thickness of overlapping parts t Tightening clearance

Claims (1)

[Claims] 1. A center collar at the center of the reel, end collars at both ends of the reel, a partition collar between the center collar and the end collar, and a crossover groove,
A rectangular tubular bobbin having a guide portion and divided into two equal parts in the length direction is attached to the central magnetic leg of the date-shaped core, the rectangular tubular bobbin is wound, and a pin terminal is hung vertically. In a choke coil in which a terminal block is assembled to a date-shaped core and an end portion of a winding is connected to a pin terminal, a weight portion is formed in a guide portion of the crossover groove, a fitting portion is formed in the end collar, and the center portion is formed. The flange is provided with a fitting portion, the right and left halves of the rectangular tubular frame are fitted together, a tightening gap is formed in the overlapping portion to provide an insulation distance, and the winding is wound to attach the rectangular tubular reel to the core. A choke coil characterized by being tightened.