JPH0115141Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an inductor using a magnetic core constructed by laminating sheet-like magnetic materials such as amorphous alloys. In the present invention, an inductor has a magnetic core and one or more coils coupled to the magnetic core, and utilizes self-induction or mutual induction phenomena in the coils,
For example, it includes a choke coil, a transformer, etc.

Prior Art Conventionally, ferrite has been well known as a magnetic core material for inductors such as chiyoke coils and transformers, but recently, magnetic cores using amorphous alloys have been attracting attention. The magnetic core made of amorphous alloy has a high squareness ratio in the B-H curve, has a significantly small coercive force, has low core loss, and can suppress temperature rise, so it can be miniaturized. When used as the magnetic core of inductors for power supply circuits, it has excellent advantages such as improved efficiency, wide range voltage control, and stable temperature characteristics. It is expected to be a means to improve efficiency and performance.

By the way, amorphous alloys usually have a sheet shape (ribbon shape) depending on the manufacturing method. For this reason, when an amorphous alloy is used as a magnetic core, unlike magnetic materials such as ferrite, the core cannot take any arbitrary shape, and usually has a toroidal shape. When a toroidal magnetic core is used, a completely closed magnetic path is formed, which has the advantage of having small leakage magnetic flux and an inductor with good high frequency characteristics, but there is no gap for the winding to pass through.
Winding must be done by hand or by mechanical winding such as a chatter method, which makes the winding work extremely troublesome. There are disadvantages such as the inability to use it as an inductor that needs to be adjusted.

In order to eliminate the drawbacks of this toroidal magnetic core, the core 1 is divided into two core members 101 and 102, as shown in FIG.
An inductor having a structure in which the end faces of 01 and 102 are opposed to each other with a magnetic gap G interposed therebetween can be considered. In the case of such a structure, the bobbin 3 on which the winding 2 has been applied in advance
Since the ends of the core members 101 and 102 can be inserted and assembled from both ends of the wire, the winding work becomes very easy, and since there is a magnetic gap G, the magnetic characteristics of the magnetic path can be adjusted. Benefits such as becoming

Problems with the Prior Art However, the inductor having the structure shown in FIG. 1 has a structure in which the core members 101 and 102 are formed by laminating sheet-like magnetic materials such as amorphous alloys. The core members 101 and 102 are deformed during or after assembly due to their return spring properties, and it is difficult to maintain them in a predetermined shape. Therefore, fluctuations in the magnetic gap G and resulting changes in magnetic properties, etc. There are problems such as being easy to invite. Particularly in this type of inductor, the magnetic gap G usually needs to be managed to have a minute interval of several tens to hundreds of micrometers, and the structure described above cannot meet this demand.

Purpose of the present invention Therefore, the present invention aims to provide a simple and easy-to-use method that can be used while maintaining the core member in a predetermined shape when constructing a magnetic core by combining two or more core members constructed by laminating sheet-like magnetic materials such as amorphous alloys. The magnetic gap formed between the core members can be maintained at an accurate value, and it can be mounted in either a vertical or horizontal position when mounted on a board, etc. The purpose of the present invention is to provide an inductor that can be handled conveniently.

Configuration of the Present Invention In order to achieve the above object, the present invention provides an inductor including two non-magnetic cases, two core members housed in each of the non-magnetic cases, and a coupling spring, Each of the two non-magnetic cases has a groove formed as a U-shaped curved path, and a flat portion provided on the outer peripheral surface corresponding to the curved path portion of the groove, and the two cores The member is a laminate of sheet-like magnetic materials made of an amorphous alloy, is housed in the groove of the non-magnetic case and is held in a shape that follows the groove shape, and the end face is They are combined so as to face each other to form an annular magnetic path, and the spring applies a tensile force for coupling between the two non-magnetic cases.

Embodiment FIG. 2 is a front sectional view of an inductor according to the present invention, FIG. 3 is a sectional view taken along line A--A in FIG. 2, and FIG. 4 is an exploded view. In the figure,
The same reference numerals as in FIG. 1 indicate identical components. 4 and 5 are core members 101 and 10
This is a non-magnetic case that stores each of the two separately. In this embodiment, each of the non-magnetic cases 4 and 5 is formed of a suitable synthetic resin or the like into substantially the same shape with a U-shaped groove 41 or 51 serving as a storage part, and both end surfaces thereof are left open. There is. Two core members 101 and 102 formed by laminating an appropriate number of sheet-like magnetic materials such as amorphous alloy or silicon steel plates are fitted and housed inside the grooves 41 and 51 of the non-magnetic cases 4 and 5. There is. Therefore, the core members 101 and 102 are stored inside the grooves 41 and 51 in a U-shaped state that follows the shapes of the grooves 41 and 51 of the non-magnetic cases 4 and 5, and the end surfaces thereof are It will be exposed to the outside from the open end surface A of the non-magnetic cases 4 and 5. 6 and 7 are lids that close one side of the non-magnetic cases 4 and 5. Although not shown, core members 101 and 1 are provided inside the non-magnetic cases 4 and 5.
After storing the core members 101 and 102 in the non-magnetic cases 4 and 5, the core members 101 and 102 are filled with synthetic resin etc.
It is possible to prevent the positional shift of the magnetic gap G and the dimensional variation of the magnetic gap G.

