JP5460634B2 - Substrate arrangement structure - Google Patents

Description

  The present invention relates to a substrate arrangement structure in which a plurality of substrates are juxtaposed so as to be stacked at a predetermined interval in a juxtaposed direction orthogonal to the planar direction of the substrates.

  In general, an electrical connection box mounted on an automobile or the like contains a board on which a plurality of circuit elements are mounted, but from the fact that the circuit has become complicated due to an increase in in-vehicle electrical components, etc. The number of circuit elements and conductors on the substrate has increased, and as a result, there has been a problem that the substrate is enlarged in the planar direction.

  Therefore, conventionally, it has been proposed to divide a circuit into a plurality of circuits and to arrange a plurality of substrates in parallel so as to overlap each other in a parallel arrangement direction orthogonal to the planar direction of the substrates. (See Patent Documents 1 and 2 below).

  Among them, in Patent Document 1 below, a bus bar is used as a conductor disposed on a substrate in order to cope with a large current circuit, and a distance is maintained between two adjacent substrates to maintain the distance between them. Spacers are provided as members.

  However, in Patent Document 1 below, since the plane of the bus bar extends in the plane direction of the substrate, it is necessary to secure a large space for arranging the bus bar on the substrate, and as a result, the size of the substrate is increased. I was invited.

  Further, in Patent Document 1 below, since a bus bar and a spacer are separately required, there is a problem that the number of parts is increased.

  On the other hand, in Patent Document 2 described below, a conductive pin is provided between two adjacent substrates, and the conductive pin functions as an inter-substrate connection terminal for connecting the substrates to each other and holds an interval between the substrates. It also functions as a holding member.

  However, in the following Patent Document 2, since the interval between the substrates is held by the rod-shaped conductive pins, the interval between the substrates can be held only at a part where the conductive pins are disposed, and the entire holding force is insufficient. There was a risk of becoming.

JP 2009-26464 A JP 2007-209146 A

  It is an object of the present invention to provide a board arrangement structure that can reliably maintain a gap between adjacent boards while suppressing an increase in the size of the board and an increase in the number of components.

The present invention provides a substrate arrangement structure in which a plurality of substrates are arranged side by side so as to overlap each other in a parallel arrangement direction orthogonal to the planar direction of the substrate, with a predetermined interval as a conductor. the bus bar is extended in the planar direction of the substrate in a state where the plane of the bus bar is erected so as to extend in the arrangement direction are disposed at both ends of the arrangement direction of the bus bar, the substrate and the abutment Then, the substrate holding structure is provided with an interval holding portion for holding the predetermined interval and a connection terminal portion for connecting circuits of the adjacent substrates along the planar direction of the substrate.

  According to the present invention, an interval between adjacent substrates can be reliably maintained while suppressing an increase in the size of the substrate and the increase in the number of components.

For more information, arranged to extend in the planar direction of the substrate by erected bus bus bar as a conductor for energizing the various components mounted on the base plate to the substrate, by providing the interval holding unit in the bus bar, the substrate The relative positions in the juxtaposed direction can be held over a wide range in the planar direction. For this reason, the said predetermined space | interval can be hold | maintained more reliably.

  Furthermore, an increase in the number of parts can be suppressed by having the bus bar also have a function of maintaining the predetermined interval.

Then, by standing the bus bars so that plane extending in the arrangement direction, compared with the case of when extended in the planar direction of the substrate in a state where the plane of the bus bar parallel to the plane of the substrate, a bus bar on a substrate A space required for disposition can be reduced, and an increase in the size of the substrate can be suppressed.

In addition, since the connection terminal portion is provided together with the interval holding portion, it is possible to reduce the number of inter-board connection terminals, and consequently to reduce the number of parts of the entire board arrangement structure.

An embodiment of the present invention, the interval holding unit, a plurality at both ends of the arrangement direction of the bus bar can Rukoto provided in projected state.

As an aspect of the present invention, the bus bars can be arranged so as to extend in directions intersecting each other in the planar direction of the substrate .

  According to this aspect, even when a load is applied to the substrate from the outside, it is possible to reliably suppress the deformation of the bus bar and to hold the predetermined interval more reliably.

