JP2012134087A - Electrical connection box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrical connection box having a new structure which prevents heat deformation of a resin base disposed on a printed substrate housed in a case and reduces the thickness by suppressing a projection dimension of the resin base from the printed substrate.SOLUTION: A Z shape part 36 having a first bending part 32 and a second bending part 34 is formed at a substrate terminal 20, and the substrate terminal 20 is inserted into a terminal insertion groove 46a of a resin base 26. This structure allows the first bending part 32 to contact with a printed substrate 18 and also allows the substrate terminal 20 to be gradually separated from the printed substrate 18 over an area from the first bending part 32 to the second bending part 34.

Description

  The present invention relates to an electrical connection box in which a printed circuit board on which board terminals are soldered is housed in a case, and in particular, an electrical connection box in which a base connector in which a plurality of board terminals are held by a resin base is provided on the printed circuit board. It is about.

  2. Description of the Related Art Conventionally, in an electrical connection box mounted on an automobile or the like, a case where a printed board is accommodated in a case and an internal circuit is configured by the printed board is known. For example, those described in Japanese Patent Application Laid-Open No. 2003-217437 (Patent Document 1). A plurality of circuit board terminals are soldered to the printed circuit board of such an electrical connection box, and these circuit board terminals protrude from the case so that they can be connected to external electrical components such as connectors and fuses. Yes.

  By the way, as described in Patent Document 1, a plurality of board terminals to be soldered to the printed circuit board are used for improving the efficiency of the soldering work and for supporting the board terminals when inserting / removing external electric components. May be provided on the printed circuit board as a pedestal connector collected by a resin pedestal made of synthetic resin.

  However, when the resin pedestal is provided on the printed circuit board, the printed circuit board must be accommodated in the case including the resin pedestal, which causes a problem of increasing the thickness of the electrical connection box. Therefore, it is preferable that the resin pedestal be as close to the printed circuit board as possible to reduce the amount of protrusion from the printed circuit board.

  However, when the resin pedestal is brought close to the printed board, the length dimension from the soldered portion to the resin pedestal at the board terminal is shortened. As a result, when soldering, the heat of the soldering portion is transmitted to the resin pedestal through the substrate terminals without being sufficiently dissipated, and there is a risk of causing thermal deformation of the resin pedestal. Thus, conventionally, as described in Patent Document 1, the resin pedestal is provided with legs so as to be separated from the printed circuit board, thereby increasing the distance from the soldered portion of the board terminal to the resin pedestal. However, in such a structure, the amount of protrusion of the resin pedestal from the printed board is further increased, leading to further thickening.

JP 2003-217437 A

  The present invention has been made in the background of the above-described circumstances, and the problem to be solved is that the resin pedestal is printed while preventing thermal deformation of the resin pedestal disposed on the printed circuit board accommodated in the case. An object of the present invention is to provide an electric junction box having a novel structure capable of reducing the thickness by suppressing the protruding dimension from the substrate.

  In the first aspect of the present invention, a pedestal connector in which a plurality of board terminals are held by a resin pedestal is mounted on a printed board housed in a case, and soldering provided on one end side of the board terminals In the electrical connection box in which the connection part provided on the other end side of the board terminal is projected out of the case and can be connected to an external electrical component while the part is soldered to the printed circuit board, Between the connection part of the board terminal and the soldering part, a first bent part located on the connection part side and a second bent part located on the soldering part side are formed, and these While the first bent portion and the second bent portion are bent at acute angles, respectively, the substrate terminal has a Z-shape, while the resin pedestal is provided with a terminal insertion groove opened on a side surface. And the board with respect to the terminal insertion groove While the first bent portion of the child is inserted and arranged, the first bent portion inserted and arranged in the terminal insertion groove is exposed on the surface of the resin pedestal facing the printed circuit board. The first bent portion of the board terminal is in contact with the printed board in a state where the resin pedestal is placed on the printed board, and the second bent portion from the first bent portion. It is characterized by being gradually separated from the printed circuit board toward the part.

