JP2005159023A - Coil device and switching power supply module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce cost, with respect to a core combination member of a coil device. <P>SOLUTION: In the coil device having a pair of core members 4a, 4b, equipped on a coil pattern under a configuration of pinching at least one part of a coil pattern formed on the circuit substrate 2 from both front and rear sides of the circuit board 2, and a core combination member 20 for combining the core members 4a, 4b, the core combination member 20 is provided with a leg unit 22, penetrated through the core leg by a through hole 6 of the circuit substrate 2. Since the core combination member 20 can combine the core members 4a, 4b by a single component, whereby the cost can be saved, as compared with a case when two components are employed. The adjustment of the cores can be effected, under the condition where the core members 4a, 4b are combined through a cutting and removing part 25 for the clearance of the leg unit 22, as it is. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a coil device that functions as a transformer, an inductor, and the like, and a switching power supply module configured by using the coil device.

  FIG. 8A schematically shows an example of a coil device in an exploded state, and FIG. 8B schematically shows a state of the coil device shown in FIG. 8A viewed from the front side. FIG. 8C schematically shows a state where the coil device shown in FIG. 8A is viewed from the right side.

  This coil device 1 is described in Patent Document 1 (Japanese Patent Laid-Open No. 2002-246236). The coil device 1 can be incorporated in an electric circuit such as a switching power supply circuit and function as a transformer, an inductor, or the like. Is. The coil device 1 includes a circuit board 2, a coil pattern 3 formed on the circuit board 2, and a pair of coils provided in the coil pattern 3 in a form in which at least a part of the coil pattern 3 is sandwiched from both the front and back sides of the circuit board 2. The core member 4 (4a, 4b) and the core foot 5 provided on one side of the pair of core members 4a, 4b (core member 4b in the illustrated example) provided in the coil pattern formation region of the circuit board 2 are inserted. And a core combination member 7 that holds the pair of core members 4a and 4b in combination using the core foot insertion through hole 6.

  In the coil device 1 of FIG. 8, the core member 4a is an I-type core member, and the core member 4b is an E-type core member. The I-type core member 4a is arranged on the front surface side of the circuit board 2, and the E-type core member 4b is arranged on the back surface side of the circuit board 2, and three core legs provided on the E-type core member 4b. 5 (5a, 5b, 5c) are respectively inserted into the corresponding core foot insertion through holes 6 (6a, 6b, 6c) from the back side of the circuit board 2, and the front end surfaces of the core feet 5a, 5b, 5c and I The pair of core members 4 a and 4 b are combined by the core combination member 7 in a state where the core member 4 a of the mold is in contact with the closed magnetic path.

  The core combination member 7 includes a front surface side cover member 10 and a back surface side cover member 11. The front surface side cover member 10 includes a base surface portion 10ba and leg portions 10R and 10L which are erected on both the left and right sides of the base surface portion 10ba. Similarly, the back surface side cover member 11 has a base surface portion 11ba and leg portions 11R and 11L which are provided upright on both the left and right sides of the base surface portion 11ba.

  The front surface side cover member 10 and the rear surface side cover member 11 sandwich the pair of core members 4a and 4b from the front and back sides between the respective base surface portions 10ba and 11ba, thereby fitting the leg portions 10R and 11R and the leg portions 10L and 11L to each other. The pair of core members 4a and 4b are sandwiched. In the illustrated example, the leg portions 10R, 10L of the front surface side cover member 10 and the leg portions 11R, 11L of the back surface side cover member 11 are fitted with the leg portions 11R, 11L inside the leg portions 10R, 10L. The outer leg portions 10R and 10L are each formed with an opening portion 12, and the inner leg portions 11R and 11L are respectively formed with projecting portions 13 projecting outward corresponding to the opening portions 12. Has been. The front surface side cover member 10 and the back surface side cover member are formed by fitting the protrusions 13 of the legs 11R, 11L to the openings 12 of the legs 10R, 10L and locking the protrusions 13 to the edge of the opening 12. The fitting state of the 11 leg portions is prevented from coming off.

