JP2016152214A - Board straight insertion wire and board straight insertion connector using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a board straight insertion wire of novel structure, capable of constructing the connection structure of an external wire and a printed board, where the projection height above the printed board is suppressed by a small number of components, and to provide a board straight insertion connector using the same.SOLUTION: A board straight insertion wire 10 press-fitted in the through hole 60 of a printed board 58, and connected conductively with a conducting path exposed to the inner surface of the through hole 60 includes a covered conductor 12, and a terminal fitting 20 crimped to a core wire 18 exposed by stripping an insulation coating 16 at the terminal of the covered conductor 12. Wire crimp parts 24, 26 to be crimped to the covered conductor 12 are provided on the proximal end side 22 of the terminal fitting 20, and a press contact part 30 press fitted in the through hole 60 and brought into pressure contact with the conducting path is provided on the distal end side 28 of the terminal fitting 20.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a board direct insertion wire connected to a conductive path of a printed board and a board direct insertion connector using the same.

  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 at one end to a conductive path of the printed circuit board. And the connector provided in the terminal of an external electric wire is connected with respect to the other end side of these board | substrate terminals, and an external electric circuit is connected to the electric circuit of a printed circuit board.

  By the way, in order to realize such a connection structure between an external electric wire and a printed circuit board, as shown in Japanese Patent Application Laid-Open No. 2008-35669 (Patent Document 1), the printed circuit board is projected to be connected to a conductive path. A plurality of board terminals that are soldered are essential, and a synthetic resin pedestal that stably holds the plurality of board terminals on the printed board and supports the connection load of the connector is often required.

  However, since the plurality of board terminals projecting on the printed circuit board and the resin pedestal supporting the same protrude on the printed circuit board at a predetermined height, the height of the electrical junction box that accommodates them is also increased. . Therefore, there has been a case where it is not possible to sufficiently meet the demands for reducing the height and size of the electrical junction box accompanying the recent increase in vehicle density. In addition, the process of press-fitting and fixing a plurality of substrate terminals to the pedestal or soldering to the printed circuit board is complicated, and the problem of high cost is unavoidable.

JP 2008-35669 A

  The present invention has been made in the background of the above-mentioned circumstances, and the problem to be solved is that it is possible to construct a connection structure between an external electric wire and a printed circuit board with a small number of parts and a suppressed protrusion height on the printed circuit board. Another object of the present invention is to provide a board direct insertion wire having a novel structure and a board direct insertion connector using the same.

  A first aspect of the present invention relating to a substrate direct insertion electric wire is a substrate direct insertion electric wire that is press-fitted into a through hole of a printed circuit board and is conductively connected to a conductive path exposed on the inner surface of the through hole. And a terminal fitting crimped to the core wire exposed by peeling off the insulation coating at the end of the coated wire, and wire crimping fixed to the covered wire on the base end side of the terminal fitting On the other hand, a press-contact portion that is press-fitted into the through hole and press-contacted to the conductive path is provided on the distal end side of the terminal fitting.

  According to this aspect, the terminal fitting crimped to the end of the covered electric wire can be directly press-fitted and conductively connected to the conductive path of the through hole of the printed board. Therefore, it is possible to eliminate the need for a substrate terminal that is erected by soldering to a through-hole of a printed circuit board, which has been conventionally required. As a result, the protruding height from the printed circuit board can be reduced by the amount corresponding to the board terminal, and the connection structure between the external electric wire and the printed circuit board can be reduced in height and size. In addition, since the board terminals and the pedestal are not required and the soldering process is also unnecessary, it is possible to advantageously achieve simplification of the manufacturing process, simplification and weight reduction of the connection structure, and reduction in manufacturing cost.

  According to a second aspect of the present invention relating to a substrate direct insertion electric wire, in the substrate direct insertion electric wire according to the first aspect, the press contact portion has a hollow cylindrical shape, and the intermediate portion in the axial direction of the press contact portion. The portion is provided with a plurality of elastic protrusions that protrude outward in a direction perpendicular to the axial direction and can be bent and deformed inward in the direction orthogonal to the axial direction, separated from each other in the circumferential direction. Further, both end portions in the axial direction of the elastic protrusions are connected and fixed to a pair of fixing portions provided at both ends in the axial direction of the press contact portion.

