JP2014057044A - Electric apparatus including substrate and manufacturing method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric apparatus including a substrate on which a transformer can be built easily, and to provide a manufacturing method therefor.SOLUTION: An electric apparatus 1 including a substrate includes a magnetic material 2, one or a plurality of coils 3 provided on the outside of the magnetic material 2, and a substrate 4 for supporting the magnetic material 2. At least one of the coils 3 consists of a plurality of conductive members 31 arranged on the outside of the magnetic material 2, and a conductive pattern 32 formed on the substrate 4 connecting the adjoining conductive members 31 electrically. The magnetic material 2 may be supported via a pedestal.

Description

  The present invention relates to an electric device including a substrate on which an electric component in which a coil is provided outside a magnetic body is mounted, and a method for manufacturing the electric device.

  For example, as described in Patent Document 1 below, an electrical component in which a coil is provided on the outside of a magnetic material is known (hereinafter, this type of electrical component is generally referred to as a “transformer”. In other words, in this specification, all electrical components having a coil provided outside the magnetic material are referred to as “transformers”).

JP 2003-309033 A

  A small-sized transformer mounted on a substrate is also known. Since such a transformer for mounting on a board is small, it is difficult to form a coil by winding a conducting wire around the outside of the magnetic material, and there is a problem that the manufacturing cost increases.

  In view of the above circumstances, the problem to be solved by the present invention is to provide an electric device including a substrate on which a transformer can be easily constructed on the substrate, and a manufacturing method thereof.

  In order to solve the above-described problems, an electric device including a substrate according to the present invention includes a magnetic body, one or a plurality of coils provided outside the magnetic body, and a substrate that supports the magnetic body. At least one of the coils is constituted by a plurality of conductive members arranged outside the magnetic body and a conductive pattern formed on the substrate that electrically connects adjacent conductive members. This is the gist.

  In addition, the apparatus further includes a pedestal on which the magnetic body is placed, which is fixed to the substrate with a predetermined distance from the surface of the substrate, and the conductive member and the conductive pattern are electrically connected to the substrate. A plurality of lands for connection are formed, and a guide hole, which is a through hole through which the conductive member passes, is formed in the pedestal at a position overlapping the land.

  The pedestal only needs to be formed with a guide portion that is in close contact with at least a part of the outer surface of the magnetic body.

  Moreover, the guide part in the said pedestal should just be formed with the through-hole or groove | channel which the said electroconductive member passes in the position which overlaps with the said land.

  In addition, a conductive member set in which the plurality of conductive members are fixed to a base material made of an insulating material in which a space opened on one side is formed, and the conductive member set is disposed in the space. What is necessary is just to be supported by the said board | substrate so that a magnetic body may be located.

  The magnetic body is formed in a circular shape, the plurality of conductive members are formed in the same shape, and the substrate has a plurality of lands for electrically connecting the conductive member and the conductive pattern. Are formed on the inner side and the outer side of the magnetic body, respectively, and the distance from the center of the magnetic body to a land on each of the inner side and the outer side of the magnetic body is different from the center of the magnetic body on a different land. It may be set differently from the distance.

  Further, the substrate is formed such that a plurality of conductive patterns having one end positioned on one side of the magnetic body and the other end positioned on the other side of the magnetic body are arranged along the magnetic body. Each of the plurality of conductive members has one end connected to one end of a certain conductive pattern of the plurality of conductive patterns and the other end connected to the other end of the conductive pattern adjacent to the certain conductive pattern. Good.

  On the other hand, the substrate is formed such that a plurality of conductive patterns having one end located on one side of the magnetic body and the other end located on the other side of the magnetic body are arranged along the magnetic body. At least one of the plurality of conductive members is connected to one end of a certain conductive pattern of the plurality of conductive patterns and the other end is not a conductive pattern adjacent to the certain conductive pattern. It may be connected to the other end of the conductive pattern.

  In order to solve the above-described problems, a method of manufacturing an electrical device including a substrate according to the present invention includes a conductive pattern forming step of forming a conductive pattern including a plurality of lands on the substrate, and a magnetic material that supports the magnetic material on the substrate. A supporting step, a conductive member arranging step of arranging a plurality of conductive members such that the magnetic body is located inside and the end portion is close to the land after the magnetic body supporting step, and the conductive member After the placing step, the conductive member forming the coil surrounding the magnetic body by the conductive member and the conductive pattern electrically connected thereto is electrically connected to the corresponding land by the end of each conductive member. And a sex member connecting step.

  The magnetic material supporting step includes a step of fixing a pedestal to the substrate at a predetermined interval from the surface of the substrate, and placing the magnetic material on the pedestal to place the substrate through the pedestal. Supporting the magnetic body in the conductive member disposing step, by passing the conductive member through a guide hole which is a through hole formed at a position overlapping the land in the pedestal, What is necessary is just to arrange | position a conductive member in a predetermined position.

  The magnetic body supporting step includes a procedure of fixing a pedestal to the substrate at a predetermined interval from the surface of the substrate, and a guide portion formed on the pedestal so as to be in close contact with at least a part of the outer surface of the magnetic body. Supporting the magnetic body on the substrate via the pedestal, and in the conductive member disposing step, in the through hole or groove formed in the guide portion at a position overlapping the land, The conductive member may be disposed at a predetermined position by passing the conductive member.

  Moreover, in order to solve the said subject, another manufacturing method of the electric equipment provided with the board | substrate concerning this invention is the space | gap which one side opened, and the conductive pattern formation process which forms the conductive pattern containing a some land on a board | substrate A conductive member set creating step for obtaining a conductive member set by fixing a plurality of conductive members to a base material made of an insulating material formed with a magnetic material supporting step for supporting a magnetic body on a substrate; After this magnetic body supporting step, the conductive member group is supported by the substrate so that the magnetic body is positioned in the space, and the magnetic body is positioned inside the conductive member. After the arranging step and the conductive member group arranging step, the end portions of the respective conductive members are electrically connected to the corresponding lands, so that the conductive members and the conductive patterns electrically connected thereto are used to And the conductive member connected to form a coil surrounding sexual body, and summarized in that comprises a.

