JP2705516B2 - Coil parts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil component used for signal processing, detection, amplification and the like of communication equipment and video equipment.

[0002]

2. Description of the Related Art Conventionally, as this kind of coil component, FIG.
As shown in FIG. 1, a coaxial bobbin 11 having a plurality of winding grooves 12 and a plurality of flanges 13 forming the winding grooves 12 and having metal terminals 14 implanted on the flanges 13 is widely used.

The coaxial bobbin 11 has coils L ₁ , L ₂ ,.
The L ₃ are formed, has a structure for outputting to the outside by connecting the conductor to the metal terminal 14.

[0004]

Since the coil component having such a structure can be easily wound and connected, a coil component having various electric characteristics can be formed by selecting a winding specification and a connection terminal. , And excellent in mass productivity. Further, when the conductor is moved to the adjacent winding groove, the winding can be performed in units of 1/4 turn, and there is an advantage that the fine adjustment of the inductance can be easily performed.

[0005] However, unnecessary magnetic coupling is formed between adjacent coils. Further, as shown in FIG. 10, when it is desired to reverse the polarity of the magnetic coupling M ₁ and M ₂ between the adjacent coils and the polarity of the magnetic coupling M ₁₃ between the remaining coils, a complicated winding is required. It can be realized by making specifications,
There are drawbacks such as a shortage of relay terminals or an adverse effect such as an increase in the resistance component and stray capacitance of the coil.

[0006] As a means for solving the above-mentioned problem, a structure in which a flange is inclined has already been disclosed as disclosed in Japanese Utility Model Publication No. 54-41643. FIG. 11 shows an example of this.

However, in the above structure, when winding is performed by a general winding machine, the conductor is easily hooked on the inclined flange 13 and winding is difficult. In order to solve this problem, winding is performed while guiding the conductor by inclining the conductor, or the coaxial bobbin 1
Equipment for winding the conductor while vibrating in the direction of the winding in synchronization with the rotation of the coil is considered, but the equipment is complicated in each case, and equipment dedicated to coil components having this structure is required.

Further, since the inclination direction is the same, the effect of reducing the magnetic coupling between the coils is thin, and in order to enhance the effect, the problem on the winding becomes greater as the inclination angle is increased. In addition, there is also a problem that the coil is easily spread in the width direction in the winding groove 12, and the variation in inductance is increased.

As another solution, Japanese Utility Model Laid-Open No. 59-1
There is a technique disclosed in Japanese Patent No. 77219.

That is, as shown in FIG. 12, winding grooves 16 are alternately formed at regular intervals from two opposing surfaces of a rectangular parallelepiped bobbin 15, and a conductor is wound over the winding grooves 16 to form a coil component. It is what it was.

However, the bobbin 1 having the structure shown here is used.
5, the various coil specifications that are possible with the coil component of FIG. 9 are not possible. Also, as shown in FIG. 12, the conductors overlap at the center between the two winding grooves 16. Therefore, as the number of windings increases and the overlap increases, the outer dimensions of the coil must be increased, the number of windings must be reduced, or
Since the conductor diameter must be reduced,
The structure is difficult to obtain high performance.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems. Unnecessary magnetic coupling between adjacent coils is hardly formed, necessary magnetic coupling is easily obtained, and various winding specifications are provided. The present invention is to provide a coil component having a structure excellent in mass productivity that can use general winding equipment as it is and can select multiple windings.

[0013]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a plurality of winding grooves orthogonal to the center axis of a coaxial bobbin.
And a plurality of flanges forming a winding groove, and the coaxial bobbin is provided with a flange.
One or more turns of the conductor across the winding grooves on both sides
This is a configuration in which a coil of a wound inclined loop is provided .