  According to this aspect, the press contact portion is configured to include a plurality of elastic protrusions that are bent and deformed by press-fitting into the through holes, and the plurality of elastic protrusions are provided separately from each other in the circumferential direction. As a result, it is possible to realize a reliable conductive connection by a plurality of elastic protrusions while reducing the force required for press-fitting the press-contact portion into the through hole. In addition, since each elastic protruding piece is connected and fixed to a pair of fixing portions provided at both ends in the axial direction of the press contact portion, the elastic protruding piece remains extended in the axial direction by press-fitting. Therefore, the stable spring property and pressure contact force of the elastic protruding piece can be ensured.

  A third aspect of the present invention relating to a substrate direct insertion electric wire is the substrate direct insertion electric wire according to the second aspect, wherein the core wire is inserted and disposed inside the press contact portion, and the pair of press contact portions The fixed part is pressed against the core wire.

  According to this aspect, the durability and rigidity of the press contact portion can be improved by inserting and arranging the core wire in the internal space of the hollow cylindrical press contact portion and pressing the pair of fixed portions of the press contact portion against the core wire. ing. In particular, by bringing the pair of fixed portions of the pressure contact portion into pressure contact with the core wire, it is possible to simultaneously improve the conduction stability of the terminal fitting with respect to the core wire.

  According to a fourth aspect of the present invention relating to a substrate direct insertion electric wire, in the substrate direct insertion electric wire according to any one of the first to third aspects, a tapered insertion guide is provided at a distal end portion of the press contact portion. It is what.

  According to this aspect, since the insertion of the press contact portion into the through hole is guided by the insertion guide, a smoother press-fitting operation can be performed.

  A fifth aspect of the present invention relating to a board direct insertion electric wire is the board direct insertion electric wire according to any one of the first to fourth aspects, wherein the terminal fitting abuts against the printed board and the press contact portion. The contact protrusion which prescribes | regulates the insertion amount to the said through hole is included.

  According to this aspect, the amount of insertion of the pressure contact portion into the through hole can be kept constant by merely bringing the contact protrusion of the terminal fitting into contact with the printed circuit board, and the pressure contact state between the pressure contact portion and the conductive path is desired. Can be stably maintained in the range.

  In the first aspect of the present invention relating to the board direct insertion connector, the terminal fitting of the terminal-attached electric wire in which the terminal fitting is crimped to the end of the covered electric wire is accommodated and arranged in the terminal accommodating hole penetrating the connector housing. In the connector housing, the through hole direction of the terminal receiving hole is used as the electric wire with terminal, using a board direct insertion electric wire press-fitted into the through hole of the printed board according to any one of the first to fifth aspects. The one surface facing the printed circuit board is the surface facing the printed circuit board, while the other surface is the wire drawing surface, and the board direct insertion wire inserted from the opening of the wire drawing surface of the terminal accommodating hole The terminal fitting is received and arranged in the terminal receiving hole in a state in which the pressure contact portion protrudes from an opening of the terminal receiving hole on the printed board facing surface, and the connector housing It is possible to connect directly to the printed circuit board by press-fitting the press contact portion protruding from the printed circuit board facing surface into the through hole with the printed circuit board facing surface of the ging facing the printed circuit board. .

  According to this aspect, by using the board direct insertion electric wire of the present invention, the connector in which the terminal fitting crimped to the end of the covered electric wire is accommodated in the connector housing is directly press-fitted into the through hole of the printed board, and the printed board It is possible to connect the connector directly. Therefore, the connection structure between the connector and the printed circuit board can be constructed without the need for a board terminal that is erected by soldering to the through hole of the printed circuit board, which is conventionally required. As a result, the protruding height from the printed circuit board can be reduced by the amount corresponding to the board terminal, and the connection structure between the external electric wire and the printed circuit board can be reduced in height and size. In addition, if the board direct connector of the present invention is used, board terminals and pedestals are not required, and a soldering process can be eliminated. Therefore, in the connection structure between an external electric wire and a printed board, the manufacturing process is simplified and the connection structure is simplified. Can be advantageously achieved in terms of weight reduction and weight reduction, and thus reduction in manufacturing cost.

