WO2017073145A1

WO2017073145A1 - Coil assembly and electrical connection box

Info

Publication number: WO2017073145A1
Application number: PCT/JP2016/074454
Authority: WO
Inventors: 敏之土田
Original assignee: 株式会社オートネットワーク技術研究所; 住友電装株式会社; 住友電気工業株式会社
Priority date: 2015-10-27
Filing date: 2016-08-23
Publication date: 2017-05-04
Also published as: JP2017084927A

Abstract

A coil assembly mounted on a circuit board having a conductive circuit, wherein there is provided a coil having a winding part with a rectangular wire wound edgewise, both ends of the rectangular wire have an extension part extending in the extension direction from the winding part and a step part extending from the extension part in an intersecting direction that intersects the extension direction, the tip of the step part is fashioned into a connecting part that extends in the extension direction and is connected to the conductive circuit, and there is also provided a pressing part for pressing the connecting part toward the conductive circuit side.

Description

Coil assembly and electrical junction box

The technology disclosed in this specification relates to a coil assembly and an electrical junction box.

Conventionally, a coil assembly in which a coil is held between a pair of core members is known. For example, a configuration in which a coil unit wound in an annular shape is arranged around a columnar protrusion of a pair of ferrite cores called E-type cores is known.

Japanese Patent Laying-Open No. 2005-45119

When connecting the coil assembly to the conductive circuit, for example, the main body of the coil is arranged at a predetermined position on the front side of the circuit board, and the terminal of the coil is arranged on the back side through the connection opening provided on the circuit board. There is a case where solder connection is made to the bus bar. However, in such a case, the circuit board is connected between the bottom surface of the body of the coil assembly (the surface in contact with the circuit board) and the connection portion of the terminal led out from the coil and bent toward the bus bar. A step corresponding to the thickness is generated.

However, since the coil itself has a winding structure and the terminal is bent, it is not easy to increase the dimensional accuracy, and the connection part of the terminal contacts the bus bar on the back side of the circuit board with high accuracy. It was difficult to make. Moreover, since the electronic component mounted on the circuit board is relatively large and has a spring property in structure, stress is easily applied to the connection portion due to vibration of the vehicle or the like. Therefore, when connecting the terminal portion of the coil and the conductive circuit by soldering, the connection reliability may be reduced.

The technique disclosed in the present specification has been completed based on the above-described circumstances, and aims to improve connection reliability when soldering a coil assembly to a conductive circuit.

The technology disclosed in this specification is a coil assembly mounted on a circuit board having a conductive circuit, and includes a coil having a winding portion in which a flat wire is wound in an edgewise manner. Both end portions of the step portion have an extending portion extending in the extending direction from the winding portion, and a step portion extending in the intersecting direction intersecting the extending direction from the extending portion, and the tip of the step portion is The connecting portion extends in the extending direction and is connected to a conductive circuit, and includes a pressing portion that presses the connecting portion toward the conductive circuit.

The technology disclosed in the present specification is an electrical junction box including a circuit structure in which a coil assembly is mounted on a circuit board having a conductive circuit, and a case that houses the circuit structure inside. The coil assembly includes a coil having a winding portion in which a flat wire is wound in an edgewise manner, and both ends of the flat wire are extended portions extending in the extending direction from the winding portion. And a step portion extending in an intersecting direction intersecting the extension direction from the extension portion, and a tip portion of the step portion extends in the extension direction and is connected to a conductive circuit. The case is provided with a pressing portion that presses the connection portion toward the circuit board.

According to the above configuration, since the connecting portion of the coil is pressed toward the conductive circuit by the pressing portion, the connecting portion and the conductive circuit are reliably electrically connected. Accordingly, the connection reliability between the coil and the conductive circuit is improved.

The coil assembly may have the following configuration.

A winding part and a column part are provided with a magnetic core having a pair of wall parts sandwiching the coil from the axial direction of the winding part, and a pillar part extending in the axial direction from the wall part and inserted inside the winding part. A bobbin having a cylindrical portion disposed between the pair of flange portions and a pair of flange portions projecting outward from both ends of the tubular portion and disposed between the winding portion and the wall portion. The pressing portion may be provided in the collar portion.

According to such a configuration, the coil and the magnetic core can be relatively positioned by the bobbin. Moreover, since the pressing part is formed in this bobbin, compared with the case where the pressing part is formed in parts different from the bobbin, the number of parts can be reduced.

