JP2598308Y2 - Induction magnet - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction magnet such as a reactor, a high-frequency choke and a transformer.

[0002]

2. Description of the Related Art Conventionally, in an iron core type reactor in which a two-legged core is inserted into two bobbins, each bobbin is not positioned with respect to each other. Are easily displaced from each other. For this reason, it is not easy to assemble the core, and the workability of assembling is poor. Therefore, the main purpose of the present invention is to provide an induction magnet with an easy integration of the core.

In a reactor in which two bobbins are arranged, one terminal pin is provided on each of the two bobbins. However, since only the terminal pins lack stability, they are mounted on a wiring board. Can not. Therefore, since the reactor is mounted on the chassis that supports the wiring board, the number of assembly steps is increased, and the number of parts is increased, resulting in an increase in cost. Therefore, another object of the present invention is to provide an induction magnet which can be easily mounted on a substrate.

[0004] Particularly, in the case of a large-sized reactor or transformer having a weight exceeding 300 g, it is not easy to mount it on the substrate. Therefore, still another object of the present invention is to make it possible to mount a large-sized induction magnet on a substrate.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the invention of claim 1 is based on an induction electromagnetic device in which legs of a core are inserted into a pair of cylindrical bobbins around which coils are wound. A plurality of engaging portions that engage with each other to position the bobbins with each other are provided on flange portions at axial ends of the bobbins.

According to the first aspect of the present invention, since the engagement portions provided on the flange portion engage with each other and the two bobbins are positioned with respect to each other, the core can be easily inserted.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, one or more mounting pins are provided on the flange portion of each bobbin in addition to the terminal pins for external connection. , These pins are inserted through holes in the substrate.

According to the invention of claim 2, mounting pins different from terminal pins for external connection are provided, and two pins are provided on one bobbin, and a plurality of pins are provided on the substrate for one bobbin. Since it is inserted, each bobbin can be mounted on the board.

According to a third aspect of the present invention, in addition to the configuration of the second aspect, a female screw is provided on a flange portion of each bobbin, and a male screw penetrating the substrate is screwed into the female screw.
Each of the bobbins is fixed to a substrate.

According to the third aspect of the present invention, since the bobbin is fixed to the board by screws in addition to the pins, the induction magnet can be mounted on the board even with a large induction magnet.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment. In FIG. 1, this induction magnet is composed of a pair of core divided bodies 1A and 1B.
And first and second bobbins 2A and 2B, and first and second coils 3A and 3B.

Each of the first and second bobbins 2A, 2B has a through hole 21 for inserting a core into which the pair of middle legs 11 of the core split bodies 1A, 1B is inserted. Each bobbin 2A, 2B
Upper flange portion 22 at the end of bobbin 2A, 2B in axial direction S
The lower flange 23 has a pair of winding projections 24A and 24B and terminal pins 25A and 25B, respectively. The first and second bobbins 2A and 2B have the same shape, and as shown in FIG. 2, are provided on the upper flange portion 22 and the lower flange portion 23 respectively with a cylindrical engaging convex portion 26 and a circular cross section. A plurality of engagement recesses 27 are provided, and the engagement protrusion 26 of one bobbin 2A, 2B is
The two bobbins 2A and 2B are positioned with respect to each other by fitting into the engaging recesses 27 of B and 2A. In addition, both bobbins 2
A and 2B are formed with conductive wire guiding grooves 29 near the terminal pins 25A and 25B.

The first coil 3A wound around the first bobbin 2A in FIG. 1 has a winding start end 31 having a first terminal pin 25A.
On the other hand, the second coil 3B wound around the second bobbin 2B has its winding end 32 tied to the second terminal pin 25B and soldered. The first lead portion 33 of the first coil 3A, that is, the end of winding, is tied to the first winding protrusion 24A, while the second lead portion 34 of the second coil 3B, ie, The winding start end is tied to the second winding kinking projection 24B. The two coils 3A, 3B are formed by one continuous conducting wire via the two lead portions 33, 34. This induction magnet is a reactor, and both coils 3A and 3B are wound so as to generate reactances of the same polarity.
A, 25B are soldered to a board (not shown), and the coils 3A, 3B are connected to a wiring pattern for external connection of the board.
Are connected.

In the above configuration, the pair of bobbins 2 shown in FIG.
A and 2B are provided with an engaging convex portion 26 and an engaging concave portion 27 which are fitted to each other.
2B are positioned relative to each other. Therefore, the pair of middle legs 11 of the core divided bodies 1A and 1B of FIG.
Can be easily inserted into the through-hole 21 of the first embodiment. As a result, the assemblability of the induction magnet is improved.

