JP2009303405A - Circuit structure and electrical junction box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circuit structure having a plurality terminals protruding integrally on one edge of a substrate that is miniaturized without requiring a multilayer substrate: and to provide an electrical junction box. <P>SOLUTION: The circuit structure includes: a group of one terminals 33 formed by allowing ends of a plurality of first bus bars 30 to protrude from one edge of a substrate portion 11; a plurality of second bus bars 40 incorporated into the surface or backside of the substrate portion 11, having one end connected to the plurality of first bus bars 30 and the other end reaching the one edge of the substrate portion 11; a crossing section 43 provided on the other end of the plurality of second bus bars 40 and forming a substantially direction orthogonal to the direction in which the group of one end 33 protrude; a group of other terminals 44 disposed in a plurality of stages with the group of one terminals 33; and a first displacement regulating section 15 along the side opposite to the side of protrusion of the other terminals 44 for the crossing section 43 of the second bus bars 40. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a circuit structure and an electrical junction box.

Conventionally, a plurality of bus bars formed by punching a conductive plate are affixed to a substrate, or are integrally held on the substrate by insert molding to form a predetermined circuit, and electronic components such as relays are mounted on this circuit A circuit structure is known. In many such circuit components, the end portion of the bus bar protrudes from the substrate and constitutes a terminal portion that is electrically connected to an external terminal.
An electric junction box in which a circuit component is housed in a casing is generally stored and used in an engine room, and since the space in the engine room is limited, downsizing is desired. .

  Therefore, it is conceivable to mount electronic components on the substrate at a high density in order to reduce the area of the substrate and make the circuit structure compact. However, when it is desired to project a plurality of terminal parts together on one edge of the board due to the balance with external connection, etc., the length dimension is sufficient to arrange the plurality of terminal parts on one edge of the board. As the electronic components are mounted at a high density, it is necessary to arrange a large number of terminal portions, and it becomes difficult to reduce the substrate.

Therefore, a circuit is formed on a plurality of substrates, terminal portions are arranged on one edge of each substrate, and the substrates are stacked so that the terminal portions are arranged on the same edge portion to form a circuit structure. (For example, Patent Document 1). In this way, since the terminal portions are substantially arranged in a plurality of stages on one edge portion side of the substrate, the substrate can be made small.
Japanese Patent Laid-Open No. 2005-210804

However, the structure in which the substrate is multilayered as described above has a problem that the cost increases.
The present invention has been completed based on the above-described circumstances, and in a case where a plurality of terminal portions are projected together on one edge of a substrate, the substrate can be reduced in size without being multilayered. An object of the present invention is to provide a circuit structure and an electrical junction box capable of performing the above.

  The circuit structure of the present invention includes a plurality of first bus bars formed by punching a conductive plate, a substrate portion that integrally holds the plurality of first bus bars, and end portions of the plurality of first bus bars. Is assembled to the front side or the back side of the board part, and one end part of the first bus bar is one of the plurality of first bus bars. A plurality of second bus bars, the other end of which reaches one edge of the substrate portion, and the one terminal portion provided at the other end of the plurality of second bus bars. An intersection portion that is substantially orthogonal to the protruding direction of the other, and protruding from the intersection portion in the same direction as the protruding direction of the one terminal portion, and arranged in a plurality of stages with the one terminal portion group The other terminal portions with respect to the intersecting portion of the terminal group and the second bus bar. The outlet side characterized in that and a first displacement restricting portion along the opposite side.

  According to such a configuration, since one terminal portion group and another terminal portion group are arranged in a plurality of stages at one edge portion of the substrate portion, these terminal portion groups are arranged at one edge portion of the substrate portion. The board portion can be reduced in size as compared with the case where they are arranged in a line. Since the second bus bar is assembled on the front side or the back side of the board part, the terminal part group is arranged on one edge part of the board part, so that it is not necessary to make the board part multilayer. Therefore, in the case where a plurality of terminal portions are collectively projected at one edge portion of the substrate portion, the substrate portion can be reduced in size without being multilayered. Furthermore, since the first displacement restricting portion extends along the rising portion provided at the other end portion of the second bus bar, the other end portion of the second bus bar falls to the side opposite to the protruding direction of the other terminal portions. This can be prevented.

It is good also as what has a 2nd displacement control part along the protrusion side of the said other terminal part with respect to the said intersection part. Thereby, it can prevent that the other edge part of a 2nd bus-bar falls down in the protrusion direction of another terminal part.
It is good also as what has a holding member which hold | maintains the said 2nd bus bar integrally in the attitude | position assembled | attached to the said board | substrate part. Thereby, since a circuit structure can be manufactured by assembling a plurality of second bus bars at a time, it is possible to save time and effort for manufacturing compared to the case where the second bus bars are individually assembled.

The holding member may be provided at a position near the one end portion of the second bus bar, and the substrate portion may include a positioning portion that fits with the holding member. Thereby, since a holding member is positioned with respect to a board | substrate part, it can prevent that the edge part of the side connected to a 1st bus bar among 2nd bus bars is displaced.
The electrical junction box of the present invention is characterized by comprising the circuit structure and a casing for housing the circuit structure.