The pressing portion may be a plate piece or a rod-like portion extending from the collar portion toward the connecting portion, and the plate piece or the rod-like portion may be provided with an error absorbing portion that can expand and contract in the pressing direction with respect to the connecting portion. Good.

According to such a configuration, even if a slight error occurs between the tip of the pressing portion and the connecting portion in the coil assembly, the error can be absorbed by the error absorbing portion.

Also, the electrical junction box may have the following configuration.

The case may include a lower case that houses the circuit structure therein and an upper case that covers the lower case, and the pressing portion may be provided in the upper case.

Alternatively, the case includes a lower case that accommodates the circuit structure therein, an upper case that covers the lower case, and a frame body that is disposed between the upper case and the lower case. The body may be provided with a bridging portion disposed at a position facing the connecting portion in a state where the circuit board is positioned in the lower case, and the pressing portion may be provided at the bridging portion.

According to such a configuration, since the pressing portion can be formed by using a part of the case that accommodates the circuit structure, compared to the case where the pressing portion is formed on a component different from the case, The number of parts can be reduced.

The pressing portion is a plate piece or a rod-like portion extending from the upper case or the bridge portion toward the connecting portion, and the plate piece or the rod-like portion is provided with an error absorbing portion that can be expanded and contracted in the pressing direction with respect to the pressing portion. It is good also as a structure.

According to such a configuration, even if a slight error occurs between the tip of the pressing portion and the connecting portion in the electrical junction box, the error can be absorbed by the error absorbing portion.

Further, the circuit board has a bus bar as a conductive circuit laminated on a surface opposite to the surface on which the coil assembly is mounted, and has an opening through which the bus bar is exposed, and the connection portion has the opening. It is good also as a structure connected to the said bus-bar exposed from.

A step is formed between the circuit board and the bus bar by the thickness dimension of the circuit board. The above configuration can improve the electrical connection reliability between the coil connection portion and the bus bar even when a step is formed between the circuit board and the bus bar.

According to the technique disclosed in this specification, the connection reliability when the coil assembly is soldered to the conductive circuit can be improved.

1 is an exploded perspective view of a coil assembly according to Embodiment 1. FIG. Perspective view of coil assembly Right side view of coil assembly Rear view of coil assembly Right cross-sectional view of the coil assembly mounted on the circuit board The perspective view of the electrical junction box of Embodiment 2 The perspective view of the state which positioned the circuit structure to the baseplate part Disassembled perspective view of bottom plate and frame to which circuit structure is attached The perspective view of the state which assembled | attached the frame to the baseplate part to which the circuit structure was attached The top view of the state which assembled | attached the frame to the baseplate part to which the circuit structure was attached AA sectional view of FIG. 11 is an enlarged cross-sectional view of the main part of FIG.

<Embodiment 1>
The first embodiment will be described with reference to FIGS.

The coil assembly 1 according to the present embodiment includes a magnetic core 10, a coil 20 formed by winding a winding, and a bobbin 30 (see FIG. 1). For example, an electric vehicle, a hybrid vehicle, and the like. It can be used as a choke coil or the like that is provided in a DC / DC converter of a vehicle and smoothes an output voltage. In the following description, the top in FIGS. 1 and 2 is the top, the bottom is the bottom, the left front is the front, the right back is the back, the right front is the right, and the left back is the left.

(Magnetic core 10)
The magnetic core 10 is a so-called E-type core, and is formed by combining a pair of first core 10A and second core 10B having the same shape and size as shown in FIGS. The first core 10A and the second core 10B each have a rectangular thick plate-like bottom wall portion 11 (an example of a wall portion), and the bottom wall portions 11 face each other with their plate surfaces facing each other. Arranged.

A pair of side walls 12 extending toward the mating core is provided at the edges of the pair of short sides extending in the front-rear direction of the bottom wall 11. In addition, a columnar column portion 13 that protrudes in the same direction as the extending direction of the side wall portion 12 is provided at the center portion of the bottom wall portion 11. The rising dimension (height dimension) from the bottom wall part 11 of the side wall part 12 and the column part 13 is made equivalent.

(Coil 20)
The coil 20 of this embodiment is an edgewise coil formed by winding a rectangular wire in an edgewise shape and in an annular shape. As shown in FIG. 1, the coil 20 is wound from the upper end and the lower end of the wound portion 21 that forms a cylindrical shape as a whole, and both ends of the rectangular wire are directed in the same direction (forward), and It extends in parallel and is bent in a crank shape downward.

