JP2011181468A - Board terminal with bus bar - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a board terminal with bus bar of a novel structure which has a simple structure superior in yield and versatility and can be soldered without causing cracks and a fixing failure. <P>SOLUTION: The board terminal with a bus bar is composed of a board terminal 26 made of metal which connects an electric component and a printed wiring of a printed-circuit board 14 and a bus bar 30 made of a flat metal plate which is assembled in the board terminal 26 and forms a conductive path. The board terminal 26 is provided with a connection part 32 to be connected with the electric component, a conductive leg 52 which is inserted in a through hole 18 of the printed-circuit board 14 to be soldered, and a pinching part 34 which pinches the bus bar 30 from both sides in a thickness direction to make conduction. Furthermore, in the slit 72 formed in the bus bar 30, there is provided a locking structure to which a locking projection 50 formed in the board terminal 26 is inserted and which prevents pulling out of the bus bar 30 from the board terminal 26. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a board terminal for electrically connecting an electrical component such as a connector or a fuse provided on an external electric wire terminal and a printed wiring of a printed board, and more particularly, a bus bar having a bus bar constituting a conductive path. The present invention relates to a substrate terminal.

  2. Description of the Related Art Conventionally, board terminals are used as means for connecting electrical components such as connectors and fuses and printed wiring on a printed board provided in an electrical junction box in electrical junction boxes for automobiles. The board terminal is a member formed of a conductive metal material, and includes a connection part connected to an electrical component and a conductive leg part that is inserted into a through hole of a printed board and soldered. Yes.

  By the way, in an internal circuit of an electric junction box, it is generally performed by combining a printed circuit board and a bus bar made of a metal flat plate constituting a conductive path for large current. In particular, it is often the case where a large current is required to be connected to an external electrical component such as a connector or a fuse. Therefore, for example, as shown in Japanese Patent Application Laid-Open No. 2006-42586 (Patent Document 1) and Japanese Patent Application Laid-Open No. 2007-124862 (Patent Document 2), a plurality of connecting portions and conductive legs are integrally formed. The bus bar is configured, and the electrical components connected to the connection portion of the bus bar are connected to the printed wiring of the printed circuit board through the conductive legs of the bus bar.

  However, in the bus bar in which a plurality of connection portions and conductive leg portions are integrally formed, there is a problem that the shape is complicated and the yield of the material is deteriorated during manufacturing. In addition, since it is necessary to form the connection portion with a shape and arrangement suitable for the electrical component to be mounted, it is necessary to redesign the bus bar for each circuit configuration. For this reason, it is difficult to use the same bus bar in which connection portions and the like are integrally formed with respect to electrical connection boxes having different structures.

  In addition, the bus bar requires a certain amount of size to ensure current-carrying performance, so the heat dissipation is large, and if you try to attach the bus bar to the printed circuit board by soldering, good soldering will occur due to rapid cooling. It was difficult. In addition, bus bars that are large as a whole are often soldered in a state where they are held and positioned by an insulating plate, case, a specific synthetic resin holder, etc. Depending on the difference in thermal expansion coefficient of the plate, case, holder, etc., there is a possibility that an external force acts on the soldered portion to cause a crack.

JP 2006-42586 A JP 2007-124862 A

  The present invention has been made in the background of the above-mentioned circumstances, and its solution is a simple structure that can improve the yield and is excellent in versatility, and is also cracked and fixed to the printed circuit board. An object of the present invention is to provide a board terminal with a bus bar having a novel structure that can be attached by soldering without causing defects.

  In other words, according to the first aspect of the present invention, in the board terminal with a bus bar, the metal board terminal for connecting the electrical component and the printed wiring of the printed board, and the conductive path are assembled to the board terminal. A bus bar made of a metal flat plate, connected to the board terminal, connected to the electrical component, and conductive legs inserted into the through hole of the printed board and soldered And a sandwiching portion that sandwiches and connects the bus bar from both sides in the plate thickness direction, and a locking projection formed on the board terminal is inserted into a slit formed in the bus bar. A locking means for preventing the bus bar from being pulled out from the board terminal is provided.

