JP6015019B2 - Winding parts - Google Patents

Description

  The present invention relates to a winding component that is surface-mounted on a substrate and used as a power choke coil, a power inductor, or the like.

  As a kind of conventional winding parts, a power choke coil having a structure in which a coil is wound around the outer periphery of a rod-shaped core made of nickel-based ferrite having a high surface electric resistance is often used. When such a power choke coil is surface-mounted on a substrate, the terminals of both ends are generally positioned with respect to the substrate by fixing the coil winding to the outer periphery of the core with an adhesive or the like. The structure to be adopted is adopted.

  In addition, when a manganese-based ferrite core having a low surface electrical resistance is used as the core, normally, the coil and the core are electrically separated and insulated using an insulating resin molded member, A structure is adopted in which a metal terminal for board mounting is implanted in the resin molded member, and an end of a coil winding is wound around the metal terminal and soldered.

  As a structure in which this type of power choke coil is surface-mounted on a substrate, for example, a structure disclosed in Patent Document 1 below is known.

JP 2000-331841 A

  By the way, in the said conventional winding components, in order to position the terminal of the said coil for board | substrate mounting, the coil is bonded and fixed to a core, or the metal for board mounting previously planted in the resin molding member There is a problem that it is necessary to tie it to the terminal, and it takes skill and a lot of trouble to manufacture.

  The present invention has been made in view of the above circumstances, and it is possible to fix the end of the coil at a predetermined position corresponding to the connection position of the board without the need for bonding or the like, thereby facilitating board mounting. It is an object of the present invention to provide a winding component that can be made.

In order to solve the above-mentioned problems, the invention according to claim 1 is characterized in that a prismatic winding part is formed in the center part, and the direction orthogonal to the axial direction of the winding part is provided at both ends of the winding part, respectively. In the winding component in which the coil is wound around the winding portion of the flat plate-like core formed integrally with the terminal positioning portion protruding to the surface and mounted on the substrate on the back side of the core, to the terminal positioning portion of each, a plurality of through-holes greater than the number of ends of the coil are formed at intervals in a direction perpendicular to the axial direction of the winding part Rutotomoni, conductive to the through-hole eyelet is provided with, the eyelet member, and the through-inserted cylindrical portion in the bore, the cylindrical portion one end is integrated with the opening edge of one of the front and back surfaces of the core of A first flange along the surface and an opening edge of the through hole on the other surface It is disposed and a second flange portion of the annular plate to be caulked to the cylindrical portion, and is characterized in that the end portion of the coil is connected to said eyelet.

According to the second aspect of the present invention , a prismatic winding portion is formed at the center portion, and terminal positioning that protrudes in both directions of the winding portion in a direction perpendicular to the axial direction of the winding portion is provided. In the winding component in which the coil is wound around the winding portion of the flat plate-shaped core formed integrally with the surface and mounted on the substrate on the back surface side of the core, the terminal positioning of each of the cores in part, Rutotomoni end a plurality of through-holes greater than the number of the coils are formed at intervals in a direction perpendicular to the axial direction of the winding part, is eyelet having conductivity in the through-hole provided it with, the eyelet member, first along one side of the said through-inserted cylindrical portion into the hole, is integrated in the opening edge portion of one end of the cylindrical portion front and back surfaces of the core and the flange portion, is disposed on an opening edge portion of the through hole on the other side the circle And a second flange portion of the crimp are annular plate in section, the end portion of the inserted the coil to the cylindrical portion from the surface side of the core, is drawn from the rear surface side to the substrate It is characterized by being a mounting terminal.

  According to the first aspect of the present invention, the through hole of the core is previously formed at a position that matches the land position of the substrate, so that the core member is disposed on the back surface of the core member provided with the through hole. The 1st or 2nd collar part can be made into the terminal in a mounting position as it is.