[0014]

According to the above construction, since the magnetic flux of each wound coil is generated on a different axis, the number of magnetic fluxes interlinking between adjacent coils can be reduced.
Further, the inclination angle and the winding diameter of the coil of the inclined loop can be arbitrarily selected, and fine control can be performed by magnetic coupling. Furthermore, since the collar is perpendicular to the winding axis, it is possible to form both the coil of the inclined loop and the coil of the non-inclined loop by the usual winding method, and to produce this with the current winding equipment. You can do it.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a coil component having _three coils L ₁ , L ₂ , L ₃ , a plurality of winding grooves 2, a plurality of flanges 3 forming the winding grooves 2, and implanted in the flange 3. Metal terminal 4
Is used. This coaxial bobbin 1
Is formed such that the winding groove 2 and the flange 3 are orthogonal to the central axis of the coaxial bobbin 1. In this coil component, a conductor is wound in the winding groove 2a, and after a half-turn winding, the conductor is guided to the adjacent winding groove 2b so as to straddle the outer periphery of the flange 3a, and is wound half a turn, and then the conductor is again guided to the winding groove 2a. To form a one-turn inclined loop coil with respect to the central axis of the coaxial bobbin 1,
After repeating this, connection to the metal terminal 4 is performed, and this is repeated sequentially to form the coils L ₁ , L ₂ , L ₃ .

[0017] Each coil L _1, L _2, L ₃ is centered is in a straight line, and since the flange 3 are arranged in a direction perpendicular to this straight line, U-inclined loop by inducing conductor The coil can be continuously wound, and can be mass-produced with existing winding equipment.

Further, since the directions of the magnetic fluxes of the coils L ₁ , L ₂ , L ₃ are selected so as to be on a parallel line, the interlinking magnetic flux is small, and the direction of the magnetic flux between the coils L ₁ , L ₂ , L ₃ is small. Magnetic coupling is reduced.

In order to control the magnetic coupling, the winding direction of each coil is changed to change the polarity of the coil.
In this case, the conductor can be easily controlled by winding the conductor to a coil to be coupled while winding it for half a turn or more, winding an appropriate number of turns on or under the coil, and then connecting to a predetermined metal terminal 4.

[0020] In addition, as shown in FIG. 3, across the brim 3
Wind the conductor one or more turns without straddling the winding grooves 2 on both sides
The coil L ₅ of a non-tilted loop provided, can be easily controlled even magnetic coupling by combining with the coil L ₄ of the inclined loop coil L ₅ Non inclined loop.

In the case of a coil having a large inductance, the outer shape of the coil component increases in accordance with the number of turns in the prior art, but in this embodiment, the winding groove 2 is formed in a concave shape with respect to the flange 3. Therefore, it is difficult for the center of the coil of the inclined loop to overlap on the flange 3, and the outer shape of the coil is prevented from increasing. Further, as shown in FIG. 2, the shape of the coil can be reduced by subdividing the winding groove 2. The same effect can be obtained by using the method shown in FIG.

As shown in FIGS. 4A and 4B,
By providing the protrusion 3 for guiding the conductor on the flange 3, it is possible to prevent the conductor from spreading on the outer peripheral surface of the flange 3. In this case, a similar effect can be obtained not only in the protrusion 5 but also in the notch groove, and their shape is arbitrary and is not limited.

Further, in a coil formed by winding, generally, the larger the winding diameter of the coil, the larger the Q of the coil. Therefore, when the coil component according to the present invention is compared with the conventional coil component of FIG. 9 as equivalent external dimensions and inductance values,
Because of the inclined loop, the coil has a large winding diameter, so that the Q value of the coil is increased, and the performance as a coil component is improved.

FIG. 5 and FIG. 6 utilize the above effect. The circuit shown in FIG. 5, a low-pass filter 6, to form a trap circuit 7 in coil L ₁ and capacitor C _1. Trap circuit 7 is higher Q of the coil L ₁ is high, the attenuation characteristic is improved. Therefore, if the inductance portion of the low-pass filter 6 is formed by the coil component shown in FIG. 1, a component having better performance than the conventional coil component can be realized.