  Further, at both front and rear ends of the base surface portion 10ba of the front surface side cover member 10, a locking portion 14 that locks the core member 4a and regulates the position of the core member 4a in the front and rear direction with respect to the front surface side cover member 10. Is provided. Further, similarly, the back-side cover member 11 also has a core member 4b locked at both front and rear ends of the base surface portion 11ba to regulate the position of the core member 4b in the front-rear direction with respect to the back-side cover member 11. A locking portion 15 is provided.

  By the way, in order to improve the inductance characteristics of the coil device 1, it is desirable that the core member 4a and the tip surface of the core foot 5 of the core member 4b are in close contact with each other without any gap. However, the core members 4a and 4b are made of, for example, a magnetic material such as ferrite, and a contact surface (joint surface) where the core member 4a and the end surface of the core foot 5 of the core member 4b contact each other is rough. Surface. Further, dust or the like may enter between the core member 4a and the front end surface of the core foot 5 of the core member 4b. Due to the fact that the contact surfaces of the core members 4a and 4b are rough or that dust enters between the contact surfaces, the contact state (joined state) of the core members 4a and 4b is changed. In some cases, the magnetic flux passing through the core members 4a and 4b is adversely affected and the inductance value of the coil device 1 is lowered. In some cases, the coil device 1 may be defective.

  For this reason, after the pair of core members 4a and 4b are combined with the core combination member 7 and attached to the circuit board 2, the core members 4a and 4b are slid relative to each other in the front-rear direction, for example, An operation of rubbing the front end surface of the core foot 5 of the core member 4b may be performed. By this rubbing operation of the core, the core member 4a and the tip surface of the core foot 5 of the core member 4b can be polished together to improve the surface roughness, and the core member 4a and the core foot 5 of the core member 4b can be improved. The dust between the front end surfaces of the core member 4a and the front end surface of the core foot 5 of the core member 4b can be improved. Thereby, the inductance value of the coil apparatus 1 is improved and the yield deterioration of the coil apparatus 1 can be suppressed.

JP 2002-246236 A

  In the configuration shown in FIG. 8, the core combination member 7 has two parts, that is, the front surface side cover member 10 and the back surface side cover member 11. Further, when the design of the core members 4a and 4b is changed, the front surface side cover member 10 and the back surface side cover member 11 are manufactured so as to fit the changed core members 4a and 4b. And two new molds for producing the back-side cover member 11 must be prepared, which causes a problem that a large material cost and manufacturing cost of the mold are required.

  The present invention has been made to solve the above-mentioned problems, and its purpose is to improve the yield by enabling the core members to be rubbed together in a state where the pair of core members are held in combination by the core combination members. However, a coil device capable of reducing the material cost of the core combination member and the material cost and manufacturing cost of the mold for producing the core combination member, and a switching power supply module using the coil device It is to provide.

  In order to achieve the above object, the present invention has the following configuration as means for solving the above problems. That is, the coil device of the present invention includes a coil pattern formed on a circuit board, a pair of core members mounted on the coil pattern in a form in which at least a part of the coil pattern is sandwiched from both front and back sides of the circuit board, and a circuit board A core foot insertion through-hole for inserting a core foot provided in one side of the pair of core members provided in the coil pattern formation region of the pair of core members, and using the core foot insertion through-hole. A coil device having a core combination member that holds the core members in combination, wherein one side of the pair of core members held in combination by the core combination members has a core foot that is a core of the circuit board. The core member on the position restriction side is inserted into the through hole for foot insertion and the position in the front-rear direction is restricted, and the core member on the other side is a circuit. A core member on the displacement side that can be displaced in the front-rear direction along the board surface of the plate. The core combination member includes a base surface portion that applies a pressing force in the front and back direction of the circuit board to the pair of core members, A leg portion that is erected on the surface portion and is inserted into the core foot insertion through-hole along the core foot of the core member on the position regulating side, and a pressing force is applied from the base surface portion provided at the distal end portion of the leg portion. A claw portion that holds a pair of core members between the base surface portion by locking the core member and a locking portion for locking the core member on the displacement side at both front and rear positions. The leg portion of the member has a cut-out portion for escaping at a portion that contacts the inner wall surface of the through hole for inserting the core foot when displaced in the front-rear direction with respect to the circuit board. Displacement in the front-rear direction relative to the circuit board integrally with the core member of the It is characterized in that the member to the core member of the position regulating side is possible with the structures of the rubbing alignment of the contact portion between the position restricting side of the core member and the displacement side of the core member is slid moved.

