JP2012028558A - Electronic component - Google Patents

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Publication number
JP2012028558A
JP2012028558A JP2010165842A JP2010165842A JP2012028558A JP 2012028558 A JP2012028558 A JP 2012028558A JP 2010165842 A JP2010165842 A JP 2010165842A JP 2010165842 A JP2010165842 A JP 2010165842A JP 2012028558 A JP2012028558 A JP 2012028558A
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coil
electronic component
ferrite core
axis direction
base
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JP2010165842A
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JP5617411B2 (en
Inventor
Toshio Kitagawa
Toshinori Murakami
Yoshimi Tanaka
利雄 北川
敏則 村上
良巳 田中
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Murata Mfg Co Ltd
株式会社村田製作所
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Abstract

PROBLEM TO BE SOLVED: To provide an electronic component suitable for a surface mount.SOLUTION: Coils 3a and 3b are formed respectively with conductor wires in a rectangular wire shape wound in a spiral shape around an annular ferrite core 2. A base 5 supports coils 3a and 3b. Conductor wire ends are pulled out from the coils 3a and 3b to a mounting surface of the base 5 and constitute external electrodes 36a and 36b.

Description

  The present invention relates to an electronic component, in particular, an electronic component including a coil made of a conductive wire.

  As a conventional electronic component, for example, a common mode choke coil described in Patent Document 1 is known. FIG. 5 is an external perspective view of the common mode choke coil 500 described in Patent Document 1. FIG.

  The common mode choke coil 500 of FIG. 5 includes bobbins 501 and 502, windings 504 and 505 wound around the bobbins 501 and 502, cores 506 and 507 having one side inserted through the bobbins 501 and 502, It comprises a base 508 for supporting the cores 506 and 507. The core 506 has a Japanese character shape, and the core 507 has a square shape.

  The common mode choke coil 500 is mounted on the circuit board by the method described below. First, a pin-like terminal 509 protruding from the back surface of the base 508 is inserted into a hole provided in the circuit board from the front side of the circuit board. Further, the terminal 509 protruding from the back surface of the circuit board is soldered.

  Incidentally, there is a demand for enabling surface mounting in an electronic component such as the common mode choke coil described in Patent Document 1. Surface mounting refers to solder mounting an electronic component provided with a planar external electrode on a mounting surface on a circuit board having a land with the external electrode facing the land.

JP-A-8-213242

  Accordingly, an object of the present invention is to provide an electronic component having a coil and a structure suitable for surface mounting.

  An electronic component according to an aspect of the present invention includes a spiral first coil made of a flat first wire, and a base for supporting the first coil. An end portion of one of the conducting wires constitutes a first external electrode by being drawn out along the mounting surface of the base.

  ADVANTAGE OF THE INVENTION According to this invention, the electronic component which has a coil and has a structure suitable for surface mounting can be provided.

It is a disassembled perspective view of an electronic component. It is an exploded view of an electronic component. FIG. 3A is a plan view of the electronic component from the positive side in the z-axis direction. FIG. 3B is a plan view of the electronic component from the negative direction side in the y-axis direction. FIG. 3C is a plan view of the electronic component from the negative direction side in the z-axis direction. FIG. 4 is a cross-sectional structure view of the external electrode shown in FIG. 2 is an external perspective view of a common mode choke coil described in Patent Document 1. FIG.

  Hereinafter, an electronic component according to an embodiment of the present invention will be described with reference to the drawings.

(Configuration of electronic parts)
First, the configuration of an electronic component according to an embodiment of the present invention will be described with reference to the drawings. An electronic component according to an embodiment of the present invention is a common mode choke coil including two coils and functions as a noise filter.

  FIG. 1 is an exploded perspective view of the electronic component 1. In the present embodiment, the direction in which the coil axis of the coil 3 of the electronic component 1 extends is defined as the z-axis direction. When the coil is viewed in plan from the z-axis direction, the direction in which the long side of the electronic component 1 extends is defined as the x-axis direction. When the electronic component 1 is viewed in plan from the z-axis direction, the direction in which the short side of the electronic component 1 extends is defined as the y-axis direction. The x-axis direction, the y-axis direction, and the z-axis direction are orthogonal to each other. FIG. 2 is an exploded view of the electronic component 1. FIG. 3A is a plan view of the electronic component 1 from the positive side in the z-axis direction. FIG. 3B is a plan view of the electronic component 1 as viewed from the negative direction side in the y-axis direction. FIG. 3C is a plan view of the electronic component 1 as viewed from the negative direction side in the z-axis direction.

