JP2018092858A - Bus bar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bus bar having a novel structure, which can advantageously suppress heat generated when soldering in one soldering part from diffusing to the other soldering part even when two soldering parts are located in the proximity.SOLUTION: In a bus bar 10 in which a plurality of soldering parts 12 and 14 are provided separated from each other in an extension direction, while a plurality of soldering parts 12 and 14 are separated from each other with a gap 16 in the extension direction, the plurality of the soldering parts 12 and 14 are electrically connected via an orthogonal connection part 24 that extends in a direction orthogonal to the extension direction from side edge parts of the respective soldering parts 12 and 14.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a bus bar having a plurality of soldering portions.

  Conventionally, a bus bar having a plurality of soldering portions has been used to connect various electrical components and the like. For example, one lead part of an element such as a resistor is inserted and soldered into the insertion hole of each soldering part, and the other lead part is used as an insertion hole of another bus bar or a through hole of a printed circuit board. An electrical circuit using such a bus bar is configured by being inserted and soldered.

  By the way, as such a bus bar having a plurality of soldering portions, for example, as shown in FIG. 1 of Japanese Patent Laid-Open No. 2005-166474 (Patent Document 1), a connecting portion that connects two soldering portions is used. On the other hand, it has been proposed to provide a notch portion on both sides in the width direction so that the connecting portion has a narrow crank shape. As a result, the heat generated during soldering in one soldering part is sufficiently suppressed from diffusing toward the other soldering part via the connecting part. It was possible to do.

  However, in the bus bar having the conventional structure as described above, two notches that open to the opposite sides in the width direction with respect to the connecting portion between the two soldering portions are provided apart from each other in the longitudinal direction of the connecting portion. There is a need. Therefore, if the two soldered parts are separated to some extent, it can be advantageously used, but if the two soldered parts are close due to the recent increase in the density and space saving of on-vehicle components. In the first place, it was difficult to provide the two notches spaced apart from each other, and some countermeasure was required.

JP 2005-166474 A

  The present invention has been made in the background of the above-mentioned circumstances, and the problem to be solved is the heat generated during soldering in one soldering portion even when the two soldering portions are close to each other. However, it is an object of the present invention to provide a bus bar having a novel structure that can advantageously suppress diffusion to the other soldering portion.

  A first aspect of the present invention is a bus bar in which a plurality of soldering portions are provided apart from each other in the extending direction, and the plurality of soldering portions are spaced from each other in the extending direction. While being separated from each other, the plurality of soldering portions are conductively connected through orthogonal connecting portions extending in a direction orthogonal to the extending direction from the side edge portions of the soldering portions. It is characterized by that.

  According to this aspect, since the plurality of soldering portions are separated from each other with a gap in the extending direction of the bus bar, the heat generated during soldering in one soldering portion is Diffusion to the soldering portion can be advantageously suppressed by the presence of such a gap. Further, the plurality of soldering portions are conductively connected via orthogonal connecting portions extending in a direction orthogonal to the extending direction from the side edge portion of each soldering portion. Therefore, even if two soldering parts are close to each other in the extending direction of the bus bar, an orthogonal connecting part is provided to electrically connect the two soldering parts using a space perpendicular to the extending direction. Thus, conduction between the soldered portions can be achieved while suppressing the diffusion of heat. As a result, it is possible to provide a bus bar including a plurality of soldering portions that can be advantageously applied to increase the density and space saving of in-vehicle components.

  Further, since the orthogonal connecting portion is provided orthogonal to the extending direction of the bus bar, for example, when the bus bar is disposed in the receiving groove provided in the case or the like, the orthogonal connecting portion is positioned with respect to the case. The bus bar positioning protrusions that have been separately required in the past can be omitted, and further space saving and simplification of parts can be advantageously achieved.

  According to a second aspect of the present invention, in the first aspect, the orthogonal connecting portion extends in the orthogonal direction from the side edge portion of one of the plurality of soldering portions. Each of a vertically extending portion, a second vertically extending portion extending in the orthogonal direction from the side edge portion in the other one of the plurality of soldering portions, and each of the first and second vertically extending portions It has a laterally extending portion that connects the extending end portions of the two, and has a U-shape as a whole.