Hereinafter, in FIG. 1, an end portion extending from the upper side of the winding portion 21 is referred to as a first end portion 22A, and an end portion extending from the lower side is referred to as a second end portion 22B. Further, a portion of the first end portion 22A that extends from the winding portion 21 toward the front B (an example of the extending direction) is connected to the first extending portion 23A and the first extending portion 23A, and is downward C. A portion extending toward (an example of a crossing direction intersecting with the extending direction) is a first step portion 24A, and a tip portion extending toward the front B is connected to the first step portion 24A and is a first connection portion 25A. Similarly, a portion of the second end portion 22B that extends from the winding portion 21 toward the front B extends to the second extension portion 23B and the second extension portion 23B and extends toward the lower portion C. The second step portion 24B and the tip portion that extends forward and continues to the second step portion 24B are referred to as a second connection portion 25B.

The first connection part 25A and the second connection part 25B are arranged in parallel with the first extension part 23A and the second extension part 23B. In addition, the first connection portion 25 A and the second connection portion 25 B are disposed at the same height (equal to each other), and are disposed below the lower end edge of the winding portion 21.

(Bobbin 30)
A bobbin 30 is disposed between the magnetic core 10 and the coil 20. The bobbin 30 is made of insulating resin, and as shown in FIG. 1, a first divided bobbin body 31 and a second divided bobbin body 41 that are divided into two in a direction orthogonal to the axial direction L of the winding portion 21 of the coil 20. A combination of

The first divided bobbin body 31 is disposed on the upper side of the coil 20, and a pair of sides extending in the front-rear direction among the rectangular plate-shaped first bottom wall portion 32 (an example of a flange portion) and the first bottom wall portion 32. And a pair of first side wall portions 33 extending downward from the edges of the first side wall portion 33. A first hole 34 that penetrates the plate surface is provided at the center of the first bottom wall 32.

A pair of pressing pieces 35 are provided on the front end edge of the first bottom wall portion 32. The pressing piece 35 (an example of a pressing portion) has a plate shape that extends forward from the first bottom wall portion 32 and is bent in an L shape downward, and its tip portion is a coil. In a state where the assembly 1 is assembled, the length is set to press the upper surfaces of the

connection portions

25A and 25B of the coil 20. That is, it is set as the length dimension which protrudes below the bottom face of the magnetic core 10 (2nd core 10B).

A groove portion 36 (an example of an error absorbing portion) extending in the width direction (left-right direction) is provided on the front surface near the tip of the pressing piece 35. By making the thinned portion by the groove 36 deformable, the pressing piece 35 can be expanded and contracted in the pressing direction P (vertical direction), and the pressing piece 35 contacts the connecting

portions

25A and 25B. It is designed to absorb dimensional errors when doing so.

In addition, the length dimension of the 1st bottom wall part 32 in the front-back direction is set to a dimension larger than the length dimension of the bottom wall part 11 of the magnetic core 10 in the front-back direction (short side), The first bottom wall portion 32 protrudes in the front-rear direction from the bottom wall portion 11 of the first core 10A (see FIG. 3).

Moreover, the width dimension (length dimension in the left-right direction) of the first bottom wall portion 32 is set to be slightly smaller than the dimension between the pair of side wall portions 12 of the magnetic core 10 (inner side). The first bottom wall portion 32 is adapted to fit between the pair of side wall portions 12 of the first core 10A (see FIGS. 2 and 4).

The height dimension of the pair of first side wall parts 33 is set to be the same as the protruding dimension of the side wall part 12 of the magnetic core 10 from the bottom wall part 11, and the lower end surface of the first side wall part 33 in the assembled state is The magnetic core 10 is flush with the lower end surface of the side wall 12 (see FIGS. 2 to 4). Further, the first hole portion 34 is set to have a slightly larger diameter than the column portion 13 so as to penetrate the column portion 13 of the magnetic core 10 (first core 10A).

On the other hand, the second divided bobbin body 41 includes a substantially rectangular plate-like second bottom wall part 42 (an example of a flange) having the same dimensions as the first bottom wall part 32 of the first divided bobbin body 31, and a second bottom wall. The pair of second side walls 43 extending upward from the edges of the pair of sides extending in the front-rear direction of the portion 42 and the other pair of sides extending in the width direction (left-right direction) of the second bottom wall 42. A pair of

support wall portions

45, 46 extending downward from the edges of the first and second support walls. In addition, a second hole portion 44 penetrating the plate surface is provided at the center portion of the second bottom wall portion 42, and a cylindrical portion 47 extending upward from the hole edge of the second hole portion 44 is provided. Yes.