  According to the present invention, the substrate terminal has a Z-shape. Then, by forming a terminal insertion groove that opens on the side surface in the resin pedestal, and inserting the substrate terminal into the terminal insertion groove, the substrate terminal extends from the first bent portion to the second bent portion, from the printed circuit board. Gradually separated. Accordingly, the second bent portion is positioned in a state of floating above the printed circuit board, and extends from the first bent section to the second bent section obliquely upward with respect to the printed circuit board. The distance extending from the soldering portion to the resin base in the board terminal can be ensured by the portion extending toward the printed board from the portion to the soldering portion. As a result, when the board terminal is soldered, the heat generated in the soldered portion is effectively dissipated before reaching the resin pedestal, and the thermal deformation of the resin pedestal can be reduced.

  And since the heat of the soldering part of a board | substrate terminal can be effectively dissipated until it reaches a resin base, the resin base can be arrange | positioned closer to a printed circuit board. Thereby, the protrusion dimension from the printed circuit board of a resin base can be suppressed, and thickness reduction of an electrical-connection box can be achieved.

  Further, when inserting / extracting the external electric component, the external force transmitted to the soldering portion can be reduced by bending and deforming the Z-shaped portion of the board terminal. Thereby, generation | occurrence | production of a solder crack can be suppressed. In particular, when an external electrical component is connected, the external force transmitted to the soldered portion can be more effectively prevented by the first bent portion being in contact with and supported by the printed circuit board.

  According to a second aspect of the present invention, in the device according to the first aspect, the terminal of the board terminal is engaged with a locking surface formed in the terminal insertion groove of the board terminal. A locking projection for defining the insertion end position is formed, and the locking projection is positioned on the same plane as the upper surface of the resin pedestal at the insertion end position. A pressing portion that is overlapped from the upper surface side of the resin pedestal is formed on the stop protrusion.

  According to this aspect, the position where the board terminal is inserted into the terminal insertion groove can be accurately defined by locking the locking projection of the board terminal to the locking surface of the terminal insertion groove. As a result, it is possible to easily and accurately align the protruding dimensions of the plurality of substrate terminals from the resin pedestal. Then, by holding the locking projection of the board terminal with the case, the board terminal can be supported by the case against the external force exerted on the board terminal when the external electrical component is removed. Thereby, the possibility of solder cracks can be further reduced.

  According to a third aspect of the present invention, in the one described in the first or second aspect, the case is opposed to the first bent portion with the printed board interposed therebetween. A support portion for supporting the bent portion from the printed circuit board side is formed.

  In this way, the first bent portion can be more firmly supported using the case against the external force in the pushing direction exerted on the board terminal when the external electric component is connected. As a result, the risk of solder cracks can be further reduced.

  According to a fourth aspect of the present invention, in the one described in any one of the first to third aspects, a positioning protrusion is formed on a surface of the resin pedestal facing the printed circuit board. The printed board is formed with a positioning hole into which the positioning protrusion is inserted.

  According to this aspect, the resin pedestal can be easily and accurately positioned on the printed board by inserting the positioning protrusions of the resin pedestal into the positioning holes of the printed board. In particular, after the resin pedestal is positioned and set in advance on the printed circuit board, the pedestal connector can be assembled to the printed circuit board by inserting the substrate terminal into each terminal insertion groove of the resin pedestal. In this way, the jig for supporting the substrate terminal can be made unnecessary or simplified.

  According to the present invention, the first bent portion is formed by forming the Z-shape having the first bent portion and the second bent portion on the substrate terminal, and inserting the substrate terminal into the terminal insertion groove of the resin base. Was brought into contact with the printed board and gradually separated from the printed board from the first bent portion to the second bent portion. Thereby, in a board | substrate terminal, the distance from a soldering part to a resin base can be ensured more, and the heat of a soldering part can be dissipated effectively by the time it reaches a resin base. As a result, the possibility of thermal deformation of the resin pedestal can be reduced, and the resin pedestal can be disposed closer to the printed circuit board, so that the thickness of the electrical connection box can be reduced.