FIGS. 4 and 5 show a second embodiment. FIG.
In the second embodiment, in addition to the terminal pins 25A and 25B provided on the lower flange portion 23, mounting pins 28A and 28B are provided on the upper flange portion 22 on each of the bobbins 2A and 2B. . The terminal pins 25A and 25B and the mounting pins 28A and 28B are respectively connected to the substrate 4 shown in FIG.
Terminal holes 40A, 40B and mounting holes 41A, 41
B and soldered to the substrate 4.

The terminal pins 25A and 25B are electrically connected to a wiring pattern 44 for external connection formed on the substrate 4, and are pins for inputting / outputting commercial power. On the other hand, the mounting pins 28A and 28B are not directly connected to the external connection wiring pattern 44. Other configurations are the same as those of the first embodiment of FIG. 1, and the same or corresponding portions are denoted by the same reference numerals and detailed description thereof will be omitted.

In the second embodiment, each bobbin 2 shown in FIG.
A and 2B are provided with mounting pins 28A and 28B different from the terminal pins 25A and 25B, so that each bobbin 2A and 2B is provided with two pins 25A and 28A or 25B and 28B. Pins 25A, 25B, 28
Each of the bobbins 2A, 2B can be mounted on the board 4 by soldering the A, 28B to the board 4. Therefore, it is not necessary to attach the reactor to the chassis or the like, so that the assemblability is improved, the number of parts is reduced, and the cost can be reduced. Furthermore, since no chassis is required, the electrical equipment is compact.

FIGS. 6 and 7 show a third embodiment. FIG.
In the third embodiment, the bobbins 2A and 2B are not provided with the winding projections 24A and 24B shown in FIG. 4, and the draw-out portions 33 and the draw-out portions of both the coils 3A and 3B shown in FIG. The portions 34 are wrapped around the mounting pins 28A and the mounting pins 28B, respectively. A wiring pattern 42 for connecting the coils 3A and 3B is formed on the substrate 4. The mounting pins 28A and 28B are not directly connected to the above-described wiring pattern 44 for external connection, but are soldered to the substrate 4 so that the coils 3A and 3B
It is connected to a wiring pattern 42 for connection between B. Note that, without providing the wiring pattern 42 for connection between the coils 3A and 3B, the leading portions 33 and the leading portions 34 of both the coils 3A and 3B are provided.
May be connected to each other by another wiring material such as a copper wire. The other configuration is the same as that of the second embodiment.

FIGS. 8 and 9 show a fourth embodiment. FIG.
In the fourth embodiment, a female screw 22a is formed on the upper flange 22 of each of the bobbins 2A and 2B. A screw (male screw) 5 that passes through the screw insertion hole 43 of the board 4 is screwed into the female screw 22a, and the bobbins 2A, 2B
Is fixed to the substrate 4. Reference numeral 35 denotes a wiring member which is wrapped around the two mounting pins 28A and 28B,
A and 3B are connected. The other configuration is the same as that of the third embodiment in FIGS. 6 and 7, and the same or corresponding portions are denoted by the same reference characters and detailed description thereof will be omitted.

According to the fourth embodiment, each bobbin 2A,
2B besides both pins 25A, 25B, 28A, 28B,
It is fixed to the substrate 4 by screws 5. Therefore, the impact resistance is significantly improved, so that the reactor can be mounted on the substrate 4 even if the reactor is large.

In each of the above embodiments, as shown in FIG. 2, the engaging portion is constituted by a cylindrical engaging convex portion 26 and an engaging concave portion 27 having a circular cross section. Recess 2
7. However, in the present invention, the engaging portions do not need to be fitted into each other, and the engaging portions may be formed by step portions that engage with each other. Further, the engaging projection 2
The shapes of the recess 6 and the engagement recess 27 are not limited to those in the above embodiments. One example is shown in the fifth embodiment in FIGS.

FIG. 10 shows the first bobbin 2A. FIG.
As shown in (a), (b) and (d), the first bobbin 2A
In the upper flange portion 22 and the lower flange portion 23, respectively,
A pair of the engaging convex portion 26 and the engaging concave portion 27 are formed. As shown in FIG. 10A, the engaging projection 26 and the engaging recess 27 are hook-shaped and
8A and the terminal pins 25A (FIG. 10 (c)) are provided along the opposite end faces 22a and 23a. As shown in FIGS. 11A and 11B, the engaging projection 26 and the engaging recess 27 are engaged with each other.

