JPS5870507A - Inductor - Google Patents

Abstract

PURPOSE:To provide high inductance value with small size and to apply automatic solder dipping to a printed circuit substrate by a method wherein the extension of a terminal wire is omitted with a structure wound a winding on a magnetic core member. CONSTITUTION:A winding 8 is wound on the outside circumference of a drum- type magnetic core member 7 and pants of circular electrode members 10a, 10b formed by distributing a plurality of winding end section guiding notch sections 9 at the end faces of collar sections 7a, 7b are applied an electrode material and backed. The initial winding end section 8a and the final winding end section 8b of the winding 8 are positioned at the surface sides of respective electrode members 10a, 10b through the notches 9. Meanwhile, a cylindrical magnetic core member 12 formed annular pants 11a, 11b of electrode members at the opposite end sections is provided. The drum-type magnetic core member 7 is accommodated in the magnetic core member 12 and in addition to the end sections 8a and 8b of the winding 8, electrode semi-members 11a, 11b and 10a, 10b are formed in one body to form cap-type electrodes 15a, 15b and connection is made to the winding 8. In this way, high inductance value is provided and easy mounting is permitted.

Description

[Detailed description of the invention] This invention relates to an inductor.

2. Description of the Related Art A chip-type inductor having a structure shown in FIG. 1 has been known as a chip-type inductor that can be directly soldered to a printed wiring board. This inductor is made by applying conductive paint to the surface of a thin ferrite sheet, then spinning the ferrite sheet tS and firing it.
A power collecting cap @2.2 is attached to both ends of the cap and is connected to the inner end 3a and outer end 3b of the conductive paint coating surface 30, respectively.

However, such an inductor cannot be given an inductance value of 30 μH or more due to restrictions on its structure and manufacturing process, and has limitations as a chip-type inductor.

As shown in FIG.
A T-wound structure is conventionally known. However, since this inductor has a structure in which terminal wires are wired at both ends, it can be mounted on a printed wiring board like Ike's chip components (resistors, capacitors, inductors) and used with automatic soldering equipment. It cannot be subjected to processes such as solder dipping.

Therefore, an object of the present invention is to provide an inductor that can be automatically soldered dipped onto a printed wiring board in the same way as other chip components and that can provide a large inductance.

A first dormitory embodiment of the present invention is shown in FIGS. 3 to 5.

That is, this inductor has circular flange portions 7m at both ends,
A winding 8 is wound around the outer periphery of a drum-shaped magnetic core 1tls 7 having 7bt, and the flange 7a.

As shown in FIG. 3 (2), io, a plurality of winding end guide notches 9 are formed distributed on the outer edge of the end surface of 7b.
The disk-shaped electrode half members 10m and 10b are formed by applying and baking an electrode material, and the initial feed end 8a and the winding end [8b] of the 80 windings are formed by applying an electrode material and baking the disk-shaped electrode half members 1.
The electrode half members 11a, 10b are placed on the surface side of the disk-shaped electrode half members 10m, 10b through the notches 9 of 0a, 10b, and silver paint or the like is applied to both ends and baked to form ring-shaped electrode half members 11a, llbf. A formed cylindrical magnetic core member 12 shown in FIG. 4 is provided, and this cylindrical magnetic core member 12
The drum-shaped magnetic core member 7 is housed in the inner part, and the disc-shaped electrode half members 10a and 10b on both end faces thereof are aligned with *13 of the front ring-shaped electrode half members 11a and llb, and the winding 80 turns The annular half-members 11a and 11b and the disk-shaped electrode half-members 10g and 10b are integrated together with the feeding end 8a and the end winding end 8b using solder 14 to form cap-shaped electrodes 15a and 15b, and at the same time A closed magnetic path is formed by the drum-shaped magnetic core member 7 and the cylindrical magnetic core member 12 in which the flanges 7m and 7b are inscribed, and the winding 8 is electrically connected to the cap-shaped electrodes 15a and 15b. It is something.