  Further, in the invention according to claim 2, by forming the core through-hole in a position that matches the terminal through-hole of the substrate in advance, the core is inserted into the cylindrical portion from the front surface side and from the back surface side. The end of the drawn coil can be used as a mounting terminal by inserting the through hole. As a result, it is possible to fix the end of the coil at a predetermined position corresponding to the connection position of the substrate without requiring labor such as adhesion, thereby facilitating manufacture and mounting on the substrate.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows one Embodiment of the winding components which concern on this invention, (a) is a top view, (b) is a front view, (c) is a side view. It is a front view which shows the state which surface-mounted the coil | winding component of FIG. FIGS. 2A and 2B show a shape of a core in the winding component of FIG. 1, in which FIG. 1A is a plan view and FIG. 1B is a cross-sectional view taken along line bb in FIG. The shape of the eyelet member in the coil | winding components of FIG. 1 is shown, (a) is a top view, (b) is a front view, (c) is a cc line sectional view of (a). It is a figure shown with the board | substrate which mounted the various modifications of the eyelet member used for the coil | winding component of FIG. 1, (a) is a top view, (b) is a front view, (c) is a bottom view, (d) is a side view FIG. 6A and 6B are diagrams showing a first modification of the eyelet member shown in FIG. 5, where FIG. 5A is a plan view, FIG. 5B is a front view, FIG. 5C is a side view, and FIG. It is a line sectional view. It is a figure which shows the 2nd modification of the eyelet member shown in FIG. 5, (a) is a top view, (b) is a front view, (c) is a side view. It is a figure which shows the 3rd modification of the eyelet member shown in FIG. 5, (a) is a top view, (b) is a front view, (c) is the cc line sectional view of (a).

1 to 4 show an embodiment of a winding component according to the present invention.
As shown in FIG. 2, this winding component is used by being surface-mounted on a substrate 5. Reference numeral 1 in the figure denotes a nickel-based nickel plate formed in a flat plate shape having a thickness of several millimeters. Ferrite core.

  As shown in FIG. 3, the core 1 has a prismatic winding portion 2 formed at the center, and both ends of the winding portion 2 are orthogonal to the axial direction of the winding portion 2. The terminal positioning portion 3 that protrudes into the shape is formed integrally, thereby forming a substantially I-shape. In the following description, the surface of the core 1 exposed on the substrate 5 is referred to as the front surface 1a, and the surface facing the substrate 5 is referred to as the back surface 1b.

  In each terminal positioning portion 3, a plurality of (three in the drawing) through holes 4 are formed at equal intervals in a direction orthogonal to the axial direction of the winding portion 2. Here, one of the three through holes 4 at each end is formed at a position that matches the terminal through hole of the substrate 5 shown in FIG. Further, eyelet fittings (eyelet members) 6 are attached to all the through holes 4.

  As shown in FIG. 4, the eyelet fitting 6 includes a main body portion 7 in which a first flange portion 7 b is integrally formed on an opening edge portion on one end side of a cylindrical portion 7 a that is densely inserted into the through hole 4, and It is a general-purpose part provided with the 2nd collar part 8 of the annular plate shape crimped by the other end part side of the cylindrical part 7a. The eyelet fitting 6 has a cylindrical portion 7a inserted into the through hole 4 and a first flange 7b disposed on the surface 1a of the core 1 with the first flange 7b in contact with the back surface 1b of the core 1. The two flange portions 8 are fixed in the through hole 4 of the core 1 by being crimped to the cylindrical portion 7a.

  As shown in FIG. 1, one end portion 9 a of the coil 9 wound around the winding portion 2 of the core 1 is a cylindrical portion of the eyelet fitting 6 of the terminal positioning portion 3 on one end side of the winding portion 2. 7 a is inserted from the front surface 1 a side of the core 1 and pulled out to the back surface 1 b side of the core 1. Further, the other end portion 9 b of the coil 9 is inserted into the cylindrical portion 7 a of the eyelet fitting 6 of the terminal positioning portion 3 on the other end side of the winding portion 2 from the surface 1 a side of the core 1 in the same manner. It is pulled out to the back surface 1b side.

  Further, as shown in FIG. 2, the end portions 9a and 9b of the coils 9 are respectively inserted into through holes for terminals of the substrate 5 and soldered to the substrate 5 as mounting terminals. It has come to be attached. In addition, this winding component includes the first flange 7b disposed on the back surface 1b side of the core 1 of all the eyelet fittings 6 including the eyelet fittings 6 in which the ends 9a and 9b of the coil 9 are not inserted. Is fixed to the substrate 5 by soldering or the like.