  According to a second aspect of the present invention relating to a board direct insertion connector, in the board direct insertion connector according to the first aspect, the printed circuit board facing surface of the connector housing is fitted to the printed board. A fitting projection to be fitted into the hole is provided to project.

  According to this aspect, the positioning of the connector housing with respect to the printed board can be realized at low cost and stably by simple fitting holes and fitting protrusions.

  According to a third aspect of the present invention relating to the board direct insertion connector, in the board direct insertion connector according to the first or second aspect, the terminal fitting is accommodated in the terminal accommodation hole by being elastically deformed. Is engaged and engages with an engaging portion provided in the terminal receiving hole by elastic return to prevent the terminal fitting from being pulled out from the opening of the wire drawing surface of the connector housing. A piece is provided.

  According to this aspect, by providing the locking piece on the terminal fitting, it is possible to prevent the terminal fitting from being pulled out of the connector housing due to the tensile force transmitted to the electric wire, and to advantageously ensure the conduction stability of the board direct insertion connector. be able to.

  According to the present invention relating to a board direct insertion electric wire, a terminal fitting crimped to a terminal of a covered electric wire can be directly press-fitted into a conductive path of a through hole of a printed circuit board to be conductively connected. Therefore, it is possible to eliminate the need for a substrate terminal that is erected by soldering to a through-hole of a printed circuit board, which was conventionally required. Therefore, the protruding height from the printed circuit board can be reduced by the amount corresponding to the board terminal, and the connection structure between the external electric wire and the printed circuit board can be reduced in height and size. In addition, since the board terminals and pedestals are not required, and the soldering process is also unnecessary, simplification of the manufacturing process, simplification and weight reduction of the connection structure, and reduction in manufacturing cost can be advantageously achieved. Further, according to the present invention relating to the board direct insertion connector, the board direct insertion connector is directly connected to the through hole of the printed circuit board by projecting the pressure contact portion from the connector housing using the board direct insertion electric wire of the present invention. Thus, the same effect as that of the board direct insertion electric wire can be obtained.

The perspective view which shows the board | substrate direct insertion electric wire as one Embodiment of this invention. The side view (a) and back view (b) of FIG. FIG. 4 is a development view for explaining a method of manufacturing the board direct insertion electric wire shown in FIG. 1 ((a) after press punching, (b) a state where a covered electric wire is placed, (c) after assembly). The perspective view which shows the state by which the board | substrate direct insertion electric wire shown in FIG. The front view of FIG. The perspective view which shows the board | substrate direct insertion connector by which the board | substrate direct insertion electric wire of this embodiment was accommodated and arrange | positioned. The perspective view seen from the other direction of the board | substrate direct insertion connector shown in FIG. The perspective view which shows the state in which the board | substrate direct insertion connector shown in FIG. 6 is accommodated in an electrical-connection box. The perspective view which shows the IX-IX cross section in FIG. 8 (however, after accommodation). The perspective view which shows the XX cross section in FIG. 8 (however, after accommodation).

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

  First, the board | substrate direct insertion electric wire 10 as one Embodiment of this invention is shown in FIGS. The board direct insertion electric wire 10 includes a covered electric wire 12 and a terminal fitting 20 that is crimped to the core wire 18 exposed by peeling off the insulating coating 16 at the end of the covered electric wire 12. The covered electric wire 12 has a structure in which a core wire 18 obtained by bundling a plurality of metal wires such as copper, aluminum, or the like, which is a conductor, is covered with an insulating coating 16 having an electrical insulating property such as ethylene resin or styrene resin. Has been. In the following description, the length direction and the axial direction refer to the vertical direction in FIG. 2, and the width direction refers to the horizontal direction in FIG.

  On the base end side 22 of the terminal fitting 20, a cover crimping portion 24 that is a wire crimping portion that is crimped to the insulating coating 16 of the covered wire 12 and a core wire 18 that extends from the end of the insulating coating 16 are crimped. A core wire crimping portion 26 is provided as a wire crimping portion. In addition, the cover crimping portion 24 is provided with a substantially rectangular flat-plate-like locking piece 27 extending from the base end portion of the cover crimping portion 24 to the base end side (the upper side in FIG. 2) obliquely outward. Yes. On the other hand, a pressure contact portion 30 is provided on the distal end side 28 of the terminal fitting 20.