  Further, the switching power supply module of the present invention is a switching power supply module including a circuit board on which a switching power supply circuit having a coil is formed, and the circuit board of the coil device having a characteristic configuration in the present invention includes: A switching power supply circuit in which a coil pattern of a coil device and a coil having a core member are incorporated is configured, and the circuit board of the coil device functions as a circuit board of a switching power supply module.

  According to this invention, the core combination member has a base surface portion, a leg portion standing on the base surface portion, and a claw portion provided on a tip portion of the leg portion, and the base surface portion and the claw portion A pair of core members are sandwiched between and held in combination. In other words, in the present invention, the core combination member is configured to hold a pair of core members in combination with a single component. For this reason, compared with the core combination member of the type which has two parts, a front surface side cover member and a back surface side cover member, the core combination member in this invention can reduce material cost only by one component. it can. In addition, since the core combination member according to the present invention has a simple structure and can hold the pair of core members in combination, the core combination member can be easily manufactured and the manufacturing cost can be reduced.

  Furthermore, in this invention, since only one type of mold for manufacturing the core combination member needs to be prepared, two types of core combination members having two parts, a front surface side cover member and a back surface side cover member, are used. Compared to the case where different types of molds must be prepared, the material cost and manufacturing cost of the molds can be reduced.

  As described above, in the configuration of the present invention, the cost associated with the core combination member can be reduced, so that the price of the coil device and the switching power supply module using the coil device can be reduced.

  Moreover, in this invention, since the cut-out part for escape is formed in the leg part of a core combination member, a leg part can move to the front-back direction inside the through-hole for core foot penetration. Further, since the core combination member is provided with a locking portion for locking the core member on the displacement side at both the front and rear positions, the core member on the displacement side is also the core when the core combination member is moved in the front-rear direction. It can be moved together with the combination member in the front-rear direction.

  That is, the core combination member and the displacement-side core member are integrally displaced in the front-rear direction with respect to the circuit board, and the displacement-side core member is slid and moved relative to the position-regulating core member. The contact portion between the member and the core member on the position regulating side can be rubbed. By the rubbing of the cores, it is possible to improve the adhesion of the contact portion between the core member on the position regulating side and the core member on the displacement side, and it is possible to suppress a decrease in the inductance value of the coil device. In other words, when the inductance value of the coil device is lower than the set inductance value range when the pair of core members are combined by the core combination member, in the configuration of the present invention, the combination is performed by the core combination member. The core members can be rubbed together in the state, and the inductance value of the coil device can be improved by rubbing the cores. Thereby, the inductance value defect of a coil apparatus can be eliminated and the yield of a coil apparatus can be improved.

  For those provided with a fixing means for fixing the displacement-side core member to the circuit board, for example, after the abutting portions of the displacement-side core member and the position-regulating side core member are rubbed together By fixing the displacement-side core member to the circuit board by the means, it is possible to prevent the displacement-side core member from deviating from a favorable arrangement position after the manufacture is completed. Thereby, the deterioration of the combined state of the displacement-side core member and the position-regulating side core member due to the displacement of the displacement-side core member is avoided, and the deterioration of the combined state of the core members causes the coil device The risk of changing characteristics can be prevented.