The height dimension of the pair of second side wall parts 43 is set to be equal to the projecting dimension of the side wall part 12 of the magnetic core 10 from the plate surface of the bottom wall part 11. The upper end surface is flush with the upper end surface of the side wall 12 of the magnetic core 10 (see FIGS. 2 to 4).

The dimension between the pair of support wall portions 45 and 46 (inside) is set to be slightly larger than the length dimension of the bottom wall portion 11 of the magnetic core 10 in the front-rear direction. The bottom wall 11 of the magnetic core 10 is fitted almost exactly between the support walls 45 and 46 (see FIGS. 2 and 3). That is, in the assembled state, the pair of

support wall portions

45 and 46 protrude outward from the bottom wall portion 11 of the magnetic core 10. Further, the projecting dimension of the pair of

support wall parts

45 and 46 from the plate surface of the second bottom wall part 42 is set to be equal to the height dimension (thickness dimension) of the bottom wall part 11 of the magnetic core 10. In the assembled state, the lower end surfaces of the

support wall portions

45 and 46 are flush with the lower surface of the bottom wall portion 11 of the magnetic core 10 (see also FIGS. 2 to 4).

Furthermore, the second hole portion 44 is set to have a slightly larger diameter than the column portion 13 so as to penetrate the column portion 13 of the magnetic core 10 (second core 10B). In other words, the cylindrical portion 47 is set to have an inner diameter dimension through which the column portion 13 can be inserted. Further, the projecting dimension of the tubular part 47 from the second bottom wall part 42 is equivalent to the projecting dimension of the second side wall part 43 from the second bottom wall part 42.

Note that the winding portion 21 of the coil 20 described above is fitted around the cylindrical portion 47. In other words, the inner diameter dimension of the winding part 21 is set to be slightly larger than the outer diameter dimension of the cylindrical part 47.

Of the pair of

support wall portions

45, 46 of the second divided bobbin body 41, a pair of fitting grooves 48 are cut out on the front surface of the front support wall portion 45 arranged on the front side so as to extend in the vertical direction. Is provided. The pair of fitting grooves 48 are provided at a width dimension and a position where the first stepped portion 24A and the second stepped portion 24B of the coil 20 described above can be fitted in the state where the coil assembly 1 is assembled. Thereby, the first end 22A and the second end 22B of the coil 20 are stably held.

As shown in FIG. 5, the coil assembly 1 described above is placed at a predetermined position on the circuit board 50, and a pair of connection portions 25 A and 25 B are exposed from the opening portion 51. In one example), the conductive connection is established by soldering.

(Function and effect)
According to the coil assembly 1 of this embodiment described above, the first connecting portion 25A and the second connecting portion 25B of the coil 20 are pressed toward the circuit board 50 by the pressing piece 35 provided on the bobbin 30. Therefore, even when the dimensional accuracy of the first end portion 22A and the second end portion 22B derived from the winding portion 21 of the coil 20 is not high, the first connection portion 25A and the second connection portion 25B are securely connected to the bus bar 52. Since it can be made to contact, both electrical connection reliability improves.

Further, since the coil assembly 1 includes the bobbin 30, the coil 20 and the magnetic core 10 can be relatively positioned by the bobbin 30. Further, since the pressing piece 35 is provided on the bobbin 30, the number of parts can be reduced as compared with the case where the pressing piece 35 is formed on a part different from the bobbin 30.

Further, a step is formed between the circuit board 50 and the bus bar 52 by the thickness dimension of the circuit board 50. According to the coil assembly 1 of the present embodiment, there is such a step. Even in this case, the electrical connection reliability between the

connection portions

25A and 25B of the coil 20 and the bus bar 52 can be improved.

Further, since the groove portion 36 is provided in the pressing piece 35, even if there is a slight error between the tip end portion of the pressing piece 35 and the first connection portion 25 A or the second connection portion 25 B, the error Can be absorbed by the groove 36.

Thus, according to the coil assembly 1 of the present embodiment, the connection reliability with the bus bar 52 can be improved.