  As shown in FIG. 1, the press contact part 30 has a substantially hollow cylindrical shape in which the core wire 18 exposed at the end of the covered electric wire 12 is inserted and arranged. At the intermediate portion in the axial direction of the pressure contact portion 30, there are provided substantially vertically long plate-like elastic protrusions 32 at four positions spaced apart from each other in the circumferential direction of the pressure contact portion 30, and both axial ends of each elastic protrusion 32. The portion is connected and fixed to a pair of fixing portions 34 and 34 each having a substantially rectangular tube shape provided at both ends of the press contact portion 30 in the axial direction. More specifically, the elastic protruding piece 32 is formed so as to be able to bend and deform in the direction orthogonal to the axial direction by projecting the central portion in the axial direction outward in the direction orthogonal to the axial direction of the press contact portion 30. ing.

  Further, the front surface 36 (the surface shown in FIG. 1) and the back surface 38 (the surface shown in FIG. 2B) of the pair of fixing portions 34 and 34 are respectively recessed toward the core wire 18 to be core wire 18. A pair of fitting portions 40, 40 having a substantially rectangular shape in a plan view and a bottom view are provided. That is, in the fitting portion 40, the pair of fixing portions 34, 34 of the press contact portion 30 are fixed and connected to the core wire 18.

  In addition, the distal end portion of the fixing portion 34 fixed to the distal end side (the lower side in FIG. 1) of the press contact portion 30 extends obliquely inwardly at the distal end side from four locations spaced apart from each other in the circumferential direction. An insertion guide 42 having a substantially rectangular flat plate shape is provided. As a result, the distal end portion of the fixing portion 34 provided with the insertion guide 42 has a tapered shape as a whole. Further, a substantially trapezoidal cross section that protrudes outward in a direction orthogonal to the axial direction of the press contact portion 30 at the distal end portion of the fixed portion 34 fixed to the proximal end side (the upper side in FIG. 1) of the press contact portion 30. A pair of abutting projections 44, 44 are provided.

  Next, the manufacturing method of the board | substrate direct insertion electric wire 10 made into such a structure is demonstrated using FIG. First, as shown in FIG. 3A, a flat plate member 46 is prepared in which a metal plate having a surface of a copper plate or the like plated with tin or the like is press-punched. The flat plate member 46 is configured by individual metal flat plates 48 as metal materials forming the terminal fitting 20 being connected to the carrier portion 52 via the bridge portion 50 and arranged in a chain.

  Subsequently, as shown in FIG. 3 (b), the covered electric wire 12 is prepared, and the terminal where the insulating coating 16 is peeled and the core wire 18 is exposed is mounted on the central portion in the width direction of the metal flat plate 48. Put. More specifically, the end of the covered electric wire 12 with the core wire 18 exposed is placed so that the insulating coating 16 is placed on the coated crimping portion 24 of the metal flat plate 48, and the core wire 18 is placed on the core wire crimping portion 26. Position and arrange. And the metal flat plate 48 is assembled | attached with respect to the terminal of the covered electric wire 12, as FIG.3 (c) shows. More specifically, first, the covering crimping portion 24 and the core wire crimping portion 26 are crimped using a known crimping device. As a result, the coated crimping portion 24 and the core wire crimping portion 26 are plastically deformed and crimped so as to wrap the insulation coating 16 and the core wire 18 at the end of the coated electric wire 12 from the outer peripheral surface. As a result, the core wire 18, that is, the covered electric wire 12 is electrically connected to the terminal fitting 20. Next, the press contact portion 30 of the metal flat plate 48 is bent into a substantially cylindrical shape and assembled to the core wire 18 of the end of the covered electric wire 12. More specifically, in a state where the pair of circumferential end faces 54 and 54 of the metal flat plate 48 are substantially in contact with each other, the contact portion and the corresponding position on the back surface 38 side are crushed so as to be recessed toward the core wire 18 and pressed. To do. Thereby, a pair of fitting parts 40 and 40 are formed. As a result, the pair of fixing portions 34, 34 of the press contact portion 30 are fixed and connected to the core wire 18. Finally, the carrier portion 52 is cut by the thinned cutting portion 56 of the bridge portion 50, and the remaining bridge portion 50 is bent obliquely outward in the axial direction to form the locking piece 27. As a result, a plurality of (two in FIG. 3) substrate direct insertion wires 10 having the same shape are formed as a single member.