At the periphery of the flange portions 7a, 7bf of the lIT drum-shaped magnetic core powder 7, there are cutout portions 9 of the disk-shaped electrode half members 10i and lOb.
. . . are formed so that the beginning part 8a and the end part 8b of the winding 8 pass through the notches 16.9') to the disc-shaped electrode half member 10a. , 10b.

In this way, the structure is such that the winding 81 is wound around the magnetic core member and the extension of the terminal wire is omitted, making it possible to reduce the external size and provide a large inductance value: similar to the chip component in a. Can be easily attached to a printed wiring board,
It is now possible to solder the knob using an automatic soldering device.
The inductor mounting process can be streamlined and printed wiring board design can be simplified.

A second embodiment of the invention is shown in FIGS. 6-8.

That is, this inductor is formed by forming one cuff-de-shaped electrode @tsb' in the first embodiment on one part 7b' of the hourglass-shaped magnetic core member 7' by applying an electrode material. The carrier 71-type electrode 1115m is formed of an annular electrode half member 11a and a disc-shaped electrode half member 10m as in the previous embodiment.

The cap type electric field fI7A1 of the aspect of the flange 7b'
On the inward edge where 5b' is not formed, a step surface 17 is formed which circumscribes and fits into one end of the cylindrical magnetic core member 12, thereby connecting the drum-shaped magnetic core member 7' to the cylindrical magnetic core member 12. This allows for easy mating. --In this embodiment, the winding end (in this case, the winding start end 8a) is placed on the surface side of the integrally formed cap-shaped electrode 15b'. and a notch 9' formed at the periphery of the cat-shaped electrode 15b' which is aligned with the notch 16.

The first end 8 of the winding drawn out to the surface of the cap-shaped electrode 15b' is covered with solder 141C like the other end 8b of the winding.
Therefore, it is connected and fixed to the end face.

In this way, one cap-shaped electrode @115t/ is integrally formed, and only the ring-shaped electrode half member 11m and the disk-shaped electrode half member 10 are formed for the other character 1-type electrode 11i15a.
Since it is made of 2g6 material (a), the structure is simple, and the machining and assembly of the material is easy.

Other effects are similar to those of the first embodiment.

A third embodiment of the invention is shown in FIGS. 9 to 11. That is, this inductor has a ring-shaped electrode half member 118' and a disk-shaped electrode half member 10 in the second embodiment.
Cap type electric 11115m' consisting of two members g'
One of the flanges of the drum-shaped magnetic core member facing the drum-shaped magnetic core member is separated from the drum-shaped magnetic core member and integrally formed with one end of the cylindrical magnetic core member 12' as an annular collar 71, and one end is connected to the annular collar 71. The same forming end 7 has an outer diameter that can fit into the hole 18 of the full length.
A disk-shaped electrode half member 101' is bonded and fixed to the end surface of the main part τ of the drum-shaped magnetic core member 7 on the same forming end 7/ side. At the same time, the same forming end 7/ is fitted into the hole 18 of the annular flange 71, and the annular electrode half member 11m' and the disc-shaped electrode half member 10m' are integrated with solder 14. The annular flange portion 7 (and the main portion τ of the hourglass-shaped magnetic core member are integrated with each other).

In this case, the winding end is on the surface of the cap-shaped electrode 15a'.
As shown in FIG. 9(2), notches formed in a radial manner on the inner periphery of the annular electrode half member 11a' and notches formed on the inner periphery of the annular flange 7/ that align with the notches It is configured with a section IC.

Regarding the pond end portion of the main portion of the hourglass-shaped magnetic core member and the other cap-shaped electrode 15b', the above l! This is similar to the second embodiment.

With this configuration, the insertion of the main portion τ of the hourglass-shaped magnetic core member into the annular magnetic core member 12' is prevented by the same forming end 7/IIIJ.
By doing so, the assembly can be made even easier.

Other effects are similar to those of the first embodiment.