  According to the board terminal with a bus bar having the structure according to the first aspect, the board terminal and the bus bar are formed independently of each other, so that the bus bar has a bus bar as compared with the conventional structure in which the board terminal and the bus bar are integrally formed. The structure can be simplified. Therefore, the manufacture of the bus bar is facilitated, the productivity is improved, and the yield of the material is improved, so that it can be provided at a low cost.

  Furthermore, the board terminals can be arranged in accordance with the number and position of through-holes in the printed board, and different terminal arrangements can be easily accommodated by bending or cutting of the long plate-shaped bus bar. As described above, even when the circuit design of the printed circuit board is different, the circuit board terminal and the bus bar can be flexibly dealt with without requiring a significant design change. In short, the board terminal with bus bar according to the present invention can be generally used for a plurality of types of printed boards having different circuit designs.

  Also, by soldering only the board terminal to the printed board before attaching the bus bar, it is possible to prevent soldering defects due to heat dissipation and to provide a high-quality electric circuit stably. Furthermore, when soldering, it is only necessary to position the terminal for the board with respect to the printed circuit board, and there is no need to use a separate member such as a synthetic resin holder that has been required to position and hold a large bus bar. . Therefore, a large external force does not act on the soldering portion due to a difference in thermal expansion due to heating during soldering, and cracks and the like are prevented.

  In addition, the connection between the bus bar and the board terminal is realized by a holding portion that sandwiches the bus bar in the thickness direction. As a result, a large contact area between the bus bar and the board terminal can be secured, and conduction stability can be secured.

  In addition, the locking means is configured by inserting the locking projection of the board terminal into the slit of the bus bar, and the board terminal and the bus bar are locked and positioned with each other without requiring welding or bonding, It is held in a predetermined assembled state. Thereby, problems such as poor conduction between the board terminal and the bus bar, and short circuit due to the board terminal or bus bar coming into contact with other terminals are avoided.

  According to a second aspect of the present invention, in the board terminal with a bus bar according to the first aspect, a step portion is formed in an intermediate portion of the conduction leg in the board terminal, while the conduction leg is provided. The front end side of the step portion is an insertion portion and is inserted into the through hole of the printed circuit board, and the bus bar is positioned closer to the connection portion than the step portion by the locking projection. It is.

  According to the second aspect, the bus bar is held by the board terminal so as to be spaced apart from the surface of the printed board. Therefore, a special insulating plate for insulating and holding the bus bar with respect to the printed circuit board is not necessary, and the number of parts can be reduced. In addition, a step portion is formed on the conductive leg protruding to the base end side of the board terminal, and the amount of insertion of the conductive leg into the through hole is regulated, so that the board terminal is in relation to the printed board. Soldering is performed uniformly, and the printed wiring and the board terminal are stably conducted.

  According to a third aspect of the present invention, in the board terminal with a bus bar according to the first or second aspect, the base plate part on which the bus bar is superimposed in the board terminal, and the base plate part A tongue piece for pressing the bus bar is integrally formed, and the clamping portion is constituted by the base plate portion and the tongue piece.

  According to this aspect, the bus bar can be reliably brought into contact with and held by the board terminal using the pressing force of the tongue piece against the base plate portion. Further, since the bus bar is inserted between the tongue piece having a predetermined width dimension and the base plate portion, the bus bar can be easily inserted into the holding portion, and reliable conduction can be ensured with a wide contact area. . In addition, you may form the tongue piece in this aspect, for example by cutting and raising the center part of a base board part.

  According to a fourth aspect of the present invention, in the board terminal with bus bar according to the third aspect, in the terminal for the board, the tongue piece is integrally formed by extending from one end edge of the base plate part. The tongue piece is folded back and disposed opposite to the base plate portion to form the holding portion for sandwiching the bus bar between the base plate portion and the tongue piece. The base plate portion that is located on the opening side of the tongue piece, with the extended end portion of the piece being opened toward the other end edge portion of the base plate portion to form an insertion port of the bus bar The connecting portion protrudes from the other edge of the tongue, while the conductive leg protrudes toward the side opposite to the opening direction of the tongue.