  According to the present invention, there is provided a circuit structure and an electrical junction box that can be reduced in size without making the substrate multi-layered, in which a plurality of terminal portions are collectively projected on one edge portion of the substrate. be able to.

<Embodiment 1>
Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS.
The electrical junction box P1 in the present embodiment is configured by housing the circuit component 10 in the casing 60, housed in a relay box (not shown), and installed in the engine room of the automobile. In the following, each component will be described with the left side in FIG. 2 as the left side and the right side as the right side, and the lower side in FIG. 3 (the side where the connector portion 61 of the casing 60 is provided) as the lower side and the upper side as the upper side. .

  The circuit structure 10 includes a plurality of first bus bars 30 that form a predetermined conductive path, a substrate portion 11 that integrally holds the first bus bars 30, a relay 12 that is connected to the first bus bar 30, and a resistance element 13. (Electronic parts). When the circuit structure 10 is viewed from the front and back directions, the overall shape is a rectangle that is long in the left-right direction (see FIG. 5).

  Six relays 12 and six resistance elements 13 are mounted on the circuit structure 10 (see FIG. 14). The relay 12 includes a main body 12A having a substantially rectangular parallelepiped shape and a plurality of terminals 12B provided on the back surface of the main body 12A. The terminal 12B of the relay 12 protrudes from the back surface of the main body 12A to the back side.

  The resistance element 13 has a main body 13A having a substantially cylindrical shape that is long in the axial direction, and a pair of terminals 13B extending from both ends in the longitudinal direction of the main body 13A. The terminal 12B of the relay 12 and the terminal 13B of the resistance element 13 are electrically connected by soldering or resistance welding to predetermined positions of the first bus bar 30, respectively.

  The six relays 12 are arranged in two upper and lower stages, and three relays 12 are arranged in each stage. Three of the six resistance elements 13 are arranged at a position directly above the relay 12 arranged in the upper stage in a posture in a lateral direction (a direction in which the axis extends in the left-right direction) along the upper edge of the board portion 11 (see FIG. 5). The other three resistance elements 13 are in a vertical orientation (in which the axis extends in the vertical direction), one on the left side (outside) of the leftmost relay 12 among the relays 12 arranged in the lower stage, and the right side Two adjacent relays 12 are disposed at the same height as the lower relay 12. That is, the relay 12 and the resistance element 13 are arranged in two upper and lower stages as a whole.

  The first bus bar 30 is formed by punching a metal plate excellent in conductivity (corresponding to the conductive plate of the present invention). The first bus bar 30 includes a first upper bus bar 30U embedded in a substantially upper half portion of the substrate portion 11 and a first lower bus bar 30S embedded in a substantially lower half portion of the substrate portion 11 (see FIG. 11). The first upper bus bar 30U is electrically connected to the relay 12 or the resistance element 13 mounted on the upper stage, and is electrically connected to a second bus bar 40 described later. The first lower bus bar 30S includes the lower bus bar 30S. The relay 12 or the resistance element 13 mounted on is electrically connected. The first upper bus bar 30U and the first lower bus bar 30S each have a shape that is long in the vertical direction, and are juxtaposed in the horizontal direction.

  In the first upper bus bar 30U and the first lower bus bar 30S, a connection hole 31 into which the terminals 12B and 13B of the components 12 and 13 are inserted is formed through the connection portion of the relay 12 or the resistance element 13. . In addition, a bus bar connection hole 32 into which the connection tab 40A of the second bus bar 40 is inserted is formed through the connection portion of the first upper bus bar 30U where the second bus bar 40 is connected. The bus bar connection hole 32 is formed at the lower end of the first upper bus bar 30U.

  The first lower bus bar 30S has a first terminal portion 33 that is electrically connected to an external terminal (not shown). The 1st terminal part 33 is arranged in the lower edge (one edge part of the board | substrate part 11) among the lower ends of the circuit structure 10, in other words, the periphery of the board | substrate part 11 (refer FIG. 4). The first terminal portion 33 protrudes downward along the plate surface of the substrate portion 11 from the lower edge portion of the substrate portion 11 (see FIG. 10). In addition, the 1st terminal part 33 corresponds to one terminal part of this invention.

  The substrate portion 11 is made of a thermoplastic resin (PBT, PPS, PEEK or the like), LCP, or a thermosetting resin (EP or the like), and is integrated with the plurality of first bus bars 30 by insert molding. The board portion 11 has a substantially rectangular thin plate shape that is long in the left-right direction in which the first bus bar 30 is embedded, and fills and insulates between the adjacent first bus bars 30 and covers the front and back surfaces of the first bus bar 30. ing. The first bus bar 30 is embedded at a substantially central position in the front and back direction of the substrate portion 11.

  A through-hole penetrating in the front and back direction at the connection portion of the relay 12, the resistance element 13 and the second bus bar 40, that is, at the position where the component connection hole 31 and the bus bar connection hole 32 of the first bus bar 30 are arranged in the board portion 11 14 is formed. Each through-hole 14 has a tapered shape in which the opening area gradually decreases from the front side and the back side of the substrate portion 11 toward the center (embedding position of the first bus bar 30).