  As shown in FIG. 1, the electronic component 1 includes a ferrite core 2, coils 3 (3 a and 3 b), a base 5, a case 6, and a fastener 8.

  As shown in FIG. 1, the coil 3 a is a spiral coil formed by winding a rectangular wire. A flat wire-like conducting wire is a conducting wire having a cross-sectional shape having a longitudinal direction such that the cross-section is rectangular or elliptical. As shown in FIGS. 2 and 3A, the coil 3a has a coil portion 30a and lead portions 32a and 34a (only the lead portion 34a is shown in FIG. 3A).

  As shown in FIGS. 1 and 3A, the coil portion 30a has a spiral shape that advances clockwise from the positive direction side in the z-axis direction while turning clockwise. The coil portion 30a has a constant diameter and has a cylindrical shape extending in the z-axis direction. Thereby, the coil part 30a has the coil axis | shaft Ax1 extended in az axis direction, as shown in FIG.

  As shown in FIGS. 1 to 3, the lead portion 32a is connected to the end portion on the negative side in the z-axis direction of the coil portion 30a, and is drawn out to the negative direction side in the z-axis direction with respect to the coil portion 30a. It is. Further, the lead portion 32a has an external electrode 36a at the tip thereof. The external electrode 36a is formed by peeling off the coating of the leading end of the lead portion 32a and applying solder.

  As shown in FIG. 3, the lead-out portion 34a is connected to the end portion on the positive side in the z-axis direction of the coil portion 30a, and on the side of the coil portion 30a, from the positive direction side in the z-axis direction to the negative direction. By extending to the side, the coil portion 30a is drawn to the negative direction side in the z-axis direction. Further, the lead portion 34a has an external electrode 38a at the tip thereof. Here, as shown to Fig.3 (a), the drawer | drawing-out parts 32a and 34a are pulled out from the coil axis | shaft Ax1 to the negative direction side of the x-axis direction. Further, the lead-out part 34a is located on the positive side of the y-axis with respect to the lead-out part 32a. Accordingly, as shown in FIG. 3C, the external electrode 38a is located on the positive side in the y-axis direction with respect to the external electrode 36a.

  Next, the coil 3b will be described. As shown in FIG. 1, the coil 3 b is a spiral coil formed by winding a flat wire. As shown in FIG. 2, the coil 3b has a coil portion 30b and lead portions 32b and 34b (the lead portion 34b is shown only in FIG. 3A).

  As shown in FIGS. 1 and 3A, the coil portion 30b has a spiral shape that advances from the positive side in the z-axis direction toward the negative side while turning counterclockwise. The coil portion 30b has a constant diameter and has a cylindrical shape extending in the z-axis direction. Thereby, the coil part 30b has the coil axis | shaft Ax2 extended in az axis direction, as shown in FIG.

  The lead portion 32b is connected to the end portion on the negative direction side in the z-axis direction of the coil portion 30b, and is drawn out to the negative direction side in the z-axis direction with respect to the coil portion 30b. The lead portion 32b has an external electrode 36b at its tip. The external electrode 36b is formed by peeling off the coating of the leading end of the lead portion 32b and applying solder.

  As shown in FIG. 3, the lead-out part 34b is connected to the end part on the positive direction side in the z-axis direction of the coil part 30b, and on the side of the coil part 30b, from the positive direction side in the z-axis direction to the negative direction. By extending to the side, the coil portion 30b is drawn to the negative direction side in the z-axis direction. The lead portion 34b has an external electrode 38b at its tip. Here, as shown to Fig.3 (a), the drawer | drawing-out parts 32b and 34b are pulled out by the positive direction side of the x-axis direction rather than coil axis | shaft Ax2. Further, the lead portion 34b is located on the positive side of the y axis with respect to the lead portion 32b. Accordingly, as shown in FIG. 3C, the external electrode 38b is located on the positive side in the y-axis direction with respect to the external electrode 36b.