  Embodiments according to the present invention will be described below with reference to the drawings. In the description of this embodiment, the same components as those of the coil device shown in FIG. 8 are denoted by the same reference numerals, and duplicate descriptions of the common portions are omitted.

  The coil device of this embodiment is characterized by a core combination member, and the other configuration is the same as that of the coil device shown in FIG. That is, the coil device 1 according to this embodiment includes a circuit board 2, a coil pattern 3, a pair of core members 4 (4 a, 4 b) provided in the coil pattern 3, and a core foot insertion through hole 6. And a core combination member to be described later.

  In this embodiment, the coil pattern 3 is formed, for example, on both the front and back sides of the circuit board 2 with the central axis coaxial, and the coil pattern 3 on the front side and the coil pattern 3 on the back side of the circuit board 2 are a circuit. It is good also as a structure connected by the through hole formed in the board | substrate 2, and good also as a structure formed only in the surface of one side of the surface of the circuit board 2, and a back surface. Further, when the circuit board 2 is a multilayer board, not only the coil pattern 3 is formed on one or both of the front surface and the back surface of the circuit board 2 but also the coil pattern 3 is formed on the inner layer of the circuit board 2. The plurality of coil patterns 3 may be arranged with the central axis on the same axis, or one or more coil patterns 3 may be formed only on the inner layer of the circuit board 2. Good. As described above, the configuration of the coil pattern 3 is appropriately set according to specifications and the like. When a plurality of coil patterns 3 are formed, all the coil patterns 3 are not necessarily connected to form one coil. For example, a transformer primary coil is formed by at least one coil pattern 3. It is good also as a structure which comprises and comprises the secondary coil of a transformer with the remaining coil pattern 3. FIG.

In this embodiment, the length W ₅ in the front-rear direction of the core foot 5 of the E-shaped core member 4b (see FIG. 8) and the length W ₆ in the front-rear direction of the through-hole 6 for inserting the core foot are substantially the same. By inserting the core feet 5 (5a, 5b, 5c) of the core member 4b through the corresponding core foot insertion through holes 6 (6a, 6b, 6c) from the back side of the circuit board 2, The core member 4b is configured to be restricted in position in the front-rear direction. That is, the core member 4b is formed as a core member on the position regulating side. On the other hand, the I-shaped (flat plate) core member 4a is arranged on the surface of the circuit board 2 and is a displacement-side core member that can be displaced in the front-rear direction along the surface of the circuit board 2. Yes.

  FIG. 1 schematically shows a state of the coil device of this embodiment viewed from the front side, and FIG. 2 shows a core combination member characteristic of this embodiment with the core member. It is shown by a schematic perspective view. In this embodiment example, the core combination member 20 is formed by bending a metal plate, and the core combination member 20 is erected on the base surface portion 21 and both the left and right sides of the base surface portion 21. Leg portions 22 (22a, 22b), inward claw portions 23 (23a, 23b) provided at the respective distal ends of the leg portions 22a, 22b, and both front and rear sides of the base surface portion 21, respectively. It has the latching | locking part 24 which is comprised. In FIGS. 1 and 2, only the locking portion 24 provided on the front side of the base surface portion 21 is illustrated, and the locking portion provided on the rear side of the base surface portion 21 is at a position behind the core member 4a and the like. As it is arranged, it is not shown.

  The base surface portion 21 includes a core contact portion 21A that contacts the plate surface of the flat core member 4a, and spring portions 21sa and 21sb formed on the left and right sides of the core contact portion 21A. Thus, the pressing force in the direction toward the back surface of the circuit board 2 can be applied from the core abutting portion 21A to the core member 4a on the displacement side using the elastic force of the spring portions 21sa and 21sb.

