JP2012005280A - Pedestal with terminal and electric connection box equipped with printed board mounting the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pedestal with terminal with a new structure, which can efficiently fix a plurality of substrate terminals to the pedestal without press fitting.SOLUTION: A substrate terminal 20 is made in a crank shape having a bent portion 34 in an intermediate part in a length direction. A pedestal 24 is made into an insertion molding including the substrate terminal 20. The bent portion 34 of the substrate terminal 20 is exposed to a lower face 40 of the pedestal 24 overlapped with a printed board 14. A part of the substrate terminal 20 on a connection portion 32 side of the bent portion 34 is made to penetrate the pedestal 24 and project to an upper face of the pedestal 24.

Description

  The present invention relates to a pedestal with a terminal in which a plurality of board terminals connected to a conductive path of a printed board are fixed to a pedestal made of synthetic resin, and an electric junction box including a printed board on which the pedestal with terminals is mounted. .

  2. Description of the Related Art Conventionally, a printed circuit board housed in a case of an electric junction box of an automobile and constituting an internal circuit is provided with a plurality of board terminals that are soldered to a conductive path of the printed circuit board at one end side. By connecting an external electrical component such as a connector to the other end of the terminal, an external electrical circuit is connected to the electrical circuit of the printed circuit board.

  By the way, a plurality of board terminals protruding from the printed board are often provided as a pedestal with a terminal that is previously penetrated and fixed to a pedestal made of synthetic resin, and are often positioned and soldered to the printed board. As such a pedestal with a terminal, conventionally, as shown in FIG. 3 of Japanese Patent Laid-Open No. 2008-35669 (Patent Document 1), a substrate terminal is press-fitted and fixed in a press-fitting hole penetrating the pedestal. Things were widely adopted.

  However, since the cross-sectional area of the board terminal is small, there is a possibility that buckling deformation occurs when the board terminal is press-fitted into the pedestal. In particular, in recent years, with further miniaturization and higher density of electrical components and electrical circuits, board terminals having an extremely small cross-sectional area are required. It was extremely difficult to press fit on the pedestal. In addition, since the board terminals are individually press-fitted and fixed in the plurality of press-fitting holes formed in the pedestal, it takes time and effort for manufacturing.

JP 2001-15951 A

  The present invention has been made in the background of the above-mentioned circumstances, and a solution to the problem is a pedestal with a terminal having a novel structure capable of efficiently fixing a plurality of substrate terminals to the pedestal without requiring press-fitting. Is to provide. Another object of the present invention is to provide an electrical connection box including a printed circuit board on which the terminal-equipped pedestal having such a novel structure is mounted.

  A first aspect of the present invention relating to a pedestal with a terminal is that a plurality of board terminals in which one end side is a soldering portion soldered to the printed board and the other end side is a connection portion protruding on the printed board are synthesized. In the pedestal with a terminal that penetrates and is fixed to the resin pedestal, the substrate terminal has a crank shape having a bent portion at an intermediate portion in the longitudinal direction, and the pedestal is an insert molded product including the substrate terminal. And the bent portion of the board terminal is exposed on the lower surface of the pedestal superimposed on the printed circuit board, and the other end side of the board terminal penetrates the pedestal with respect to the bent portion of the pedestal. It is characterized by protruding on the upper surface.

  According to the present invention, the pedestal is an insert molded product including a substrate terminal. Thereby, it becomes possible to fix a board | substrate terminal to a base, without requiring press injection, and can avoid the possibility of buckling deformation etc. accompanying press injection. As a result, a metal wire is cut as a substrate terminal, and a pedestal with a terminal can be realized even with a wire terminal that is liable to be buckled and deformed by press fitting or the like because of its extremely small cross-sectional area. In addition, since the pedestal can be formed by inserting a plurality of substrate terminals, the plurality of substrate terminals can be efficiently fixed to the pedestal.

  By the way, when the board terminal is inserted to form the pedestal, the difference in thermal expansion between the board terminal and the pedestal tends to be a problem when the board terminal is soldered to the printed board. That is, in each board terminal, the portion embedded in the pedestal and restrained cannot absorb the thermal deformation of the board terminal, and as a result, the pedestal may be deformed or cracked. Further, due to deformation and damage of the pedestal, it is difficult to ensure the positioning accuracy and holding rigidity of the substrate terminals, and there is a possibility that the connection stability with external electric components cannot be maintained.