<Embodiment 2>
Next, a second embodiment will be described with reference to FIGS. The electric junction box 100 of this embodiment shown in FIG. 6 is a DC / DC converter provided in a vehicle such as an electric vehicle or a hybrid vehicle.

As shown in FIG. 7, the coil assembly 2 provided in the electrical junction box 100 is not provided with the pressing piece 35 provided in the bobbin 30 of the first embodiment, and instead, for example, as shown in FIG. Thus, the place where the pressing piece 85 is provided in the case 70 in which the coil assembly 2 is accommodated is different.

In the coil assembly 2 of the present embodiment described below, the bobbin is represented by 55, and the same reference numerals are assigned to other identical members, and redundant description is omitted.

The electrical junction box 100 includes a circuit structure 63 (see FIG. 7) in which the coil assembly 2 is mounted on the circuit board 60, and a case 70 that houses the circuit structure 63 therein (see FIG. 6).

(Circuit structure 63)
The circuit structure 63 is a circuit board 60 in which a printed circuit (not shown) is formed on the surface of an insulating substrate by a printed wiring technique, and a plurality of bus bars 62 (an example of a conductive circuit) are arranged and bonded in a predetermined pattern on the back surface. And an electronic component including the coil assembly 2 is mounted thereon.

The circuit board 60 has a substantially rectangular shape as shown in FIG. 7, and a pair of connection openings 61 are provided at predetermined positions. These openings 61 are for mounting the coil assembly 2 on the bus bar 62, and the coil assembly 2 is connected to the surface of the bus bar 62 exposed from the opening 61 by soldering.

In the circuit board 60, a pair of through holes 64 for penetrating a column part 72 of a bottom plate part 71 described later are provided on both the left and right sides of the area where the coil assembly 2 is disposed.

Further, two external connection bus bars 62A for connecting to an external terminal (not shown) protrude from the front side edge (the left front side in FIG. 7) of the circuit board 60, and the front end portion is bent in a crank shape. ing. Bolt holes 65 through which connection bolts (not shown) are passed are formed in these tip portions.

(Case 70)
The circuit board 60 is accommodated in the case 70. As shown in FIGS. 8 to 10, the case 70 has a rectangular flat plate bottom plate portion 71 (an example of a lower case) disposed on the lower surface side of the circuit board 60 and a substantially rectangular shape surrounding the circuit board 60. Frame-shaped frame 80 (an example of a frame) and a cover 90 (an example of an upper case) that covers the circuit board 60 positioned on the bottom plate 71 from above the frame 80 (FIG. 6). reference).

The bottom plate portion 71 is made of a metal material having excellent thermal conductivity, such as aluminum or aluminum alloy, and has a function as a heat sink that dissipates heat generated in the circuit board 60.

Although not shown, an insulating sheet is stacked on the upper surface of the bottom plate portion 71 to achieve insulation between the bottom plate portion 71 and the circuit board 60 (bus bar 62). The insulating sheet has adhesiveness that can be fixed to the bottom plate portion 71 and the bus bar 62.

As shown in FIG. 7, a pair of round bar-like column portions 72 are erected upward at positions corresponding to the pair of through holes 64 of the circuit board 60 in the bottom plate portion 71. A screw hole 73 for screwing the bolt 75 is provided in the portion 72. Positioning of the circuit board 60 with respect to the bottom plate portion 71 is achieved by passing the column portion 72 of the bottom plate portion 71 through the through hole 64 of the circuit board 60.

As shown in FIG. 8, the coil assembly 2 placed at a predetermined position on the surface side of the circuit board 60 has the magnetic core 10 pressed against the bottom plate portion 71 side by the plate-like pressing member 95, so that the vertical direction The positional deviation is prevented. The pressing member 95 covers a part of the upper surface and the side surface of the magnetic core 10 (first core 10A), and a protruding portion 95A protruding to the left and right sides is overlapped on the upper surface of the column portion 72, so that the bolt 75 It is being fixed to the pillar part 72 by.

The frame 80 is made of synthetic resin, and one of the four side walls (the front side wall 81A on the left front side in FIG. 8) has a bus bar through hole 82 through which the above-described external connection bus bar 62A passes, and a bus bar through hole 82. A pair of support bases 83 that support the external connection bus bar 62A led out from is provided.