  A first displacement restricting portion 15 that rises to the front side substantially perpendicular to the plate surface of the substrate portion 11 is provided at the lower edge portion of the substrate portion 11. The 1st displacement control part 15 comprises the wall shape which follows the lower end edge of the board | substrate part 11, and the height dimension of the front and back direction is made substantially constant over the left-right direction (refer FIG. 8). The lower surface of the first displacement restricting portion 15 is substantially perpendicular to the surface of the substrate portion 11, and is along the upper side of the intersecting portion 43 of the second bus bar 40 described later (the side opposite to the protruding side of the second terminal portion 44). Arranged. Moreover, the partition part 16 which partitions off between the adjacent 2nd bus bars 40 protrudes at the front side end of the 1st displacement control part 15 (refer FIG. 5). The first displacement restricting portion 15 is formed integrally with the substrate portion 11.

  The substrate portion 11 has a plurality of engaging portions 20 and 21 that engage with a holding member 50 described later. The engaging portions 20 and 21 will be described in detail after the holding member 50 is described.

  The circuit structure 10 includes a plurality of second bus bars 40 that are assembled on the front side of the substrate unit 11. Each second bus bar 40 is formed by punching a metal plate in the same manner as the first bus bar 30, and is a substantially intermediate position in the vertical direction of the board portion 11, in other words, a position immediately below the relay 12 mounted on the upper stage. The length of the relay 12 mounted on the lower stage extends downward and reaches the lower end of the board portion 11.

  A connection tab 40A connected to the first upper bus bar 30U is provided at the upper end (one end) of the second bus bar 40 (see FIG. 14). The connection tab 40A is inserted into the bus bar connection hole 32 of the first upper bus bar 30U through the through hole 14 of the board portion 11, and soldered to the first upper bus bar 30U (see FIG. 10).

  The second bus bar 40 has leg portions 41 that rise from the bus bar connection hole 32 substantially perpendicular to the first upper bus bar 30U. The leg portion 41 has a rising dimension at which the tip thereof reaches the front side with respect to the relay 12 arranged in the lower stage, in other words, has a rising dimension equivalent to that of the first displacement restricting portion 15.

  The second bus bar 40 includes a vertically extending portion 42 that extends downward from the rising end (front side end) of the leg portion 41 at a substantially right angle to the leg portion 41. The longitudinally extending portion 42 is substantially parallel to the plate surface of the substrate portion 11, and the lower end thereof reaches the lower surface of the first displacement restricting portion 15. The lower end portions of the longitudinally extending portions 42 are fitted into recesses formed between the partition portions 16 of the first displacement restricting portion 15.

  The second bus bar 40 is bent at a substantially right angle from the extending end (lower end) of the longitudinally extending portion 42 to the back side, and has an intersecting portion 43 along the lower surface of the first displacement regulating portion 15. The intersecting portion 43 is substantially orthogonal to the protruding direction of the first terminal portion 33. The intersecting portion 43 of any one of the plurality of second bus bars 40 has a length dimension that reaches the substrate portion 11, and the other intersecting portions 43 of the second bus bars 40 are first displacement regulating portions. 15 has a length that reaches approximately the center position in the front and back direction (see FIG. 10). The intersection 43 having a length reaching the substrate 11 is referred to as a first intersection 43A, and the other intersection 43 is referred to as a second intersection 43B. The back side end of the first intersecting portion 43A reaches a position aligned with the first terminal portion 33 in the left-right direction.

  The second bus bar 40 has a second terminal portion 44 (corresponding to another terminal portion of the present invention) that protrudes downward (in the same direction as the protruding direction of the first terminal portion 33) from the back side end of each intersection portion 43. is doing. The second terminal portion 44 provided at the back side end of the first intersecting portion 43A is arranged in line with the first terminal portion 33 group, and the second terminal portion 44 provided at the back side end of the second intersecting portion 43B. The first displacement restricting portion 15 is arranged at a substantially central position in the front and back direction and is arranged in a line in the left-right direction (see FIG. 8). That is, the first terminal portion 33 and the second terminal portion 44 are arranged in two stages on the front and back sides.

  The second terminal portions 44 arranged side by side with the first terminal portions 33 have substantially the same width as the first terminal portions 33 and are arranged at substantially equal pitches in the left-right direction. Among the second terminal portions 44 that are arranged in parallel on the front side, there are those having a large width dimension and those having a small width dimension, and those having a small width dimension have the same width dimension as the first terminal section 33. This difference in dimension is due to the value of the energization current, and all the second terminal portions 44 may have a width dimension equivalent to that of the first terminal portion 33.

  The circuit configuration body 10 includes a holding member 50 that integrally holds the plurality of second bus bars 40 in a posture in which the second bus bars 40 are assembled to the board portion 11. The holding member 50 is integrally formed with the second bus bar 40 by insert molding. The holding member 50 has a long and thin bar shape in the parallel direction of the second bus bar 40, and has a square cross section (see FIG. 10). The holding member 50 has a length dimension across all the second bus bars 40 and integrally holds all the second bus bars 40 assembled to one circuit component 10 (see FIGS. 4 and 5). .