  In the coils 3a and 3b configured as described above, the coil axis Ax1 of the coil 3a and the coil axis Ax2 of the coil 3b are parallel to each other. Furthermore, the coil 3a and the coil 3b are arranged in a direction orthogonal to the coil axes Ax1, Ax2 (that is, the x-axis direction). The coil 3a (the conducting wire) and the coil 3b (the conducting wire) are wound in opposite directions when the conducting wire is viewed from the positive direction in the z-axis direction.

  Next, the ferrite core 2 will be described. As shown in FIG. 3B, the ferrite core 2 is an annular (b-shaped) magnetic body (soft ferrite material) around which coils 3a and 3b are wound. That is, the ferrite core 2 passes through the coils 3a and 3b. And the ferrite core 2 can be divided | segmented into the ferrite core upper part 20a and the ferrite core lower part 20b, as shown in FIG. Examples of the material of the ferrite core 2 include a Ni—Zn based magnetic material having an initial permeability of 2000. When the initial permeability of the ferrite core 2 is 2000, noise countermeasures can be taken in the frequency band of 10 KHz to 500 MHz. When the initial permeability of the ferrite core 2 is 1400, it can be used at a high temperature of 125 ° C., for example.

  As shown in FIG. 2, the ferrite core upper part 20a is integrally formed in a U-shape and has rod-like parts 22a and 24a and a connecting part 26a. As shown in FIG. 2, the ferrite core lower part 20b is U-shaped and has rod-like parts 22b and 24b and a connecting part 26b.

  The rod-like portions 22a and 24a are columnar members extending in the z-axis direction and are arranged in the x-axis direction. The connecting portion 26a connects the ends of the rod-like portions 22a and 24a on the positive direction side in the z-axis direction. The rod-like portions 22b and 24b are columnar members extending in the z-axis direction and are arranged in the x-axis direction. The connecting portion 26b connects the end portions on the negative direction side in the z-axis direction of the rod-like portions 22b and 24b. Thereby, each of the ferrite core upper part 20a and the ferrite core lower part 20b has a U-shape.

  Each of the rod-like portions 22a and 24a has contact surfaces S1 and S2 at the end on the negative direction side in the z-axis direction. Further, the rod-like portions 22b and 24b have contact surfaces S3 and S4 at the ends on the positive direction side in the z-axis direction, respectively. The contact surface S1 and the contact surface S3 are in contact with each other so as to face each other. Similarly, the contact surface S2 and the contact surface S4 are in contact with each other so as to face each other. Thereby, the ferrite core 2 which consists of the ferrite core upper part 20a and the ferrite core lower part 20b has comprised the square shape. Note that the contact surfaces S1 to S4 are polished.

  Further, when the ferrite core 2 is assembled, the rod-like portion 22a is inserted into the coil portion 30a from the positive direction side in the z-axis direction. Further, the rod-shaped portion 22b is inserted into the coil portion 30a from the negative direction side in the z-axis direction. The rod-shaped part 24a is inserted into the coil part 30b from the positive direction side in the z-axis direction. The rod-shaped part 24b is inserted into the coil part 30b from the negative direction side in the z-axis direction. Thereby, coil part 30a, 30b forms the closed magnetic circuit. Then, a common mode choke coil in which the coils 3a and 3b are wound around the ferrite core 2 is obtained.

  Further, as shown in FIGS. 3A and 3B, the diameter of the coil 3 is shorter than the length of the ferrite core 2 in the z-axis direction.

  Next, the fastener 8 will be described. As shown in FIG. 2, the fastener 8 is a U-shaped leaf spring that fixes the ferrite core upper portion 20 a and the ferrite core lower portion 20 b so as not to be separated. The stopper 8 is formed by bending a single metal plate into a U-shape. Examples of the material of the fastener 8 include stainless steel that is heat resistant and has little deterioration over time with respect to temperature and humidity.