  According to the fourth aspect, the leaf spring is formed by folding the tongue piece from the base plate portion, and the holding portion can be formed with a simple configuration. And since the tongue piece is not formed by cutting and raising the central portion of the base plate portion, it is folded from the base plate portion and overlapped with the base plate portion, so that the base plate portion is moved forward in the pressing direction of the tongue piece. The base plate portion can effectively receive the pressing force from the tongue piece. Thereby, a bus bar can be hold | maintained more stably by pinching a bus bar between the overlapping surfaces of a tongue piece and a base board part. Further, since a larger contact area between the base plate portion and the bus bar can be secured, further conduction stability can be secured.

  In addition, since the insertion opening of the bus bar is opened toward the upper side of the printed board opposite to the conductive leg, the conductive bar of the board terminal is soldered and fixed to the printed board, and then the bus bar is It can be inserted into the insertion slot from above the printed board and connected to the board terminal. Thereby, the assembly | attachment of the bus bar on a printed circuit board can be performed easily.

  According to a fifth aspect of the present invention, in the one described in any one of the first to fourth aspects, the side edge of the board terminal is bent so as to rise to the overlapping surface side of the bus bar. Thus, the locking projection is formed.

  According to this aspect, the locking protrusion can be easily formed integrally with the board terminal. In addition, since the latching protrusion is formed by standing on the overlapping side of the bus bar, the bus bar is sandwiched in the plate thickness direction by simply inserting the latching protrusion into the slit of the bus bar, thereby forming a clamping part. In this case, it is possible to advantageously prevent the movement of the bus bar in the sliding direction, which causes a problem.

  According to a sixth aspect of the present invention, in the board terminal with a bus bar described in any one of the first to fifth aspects, the plurality of slits provided in the bus bar are repeated at a predetermined pitch in the longitudinal direction. Is formed.

  According to the sixth aspect, since the bus bar slits are formed at a predetermined pitch that is repeated, the versatility of the bus bar is further enhanced compared to the case where the slits are formed at irregular intervals, A bus bar can be shared for printed circuit boards with different circuit designs.

  According to the present invention, the board terminal and the bus bar are integrally formed by forming the board terminal and the bus bar separately and combining them to form a predetermined board terminal with the bus bar. Can be avoided. That is, improvement of yield by simplification of the shape of the bus bar, improvement of diversion of the board terminal and bus bar for printed circuit boards with different terminal arrangements, avoidance of poor soldering due to heat pulling, etc. are all realized. .

The perspective view which shows the mounting state to the printed circuit board of the terminal for board | substrates with a bus bar of the structure according to this invention. The top view in the mounting state to the printed circuit board of the terminal for board | substrates with a bus bar shown by FIG. The front view of the board | substrate structure in the mounting state to the printed circuit board of the terminal for board | substrates with a bus bar shown by FIG. The right view in the mounting state to the printed circuit board of the terminal for board | substrates with a bus bar shown by FIG. The perspective view of the terminal for 1st board | substrates which comprises the terminal for board | substrates with a bus bar shown by FIG. The front view of the terminal for 1st board | substrates shown by FIG. The left view of the terminal for 1st boards | substrates shown by FIG. The top view of the terminal for 1st board | substrates shown by FIG. The perspective view of the terminal for 2nd board | substrates which comprises the terminal for board | substrates with a bus bar shown by FIG. FIG. 10 is a rear view of the second substrate terminal shown in FIG. 9. FIG. 10 is a left side view of the second board terminal shown in FIG. 9. FIG. 10 is a plan view of the second substrate terminal shown in FIG. 9. The perspective view of the bus bar which comprises the terminal for board | substrates with a bus bar shown by FIG. The longitudinal cross-sectional view explaining the attachment of the bus bar with respect to the terminal for 1st board | substrates. The figure which expands and shows the principal part of the terminal for board | substrates with a bus bar. The perspective view which shows the printed circuit board with which the terminal for 1st, 2nd boards of FIG. 6, FIG. 10 was mounted. The perspective view of the fuse terminal shown by FIG.