As described above, the inductor of the present invention has a flange at both ends.
a drum-shaped magnetic core member, a winding wound around the drum-shaped magnetic core member, a first winding end guide path formed on the edge of the flange portion, and a winding wire wound around the drum-shaped magnetic core member; A cylindrical magnetic core member inserted into the drum-shaped magnetic core member t to form a closed magnetic path so as to be in contact with each other, a cap-shaped electrode formed at both ends of the closed magnetic path, and the third electrode formed on the periphery of the cap-shaped electrode. The winding end is formed at a position aligned with the winding end guide path of
Since the inductor is equipped with a winding end guide path of $2 and a winding end guide path of $2 that is guided on the surface side of the cap-shaped electrode, it is possible to create an inductor that is small and has a large inductance value. It can be easily attached to a printed wiring board in the same way as Ike's chip components, and the solder dipping process using automatic soldering equipment can be applied without any inconvenience, making it possible to streamline the inductor mounting process and simplify the design of printed wiring boards. can.

[Brief explanation of drawings]

Figure 1g1 is a partially cutaway front view of a conventional example. Figure 2 is a partially cutaway front view of a conventional pond;
Figures 1 and 2 are left side views of the hourglass-shaped magnetic core member according to the first embodiment of the present invention. Longitudinal cross-sectional view, right side view, 1g4 diagrams (2), (2), C1 are the left-first view, vertical cross-sectional view, and right-first view of the cylindrical magnetic core member, respectively, and Figure 5 is the same view. A partially broken new front view showing the assembled state U, FIGS. 6(2) and (5) are a left side view and a vertical sectional view of a cylindrical magnetic core member according to a second embodiment of the present invention, and FIG. 7( 2)
, (2) are respectively a longitudinal sectional view and a right side view of the hourglass-shaped magnetic core member, FIG. 8 is a longitudinal sectional view showing its assembled state, and FIG.
Figures (2) and 81 are a left side view and a vertical sectional view of a cylindrical magnetic core member according to the third embodiment of the present invention, respectively, and Figure 10 (2) and (■) are a vertical sectional view of an hourglass-shaped magnetic core member, respectively. and a right side view, and FIG. 11 is a longitudinal sectional view showing the assembled state at. 7, 7'... drum-shaped magnetic core members, 7a, 7m'
*7b, 7b'. 7b'... Flange portion, 71... Annular flange portion, 8... Winding wire, 8a... Winding start end, 8b... Winding end end, 9.
9', 9''...notch (second winding end guide path), 10
m, 10B', 10b, 10b'... Disk-shaped electrode half member, 11a, 11B'... Annular battery half member, 12, 12'... Cylindrical magnetic core member, 14... Solder, 15a . 15m', 15b, 15t/...cap type electrode, 1
6, 16', 16'... Notch (first winding end guide link) (A) (B) (C) Fig. 3 (A) (B) (C) 5b Fig. 5 (A) (B) Figure 6

Claims (1)

[Claims] (1) A drum-shaped magnetic core member having a flange at all ends, a winding wound around the drum-shaped core member, and the flange 111[11
and a cylindrical magnetic core member in which the drum-shaped core member is inserted so that the collar portion is in contact with both parts 1IWi of the core member to form a closed magnetic path. , a cap-shaped electrode formed at both ends of the closed magnetic path, and a winding end formed at a position aligned with the tenth winding end guide path on the dark side of the canopy-shaped electrode. A second part of the winding is guided on the surface side of the cap-shaped electrode through a guide path.
An inductor with 0 winding ends and a guide path. (1) The second winding end guide path is a notch formed in the edge of the cap-shaped electrode.
). 1) The closed magnetic path may include a cylindrical magnetic core member having an annular portion integrally formed at one end thereof, which becomes a part of one of the drum-shaped magnetic core members, and one end portion of which can be fitted into the annular portion of the cylindrical magnetic core member. The main part of the drum-shaped magnetic core member has a non-flange-formed end forming an outer diameter, and the first winding end guide path is formed at the cabinet edge of the annular part of the cylindrical magnetic core member. The inductor according to claim 11, wherein the inductor is a cutout portion.