  The holding member 50 connects the second bus bar 40 at three locations. Specifically, the holding member 50 includes a position of the leg portion 41 of the second bus bar 40 near the connection tab 40A (a position near one end), a substantially central position in the longitudinal direction of the longitudinally extending portion 42, and a longitudinally extending shape. The three holding members 50 are provided at a position near the lower end in the longitudinal direction of the portion 42 and have substantially the same shape as a whole (see FIG. 10). The holding member 50 provided on the leg 41 is provided at the upper holding member 50U, and the holding member 50 provided at the center position of the vertically extending portion 42 is provided at a position near the lower end of the intermediate holding member 50N and the vertically extending portion 42. The holding member 50 is referred to as a lower holding member 50S. In addition, this holding member 50 may be integrated when holding strength is required.

  A protrusion 51 is provided at a substantially central position in the longitudinal direction of the lower holding member 50S. The protrusion 51 has a shape that protrudes downward and rearward from the lower holding member 50S as a whole, and an engagement recess 51A into which an engagement wall described later can be fitted is formed on the back side (see FIG. 13). .

The substrate portion 11 has an upper engaging portion 20 (corresponding to the positioning portion of the present invention) that engages with the upper holding member 50U, and a lower engaging portion 21 that engages with the lower holding member 50S.
The upper stage engaging portion 20 is provided at a substantially center in the up-down direction of the substrate portion 11 and, as shown in FIG. 14, a pair of end support portions 20A disposed at both ends in the left-right direction of the substrate portion 11, and a pair of ends. The central support portion 20B is disposed between the support portions 20A.

  The pair of end support portions 20A are formed with fitting recesses 22 that are shaped so that the end portions of the upper holding member 50U can be fitted to each other and open in the opposite direction and the front direction, in other words, the end support portions. 20A has the enclosure part 23 distribute | arranged to the up-down and right-and-left of the both ends of the upper stage holding member 50U, and the base part 24 distribute | arranged to the back side of the upper stage holding member 50U. The upper holding member 50U is fitted to the end support portion 20A at both ends, so that the positional deviation in the vertical and horizontal directions and the back side is restricted, and the vertical and horizontal and front and back positions of the connection tab 40A of the second bus bar 40 are predetermined. Held in the position.

  The central support portion 20B has a pair of wall portions 25 that are substantially parallel and face vertically, and a groove portion 26 that is open in the left-right direction and the front direction is formed therebetween. By fitting the upper stage holding member 50U into the central support portion 20B, the upper stage holding member 50U is restricted from being displaced in the vertical direction even in the middle part, and all the connection tabs 40A are reliably held at predetermined positions.

  The lower engaging portion 21 is provided at a substantially central position in the left-right direction of the first displacement restricting portion 15. The lower engaging portion 21 includes a pair of opposing walls 27 that rise upward from the first displacement restricting portion 15, and an engaging piece 28 that rises to the front side between the opposing walls 27. Between the pair of opposing walls 27, the protruding portion 51 of the lower engaging portion 21 can be fitted, and the engaging piece 28 is engaged with the engaging recess 51A of the protruding portion 51. Thereby, the lower stage holding member 50 </ b> S is restricted from being displaced in the vertical and horizontal directions and the back side.

  The casing 60 that accommodates the circuit structure 10 is made of synthetic resin, and includes a lower case 60S that is assembled to the circuit structure 10 from below, and an upper case 60U that accommodates the circuit structure 10 inside and is assembled from above. (See FIGS. 15 and 16).

  The lower case 60S has a box shape that is long in the left-right direction as a whole. The lower case 60S has a connector part 61 that can be fitted to an external connector (not shown), and the connector part 61 has a hood part 62 that is formed in a substantially rectangular shape in the left-right direction and opens downward (see FIG. 2). ). Two hood parts 62 are juxtaposed on the left and right, and an insertion hole 63 into which the first terminal part 33 and the second terminal part 44 can be inserted is formed in two rows on the front and back sides of the rear wall 62A of each hood part 62. Yes. In each hood part 62, the 1st terminal part 33 and the 2nd terminal part 44 of the circuit structure 10 are arranged by protruding downward.

  When the lower case 60S is assembled to the circuit component 10, the rear wall 62A of the hood 62 is arranged to face the lower side of the first displacement restricting portion 15 of the circuit component 10 as shown in FIG. Are arranged along the lower surface of the intersecting portion 43 of the second bus bar 40 (the protruding side of the second terminal portion 44). That is, the rear wall 62A of the hood portion 62 corresponds to the second displacement restricting portion of the present invention.

  The upper case 60U has a flat box shape that can accommodate the circuit structure 10 therein and opens downward. A lock piece 65 that can be engaged with a lock protrusion 64 provided on the lower case 60S is provided at the lower end (opening end) of the upper case 60U. When the lock piece 65 and the lock projection 64 are engaged, the upper case 60U and the lower case 60S are held in the assembled state.