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

  FIGS. 1 to 4 show a board terminal 10 with a bus bar having a structure according to the present invention mounted on a printed board 14. In the following description, the vertical direction means the vertical direction in FIG. 3 in principle.

  The board terminal 10 with bus bar is configured by combining a bus bar 30 with first board terminals 26, 26, 26... As board terminals and a second board terminal 28.

  The first substrate terminal 26 shown in FIGS. 5 to 8 is made of a conductive metal such as a copper alloy, and is formed by pressing a long metal plate punched into a predetermined shape. Is formed. The first substrate terminal 26 has an upper end portion as a connection portion 32 and a lower end portion as a clamping portion 34.

  The connection portion 32 has a substantially tuning fork shape bifurcated in the width direction upward, and each branch portion is gradually narrowed upward, and the upper end portion of each branch portion is in the width direction. Projects in an arc toward the inside.

  In addition, a clamping part 34 is integrally formed below the connection part 32. The clamping part 34 is comprised by the base board part 36 and the tongue piece 38, and can hold | grip the bus-bar 30 in a plate | board thickness direction. More specifically, the base plate portion 36 extends downward from the connection portion 32 and has a substantially flat plate shape with the vertical direction as the longitudinal direction. In other words, the connection portion 32 protrudes upward from the upper end of the base plate portion 36, and branches into two branches in the width direction of the base plate portion 36. On the other hand, the tongue piece 38 has a spring portion 40 and an abutting portion 42, and as a whole, has a tongue piece shape that extends downward and then is folded back to open upward. The spring portion 40 is formed with a width dimension smaller than that of the base plate portion 36, and a substantially semicircular folded portion 44 that extends downward from the center of the lower end of the base plate portion 36 and a folded portion 44. The flat plate portion 46 extends upward from the end opposite to the base plate portion 36 with an inclination gradually approaching the base plate portion 36. Further, a contact portion 42 extends upward from an end portion of the flat plate portion 46 opposite to the folded portion 44. The contact portion 42 has a substantially flat plate shape that extends substantially parallel to the base plate portion 36, and is spaced from the base plate portion 36 in the plate thickness direction by a predetermined gap smaller than the plate thickness dimension of the bus bar 30. Opposite. A guide portion 48 is integrally provided at the upper end of the abutting portion 42 so that the distance from the base plate portion 36 gradually increases as it goes upward.

  As described above, the base plate portion 36 and the abutting portion 42 of the tongue piece 38 are arranged to face each other in the thickness direction, so that the bus bar 30 is sandwiched between the base plate portion 36 and the abutting portion 42. The clamping part 34 made possible is constituted by a base plate part 36 and a tongue piece 38. Further, as is clear from the above description, the clamping portion 34 as a whole has a folded shape that opens upward, and is between the base plate portion 36 and the extended end portion (upper end portion) of the tongue piece 38. The bus bar 30 is formed with an insertion opening.

  In addition, a pair of locking projections 50 and 50 are integrally formed at the end in the width direction of the base plate portion 36. The locking projection 50 has a substantially flat plate shape and protrudes toward one side in the plate thickness direction of the base plate portion 36, and the pair of locking projections 50, 50 are opposed in the width direction with the tongue piece 38 interposed therebetween. Yes. The locking protrusion 50 is formed by, for example, forming a plate-like piece integrally formed at both ends (both side edge portions) of the base plate portion 36 and projecting outward in the width direction on one surface of the base plate portion 36 (described later). In the mounted state of the bus bar 30, the base plate portion 36 is integrally formed by bending at a substantially right angle toward the side where the bus bar 30 is superimposed.

  Further, a conductive leg 52 is integrally formed with the locking protrusion 50. The conduction leg 52 has a substantially flat plate shape and protrudes downward from the locking protrusion 50. Further, a stepped portion 54 is formed in the middle portion of the conduction leg 52 in the vertical direction, and the lower side is an insertion portion 56 having a smaller cross-sectional area than the upper side across the stepped portion 54 in the conduction leg 52. . Note that the lower end portion of the insertion portion 56 is gradually narrower and thinner toward the bottom.