  According to this aspect, since the two soldering portions are connected and connected by the orthogonal connecting portion having a U-shape as a whole, it is possible to more easily secure a large path length of the orthogonal connecting portion. . Further, by utilizing the U-shape, a large gap between the two soldering portions can be secured even in the orthogonal connection portion, and heat diffusion between the soldering portions can be suppressed to a higher degree.

  According to a third aspect of the present invention, in the one described in the second aspect, at both end portions of the lateral extension portion and a connecting corner portion of the extension end portion of the first and second vertical extension portions. Has a chamfered portion.

  According to this aspect, since the chamfered portion is formed at the connecting corner portion between the both end portions of the laterally extending portion and the extending end portions of the first and second vertically extending portions, The chamfered portion can be used as a guide in the case where the chamfered portion is disposed in a housing part provided in a case or the like. Therefore, it is possible to easily perform the operation of inserting the orthogonal connecting portion protruding in the orthogonal direction from the bus bar into the predetermined fitting hole provided in the case.

  According to the present invention, since the plurality of soldering portions are separated from each other with a gap in the extending direction of the bus bar, the heat generated during soldering in one soldering portion is Diffusion to the soldering portion can be advantageously suppressed by the presence of the gap. Further, since the plurality of soldering portions are conductively connected through the orthogonal connecting portions extending in the direction orthogonal to the extending direction from the side edge portions of the respective soldering portions, the bus bar extending direction is temporarily Even when the two soldering parts are close to each other, the soldering is performed while suppressing the diffusion of heat by providing an orthogonal coupling part that electrically connects both the soldering parts using the space in the direction orthogonal to the extending direction. Conduction can be conducted between attachment parts. Therefore, it is possible to provide a bus bar including a plurality of soldering portions that can be advantageously applied to high density and space saving of in-vehicle components. Further, since the orthogonal connecting portion is provided orthogonal to the extending direction of the bus bar, the orthogonal connecting portion is used as a positioning mechanism for the case when the bus bar is disposed in a receiving groove provided in the case, for example. It is also possible to eliminate the bus bar positioning protrusion, which was necessary in the past, and to cope with further space saving and simplification of parts.

The figure which shows the bus-bar as one Embodiment of this invention ((a) perspective view, (b) right side view, (c) top view). The disassembled perspective view showing the electrical junction box in which the bus bar shown in FIG. 1 was accommodated in the case. The right view showing the state which assembled | attached the electrical-connection box shown in FIG. The top view of the case main body shown in FIG. The top view showing the state by which the bus bar by which the electrical component was mounted | worn with the case main body shown in FIG. 4 was arrange | positioned. FIG. 6 is a perspective view of FIG. 5.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, FIG. 1 shows a bus bar 10 as an embodiment of the present invention. In the following description, “upper” means the upper side in FIG. 1 (b), “lower” means the lower side in FIG. 1 (b), and “front” means the left side in FIGS. 1 (b) and (c). The direction and the rear refer to the right side in FIGS.

  The bus bar 10 is formed, for example, by stamping and bending a metal plate such as a copper plate. A first soldering portion 12 having a substantially rectangular shape in plan view is formed on the front end side of the bus bar 10, while a second soldering portion having a substantially horizontally long rectangular shape in plan view is formed on the rear end side of the bus bar 10. 14 is formed, and the first soldering portion 12 and the second soldering portion 14 are provided so as to be separated from each other in the extending direction (the left-right direction in FIGS. 1B and 1C). It has been. That is, the first soldering portion 12 and the second soldering portion 14 are separated from each other with a gap 16 in the extending direction. Further, the central portion of the front end portion of the first soldering portion 12 and the central portion of the rear end portion of the second soldering portion 14 are substantially penetrated in the plate thickness direction (vertical direction in FIG. 1B). A through hole 18 having a circular cross-sectional shape is provided. Further, a positioning projection 20 is provided that protrudes in a substantially rectangular shape in plan view from the side edge portion of the rear end portion of the first soldering portion 12 toward the back (upward in FIG. 1C). Further, a gripping protrusion 22 is provided that protrudes in a substantially rectangular shape in a side view from the side edge on the back side of the front end portion of the second soldering portion 14 upward (in FIG. 1B, upward). .