  Thus, according to the winding component having the above-described configuration, the surface of the core 1 is formed by previously forming the through hole 4 of the core 1 at a position that matches the terminal through hole of the substrate 5 to be surface-mounted. The end portions 9a and 9b of the coil 9 inserted into the cylindrical portion 7a from the 1a side and pulled out from the back surface 1b side can be used as mounting terminals by inserting the through holes. As a result, the end portions 9a and 9b of the coil 9 can be fixed at a predetermined position corresponding to the connection position of the substrate 5 without requiring time and labor for bonding and fixing the coil to the core. Easy to implement.

  Further, by fixing the first flange 7b of all the eyelet fittings 6 and the substrate 5 by soldering or the like, the stability can be greatly improved.

  In the above embodiment, the through hole 4 through which the end portions 9a and 9b of the coil 9 are inserted in advance is formed at a position that matches the terminal through hole of the substrate 5, and is inserted from the surface 1a side of the core 1. Although only the case where the end portions 9a and 9b of the coil 9 drawn out to the back surface 1b side of the core 1 are respectively inserted into the terminal through holes of the substrate 5 and soldered has been described, the present invention is limited to this. It is not a thing.

  That is, the through-hole 4 of the core 1 is previously formed at a position that matches the land position of the substrate 5, and the end portions 9 a and 9 b of the coil 9 are connected to the second flange portion 8 or the cylindrical portion 7 a of the eyelet fitting 6. While connecting by soldering or the like, the first flange 7b of the eyelet fitting 6 can be connected to the land of the substrate 5 as a mounting terminal as it is.

  At this time, the solder for connecting the end portions 9a and 9b of the coil 9 to the second flange portion 8 without integrating the cylindrical portion 7a and the second flange portion 8 of the eyelet fitting 6 by caulking. Thus, the two may be electrically connected.

  FIGS. 6 to 8 show first to third modifications of the eyelet member that are suitable when the eyelet member is used as a connection terminal to the substrate 5 as described above. FIG. The state which attached the eyelet members 10, 20, and 30 shown in the 1st-3rd modification to the core 1 is illustrated. In addition, since the structure of the core 1 in the figure is the same as that shown in FIG.

  In the eyelet member 10 of the first modification shown in FIG. 6, a first flange 12 is integrally formed at one end of the cylindrical portion 11 inserted into the through hole 4, and the first flange A vertical wall portion 13 bent at a right angle to the tip portion of the portion 12 and a second flange portion 14 formed by bending the tip portion of the vertical wall portion 13 at a right angle are integrally formed.

  Here, the first flange portion 12 is formed in a rectangular plate shape having a length dimension extending from the through hole 4 to the end side wall 1 c of the core 1, whereby the vertical wall portion 13 is formed on the core 1. It arrange | positions along the said side wall 1c. Further, the second flange portion 14 is bent so that the front end portion of the vertical wall portion 13 is along the surface 1 a of the core 1, and the opening portion 15 for caulking is formed by inserting the cylindrical portion 11. ing.

  Then, the eyelet member 10 having the above-described configuration has a cylindrical shape from the end in a state where the second flange 14 is bent and the end of the cylindrical portion 11 is opened as shown by an imaginary line in FIG. The portion 11 is inserted into the through hole 4, and then the second flange portion 14 is returned to the position shown in FIG. 6 (d) to engage the cylindrical portion 11 in the opening 15 and contact the surface 1 a of the core 1. After being brought into contact with each other, by being integrated with the cylindrical portion 11 by caulking or the like, as shown in FIG.

  According to the eyelet member 10 having the above-described configuration, the first flange portion 12 is formed so as to extend to the side wall 1c of the core 1, and the vertical portion along the side wall 1c of the core 1 is bent by bending the tip portion thereof. Since the wall portion 13 is integrally formed, a large solder area can be secured when the first flange portion 12 is used for soldering to the substrate 5, and a solder fillet together with the vertical wall portion 13 can be secured. The growing part can be constructed. For this reason, the winding component can be firmly fixed to the substrate 5, and thus the stability at the time of mounting on the substrate can be improved and the vibration resistance and the like can be improved.

