JP3299639B2 - Surface mount coil with glasses type core - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface mount coil provided with a spectacle type core used for various electronic devices.

[0002]

2. Description of the Related Art FIG. 9 shows a conventional surface mount coil having a glasses type core . In FIG. 9, reference numeral 1 denotes a glasses-type core made of a magnetic material such as ferrite. The core 1 has a horizontal hole-shaped winding portion 11 around which a winding 2 is wound, and 3 is formed of resin or the like. The base 3 is provided with a plurality of flat terminals 4 integrally fixed at the time of molding. The core 1 and the base 3 having such a configuration are fixed with an adhesive,
The terminal of the winding 2 was connected to the flat terminal 4.

[0003]

However, in the above configuration, since the base 3 having the flat terminal 4 is used, there is a problem in terms of material in terms of material, and the cost as a coil component can be reduced. It was difficult to realize. Also, in the production process, the core 1 formed by molding,
The operation becomes very complicated when the flat terminals 4 are combined with the base 3 formed by integrally molding the flat terminals 4, and the productivity is significantly impaired. In addition, in contrast to the recent trend of downsizing, in the conventional one, the core 1 and the base 3 are separate bodies, so that the reduction in size and weight is naturally limited, which is also difficult in that respect. there were.

Accordingly, the present invention is intended to solve the above-mentioned problems and to easily realize a reduction in cost and a reduction in size and weight.

[0005]

According to the present invention, there is provided a glasses type core according to the present invention.
A plurality of surface mount coils are provided, as described in claim 1.
Of the horizontal hole-shaped winding part (11, 11, 11a, 11b)
Eyes made of a magnetic material in which the coil (2) is wound in, respectively
A plurality of recesses (5) is provided at the bottom of the root type core (1),
Surface mounting in which the flat terminal (4) is fixed to the recess (5).
A coil, wherein the flat terminal (4) is provided in the concave portion
A locking portion (7) is provided on the side fixed to (5).
The locking portion (7) is locked to the side surface of the glasses-shaped core (1).
This can be achieved by positioning at the time of fixing . In this case, the glasses-type core itself also functions as a conventional base, and is flattened by the locking portion.
The position of the plate-shaped terminal will no longer be displaced.
Is the bending of the terminal when winding the coil terminal around this terminal
Can be prevented.

[0006] Then, as a structure of glasses-shaped core made of the magnetic material shown in claim 2, wherein the plurality because of
By forming a groove (13) in the glass core (1),
Several core parts (1a, 1b) are formed,
A (1a, 1b) side hole in which a winding is wound around each
It is also possible to provide a winding part (11a, 11b) . This
In other words, the eyeglass core itself as a conventional base
Function as a dual role, and multiple cores
Can be handled in the same way as those with a core of
Even if the core is configured as separate parts, it is inevitable for both
However, the characteristics may vary.
With such a configuration, the variation can be suppressed.

[0007]

Figure 1 DETAILED DESCRIPTION OF THE INVENTION, because as Barunkoiru
FIG. 2 is a perspective view of a surface mount coil provided with a glass core .
2A is a front view, FIG. 1B is a side view, and FIG. FIG. 3 is a plan view showing an example of a state where the flat terminals are connected. In FIG. 1 or FIG. 2, reference numeral 1 denotes a glasses-type core made of a magnetic material such as ferrite. The core 1 has a winding portion 11 around which a winding is wound. A plurality (six in the figure) of recesses 5 are formed in portions of the core 1 that are off the winding portion 11.
The flat terminal 4 as shown in FIG. In general, a one-component epoxy-based adhesive or the like is used as the adhesive. However, when a ceramic coating agent is used, the adhesive is excellent in heat resistance and insulation.

[0008] FIG. 4, glasses as other Barunkoiru
(A) front view of a surface mount coil provided with a mold core ,
(B) is a side view, (c) is a bottom view. In the present example, opposed concave portions 5 are formed to communicate with each other, and opposed flat terminals 4 are arranged at predetermined intervals in the communicating portion 12. The opposed flat terminals 4 are bonded together.

[0009] FIG. 5, is because as a third of Barunkoiru
(A) front view of a surface-mount coil having a core
(B) is a side view, (c) is a bottom view. In this example, the glasses
The flat terminal 4 arranged in the concave portion 5 of the mold core 1
This is not fixed by bonding as described in the second embodiment, but fixed by resin sealing.

FIG. 6 shows a fourth balun coil as eyeglasses.
(A) front view of a surface mount coil provided with a mold core ,
(B) is a side view, (c) is a bottom view. Here, at the time of bonding or resin sealing, the cover 6 is arranged on the lower surface of the core in which the concave portion 5 is formed, and is fixed to the core 1 together with the terminal 4.