  In addition, the first soldering portion 12 and the second soldering portion 14 are provided on the side edge portion on the near side (lower side in FIG. 1C) of the rear end portion of the first soldering portion 12 and A substantially U-shape as a whole in a side view extending in a direction orthogonal to the extending direction (downward in FIG. 1 (b)) from the side edge portion on the near side of the central portion of the second soldering portion 14. Conductive connection is established through an orthogonal connecting portion 24 having a shape. More specifically, the orthogonal connecting portion 24 includes a first vertically extending portion 26 having a substantially vertically long strip shape in a side view extending in the orthogonal direction from the side edge portion of the first soldering portion 12, and a second Each of the second longitudinally extending part 28, the first longitudinally extending part 26, and the second longitudinally extending part 28 having a substantially vertically long strip shape when viewed from the side extending from the side edge of the soldering part 14 in a side view. It has a substantially horizontally elongated strip-like laterally extending portion 30 in a side view connecting the extending end portions. Further, substantially tapered chamfered portions 32 are formed at the connecting corners of the both ends of the laterally extending portion 30 and the extending end portions of the first vertically extending portion 26 and the second vertically extending portion 28. Yes.

  As shown in FIGS. 2 to 3, for example, as shown in FIGS. 2 to 3, the bus bar 10 having such a structure is accommodated in the case 34 to form an internal circuit 36, thereby forming an electrical connection box 38. It has become. More specifically, the case 34 includes a substantially rectangular box-shaped upper case 34a that opens downward, a substantially rectangular box-shaped lower case 34b that opens upward, and a substantially block-shaped case body 34c. Both are integrally formed by injection molding or the like with an insulating synthetic resin such as polypropylene (PP) or polyamide (PA). After accommodating and arranging the internal circuit 36 including the bus bar 10 from above with respect to the case main body 34c, the case main body 34c is accommodated in the lower case 34b. Then, by assembling the upper case 34a to the lower case 34b, the locked portion 42 of the upper case 34a is locked to the lock portion 40 of the lower case 34b, and the electric junction box 38 in which the internal circuit 36 is accommodated in the case 34 is provided. It is configured.

  As shown in FIGS. 4 to 6, the case main body 34 c includes a substantially rectangular block-shaped bus bar accommodating portion 44 that accommodates the bus bar 10, and a substantially rectangular block-shaped portion provided adjacent to the bus bar accommodating portion 44. It has connection terminal accommodating parts 46a and 46b. More specifically, the bus bar housing portion 44 has a substantially rectangular shape in a plan view that opens upward and extends in the extending direction (the left-right direction in FIGS. 4 to 5) of the soldering portions 12 and 14 of the bus bar 10. A bus bar accommodating groove 48 is formed. Further, a positioning protrusion receiving groove 50 and a holding protrusion receiving groove 52 having a substantially rectangular shape in a plan view opening upward are formed on the side edge portion on the back side (the upper side in FIGS. 4 to 5) of the bus bar receiving groove 48. While being formed so as to be connected to the receiving groove 48, the side edge portion on the front side (the lower side in FIGS. 4 to 5) of the bus bar receiving groove 48 is a substantially oblong rectangle in a plan view opening in the vertical direction. An orthogonal connecting portion receiving hole 54 having a shape is formed so as to be connected to the bus bar receiving groove 48. In addition, the connection terminal accommodating portions 46a and 46b are connected in a substantially rectangular shape in a plan view that opens upward and extends in the extending direction of connection terminals 60a and 60b described later (left and right directions in FIGS. 4 to 5). Terminal receiving grooves 56a and 56b are formed. At the side edge on the back side (upper side in FIGS. 4 to 5) of the connection terminal accommodating grooves 56 a and 56 b, there is a substantially rectangular gripping protrusion accommodating groove 58 in a plan view that opens upward. 56b is connected to 56b. In addition, the connection terminals 60a and 60b accommodated in the connection terminal accommodating portions 46a and 46b have a substantially horizontally long rectangular shape in plan view as shown in FIGS. 5 to 6, a soldering portion 62 is formed at an end portion in the left-right direction), and a substantially circular cross-sectional through-hole penetrating in the thickness direction is formed at the center of the soldering portion 62. 64 is provided. Further, a gripping protrusion 66 that protrudes in a substantially rectangular shape in a side view from the side edge portion on the back side (upper side in FIGS. 5 to 6) of the soldering portion 62 is provided. The connection terminals 60a and 60b are formed, for example, by stamping and bending a metal plate such as a copper plate. In addition, as shown in FIGS. 5 to 6, between the bus bar housing portion 44 and the connection terminal housing portions 46 a and 46 b of the case main body 34 c, an electric component having a substantially rectangular shape in plan view that opens in the vertical direction. An electrical component accommodating portion 70 capable of accommodating 68 is provided.