  Specifically, when the bus bar which is a flat plate member is erected, the bus bar becomes relatively vulnerable to a load in a direction intersecting the plane. Therefore, when the above-described load is applied to the substrate from the outside, the bus bar may be greatly deformed by tilting or the like, and the predetermined interval may not be maintained.

  Therefore, the bus bars are arranged so as to extend in directions intersecting with each other in the planar direction. As a result, when a load is applied to the substrate from the intersecting direction, a portion extending in a different direction from a portion vulnerable to the load can exhibit high rigidity, thereby deforming the bus bar. Can be suppressed.

  Therefore, even if a load is applied to the substrate from the outside, it is possible to reliably suppress the deformation of the bus bar and hold the predetermined interval more reliably.

  In addition, in this invention, arrange | positioning so that a bus bar may be extended in the direction which mutually cross | intersects, when arrange | positioning so that several bus bars may be extended in the direction which mutually cross | intersect, by bending one bus bar, The case where it is arranged so as to extend in directions crossing each other is also included.

  According to the present invention, it is possible to provide a substrate arrangement structure that can reliably maintain the interval between adjacent substrates while suppressing an increase in the size of the substrate and the increase in the number of components.

The perspective view which shows the board | substrate arrangement | positioning structure which concerns on embodiment of this invention. The disassembled perspective view which shows a board | substrate arrangement | positioning structure. The fragmentary sectional view which shows the principal part of a board | substrate arrangement | positioning structure. The front view which shows a bus bar.

  As shown in FIGS. 1 to 4, the substrate arrangement structure according to the embodiment of the present invention includes a plurality of (here, two) substrates 1 </ b> A and 1 </ b> B in a planar direction (x direction, y) of the substrates 1 </ b> A and 1 </ b> B. The bus bars 8 are arranged in parallel so as to overlap each other in a parallel direction (z direction) perpendicular to the direction), and between the adjacent substrates 1A and 1B so that a plane extends in the z direction. 10 are provided, and the bus bars 8 to 10 are provided with interval holding portions 8a to 10a that hold the predetermined intervals by contacting the bus bars 8 to 10 with the substrates 1A and 1B at both ends in the z direction.

  The bus bars 8 to 10 are provided with connection terminal portions 8b to 10b for connecting the circuits of the adjacent substrates 1A and 1B to each other.

  Further, the bus bars 8 and 9 are arranged so as to extend in two directions (x direction and y direction) intersecting (orthogonal) with each other in the plane direction, and the bus bar 10 is formed in an L shape in a plan view. Thus, the one side 10A and the other side 10B are arranged so as to extend in two directions (x direction and y direction) that intersect (orthogonal) each other.

The configuration of the above-described substrate arrangement structure will be described in detail with reference to FIGS.
1 to 3 are a perspective view and an exploded perspective view, respectively, showing a substrate arrangement structure, FIG. 3 is a partial cross-sectional view showing a main part, and FIG. 4 is a front view showing a bus bar.

  The board arrangement structure according to the present embodiment can be applied to, for example, an electric connection box (not shown) mounted on an automobile or the like, and mainly includes a plurality of circuit elements 2 constituting a circuit inside the electric connection box. 1A, 2B, 2nd substrate 1B on which circuit elements 3, 3,... (See FIG. 2) are mounted, flat terminals 4, 5, tuning fork terminals 6, and rods. It is comprised with the terminal 7 and the bus-bars 8-10.

  In this embodiment, as shown in FIGS. 1 to 3, the two substrates 1 </ b> A and 1 </ b> B are separated from each other by a predetermined interval in the z direction orthogonal to the planar direction (x direction, y direction) of the substrates 1 </ b> A and 1 </ b> B. They are arranged side by side so that the circuit inside the electric junction box is divided into two layers.

In addition to mounting circuit elements 2, 2,..., A plurality of flat terminals 4, 4,... And tuning fork terminals 6, 6,. This constitutes a circuit.
The tuning fork-shaped terminal 6 has a cut at the center of its tip, and a mating terminal (not shown) is inserted into the cut and the pin is sandwiched by the tuning-fork terminal 6 so that both It can be connected.