One of the three mounting pins 28A is wound with a lead portion of a wiring material or a coil, similarly to the embodiment of FIG. 7 or FIG. Other configurations of the fifth embodiment are the same as those of the above-described embodiment of FIG. 7 or FIG. 9, and the same or corresponding portions are denoted by the same reference characters and description thereof will be omitted.

In this embodiment, as shown in FIG. 11, three mounting pins 28A are provided in addition to the terminal pins 25A and 25B. Therefore, even if the screw 5 of the embodiment shown in FIG. There is an advantage that the bobbins 2A and 2B of FIG. 11 can be easily and firmly fixed to the substrate.

In the embodiments of FIGS. 1 to 9 as well, it goes without saying that the shapes, structures and the like of the engaging projections 26 and the engaging recesses 27 may be as shown in FIG.

In the above embodiment, the case where the induction electromagnetic device is a reactor has been described.
The present invention is also applicable to other induction magnets such as high-frequency chokes and transformers. The female screw 22a formed on the bobbins 2A, 2B in FIG. 9 is prepared by forming a pilot hole in the bobbins 2A, 2B in advance and screwing the male screw 5 during assembly.
A thread may be formed. The shape of the core does not need to have the four legs shown in FIG.
It goes without saying that the present invention is also applied to an I-type core.

[0027]

As described above, according to the invention of each claim, the engagement portions provided on the flange portions of the respective bobbins engage with each other, and the two bobbins are positioned with respect to each other. Can be easily inserted, and assemblability of the induction magnet is improved.

According to the invention of claim 2, mounting pins are provided on each bobbin in addition to the terminal pins for external connection.
Since the bobbin is mounted on the board with both the terminal pins and the mounting pins, no chassis is required, the number of assembling steps is reduced, the number of parts is reduced, and the cost can be reduced.

According to the third aspect of the present invention, since the bobbin is attached to the board by screws other than the pins, the shock resistance is remarkably improved. Therefore, even a large induction magnet is directly mounted on the board. can do.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a reactor showing a first embodiment of the present invention.

FIG. 2 is a perspective view of a pair of bobbins.

FIG. 3 is a perspective view showing a reactor.

FIG. 4 is a perspective view of a pair of bobbins showing a second embodiment.

FIG. 5 is a perspective view showing a reactor.

FIG. 6 is a perspective view of a pair of bobbins showing a third embodiment.

FIG. 7 is a perspective view showing a reactor.

FIG. 8 is a perspective view of a pair of bobbins showing a fourth embodiment.

FIG. 9 is a perspective view showing a reactor.

FIGS. 10A and 10B show a bobbin according to a fifth embodiment, wherein FIG. 10A is a plan view, FIG. 10B is a side view, FIG. 10C is a view taken along line c-c of FIG. FIG.

FIG. 11 is a perspective view showing a pair of bobbins.

[Explanation of symbols]

1A, 1B ... core, 11 ... middle leg, 2A, 2B ... bobbin,
22a ... female screw, 22, 23 ... flange, 25A, 25B ...
Terminal pins, 26: engaging protrusion, 27: engaging recess, 28
A, 28B: mounting pins, 3A, 3B: coil, 4: board, 40A, 40B, 41A, 41B: hole, 5: male screw, S: axial direction.

Continued on the front page (72) Inventor Shizuta Asao 1-12-22 Moundoshima, Nishiyodogawa-ku, Osaka Tabuchi Electric Co., Ltd. (58) Field surveyed (Int. Cl. ⁶ , DB name) H01F 27/06 H01F 27 / 28 H01F 27/32 H01F 37/00

Claims (3)

(57) [Scope of request for utility model registration] 1. An induction electromagnetic device in which a core leg is inserted into a pair of cylindrical bobbins around which coils are wound, wherein a plurality of engaging portions which engage with each other to position the bobbins with each other are provided. An induction electromagnetic device provided on a flange portion at an axial end of the induction electromagnetic device. 2. The bobbin according to claim 1, wherein one or more mounting pins are provided on the flange portion of each of the bobbins in addition to the terminal pins for external connection, and each of these pins is provided in a hole of the board. An induction magnet that has been inserted. 3. The induction electromagnetic device according to claim 2, wherein a female screw is provided on a flange portion of each bobbin, and a male screw penetrating the substrate is screwed into the female screw, and the bobbin is fixed to the substrate. .