Next, the shapes of the first bus bar 30 and the second bus bar 40 when the metal plate is punched will be described.
As shown in FIG. 11, all the first bus bars 30 and the second bus bars 40 provided in one circuit structure 10 are connected to one frame 71 via tie bars 70. The frame 71 has a rectangular shape that is long in the left-right direction as a whole, and the first bus bar 30 and the second bus bar 40 are collectively formed in approximately half in the longitudinal direction of the frame 71.

  The first upper bus bar 30 </ b> U of the first bus bars 30 is connected to the upper frame portion 70 </ b> U of the frame 71 via the tie bars 70. In the first lower bus bar 30 </ b> S, the lower ends of the first terminal portions 33 arranged at a predetermined pitch are connected to the lower frame portion 70 </ b> S of the frame 71 through the tie bars 70.

  The second bus bars 40 are arranged in the left-right direction at the same pitch as when assembled to the board portion 11, and the upper end and the lower end are respectively connected to the upper frame portion 70 U and the lower frame portion 70 S of the frame 71 via the tie bars 70. .

Next, the manufacturing process of the electrical junction box P1 configured as described above will be described with reference to FIGS.
First, a metal plate is punched to form a shape in which the first bus bar 30 and the second bus bar 40 are connected to one frame 71 (see FIG. 11). Next, the substrate portion 11 and the holding member 50 are simultaneously insert-molded, and the first bus bar 30 group and the second bus bar 40 group are integrated with the substrate portion 11 and the holding member 50, respectively (see FIG. 12). Next, the frame 71 is separated from the first bus bar 30 and the second bus bar 40, and the second bus bar 40 group that is integrally held by the holding member 50 and the first bus bar 30 group that is integrally held by the board portion 11. Separate. Then, the second bus bar 40 is bent at three locations to form a shape including the leg portion 41, the longitudinally extending portion 42, the intersecting portion 43, and the second terminal portion 44 (see FIG. 14).

  Thereafter, the relay 12 and the resistance element 13 are placed at predetermined positions, the second bus bar 40 group is assembled at a predetermined position from the front side, and the flow solder tank heated to the melting temperature from the back side of the mounting surface of the substrate part 11 is placed. The relay 12, the resistance element 13, and the second bus bar 40 are soldered to the first bus bar 30 by being attached and then cooled. Note that lead-free solder is used.

  The circuit structure 10 thus manufactured is assembled in the lower case 60S in a vertical direction (the direction in which the first terminal portion 33 and the second terminal portion 44 protrude downward) (see FIG. 15). Then, as shown in FIG. 16, when the upper case 60U is assembled to the lower case 60S, the manufacture of the electrical junction box P1 is completed.

Next, operations and effects of the first embodiment configured as described above will be described.
In the electrical junction box P1, since the first terminal portion 33 group and the second terminal portion 44 group are arranged in two stages at the lower edge portion of the substrate portion 11, the first terminal portion 33 group and the second terminal portion group 2 The board part 11 can be reduced in size compared with the case where the terminal part 44 group is arranged in a row at the lower edge part of the board part 11. Since the second bus bar 40 is assembled on the front side of the substrate unit 11 and the second terminal unit 44 group is arranged at the lower edge of the substrate unit 11, there is no need to multilayer the substrate unit 11. Therefore, even in the case where the plurality of terminals 12B are collectively projected on the lower edge portion of the substrate portion 11, the substrate portion 11 can be reduced in size without being multilayered.

  Furthermore, since the first displacement restricting portion 15 extends along the intersecting portion 43 provided at the lower end portion of the second bus bar 40, the intersecting portion 43 of the second bus bar 40 includes, for example, the external terminal 12B and the second terminal portion 44. It is possible to prevent the body from falling to the upper side (the side opposite to the protruding direction of the second terminal portion 44) due to the force at the time of connection.

  Further, since the inner wall 62A of the hood portion 62 of the lower case 60S extends along the intersecting portion 43 of the second bus bar 40 from the side opposite to the first displacement restricting portion 15, the intersecting portion 43 of the second bus bar 40 is on the lower side (first It is possible to prevent the two terminal portions 44 from falling down. That is, it is possible to prevent the intersection 43 of the second bus bar 40 from being displaced due to the attachment / detachment of the external connector.

  Then, when the circuit structure 10 is oriented vertically, that is, when the electrical connection box P1 is accommodated in the relay box with the connector portion 61 facing downward, the electrical connection box is placed horizontally (direction in which the board portion is horizontal). Compared with the case where the electrical connection box P1 is housed in the relay box, the horizontal area occupied by the electrical junction box P1 in the relay box can be reduced. Therefore, the area occupied in the horizontal direction of the relay box can be reduced accordingly, and the space in the height direction of the engine room can be used effectively.

  In addition, since the holding member 50 that integrally holds the plurality of second bus bars 40 in a posture to be assembled to the substrate unit 11 is provided, the plurality of second bus bars 40 are assembled to the substrate unit 11 at a time to form a circuit. The structure 10 can be manufactured. Therefore, compared with the case where the 2nd bus bar 40 is assembled | attached separately, the effort concerning manufacture of the circuit structure 10 can be saved.