Sectional drawing of the principal part of the electrical-connection box as 1st embodiment of this invention. The perspective view of the principal part of the printed circuit board which comprises the electrical-connection box shown in FIG. The perspective view of the board | substrate terminal which comprises the base connector shown in FIG. The side view of the board | substrate terminal shown in FIG. The perspective view of the board | substrate terminal different from FIG. 3 which comprises the base connector shown in FIG. The side view of the board | substrate terminal shown in FIG. The top view of the resin base which comprises the base connector shown in FIG. VIII-VIII top view in FIG. The perspective view of the principal part of the printed circuit board which comprises the electrical-connection box as 2nd embodiment of this invention. The perspective view of the board | substrate terminal which comprises the base connector shown in FIG. The side view of the board | substrate terminal shown in FIG. The perspective view of the board | substrate terminal different from FIG. 10 which comprises the base connector shown in FIG. The side view of the board | substrate terminal shown in FIG.

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

  First, the principal part of the electrical-connection box 10 as 1st embodiment of this invention is shown in FIG. The electrical junction box 10 accommodates a printed circuit board 18 in a case 16 constituted by an upper case 12 and a lower case 14, and wire terminals 20, 22 as board terminals protruding from the printed circuit board 18 (in FIG. 1). Only the wire terminal 20 is shown in the structure protruding from the case 16.

  In FIG. 2, the principal part of the printed circuit board 18 is shown. A pedestal connector 24 is mounted on the printed circuit board 18. The base connector 24 has a structure in which a plurality of wire rod terminals 20 and 22 are held by a resin base 26 made of synthetic resin.

  3 and 4 show the wire terminal 20. The wire terminal 20 is formed by cutting a metal wire having a square cross section into a predetermined length, one end being a connection portion 28 and the other end being a soldering portion 30. Yes. In the wire terminal 20, a first bent portion 32 located on the connection portion 28 side and a second bent portion 34 located on the soldering portion 30 side are formed between the connection portion 28 and the soldering portion 30. ing. As shown in FIG. 4, the wire terminal 20 is bent so as to form an angle: α1 at the first bent portion 32, and is bent so as to form an angle: α2 at the second bent portion. ing. The angle at the first bent portion 32: α1 and the angle at the second bent portion 34: α2 are both set to acute angles and are equal to each other. Thereby, the wire terminal 20 has the Z-shaped part 36 bent in Z shape in the intermediate part of the length direction, and it is a connection part from the 1st bent part 32 to the 2nd bent part 34. 28 and a slanting portion 38 extending obliquely with respect to the extending direction of the soldering portion 30, and a direct lower portion 40 extending linearly from the second bent portion 34 toward the soldering portion 30. In addition, the magnitude | size of the acute angle in the 1st bending part 32 and the 2nd bending part 34, and the length dimension of the skew part 38 consider the intensity | strength requested | required of the wire terminal 20, the thermal influence on the resin base 26, etc. It can be set as appropriate in consideration. For example, the soldering portion 30 can be further separated from the resin pedestal 26 by increasing the angles α1, α2 at both the bent portions 32, 34, or by increasing the length of the skew portion 38. The angle at the bent portions 32 and 34: α1 and α2 are reduced, or the length of the skewed portion 38 is shortened to bring the soldering portion 30 closer to the resin pedestal 26, thereby making the pedestal connector 24 more compact. I can do it.

  In addition, the wire terminal 20 is formed with a pair of locking protrusions 42, 42 located slightly on the connection portion 28 side from the first bent portion 32. The locking protrusions 42 and 42 are formed in a protruding shape that protrudes on both sides in the width direction of the wire terminal 20 and are integrally formed with the wire terminal 20 by partially crushing the wire terminal 20. On the other hand, between the second bent portion 34 and the soldering portion 30, contact stopper portions 44, 44 having the same shape as the locking protrusions 42, 42 are formed.

  5 and 6 show the wire terminal 22. In the wire terminal 22, portions having the same structure as the wire rod terminal 20 are denoted by the same reference numerals as those of the wire rod terminal 20 in the drawing, and the description thereof is omitted as appropriate.