  The leg portions 22 (22a, 22b) can be inserted into the core foot insertion through holes 6 (6a, 6c) along with the core feet 5 (5a, 5c (outer feet)) of the core member 4b on the position regulating side. It is configured. An inward claw portion 23 (23a, 23b) provided at the distal end portion of the leg portion 22 (22a, 22b) locks the core member 4b and is between the core contact portion 21A of the base surface portion 21. The pair of core members 4a and 4b can be sandwiched by utilizing the elastic force of the spring portions 21sa and 21sb.

  The locking portion 24 is constituted by a protruding piece formed to extend from both front and rear ends of the base surface portion 21 to a position facing the front end surface or the rear end surface of the core member 4a, and the front end surface or the rear surface of the core member 4a. The end surface is locked and the position of the core member 4a in the front-rear direction with respect to the core combination member 20 is restricted.

In this embodiment, the width in the front-rear direction of the base surface portion 21 of the core combination member 20 is substantially equal to the width in the front-rear direction of the core members 4a, 4b and the core foot insertion through hole 6. On the other hand, the leg portions 22 (22a, 22b) of the core combination member 20 are formed with cutout portions 25 for escape on both sides of the front side portion and the rear side portion. The width W _{22 in} the front-rear direction of the portion inserted through the core foot insertion through-hole 6 in ₂₂ is larger than the width W _{6 in} the front-rear direction of the core foot insertion through-hole 6 in the core foot insertion through-hole 6. The portion 22 is thin enough to allow displacement in the front-rear direction. For this reason, the core combination member 20 can move in the front-rear direction with respect to the circuit board 2 in a state where the leg portion 22 is inserted through the core foot insertion through hole 6.

  Since the coil device 1 according to this embodiment is configured to include the core combination member 20 having the above-described specific configuration, the pair of core members 4a and 4b are combined by the core combination member 20. The cores can be rubbed together as shown below.

  For example, after mounting the pair of core members 4 a and 4 b on the coil pattern 3 of the circuit board 2 using the core combination member 20, the core combination member 20 is gripped, for example, rearward along the board surface of the circuit board 2. Move. As the core combination member 20 moves, both the core members 4a and 4b tend to be displaced backward, but the core foot 5 of the E-type core member 4b is engaged with the inner wall surface of the core foot insertion through hole 6. Since the displacement of the core member 4b is prevented and the core member 4b is hardly displaced. On the other hand, the I-shaped core member 4a is regulated in the front-rear direction position with respect to the core combination member 20 by the engaging portions 24 on both front and rear sides of the core combination member 20, and the entire core member 4a is a circuit board. Since the core member 4 a is disposed on the second substrate surface, the core member 4 a is displaced rearward integrally with the core combination member 20. When the rear side portion of the leg portion 22 of the core combination member 20 comes into contact with the inner wall surface of the core foot insertion through hole 6, the displacement of the core combination member 20 stops. The state when the core combination member 20 and the core member 4a are displaced to the rearmost side is schematically shown in FIG.

  As described above, since the core member 4a has a larger amount of rearward displacement than the core member 4b, the contact surfaces of the core members 4a and 4b that contact each other are rubbed together.

  Next, when the core combination member 20 is displaced forward along the board surface of the circuit board 2 from the state of FIG. 3A, the position of the E-type core member 4b in the front-rear direction is substantially regulated. The I-shaped core member 4a is displaced in the forward direction integrally with the core combination member 20, and after passing through the state shown in FIG. 3 (b), as shown in FIG. 3 (c), the core combination member When the front side portion of the 20 leg portions 22 comes into contact with the inner wall surface of the core foot insertion through hole 6, the forward displacement of the core combination member 20 and the core member 4a is stopped. Also in this case, since the I-type core member 4a has a larger amount of displacement than the E-type core member 4b, the contact surfaces of the core members 4a and 4b that are in contact with each other are rubbed together.