In the frame 80, a pair of left and

right side walls

81B and 81C is provided with a bridging portion 84 that bridges the pair of

side walls

81B and 81C. The bridging portion 84 has a prismatic shape extending from the upper ends of the pair of

side walls

81B and 81C toward the opposing

side walls

81C and 81B. The bridging portion 84 is provided so as to include a position facing the first connection portion 25A and the second connection portion 25B of the coil assembly 2 in a state where the circuit component 63 is accommodated at a predetermined position in the case 70. (See FIGS. 10 and 11).

The bridging portion 84 is provided with a pair of plate-like pressing pieces 85 (an example of a pressing portion) extending downward from the lower surface side thereof. The pressing piece 85 is provided at a position facing the first connection portion 25A and the second connection portion 25B of the coil assembly 2 in a state where the circuit structure 63 is accommodated at a predetermined position in the case 70. The front end portion is set to a length dimension that presses the upper surfaces of the

connection portions

25A and 25B of the coil 20 (see FIGS. 9 and 11).

A groove 86 (an example of an error absorbing portion) extending in the width direction (left-right direction) of the pressing piece 85 is provided on the front surface (the right-side surface in FIGS. 11 and 12) near the tip of the pressing piece 85. By making the portion thinned by the groove 86 deformable, the pressing piece 85 can be expanded and contracted in the pressing direction P (vertical direction), and the pressing piece 85 contacts the connecting

portions

25A and 25B. It is designed to absorb dimensional errors when doing so.

The cover 90 is made of a synthetic resin and has a rectangular plate shape that covers the frame 80. When the cover 90 is overlaid on the frame 80, the case 70 is closed (see FIG. 6).

(Function and effect)
According to the electrical junction box 100 of the present embodiment described above, the first connecting portion 25A and the second connecting portion 25B of the coil 20 are pressed against the circuit board 60 side by the pressing piece 85 provided in the case 70 (frame 80). Is done. Therefore, even when the dimensional accuracy of the first end portion 22A and the second end portion 22B derived from the winding portion 21 of the coil 20 is not high, the first connection portion 25A and the second connection portion 25B are securely connected to the bus bar 62. Since it can be made to contact, both electrical connection reliability improves.

Further, since the pressing piece 85 can be provided by using a part of the case 70 that accommodates the circuit structure 63, the number of parts can be reduced as compared with the case where the pressing piece 85 is provided by a part different from the case 70. .

Further, as in the above embodiment, a step is formed between the circuit board 60 and the bus bar 62 by the thickness dimension of the circuit board 60. Even when there is such a step, the coil 20 The electrical connection reliability between the

connection portions

25A and 25B and the bus bar 62 can be improved.

Furthermore, since the groove part 86 is provided in the pressing piece 85, even if there is a slight error between the tip end part of the pressing piece 85 and the first connection part 25A or the second connection part 25B, the error Can be absorbed by the groove 86.

Thus, according to the electrical connection box 100 of the present embodiment, the connection reliability between the coil 20 and the bus bar 62 can be improved.

<Other embodiments>
The technology disclosed in this specification is not limited to the embodiment described with reference to the above description and drawings, and for example, the following embodiments are also included in the technical scope.

(1) In the first embodiment, the pressing piece 35 is integrally provided on the bobbin 30, and in the second embodiment, the pressing piece 85 is integrally provided on the frame 80 of the case 70. However, another member is a coil assembly. It is good also as a structure which provides the press part which presses a connection part toward the conductive circuit side by incorporating in an electrical connection box.

(2) The pressing portion is not limited to a plate-shaped pressing piece, and can be in any form.

(3) In the above embodiment, the

groove portions

36 and 86 are provided in the

pressing pieces

35 and 85 to form the error absorbing portion. However, the configuration of the error absorbing portion is not limited to the above embodiment. It can also be omitted.

(4) In the above embodiment, the first connecting portion 25A and the second connecting portion 25B are arranged at the same height (on the same plane), and both are provided on the back side bus bar 52 through the

openings

51 and 61 of the

circuit boards

50 and 60. , 62, but may be connected to conductive circuits arranged at different heights. For example, one connection portion may be connected to a bus bar arranged on the surface of the circuit board.

(5) In Embodiment 2 described above, the case 70 of the electrical junction box 100 is configured by the bottom plate portion 71, the frame 80, and the cover portion 90, but may be a case that does not include a frame. In that case, it is preferable to form the pressing portion integrally with the cover portion (upper case).

(6) In Embodiment 2 described above, the bottom plate portion 71 is made of metal and has the function of a heat sink. However, the bottom plate portion may be made of synthetic resin.

