JP2517181Y2 - Wire wheel component, magnetic core and bobbin used for it - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a wire ring component such as a transformer and a coil,
And a magnetic core and a bobbin used therein.

[Prior Art] In this kind of wire wheel component, a bobbin around which a wire is wound is combined with a magnetic core. As a magnetic core, an E-shaped core is well known. The E-shaped core includes side legs spaced apart from each other outside the winding core of the bobbin, a central leg inserted inside the bobbin, and a connecting portion connecting these at one end side. . On the other hand, the bobbin has a base portion that is adjacent to the coupling portion of the magnetic core in the direction perpendicular to the axis, that is, in the radial direction. The pedestal holds terminals for connecting the ends of the winding. Further, a guide groove for positioning the winding near the terminal is formed on the base.

Effective passage of magnetic flux through the magnetic core requires that the side legs, the center leg, and the joints be made generally of the same cross-sectional area. However, this is an obstacle to miniaturization of the wire wheel parts.

Further, a magnetic core shown in FIGS. 7 and 8 has been proposed for the purpose of downsizing the wire wheel component (see Japanese Utility Model Publication No. 61-20729). The magnetic core is composed of a pair of side leg portions 1 and 1 arranged to face each other with a gap in a direction parallel to the reference plane R,
A central leg portion 2 extending between the side leg portions 1 and 1 in parallel with the reference plane R, and a joint portion 3 in which the pair of side leg portions 1 and 1 and the central leg portion 2 are integrally joined to each other at one end side. And have. The central leg 2 is separated from the reference plane R, and coincides with the side leg 1 and the connecting portion 3 on a plane opposite to the reference plane R, that is, on the mounting surface.

In order to construct a coil part using the magnetic core,
The bobbin shown in Figures and 10 is used. The bobbin includes a tubular portion 4 to which a winding (not shown) is attached, and a base portion 6 provided at an axial end portion of the tubular portion 4. The base 6 is located on one side of the cylinder shaft, and the surface on the cylinder shaft side is flat. The base 6 is provided with a plurality of terminals 7 spaced from each other in the direction intersecting the cylinder axis. These terminals 7 are for connecting the ends of the winding. Further, a plurality of guide grooves 8 are formed on the surface of the base portion 6 opposite to the cylinder axis. These guide grooves 8 are located between the terminals 7.

According to this bobbin and the above-described magnetic core, the total size of the coupling portion 3 and the base portion 6 is small even though the coupling portion 3 of the magnetic core is radially adjacent to the base portion 6 of the bobbin. Therefore, miniaturization of the wire wheel component is possible to some extent.

[Problems to be Solved by the Invention] However, in the magnetic core shown in FIG. 7 and FIG.
There is a problem in increasing the cross-sectional area of the side leg 1 and the central leg 2 to the same extent as the cross-sectional area of the connecting portion 3. For example, to increase the cross-sectional area of the side leg 1 and the central leg 2, the height dimension h
It is necessary to increase the thickness t. The increase of the height dimension h and the thickness dimension t causes the size increase of the wire wheel component.

Further, the bobbin shown in FIGS. 9 and 10 has a problem that the strength of the base 6 is weakened by the guide groove 8 and is easily damaged when the winding is mounted or the magnetic core is assembled. If the pedestal 6 is made thick in order to prevent damage, the wire wheel component becomes large.

In addition, with the recent miniaturization of electronic devices and the development of higher frequencies in power supplies, noise and the like have become an important issue.

Therefore, the technical problem of the present invention is that the generation of noise is small, the size is small, and it is durable, and the magnetic core does not come into contact with the board when it is mounted on the board. To provide a magnetic core and bobbin for use.

[Means for Solving the Problems] According to the present invention, a pair of side leg portions are arranged to face each other along the reference plane with a space therebetween, and extend along the reference plane, and the pair of side leg portions are provided at one end. The connecting plate portion integrally connected to each other on the side and a portion adjacent to the end surface of the connecting plate portion on the side opposite to the reference surface, and between the pair of side leg portions, the first predetermined position with respect to the reference surface. In a magnetic core having a dimension and a central leg portion projecting an elongated quadrangular shape in a cross section in a direction opposite to the pair of side leg portions, the pair of side leg portions has a first dimension smaller than the first predetermined dimension. 2, a side leg extension extending from the central magnetic leg to the side opposite to the reference plane with respect to the central magnetic leg, and a business trip portion protruding toward each other at a position adjacent to the reference plane are provided. From the portion corresponding to each of the side leg portion and the central leg portion to the central magnetic portion. A connecting plate extension that extends to match the side leg extension is provided on the opposite side of the leg from the reference plane, and the extending end of the connecting plate extension is the same as the extending end of the side leg extension. A magnetic core is obtained which is characterized in that it extends obliquely with respect to the central leg.