  Further, among the plurality of holding members 50, the upper holding member 50U is provided at a position near the connection tab 40A of the second bus bar 40, and the board portion 11 has the upper engaging portion 20 that fits with the upper holding member 50U. is doing. As a result, the upper holding member 50U is positioned with respect to the board portion 11, and thus the connection tab 40A can be prevented from being displaced, and the second bus bar 40 is securely soldered to a predetermined position of the first bus bar 30. Can do.

  Further, a plurality of first bus bars 30 and a plurality of second bus bars 40 are punched into a shape connected to one frame 71 to hold the second bus bar 40 together, and the first bus bar 30 The substrate portion 11 that is integrally held is simultaneously insert-molded. Thereby, compared with the case where the board | substrate part 11 and the holding member 50 are insert-molded separately, the effort concerning manufacture can be saved and the circuit structure 10 can be manufactured easily.

<Embodiment 2>
Next, an electrical junction box P2 according to Embodiment 2 of the present invention will be described with reference to FIGS.
The electrical junction box P2 of the present embodiment is different from the first embodiment in that the second displacement restricting portion 85S is provided in the circuit configuration body 80. In addition, the same code | symbol is attached | subjected to the structure similar to Embodiment 1, and the overlapping description is abbreviate | omitted.

  As in the first embodiment, the circuit configuration body 80 according to the present embodiment includes a plurality of first bus bars 81 that form a predetermined conductive path, a substrate portion 82 that integrally holds the first bus bars 81, and a first The relay 12 and the resistance element 13 connected to the bus bar 81 are provided.

  Eight relays 12 and one resistive element 13 are mounted on the circuit structure 80 (see FIG. 23). The eight relays 12 are arranged in two upper and lower stages, and four relays 12 are arranged in each stage. The upper relay 12 and the lower relay 12 are arranged in a straight line vertically and horizontally.

  Eight resistive elements 13 are arranged four each above the upper relay 12 and immediately above the lower relay 12, all in a horizontal orientation (the axis extends in the left-right direction) and straight in the left-right direction. It is arranged in a shape. Moreover, each resistance element 13 exists in the position right above each relay 12, and the relay 12 and the resistance element 13 are arranged in a line in the up-down direction.

  As in the first embodiment, the board portion 82 has a substantially rectangular thin plate shape in which the first bus bar 81 is embedded, and penetrates in the front and back direction at the position of the component connection hole 31 and the bus bar connection hole 32 of the first bus bar 81. A through-hole 14 is formed.

  The first bus bar 81 is formed by punching a metal plate having excellent conductivity, and includes a first upper bus bar 81U and a first lower bus bar 81S as in the first embodiment (see FIG. 26). Component connection holes 31 are formed through the first upper bus bar 81U and the first lower bus bar 81S, respectively. The first upper bus bar 81U has a bus bar connection hole 32 formed therethrough, and the bus bar connection holes 32 are formed on the left and right sides of the component connection hole 31 of each first upper bus bar 81U.

  As in the first embodiment, the first lower bus bar 81S includes a first terminal portion 83 that is electrically connected to an external terminal (not shown). The first terminal portion 83 is arranged on the lower edge portion of the substrate portion 82. The first lower bus bar 81S has a rising portion 84 that rises from the base plate portion 82 at a substantially right angle to the front side, and the first terminal portion 83 protrudes downward at a substantially right angle from the front side end of the rising portion 84. (See FIG. 21).

  A lower wall portion 85 that rises to the front side substantially perpendicular to the plate surface of the substrate portion 82 is provided at the lower edge portion of the substrate portion 82. The rising portion 84 of the first lower bus bar 81 </ b> S is embedded in the lower wall portion 85, and the first terminal portion 83 protrudes downward from a substantially intermediate position in the front and back direction of the lower wall portion 85. The lower wall portion 85 forms a wall shape along the lower edge of the substrate portion 82 and is formed integrally with the substrate portion 82, and the height dimension in the front and back direction is substantially constant in the left-right direction (see FIG. 24). .

  The board part 82 has a bus bar assembly part 86 to which the second bus bar 90 is assembled. The bus bar assembling portion 86 will be described in detail after the second bus bar 90 is described.

  A total of 16 second bus bars 90 are provided, two on the side of each relay 12. Similarly to the first embodiment, each second bus bar 90 is formed by punching a metal plate, and has a length dimension that reaches the lower end of the board portion 82 from the upper edge of the board portion 82 through the side of the relay 12. (See FIG. 22). A tab connection portion 91 connected to the first upper bus bar 81U is provided at the upper end portion of each second bus bar 90, and a second terminal portion 92 is provided at the lower end portion (see FIG. 29).

  The two second bus bars 90 arranged on the sides of the relay 12 are arranged in the front and back direction (see FIG. 25). The second bus bar 90 disposed on the front side is referred to as a second front side bus bar 90A, and the second bus bar 90 disposed on the back side is referred to as a second back side bus bar 90B.

  As shown in FIG. 29, the second front-side bus bar 90A has a leg portion 93 that rises substantially perpendicular to the first upper bus bar 81U (substrate portion 11), and a lower portion from the rising end (front-side end) of the leg portion 93. A vertically extending portion 94 extending to the left, a crossing portion 95 extending leftward and rightward from the lower end of the vertically extending portion 94, and a second terminal portion 92 projecting downward from the end of the crossing portion 95. . The portion of the second front bus bar 90A excluding the second terminal portion 92 is slightly smaller than the width dimension of the second terminal portion 92 over the entire length.