  The conductive pattern forming step includes a plurality of conductive patterns on the substrate such that a land on one end side is positioned on one side of the magnetic body and a land on the other end side is positioned on the other side of the magnetic body. Are arranged so as to be arranged along the magnetic body, and the conductive member connecting step is configured to connect one end of each of the plurality of conductive members to one end side of a conductive pattern of the plurality of conductive patterns. It is good to be a step of connecting to the land and connecting the other end to the land on the other end side of the conductive pattern adjacent to the certain conductive pattern.

  On the other hand, the conductive pattern forming step includes a plurality of conductive patterns on the substrate such that a land on one end side is positioned on one side of the magnetic body and a land on the other end side is positioned on the other side of the magnetic body. Are formed so as to be arranged along the magnetic body, and the conductive member connecting step includes at least one end of the plurality of conductive members of a conductive pattern of the plurality of conductive patterns. It is preferable to include a procedure of connecting to a land on one end side and connecting the other end to a land on the other end side of another conductive pattern that is not a conductive pattern adjacent to the certain conductive pattern.

  In the electric device including the substrate according to the present invention, a coil is constructed by a plurality of conductive members arranged on the outside of the magnetic body and a conductive pattern formed on the substrate. That is, a coil can be formed around the magnetic body by arranging a plurality of conductive members at predetermined positions and electrically connecting the conductive members to the conductive pattern (for example, soldering). Thus, it is not necessary to wind a conducting wire around the outside of the magnetic body as in the prior art, and the manufacture is easy.

  Moreover, if a pedestal on which a magnetic material is placed and a guide hole that overlaps with the land is formed on the pedestal, the conductive member is placed in a predetermined position by inserting the conductive member into the guide hole. Specifically, since a part of the conductive member can be brought close to the land, manufacturing is easy. Furthermore, elements and conductive patterns mounted on the substrate surface can be protected by the pedestal.

  Further, if a pedestal on which a magnetic body is placed and a guide portion that is in close contact with at least a part of the outer surface of the magnetic body is formed on the pedestal, the magnetic body can be easily positioned at a predetermined position on the pedestal. .

  Further, a through hole or a groove through which the conductive member passes can be formed in the guide portion. That is, the guide portion can be used not only as an element for positioning the magnetic body but also as an element for positioning the conductive member.

  In addition, a conductive member set in which a conductive member is fixed to a base material made of an insulating material is prepared in advance, and a magnetic body is positioned in a space formed in the conductive member set (base material). A conductive member can also be disposed outside the magnetic body. In this way, assembly is easy.

  In addition, when the magnetic body is formed in a circle and the plurality of conductive members are formed in the same shape, the plurality of conductive members are usually arranged so as to be arranged in a circle. If the size of the magnetic body to be formed is small, there is a possibility that a space for arranging the land cannot be secured inside the magnetic body (inside the circle). In such a case, if the distance from the center of the magnetic body of a certain land is set to be different from the distance from the center of the magnetic body of a different land in each of the inside and the outside of the magnetic body (the same If the land is not positioned on the circle), the land can be arranged even when the space inside the magnetic body is small.

  In addition, if one end of each of the plurality of conductive members is connected to one end of a certain conductive pattern among the plurality of conductive patterns and the other end is connected to the other end of the conductive pattern adjacent to the certain conductive pattern, Since the conductive pattern constitutes the coil, the number of turns of the coil increases. On the other hand, one end of at least one of the plurality of conductive members is connected to one end of a certain conductive pattern of the plurality of conductive patterns, and the other end is not a conductive pattern adjacent to the certain conductive pattern. If connected to the other end, a part of the conductive pattern does not contribute to the construction of the coil, so that the number of turns of the coil is reduced (as compared to the case where all the conductive patterns constitute the coil). That is, the number of turns of the coil can be changed only by changing the shape of some of the conductive members.

  In addition, according to the manufacturing method of the present invention, an electrical device including a substrate in which a coil of a transformer includes a plurality of conductive members disposed on the outside of the magnetic body and a conductive pattern formed on the substrate is obtained. . That is, a coil can be formed around the magnetic body by arranging a plurality of conductive members at predetermined positions and electrically connecting the conductive members to the conductive pattern (for example, soldering). Thus, it is not necessary to wind a conducting wire around the outside of the magnetic body as in the prior art, and the manufacture is easy.

  Moreover, if a pedestal on which a magnetic material is placed and a guide hole that overlaps with the land is formed on the pedestal, the conductive member is placed in a predetermined position by inserting the conductive member into the guide hole. Specifically, since the end portion of the conductive member can be brought close to the land, manufacturing is easy.

  Moreover, if a guide part is formed in a base, it will become easy to position a magnetic body in the predetermined position on a base. Furthermore, a through hole or a groove through which the conductive member passes can be formed in such a guide portion. That is, the guide portion can be used not only as an element for positioning the magnetic body but also as an element for positioning the conductive member, which facilitates manufacture.

  Moreover, like another manufacturing method according to the present invention, a conductive member set in which a conductive member is fixed to a base material made of an insulating material is prepared in advance, and the conductive member set (base material) By positioning the magnetic body in the formed space, the conductive member can be disposed outside the magnetic body. In this way, assembly is easy.