  On the other hand, the second board terminal 28 shown in FIGS. 9 to 12 is formed of a conductive metal such as a copper alloy, like the first board terminal 26, and is a long plate-shaped metal plate. Is formed into a predetermined shape with a press or the like. More specifically, the second substrate terminal 28 has one end portion as a connection portion 58 and the other end portion as a sandwiching portion 60. In the description of the second board terminal 28, parts that are substantially the same as the first board terminal 26 are denoted by the same reference numerals in the drawing, and detailed description thereof is omitted.

  The connecting portion 58 has a flat plate shape having substantially constant thickness dimensions and width dimensions, and has a tapered shape whose upper end portion is thin and narrow toward the top.

  In addition, a clamping unit 60 is integrally formed below the connection unit 58. The sandwiching portion 60 includes a base plate portion 62 provided below the connection portion 58 and a pair of tongue pieces 38 and 38 extending from the base plate portion 62. The base plate portion 62 has a substantially flat plate shape wider than the connection portion 58 and protrudes on both sides of the connection portion 58 in the width direction with the same dimensions. Similarly to the first board terminal 26, the tongue piece 38 includes a spring portion 40 formed of a folded portion 44 and a flat plate portion 46, and a contact portion 42 that faces the base plate portion 62 with a predetermined gap therebetween. Integrated. The pair of tongue pieces 38, 38 extend from the lower end of the base plate portion 62 at a predetermined distance in the width direction.

  In addition, a pair of locking protrusions 50 are formed at the width direction end of the base plate portion 62. Further, the engaging protrusion 50 is integrally formed with a conductive leg 52 that protrudes downward.

  A central conduction leg 66 is integrally formed at the center in the width direction of the base plate portion 62. The center conduction leg 66 is a plate or bar extending linearly downward from the base plate 62 and is provided between the pair of tongue pieces 38, 38 in the width direction. Further, a stepped portion 68 is formed on both sides in the width direction in the middle portion of the central conduction leg 66 in the vertical direction, and the lower side is narrower than the upper side across the stepped portion 68 and the insertion is made with a small cross-sectional area. Part 70.

  A bus bar 30 is attached to the first board terminal 26 and the second board terminal 28. As shown in FIG. 13, the bus bar 30 includes a first board terminal 26, 26, 26... And a second board terminal 28 mounted on the printed board 14 with a conductive metal longitudinal plate material. It is formed by bending in the plate thickness direction according to the position.

  The bus bar 30 is formed with a plurality of slits 72, 72, 72. The slit 72 opens to the lower surface of the bus bar 30 and extends linearly upward, and has a length that does not reach the upper end of the bus bar 30. Further, a plurality of slits 72 are formed apart in the longitudinal direction, and the plurality of slits 72, 72, 72... Are provided at a predetermined pitch that is repeated in the longitudinal direction. That is, the slit 72 is formed over substantially the entire length of the bus bar 30 while alternately repeating a predetermined wide interval and a narrow interval, and a portion located between the slits 72 formed at a wide interval in the bus bar 30 is inserted. It is set as the piece 74, and the lower end part is becoming narrow and thin gradually toward the downward direction.

  The slit 72 has a wide interval corresponding to the distance between the pair of locking projections 50, 50 in one first substrate terminal 26, and a small interval between the slit 72 and the first substrate terminal 26. This corresponds to the distance from the first board terminal 26 adjacent thereto. Moreover, the part located between the slits 72 in the bus bar 30 is gradually narrowed as the lower end portion goes downward, so that the locking protrusions 50 are guided by the slits 72.