Further, according to the present invention, a pair of side legs arranged to face each other at intervals along the reference plane and a pair of side legs extending along the reference plane are integrally coupled to each other at one end side. The connecting plate portion and a portion of the connecting plate portion adjacent to the end surface on the opposite side of the reference surface from the side leg portion of the pair to the reference surface with a first predetermined dimension, In a magnetic core having a pair of side leg portions and a central leg portion protruding in an elongated direction in a direction opposite to each other, surfaces of the pair of side leg portions facing each other through the center leg portion are formed in parallel, The leg is provided with a business trip portion protruding toward each other at a position adjacent to the reference surface, while the coupling plate portion has an end surface opposite to the reference surface with a size smaller than the first predetermined dimension. A second trapezoidal notch having a predetermined depth, and the central leg is formed into the trapezoidal shape. Provided at a position adjacent to the upper side, the trapezoidal hypotenuse magnetic core, characterized in that extending between the side legs and the central leg portion is obtained.

Also, according to the present invention, a tubular portion around which the winding is wound,
In order to connect the pair of pedestals provided on one side of the tubular shaft of the tubular portion at both axial ends of the tubular portion and the ends of the winding,
The pair of pedestals includes a plurality of terminals arranged at intervals in a direction intersecting with the cylinder axis, and the plurality of terminals are provided on a surface of the pedestal opposite to the cylinder axis. In a bobbin for a wire wheel component in which a guide groove for guiding the winding is formed between, the base portion is formed with rounded corners on both sides of the cylinder shaft on both sides of the cylinder shaft. And has a trapezoidal-shaped ridge portion that bulges toward the cylinder axis side and side leg mounting surfaces that extend to both outer sides from the ridge portion, and the terminal corresponds to the ridge portion and extends along the cylinder axis. A bobbin for a wire wheel component is obtained which is formed so as to project outward from both ends.

Further, according to the present invention, the bobbin for the wire wheel component,
The coil includes a winding attached to the outside of the tubular portion of the bobbin for the wheel component, and the magnetic core, wherein the magnetic core has the central magnetic leg inside the tubular portion with respect to the bobbin for the wheel component. And the notch is fitted in the raised portion, and the winding is led out through the guide groove and connected to the terminal. Is obtained.

[Operation] In the magnetic core of the present invention, since the side leg portion has its cross-sectional area increased by the side leg extension portion and the business trip portion, the required cross-sectional area can be obtained with a small thickness dimension. Furthermore, since the cross-sectional area of the joining plate portion is also increased by the joining plate extension portion, the required cross-sectional area can be obtained with a small thickness dimension.

In the wire bobbin of the present invention, since the pedestal portion is thickened by the raised portion, the guide groove between the terminals can be formed sufficiently deep to surely fulfill the guide function of the wire.

In the wire wheel component of the present invention, since the raised portion of the bobbin base is fitted between the connecting plate extensions, the height of the wire wheel component itself can be prevented from increasing and the flatness can be achieved. Further, since the side leg extension portion, the business trip portion, and the coupling plate extension portion are provided, the thickness dimension of the side leg portion and the coupling plate portion can be reduced without reducing the cross-sectional area of the magnetic core. Moreover, since the winding of the bobbin is also covered by the traveling part of the magnetic core, the area covered by the magnetic core is increased.

[Embodiment] FIGS. 1 and 2 show a wire wheel component according to an embodiment of the present invention. This coil component includes a bobbin 11, a winding wire 13 attached to the outer side of the tubular portion 12 of the bobbin 11, two magnetic cores 14 combined with the bobbin 11, and the magnetic cores 14 bonded to each other. And a holder 16 for holding the state.

