JP2012060783A - Electric connection box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric connection box which reduces the used amount of a heat resistant resin and includes a connector reception part having high connector positioning accuracy.SOLUTION: An electric connection box 1 includes a case 4, a substrate 5, and a connector reception part 9 which is composed of terminals 6 that are electrically connected to the substrate 5 by soldering and a housing 7. The housing 7 comprises a bottom wall 70 holding the terminals 6 and a cylindrical peripheral wall 71 enclosing the terminals 6 protruding from the bottom wall 70. Further, the bottom wall 70 and a pair of guide walls 72, which is erected from both end parts of the bottom wall 70 and comprises part of the peripheral wall 71, are integrally molded by using a heat resistant resin and are formed as a unit separated from the case 4. Furthermore, a portion of the peripheral wall 71, which excludes the pair of guide walls 72, is formed as a unit separated from the pair of guide walls 72 and the bottom wall 70 and is formed by a resin having lower heat resistance than the heat resistant resin.

Description

  The present invention relates to an electrical connection box mounted on an automobile, and more particularly to an electrical connection box provided with a connector receiving portion into which a connector such as a wire harness is fitted.

  A variety of electronic devices are mounted on automobiles. In order to supply power and transmit signals to these various electronic devices, electrical junction boxes are arranged at appropriate locations in the automobile. In the present invention, a junction block (also referred to as a junction box), a fuse block (also referred to as a fuse box), and a relay block (also referred to as a relay box) are hereinafter collectively referred to as an electrical connection box.

  The electrical connection box has various structures depending on the vehicle type. For example, as in the electrical connection box 310 shown in FIG. 14, a case 304 including a box body 302 and a box body 303 assembled to each other, There is a structure having a board (not shown) housed in the case 304 and a connector receiving part 309 attached to an end of the board and exposed to the outside of the case 304 (see Patent Document 1). ).

  The connector receiving portion 309 is a portion into which a connector such as a wire harness is fitted. As shown in FIG. 15, a synthetic resin housing 305 and an L-shaped terminal 306 insert-molded in the housing 305. And is composed of. The housing 305 is integrally formed with a bottom wall 307 that holds the center portion of the terminal 306 and a peripheral wall 308 that stands in a cylindrical shape from the outer edge of the bottom wall 307 and surrounds one end 306 a of the terminal 306. Is provided. As shown in FIG. 16, one end portion 306 a of the terminal 306 disposed inside the peripheral wall 308 is electrically connected to the connector 10 that fits in a fashion and is inserted inside the peripheral wall 308. Also, the other end 306b of the terminal 306 disposed outside the peripheral wall 308 is electrically connected to the substrate by reflow soldering or flow soldering.

  In the connector receiving portion 309 of the electrical connection box 310, the peripheral wall 308 and the bottom wall 307 are integrally formed because the opening size accuracy of the peripheral wall 308 greatly affects the positioning accuracy of the connector 10. In addition, since the electrical connection box 310 has strict requirements on the alignment accuracy of the terminals 306, the terminals 306 and the housing 305 are formed as an integral structure.

JP 2009-153318 A

  The connector receiving portion 309 of the above-described conventional electrical connection box 310 has a structure in which the plurality of terminals 306 integrated with the housing 305 are electrically connected to the substrate by reflow soldering or flow soldering. As the resin material to be used, it is necessary to use an expensive heat-resistant resin that can withstand heat in a reflow furnace used at the time of reflow soldering or a solder bath used at the time of flow soldering, which increases the cost. It was.

  Accordingly, an object of the present invention is to provide an electrical junction box including a connector receiving portion that can reduce the amount of heat-resistant resin used and has high connector positioning accuracy.

  To achieve the above object, the invention described in claim 1 is composed of a case, a board accommodated in the case, a terminal and a housing electrically connected to the board by soldering, and a connector is fitted. In the electrical junction box comprising the connector receiving portion, the housing is formed in a plate shape, the terminal penetrates in the thickness direction, and projects from the bottom wall to hold the terminal A cylindrical peripheral wall surrounding the terminal, and is erected from the bottom wall and from both ends of the bottom wall, and is erected to a position farther from the bottom wall than the tip of the terminal. And a pair of guide walls constituting a part of the peripheral wall are integrally formed of a heat-resistant resin that does not melt during soldering and formed separately from the case, and the pair of guide walls of the peripheral wall Excluded part There is an electrical connection box, characterized in that it is formed by low heat resistance resin than the heat-resistant resin was formed with the pair of guide walls and said bottom wall and separate. The “soldering” in the present invention is defined as reflow or flow soldering.