  By repeating the back and forth displacement of the core combination member 20 as described above, the contact surfaces of the core members 4a and 4b are rubbed together, whereby the contact surfaces are polished. It is possible to improve the surface roughness and remove dust between the contact surfaces. For this reason, for example, when the pair of core members 4a and 4b is mounted on the coil pattern 3 of the circuit board 2 using the core combination member 20, the inductance value of the coil device 1 is too lower than the set inductance value range. In many cases, the inductance of the coil device 1 can be improved by rubbing the cores as described above, and the defect in the inductance value of the coil device 1 can often be eliminated, thereby improving the yield of the coil device 1. it can.

  Incidentally, the coil device 1 as a product is preferably in a state as shown in FIG. 3B (that is, a state in which the core members 4a and 4b are not displaced from each other). Therefore, for example, after the cores are rubbed together, the core member 4a may be fixed to the circuit board 2 by a fixing means. Examples of the fixing means include an adhesive and a resin material. Further, for example, a wedge-shaped member that is fitted in a gap between the core members 4a and 4b and the inner wall surface of the core foot insertion through-hole 6 to regulate the position of the core members 4a and 4b in the front-rear direction is provided as a fixing means. May be. As described above, there are various types of fixing means for fixing the I-type core member 4a (the core member on the displacement side) to the circuit board 2, and an appropriate configuration may be adopted. Note that, for example, if the core member 4a is slightly displaced and does not cause a serious problem, the fixing means as described above may be omitted.

  Below, an example of the switching power supply module using the coil apparatus 1 of this embodiment is demonstrated easily. The switching power supply module includes, for example, a circuit board on which a switching power supply circuit 30 as shown in FIG. 4 is configured. The switching power supply circuit 30 includes a transformer T. An input filter circuit 31 and a main switch Q are provided on the primary coil N1 side of the transformer T, and a control circuit 32 for performing switching control of the main switch Q. Is provided. A rectifying / smoothing circuit 33 is provided on the secondary coil N2 side of the transformer T. 4 indicates an input power supply that supplies power to the switching power supply circuit 30, and reference numeral 35 indicates a load to which power output from the switching power supply circuit 30 is supplied.

  In the switching power supply module of this embodiment, the circuit board 2 of the coil device 1 including the transformer (coil) having the coil pattern 3 and the core members 4a and 4b described above is used. On the substrate 2, electronic components and circuit patterns are formed, and a switching power supply circuit 30 in which the transformer of the coil device 1 is incorporated as the transformer T of the switching power supply circuit 30 is formed.

  In the switching power supply module of this embodiment, the coil device 1 having a characteristic configuration in this embodiment is used. Therefore, the cost of the coil device 1 can be reduced while suppressing the yield deterioration due to the coil device 1. Therefore, the price of the switching power supply module can be reduced.

  In addition, this invention is not limited to the form of the coil apparatus 1 of this embodiment, or the switching power supply module, but can take various embodiment. For example, in this embodiment, the core combination member 20 has a mode as shown in FIG. 2, for example. However, the core combination member 20 is not limited to the mode of FIG. The core combination member 20 in a form in which the spring portions 21sa and 21sb are swollen as compared with FIG. 2 may be used.

  Further, in this embodiment, the leg portion 22 of the core combination member 20 has a leg portion extending from the leg portion that contacts the inner wall surface of the core foot insertion through hole 6 when the core combination member 20 is displaced in the front-rear direction. The cut-out portion 25 for escaping is formed on the tip of the head portion. However, for example, as shown in the side view of FIG. 6, when the core combination member 20 is displaced in the front-rear direction, the core foot insertion penetration It is good also as a structure which forms the cut-out part 25 for escape only in the leg part contact | abutted to the inner wall face of the hole 6. FIG. As described above, the shape of the escape cutout 25 is not limited to the shape shown in FIG.