  In addition, if one end of each of the plurality of conductive members is connected to one end of a certain conductive pattern among the plurality of conductive patterns and the other end is connected to the other end of the conductive pattern adjacent to the certain conductive pattern, Since the conductive pattern constitutes the coil, the number of turns of the coil increases. On the other hand, one end of at least one of the plurality of conductive members is connected to one end of a certain conductive pattern of the plurality of conductive patterns, and the other end is not a conductive pattern adjacent to the certain conductive pattern. If connected to the other end, a part of the conductive pattern does not contribute to the construction of the coil, so that the number of turns of the coil is reduced (as compared to the case where all the conductive patterns constitute the coil). In other words, the number of turns of the coil can be changed without greatly changing the manufacturing process (by simply changing the shape of some of the conductive members).

Fig.1 (a) is a top view of an electric equipment provided with the board | substrate concerning one Embodiment of this invention, FIG.1 (b) is the sectional view on the AA line shown to Fig.1 (a). It is a figure for demonstrating that the electric equipment provided with the board | substrate concerning one Embodiment of this invention can change the winding number of a coil, and Fig.2 (a) is the whole of the formed conductive pattern. 2B shows a configuration in which a coil is constructed, FIG. 2B shows a configuration in which one of the formed conductive patterns does not construct a coil (a configuration with one fewer turns than in FIG. 2A), and FIG. 2C shows a configuration. 2 shows a configuration in which two of the conductive patterns formed do not form a coil (a configuration in which the number of turns is two fewer than in FIG. 2A). Fig.3 (a) is a top view of an electric equipment provided with the board | substrate concerning a 1st modification, FIG.3 (b) is the BB sectional drawing shown to Fig.3 (a). FIG. 4A is a plan view of an electric device (having a through hole formed in the guide portion) including the substrate according to the second modification, and FIG. 4B is shown in FIG. It is CC sectional view taken on the line. FIG. 5A is a plan view of an electric device (having a groove formed in the guide portion) including the substrate according to the second modified example, and FIG. 5B is a diagram illustrating D shown in FIG. FIG. It is a top view of an electric equipment provided with the board | substrate concerning a 3rd modification, FIG. 6 (a) is the thing which does not use the base, FIG.6 (b) is the figure which showed the thing using the base. It is sectional drawing of an electric equipment provided with the board | substrate concerning a 4th modification.

  Hereinafter, embodiments of the present invention will be described. In the following description, the vertical direction (height direction) refers to the vertical direction in each sectional view, and the plane (horizontal) direction refers to the horizontal direction in each sectional view. In each figure, components such as elements mounted on the substrate are omitted except those related to the present invention.

  An electric apparatus 1 (hereinafter also simply referred to as an electric apparatus) including a substrate according to an embodiment of the present invention illustrated in FIG. 1 includes a magnetic body 2, a coil 3 provided on the outside thereof, and a substrate 4. Specifically, a well-known transformer is constructed in a state where it is supported on the substrate 4 by the magnetic body 2 and the coil 3 provided outside thereof.

  The magnetic body 2 is formed by forming a magnetic material (for example, ferrite) into a circular shape (annular shape). As shown in FIG.1 (b), the cross section of the magnetic body 2 cut | disconnected by the plane along radial direction is a rectangular shape. The magnetic body 2 is placed on the surface (upper surface) of the substrate 4.

  The coil 3 is composed of a conductive member 31 and a conductive pattern 32 formed on the substrate 4. In this embodiment, both the primary side coil and the secondary side coil of the transformer are constructed as follows. The conductive member 31 is a member in which a wire made of a conductive material is formed in a substantially “U” shape (substantially “U” shape). Specifically, it is a member composed of two wires extending in the vertical direction and a wire extending in the horizontal direction connecting the two wires. The space inside the conductive member 31 is formed in such a size that the magnetic body 2 can be inserted. Specifically, the length between the two wires extending in the vertical direction, that is, the length of the wire extending in the horizontal direction is slightly larger than the length in the radial direction of the magnetic body 2.

  An end portion of the conductive member 31 is passed through a positioning hole 42 which is a through hole formed in the substrate 4. The positioning holes 42 are formed by the number of the conductive members 31 on the outer side and the inner side of the circular magnetic body 2. Specifically, when the positioning holes 42 formed on the outer side of the magnetic body 2 and the positioning holes 42 positioned on the radial inner side of the positioning holes 42 are taken as one set, the number of the positioning holes 42 sets is the conductive member. It matches the number of 31. One conductive member 31 is passed through one of the positioning hole 42 sets having one end, and the other end is passed through the other of the positioning hole 42 sets.

  A land 41 is formed around the positioning hole 42 on the back surface (lower surface) of the substrate 4. That is, lands 41 are formed on the outside and inside of the magnetic body 2. Each land 41 is electrically connected by a conductive pattern 32 formed on the back surface of the substrate 4. Specifically, when a set of lands 41 formed on the outer side of the magnetic body 2 and lands 41 positioned on the radial inner side of the land 41 is formed as a set, the land 41 is formed on the outer side of the magnetic body 2 constituting the certain 41 land set. The land 41 is electrically connected to a land 41 formed on the inner side of the magnetic body 2 constituting another land 41 set adjacent to one of the land 41 sets. Therefore, when the end portions of the conductive members 31 are connected to the corresponding lands 41 by soldering or the like, the conductive members 31 are connected in series by the conductive patterns 32. That is, one coil 3 is formed outside the magnetic body 2 by one conductive member 31 and one conductive pattern 32 (including the land 41). That is, on the outside of the magnetic body 2, the coil 3 having the number of windings corresponding to the number of the conductive members 31 to be used is formed by the plurality of conductive members 31 and the conductive pattern 32 connecting them. In the present embodiment, the end portion of the coil 3 formed in this way is directly connected to a circuit formed on the substrate 4.

  In the above configuration, the magnetic body 2 and the conductive member 31 are insulated. Such an insulating state is ensured by covering at least one of the magnetic body 2 and the conductive member 31 with an insulating material. In the present embodiment, the magnetic body 2 is placed on the surface of the substrate 4, the conductive member 31 is electrically connected, and the conductive pattern 32 constituting a part of the coil 3 is formed on the back surface of the substrate 4. Therefore, the insulating state between the magnetic body 2 and the conductive pattern 32 is ensured by the substrate 4 (an insulating material constituting the base of the substrate 4).