  The wire terminal 22 is formed by cutting a metal wire having a longitudinal rectangular cross section at a predetermined length. Thereby, the connection part 28 of the wire terminal 22 is made into the flat tab shape which has a rectangular cross section. On the other hand, the soldering part 30 is extended with a square cross section having a size substantially equal to the soldering part 30 of the wire terminal 20 by cutting off both sides in the width direction by press punching or the like. Then, as the width dimension is reduced in the soldering portion 30, the stopper portions 44, 44 projecting on both sides in the width direction of the soldering portion 30 are formed at the extended base end portion of the soldering portion 30. Yes.

  A Z-shaped portion 36 similar to that of the wire terminal 20, a first bent portion 32, and a second bent portion 34 are formed at an intermediate portion in the longitudinal direction of the wire terminal 22. The size of the Z-shaped portion 36 in the wire terminal 22 is equal to the size of the Z-shaped portion 36 in the wire terminal 20, and the angle of the first bent portion 32 in the wire terminal 22: β1 and the second bent. The angle 34 of the portion 34 is equal to the angle α1 of the first bent portion 32 and the angle α2 of the second bent portion 34 of the wire terminal 20.

  The wire rod terminal 20 and the wire rod terminal 22 are held by a resin base 26. The resin pedestal 26 is shown in FIGS. The resin pedestal 26 has a rectangular block shape formed of non-conductive synthetic resin. A plurality of terminal insertion grooves 46 a and 46 b are formed in the resin base 26. The terminal insertion grooves 46a and 46b penetrate in the thickness direction (vertical direction in FIG. 8) of the resin pedestal 26, and are opposed to the upper surface 48 and the printed circuit board 18 that are opposed to the upper case 12 in the resin pedestal 26. It is open on both surfaces of the lower surface 50 to be a surface, and has a groove shape that opens on both side surfaces 52a and 52b orthogonal to the longitudinal direction (left and right direction in FIG. 7) of the resin pedestal 26. The width dimensions of the terminal insertion grooves 46a and 46b (the horizontal dimension in FIG. 7) are substantially equal to the width dimensions of the wire material terminal 20 and the wire material terminal 22 corresponding to the wire material terminal 20 and the wire material terminal 22, respectively. In the present embodiment, the width dimension of the terminal insertion grooves 46a and 46b is slightly larger than the width dimension of the wire rod terminals 20 and 22 so that the wire rod terminals 20 and 22 can be inserted without being press-fitted. Further, the terminal insertion grooves 46a and 46b are formed with a pair of positioning recesses 53 and 53 that protrude outward in the width direction at the opening to the upper surface 48, and the bottom surfaces of these positioning recesses 53 and 53 Locking surfaces 54, 54 that are orthogonal to the extending direction of the terminal insertion grooves 46a, 46b (vertical direction in FIG. 8) are formed. A plurality of such terminal insertion grooves 46 a and 46 b are formed at appropriate intervals in the longitudinal direction of the resin base 26. Further, positioning protrusions 56, 56 are formed to protrude at both ends in the longitudinal direction of the lower surface 50 in the resin pedestal 26.

  As shown in FIG. 2, the pedestal connector 24 is configured by inserting the wire material terminal 20 into the terminal insertion groove 46a of the resin pedestal 26 and inserting the wire material terminal 22 into the terminal insertion groove 46b. ing. The resin pedestal 26 is placed on the printed circuit board 18, and the soldering portions 30 of the wire terminals 20 and 22 are inserted into the through holes 58 of the printed circuit board 18 and soldered, whereby the pedestal connector 24 is mounted. Mounted on the printed circuit board 18.

  The pedestal connector 24 is preferably assembled to the printed circuit board 18 as follows, for example. First, a single resin pedestal 26 through which the wire terminals 20 and 22 are not inserted is placed on the printed circuit board 18. As shown in FIG. 1, positioning holes 60, 60 (only one is shown in FIG. 1) having a size corresponding to the positioning protrusions 56, 56 of the resin pedestal 26 are provided through the printed circuit board 18. By inserting the positioning projections 56, 56 of the resin pedestal 26 into the positioning holes 60, 60, the resin pedestal 26 can be fixed on the printed circuit board 18 without using an adhesive or a special fixing member. It is possible to position with high accuracy.