  The board direct insertion electric wire 10 having such a structure is inserted into the through hole 60 of the printed board 58 from the pressure contact portion 30 side of the terminal fitting 20 as shown in FIGS. Since the distal end portion of the pressure contact portion 30 has a tapered shape as a whole by the insertion guide 42, the distal end portion of the terminal fitting 20 serves as a guide to stably insert the board direct insertion wire 10 into the through hole 60. And can be performed efficiently. Note that the amount of insertion of the press-contact portion 30 of the board direct insertion wire 10 into the through hole 60 is defined by the pair of abutting protrusions 44, 44 being in contact with the surface 62 of the printed board 58. Thereby, the press-contact state of the press-contact part 30 and the conductive path described later can be stably held within a desired range.

  In such a state, the four elastic protrusions 32 of the press contact portion 30 of the board direct insertion electric wire 10 are pressed against the inner surface of the through hole 60 by an elastic restoring force based on elastic deformation when the through hole 60 is inserted. The press contact portion 30 of the direct insertion electric wire 10 is press-fitted and fixed to the through hole 60. Thereby, the board direct insertion electric wire 10 is conductively connected to the printed board 58 through the conductive paths (not shown) exposed on the four elastic protrusions 32 of the press contact portion 30 and the inner surface of the through hole 60. .

  According to the board direct insertion electric wire 10 having such a structure, the press-contact portion 30 of the terminal fitting 20 is directly press-fitted into the conductive path (not shown) exposed on the inner surface of the through hole 60 of the printed board 58 to conduct. Can be connected. This eliminates the need for a board terminal that is erected by soldering to the through-hole 60 of the printed circuit board 58, which has been necessary in the past, so that the protruding height from the printed circuit board 58 can be lowered by the amount corresponding to the board terminal. In addition, the connection portion between the wiring from the external device and the printed circuit board 58 can be reduced in height and size. In addition to the board terminals, a pedestal and a soldering process can be dispensed with, so that a reduction in manufacturing costs can be advantageously achieved.

  In addition, the four elastic protrusions 32 that are pressed against the inner surface of the through hole 60 by elastic restoring force based on elastic deformation at the time of insertion of the through hole 60 are provided separately from each other in the circumferential direction. While reducing the force required for press-fitting the press contact portion 30 into the through hole 60, it is possible to realize a reliable conductive connection to the conductive path. In addition, since both end portions in the axial direction of each elastic protruding piece 32 are connected and fixed to the pair of fixing portions 34, 34, the elastic protruding piece 32 is prevented from expanding and contracting in the axial direction due to press-fitting. The stable spring property and pressure contact force of the elastic protrusion 32 can be secured.

  In addition, the core wire 18 exposed at the end of the covered wire 12 is inserted and disposed inside the press-contact portion 30 having a substantially hollow cylindrical shape, and the pair of fixing portions 34 and 34 of the press-contact portion 30 are fitted portions. In 40, it is fixed and connected to the core wire 18. Thereby, the durability and rigidity of the press contact portion 30 are improved, and the conduction stability of the terminal fitting 20 with respect to the core wire 18 is improved at the same time.

  Next, the case where the board direct insertion connector 64 is used as another aspect in which the press contact portion 30 of the board direct insertion electric wire 10 is press-fitted into the through hole 60 of the printed board 58 will be described with reference to FIGS. As shown in FIGS. 6 to 7, the board direct insertion connector 64 includes a connector housing 66 and a terminal fitting 20 that is crimped to the terminal of the covered electric wire 12 with respect to a terminal accommodation hole that is provided through the connector housing 66. Is configured to include a substrate direct insertion electric wire 10 that is housed and arranged.