  As shown in FIGS. 4 to 6, the bus bar 10 is compared with the bus bar housing portion 44, the electrical component housing portion 70, and the connection terminal housing portions 46 a and 46 b of the case body 34 c configured as described above. , The electrical component 68 and the connection terminals 60a and 60b are accommodated and arranged to constitute the internal circuit 36. More specifically, first, the lead part 72 of the electrical component 68 is soldered and fixed to the soldering parts 12 and 14 of the bus bar 10 in advance outside the case main body 34c. Specifically, for example, the grip protrusion 22 of the bus bar 10 is picked and the bus bar 10 is accommodated and arranged at a predetermined position in a jig (not shown) from above. Subsequently, for example, the holding projections 66 of the connection terminals 60a and 60b are picked and the connection terminals 60a and 60b are accommodated and arranged at predetermined positions in the jig from above. After the two lead portions 72 of the electrical component 68 such as a resistor and thermistor are inserted into the through holes 64 of the soldering portions 62 of the connection terminals 60a and 60b and the through holes 18 of the soldering portions 12 and 14 of the bus bar 10, respectively. By bending, the electrical component 68 is temporarily fixed to the connection terminals 60 a and 60 b and the bus bar 10. Finally, the electrical component 68 is connected and fixed to the connection terminals 60a and 60b and the bus bar 10 by soldering the temporarily fixed lead portion 72 and the soldering portions 12, 14, and 62. It is.

  And the connection body of the bus bar 10, the electrical component 68, and the connection terminals 60a, 60b constituting the internal circuit 36 thus configured is accommodated in the case body 34c. That is, for example, the grip protrusions 22 of the bus bar 10 and the grip protrusions 66 of the connection terminals 60a and 60b are picked, and the bus bar 10, the connection terminals 60a and 60b, and the electrical components 68 are connected from above to the bus bar housing portion 44 and the connection terminal housing portions 46a 46b and the electrical component accommodating part 70 are accommodated and arranged. More specifically, in the bus bar 10, the lowermost orthogonal connecting portion 24 is inserted into the orthogonal connecting portion receiving hole 54. Since a substantially tapered chamfered portion 32 is formed at the connecting corner portion of the extending end portion of the longitudinally extending portion 26 and the second vertically extending portion 28, the orthogonally connecting portion 24 accommodates the orthogonally connecting portion. Centered with respect to hole 54. This facilitates the work of inserting the orthogonal connecting portion 24 protruding in the orthogonal direction from the bus bar 10 into the orthogonal connecting portion receiving hole 54 provided in the case main body 34c, and the entire bus bar 10 to the case main body 34c. Positioned advantageously with respect to each other, the orthogonal connecting part 24, the positioning protrusion 20 and the gripping protrusion 22 of the bus bar 10 are respectively connected to the orthogonal connecting part receiving hole 54, the positioning protrusion receiving groove 50 and the gripping protrusion receiving groove 52 of the bus bar receiving part 44. It is accommodated and arranged smoothly. Thus, the bus bar 10 accommodated in the case main body 34c is positioned and accommodated and held at the above-described accommodation position by contact with the peripheral wall of the orthogonal coupling portion accommodation hole 54 of the orthogonal coupling portion 24. Further, positioning is also performed by the contact of the positioning protrusion 20 with the peripheral wall of the positioning protrusion receiving groove 50. Thereby, positioning of the bus bar 10 with respect to the case main body 34c is stably realized. Further, at the same time that the bus bar 10 is accommodated in the bus bar accommodating portion 44, the connection terminals 60a, 60b are accommodated in the connection terminal accommodating portions 46a, 46b. At this time, the gripping projections 66 of the connection terminals 60a and 60b are arranged in the gripping projection receiving grooves 58 of the connection terminal storage portions 46a and 46b. Further, the electrical component 68 is accommodated and disposed in the electrical component accommodating portion 70 in a state where the bus bar 10 and the connection terminals 60a and 60b are accommodated and disposed in the bus bar accommodating portion 44 and the connection terminal accommodating portions 46a and 46b, respectively. It has become. Finally, the case main body 34c in which the internal circuit 36 is accommodated in this way is accommodated in the lower case 34b, and the upper case 34a is assembled to the lower case 34b, whereby the internal circuit 36 is accommodated in the case 34. An electrical junction box 38 is configured.