  The first bent portion 32 of the wire rod terminal 20 is inserted into the terminal insertion groove 46a of the resin base 26 fixed on the printed circuit board 18, and the first bent portion 32 of the wire rod terminal 22 is inserted into the terminal insertion groove 46b. Insert. In the present embodiment, since the width dimensions of the terminal insertion grooves 46a and 46b are slightly larger than the width dimensions of the wire terminals 20 and 22, the wire terminals 20 and 22 require a special pushing force. It can be inserted in a non-press-fit state. 2, the locking protrusions 42, 42 of the wire terminals 20, 22 are accommodated in the positioning recesses 53, 53 of the terminal insertion grooves 46a, 46b, and the locking surfaces 54, 54 (FIG. 7). 8), the insertion end positions of the wire rod terminals 20 and 22 into the resin base 26 are defined. Note that the locking projections 42 and 42 of the wire terminals 20 and 22 are positioned in the same plane as the upper surface 48 of the resin base 26 at the insertion end position. Further, simultaneously with the insertion of the wire rod terminals 20 and 22 into the terminal insertion grooves 46a and 46b, the soldering portions 30 of both terminals 20 and 22 are inserted into the through holes 58, respectively, and the stoppers 44 and 44 are through holes. By contacting the outer peripheral edge of 58, the amount of insertion of the soldering portion 30 into the through hole 58 is defined. Then, by soldering each soldering portion 30 inserted through the through hole 58, the wire terminals 20 and 22 project on the printed board 18, and the printed wiring and electrical wiring (not shown) of the printed board 18 are electrically connected. Connected. In this way, the base connector 24 is mounted on the printed circuit board 18.

  As is apparent from FIG. 1, the first bent portions 32 of the wire terminals 20 and 22 are arranged in the terminal insertion grooves 46a and 46b in the assembled state of the base connector 24 to the printed circuit board 18, and the resin base 26 is exposed on the lower surface 50 of the 26, and is in contact with the printed circuit board 18. As a result, the wire terminals 20, 22 protrude from the side surfaces 52 a, 52 b of the resin pedestal 26 outward in the width direction of the resin pedestal 26 from the first bent portion 32 toward the second bent portion 34. The first bent portion 32 is gradually separated from the printed circuit board 18 as it goes from the first bent portion 32 to the second bent portion 34.

  The printed circuit board 18 on which the pedestal connector 24 is mounted is accommodated in a case 16 constituted by the upper case 12 and the lower case 14. The upper case 12 and the lower case 14 are made of non-conductive synthetic resin. The upper case 12 is formed with a connector mounting portion 62 as a component mounting portion. The connector mounting portion 62 has a substantially rectangular peripheral wall shape that opens on the surface 64 of the upper case 12. Terminal insertion holes 68a and 68b (only the terminal insertion hole 68a is shown in FIG. 1) are provided through the bottom 66 of the connector mounting portion 62. Although detailed illustration is omitted, the terminal insertion holes 68a and 68b have a cross-sectional shape corresponding to the cross-sectional shape of the wire terminals 20 and 22, respectively, and are formed through the upper case 12. The bottom portion 66 of the connector mounting portion 62 is formed so as to protrude inward (downward in FIG. 1) of the upper case 12, and the protruding end surface 70 is a flat surface.

  On the other hand, the lower case 14 is integrally formed with a pair of support portions 72, 72. Although not shown in detail, the support portions 72 and 72 extend in parallel with each other at a predetermined distance, and project inward (upward in FIG. 1) of the lower case 14 to extend the length of the resin base 26. It is made into the protruding wall shape extended with the length dimension substantially equal to a direction dimension (FIG. 7 left-right direction dimension). The support surface 74 that is the protruding end surface of the support portion 72 is a flat surface.

  The upper case 12 and the lower case 14 are fixed to each other by a conventionally known lock mechanism (not shown) or the like while the printed circuit board 18 is accommodated. Thereby, the upper case 12 and the lower case 14 form a case 16, and the printed circuit board 18 is accommodated in the case 16.