  The manufacturing process of the electrical device 1 having such a configuration (the manufacturing method of the electrical device including the substrate according to the embodiment of the present invention) is as follows. First, 1) a conductive pattern 32 including a plurality of lands 41 is formed on a substrate 4 (conductive pattern forming step). The conductive pattern 32 may be formed together with other patterns such as a pattern for electrically connecting elements mounted on the substrate 4 together with the conductive pattern 32 forming the coil 3. 2) The magnetic body 2 is supported on the substrate 4 (magnetic body supporting step). That is, the magnetic body 2 is placed at a predetermined position on the surface of the substrate 4. It is preferable to provide positioning and marks on the substrate 4 so that the magnetic body 2 can be easily placed at a predetermined position. Subsequently, 3) the plurality of conductive members 31 are arranged so that the magnetic body 2 is located inside and the end portion is close to the land 41 (conductive member arranging step). That is, the end of the conductive member 31 is passed through the positioning hole 42 formed in the substrate 4. Finally, 4) by electrically connecting the end portions of the respective conductive members 31 to the corresponding lands 41 (for example, soldering), the conductive members 31 and the conductive patterns 32 electrically connected thereto are used. The coil 3 surrounding the magnetic body 2 is formed (conductive member connecting step). Through the above steps, the coil 3 wound around the magnetic body 2 having a rectangular cross section is formed.

  According to the electrical apparatus 1 according to the present embodiment having such a configuration, the coil 3 of the transformer is constructed by the plurality of conductive members 31 arranged on the outside of the magnetic body 2 and the conductive pattern 32 formed on the substrate 4. Is done. That is, the coil 3 is formed around the magnetic body 2 by arranging a plurality of conductive members 31 at predetermined positions and electrically connecting the conductive members 31 to the conductive pattern 32 (for example, soldering). Therefore, it is not necessary to wind a conducting wire around the outside of the magnetic body 2 as in the prior art, and manufacturing is easy.

  In the above embodiment, the positioning hole 42 is formed in the substrate 4 and the conductive member 31 is connected to the land 41 on the back surface of the substrate 4. However, such a positioning hole 42 is not formed, A conductive pattern 32 constituting the land 41 and the coil 3 may be formed on the surface of the substrate 4, and the conductive member 31 and the land 41 may be connected (for example, soldered) on the surface of the substrate 4.

  As described above, in the electric device 1 according to the present embodiment, the coil 3 of the transformer is constructed by the conductive member 31 disposed outside the magnetic body and the conductive pattern 32 of the substrate 4. In the present embodiment, the number of turns of the coil 3 of the transformer can be changed as follows.

  The conductive pattern 32 has one end (land 41 on one end) positioned on the outside (one side) of the magnetic body and the other end (land 41 on the other end) positioned on the inside (other side) of the magnetic body. Thus, a plurality of magnetic bodies are formed on the substrate 4 along the longitudinal direction thereof. That is, the plurality of conductive patterns 32 are formed so as to straddle the magnetic body in the width direction.

  In the case where a predetermined number of conductive patterns 32 are formed on the substrate 4, in order to maximize the number of turns of the coil 3, one end of each conductive member 31 is formed of one of the plurality of conductive patterns 32. It is preferable to connect to one end and connect the other end to the other end of the conductive pattern 32 adjacent to the certain conductive pattern 32. That is, each conductive member 31 is preferably installed so as to bridge one end of a certain conductive pattern 32 and the other end of the conductive pattern 32 adjacent thereto. In this way, the number of turns of the coil 3 is the same as the number of the plurality of conductive patterns 32 formed on the substrate 4. That is, the maximum value of the number of turns of the coil 3 is the same as the number of the conductive patterns 32. In the example shown in FIG. 2A, a six-turn coil 3 is constructed by forming six conductive patterns 32.

  When the number of turns of the coil 3 is reduced, at least one end of the plurality of conductive members 31 is connected to one end of a certain conductive pattern 32 of the plurality of conductive patterns 32 and the other end is connected to the certain conductive pattern. The conductive pattern 32 is not connected to the other end of another conductive pattern 32 that is not adjacent to the conductive pattern 32 ′. That is, there is at least one conductive member 31 that bridges one end of one conductive pattern 32 and the other conductive pattern 32 that is not the adjacent conductive pattern 32 (by skipping at least the adjacent conductive pattern 32 ′). What is necessary is just to be the structure provided.

  For example, as shown in FIG. 2B, when six conductive patterns 32 are formed on the substrate 4, one conductive member (conductive member 31 ′) among the plurality of conductive members 31 is formed. ) Is connected to one end of a conductive pattern 32, and the other end is connected to the other end of another conductive pattern 32 adjacent to the conductive pattern 32 'adjacent to the certain conductive pattern 32. One skipped conductive pattern 32 ′ does not constitute the coil 3, and the number of turns of the coil 3 can be reduced by one (a coil 3 having five turns) can be obtained. That is, the number of turns of the coil 3 can be reduced by one by simply changing the shape of one conductive member 31 ′ among the plurality of conductive members 31.

  Similarly, as shown in FIG. 2C, when six conductive patterns 32 are formed on the substrate 4, one end of the two conductive members 31 ′ is connected to one end of the conductive pattern 32. At the same time, when the conductive pattern 32 'adjacent to the certain conductive pattern 32 is skipped and connected to the other end of another adjacent conductive pattern 32, the two skipped conductive patterns 32' connect the coil 3 to the other conductive pattern 32 '. It becomes the structure which is not constructed | assembled, and can reduce the number of turns of the coil 3 by 2 (it can be set as the coil 3 of 5 turns).