DESCRIPTION OF

SYMBOLS

1, 2 ... Coil assembly 10 ... Magnetic core 10A ... 1st core 10B ... 2nd core 11 ... Bottom wall part (wall part)
DESCRIPTION OF SYMBOLS 12 ... Side wall part 13 ... Column part 20 ... Coil 21 ... Winding part 22A ... 1st end part 22B ... 2nd end part 23A ... 1st extension part 23B ... 2nd extension part 24A ... 1st level | step difference part 24B ... 2nd level | step-difference part 25A ... 1st connection part 25B ...

2nd connection part

30, 45 ... Bobbin 31 ... 1st division | segmentation bobbin body 32 ... 1st bottom wall part (saddle part)
35, 85 ... pressing piece (pressing part)
36, 86 ... Groove (error absorbing part)
41 ... 2nd divided bobbin body 42 ... 2nd bottom wall part (saddle part)
47 ...

Cylindrical parts

50, 60 ...

Circuit boards

51, 61 ... Opening

parts

52, 62 ... Bus bar (conductive circuit)
53, 63 ... circuit structure 70 ... case 71 ... bottom plate (lower case)
80 ... Frame
84 ... Bridge 90 ... Cover (upper case)
B ... forward (extending direction)
C ... Down (cross direction)
L ... Axial direction P ... Pressing direction

Claims

A coil assembly mounted on a circuit board having a conductive circuit,
A coil having a winding portion in which a flat wire is wound edgewise,
Both ends of the flat wire have an extending part extending in the extending direction from the winding part, and a step part extending in the intersecting direction intersecting the extending direction from the extending part,
The tip of the stepped portion extends in the extending direction and is connected to the conductive circuit,
The coil assembly provided with the press part which presses the said connection part toward the said conductive circuit side.
A magnetic core having a pair of wall portions sandwiching the coil from the axial direction of the winding portion, and a pillar portion extending from the wall portion in the axial direction and inserted into the winding portion;
A pair of cylindrical portions disposed between the winding portion and the column portion, and a pair of portions extending outward from both ends of the cylindrical portion and disposed between the winding portion and the wall portion. And a bobbin having a buttock,
The coil assembly according to claim 1, wherein the pressing portion is provided in the flange portion.
The pressing portion is a plate piece or a rod-shaped portion that extends from the flange portion toward the connection portion, and the plate piece or the rod-shaped portion is provided with an error absorbing portion that can expand and contract in a pressing direction with respect to the connection portion. The coil assembly according to claim 2.
A circuit structure in which a coil assembly is mounted on a circuit board having a conductive circuit;
An electrical connection box comprising a case for housing the circuit structure therein,
The coil assembly includes a coil having a winding portion in which a flat wire is wound in an edgewise manner, and both ends of the flat wire are extended from the winding portion in the extending direction; A step portion extending in an intersecting direction intersecting the extension direction from the extension portion, and a tip of the step portion extends in the extension direction and is a connection portion connected to the conductive circuit. ,
An electrical connection box, wherein the case is provided with a pressing portion that presses the connection portion toward the circuit board.
The case includes a lower case that houses the circuit structure therein, and an upper case that covers the lower case,
The electrical connection box according to claim 4, wherein the pressing portion is provided in the upper case.
The pressing portion is a plate piece or a rod-shaped portion that extends from the upper case toward the connection portion, and the plate piece or the rod-shaped portion is provided with an error absorbing portion that can expand and contract in a pressing direction with respect to the pressing portion. The electrical junction box according to claim 5.
The case includes a lower case that houses the circuit structure therein, an upper case that covers the lower case, and a frame that is disposed between the upper case and the lower case. ,
The frame body is provided with a bridging portion disposed at a position facing the connection portion in a state where the circuit board is positioned in the lower case,
The electrical junction box according to claim 4, wherein the pressing portion is provided in the bridging portion.
The pressing portion is a plate piece or a rod-shaped portion that extends from the bridging portion toward the connection portion, and the plate piece or the rod-shaped portion is provided with an error absorbing portion that can expand and contract in a pressing direction with respect to the pressing portion. The electrical junction box according to claim 7.
The electrical junction box according to any one of claims 4 to 8,
The circuit board has a bus bar as the conductive circuit laminated on a surface opposite to a surface on which the coil assembly is mounted, and has an opening through which the bus bar is exposed.
The connection part is an electrical connection box connected to the bus bar exposed from the opening.