  In a state of being accommodated in the case 16, the connection portions 28 of the wire terminals 20 and 22 protruding from the printed circuit board 18 are inserted into the terminal insertion holes 68 a and 68 b of the connector mounting portion 62, respectively. It protrudes outward of the upper case 12. As a result, a connector as an external electric component (not shown) housed in the connector mounting portion 62 is connected to the connection portion 28 of the wire terminal 20 and the connection portion 28 of the wire terminal 22 and is mounted on the connector mounting portion 62. It has become. Further, the bottom portion 66 of the connector mounting portion 62 is overlaid on the upper surface 48 of the resin pedestal 26.

  On the other hand, the support portions 72, 72 of the lower case 14 are positioned below the both ends in the width direction where the terminal insertion grooves 46a, 46b are formed in the resin base 26 with the printed circuit board 18 in between (downward in FIG. 1). The support surface 74 is superimposed on the printed circuit board 18. As a result, the first bent portion 32 of the wire terminals 20 and 22 and the support portion 72 are opposed to each other with the printed circuit board 18 interposed therebetween. Although not shown in the drawings, clearance holes having substantially the same size as the positioning holes 60 and 60 are formed at positions overlapping the positioning holes 60 and 60 of the printed circuit board 18 between the opposing surfaces of the support portions 72 and 72. The positioning projections 56, 56 of the resin base 26 and the support portions 72, 72 are prevented from interfering with each other.

  According to the electrical connection box 10 having the structure according to the present embodiment, the Z-shaped portion 36 is formed on the wire terminals 20 and 22, and the soldered portion 30 is formed from the first bent portion 32 positioned on the connection portion 28 side. The second bent portion 34 located on the side is gradually separated from the printed circuit board 18. As a result, the first bent portion 32 and the second bent portion 34 are each formed as a crank-shaped portion bent at a right angle, and the first bent portion 32 and the second bent portion 34 are compared with the case where the crank-shaped portion is placed on the printed circuit board 18. The distance from the soldering portion 30 to the resin pedestal 26 is further increased by the skewed portion 38 from the bent portion 32 to the second bent portion 34 and the direct lower portion 40 from the second bent portion 34 to the soldered portion 30. Largely secured. As a result, when the wire terminals 20 and 22 are soldered, the heat transmitted from the soldering portion 30 to the resin pedestal 26 through the terminals 20 and 22 is sufficient in the lower portion 40 and the skew portion 38 before reaching the resin pedestal 26. The possibility of thermal deformation of the resin pedestal 26 can be reduced. In particular, since the air flow around the Z-shaped portion 36 is improved by arranging the direct lower portion 40 and the oblique portion 38 so as to float from the printed circuit board 18, a more excellent heat dissipation effect can be exhibited. .

  Since the heat transmitted to the resin pedestal 26 through the wire terminals 20 and 22 can be reduced, the resin pedestal 26 can be disposed closer to the printed circuit board 18 and has a block shape without having leg portions or the like. The lower surface 50 can be disposed so as to overlap the printed circuit board 18. Thereby, the protrusion dimension from the printed circuit board 18 of the resin base 26 can be suppressed, and thickness reduction of the electrical junction box 10 can be achieved.

  Furthermore, when the connector is inserted into or removed from the wire terminals 20 and 22, the deformation of the Z-shaped portion 36 can reduce the transmission of external force to the soldering portion 30 and suppress the occurrence of solder cracks. . In particular, since the first bent portion 32 is located on the extension line of the connecting portion 28, when the connector is connected, the first bent portion 32 is brought into contact with the printed circuit board 18 to thereby connect the connecting portion. 28 can be firmly supported. In addition, the connection portion 28 can be supported more firmly by supporting the first bent portion 32 from the printed board 18 side by the support portion 72 protruding from the lower case 14. On the other hand, when the connector is pulled out, the locking protrusions 42 of the wire rod terminals 20 and 22 are pressed from above (upward in FIG. 1) at the bottom 66 of the connector mounting portion 62 protruding from the upper case 12. Thus, the wire terminals 20 and 22 can be supported against an external force in the drawing direction (from the bottom to the top in FIG. 1). Thus, in the present embodiment, the pressing portion is configured by the bottom portion 66 of the connector mounting portion 62.