  As described above, the electrical apparatus 1 according to the present embodiment skips at least one of the plurality of conductive patterns 32 formed on the substrate 4 and is adjacent to one of the conductive patterns 32 ′. When the conductive member 31 'is connected to one end of the conductive pattern 32 and the other end of the conductive pattern 32 adjacent to the other, all the conductive patterns 32 constitute the coil 3 (in the case shown in FIG. 2A) ), The number of turns of the coil 3 can be reduced.

  Therefore, for example, when it is necessary to change the number of turns of the coil 3 in order to match the electrical characteristics (impedance, etc.) with the peripheral circuit, it is required by changing the shape of some of the conductive members 31 as described above. If it is possible to set the number of turns of the coil 3 to be changed, it is not necessary to change the configuration (shape, etc.) of the entire electric device 1. In other words, a part of the shape of the conductive member 31 (manufacturing is simple and inexpensive) in which a wire made of a conductive material is formed in a substantially “U” shape (substantially “U” shape). Since various electrical devices 1 with different numbers of turns of the coil 3 can be created simply by changing the number of components, this contributes to cost reduction by increasing the number of common components and simplifying component management.

  2B and 2C, a part of the conductive member 31 'skips one conductive pattern 32' and is connected to the adjacent conductive pattern 32 of the conductive pattern 32 '. However, a configuration in which two or more conductive patterns are skipped (a configuration in which two or more adjacent conductive patterns do not contribute to the construction of the coil 3) may be employed.

  Hereinafter, a modified example of the electrical device 1 according to the above-described embodiment (a modified example of the electrical device manufacturing method) will be described. Note that the following description of the modified example will focus on differences from the above embodiment.

  The electric apparatus 1a according to the first modification shown in FIG. 3 is provided with a base 5 on which the magnetic body 2 is placed. That is, the magnetic body 2 is supported by the substrate 4 via the base 5. The pedestal 5 is fixed to the substrate 4 at a distance from the surface of the substrate 4 by a foot member 51 fixed so as to protrude downward from the end thereof. When there is a mounting component 43 such as an element or a conductive pattern mounted on the surface of the substrate 4, the interval is set to a size that does not interfere with the mounting component 43.

  A guide hole 52 that is a through hole is formed in the base 5 at a position that overlaps each of the plurality of lands 41 formed in the substrate 4 in the vertical direction. More specifically, each of the plurality of positioning holes 42 formed at the center of the land 41 is formed at a position overlapping in the vertical direction. A portion extending in the vertical direction of the conductive member 31 is passed through the guide hole 52. Since the guide hole 52 and the positioning hole 42 overlap each other in the vertical direction, the portion that passes in the vertical direction of the conductive member 31 passes through the guide hole 52 as described above, and the portion passes through the positioning hole 42 as it is. That is, the end of the conductive member 31 is in the state of being close to each land 41. Thus, the guide hole 52 formed in the base 5 functions as a guide element for bringing the end of the conductive member 31 close to the land 41.

  The guide hole 52 formed in the pedestal 5 gradually tapers toward the opening on the side where the conductive member 31 is inserted (on the side where the magnetic body 2 is placed, that is, upward in this example). A portion 521 may be formed. In this way, it is easy to insert the end portion of the conductive member 31 into the guide hole 52.

  The manufacturing process (electric device manufacturing method) of the electric device 1a according to the present modification having such a configuration is as follows. First, 1) a conductive pattern 32 including a plurality of lands 41 is formed on a substrate 4 (conductive pattern forming step). 2) A pedestal 5 is fixed to the substrate 4 with a predetermined distance from the surface of the substrate 4, and the magnetic body 2 is placed on the pedestal 5, whereby the substrate 4 is magnetized via the pedestal 5. The body 2 is supported (magnetic body supporting step). It is preferable to provide positioning and marks on the base 5 so that the magnetic body 2 can be easily placed at a predetermined position. Subsequently, 3) the plurality of conductive members 31 are arranged so that the magnetic body 2 is located inside and the end portion is close to the land 41 (conductive member arranging step). That is, by passing the end portion of the conductive member 31 through the guide hole 52 formed in the pedestal 5, the conductive member 31 is passed through the positioning hole 42 formed in the substrate 4 as it is. If the tapered portion 521 is formed in the guide hole 52, the operation of inserting the end portion of the conductive member 31 is easy. Finally, 4) by electrically connecting the end portions of the respective conductive members 31 to the corresponding lands 41 (for example, soldering), the conductive members 31 and the conductive patterns 32 electrically connected thereto are used. The coil 3 surrounding the magnetic body 2 is formed (conductive member connecting step). Through the above steps, the coil 3 wound around the magnetic body 2 having a rectangular cross section is formed.

  Thus, according to the electric apparatus 1a according to the present modification, the pedestal 5 on which the magnetic body 2 is placed is used, and the guide hole 52 that overlaps the land 41 (positioning hole 42) is formed in the pedestal 5. Therefore, by inserting the conductive member 31 into the guide hole 52, the conductive member 31 can be disposed at a predetermined position, specifically, the end of the conductive member 31 can be brought close to the land 41. Easy to manufacture. Furthermore, the pedestal 5 can protect the elements and conductive patterns (mounting parts 43) mounted on the surface of the substrate 4. Further, since the conductive member 31 and the land 41 are connected (for example, soldered) on the back side (lower side) of the substrate 4, the pedestal 5 does not interfere with the connection work (connection process).

  The electric devices 1b and 1c according to the second modified example shown in FIGS. 4 and 5 are magnetic bodies fixed to the substrate 4 with a predetermined distance from the surface of the substrate 4 as in the first modified example. 2 is provided with a pedestal 5 on which a guide portion 53 is formed.