  On the other hand, in addition to mounting circuit elements 3, 3,..., A plurality of flat terminals 5, 5,... Are arranged on the substrate 1B, and a circuit is configured by connecting them. .

  In this embodiment, rod-shaped terminals 7, 7,... And bus bars 8 to 10 are disposed between the substrates 1A and 1B.

  Here, the rod-shaped terminals 7, 7,... Are erected so that the longitudinal direction thereof is in the z direction, both ends penetrate the substrates 1A and 1B, respectively, and the circuits of both the substrates 1A and 1B are connected to each other. doing.

  The bus bars 8 to 10 are erected so that the plane extends in the z direction between the substrates 1A and 1B, and a plurality of interval holding portions 8a to 10a and a plurality of connection terminals are provided at both ends in the z direction. Parts 8b to 10b are provided.

  The bus bar 8 extends in a straight line in the x direction, and as shown in FIGS. 1 to 4, a plurality of interval holding portions 8 a that protrude outward from the other at both ends in the z direction, and the interval holding portions. A plurality of connection terminal portions 8b projecting further outward than 8a are integrally formed.

  As shown in FIG. 3, the plurality of interval holding portions 8a are in contact with the substrates 1A and 1B at both end portions in the z direction, thereby holding the predetermined interval between the substrates 1A and 1B.

  As shown in FIGS. 1 and 3, the plurality of connection terminal portions 8b penetrate the substrates 1A and 1B, respectively, and the circuits of both the substrates 1A and 1B are connected to each other by the connection terminal portions 8b. .

  The bus bar 9 extends in a straight line in the y direction orthogonal to the x direction, and as shown in FIGS. 1 and 2, a plurality of interval holding portions projecting outward from the other at both ends in the z direction. 9a and a plurality of connection terminal portions 9b that protrude further outward than the interval holding portion 9a are integrally formed.

  The plurality of interval holding portions 9a are in contact with the substrates 1A and 1B at both ends in the z direction, thereby holding the predetermined interval between the substrates 1A and 1B.

  The plurality of connection terminal portions 9b penetrate the substrates 1A and 1B, respectively, and the circuits of both the substrates 1A and 1B are connected to each other by the connection terminal portions 9b.

  Further, the bus bar 10 is formed by bending one bus bar so as to form an L shape in a plan view. As shown in FIG. 2, one side 10A and the other side 10B in the plane direction are each in the x direction. , Extending in the y direction. In the bus bar 10, on one side 10A, a plurality of interval holding portions 10a protruding outward from the other at both ends in the z direction, and a connection terminal portion 10b protruding further outward than the interval holding portion 10a. And are integrally molded. On the other hand, only the connection terminal portion 10b is integrally formed on the other side 10B.

  The plurality of interval holding portions 10a are in contact with the substrates 1A and 1B at both ends in the z direction, thereby holding the predetermined interval between the substrates 1A and 1B.

  The plurality of connection terminal portions 10b penetrate the substrates 1A and 1B, respectively, and the circuits of both the substrates 1A and 1B are connected to each other by the connection terminal portions 10b.

  By the way, since the bus bars 8 to 10 originally have a function as a conductor for energizing various mounting components (circuit elements 2, 3 and the like) on the boards 1A and 1B, on the boards 1A and 1B, The bus bars 8 to 10 are arranged so as to stretch over a wide range in the plane direction. Therefore, as in this embodiment, the bus bars 8 to 10 are erected with respect to the substrates 1A and 1B, and the bus bars 8 to 10 are provided with the interval holding portions 8a to 10a. The relative position can be maintained over a wide range in the planar direction. For this reason, the said predetermined space | interval can be hold | maintained more reliably.

  Furthermore, the bus bars 8 to 10 can also suppress the increase in the number of parts by having the function of holding the predetermined interval.

  In the present embodiment, as described above, the bus bars 8 to 10 are erected so that the plane extends in the z direction, so that the board 1A, the plane of the bus bar extends in the plane direction. The space required for arranging the bus bars 8 to 10 on 1B can be reduced. For this reason, the enlargement of the substrates 1A and 1B can be suppressed.