  The bus bar 30 is attached to the first and second board terminals 26 and 28. That is, as shown in FIG. 14, the bus bar 30 is inserted into the gap between the base plate portion 36 and the contact portion 42 in the first board terminal 26 from above and the base in the second board terminal 28. It is inserted from above into the gap between the plate part 62 and the contact part 42. The insertion piece 74 of the bus bar 30 is sandwiched in the thickness direction between the base plate portion 36 (62) and the contact portion 42 (42) using the elasticity of the spring portion 40, whereby the bus bar 30 is The first and second board terminals 26 and 28 are supported. In such a mounted state of the bus bar 30, the insertion piece 74 of the bus bar 30 is in contact with the base plate portions 36 and 62 and the contact portions 42 and 42 of the sandwiching portions 34 and 60. The second board terminals 26 and 28 are electrically connected. The insertion piece 74 of the bus bar 30 has a lower end that is narrower and thinner toward the lower side, and can be easily inserted between the base plate portions 36 and 62 and the contact portions 42 and 42.

  Further, as shown in FIG. 15, the locking protrusion 50 of the first board terminal 26 and the locking protrusion 50 of the second board terminal 28 are respectively inserted into the slits 72 of the bus bar 30. . The bus bar 30 is positioned in the vertical direction with respect to the first and second board terminals 26 and 28 by the upper bottom surface of the slit 72 coming into contact with the upper surface of the locking projection 50, and the side surface of the slit 72. The bus bar 30 is positioned in the length direction (left-right direction) with respect to the first and second board terminals 26 and 28 by abutting against the side surface of the locking projection 50. Thus, the locking means for positioning the bus bar 30 with respect to the first and second board terminals 26 and 28 is configured by the locking of the locking projection 50 and the slit 72.

  The slit 72 of the bus bar 30 is formed with a length in the vertical direction that is smaller than the distance in the vertical direction from the upper end surface of the locking projection 50 to the step portions 54 and 68. Accordingly, the bus bar 30 is held at a position spaced upward from the surface of the printed circuit board 14 in a state where the bus bar 30 described later is attached to the first and second board terminals 26 and 28.

  Then, the bus bar 30 is attached to the first and second board terminals 26 and 28, whereby a plurality of first board terminals 26, 26, 26... Are electrically connected to each other. Thereby, the board | substrate terminal 10 with a bus bar is comprised by the some board | substrate terminal 26,26,26 ..., the 2nd board | substrate terminal 28, and the bus bar 30 which were combined.

  The bus bar-equipped board terminal 10 having such a structure is mounted on the printed board 14. The printed circuit board 14 is a thin plate-shaped member having a printed wiring (not shown) on the surface, and has a plurality of through holes 18, 18, 18... Penetrating in the thickness direction. The opening peripheral edge and the inner peripheral surface of the through hole 18 are covered with a conductive material and are electrically connected to the printed wiring.

  .. And the insertion portions 56 and 70 of the second board terminal 28 are provided in the plurality of through holes 18 provided in the printed board 14. , 18, 18... And soldered to each other, as shown in FIG. 16, a plurality of first board terminals 26, 26, 26. 28 are mounted on the printed circuit board 14 separately. A plurality of first board terminals 26, 26, 26... Are arranged in two rows linearly extending in the left-right direction (left-right direction in FIG. 2) of the printed circuit board 14. A second board terminal 28 is arranged on the right side (right side in FIG. 2) of one row of the board terminals 26.

  Further, the stepped portion 54 of the first board terminal 26 and the stepped portions 54 and 68 of the second board terminal 28 are in contact with the opening peripheral edge of the through hole 18 in the printed board 14. Thus, the relative positions of the first and second board terminals 26 and 28 in the vertical direction with respect to the printed circuit board 14 are defined, and the protruding heights of the connection parts 32 and 58 and the through holes of the insertion parts 56 and 70 are defined. The amount of insertion into 18 is made substantially constant, and the holding portions 34 and 60 are positioned at positions spaced above the printed circuit board 14. The step portions 54 and 68 are brought into contact with the opening peripheral edge portion of the through hole 18 covered with the conductive material so that the first and second board terminals 26 and 28 are electrically connected to the printed wiring. ing.