  However, according to the present invention, the board terminal has a crank shape, and the bent portion of the board terminal is in an unconstrained state exposed downward from the pedestal. This reduces the possibility that the thermal deformation of the board terminal affects the pedestal or the thermal deformation of the pedestal affects the board terminal due to the heat of soldering or the like. For example, regarding the influence of thermal deformation of the board terminal on the pedestal, if the board terminal is to be deformed in the left-right direction, that is, in the direction perpendicular to the vertical direction within the bending plane of the bending part, the bending part is deformed. By absorbing the thermal deformation of the substrate terminal, the influence on the pedestal can be reduced. Further, regarding the vertical deformation of the substrate terminal, the bent portion of the substrate terminal is in an unconstrained state exposed downward from the pedestal, thereby reducing the influence on the pedestal. As a result, the influence of thermal deformation in any direction on the left and right and up and down of the board terminal is reduced, and the board terminal can be held more stably by suppressing the deformation and damage of the board.

  On the other hand, regarding the influence of the thermal deformation of the pedestal on the board terminal, when the pedestal is thermally deformed and an external force in the left-right direction is exerted on the board terminal, the bent portion of the board terminal is deformed to absorb the external force. I can do it. On the other hand, in the vertical direction, since the bent portion of the board terminal is exposed on the lower surface of the pedestal, the board terminal and the printed board are disposed without the synthetic resin of the pedestal. Thereby, the possibility that the vertical deformation of the pedestal affects the board terminal is also reduced. As a result, the influence of thermal deformation in any direction on the left and right and top and bottom of the pedestal is reduced on the board terminals, and the occurrence of cracks in the soldering part is suppressed, and the electrical connection between the board terminals and the conductive path of the printed board is reduced. Connection reliability can be improved.

  A second aspect of the present invention relating to a pedestal with a terminal is the one described in the first aspect, wherein the bent portion protrudes outward from a side surface of the pedestal, and the protruding end portion of the bent portion One end side extends downward.

  According to this aspect, a soldering part can be provided in the position spaced apart from the side surface of the base. Thereby, the easiness of visual confirmation of the solder rise in a soldering part, etc. can be improved.

  A third aspect of the present invention relating to a pedestal with a terminal is the one described in the first or second aspect, wherein the bent portion exposed on the lower surface of the pedestal constitutes a contact surface to the printed circuit board. It is what.

  According to this aspect, the board terminal is brought into direct contact with the printed board at the bent portion. Thereby, the board terminal can be stably supported by the printed circuit board against the pressing force exerted on the board terminal when an electrical component such as a connector is connected. Further, the amount of protrusion of the pedestal with terminal from the printed circuit board can be suppressed, and the printed circuit board having the pedestal with terminal can be miniaturized.

  According to a fourth aspect of the present invention relating to a pedestal with terminal, in the one according to any one of the first to third aspects, the pedestal is capable of cutting a terminal support portion on which each of the substrate terminals is supported. It is comprised by paralleling via a connection part.

  According to this aspect, a base connector having a desired number of board terminals arranged at a predetermined pitch can be obtained by arranging the terminal support portions in parallel at a predetermined pitch and cutting an arbitrary connecting portion. . Accordingly, for example, by forming the terminal support portions at the same pitch as the arrangement pitch of the female terminals of the counterpart connector, it is possible to provide a versatile pedestal that is compatible with the pitch of the counterpart connector. Further, the insert type allows a pedestal provided with a predetermined number of terminal support portions to be continuously formed, and a longer pedestal can be formed with excellent manufacturing efficiency.

  The present invention relating to an electrical junction box is an electrical junction box in which a printed circuit board is accommodated in a case, and the terminal-equipped pedestal according to any one of the first to fourth aspects is mounted on the printed circuit board. Positioning holes are formed at corresponding positions of the base and the printed circuit board, and positioning protrusions protruding from the case are arranged through the positioning holes of the base and the printed circuit board. It is characterized by being installed.

  According to the electrical junction box having the structure according to the present invention, the pedestal, the printed board, and the case can be positioned relative to each other by inserting the positioning protrusions of the case into the positioning holes of the pedestal and the printed board. This suppresses misalignment between the pedestal and the printed circuit board, thereby suppressing the occurrence of solder cracks on the circuit board terminals, positioning the circuit board terminals on the electrical component mounting portion provided on the case, and Insertion and extraction can be performed more stably. The positioning holes formed on the pedestal and the printed circuit board are inserted into the pedestal with the terminal and the printed circuit board by inserting the positioning protrusions formed on the jig when soldering the pedestal with terminal to the printed circuit board, for example. It can also be used for positioning.