  The guide part 53 is a protrusion protruding upward from the surface (upper surface) of the base 5. In the configuration shown in FIGS. 4 and 5, a guide portion 53 including a relatively small annular protrusion 531 and a relatively large annular protrusion 532 is formed. A space between the relatively small annular protrusion 531 and the relatively large annular protrusion 532 is formed in a size that allows the magnetic body 2 to be inserted. That is, the radial size between the relatively small annular projection 531 and the relatively large annular projection 532 is slightly larger than the radial size of the magnetic body 2. The magnetic body 2 is placed on the pedestal 5 while being positioned by both annular projections. That is, the outer surface of the magnetic body 2 is in close contact with the guide portion 53.

  In the guide portion 53, a through hole 533 (see FIG. 4) groove 534 (see FIG. 5) is formed at a position overlapping the guide hole 52 formed in the base 5 and the land 41 formed in the substrate 4 in the vertical direction. Has been. Since the positioning hole 42 is formed at the center of the land 41, the through hole 533 and the groove 534 overlap the positioning hole 42 in the vertical direction. A portion extending in the vertical direction of the conductive member 31 is passed through the through hole 533 and the groove 534. In this way, when a portion extending in the vertical direction of the conductive member 31 is passed through the through hole 533 and the groove 534, the end of the conductive member 31 passes through the guide hole 52 of the base 5 and the positioning hole 42 of the substrate 4. Protrusively on the back side. That is, the end portion of the conductive member 31 is located at a position close to the land 41. The protruding portion is connected to the land 41 (for example, soldered), whereby the coil 3 is constructed by the conductive member 31 and the conductive pattern 32.

  The manufacturing process (electric device manufacturing method) of the electric devices 1b and 1c according to the present modification having such a configuration is as follows. First, 1) a conductive pattern 32 including a plurality of lands 41 is formed on a substrate 4 (conductive pattern forming step). 2) The pedestal 5 is fixed to the substrate 4 with a predetermined distance from the surface of the substrate 4, and the magnetic body 2 is inserted into the guide portion 53 formed on the pedestal 5, whereby the pedestal is inserted. The magnetic body 2 is supported on the substrate 4 through 5 (magnetic body supporting step). Subsequently, 3) the end portion of the conductive member 31 is passed through the guide hole 52 of the base 5 and the positioning hole 42 of the substrate 4 through the through hole 533 or the groove 534 formed in the guide portion 53 (conductive member arranging step). . Finally, 4) by electrically connecting the end portions of the respective conductive members 31 to the corresponding lands 41 (for example, soldering), the conductive members 31 and the conductive patterns 32 electrically connected thereto are used. The coil 3 surrounding the magnetic body 2 is formed (conductive member connecting step). Through the above steps, the coil 3 wound around the magnetic body 2 having a rectangular cross section is formed.

  As described above, according to the electric devices 1b and 1c according to this modification, the guide portion 53 that is in close contact with at least a part of the outer surface of the magnetic body 2 is formed on the base 5 on which the magnetic body 2 is placed. It becomes easy to position the magnetic body 2 at a predetermined position on the base 5. Further, the guide portion 53 is formed with a through hole 533 and a groove 534 through which the conductive member 31 passes, so that the guide portion serves as an element for positioning the conductive member 31 as well as an element for positioning the magnetic member 2. 53 can be used.

  In the present modification, the height of the guide portion 53 (the length in the vertical direction of the portion protruding from the upper surface of the pedestal 5) may be greater than the height of the magnetic body 2 (length in the vertical direction). preferable. In this way, as shown in FIGS. 4B and 5B, the upper surface of the magnetic body 2 and the portion extending in the horizontal direction in the conductive member 31 are in a non-contact state. This is because even if at least one of the conductive members 31 is not covered with an insulating material, the insulation state between the two can be secured. Strictly speaking, the height difference between the upper surface of the guide portion 53 and the upper surface of the magnetic body 2 may be set to be equal to or greater than the insulation distance to be secured. Further, when at least one of the magnetic body 2 and the conductive member 31 is not covered with an insulating material in this way, both the portions extending in the vertical direction of the conductive member 31 and the magnetic body 2 are not in contact with each other. It is necessary that a part of the guide portion 53 exists between the two. That is, when the groove 534 is formed in the guide portion 53, the groove needs to be opened toward the radially outer side.

  In the above description, it has been described that the guide portion 53 includes the relatively small annular protrusion 531 and the relatively large annular protrusion 532, but this is merely an example. If the magnetic body 2 can be positioned (that is, in close contact with at least a part of the outer surface of the magnetic body 2) and the groove 534 or the through hole 533 through which the conductive member 31 passes can be formed, the shape Can be appropriately changed.

  The electric device 1d according to the third modification shown in FIG. 6A is a problem caused by using the magnetic body 2 formed in a circle and the plurality of conductive members 31 having the same shape, particularly the magnetic body 2 is compared. This solves problems that may occur when the target is small.

  In the present modification, the land 41 formed on the inner side of the magnetic body 2 and the land group formed on the outer side of the magnetic body 2 in the substrate 4 are specifically set so that the lands 41 are not located on the same circle. Is formed so that the center of the land 41 is not located on one circle. That is, the distance from the center of the magnetic body 2 of a certain land 41 is set so as to be different from the distance from the center of the magnetic body 2 of at least one land 41 different from each other on the inside and outside of the magnetic body 2. Thus, the lands 41 are formed so as to be shifted from each other in the radial direction of the magnetic body 2. Since the positioning hole 42 is formed at the center of the land 41, the positioning hole 42 is also formed so as not to be positioned on the same circle. The reason is as follows.

  If the magnetic body 2 formed in a circle is small, the space inside the magnetic body 2 in the substrate 4 is small. In such a case, it is difficult to form the lands 41 arranged along the same circle in the small space. In this modification, a plurality of lands 41 are not arranged along the same circle. The land 41 can be formed in the small space.