  In the present embodiment, the resin pedestal 26 can be positioned and fixed on the printed circuit board 18 by inserting the positioning protrusions 56, 56 of the resin pedestal 26 into the positioning holes 60, 60 of the printed circuit board 18. The wire terminals 20 and 22 can be inserted into the terminal insertion grooves 46a and 46b in a non-press-fit state without requiring a special pushing force. Thus, after only the resin pedestal 26 is set on the printed circuit board 18 in advance, the wire terminals 20 and 22 can be inserted into the terminal insertion grooves 46a and 46b and soldered. Accordingly, it is possible to assemble the base connector 24 on the same line as the soldering process, thereby improving the manufacturing efficiency and eliminating the need for a jig for holding the wire terminals 20 and 22 before soldering. Simplification can be achieved. Further, when the soldering portion 30 is inserted into the through hole 58, the printed board 18 is contacted at two locations, that is, the first bent portion 32 and the stopper portion 44. It can be well defined, and the inclination of the wire terminals 20 and 22 can be suppressed.

  Next, FIG. 9 shows a pedestal connector 80 used in an electrical junction box as a second embodiment of the present invention. In the following description, members and parts having the same structure as in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and the description thereof is omitted as appropriate. .

  A plurality of strip material terminals 82 and 84 as substrate terminals are assembled to the resin pedestal 26 of the pedestal connector 80 in this embodiment. As shown in FIGS. 10 and 11, the strip material terminal 82 is formed by press punching a metal plate, and has a connection portion 28 having a square cross section and a square cross section having the same size as the connection portion 28. A soldering portion 30 is provided. A Z-shaped portion 36 is formed between the connecting portion 28 and the soldering portion 30 by being bent at an acute angle in each of the first bent portion 32 and the second bent portion 34.

  In addition, a pair of locking projections 42 and 42 are formed on the connection portion 28 side from the first bent portion 32. The locking protrusions 42 and 42 are formed by pressing the strip material terminal 82 by press punching of a metal plate, so that the thickness dimension of the other portions of the strip material terminal 82 (the horizontal dimension in FIG. 11) They are formed with equal thickness dimensions. Further, the end surfaces of the first bent portions 32 of the locking protrusions 42 and 42 are locked toward the first bent portion 32 in order to facilitate press-fitting into a positioning recess 53 described later. The projecting portions 42 and 42 are formed in a tapered shape with a tapered portion.

  On the other hand, as shown in FIGS. 12 and 13, the strip material terminal 84 is formed by press punching a metal plate in the same manner as the strip material terminal 82, and has a flat tab shape having a rectangular cross section. And a soldering portion 30 having a width smaller than that of the connection portion 28 and having the same square section as the soldering portion 30 of the strip material terminal 82. In addition, the width dimension of the soldering part 30 is made smaller than the width dimension of the connection part 28, and the 1st bending part 32 which contacts the printed circuit board 18 is formed with the same width dimension as the connection part 28. The second bent portion 34 is formed with the same width dimension as the soldering portion 30. Similarly to the strip material terminal 82, the locking projections 42, 42 of the strip material terminal 84 are also formed with the same width dimension (left-right dimension in FIG. 13) as other portions of the strip material terminal 84.

  The resin pedestal 26 has substantially the same structure as that of the first embodiment, and the positioning recesses 53 and 53 press-fit the locking projections 42 and 42 of the strip material terminal 82 and the strip material terminal 84. In order to do so, it is formed slightly smaller than the locking projections 42, 42.

  The strip material terminal 82 and the strip material terminal 84 are inserted into the terminal insertion grooves 46a and 46b of the resin base 26, respectively. In the present embodiment, the locking projections 42 and 42 of the strip material terminals 82 and 84 are press-fitted into the positioning recesses 53 and 53, so that the strip material terminals 82 and 84 are fixed to the resin base 26. It is supposed to be retained. Similarly to the first embodiment, the locking projections 42 and 42 of the strip material terminals 82 and 84 are positioned on the same plane as the upper surface 48 of the resin base 26.