FIGS. 7A and 7B are (a) a front view and (b) a side view of a surface mount coil having a glasses type core as a balun coil , showing a basic embodiment of the present invention. In the present embodiment, a state in which the winding 2 is wound around the core 1 is shown, and a locking portion 7 made of, for example, resin or the like is provided on the side of the flat terminal 4 which is fixed to the concave portion 5. The positioning is performed by locking the locking portion 7 to the core surface.
Is fixed to the recess 5. In this way, the operation can be simplified and a small-sized and low-cost surface-mounted coil can be obtained.

[0012] Figure 8 is a surface mount equipped with glasses-shaped core as Barunkoiru showing a second embodiment of the embodiment of the present invention
It is a perspective view of a coil . In the present embodiment, it is made of a magnetic material.
By forming a groove 13 in a part of the eyeglass-shaped core, two sets of a first core 1a and a second core 1b are formed, and a winding is formed on each of the first core 1a and the second core 1b. Are provided with winding portions 11a and 11b around which the wire is wound.
7 and 8, the cores are made of the same material.
However, if they are configured as separate parts, both will inevitably have characteristics
Although fluctuations may occur, the above configuration
If so, the variation can be suppressed. In this embodiment, two sets of cores are described in detail. However, for example, three sets of cores may be formed by forming the grooves 13 at two places, and the present invention is particularly limited to two sets of cores. Not something.

[0013]

As described above, according to the present invention, a plurality of concave portions are provided at the bottom of a glasses-shaped core made of a magnetic material, and a flat terminal is fixed to the concave portion, thereby eliminating the need for a conventional base component. Thus, a small and low-cost surface mount coil can be realized while simplifying the operation. A locking portion is provided on the side of the flat terminal fixed to the concave portion, and the locking portion is locked to the core surface to fix the flat terminal to the concave portion. The terminal can be prevented from being bent when the winding is wound around the terminal.

By disposing a cover on the core surface where the concave portion is formed, it is possible to prevent the adhesive or the resin from protruding out and to realize a stable mounting of the substrate. Then, at least two sets of first and second cores are formed by forming a groove in a part of a glasses-shaped core made of a magnetic material, and each of the first and second cores is formed. By providing the winding portion around which the winding is wound, a single component can be handled in the same manner as a plurality of component configurations, and a significant reduction in size can be realized. Moreover, even if the cores are made of the same material, if they are configured as separate parts, the characteristics of the core and the core will inevitably vary. However, with the above-described configuration, the variations can be suppressed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a surface mount coil provided with a glasses-type core .

2 (a) is a front view, FIG. 2 (b) is a side view, and FIG. 2 (c) is a bottom view of the surface mount coil provided with a glasses-type core in FIG.

FIG. 3 is a plan view showing an example in a state where the flat terminals are connected.

4A is a front view, FIG. 4B is a side view, and FIG. 4C is a bottom view of a surface mount coil provided with another glasses core .

5 (a) is a front view, FIG. 5 (b) is a side view, and FIG. 5 (c) is a bottom view of a surface mount coil provided with a third glasses core .

6A is a front view, FIG. 6B is a side view, and FIG. 6C is a bottom view of a surface mount coil provided with a fourth glasses core .

FIGS. 7A and 7B are a front view and a side view, respectively, of a surface mount coil having a glasses-type core according to the first embodiment as a basic specific example of the present invention.

FIG. 8 shows a second embodiment of the present invention.
FIG. 3 is a perspective view of a surface-mount coil provided with a round core .

FIG. 9 is a front view of a conventional surface-mount coil having a glasses-type core .

[Explanation of symbols]

 Reference Signs List 1 core 1a first core 1b second core 2 winding 3 base 4 flat terminal 5 concave portion 6 cover 7 locking portion 11, 11a , 11b winding part 12 communication part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-135981 (JP, A) JP-A-4-23110 (JP, U) JP-A-63-128706 (JP, U) JP-A-50- 32541 (JP, U) Actually open 1987-140717 (JP, U) Actually open 1988-89,213 (JP, U) Actually open, 63-106113 (JP, U) Actually open, 60-83216 (JP, U) (58) Field surveyed (Int.Cl. ⁷ , DB name) H01F 27/29 H01F 17/04 H01F 19/06

Claims (2)

(57) [Claims] A plurality of side-hole-shaped winding portions (11, 11, 1) ;
1a, a plurality of recesses in the lower part of the coil (glasses-shaped core 2) consists <br/> magnetic material wound (1) (5) is provided in each of 11b), in the recess (5) A surface-mounted coil to which a flat terminal (4) is fixed;
The terminal (4) has a locking portion on the side fixed to the concave portion (5).
(7) is provided, and this locking portion (7) is
A. Position at the time of fixing by locking to the side of (1)
A surface-mount coil with a spectacle-shaped core, characterized by the decision . 2. A groove in the plurality of glasses cores (1).
By forming (13), a plurality of core portions (1a,
1b) to form a plurality of core portions (1a, 1b).
The side-hole-shaped winding portions (11a, 1
1b) is provided with a glasses-type core according to claim 1.
For example it was surface-mounted coil.