  Here, since the manufacturing cost will increase if the shape of each of the plurality of conductive members 31 is different, it is desirable that all of the conductive members 31 have the same shape. Assuming that the conductive members 31 having the same shape are used, when the lands 41 formed on the inner side of the magnetic body 2 are not arranged along the same circle, the magnetic body 2 The lands 41 formed on the outside do not line up along the same circle. In addition, in the electric equipment 1d concerning this modification, the length of the part extended in the horizontal direction which comprises the electroconductive member 31 should be longer than the electric equipment 1 concerning the said embodiment. If the length of the portion is increased, the position of the conductive member 31 in the radial direction with respect to the magnetic body 2 can be changed, and the degree of freedom in arranging the lands 41 is improved (the length of the portion extending in the horizontal direction). In addition, if the difference in the radial length of the magnetic body 2 is small, the conductive member 31 can hardly be moved in the radial direction.

  As described above, when the magnetic body 2 is formed in a circle and the plurality of conductive members 31 are formed in the same shape, the plurality of conductive members 31 are usually arranged in a circle. As a matter of fact, if the size of the magnetic body 2 formed in a circular shape is small, there is a possibility that a space for arranging the land 41 cannot be secured inside the magnetic body 2 (inside the circle). On the other hand, the land 41 is arranged even when the space inside the magnetic body 2 is small by preventing the land 41 from being located on the same circle as in the electric device 1d according to the present modification. It becomes possible to do.

  In addition, in this modification, although the structure which does not use the base 5 like the said embodiment was demonstrated to the example, it is set as the structure using the base 5 like the said 1st modification and a 2nd modification. It is also possible (see the electric device 1e shown in FIG. 6B). Since the land 41 (positioning hole 42) is formed so as not to line up along the same circle, the guide hole 52 formed in the pedestal 5 that overlaps the land 41 in the vertical direction does not line up along the same circle. It becomes composition.

  The electric device 1f according to the fourth modification shown in FIG. 7 includes a conductive member set 6 in which a plurality of conductive members 31 constituting the coil 3 are fixed to a base 61 formed of an insulating material. Is.

  The base material 61 is a circular (annular) member as a whole in which a circular (annular) space 611 is formed on the inner side. The inner circular space 611 has a rectangular cross section and is formed in a size that allows the magnetic body 2 to be inserted. A plurality of conductive members 31 are fixed to the base material along the outside of the space 611. The conductive member 31 is a substantially “U” -shaped member similar to the conductive member 31 in the above embodiment. That is, it is a member having a portion along the upper surface of the base material 61 and a portion along the outer surface and the inner surface of the base material 61. Various methods for fixing the conductive member 31 to the substrate 61 are conceivable. For example, a member similar to the conductive member 31 in the above embodiment is prepared, and the member is fixed to the base material 61 by insert molding, or the outer surface of the base material 61 obtained by molding into the above shape, Examples include a method of patterning (printing) the conductive member 31. Note that if the conductive member 31 is exposed to the portion facing the space 611, as will be described later, the conductive member 31 is short-circuited with the magnetic body 2 located in the space 611, so that the conductive member 31 does not face the space 611. It is necessary to fix to the material 61.

  The magnetic body 2 is located in the space 611 formed in the substrate 61. That is, the conductive member set 6 is disposed so as to cover the magnetic body 2 placed on the substrate 4. A land 41 connected by a conductive pattern 32 is formed outside the conductive member set 6 arranged in this manner. By connecting the end of each conductive member 31 of the conductive member set 6 arranged at a predetermined position to the land 41 by soldering or the like, the conductive member 31 and the conductive pattern 32 surround the magnetic body 2. Coil 3 is constructed.

  The manufacturing process (electric device manufacturing method) of the electrical device 1f according to the present modification having such a configuration is as follows. First, 1) a plurality of conductive members 31 are fixed to a base material 61 made of an insulating material in which a space 611 having one opening is formed (the method is already described), thereby obtaining a conductive member set 6 ( Conductive member assembly creation process). 2) The magnetic body 2 is placed at a predetermined position on the substrate 4 (magnetic body supporting step). Subsequently, 3) the conductive member set 6 is supported on the substrate 4 so that the magnetic body 2 is positioned in the space 611, and the magnetic body 2 is positioned inside the conductive member 31 (conductive member set arrangement). Process). Finally, 4) by electrically connecting the end portions of the respective conductive members 31 to the corresponding lands 41 (for example, soldering), the conductive members 31 and the conductive patterns 32 electrically connected thereto are used. The coil 3 surrounding the magnetic body 2 is formed (conductive member connecting step). In addition, you may replace the order of an electroconductive member group creation process and a magnetic body support process. Through the above steps, the coil 3 wound around the magnetic body 2 having a rectangular cross section is formed.

  Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

  For example, in the above-described embodiment and each modification, it has been described that both the primary side coil and the secondary side coil of the transformer are constructed by the conductive member 31 and the conductive pattern 32. Only the conductive member 31 and the conductive pattern 32 may be used. That is, when a plurality of coils 3 are constructed around the magnetic body 2, at least one of the plurality of coils 3 only needs to have the configuration. Further, the present invention can be applied to a configuration in which one coil 3 is provided outside one magnetic body 2. The number of turns of the coil 3 can be changed as appropriate. Further, the technical idea shown in FIG. 2 (change of the number of turns of the coil 3) can be applied to each modification.