  Next, the bus bar 30 is attached to the first and second board terminals 26 and 28 mounted on the printed board 14. Accordingly, as shown in FIGS. 1 to 4, a plurality of first board terminals 26, 26, 26..., A second board terminal 28, and a bus bar 30 are electrically connected. The board terminal 10 with bus bar is formed in a state of being mounted on the printed board 14.

  As shown in FIG. 16, a plurality of fuse terminals 76, 76, 76... Are mounted on the printed board 14, and the outside of the first board terminal 26 in the front-rear direction of the printed board 14. Arranged. As shown in FIG. 17, the fuse terminal 76 has an upper end portion which is a connection portion 78 having a tuning fork shape substantially the same as the connection portion 32 of the first board terminal 26, and a lower end portion which is a through hole. A pair of insertion portions 80 and 80 are inserted through 18 and soldered. A fuse as an electrical component is attached to the connection portion 32 of the first substrate terminal 26 and the connection portion 78 of the fuse terminal 76 that are adjacent to each other in the front-rear direction of the printed circuit board 14. And the fuse terminal 76 are electrically connected to each other. Further, a connector of an external energization path is connected to the connection portion 58 of the second board terminal 28, and electricity supplied to the second board terminal 28 through the external energization path passes through the bus bar 30 for each first board. Distributed to terminal 26. The electricity distributed to the first board terminal 26 is supplied to the printed wiring on the printed circuit board 14 and is transmitted from the first board terminal 26 to each fuse terminal 76 via a fuse. 14 is supplied to another circuit portion of the printed wiring on 14.

  In the bus bar-equipped board terminal 10 having the structure according to the present embodiment, the first and second board terminals 26 and 28 and the bus bar 30 are formed as separate members independent of each other. The structure of the bus bar 30 that is enlarged is simplified, and the yield of the material is improved.

  Further, the first and second board terminals 26 and 28 are independent from each other, and the degree of freedom of arrangement is increased, and the structure of the bus bar 30 is simplified. It is possible to cope with the printed board using the common first and second board terminals 26 and 28 and the bus bar 30. Specifically, the first and second board terminals 26 and 28 are freely arranged in accordance with the positions where the through holes 18 are formed on the printed board 14, and the first and second board terminals 26 and 28. By changing the bending position of the bus bar 30 according to the arrangement of the circuit board, the bus bar-equipped board terminal 10 according to the circuit design of the printed circuit board 14 can be obtained without requiring a significant design change. In short, the board terminal 10 with bus bar has a highly versatile structure because the first and second board terminals 26 and 28 and the bus bar 30 are formed independently of each other.

  Moreover, the bus bar 30 is formed with a plurality of slits 72, 72, 72... Repeating a wide interval and a narrow interval, and some of the insertion pieces 74 formed between the slits 72 are first. The first and second substrate terminals 26 and 28 are supported by the clamping portions 34 and 60. As described above, since the slits 72 are repeatedly formed at predetermined intervals in the length direction of the bus bar 30, the general-purpose bus bar 30 is realized more advantageously.

  Further, in the bus bar-equipped board terminal 10, the first and second board terminals 26, 28 are mounted on the printed circuit board 14 before the bus bar 30 is mounted, and are therefore soldered components. Is smaller than the conventional structure of the bus bar integrated type. As a result, heat radiation from the surface during the soldering operation is suppressed, and poor soldering due to rapid cooling is prevented.

  Further, the holding portions 34 and 60 provided in the first and second board terminals 26 and 28 are formed in a substantially tongue-like shape that is folded back at the lower end and opened upward, and the insertion piece 74 of the bus bar 30 is formed upward. The bus bar 30 can be clamped by being inserted from above. As described above, the mounting of the bus bar 30 to the first and second board terminals 26 and 28 is realized by insertion from above where contact with other terminals and the printed board 14 is unlikely to be a problem. 14 is easy to assemble the bus bar 30 to the first and second board terminals 26 and 28 mounted on the board 14.

  The second board terminal 28 which is wider than the first board terminal 26 is provided with a pair of tongue pieces 38, 38 spaced apart from each other by a predetermined distance in the width direction. As a result, the second board terminal 28 and the bus bar 30 are stably held in contact.