  According to the bus bar 10 having such a configuration, the first soldering portion 12 and the second soldering portion 14 are separated from each other with a gap 16 in the extending direction. Therefore, for example, the presence of the gap 16 can advantageously suppress heat generated during soldering in the first soldering portion 12 from diffusing into the second soldering portion 14. In addition, the first soldering portion 12 and the second soldering portion 14 are provided on the side edge portion on the near side of the rear end portion of the first soldering portion 12 and in front of the center portion of the second soldering portion 14. Conductive connection is established through an orthogonal connecting portion 24 having a substantially U shape as a whole extending from the side edge portion on the side in the direction orthogonal to the extending direction. Therefore, even when the first soldering portion 12 and the second soldering portion 14 are close to each other in the extending direction, both spaces are used by utilizing the space in the direction orthogonal to the extending direction. Since it is possible to increase the length of the orthogonal connecting portion 24 that conductively connects the soldering portions 12 and 14, for example, heat generated in the first soldering portion 12 is diffused to the second soldering portion 14. This can be advantageously suppressed. From the above, it is possible to provide the bus bar 10 including the first soldering portion 12 and the second soldering portion 14 that can be advantageously applied to increase the density and space saving of in-vehicle components.

  The orthogonal connecting portion 24 includes a first longitudinally extending portion 26 extending in the orthogonal direction from the side edge portion of the first soldering portion 12 and an orthogonal direction from the side edge portion of the second soldering portion 14. The second longitudinally extending portion 28 that extends, and the laterally extending portion 30 that connects the respective extending end portions of the first longitudinally extending portion 26 and the second longitudinally extending portion 28 are configured. . Thereby, since the 1st soldering part 12 and the 2nd soldering part 14 are connected and connected by the orthogonal connection part 24 which has a U-shape as a whole, the path length of the orthogonal connection part 24 is reduced. It can be more easily secured. In addition, since the gap 16 between the first soldering part 12 and the second soldering part 14 can be ensured by using the U-shape, heat diffusion between the soldering parts 12 and 14 can be prevented. Further suppression is possible.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited by the specific description. For example, in the above embodiment, the bus bar 10 is provided with the positioning projection 20 for positioning with respect to the case main body 34c, but without the positioning projection 20, only the orthogonal connecting portion 24 and the orthogonal connecting portion receiving hole 54 are provided. The positioning mechanism may be configured as described above. Thereby, it becomes possible to cope with further space saving. Moreover, in the said embodiment, although the orthogonal connection part 24 had substantially U shape by the side view, it may be a substantially rectangular shape by the side view. Furthermore, in the said embodiment, although the orthogonal connection part 24 was extended and formed in the substantially same width dimension, for example, the width dimension of the 1st vertical extension part 26 and the 2nd vertical extension part 28, and a lateral extension part The 30 width dimensions may be different. In addition, in the above-described embodiment, the bus bar 10 is provided with only two soldering portions 12 and 14, but an arbitrary number of three or more soldering portions may be provided. In this case, if the gap 16 is formed between the adjacent soldering portions and the orthogonal connection portion 24 is conductively connected, the effect of the present invention can be obtained in the same manner.

10: bus bar, 12: first soldering part, 14: second soldering part, 16: gap, 24: orthogonal connecting part, 26: first longitudinally extending part, 28: second longitudinally extending part, 30: Lateral extension, 32: Chamfer

Claims (3)

A bus bar in which a plurality of soldering portions are provided apart from each other in the extending direction,
While the plurality of soldering portions are separated from each other with a gap in the extending direction,
The bus bar, wherein the plurality of soldering portions are conductively connected through orthogonal connecting portions extending in a direction orthogonal to the extending direction from a side edge portion of each soldering portion.   The orthogonal connecting portion includes a first longitudinally extending portion extending in the orthogonal direction from the side edge portion of one of the plurality of soldering portions, and the side of the other one of the plurality of soldering portions. A second longitudinally extending portion extending in the orthogonal direction from the edge, and a laterally extending portion connecting the respective extending end portions of the first and second longitudinally extending portions; The bus bar according to claim 1, which has a shape.   3. The bus bar according to claim 2, wherein chamfered portions are formed at connecting corners between the both ends of the laterally extending portion and the extending end portions of the first and second vertically extending portions.

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