Referring also to FIG. 3, the bobbin 11 has a base portion 17 formed integrally with both ends of the tubular portion 12 in the axial direction. These pedestals 17 are located on one side of the cylinder axis of the cylindrical portion 12, that is, on the mounting surface side. The platform portion 17 has a raised portion 18 having a trapezoidal cross section that is raised from a side leg mounting surface 38 for mounting the side leg portion 26 of the magnetic core 14 on the cylinder axis side of the cylindrical portion 12. A plurality of conductive terminals 19 are planted on the pedestal 17 at positions corresponding to the raised portions 18. These terminals 19 are arranged at intervals in the direction crossing the cylinder axis. Terminals on the surface of the base 17 opposite to the cylinder axis
A guide groove 21 is formed between 19. Guide groove 21 is a ridge
Since it corresponds to 18, the base portion 17 can be formed in a sufficiently deep shape without fear of weakening its strength.

The end of the winding wire 13 is led out from the cylindrical portion 12, positioned through the guide groove 21, and then connected to the terminal 19.

Referring to FIG. 4 to FIG. 6, the angular magnetic core 14 includes a pair of side leg portions 26 arranged along the reference plane R so as to face each other and a pair of side legs extending along the reference plane R. A coupling plate portion 27 in which the portions 26 are integrally coupled to each other at one end side, and a first predetermined dimension 28 relative to the reference plane R between the coupling plate portion 27 and the pair of side leg portions
And a central leg portion 29 protruding at a distance.

On the side leg portion 26, a business trip portion 31 protruding in a direction close to each other at a position adjacent to the reference plane R, and a side opposite to the reference plane R,
That is, the side leg extension 33 extended by the second predetermined dimension 32 is provided on the mounting surface side. As a result, the cross-sectional area of the side leg portion 26 can be increased without increasing the thickness dimension. Here, the second predetermined dimension 32 is smaller than the first predetermined dimension 28.

The coupling plate portion 27 is provided with a coupling plate extension portion 34 extending from the corresponding portion between the pair of side leg portions 26 and the central leg portion 29 to the mounting surface side with respect to the central leg portion 29. The extending end of the connecting plate extension 34 is an inclined surface 36 extending between the side leg extension 33 and the central leg 29. As a result, it is possible to increase the cross-sectional area of the connecting plate portion 27 without increasing the thickness dimension.

The above-described magnetic core 14 also has a trapezoidal notch 37 in which a trapezoidal notch 37 having a shape and size corresponding to the cross-sectional shape of the raised portion 18 is formed on the end face on the mounting surface side of the coupling plate 27, and the notch 37 is defined. It can be said that the structure is such that the central leg portion 29 is provided at a position adjacent to the upper side.

When the above-mentioned magnetic core 14 is assembled to the bobbin 11, the central leg portion 29 is fitted in the tubular portion 12 and the notch 37 is fitted in the raised portion 18. As a result, it is possible to reduce the overall height of the wire wheel component and achieve flatness. Therefore, as described above, the side leg portion 26 and the central leg portion 29 of the magnetic core 14 can be thinned, so that a small-sized wire wheel component can be provided.

Further, in the obtained wire wheel component, since the business trip part 31 of the magnetic core covers a part of the winding wire 13, the generation of noise is reduced.

[Effects of the Invention] As described above, the noise generation is small, the size is small and durable, and the magnetic core does not come into contact with the board when mounted on the board, which is advantageous in terms of insulation. The magnetic core and bobbin used for it are obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a wire wheel component according to an embodiment of the present invention, and FIG. 2 is a state in which a winding and a holder are omitted in FIG.
II sectional view, FIG. 3 is a side view of the bobbin used for the wire wheel component of FIG. 1, FIG. 4 is a perspective view of the magnetic core used for the wire wheel component of FIG. 1, and FIG. 5 is FIG. Magnetic core front view, No. 6
FIG. 7 is a bottom view of two magnetic cores of FIG. 4 butted against each other, FIG. 7 is a perspective view of a conventional magnetic core, and FIG.
FIG. 9 is a front view of the magnetic core shown in FIG. 9, FIG. 9 is a side view of a conventional bobbin, and FIG. 10 is a view taken along line XX of FIG. 9 showing a state in which the magnetic core shown in FIG. 7 is combined with the bobbin shown in FIG. FIG. 11 ... Bobbin, 12 ... Cylindrical part, 13 ... Winding, 14 ... Magnetic core, 16
... Holder, 17 ... Stand, 18 ... Protrusion, 19 ... Terminal, 21 ... Guide groove, 26 ... Side leg, 27 ... Coupling plate, 28 ... First predetermined dimension, 29 ... Central leg, 31 ... Business trip section, 32 ... Second predetermined size,
33 ... Side leg extension, 34 ... Central leg extension, 37 ... Notch, 38 ...
Side leg mounting surface.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Ikuo Chiba, 21-1 Taishido, Sendai City, Miyagi Prefecture Tohoku Metal Industry Co., Ltd. (72) Naoki Murakami 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Incorporated (72) Inventor Kazuhiko Sakakibara 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Within Nippon Telegraph and Telephone Corporation (56) Reference JP-A-61-39511 (JP, A) JP, U) Actually opened 57-168205 (JP, U) Actually opened 60-137414 (JP, U)