  The invention described in claim 2 is the invention described in claim 1, wherein the case is configured by a pair of boxes that are assembled to each other, and a portion of the peripheral wall excluding the pair of guide walls is It is divided into two and is integrally formed in each of the pair of boxes.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the pair of guide walls includes a pair of first walls facing each other with a space therebetween, and the pair of guide walls. And a second wall that connects the first walls to each other, and the planar shape is formed in a U-shape.

  The invention described in claim 4 is the invention described in one of claims 1 to 3, wherein the pair of guide walls are provided with guide grooves or guide ribs for guiding the connector toward the bottom wall. It is characterized by being provided.

  According to the invention described in claim 1, the housing is formed in a plate shape, the terminal penetrates in the thickness direction thereof, the bottom wall holding the terminal, and the terminal protruding from the bottom wall. A cylindrical peripheral wall that surrounds the bottom wall, and is provided upright from both ends of the bottom wall and up to a position farther from the bottom wall than the tip of the terminal. And a pair of guide walls that are partly formed of a heat-resistant resin that does not melt during soldering and formed separately from the case, and a portion of the peripheral wall excluding the pair of guide walls Is formed separately from the pair of guide walls and the bottom wall and is formed of a resin having a lower heat resistance than the heat resistant resin, so that the connector is positioned with high accuracy by the pair of guide walls. You can Therefore, it is possible to provide an electrical junction box connector positioning accuracy it is possible to reduce the amount of heat-resistant resin with high connector receiving portion. In addition, since the connector can be positioned with high accuracy by the pair of guide walls, the opening size accuracy of the peripheral wall can be relaxed compared to the conventional product.

  According to the invention described in claim 2, the case is configured by a pair of boxes that are assembled to each other, and a portion of the peripheral wall excluding the pair of guide walls is divided into two and the pair of boxes. Since it is integrally formed with each body, the number of parts of the electrical junction box can be reduced.

  According to the invention described in claim 3, the pair of guide walls are a pair of first walls facing each other with a space therebetween, and a second of the pair of first walls connected to each other. Since the planar shape is formed in a U shape, the pair of guide walls causes the pair of guide walls to face each other and the pair of first walls face each other. The connector can be positioned in two directions. Therefore, the connector can be positioned with higher accuracy.

  According to the invention described in claim 4, since the guide grooves or guide ribs for guiding the connector toward the bottom wall are provided in the pair of guide walls, the connector is positioned with higher accuracy. In addition, the connector can be prevented from being squeezed with respect to the connector receiving portion.

It is a perspective view which shows the electrical junction box concerning the 1st Embodiment of this invention. FIG. 2 is an exploded view of the electrical junction box shown in FIG. 1. FIG. 2 is a plan view of the electric junction box shown in FIG. 1. It is sectional drawing along the AA line in FIG. It is explanatory drawing explaining a mode that a connector fits in the connector receptacle part of the electrical-connection box shown by FIG. It is a perspective view which shows the electrical-connection box concerning the 2nd Embodiment of this invention. It is a perspective view which shows the connector receptacle part of the electrical-connection box shown by FIG. It is a perspective view which shows a part of terminal and housing which comprise the connector receiving part shown by FIG. It is a perspective view which shows a part of housing which comprises the connector receiving part shown by FIG. It is a cross-sectional perspective view which shows the cross section along the BB line in FIG. It is sectional drawing of the connector receiving part shown by FIG. It is the perspective view which expanded the principal part of the connector receiving part shown by FIG. It is a top view of the principal part of the connector receiving part shown by FIG. It is a perspective view which shows the conventional electrical junction box. It is a perspective view which shows the connector receptacle part of the electrical-connection box shown by FIG. It is explanatory drawing explaining a mode that a connector fits in the connector receptacle part of the electrical-connection box shown by FIG.

(First embodiment)
An electrical junction box according to a first embodiment of the present invention will be described with reference to FIGS. The electrical junction box 1 of the present invention is mounted on an automobile and supplies power and transmits signals to an electronic device mounted on the automobile.

  As shown in FIGS. 1 to 3, the electrical connection box 1 includes a case 4 composed of a box 2 and a box 3 assembled together, a substrate 5 accommodated in the case 4, and a connector 10 of a wire harness. Are provided with four connector receiving portions 9 to be respectively fitted.