  As shown in FIG. 2, the fastener 8 has plate-like portions 80, 82, and 84. The plate-like portion 80 is a rectangular metal plate extending in the z-axis direction. The length of the plate-like portion 80 in the z-axis direction is slightly longer than the length of the ferrite core 2 in the z-axis direction. The plate-like portion 82 is formed by bending the end of the fastener 8 on the positive side in the z-axis direction to the positive side in the y-axis direction. The plate-like portion 84 is formed by bending the end of the fastener 8 on the negative side in the z-axis direction to the positive side in the y-axis direction. As a result, the stopper 8 is U-shaped. However, in the state where the fastener 8 is not attached to the ferrite core 2, the distance between the plate-like portion 82 and the plate-like portion 84 is shorter than the length of the ferrite core 2 in the z-axis direction. Therefore, when the fastener 8 is attached to the ferrite core 2, the space between the plate-like portion 82 and the plate-like portion 84 is widened, and the ferrite core 2 is interposed between the plate-like portion 82 and the plate-like portion 84. Inserted. Thereby, the fastener 8 is fixed in a state where the ferrite core 2 is sandwiched by the elastic force of the metal.

  As shown in FIG. 2, the fastener 8 is attached to the ferrite core 2 from the negative direction side in the y-axis direction, and holds the ferrite core upper portion 20a and the ferrite core lower portion 20b. More specifically, the plate-like portion 80 contacts the ferrite core 2 inserted in the coils 3a and 3b from the negative direction side in the y-axis direction. The plate-like portion 82 contacts the connecting portion 26a on the positive side in the z-axis direction. On the other hand, the plate-like portion 84 contacts the connecting portion 26b from the negative direction side in the z-axis direction. Thus, the ferrite core upper part 20a and the ferrite core lower part 20b are held so as not to be separated.

  Next, the base 5 will be described. As shown in FIGS. 1 and 2, the base 5 is a rectangular plate-like member that supports the ferrite core 2, the coil 3, and the fastener 8. As the material of the base 5, a material having heat resistance and capable of withstanding the reflow soldering temperature (peak temperature 260 ± 5 ° C.) is used. Hereinafter, the surface on the positive side in the z-axis direction of the base 5 is referred to as an upper surface, and the surface on the negative direction side in the z-axis direction of the base 5 is referred to as a lower surface (mounting surface). Further, the other surface of the base 5 is referred to as a side surface.

  As shown in FIG. 2, the base 5 is provided with a cavity G <b> 1 and recesses G <b> 4 to G <b> 7. The cavity G1 is formed by denting the main surface of the base 5 on the positive side in the z-axis direction. A structure including the ferrite core 2, the coil 3, and the fastener 8 is attached to the cavity G1. Specifically, the inner peripheral surface of the cavity portion G1 has a shape that follows the shapes of the fastener 8 and the connection portion 26b. And the connection part 26b of the ferrite core lower part 20b to which the fastener 8 is attached is inserted into the cavity part G1. As a result, the coil axes Ax1 and Ax2 of the coils 3a and 3b are perpendicular to the lower surface of the base 5 and extend in the z-axis direction.

  The recesses G4 to G7 are recesses into which the lead portions 32a, 32b, 34a, and 34b are fitted when the structure including the ferrite core 2, the coil 3, and the fastener 8 is attached to the base 5. More specifically, the recesses G4 and G6 extend in the z-axis direction so as to connect the upper surface and the lower surface on the negative side surface in the x-axis direction of the base 5 and are negative in the x-axis direction on the lower surface of the base 5. The groove extends from the short side on the direction side toward the positive direction side in the x-axis direction. The recess G6 is located on the positive direction side in the y-axis direction with respect to the recess G4. The recesses G5 and G7 extend in the z-axis direction so as to connect the upper surface and the lower surface on the positive side surface in the x-axis direction of the base 5, and the short side on the positive side in the x-axis direction on the lower surface of the base 5 Is a groove extending toward the negative side in the x-axis direction. The recess G7 is located on the positive side in the y-axis direction with respect to the recess G5.

  As shown in FIGS. 2 and 3, the lead portions 32 a, 32 b, 34 a, 34 b are fitted in the recesses G <b> 4 to G <b> 7 so as to be along the side surface and the lower surface of the base 5. As a result, the ends of the conducting wires of the coils 3a and 3b are drawn out from the coils 3a and 3b along the mounting surface of the base 5, and constitute external electrodes 36a, 36b, 38a, and 38b. The external electrodes 36 a, 36 b, 38 a, 38 b are fixed to the base 5 by being fitted into the recesses G 4 to G 7 provided on the lower surface of the base 5. At this time, the external electrodes 36a, 36b, 38a, 38b have a rectangular cross-sectional structure as shown in FIG. 4, and the y-axis direction and the longitudinal direction thereof coincide with each other on the mounting surface of the base 5. So that it is fixed. As shown in FIG. 3B, the external electrodes 36a, 36b, 38a, and 38b are slightly protruded from the lower surface of the base 5 so that the external electrodes 36a, 36b, 38a, and 38b can easily come into contact with the lands of the circuit board during mounting.