Claims (4)

(57) [Scope of utility model registration request] 1. A pair of side legs arranged to face each other along a reference plane with a space therebetween, and a connecting plate extending along the reference plane and integrally joining the pair of side legs at one end side. Section and a side adjacent to the end surface on the opposite side of the reference plane of the connecting plate section and between the side leg portions of the pair, a first predetermined dimension is set with respect to the reference plane and the cross section is on the side of the pair. A magnetic core having a central leg portion protruding in an elongated rectangular shape in the opposing direction of the leg portion, wherein the side leg portions of the pair have a second predetermined dimension smaller than the first predetermined dimension from the central magnetic leg. Is also provided with a side leg extension extending on the side opposite to the reference plane, and a business trip portion protruding in a direction close to each other at a position adjacent to the reference plane. From the portion corresponding to each of the central leg portion to the side opposite to the reference plane from the central magnetic leg A connecting plate extension extending to the side leg extension is provided, and the extending end of the connecting plate extension is inclined between the extending end of the side leg extension and the central leg. A magnetic core that is characterized by 2. A pair of side legs arranged to face each other along a reference plane with a gap therebetween, and a connecting plate extending along the reference plane and integrally joining the pair of side legs at one end side. Section and a side adjacent to the end surface on the opposite side of the reference plane of the connecting plate section and between the side leg portions of the pair, a first predetermined dimension is set with respect to the reference plane and the cross section is on the side of the pair. In a magnetic core having a central leg protruding in a slender quadrangle in the facing direction of the leg, the surfaces of the pair of side legs facing each other through the central leg are formed in parallel, and Is provided with a business trip portion protruding toward each other at a position adjacent to the reference surface, while the coupling plate portion has a second end smaller than the first predetermined dimension on the end face opposite to the reference face. Form a trapezoidal notch with a predetermined depth in the center leg part next to the top side of the trapezoid. A magnetic core, wherein the hypotenuse of the trapezoid is provided at a contact position and extends between the side leg and the central leg. 3. A tubular portion around which a winding is wound, a pair of base portions provided at one end of the tubular portion in the axial direction of the tubular portion, and an end portion of the winding. For connecting, the pair of bases includes a plurality of terminals respectively arranged at intervals in a direction intersecting the cylinder axis, and on the surface of the base opposite to the cylinder axis. Is a bobbin for a wheel component in which a guide groove for guiding the winding is formed between the plurality of terminals, wherein the base portion is formed on both sides of the cylinder shaft at both side angles around the cylinder shaft. The portion has a rounded shape, and has a raised portion having a trapezoidal cross section that is raised toward the cylinder axis side, and side leg mounting surfaces that extend to both outer sides from the raised portion, and the terminal corresponds to the raised portion, and A bobbin for a wire wheel component, wherein the bobbin is formed so as to project outward from both ends along a cylinder axis. 4. A bobbin for a wire wheel component according to claim 3, a winding wire attached to the outside of the cylindrical portion of the bobbin for the wire wheel component, and a magnetic core according to claim 2, wherein: The magnetic core is combined with the bobbin for the wheel component such that the central magnetic leg is fitted in the tubular portion and the notch is fitted in the raised portion, and the winding is the guide. A wire wheel component which is led out through a groove and is connected to the above terminal.