  Further, stepped portions 54 and 68 are formed in the conductive leg portions 52 and 66 of the first and second board terminals 26 and 28, and the first and second board terminals 26 and 28 are brought into contact with the upper surface of the printed board 14 by the first contact. The second board terminals 26 and 28 are positioned in the vertical direction with respect to the printed board 14. The distance in the horizontal projection between the upper surfaces of the locking projections 50 of the first and second board terminals 26 and 28 and the step portions 54 and 68 is made larger than the depth of the slit 72 of the bus bar 30. Thus, the bus bar 30 is held at a position spaced upward from the surface of the printed circuit board 14. Thereby, it is prevented that the bus bar 30 contacts the surface of the printed circuit board 14 and the printed wiring of the printed circuit board 14 is short-circuited.

  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 first and second substrate terminals 26 and 28, the shapes of the connection portions 32 and 58 are merely examples, and are not particularly limited. Further, the conduction leg 52 may be formed at a site different from the locking projection 50.

  Further, the arrangement and number of the first and second board terminals 26 and 28 and the shape of the bus bar 30 can be changed according to the circuit design, and are not particularly limited.

  The present invention can be advantageously applied to a terminal for a board other than the terminal for a printed board housed in the electric junction box for an automobile illustrated.

10: Terminal for board with bus bar, 14: Printed circuit board, 18: Through hole, 26: Terminal for first board, 28: Terminal for second board, 30: Bus bar, 32, 58: Connection part, 34, 60: Holding Part, 36, 62: base plate part, 38: tongue piece, 50: locking projection, 52: conduction leg part, 54: step part, 56: insertion part, 66: central conduction leg part, 68: step part, 70 : Insertion section, 72: Slit

Claims (6)

Metal board terminals for connecting electrical components and printed circuit board wiring, and
And a bus bar made of a metal flat plate that is assembled to the terminal for the substrate and constitutes a conductive path,
A connection portion connected to the electrical component, a conduction leg inserted through a through hole of the printed circuit board and soldered, and the bus bar are sandwiched from both sides in the plate thickness direction with respect to the board terminal. A clamping part is provided,
A latching projection formed on the board terminal is inserted into a slit formed on the bus bar, and latching means for preventing the bus bar from being pulled out from the board terminal is provided. Terminal for board with bus bar.   In the board terminal, a step portion is formed at an intermediate portion of the conduction leg portion, and a tip end side of the conduction leg portion with respect to the step portion is an insertion portion and is inserted into the through hole of the printed board. The bus bar-equipped terminal according to claim 1, wherein the bus bar is positioned closer to the connecting portion than the stepped portion by the locking protrusion.   In the substrate terminal, a base plate portion on which the bus bar is overlaid and a tongue piece for pressing the bus bar against the base plate portion are integrally formed, and the base plate portion and the tongue piece hold the pinch together. The board | substrate terminal with a bus bar of Claim 1 or 2 by which the part is comprised.   In the substrate terminal, the tongue piece extends from one end edge of the base plate portion and is integrally formed, and the tongue piece is folded back and disposed opposite the base plate portion, The holding portion for sandwiching the bus bar is formed between the base plate portion and the tongue piece, while the extending end portion of the tongue piece is opened toward the other edge portion of the base plate portion. Accordingly, an insertion port of the bus bar is formed, and the connecting portion protrudes from the other edge portion of the base plate portion located on the opening side of the tongue piece, while the opening direction of the tongue piece is The board terminal with a bus bar according to claim 3, wherein the conductive leg protrudes toward the opposite side of the board.   The board | substrate with a bus bar of any one of Claims 1-4 by which the side edge part of the said terminal for board | substrates is bent so that it may stand up on the overlapping surface side of the said bus bar, and the said latching protrusion is formed. Terminal.   The board terminal with a bus bar according to any one of claims 1 to 5, wherein the plurality of slits provided in the bus bar are repeatedly formed at a predetermined pitch in a longitudinal direction.

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