Further, as shown in FIG. 6, by providing a screw hole 8 in the flange 3 of the coil L ₁ constituting the trap circuit and inserting the magnetic body 9, the coil L ₁ can be independently varied. , it is possible to finely adjust the coil L ₁ and the trap circuit. In this case, the place where the magnetic body 9 is inserted may be a through hole or a hole other than the screw hole 8, for example, and the shape and the number are not limited. Similarly, the shape, material, and insertion method of the magnetic body 9 are also arbitrary, and are not limited.

Furthermore a coil L ₆ of the inclined loop with windings at different bobbin 10 of the reel diameter, as shown in FIG. 7,
The coil L ₇ is formed in a small winding grooves of the winding shaft diameter, by selecting the windings of the coil L _7, it is possible to finely adjust the combined inductance value of the coil L ₆ and the coil L _7.

[0027] In this embodiment, although the magnetic flux direction of the coil L ₆ of the inclined loop is selected inclination angle to be parallel, the inclined oblique angle is arbitrary, but is not limited. The combination of the coil L ₇ numbers and non-tilted loop coil L ₆ of the inclined loop is arbitrary.

Further, the number of flanges, the number of winding grooves, and the number of windings for forming the inclined loop are arbitrary, and a coil component as shown in FIG. 8 can also be formed. That is, the coaxial bobbin 1 shown in FIG.
Substantially identical to protrude winding shaft portion 1a outward from the flange 3 of both ends, or to form a coil L ₁ of the inclined loop winding to the winding shaft portion 1a on the outer periphery of hooked like flange 3 It may be configured by winding superposed or form a coil L ₈ of the inclined loop to span between the two flange 3, a coil L ₉ inclined in the opposite direction to the coil L ₂ of the inclined loop. With this coil component, it is possible to finely control the magnetic coupling, the Q of the coil, and the inductance value.

[0029]

As described above, according to the present invention, the magnetic coupling between the coils of a coil component having a plurality of coils can be more finely controlled. In addition, since the Q of the coil can be increased without increasing the shape, the performance of the coil component can be improved. Further, since a non-inclined loop winding is also possible, a coil component having various winding specifications can be formed.

Further, a wide variety of applications such as insertion of a magnetic material can be performed. Further, since the winding method is the same as that of the conventional coaxial bobbin, it is not necessary to modify the production equipment such as the winding machine.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of a coil component of the present invention.

FIG. 2 is a front view of another embodiment.

FIG. 3 is a front view of the other embodiment.

FIGS. 4A and 4B are front and side views of another embodiment.

FIG. 5 is a circuit diagram of an LC low-pass filter using the coil component of FIG. 1;

FIG. 6 is a front view of still another embodiment.

FIG. 7 is a front view of another embodiment.

FIG. 8 is a front view of another embodiment.

FIG. 9 is a partially cutaway front view showing a conventional coil component.

FIG. 10 is an explanatory view showing magnetic coupling of the coil component of FIG. 9;

FIG. 11 is a partially cutaway front view showing another example of the related art.

FIG. 12 is a front view showing still another conventional example.

[Explanation of symbols]

1 coaxial bobbin 2 winding grooves 3 flange 4 metal terminals 5 projecting 8 screw hole 9 magnetic L ₁ ~L ₉ coil

Claims (5)

(57) [Claims] A coaxial bobbin is provided with a plurality of winding grooves orthogonal to a central axis thereof and a plurality of flanges constituting the winding grooves, and the conductor is wound at least one turn over the coaxial bobbin over both winding grooves sandwiching the flange. coil component having a coil of the inclined loop turning. 2. The coil component according to claim 1, wherein a protrusion or a notch for guiding the conductor is provided on the flange. 3. The coil component according to claim 1, wherein a hole, a through hole, or a screw hole is provided in a flange or a winding groove serving as a center of the inclined loop, and a magnetic material is inserted therein. [4] without straddling the winding grooves on both sides of the brim
Install a non-inclined loop coil with one or more turns of conductor
2. The coil component according to claim 1 , wherein the coil of the inclined loop and the coil of the non-inclined loop are combined. 5. The coil component according to claim 1, wherein a plurality of coils are formed by sequentially winding the conductor while relaying the conductor to a terminal or a protrusion provided in a flange or a winding groove.