As described above, if the core members 101 and 102 are housed inside the non-magnetic cases 4 and 5, the core members 101 and 102, which tend to disintegrate into pieces due to their own springiness,
The shape is constrained to follow the shape of the grooves 41 and 51 of the non-magnetic cases 4 and 5. Therefore, the technical difficulty described above when forming a magnetic core of a predetermined shape using a sheet-like magnetic material such as an amorphous alloy can be solved.

In addition, since the members 101 and 102 are laminated sheets of magnetic sheets made of amorphous alloy, if they are forcibly bent so as to create a flat part, distortion will remain and the magnetic properties will deteriorate; however, in the present invention, U-shaped curved grooves 41 and 51 are formed in the nonmagnetic cases 4 and 5, and the core members 101 and 102 are inserted into the grooves 4 and 5.
Since it is held in a U-shape according to the shape of Nos. 1 and 51, the magnetic properties do not deteriorate due to excessive bending, and the excellent magnetic properties of the amorphous alloy can be fully exhibited.

When storing the core members 101 and 102 in the non-magnetic cases 4 and 5, the core members 101 and 102 are stored so that the open end surface A of the non-magnetic case 4 or 5 does not protrude forward from the end surface B of the core member 101 or 102. . In this embodiment, the non-magnetic cases 4 and 5 are housed in such a state that the opening end faces A of the non-magnetic cases 4 and 5 substantially coincide with the end faces B of the core members 101 and 102. In this way, if the structure is such that the open end surface A of the non-magnetic case 4 or 5 is housed so as not to protrude forward from the end surface B of the core member 101 or 102, the core member 101
When the end face rollers of core members 101 and 102 are opposed to each other to form a magnetic gap G between them, the dimensions of the magnetic gap G are set to Since it becomes possible to determine the distance between the end face roller and the roller, the dimensional accuracy of the magnetic gap G increases,
Gap management becomes easier. Suppose that the core members 101 and 102 are arranged in such a manner that the opening end face A is in front of the end face B of the core member 101 or 102.
02 is housed in the non-magnetic cases 4 and 5, the open end faces A and A of the non-magnetic cases 4 and 5 will come into contact with each other, and the distance between the magnetic gaps G will be equal to the amount of protrusion of the open end faces A and A. Therefore, it becomes impossible to adjust the magnetic gap G and thereby adjust the magnetic characteristics. The magnetic gap G may be formed as a gap, but it is preferably formed by filling it with a medium such as synthetic resin. This is because the dimensions of the magnetic gap G can be precisely determined according to the thickness of the filling medium at the same time as assembly.

When mounting the inductor on a substrate or the like, it is usually arranged horizontally so that the linear portion facing the coil 2 faces the substrate side. This is because the installation stability of the inductor is good. However, depending on the condition of the board, it may not be possible to mount it horizontally due to the relationship with other mounted components. Therefore, in the present invention, the outer circumferential surfaces of the bent portions of the grooves 41 and 51 are extended by an appropriate length in the tangential direction, and the flat portions 42 and 52 are provided in series, respectively. The coil 2 is attached to a position where at least one of the above remains. The coil 2 is attached to a position where at least one of the flat portions 42, 52 remains. With such flat parts 42 and 52, it is possible to make the flat parts 42 or 52 face the board and mount it vertically, so there is no need to reduce the mounting area on the board. This is really convenient in certain cases.
Moreover, the flat parts 42 and 52 are arranged in the non-magnetic case 4,
5, the core member 1 is a laminate of sheet-like magnetic materials made of an amorphous alloy.
01, 102 to U according to the shape of the grooves 41, 51.
Support stability can be increased while maintaining the shape. Therefore, it is possible to improve the support stability without deteriorating the magnetic properties of the core members 101 and 102 made of amorphous alloy.
The number of flat portions 42 and 52, their formation positions, etc. can be appropriately selected depending on the external shape of non-magnetic cases 4 and 5. For example, if the non-magnetic cases 4 and 5 have a circular outer shape, three to four locations may be provided.