  According to the present invention relating to a pedestal with a terminal, a plurality of substrate terminals can be efficiently fixed to the pedestal without fear of buckling deformation or the like due to press-fitting by using the pedestal as an insert-molded product including the substrate terminal. And by making the board | substrate terminal into the crank shape, the thermal deformation of a board | substrate terminal can be absorbed in a bending part. Furthermore, since the bent portion is exposed on the lower surface of the pedestal, the influence of the thermal deformation of the substrate terminal can be skillfully released from the pedestal. Thereby, the deformation | transformation and damage of the base by the thermal deformation of a board | substrate terminal can be suppressed, and a board | substrate terminal can be supported more stably. Further, according to the present invention relating to the electrical junction box, the positioning projection formed on the case is inserted into the positioning holes formed on the pedestal and the printed circuit board, so that the pedestal with terminal, the printed circuit board, and the case are mutually connected. Can be positioned accurately.

The perspective view which shows the principal part of the electrical junction box as one Embodiment of this invention. II-II sectional drawing in FIG. III-III sectional drawing in FIG. The perspective view of the printed circuit board which comprises the electrical-connection box shown in FIG. The top view of the base with a terminal as one Embodiment of this invention. The bottom view of the base with a terminal shown in FIG. The front view of the base with a terminal shown in FIG. Explanatory drawing for demonstrating the manufacturing method of the base with a terminal shown in FIG. Explanatory drawing of the process which continues from FIG. Explanatory drawing for demonstrating the assembly method to the printed circuit board of the base with a 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 one Embodiment of this invention is shown in FIGS. 1-3. The electrical junction box 10 has a structure in which a printed circuit board 14 on which a pedestal 12 with a terminal as an embodiment of the present invention is mounted is accommodated between an upper case 16 and a lower case (not shown).

  FIG. 4 shows the printed circuit board 14. A plurality of through holes 18 are provided in the printed circuit board 14 so as to be arranged in two rows at predetermined intervals. Solder portions 22 of the plurality of substrate terminals 20 provided on the pedestal 12 with terminals are provided in each through hole 18. It is inserted and soldered.

  The base 12 with a terminal is shown in FIGS. The pedestal 12 with a terminal has a structure in which a plurality of substrate terminals 20 are fixed in a penetrating state at predetermined intervals in the longitudinal direction of the pedestal 24 having a long shape. The pedestal 24 has a substantially rectangular block shape formed of a non-conductive synthetic resin. The pedestal 24 is formed with a circumferential groove 26 having a V-shaped cross section that is continuous over the entire circumference at predetermined intervals in the longitudinal direction. Thus, the pedestal 24 has a connection portion 28 in which a portion where the circumferential groove 26 is formed is partially reduced in cross-sectional area. And between each connection part 28 is made into the terminal support part 30, and the base 24 is comprised by the some terminal support part 30 being paralleled via the connection part 28. As shown in FIG.

  A pair of substrate terminals 20 and 20 are fixedly supported on each terminal support portion 30. Each board terminal 20 has the same shape. The substrate terminal 20 is formed by cutting, for example, a metal wire having a plating layer made of a metal material such as tin or gold to a predetermined length over the entire surface of a base material of a metal material such as copper or iron. The formed wire rod terminals are used. As the cross-sectional shape of the substrate terminal 20, a rectangular shape such as a square or a rectangle, a polygonal shape, a circular shape including an ellipse, or any other shape can be appropriately employed. In the present embodiment, approximately 0.5 mm × approximately It has an extremely small substantially square cross section of 0.4 mm. The substrate terminal 20 is not necessarily limited to one formed from a metal wire, and may be a plate-like one formed by punching a metal plate, for example.

  One end of the substrate terminal 20 is a soldering portion 22, and the other end is a connection portion 32. Further, as is apparent from FIG. 7 and the like, the board terminal 20 has a crank shape in which a bent portion 34 is formed between the soldering portion 22 and the connecting portion 32.