  The connector housing 66 has a substantially block shape, and is integrally formed of a synthetic resin such as polypropylene (PP) or polyamide (PA) by injection molding or the like. A plurality of terminal receiving holes are formed through the connector housing 66. Specifically, in the printed circuit board facing surface 70 which is one surface facing in the penetrating direction of the terminal housing hole of the connector housing 66, a plurality of substantially circular shapes (12 in this embodiment) open downward. On the other hand, a lower side cavity 72 serving as a terminal accommodating hole is formed. On the wire lead-out surface 74 which is the other surface of the connector housing 66, a plurality of substantially rectangular shapes (12 in this embodiment) open upward. An upper cavity 76 serving as a terminal receiving hole is formed. As shown in FIG. 9, the lower cavity 72 and the upper cavity 76 communicate with each other in the connector housing 66. Moreover, the opening 78 of the upper cavity 76 into which the board direct insertion electric wire 10 is inserted is made larger than the opening 80 of the lower cavity 72 from which the press contact part 30 of the board direct insertion electric wire 10 protrudes. Accordingly, a step 82 is formed at the boundary between the upper cavity 76 and the lower cavity 72. Furthermore, on one side in the width direction of the lower cavity 72 (right side in FIG. 10), a concave groove-like engaging portion 83 that opens inward and downward is formed.

  In addition, a pair of engaging projections 86, 86 having a substantially rectangular shape in a side view project outwardly at a position facing the diagonal direction of the pair of side surfaces 84, 84 in the width direction constituting the connector housing 66. It is installed. In addition, a pair of substantially cylindrical fitting protrusions 88 and 88 project from diagonal positions at both ends in the longitudinal direction of the printed circuit board facing surface 70 of the connector housing 66.

  And the terminal metal fitting 20 of the board | substrate direct insertion electric wire 10 is inserted in the connector housing 66 made into such a structure from the opening part 78 of the electric wire extraction surface 74 of a terminal accommodation hole. At this time, as shown in FIG. 10, the locking piece 27 provided on the terminal fitting 20 is elastically deformed inward in a direction perpendicular to the axial direction, so that the terminal receiving hole can be accommodated. Permissible. Further, when the terminal fitting 20 of the board direct insertion electric wire 10 is pushed in and the locking piece 27 reaches the concave groove-like engaging portion 83 provided in the lower cavity 72, the locking piece 27 is elastically restored. By engaging with the engaging portion 83, the terminal fitting 20 of the board direct insertion electric wire 10 is prevented from coming out from the opening 78 of the electric wire drawing surface 74 of the connector housing 66. As shown in FIG. 9, the insertion amount of the terminal fitting 20 of the board direct insertion electric wire 10 into the terminal accommodation holes 72, 76 is such that the lower end portion of the cover crimping portion 24 of the terminal fitting 20 is at the terminal accommodation hole 72. , 76 is defined by being brought into contact with the step 82. And the terminal fitting 20 of the board direct insertion electric wire 10 is housed and arranged with respect to the terminal accommodation hole in a state where the press contact part 30 protrudes from the opening 80 of the printed board facing surface 70 of the terminal accommodation hole. The board direct insertion connector 64 is completed (see FIG. 7).

  As shown in FIGS. 8 to 10, the board direct connector 64 having such a structure is attached to the connector attachment portion 92 formed in the electrical connection box 90 from the printed board facing surface 70 side. It is like that. Here, the electrical connection box 90 is configured by accommodating a printed circuit board 94 in a case 96 made of synthetic resin. The case 96 is configured to include an upper case 96a and a lower case 96b. For example, the case 96 has a substantially rectangular shallow box shape that opens toward the other side, and the openings are overlapped. By assembling, the electrical connection box 90 in which the printed board 94 is accommodated inside the case 96 is provided. In addition, the case 96 is engaged with each other by, for example, engaging claws (not shown) provided in the upper case 96a being inserted and engaged with engagement frames (not shown) provided in corresponding portions of the lower case 96b. It can be assembled.

  A connector mounting portion 92 is provided on the surface 98 of the upper case 96a. The connector mounting portion 92 includes a peripheral wall portion 100 having a substantially rectangular box shape that opens upward, and a pair of engagements of the board direct insertion connector 64 to be mounted on the peripheral walls facing in the width direction. A pair of engagement frames 102 and 102 are provided at positions corresponding to the protrusions 86 and 86. Further, the bottom wall 104 of the connector mounting portion 92 has twelve insertion holes 106 having a substantially circular cross-sectional shape penetrating in the thickness direction, and a pair of substantially circular cross-sectional shapes having a larger diameter than the insertion hole 106. Insertion holes 108 and 108 are formed.