  In addition, by providing the connection terminal portions 8b to 10b for connecting the circuits of the adjacent substrates 1A and 1B with the bus bars 8 to 10, it is possible to reduce the number of connection terminals between the substrates. The total number of parts can be reduced.

  By the way, in this embodiment, the bus bar 8 extending in the x direction and the one side 10A of the bus bar 10 are relatively vulnerable to the load in the y direction by causing the bus bars 8 to 10 that are flat members to stand. On the other hand, the bus bar 9 extending in the y direction and the other side 10B of the bus bar 10 are relatively vulnerable to a load in the x direction. Therefore, when the above-described load is applied to the substrates 1A and 1B from the outside, the bus bars 8 to 10 may be greatly deformed by tilting or the like, and the predetermined interval may not be maintained.

  Therefore, in the present embodiment, the bus bars 8 and 9 are disposed so as to extend in the x direction and the y direction that intersect (orthogonal) each other in the planar direction, and the bus bar 10 is formed in an L shape in a plan view. By molding, the one side 10A and the other side 10B are disposed so as to extend in the x and y directions that intersect (orthogonal) each other.

  Accordingly, for example, when a load is applied to the substrates 1A and 1B from the x direction, the bus bar 8 extending in the x direction and the one side 10A of the bus bar 10 can exhibit high rigidity. It can suppress that the other side 10B of the bus-bar 10 deform | transforms. On the other hand, when a load is applied to the substrates 1A and 1B from the y direction, the bus bar 9 extending in the y direction and the other side 10B of the bus bar 10 can exhibit high rigidity, whereby the bus bar 8 and the bus bar 10 The deformation of the one side 10A can be suppressed.

  Therefore, even if a load is applied to the substrates 1A and 1B from the outside, the deformation of the bus bars 8 to 10 can be reliably suppressed and the predetermined interval can be more reliably maintained.

  In the above-described embodiment, in the bus bars 8 to 10, the interval holding portions 8 a to 10 a are formed by portions protruding outward from the others, but the present invention is not necessarily limited to this. For example, the entire end portions may function as the interval holding portions without forming the protruding portions at the both end portions of the bus bars 8-10.

  1 to 4, the bus bars 8 to 10 are in an upright state in the z direction. However, the present invention is not necessarily limited to this, and the bus bars are arranged to extend obliquely with respect to the z direction. Alternatively, a configuration in which a part of the bus bar is bent so that an intermediate portion of the bus bar extends obliquely with respect to the z direction may be used.

  In the present invention, the bus bars need only be disposed so as to extend at least in the direction intersecting each other, and may not be disposed so as to extend in two directions orthogonal to each other as described above.

  Further, as described above, the bus bar is not necessarily limited to the one that is formed in a straight line shape or an L shape in a plan view. For example, a T-shaped, U-shaped, cross-shaped or the like molded in a plan view may be used, and further, a molded one that is complicatedly branched over a wide range in the plane direction of the substrate may be used. Good.

  In the above-described embodiment, the case where two substrates 1A and 1B are arranged in parallel in the z direction has been described. However, the present invention may be applied to a structure in which three or more substrates are arranged in parallel.

1A, 1B ... Boards 8, 9, 10 ... Busbars 8a, 9a, 10a ... Spacing holding parts 8b, 9b, 10b ... Connection terminal parts

Claims (3)

A substrate arrangement structure in which a plurality of substrates are juxtaposed so as to overlap each other in a juxtaposed direction perpendicular to the planar direction of the substrate,
Between adjacent boards , a bus bar as a conductor is disposed so as to extend in the plane direction of the board in a state where the plane of the bus bar extends so as to extend in the parallel direction,
At both ends of the arrangement direction of the bus bar, and the space holding portion for holding said predetermined distance said substrate abutting to the connection terminal portion for connecting the circuit to each other of the substrate adjacent the planar direction of the substrate The board | substrate arrangement | positioning structure provided along . The substrate arrangement structure according to claim 1, wherein a plurality of the interval holding portions are provided in a protruding state at both end portions in the parallel arrangement direction of the bus bars . The board | substrate arrangement | positioning structure of Claim 1 or 2 arrange | positioned so that the said bus-bar may extend in the direction which mutually cross | intersects in the planar direction of the said board | substrate.

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