  A pair of such substrate terminals 20 is fixed to the terminal support 30. The board terminal 20 is fixed to the pedestal 24 at the bent portion 34, and the bent portion 34 projects from the side surface 36 a (36 b) of the pedestal 24 to the outside in the width direction of the pedestal 24 (both left and right in FIG. 7). Thus, the soldering portion 22 extends from the protruding end portion of the bent portion 34 to the lower side of the pedestal 24 (downward in FIG. 7). Further, the connecting portion 32 side from the bent portion 34 protrudes upward (upward in FIG. 7) from the upper surface 38 of the base 24. As a result, the pair of substrate terminals 20 and 20 are fixed to the terminal support 30 in a penetrating state with the respective bent portions 34 and 34 protruding in opposite directions in the width direction of the base 24. 24, a plurality of substrate terminals 20 are provided at predetermined intervals in the longitudinal direction of the pedestal 24 in two rows. The arrangement pitch of the board terminals 20 in the longitudinal direction of the pedestal 24 is made equal to the arrangement pitch of the through holes 18, so that the soldering portions 22 described later can be easily inserted into the through holes 18. Further, the bent portion 34 of the board terminal 20 is positioned on the same plane as the lower surface 40 of the pedestal 24, and the bent portion 34 is exposed on the lower surface 40 of the pedestal 24.

  The pedestal 24 is provided with a positioning hole 42 on each connecting portion 28 in the central portion in the width direction (vertical direction in FIG. 5). The positioning hole 42 is a circular through hole penetrating in the thickness direction of the base 24 (vertical direction in FIG. 7).

  In addition, the base 12 with a terminal is suitably manufactured by resin-molding the base 24 by using the plurality of substrate terminals 20 as inserts. For example, as shown in FIG. 8A, first, a plurality of cutting wires 44 are set on a lower mold 46 as a mold. The cutting wire 44 is the one before the bent portion 34 of the board terminal 20 is formed, and has a linear shape cut out from the metal wire with a predetermined length. Then, both edge portions in the longitudinal direction are tapered by crushing or the like, so that the soldering portion 22 is formed at one end portion and the connection portion 32 is formed at the other end portion. On the other hand, a molding surface 48 having a shape corresponding to the upper surface 38 of the base 24 is formed on the upper end surface of the lower mold 46. A plurality of terminal insertion holes 50 are formed in the molding surface 48 at predetermined intervals in two rows. The cutting wire 44 is inserted into each terminal insertion hole 50 from the connection portion 32 side. Thereby, each cutting wire 44 is set in the lower mold | type 46 in the state which protruded the soldering part 22 from the molding surface 48. FIG.

  Next, as shown in FIG. 8 (b), when a jig (not shown) is pressed against the cutting wire 44 set on the lower mold 46, the protruding portion of the cutting wire 44 from the forming surface 48 becomes the forming surface. It is bent at a right angle toward the outside of 48. As a result, the soldered portions 22 of the cutting wire rods 44 in both rows protrude to the opposite sides.

  Then, as shown in FIG. 8C, the horizontal molds 52a and 52b are assembled to both side surfaces of the lower mold 46, and the upper mold 54 is assembled from above. A plurality of terminal receiving grooves 55 are formed on the upper end surfaces of the horizontal molds 52a and 52b. Further, in each of the horizontal molds 52a and 52b, the side surfaces 36a and 36b of the pedestal 24 are provided at the upper end portions of the side surfaces that project from both sides of the molding surface 48 of the lower mold 46 in the assembled state to the lower mold 46. Molding surfaces 56a and 56b having corresponding shapes are formed. On the other hand, a molding surface 58 having a shape corresponding to the lower surface 40 of the base 24 is formed on the lower end surface of the upper mold 54. Further, a plurality of protrusions 59 having a circular cross section corresponding to the positioning hole 42 protrude toward the lower mold 46 at positions corresponding to the positioning holes 42 of the base 24 on the molding surface 58. When these horizontal molds 52a, 52b and the upper mold 54 are assembled to the lower mold 46, the molding cavities corresponding to the shape of the base 24 are formed by the molding surfaces 48, 56a, 56b, 58 of the molds 46, 52a, 52b, 54. 60 is defined. Each cutting wire 44 is accommodated in the terminal receiving groove 55 of the horizontal molds 52 a and 52 b, and the soldering portion 22 protrudes outside the horizontal molds 52 a and 52 b through the terminal receiving groove 55. Each cutting wire 44 is supported in the terminal receiving grooves 55 of the horizontal molds 52 a and 52 b and lifted from the molding surface 48 of the lower mold 46, thereby contacting the molding surface 58 of the upper mold 54 in the molding cavity 60. It is supported in the state.