  Furthermore, in this embodiment, the core member 4a is an I-type core member, and the core member 4b is an E-type core member. However, the pair of core members 4a and 4b are such an I-type core member. The core member is not limited to the combination of the core member and the E-shaped core member. For example, a pair of core members 4a and 4b as shown in FIGS. 7A to 7D may be used. 7A to 7D, one side 4a of the pair of core members 4 is an I-type core member, and the core member 4a functions as a displacement-side core member. The other core member 4b is an EER type core member in the example of FIG. 7A, a UR type core member in the example of FIG. 7B, and in the example of FIG. 7C. It is a pot core-shaped core member, which is a U-shaped core member in the example of FIG. These core members 4b function as core members on the position regulating side.

  Further, as the configuration example of the switching power supply circuit provided in the switching power supply module, the circuit example of FIG. 4 is given. However, the switching power supply circuit provided in the switching power supply module of this embodiment can use the coil device 1. If it is a configuration, the circuit configuration is not limited to the configuration of FIG.

It is a figure for demonstrating one embodiment of the coil apparatus which concerns on this invention. It is the perspective view which extracted typically the core combination member which comprises the coil apparatus of FIG. 1, with the core member, and showed typically. It is a figure for demonstrating the core rubbing operation | work in the coil apparatus shown in FIG. It is a circuit diagram which shows one structural example of a switching power supply circuit. It is the model figure which showed the other example of a form of the core combination member. It is a figure for demonstrating the other example of a shape of the excision part for escape provided in the leg part of a core combination member. It is a model figure for demonstrating the other example of a core member. It is a figure for demonstrating the coil apparatus of patent document 1. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Coil apparatus 2 Circuit board 3 Coil pattern 4 Core member 6 Core hole insertion through-hole 20 Core combination member 21 Base surface part 22 Leg part 23 Claw part 24 Locking part 25 Relief cutting part

Claims (4)

  A coil pattern formed on the circuit board, a pair of core members mounted on the coil pattern in a form in which at least a part of the coil pattern is sandwiched from both the front and back sides of the circuit board, and the coil pattern forming region of the circuit board A core foot insertion through hole for inserting a core foot provided on one side of the pair of core members, and a core combination for holding the pair of core members in combination using the core foot insertion through hole A coil device having a member, wherein one of the pair of core members held in combination by the core combination member is inserted into the core foot insertion through-hole of the circuit board. This is a position-regulating core member whose position in the front-rear direction is restricted, and the other core member is displaced in the front-rear direction along the board surface of the circuit board. The core combination member includes a base surface portion that applies a pressing force in the front and back direction of the circuit board to the pair of core members, and a core member on the position regulation side that is erected on the base surface portion. A leg portion that is inserted into the core foot insertion through hole and a core member that is provided at a distal end portion of the leg portion and is pressed by a base surface portion to engage the base surface portion. A claw portion for sandwiching a pair of core members between them, and a locking portion for locking the core member on the displacement side at both front and rear positions, and the leg portion of the core combination member on the circuit board A relief cutout is formed at the part that contacts the inner wall surface of the core foot insertion through-hole when displaced in the front-rear direction, and the core combination member is integrated with the displacement-side core member integrally with the circuit board. Displace the core member on the displacement side with respect to the core member on the position restriction side. Coil means characterized in that it is in the configuration of the rubbing alignment of the contact portion between the position restricting side of the core member and the displacement side of the core member is slid moved.   2. The coil device according to claim 1, wherein the core member on the displacement side has a flat plate shape.   The coil device according to claim 1 or 2, wherein a fixing means for fixing the core member on the displacement side to the circuit board is provided.   A switching power supply module comprising a circuit board on which a switching power supply circuit having a coil is formed, wherein the circuit board constituting the coil device according to claim 1, wherein the coil of the coil device is included. A switching power supply module comprising a switching power supply circuit in which a coil having a pattern and a core member is incorporated, and a circuit board of the coil device functions as a circuit board of the switching power supply module.

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