  In addition, the eyelet member 20 of the second modified example shown in FIG. 7 is a rectangular plate that protrudes out of the vertical wall portion 13 on both side edges of the vertical wall portion 13 of the eyelet member 10 shown in FIG. The heat sink 21 is integrally formed.

  Therefore, according to the eyelet member 20, in addition to the above effects, heat generated in the coil 9 when the winding component is used as a large current specification can be radiated into the air via the heat radiating plate 21. The effect is obtained.

  Further, the eyelet member 30 shown in the third modification shown in FIG. 8 has a length dimension extending outward from the side wall 1c of the core 1 at one end portion of the cylindrical portion 31a inserted into the through hole 4. A rectangular plate-shaped first flange 31b is integrally formed. And the hole 33 for screwing is formed in the part extended from the side wall 1c of the core 1 in this 1st collar part 31b. Moreover, the 2nd collar part 32 crimped by the said cylindrical part 31a similar to the eyelet metal fitting 6 shown in FIG. 4 is provided in the other end part of the cylindrical part 31a.

  The eyelet member 30 having the above-described configuration has the first flange 31b disposed between the back surface 1b of the core 1 and the substrate 5 and attached to the through hole 4, and further the first flange 31b is attached to the core 1 from the core 1. It fixes by screwing to the board | substrate 5 using the hole 33 formed in the part extended outward, and the hole 5a formed in the opposing position of the board | substrate 5. As shown in FIG.

  As a result, according to the eyelet member 30, the heat generated in the coil 9 is released from the first flange portion 31b to the substrate 5 when used as a large current specification as shown in FIG. The effect that it can be obtained.

  5 shows a state in which the eyelet members 10, 20, and 30 are attached, respectively, but in fact, the same eyelet member 10, the eyelet member 20, or the eyelet member 30 with respect to all the through holes 4. It is possible to attach or arrange these eyelet members 10, 20, 30 in combination as appropriate.

DESCRIPTION OF SYMBOLS 1 Core 1a Front surface 1b Back surface 2 Winding part 3 Terminal positioning part 4 Through-hole 5 Substrate 6 Eyelet metal fittings 7a, 11, 31a Cylindrical part 7b, 12, 31b First collar part 8, 14, 32 Second collar part 9 Coil 9a, 9b End 10, 20, 30 Eyelet member 13 Vertical wall 21 Heat sink

Claims (2)

A rectangular column-shaped winding part is formed in the central part, and terminal positioning parts that protrude in a direction perpendicular to the axial direction of the winding part are integrally formed at both ends of the winding part . In a winding component in which a coil is wound around the winding portion of the core and surface-mounted on the substrate on the back side of the core,
To the terminal positioning portion of each of the core, a plurality of through-holes greater than the number of ends of the coil are formed at intervals in a direction perpendicular to the axial direction of the winding part Rutotomoni, the through hole eyelet is provided with an electrically conductive,
The eyelet member includes a cylindrical portion inserted into the through hole, a first flange portion that is integrated with an opening edge portion on one end side of the cylindrical portion and extends along one surface of the front and back surfaces of the core, An annular plate-shaped second collar portion disposed on the opening edge of the through hole on the other surface and crimped to the cylindrical portion ;
The winding component, wherein an end of the coil is connected to the eyelet member. A rectangular column-shaped winding part is formed in the central part, and terminal positioning parts that protrude in a direction perpendicular to the axial direction of the winding part are integrally formed at both ends of the winding part . In a winding component in which a coil is wound around the winding portion of the core and surface-mounted on the substrate on the back side of the core,
To the terminal positioning portion of each of the core, a plurality of through-holes greater than the number of ends of the coil are formed at intervals in a direction perpendicular to the axial direction of the winding part Rutotomoni, the through hole eyelet is provided with an electrically conductive,
The eyelet member includes a cylindrical portion inserted into the through hole, a first flange portion that is integrated with an opening edge portion on one end side of the cylindrical portion and extends along one surface of the front and back surfaces of the core, An annular plate-shaped second collar portion disposed on the opening edge of the through hole on the other surface and crimped to the cylindrical portion ;
A winding component, wherein an end portion of the coil inserted into the cylindrical portion from the front surface side of the core is drawn out from the back surface side to be a mounting terminal on the substrate.

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