  On the other hand, the printed board 94 also has twelve through holes 60 and a diameter larger than that of the through holes 60 at the same position as the insertion holes 106 and 108 provided in the bottom wall 104 of the connector mounting portion 92 in a plan view. A pair of fitting holes 112 are provided (see FIG. 9).

  The printed circuit board facing surface 70 of the board direct insertion connector 64 is mounted on the connector mounting section 92 of the electrical connection box 90 having such a structure so as to face the printed circuit board 94, that is, the bottom wall 104 of the connector mounting section 92. . Accordingly, the pair of fitting protrusions 88 and 88 of the board direct insertion connector 64 are inserted through the pair of insertion holes 108 and 108 of the bottom wall 104 of the connector mounting portion 92, and the pair of fittings provided on the printed board 94. It fits in the joint holes 112, 112. More specifically, the pair of fitting projections 88 and 88 of the board direct insertion connector 64 are inserted into the pair of fitting holes 112 and 112 provided in the printed circuit board 94 and protruded from the lower case 96b. By being engaged with the pair of engaging portions 114, 114, it is fitted into the pair of fitting holes 112, 112 of the printed circuit board 94. At the same time, the pair of engaging protrusions 86, 86 of the board direct insertion connector 64 engage with the pair of engagement frames 102, 102 of the connector mounting portion 92, so that the board direct insertion connector 64 is placed in the connector mounting portion 92. It is designed to be housed stably.

  On the other hand, when the printed board facing surface 70 of the board direct insertion connector 64 is mounted to face the printed board 94, that is, the bottom wall 104 of the connector mounting section 92, the press contact portion 30 protruding from the printed board facing surface 70 is attached to the connector mounting. The insertion hole 106 in the bottom wall 104 of the portion 92 is inserted into the through hole 60 of the printed circuit board 94. As a result, the press contact portion 30 of the board direct insertion wire 10 is directly press-fitted to the conductive path (not shown) exposed on the inner surface of the through hole 60 of the printed board 94, that is, connected to the printed board 94. Direct connection can be made without using a substrate terminal or the like.

  According to the board direct insertion connector 64 having such a structure, the board direct insertion electric wire 10 is directly press-fitted into the through hole 60 of the printed board 94 and the board direct insertion electric wire 10 is directly connected to the printed board 94. Since it is the same as the previous time (see FIGS. 4 to 5), the same effect as the previous time can be obtained. That is, since it is possible to eliminate the need for a board terminal that is erected and soldered to the through hole 60 of the printed circuit board 94, which is necessary in the past, the protruding height from the printed circuit board 94 can be lowered by the amount corresponding to the board terminal. Further, it is possible to reduce the height and size of the connection portion between the wiring from the external device and the printed board 94. In addition to the board terminals, a pedestal and a soldering process can be eliminated, so that a reduction in manufacturing cost and the like can be advantageously achieved.

  In addition, the positioning of the connector housing 66 with respect to the printed circuit board 94 is performed with a simple configuration of the pair of fitting holes 112, 112 and the pair of fitting protrusions 88, 88, thereby realizing such positioning at low cost and stably. be able to. Further, the provision of the locking piece 27 on the terminal fitting 20 can prevent the terminal fitting 20 from coming out of the connector housing 66 due to the tensile force transmitted to the covered electric wire 12 of the board direct insertion electric wire 10, and the board direct insertion connector 64. The conduction stability can be advantageously ensured.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited by the specific description. For example, in the above-described embodiment, the terminal fitting 20 is crimped to the end of the covered electric wire 12 with respect to the covered electric wire 12 by two electric wire crimping portions, that is, the coated crimping portion 24 and the core wire crimping portion 26. What is necessary is just to be crimped | bonded to the terminal of the covered electric wire 12 by the crimping | compression-bonding part. For example, when the coated crimping portion 24 is selected as the wire crimping portion, the terminal fitting 20 and the core wire 18 cannot be electrically connected by the core wire crimping portion 26, but the terminal fitting 20 and the terminal fitting 20 are fixed by the fixing portion 34 of the press contact portion 30. Electrical connection with the core wire 18 can be made. Thereby, it is possible to further reduce the height and size of the connection portion between the wiring from the external device and the printed board 58.