The non-magnetic cases 4 and 5 house the core members 101 and 102, respectively, and insert one end into the inside of the coil 2 from both sides, align the end surfaces with each other, and are held together by the springs 8 and 9. join to. In this embodiment, protrusions 43 and 53 are provided on the outer surfaces of the bottoms of the non-magnetic cases 4 and 5, respectively, and similar protrusions 6 are provided on the outer surfaces of the lids 6 and 7.
1 and 71, respectively, and the protrusions 43-53
A spring 8 or 9 is connected between 61 and 71 to connect the non-magnetic cases 4 and 5 to the core member 101,
102 and are integrally assembled. With such a structure, it can be assembled by simply hooking the springs 8 and 9, so the assembly work is simplified. In addition, core member 101-1
There is also an advantage that the elasticity of the springs 8 and 9 can be easily adapted to inductors having different gap sizes between the springs 8 and 9. Moreover, since an appropriate constant tensile force can be applied between the core members 101 and 102 by the springs 8 and 9, the dimension of the gap G can be maintained at a constant value over a long period of time. Furthermore, as shown in the embodiment, by locating the springs 8 and 9 within the side surfaces of the non-magnetic cases 4 and 5,
Since it is possible to eliminate the protrusion toward the outer periphery that serves as the mounting surface of the non-magnetic cases 4 and 5, the inductor can be easily mounted on a substrate or the like.

Furthermore, in this embodiment, the non-magnetic cases 4 and 5
Frame portions 44 and 54 are integrally provided on the outer periphery of one end, and the coil 2 is connected using the frame portions 44 and 54 as a bobbin.
It has a structure in which it is wrapped with With this structure, a bobbin dedicated to winding is not required, so the number of parts is reduced and the size is reduced. Note that the number of coils 2 is not limited to one, and a plurality of coils may be provided. The shapes of the non-magnetic cases 4 and 5 and the core members 101 and 102 are not limited to those shown in the embodiments, but can take various forms depending on the number of windings. In addition, since the above embodiment shows an example of an inductor used as a chiyoke coil, the coil 2
Although there is only one, two or more may be provided when realized as a transformer.

Effects of the present invention As described above, according to the present invention, the following effects can be obtained.

(a) Each of the two non-magnetic cases has a groove formed as a U-shaped curved path, and the two core members are a laminate of sheet-like magnetic material made of an amorphous alloy, and are non-magnetic. stored in the groove of the magnetic case and held in a shape that follows the groove shape;
When housed in a non-magnetic case, the end surfaces are combined to face each other to form an annular magnetic path, and the spring provides a tensile force for bonding between the two non-magnetic cases. , when constructing a magnetic core by combining two core members made of laminated sheet-like magnetic materials made of amorphous alloy,
It is possible to provide an inductor that can be easily assembled while keeping the core members in a predetermined shape, and that can maintain the magnetic gap formed between the core members at an accurate value.

(b) Each of the two non-magnetic cases has a groove formed as a U-shaped curved path, and the two core members are a laminate of sheet-like magnetic material made of an amorphous alloy, and are non-magnetic. Since the inductor is housed in the groove of the magnetic case and held in a shape that follows the groove shape, the inductor does not suffer from deterioration of magnetic properties due to excessive bending and can fully utilize the excellent magnetic properties of amorphous alloy. Can be provided.

(c) Since each of the two non-magnetic cases has a flat part provided on the outer circumferential surface corresponding to the curved part of the groove, the magnetic properties of the core member made of amorphous alloy can be maintained without deteriorating. It is possible to provide an inductor that can be stably supported either vertically or horizontally.

[Brief explanation of the drawing]

Fig. 1 is a front view of a conventional inductor, Fig. 2 is a front partial sectional view of an inductor according to the present invention, and Fig. 3 is a front view of a conventional inductor.
The figure is a sectional view taken along line A--A in FIG. 2, and FIG. 4 is an exploded view of the inductor according to the present invention. 101, 102... Core member, 4, 5... Non-magnetic case, 41, 51... Groove, 42, 52... Flat portion.

Claims (1)

[Claims for Utility Model Registration] (1) An inductor including two non-magnetic cases, two core members housed in each of the non-magnetic cases, and a coupling spring, the inductor comprising: Each of the magnetic cases has a groove formed as a U-shaped curved path, and a flat portion provided on the outer circumferential surface corresponding to the curved path portion of the groove, and the two core members are made of amorphous amorphous material. A laminate of sheet-like magnetic materials made of an alloy, which is housed in the groove of the non-magnetic case and held in a shape that follows the groove shape, so that the end surfaces thereof face each other when housed in the non-magnetic case. are combined to form an annular magnetic path, and the spring applies a tensile force for coupling between the two non-magnetic cases. (2) Claim 1 of utility model registration characterized by having one or more coils
The inductor described in section. (3) The inductor according to claim 2, wherein the coil is directly inserted into the non-magnetic case without having a winding frame.