  Next, the case 6 will be described. As shown in FIG. 2, the case 6 is a rectangular parallelepiped box-shaped member that covers a structure including the ferrite core 2, the coil 3, and the fastener 8. The case 6 has an opening on the negative side in the z-axis direction. As the material of the case 6, a member having heat resistance and capable of withstanding the reflow soldering temperature (peak temperature 260 ± 5 ° C.) is used.

  The case 6 accommodates a structure composed of the ferrite core 2, the coil 3, and the fastener 8. More specifically, the case 6 has an inner peripheral surface S10 that follows the shape of the structure including the ferrite core 2, the coil 3, and the fastener 8. The inner peripheral surface S10 is in contact with the structure and has a shape that holds the structure.

  The operation of the electronic component 1 having the above configuration will be described. The coil 3 is electrically connected to two signal lines disposed between a power source and a load such as an electronic device. When a signal carrying common mode noise flows through the coils 3a and 3b, magnetic flux is generated in the two coils. These magnetic fluxes circulate around the ferrite core 2 in the same direction. Accordingly, the two magnetic fluxes circulate around the ferrite core 2 having a high magnetic permeability in a state of being added together. Here, since the ferrite core 2 forms a closed magnetic circuit, the magnetic flux does not leak to the outside greatly. Therefore, the magnetic flux is converted into thermal energy by eddy current loss or the like, and gradually attenuates. Thereby, common mode noise is reduced.

(effect)
As will be described below, the electronic component 1 has a structure suitable for surface mounting. FIG. 4 is a cross-sectional structure diagram of the external electrode 36a shown in FIG.

  In the common mode choke coil 500 described in Patent Document 1 shown in FIG. 5, the pin-shaped terminal 509 protrudes to the negative direction side in the z-axis direction. Therefore, the common mode choke coil 500 is not suitable for surface mounting.

  On the other hand, in the electronic component 1, the end portion of the flat rectangular wire is drawn out from the coil 3 along the mounting surface of the base 5, thereby constituting external electrodes 36 a, 36 b, 38 a, 38 b. As shown in FIG. 4, the flat rectangular wire has a rectangular cross-sectional structure, and is provided on the mounting surface of the base 5 so that the y-axis direction coincides with the longitudinal direction thereof. Therefore, in the external electrodes 36a, 36b, 38a, 38b, the area of the portion parallel to the mounting surface of the base 5 is increased. As a result, as shown in FIG. 4, the contact area between the external electrodes 36a, 36b, 38a, 38b and the land of the circuit board is increased. As described above, the electronic component 1 has a structure suitable for surface mounting.

  In the electronic component 1, it is possible to reduce the resistance. More specifically, in the electronic component 1, the coils 3 a and 3 b are configured using a flat wire-like conducting wire. Therefore, both ends of a flat wire can be used as the external electrodes 36a, 36b, 38a, 38b. Therefore, in the electronic component 1, it is not necessary to connect external electrodes to both ends of the conducting wire. As a result, in the electronic component 1, there is no connection between the conductor and the external electrodes 36a, 36b, 38a, 38b, and the resistance between them is reduced. Therefore, the resistance of the electronic component 1 can be reduced.

  Further, in the electronic component 1, the mounting area can be reduced. More specifically, in this embodiment, as shown in FIG. 3, the diameters of the two coils 3a and 3b are shorter than the length of the ferrite core 2 in the z-axis direction. Therefore, the coil axes Ax1 and Ax2 are parallel to the z-axis direction. Thereby, it can be made smaller than the mounting area of the coil 3 and the ferrite 2 when the coil axes Ax1 and Ax2 of the coil 3 are parallel to the y-axis direction.