  The second back-side bus bar 90B has two tab connecting portions 91 each. The second back side bus bar 90B extends vertically from the upper end where the tab connecting portion 91 is provided, and extends to the left and right from the lower end of the vertically extended portion 94, and then rises to the front side. The crossing portion 95 has a shape, and the second terminal portion 92 protrudes downward from the tip of the crossing portion 95. The rising dimension to the front side of the intersecting portion 95 of the second back side bus bar 90B is equal to the rising dimension of the leg portion 93 of the second front side bus bar 90A. The portion of the second back side bus bar 90B excluding the second terminal portion 92 is slightly larger than the width dimension of the second terminal portion 92 over the entire length.

  The second terminal portion 92 of the second front side bus bar 90A and the second terminal portion 92 of the second back side bus bar 90B are arranged on the front side end of the lower wall portion 85 and are juxtaposed in the left-right direction. The two terminal portions 92 are arranged in two steps on the front and back sides. The width dimension of the second terminal portion 92 is substantially the same as the width dimension of the first terminal portion 83, and the parallel pitch is also substantially the same, and the terminal portions 83, 92 overlap each other in the front-back direction.

  As shown in FIG. 22, the bus bar assembling portion 86 has an upper assembling portion 86U to which the vertically extending portion 94 of the second front side bus bar 90A is assembled and a middle step assembling to which the vertically extending portion 94 of the second back side bus bar 90B is assembled. 86N and the lower assembly | attachment part 86S to which the cross | intersection part 95 of 2nd front side bus-bar 90A and 2nd back side bus-bar 90B is assembled | attached.

  The upper assembly portion 86U is provided on the left and right sides of the upper relay 12 in the board portion 82, and the middle assembly portion 86N is provided on the left and right sides of the lower resistance element 13. The upper assembly portion 86U and the middle assembly portion 86N as a whole have a block shape protruding upward from the substrate portion 82, and the upper assembly portion 86U has a projecting dimension about twice as large as that of the middle assembly portion 86N. (See FIG. 25). In addition, the bus-bar connection hole 32 is formed in the upper position of each upper assembly | attachment part 86U, and the position between the upper assembly | attachment part 86U and the middle assembly | attachment part 86N (refer FIG. 23).

  The upper assembly portion 86U and the middle assembly portion 86N are each formed with an assembly groove 87 that is open to the front side in a straight line. The vertically extending portion 94 of the second front bus bar 90A is inserted into the assembly groove 87 of the upper assembly portion 86U, and the longitudinal extension portion 94 of the second back bus bar 90B is inserted into the assembly groove 87 of the middle assembly portion 86N. Is inserted. The second bus bar 90 is inserted into each assembly groove 87, whereby positioning in the left-right direction and front-back direction is performed, and each tab connecting portion 91 is held at a predetermined position.

  The lower assembly portion 86 </ b> S is formed in the lower wall portion 85. An assembly groove 87 that is open to the front side is formed in the lower assembly section 86S, and the assembly groove 87 can be inserted into the lower ends of the longitudinally extending portions 94 of the second front bus bar 90A and the second back bus bar 90B. The vertical groove portion 87T and the horizontal groove portion 87Y into which the intersecting portion 95 can be inserted. The upper wall surface (upper wall surface 85U) and the lower wall surface (lower wall surface 85S) of the lateral groove portion 87Y are the first displacement restriction portion and the second displacement restriction portion along the upper surface and the lower surface of the intersecting portion 95 of the second bus bar 90. Constitute. A partition portion 88 that partitions between the adjacent second terminal portions 92 is provided at the front side end of the lower wall portion 85 below the lateral groove portion 87Y.

  As in the first embodiment, the casing 100 that houses the circuit structure 80 includes a lower case 100S that is assembled to the circuit structure 80 from below, and an upper case 100U that houses the circuit structure 80 and is assembled from above. (See FIG. 18). The lower case 100 </ b> S has a connector part 101, and the connector part 101 has a single hood part 102. In this hood part 102, the 1st terminal part 83 and the 2nd terminal part 92 of the circuit structure 80 are arrange | positioned protruding downward. When the lower case 100S is assembled to the circuit structure 80, the back wall 102A of the hood portion 102 is arranged along the lower surface of the lower wall portion 85 (see FIG. 21). As in the first embodiment, the upper case 100U and the lower case 100S are held in the assembled state by engaging the lock pieces 103 provided on the upper case 100U with the lock protrusions 104 provided on the lower case 100S.

Next, the manufacturing process of the electrical junction box P2 configured as described above will be described.
First, a metal plate is punched to form a first bus bar 81 connected to the frame 71 via a tie bar 70. Then, the first bus bar 81 is bent at three locations to have a shape including the rising portion 84 and the first terminal portion 83 (see FIG. 26).