  Next, as shown in FIG. 9A, the jigs 62a and 62b are assembled from both sides of the horizontal molds 52a and 52b, so that the jigs 62a and 62b are formed on the protruding portions of the cutting wire 44 from the horizontal molds 52a and 52b. 62b is pressed and the soldering part 22 is bent to the upper mold | type 54 side. Thereby, the bent part 34 is formed in the cutting wire 44, and the crank-shaped board | substrate terminal 20 is formed.

  And the base 24 is shape | molded by filling the resin material in the shaping | molding cavity 60, and hardening. At the same time, the plurality of substrate terminals 20 are inserted into the pedestal 24 at the bent portion 34, and are fixed to the pedestal 24 in a penetrating state in which the soldering portion 22 and the connection portion 32 protrude from the pedestal 24. In this way, the pedestal 12 with terminals is formed. Thereafter, as shown in FIG. 9B, the upper mold 54 and the horizontal molds 56 a and 56 b are removed from the lower mold 46, and the pedestal 12 with terminals is removed from the lower mold 46. In addition, in the state where the longitudinal end of the base 24 after molding faces the molding cavity 60, the resin material is filled and cured in the molding cavity 60 in the same manner as described above, and the base 24 and the newly molded base 24 are formed. It is also possible to manufacture the pedestal 12 with a longer terminal by continuously forming the pedestal 24 by connecting the pedestals 24 formed in the above. In such a case, the positioning hole 42 of the pedestal 24 can be used for feeding the pedestal 24.

  As shown in FIGS. 1 to 4, the pedestal 12 with terminals is soldered by inserting the soldering portions 22 of the board terminals 20 protruding from the pedestal 24 into the through holes 18 of the printed board 14. As a result, the printed circuit board 14 is assembled. The pedestal 12 with terminals may be formed by previously forming a pedestal 24 to which the same number of substrate terminals 20 as the through holes 18 are fixed, or a long pedestal having more substrate terminals 20 than the through holes 18. 24 may be cut by the connecting portion 28 to cut out the same number of substrate terminals 20 as the through holes 18. As is clear from FIG. 2, the pedestal 12 with a terminal has the lower surface 40 of the pedestal 24 superimposed on the printed circuit board 14 in the assembled state to the printed circuit board 14. Thereby, the bent portion 34 of the board terminal 20 exposed on the lower surface 40 of the pedestal 24 is directly superimposed on the printed circuit board 14 without interposing the resin of the pedestal 24.

  In addition, the assembly | attachment to the printed circuit board 14 of the base 12 with a terminal is performed suitably as follows, for example. First, a jig 64 shown in FIG. The jig 64 is provided with a pair of positioning protrusions 66 and 66 separated by a predetermined distance. A pair of clearance grooves 68, 68 are formed between the positioning protrusions 66, 66 in parallel with each other so as to extend between the positioning protrusions 66, 66. Further, a pair of positioning pins 70, 70 project between the escape grooves 68, 68. The positioning pins 70 and 70 are formed at positions corresponding to the positioning holes 42 and 42 located at both ends in the longitudinal direction of the base 24 of the base 12 with terminal.

  Then, as shown in FIG. 10B, the pedestal 12 with a terminal is assembled to the jig 64. The pedestal 12 with terminal is assembled from the upper surface 38 side of the pedestal 24 so as to be fitted between the positioning protrusions 66 and 66 of the jig 64. Then, the positioning pins 70 and 70 of the jig 64 are inserted into the positioning holes 42 and 42 formed at both ends in the longitudinal direction of the pedestal 24 and protrude from the lower surface 40 of the pedestal 24. Thereby, the pedestal 12 with terminal is positioned on the jig 64. Further, the connection portion 32 of the board terminal 20 protruding from the upper surface 38 of the base 24 is inserted into the escape grooves 68 and 68.