  According to the present embodiment, the locking projections 42 and 42 of the strip material terminals 82 and 84 are press-fitted into the positioning recesses 53 and 53 of the terminal insertion grooves 46a and 46b, whereby the strip material terminal 82 and the strip material terminal 84 are pressed. Can be fixed to the resin base 26. Thus, as in the prior art, the strip terminals 82 and 84 are fixed to the resin pedestal 26 in advance to form the pedestal connector 80, and the soldered portions 30 of the strip material terminals 82 and 84 fixed to the resin pedestal 26 are removed. The printed circuit board 18 can be inserted into the through holes 58 and soldered together. Since the strip material terminals 82 and 84 are formed by press punching of a metal plate, the thickness dimension of the locking projections 42 and 42 can be ensured uniformly throughout the positioning recesses. It is possible to stably secure the press-fit holding force with respect to the locations 53 and 53. Further, since the locking projections 42 and 42 are formed by press punching, the entire opening to the upper surface 48 of the positioning recesses 53 and 53 is blocked while being inserted into the positioning recesses 53 and 53. It can be located on the same plane as the upper surface 48, and the pressing by the bottom 66 (see FIG. 1) of the upper case 12 can be performed more stably.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited by the specific description. For example, the resin pedestal in the above embodiment has a rectangular block shape that does not have legs, and the protruding dimension from the printed circuit board has been made as small as possible, but in order to further reduce the thermal effect, Legs may be formed as in the conventional case.

  Further, the substrate terminal in the embodiment is merely an example. For example, the locking protrusion formed on the substrate terminal is not always necessary. Further, the board terminal is not limited to the one to which the connector is connected, but may be one to which a fuse or a relay is connected. Therefore, as the shape of the connection portion of the board terminal, a so-called tuning fork shape including a pair of press contact blades that sandwich a tab-shaped terminal of a fuse or a relay can be employed. Further, as conventionally known, two soldering portions may be formed on one substrate terminal.

10: electrical connection box, 16: case, 18: printed circuit board, 20, 22: wire terminal (board terminal), 24, 80: base connector, 26: resin base, 28: connection part, 30: soldering part, 32 : First bent portion, 34: second bent portion, 36: Z-shaped portion, 42: locking projection, 46a, b: terminal insertion groove, 48: upper surface, 50: lower surface (opposite to printed circuit board) Surface), 52a, b: side surface, 54: locking surface, 56: positioning protrusion, 60: positioning hole, 66: bottom portion (pressing portion), 72: support portion, 80: base connector, 82, 84: strip material terminal (Board terminal)

Claims (4)

A pedestal connector in which a plurality of board terminals are held by a resin pedestal is mounted on a printed board housed in a case, and a soldering portion provided on one end side of the board terminals is soldered to the printed board. On the other hand, in the electrical connection box in which the connection portion provided on the other end side of the substrate terminal protrudes out of the case and can be connected to an external electrical component,
Between the connection part of the substrate terminal and the soldering part, a first bending part located on the connection part side and a second bending part located on the soldering part side are formed, While the first bent portion and the second bent portion are each bent at an acute angle, the substrate terminal has a Z-shape,
The resin pedestal is provided with a terminal insertion groove that opens in a side surface, and the first bent portion of the substrate terminal is inserted into the terminal insertion groove.
On the surface of the resin pedestal facing the printed board, the first bent portion inserted through the terminal insertion groove is exposed, and the resin pedestal is placed on the printed board. The first bent portion of the board terminal is in contact with the printed board, and is gradually separated from the printed board from the first bent portion toward the second bent portion. And electrical junction box. The board terminal is formed with a locking projection that is locked to a locking surface formed in the terminal insertion groove to define an insertion end position of the board terminal into the terminal insertion groove. The stop protrusion is positioned in the same plane as the upper surface of the resin pedestal at the insertion end position, and the case has a pressing portion that is overlapped with the locking protrusion from the upper surface side of the resin pedestal. The electrical junction box according to claim 1. 3. The support according to claim 1, wherein the case is formed with a support portion that is opposed to the first bent portion with the printed board interposed therebetween and supports the first bent portion from the printed board side. The electrical junction box described. The positioning protrusion is formed in the surface facing the said printed circuit board of the said resin base, On the other hand, the positioning hole in which the said positioning protrusion is inserted is formed in the said printed circuit board. The electrical junction box described in the section.

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