  Next, after insert-molding the board | substrate part 82 and integrating the 1st bus-bar 81 group (refer FIG. 27), the flame | frame 71 is cut away. Further, the metal plate is pressed to form the second bus bar 90 having a predetermined shape.

  Thereafter, as shown in FIG. 28, the relay 12 and the resistance element 13 are placed at predetermined positions, and as shown in FIG. 29, the second bus bars 90 are respectively assembled in the assembling grooves 87, and the mounting surface of the board portion 82 is mounted. From the back side, the relay 12, the resistance element 13, and the second bus bar 90 are soldered to the first bus bar 81 by being put on a flow solder bath heated to the melting temperature and then cooled.

  After the circuit structure 80 manufactured in this way is assembled to the lower case 100S as in the first embodiment, the assembly of the electrical junction box P2 is completed when the upper case 100U is assembled.

  As described above, in the electrical junction box P2 of the present embodiment, as in the first embodiment, the first terminal portion 83 group and the second terminal portion 92 group are arranged in two stages at the lower edge portion of the substrate portion 82. Therefore, the board portion 82 can be reduced in size as compared with the case where the first terminal portion 83 group and the second terminal portion 92 group are arranged in a row at the lower edge portion of the board portion 82. Then, by assembling the second bus bar 90 on the front side of the substrate portion 82, the second terminal portion 92 group is collectively arranged on the lower edge portion of the substrate portion 82, so that the substrate portion 82 does not need to be multilayered. Therefore, even in the case where the plurality of terminal portions 83 and 92 are collectively projected on the lower edge portion of the substrate portion 82, as in the first embodiment, the substrate portion 82 can be reduced in size without being multilayered. .

  Further, since the upper wall surface 85U of the horizontal groove portion 87Y and the lower wall surface 85S of the horizontal groove portion 87Y formed in the lower wall portion 85 are along the intersecting portion 95 provided at the lower end portion of the second bus bar 90, the circuit structure 80 is provided. Even in a single unit before being assembled to the casing 100, the vertical collapse of the intersecting portion 95 of the second bus bar 90 can be prevented.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.

(1) In the first embodiment, the holding member 50 integrally holds all the second bus bars 40 assembled to one circuit component 10, but is not limited to this and is held in several groups. May be.
(2) In the above embodiment, the terminal portions 33 and 44 (83, 92) are arranged in two stages on the front and back sides, but the present invention is not limited to this and may be arranged in three or more stages.

1 is an external perspective view of an electrical junction box according to Embodiment 1. FIG. Bottom view Same longitudinal section External perspective view of circuit structure Same surface Same side view Top view Bottom view Side view Same longitudinal section Perspective view showing a state of punching a metal plate The perspective view showing the state which insert-molded the board | substrate part and the holding member. Side view The perspective view showing the state before mounting an electronic component and the 2nd bus bar The perspective view showing the state before assembling a circuit structure and a lower case A perspective view showing a state before assembling the upper case External perspective view of electrical junction box according to Embodiment 2 Exploded perspective view Bottom view Cross section Same longitudinal section External perspective view of circuit structure Same surface Bottom view Side view A perspective view showing a state where the punched first bus bar is bent The perspective view showing the state which carried out insert molding of the substrate part The perspective view showing the state before mounting electronic parts The perspective view showing the state before attaching a 2nd bus bar.

Explanation of symbols

P1, P2 ... Electric junction box 10, 80 ... Circuit structure 11, 82 ... Substrate part 15, 85U ... First displacement restricting part 20 ... Upper stage engaging part (positioning part)
30, 81 ... 1st bus bar 33, 83 ... 1st terminal part (one terminal part)
40, 90 ... second bus bar 43, 95 ... intersection 44, 92 ... second terminal part (other terminal part)
50 ... Holding member 60, 100 ... Casing 62A, 85S ... Second displacement restricting portion

Claims (5)

A plurality of first bus bars formed by punching a conductive plate;
A substrate portion for integrally holding the plurality of first bus bars;
One terminal portion group in which end portions of the plurality of first bus bars protrude from one edge portion of the substrate portion;
It is assembled to the front side or the back side of the substrate part, one end is connected to one of the plurality of first bus bars, and the other end is one edge of the substrate part A plurality of second busbars reaching,
An intersecting portion that is provided at the other end of the plurality of second bus bars and that is substantially orthogonal to the projecting direction of the one terminal portion, and a projecting direction of the one terminal portion from the intersecting portion. Projecting in the same direction, the other terminal portion group arranged in a plurality of stages with the one terminal portion group,
A circuit configuration body comprising: a first displacement restricting portion along a side opposite to a protruding side of the other terminal portion with respect to an intersecting portion of the second bus bar. The circuit structure according to claim 1, further comprising a second displacement restricting portion along a protruding side of the other terminal portion with respect to the intersecting portion. 3. The circuit structure according to claim 1, further comprising a holding member that integrally holds the plurality of second bus bars in a posture to be assembled to the board portion. 4. The circuit according to claim 3, wherein the holding member is provided at a position near the one end portion of the second bus bar, and the substrate portion has a positioning portion that fits with the holding member. Construct. A circuit structure according to any one of claims 1 to 4,
An electrical junction box comprising a casing for housing the circuit component.

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