  Next, as shown in FIG. 10C, the printed circuit board 14 is superimposed on the pedestal 12 with a terminal set on the jig 64. Positioning holes 71 and 71 having substantially the same size as the positioning holes 42 and 42 penetrate the printed circuit board 14 at positions corresponding to the positioning holes 42 and 42 formed at both ends in the longitudinal direction of the base 24. It is installed. The positioning holes 71 and 71 of the printed circuit board 14 are inserted into the positioning pins 70 and 70 of the jig 64 protruding from the base 24. As a result, the printed circuit board 14 and the pedestal 12 with terminals are positioned relative to each other, and the soldering portions 22 of the board terminals 20 on the pedestal 12 with terminals are respectively inserted into the through holes 18 of the printed circuit board 14. Then, by soldering the soldering portion 22, the board terminal 20 is electrically connected to a printed wiring (not shown) as a conductive path provided on the printed board 14, and the pedestal 12 with terminal is connected to the printed board 14. To be implemented. In the assembled state to the printed circuit board 14, the connecting portion 32 protrudes from the upper surface 38 of the base 24 toward the upper side of the printed circuit board 14 (upward in FIG. 2).

  An upper case 16 is superimposed on such a printed circuit board 14. The upper case 16 is made of a nonconductive synthetic resin. As shown in FIG. 1, the upper case 16 is provided with a connector housing portion 76 including a connector hood 74 having a rectangular peripheral wall shape protruding from the outer surface of the top plate 72. Further, as shown in FIG. 3, the connector accommodating portion 76 has a position corresponding to the positioning holes 42 and 42 located at both ends in the longitudinal direction of the pedestal 24 in the pedestal 12 with terminals from the inner surface of the top plate 72. A pair of positioning protrusions 78, 78 projecting is formed. Although not shown, a plurality of terminal insertion holes that penetrate the top plate 72 are formed in the connector hood 74.

  Such an upper case 16 is superimposed on the printed circuit board 14. As a result, the board terminal 20 in the pedestal 12 with the terminal is inserted into the terminal insertion hole penetrating the top plate 72, and the connection portion 32 projects out of the upper case 16 in the connector hood 74. The top plate 72 of the upper case 16 is overlaid on the upper surface 38 of the pedestal 24 of the pedestal 12 with terminals. Further, the positioning protrusions 78 and 78 protruding from the top plate 72 are inserted through the positioning holes 42 and 42 of the pedestal 24 in the pedestal 12 with terminals so that the protruding portion from the lower surface 40 of the pedestal 24 is The printed circuit board 14 is inserted into the positioning holes 71, 71.

  According to the terminal-equipped pedestal 12 having such a structure, a desired number of substrate terminals 20 can be easily cut out by cutting the pedestal 24 at the connecting portion 28. Since the pedestal 24 is an insert-molded product including the substrate terminals 20, the plurality of substrate terminals 20 can be fixed to the pedestal 24 efficiently. In particular, in the present embodiment, the plurality of cutting wires 44 set on the lower mold 46 are bent to form the substrate terminals 20, whereby the plurality of substrate terminals 20 can be simultaneously formed, resulting in better manufacturing. Efficiency can be obtained. Further, compared with a case where a press-fitting hole is provided in the pedestal and the board terminal is press-fitted, it is possible to avoid the possibility that the board terminal buckles, so that the board terminal 20 having an extremely small cross-sectional area as in the present embodiment. Can be manufactured with good quality.

  Further, when the board terminal 20 attempts to thermally expand or contract in the left-right direction (left-right direction in FIG. 2) of the pedestal 24 due to temperature changes during soldering or in-vehicle, the bent portion 34 is deformed to deform the board. The deformation of the terminal 20 can be absorbed and the relative position of the soldering part 22 and the connection part 32 can be maintained more stably. Further, when the board terminal 20 is to be deformed in the vertical direction of the pedestal 24 (vertical direction in FIG. 2), the bent portion 34 is exposed on the lower surface 40 of the pedestal 24. The influence of the directional deformation on the pedestal 24 can be reduced. Thereby, the possibility that the pedestal 24 is deformed due to thermal deformation of the board terminal 20 can be reduced, the deformation and damage of the pedestal 24 can be suppressed, and the holding effect of the board terminal 20 can be secured more stably. I can do it.

  On the other hand, when the pedestal 24 is thermally expanded or thermally deformed due to a temperature change during soldering or in-vehicle, and an external force is exerted on the board terminal 20 in the left-right direction (left-right direction in FIG. 2), the bent portion 34 is By deforming, external force can be absorbed. Further, since the pedestal 24 is not interposed between the bent portion 34 and the printed circuit board 14, the pedestal 24 may be thermally deformed and an external force in the vertical direction (vertical direction in FIG. 2) may be exerted on the board terminal 20. It can be reduced. Thereby, the external force exerted on the board terminal 20 due to the thermal deformation of the base 24 is reduced, and the occurrence of solder cracks in the board terminal 20 can be suppressed.