  The coils 3a and 3b have coil axes Ax1 and Ax2 parallel to the z-axis direction, and are wound in opposite directions with respect to the coil axes Ax1 and Ax2 when viewed from the z-axis direction. As a result, when a current flows through the coils 3a and 3b in the opposite directions when viewed in plan from the z-axis direction, the magnetic fields generated by the coils 3a and 3b cancel each other. As a result, no magnetic field is generated, and adverse effects due to the magnetic field on the surrounding circuits are reduced.

  In the coil 3, by making the conducting wire into a rectangular wire shape, the conducting wires can be brought into close contact and wound. Therefore, it is difficult for a gap to be generated between the conductors. By reducing the gap between the conductors, heat conduction is likely to occur between the conductors. Therefore, heat dissipation is improved in the electronic component 1.

  Furthermore, when a rectangular wire is used in the electronic component 1, the gap between the wires is smaller than when a round wire is used in the electronic component. Thereby, in the electronic component 1, size reduction can be achieved compared with the electronic component using the round conducting wire.

  Moreover, the flat wire-shaped conducting wire has a larger cross-sectional area than the round conducting wire. Therefore, the electronic component 1 using a flat wire lead has a smaller electrical resistance than an electronic component using a round wire. Therefore, in the electronic component 1, a large current can be achieved. For example, in the electronic component 1 having a coil size of 1.0 mm × 0.3 mm and a number of turns of 9T, a current of 6 A can be passed. An electronic component having a coil size of 1.0 mm × 0.46 mm and having a number of turns of 6T can pass a current of 10 A.

  Further, since the contact surfaces S1 to S4 of the ferrite core 2 are polished and finished to be flat, they come into close contact with each other. As a result, the magnetic path resistance in the ferrite core 2 is reduced.

  Further, the inner peripheral surface S <b> 10 of the case 6 has a shape that follows the shape of the ferrite core 2, the coil 3, and the fastener 8. Therefore, when the winding direction of the coil 3 is wrong, the inner peripheral surface S10 is caught by the coil 3. Therefore, the case 6 can be prevented from being assembled by mistake.

(Other embodiments)
The electronic component 1 configured as described above is not limited to that shown in the embodiment. Therefore, the electronic component 1 can be changed within the scope of the gist.

  In the electronic component 1, the winding directions of the coils 3a and 3b are opposite to each other when viewed in plan from the positive direction side in the z-axis direction. However, the winding direction of the coils 3a and 3b may be the same when viewed from the positive side in the z-axis direction. However, in the external electrodes 36a, 36b, 38a, 38b, it is necessary to exchange the input terminal and the output terminal. More specifically, when the winding directions of the coils 3a and 3b are opposite directions, the external electrodes 36a and 36b are used as input terminals, and the external electrodes 38a and 38b are used as output terminals. Alternatively, the external electrodes 36a and 36b are used as output terminals, and the external electrodes 38a and 38b are used as input terminals. At this time, the electronic component 1 exhibits a function as a common mode choke coil.

  On the other hand, when the winding directions of the coils 3a and 3b are the same, the external electrodes 36a and 38b are used as input terminals, and the external electrodes 38a and 36b are used as output terminals. Alternatively, the external electrodes 36a and 38b are used as output terminals, and the external electrodes 38a and 36b are used as input terminals. At this time, the electronic component 1 exhibits a function as a common mode choke coil. In this way, the pair of coils 3a and 3b can be used as a 2-in-1 shape and used as a choke coil.

  Moreover, although the ferrite core 2 is comprised by two members, the ferrite core upper part 20a and the ferrite core lower part 20b, you may be comprised by one cyclic | annular member.

  As described above, the present invention is excellent in that it is useful for electronic components and is suitable for surface mounting.

G1 Cavity G4 to G7 Recess S1 to S4 Contact surface S10 Inner peripheral surface Ax1, Ax2 Coil shaft 1 Electronic component 2 Ferrite core 3a, 3b Coil 5 Base 6 Case 8 Fastener 20a Ferrite core upper portion 20b Ferrite core lower portion 22a, 22b, 24a, 24b Rod-like part 26a, 26b Connection part 30a, 30b Coil part 32a, 32b, 34a, 34b Lead part 36a, 36b, 38a, 38b External electrode 80, 82, 84 Plate-like part

Claims (9)