10: Board direct insertion wire, 12: Covered wire, 16: Insulation coating, 18: Core wire, 20: Terminal fitting, 22: Base end side, 24: Covered crimping portion (wire crimping portion), 26: Core wire crimping portion (Electric wire) 27: locking piece, 28: tip side, 30: pressure contact part, 32: elastic protrusion, 34: fixing part, 42: insertion guide, 44: contact protrusion, 58, 94: printed circuit board, 60 : Through-hole, 64: board direct insertion connector, 66: connector housing, 70: printed circuit board facing surface (one surface), 72: lower side cavity (terminal receiving hole), 74: wire drawing surface (other surface), 76: upper cavity (terminal receiving hole), 78: opening, 80: opening, 83: engaging portion, 88: fitting protrusion, 112: fitting hole

Claims (8)

A board direct insertion wire that is press-fitted into a through hole of a printed circuit board and is conductively connected to a conductive path exposed on the inner surface of the through hole,
A coated electric wire, and a terminal fitting that is crimped to the core wire exposed by peeling off the insulating coating at the end of the coated electric wire,
On the base end side of the terminal fitting, a wire crimping portion to be crimped and fixed to the covered electric wire is provided, and on the distal end side of the terminal fitting, a press-contact portion that is press-fitted into the through hole and press-contacted to the conductive path is provided. The board direct insertion electric wire characterized by being provided.   The press contact portion has a hollow cylindrical shape, and an intermediate portion in the axial direction of the press contact portion protrudes outward in a direction orthogonal to the axial direction and inward in a direction orthogonal to the axial direction. A plurality of elastic protrusions that can be bent and deformed are provided separately from each other in the circumferential direction, and a pair of axial protrusions of each elastic protrusion are provided at both ends of the pressure contact portion in the axial direction. The board direct insertion electric wire according to claim 1, wherein the electric wire is connected and fixed to a fixed part of the board.   The board direct insertion electric wire according to claim 2, wherein the core wire is inserted and disposed inside the press contact portion, and the pair of fixing portions of the press contact portion are press contacted to the core wire.   The board | substrate direct insertion electric wire of any one of Claims 1-3 in which the taper-shaped insertion guide is provided in the front-end | tip part of the said press-contact part.   The board direct insertion electric wire according to any one of claims 1 to 4, wherein the terminal fitting includes an abutment protrusion that abuts against the printed board and defines an insertion amount of the press contact portion into the through hole. . The terminal fitting of the terminal-attached electric wire, in which the terminal fitting is crimped to the end of the covered electric wire, is accommodated and arranged with respect to the terminal accommodating hole penetrating the connector housing,
While using the board | substrate direct insertion electric wire press-fitted in the through-hole of the printed circuit board of any one of Claims 1-5 as the said electric wire with a terminal,
In the connector housing, one surface facing in the penetrating direction of the terminal accommodation hole is a printed circuit board facing surface, and the other surface is a wire drawing surface,
In the state where the terminal fitting of the board direct insertion electric wire inserted from the opening of the wire lead-out surface of the terminal receiving hole is protruded from the opening of the printed board facing surface of the terminal receiving hole. , The terminal is accommodated with respect to the terminal accommodating hole,
The printed circuit board can be directly connected to the printed board by pressing the press contact portion protruding from the printed board facing surface into the through hole with the printed board facing surface of the connector housing facing the printed board. A board direct connector.   The board direct insertion connector according to claim 6, wherein a fitting projection to be fitted into a fitting hole provided in the printed board is projected on the printed board facing surface of the connector housing.   The terminal metal fitting is allowed to be accommodated in the terminal accommodating hole by elastic deformation, and is elastically restored to engage with an engaging portion provided in the terminal accommodating hole, thereby the terminal metal fitting. The board direct insertion connector according to claim 6 or 7, wherein a locking piece for preventing the connector housing from being pulled out from the opening of the wire drawing surface is provided.

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