  In addition, according to the present embodiment, the bent portion 34 of the board terminal 20 is superimposed on the printed board 14 without the pedestal 24 interposed. Thereby, when a connector (not shown) is connected to the connection portion 32 and the board terminal 20 is pushed into the printed board 14 side, the lower surface of the bent portion 34 exposed to the lower surface 40 of the base 24 is the contact surface 82. Thus, by contacting the printed circuit board 14 and being supported by the printed circuit board 14, the risk of solder cracks can be further reduced. On the other hand, when the connector is removed, the board terminal 20 can be supported against the pulling force exerted on the board terminal 20 by pressing the base 24 with the top plate 72 of the upper case 16. ing.

  Further, since the bent portion 34 is superimposed on the printed circuit board 14, the protruding dimension of the substrate terminal 20 from the printed circuit board 14 can be suppressed, and the thickness dimension of the electrical connection box 10 (in the vertical direction in FIG. 2). (Dimension) can be reduced. Further, since the bent portion 34 protrudes from the pedestal 24 and the soldering portion 22 is spaced apart from the side of the pedestal 24, the visibility of the solder rise at the soldering portion 22 can be improved.

  Furthermore, when the upper case 16 is assembled to the printed circuit board 14, the positioning projections 78, 78 protruding from the upper case 16 are positioned between the positioning holes 42, 42 of the pedestal 24 in the pedestal 12 with terminals and the printed circuit board 14. It is inserted into both the holes 71 and 71 for use. Thereby, position shift with the base 12 with a terminal and the printed circuit board 14 can be suppressed, and the risk of the solder crack at the time of insertion / extraction of an electrical component can be reduced. In addition, the connector mounting portions of the pedestal 12 with terminals and the upper case 16 can be positioned with high precision, and electrical components can be inserted into and removed from the board terminals 20 more stably. In addition, when assembling the pedestal 12 with terminals to the printed circuit board 14, the positioning pins 70 of the jig 64 are inserted into the positioning holes 42, 72 provided in the pedestal 12, thereby the terminal pedestal 12 and the printed circuit board 14. Can be easily and accurately aligned.

  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 bent portion 34 in the above embodiment does not necessarily need to be able to contact the printed circuit board 14. The bent portion exposed from the pedestal 24 is formed by projecting a leg portion that contacts the printed circuit board 14 on the pedestal 24. The portion 34 may be disposed with a gap with respect to the printed circuit board 14.

10: Electrical connection box, 12: Base with terminal, 14: Printed circuit board, 16: Upper case (case), 20: Board terminal, 22: Solder part, 24: Base, 28: Connection part, 30: Terminal support part 32: connection portion, 34: bent portion, 36a, b: side surface, 38: upper surface, 40: lower surface, 42: positioning hole (pedestal), 71: positioning hole (printed circuit board), 78: positioning protrusion, 82 : Contact surface

Claims (5)

A plurality of board terminals, one end of which is a soldering part soldered to the printed circuit board and the other end of which is a connection part protruding on the printed circuit board, with a terminal penetrating and fixed to a base made of synthetic resin On the pedestal,
The board terminal has a crank shape having a bent portion at an intermediate portion in the length direction, the base is an insert-molded product including the board terminal, and a lower surface of the base superimposed on the printed board. The pedestal with a terminal, wherein the bent portion of the board terminal is exposed, and the other end side of the bent portion of the board terminal penetrates the pedestal and protrudes from an upper surface of the pedestal.   The pedestal with a terminal according to claim 1, wherein the bent portion protrudes outward from a side surface of the pedestal, and the one end side extends downward from a protruding end portion of the bent portion.   The pedestal with a terminal according to claim 1 or 2, wherein the bent portion exposed on the lower surface of the pedestal constitutes a contact surface to the printed circuit board.   The pedestal with a terminal according to any one of claims 1 to 3, wherein a plurality of the pedestals are arranged in parallel through a connecting portion capable of cutting a terminal support portion on which each of the substrate terminals is supported. In an electrical junction box containing a printed circuit board in a case,
The pedestal with terminal according to any one of claims 1 to 4, is mounted on the printed circuit board,
Positioning holes are respectively formed at corresponding positions of the pedestal and the printed circuit board, and positioning protrusions protruding from the case are disposed through the positioning holes of the pedestal and the printed circuit board. An electrical junction box characterized by being made.

Images