  1. A spiral first coil composed of a flat wire first conductor;
    A base for supporting the first coil;
    With
    The end portion of the first conductive wire constitutes a first external electrode by being drawn out along the mounting surface of the base,
    Electronic parts characterized by
  2. A ferrite core passing through the first coil,
    More
    The electronic component according to claim 1.
  3. A second coil that constitutes the first coil and the common mode choke coil, and a spiral second coil composed of a rectangular second conductor,
    In addition,
    The ferrite core passes through the second coil,
    The end portion of the second conducting wire constitutes a second external electrode by being drawn out along the mounting surface of the base,
    The electronic component according to claim 2.
  4. The coil axis of the first coil and the coil axis of the second coil are parallel,
    The first coil and the second coil are provided so as to be aligned in a direction perpendicular to the coil axis;
    The electronic component according to claim 3.
  5. The coil axis of the first coil and the coil axis of the second coil are perpendicular to the mounting surface;
    The electronic component according to claim 3, wherein:
  6. The ferrite core has an annular shape,
    The diameter of the first coil and the diameter of the second coil are shorter than the length of the ferrite core in the direction in which the coil axis extends;
    The electronic component according to claim 4, wherein:
  7. The ferrite core is separable,
    The contact surface between the divided ferrite cores is polished,
    The electronic component according to claim 6.
  8. A case for housing the first coil;
    In addition,
    The inner peripheral surface of the case has a shape for holding the first coil;
    The electronic component according to claim 1, wherein:
  9. The mounting surface of the base is provided with a recess for fixing the first external electrode;
    The electronic component according to claim 1, wherein:
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Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0536822U (en) * 1991-10-16 1993-05-18 松下電器産業株式会社 Common mode switch yoke coil
JPH088115A (en) * 1994-06-23 1996-01-12 Tokin Corp Inductor
JPH08298217A (en) * 1993-01-29 1996-11-12 Toudai Musen Kk Line filter and core band therefor
JPH11144973A (en) * 1997-11-05 1999-05-28 Sumida Denki Kk Inductance element
JPH11297545A (en) * 1998-04-15 1999-10-29 Hitachi Ferrite Denshi Kk Power feeding choke coil
JP2001093757A (en) * 1999-09-27 2001-04-06 Tdk Corp Surface mount common mode choke coil
JP2001155932A (en) * 1999-11-29 2001-06-08 Sumitomo Special Metals Co Ltd Inductor
JP2002093634A (en) * 2000-09-19 2002-03-29 Matsushita Electric Ind Co Ltd Low-profile transformer
JP2005302926A (en) * 2004-04-09 2005-10-27 Cosel Co Ltd Ferrite core and method of manufacturing inductor
JP2005353989A (en) * 2004-06-14 2005-12-22 Jfe Ferrite Corp Complex inductor
JP2007095948A (en) * 2005-09-28 2007-04-12 Tdk Corp Coil component
JP2008227019A (en) * 2007-03-09 2008-09-25 Tdk Corp Inductance element, and line filter

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0536822U (en) * 1991-10-16 1993-05-18 松下電器産業株式会社 Common mode switch yoke coil
JPH08298217A (en) * 1993-01-29 1996-11-12 Toudai Musen Kk Line filter and core band therefor
JPH088115A (en) * 1994-06-23 1996-01-12 Tokin Corp Inductor
JPH11144973A (en) * 1997-11-05 1999-05-28 Sumida Denki Kk Inductance element
JPH11297545A (en) * 1998-04-15 1999-10-29 Hitachi Ferrite Denshi Kk Power feeding choke coil
JP2001093757A (en) * 1999-09-27 2001-04-06 Tdk Corp Surface mount common mode choke coil
JP2001155932A (en) * 1999-11-29 2001-06-08 Sumitomo Special Metals Co Ltd Inductor
JP2002093634A (en) * 2000-09-19 2002-03-29 Matsushita Electric Ind Co Ltd Low-profile transformer
JP2005302926A (en) * 2004-04-09 2005-10-27 Cosel Co Ltd Ferrite core and method of manufacturing inductor
JP2005353989A (en) * 2004-06-14 2005-12-22 Jfe Ferrite Corp Complex inductor
JP2007095948A (en) * 2005-09-28 2007-04-12 Tdk Corp Coil component
JP2008227019A (en) * 2007-03-09 2008-09-25 Tdk Corp Inductance element, and line filter

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