1 (1a-1f) Electrical equipment
2 Magnetic body 3 Coil 31 Conductive member 32 Conductive pattern 4 Substrate 41 Land 42 Positioning hole 43 Mounting component 5 Base 52 Guide hole 521 Tapered portion 53 Guide portion 533 Through hole 534 Groove 6 Conductive member set 61 Base material 611 Space

Claims (14)

Magnetic material,
One or a plurality of coils provided outside the magnetic body;
A substrate for supporting the magnetic body;
With
At least one of the coils is constituted by a plurality of conductive members arranged outside the magnetic body and a conductive pattern formed on the substrate that electrically connects adjacent conductive members. An electric device comprising a substrate characterized by the above. A pedestal on which the magnetic body is placed, fixed to the substrate at a predetermined interval from the surface of the substrate;
A plurality of lands for electrically connecting the conductive member and the conductive pattern are formed on the substrate,
The electrical device having a substrate according to claim 1, wherein a guide hole, which is a through hole through which the conductive member passes, is formed in the pedestal at a position overlapping the land.   The electrical device including the substrate according to claim 2, wherein a guide portion that is in close contact with at least a part of the outer surface of the magnetic body is formed on the pedestal.   The electrical device comprising the substrate according to claim 3, wherein a through hole or a groove through which the conductive member passes is formed in the guide portion of the pedestal so as to overlap the land. A base member made of an insulating material in which a space opened on one side is further provided with a conductive member set in which the plurality of conductive members are fixed,
The electrical apparatus comprising the substrate according to claim 1, wherein the conductive member set is supported by the substrate so that the magnetic body is positioned in the space. The magnetic body is formed in a circular shape, and the plurality of conductive members are formed in the same shape,
A plurality of lands for electrically connecting the conductive member and the conductive pattern are formed on the inside and outside of the magnetic body on the substrate, respectively on the inside and outside of the magnetic body. 2. The electric apparatus comprising the substrate according to claim 1, wherein a distance of a land from the center of the magnetic body is set to be different from a distance of the land different from the center of the magnetic body. . A plurality of conductive patterns having one end positioned on one side of the magnetic body and the other end positioned on the other side of the magnetic body are formed on the substrate so as to be arranged along the magnetic body.
Each of the plurality of conductive members has one end connected to one end of a certain conductive pattern of the plurality of conductive patterns and the other end connected to the other end of the conductive pattern adjacent to the certain conductive pattern. An electrical apparatus comprising the substrate according to any one of claims 1 to 6. A plurality of conductive patterns having one end positioned on one side of the magnetic body and the other end positioned on the other side of the magnetic body are formed on the substrate so as to be arranged along the magnetic body.
At least one of the plurality of conductive members is connected to one end of a certain conductive pattern of the plurality of conductive patterns and the other end is not a conductive pattern adjacent to the certain conductive pattern. It is connected to the other end of a conductive pattern, The electric equipment provided with the board | substrate as described in any one of Claims 1-6 characterized by the above-mentioned. A conductive pattern forming step of forming a conductive pattern including a plurality of lands on the substrate;
A magnetic material supporting step for supporting the magnetic material on the substrate;
After this magnetic body supporting step, a conductive member disposing step of disposing a plurality of conductive members so that the magnetic body is located inside and the end portion is close to the land,
After this conductive member disposing step, by electrically connecting the end of each conductive member to the corresponding land, the coil surrounding the magnetic body by the conductive member and the conductive pattern electrically connected thereto. A conductive member connecting step for forming;
The manufacturing method of an electric equipment provided with the board | substrate characterized by including. The magnetic material supporting step includes a step of fixing a pedestal to the substrate at a predetermined interval from the surface of the substrate, and placing the magnetic material on the pedestal so that the magnetic material is applied to the substrate via the pedestal. And a procedure for supporting the body,
In the conductive member arranging step, the conductive member is arranged at a predetermined position by passing the conductive member through a guide hole which is a through hole formed at a position overlapping the land on the pedestal. A method for manufacturing an electrical device comprising the substrate according to claim 9. The magnetic body supporting step includes a step of fixing a pedestal to the substrate at a predetermined interval from the surface of the substrate, and a guide portion formed on the pedestal is brought into close contact with at least a part of the outer surface of the magnetic body. And supporting the magnetic body on the substrate through the pedestal,
In the conductive member disposing step, the conductive member is disposed at a predetermined position by passing the conductive member through a through hole or a groove formed at a position overlapping the land in the guide portion. The manufacturing method of an electric equipment provided with the board | substrate of Claim 9. A conductive pattern forming step of forming a conductive pattern including a plurality of lands on the substrate;
A conductive member set creating step for obtaining a conductive member set by fixing a plurality of conductive members to a base material made of an insulating material in which a space opened on one side is formed;
A magnetic material supporting step for supporting the magnetic material on the substrate;
After this magnetic body supporting step, the conductive member group is supported by the substrate so that the magnetic body is positioned in the space, and the magnetic body is positioned inside the conductive member. The placement process;
After the conductive member assembly arrangement step, the end portions of the conductive members are electrically connected to the corresponding lands, so that the magnetic body is surrounded by the conductive members and the conductive pattern electrically connected thereto. A conductive member connecting step for forming a coil;
The manufacturing method of an electric equipment provided with the board | substrate characterized by including. In the conductive pattern forming step, a plurality of conductive patterns are formed on the substrate such that a land on one end side is positioned on one side of the magnetic body and a land on the other end side is positioned on the other side of the magnetic body. It is a process of forming to line up along the magnetic body,
In the conductive member connecting step, one end of each of the plurality of conductive members is connected to a land on one end side of a certain conductive pattern of the plurality of conductive patterns, and the other end is electrically connected to the certain conductive pattern. It is a process connected to the land of the other end side of a pattern, The manufacturing method of an electric equipment provided with the board | substrate as described in any one of Claims 9-12 characterized by the above-mentioned. In the conductive pattern forming step, a plurality of conductive patterns are formed on the substrate such that a land on one end side is positioned on one side of the magnetic body and a land on the other end side is positioned on the other side of the magnetic body. It is a process of forming to line up along the magnetic body,
In the conductive member connecting step, at least one end of the plurality of conductive members is connected to a land on one end side of a certain conductive pattern of the plurality of conductive patterns, and the other end is connected to the certain conductive pattern. The method for manufacturing an electric device comprising the substrate according to claim 9, further comprising a step of connecting to a land on the other end side of another conductive pattern that is not an adjacent conductive pattern. .

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