  The box 2 includes a main body wall 20 facing the substrate 5, a plurality of side walls 21 erected from the outer edge of the main body wall 20, and four second housings constituting each housing 7 of the four connector receiving portions 9. Member 73 is provided. The box 3 includes a plate-shaped main body wall 30 facing the substrate 5, a plurality of side walls 31 erected from the outer edge of the main body wall 30, and each housing 7 of four connector receiving portions 9. Four third members 74 are provided. The box 2 and the box 3 are assembled with each other so that the substrate 5 and the connector receiving portion 9 are positioned between the main body wall 20 and the main body wall 30. As shown in FIG. 4, the main body wall 30 is provided with a mounting groove 32 that accommodates the edge portion 70 a of the bottom wall 70 that constitutes the connector receiving portion 9.

  The substrate 5 is a printed board having a circuit pattern printed on the surface of an insulating plate. Various electronic components are mounted on the substrate 5 (illustration is omitted). The substrate 5 is provided with a through hole 51 to which the terminal 6 of the connector receiving portion 9 is electrically connected.

  The said wire harness is comprised with the some electric wire and the connector 10 (refer FIG. 5) attached to the terminal of these electric wires. The connector 10 includes a plurality of female terminals that are electrically connected to the ends of the electric wires, and a housing that houses the plurality of terminals.

  Two connector receiving portions 9 are arranged at both ends of the substrate 5 and are exposed to the outside of the main body walls 20 and 30. Each connector receiving portion 9 includes a plurality of L-shaped terminals 6 and a housing 7.

  As shown in FIG. 4, one end 6 a of each terminal 6 penetrates a bottom wall 70, which will be described later, of the housing 7 in the thickness direction and protrudes from one surface of the bottom wall 70. The one end 6a is inserted into a female terminal of the connector 10 and is electrically connected to the terminal. Further, the other end 6 b of each terminal 6 is electrically connected to the substrate 5 by reflow soldering using “lead-free solder” to be described later.

  The housing 7 is formed in a rectangular plate shape and holds the above-described plurality of terminals 6, and a rectangular cylindrical peripheral wall surrounding the ends 6 a of the plurality of terminals 6 protruding from the bottom wall 70. 71. The plurality of terminals 6 are held on the bottom wall 70 by insert molding or press-fitting. Further, as shown in FIG. 5, when the connector 10 of the wire harness is fitted into the connector receiving portion 9, the peripheral wall 71 receives the housing of the connector 10 inside thereof, so that the connector 10 becomes the terminal 6. Position with respect to.

  Further, as shown in FIG. 2, the housing 7 is configured by combining three members of a first member 8, a second member 73, and a third member 74 that are divided from each other. Yes.

  The first member 8 includes the above-described bottom wall 70 and a pair of guide walls 72 erected from both ends in the longitudinal direction of the bottom wall 70. The pair of guide walls 72 are erected from a pair of edges that form the short sides of the rectangular bottom wall 70, and constitute a part of the pair of opposed walls of the peripheral wall 71. Each guide wall 72 stands up to a position farther from the bottom wall 70 than the tip of one end 6 a of the terminal 6 protruding from the bottom wall 70. The first member 8 is integrally formed of “heat-resistant resin” described later that does not melt when the terminal 6 is soldered, and is formed separately from the case 4.

  In the present embodiment, the two first members 8 constituting the two connector receiving portions 9 are integrally molded in a state of being aligned along the longitudinal direction of the bottom wall 70.

  As shown in FIG. 2, the second member 73 includes a wall 73a and a pair of walls 73b erected from both ends in the longitudinal direction of the wall 73a. The wall 73a is provided along one edge that forms the long side of the rectangular bottom wall 70, and constitutes one of a pair of walls of the peripheral wall 71 facing each other. The pair of walls 73b are respectively disposed on the side of the pair of guide walls 72 away from the bottom wall 70, and together with the pair of guide walls 72 constitute part of the pair of walls of the peripheral wall 71 that face each other. ing. Such a second member 73 is integrally formed of “non-heat resistant resin” described later, which is lower in heat resistance than the heat resistant resin constituting the first member 8, and is integrally formed in the box 2. Yes.

  Moreover, in this embodiment, the two 2nd members 73 which comprise the two connector receiving parts 9 are integrally molded in the state located in a line along the longitudinal direction of the wall 73a. A single wall 73 b provided at the center of the two second members 73 forms both walls 73 b of the two second members 73.

  As shown in FIG. 2, the third member 74 includes a wall 74a and a pair of walls 74b provided upright from both ends in the longitudinal direction of the wall 74a. The wall 74 a is provided along one edge forming the long side of the rectangular bottom wall 70 and constitutes one of a pair of opposed walls of the peripheral wall 71. That is, the wall 74a is opposed to the above-described wall 73a. The pair of walls 74b are respectively disposed on the side of the pair of guide walls 72 away from the bottom wall 70, and together with the pair of guide walls 72 and the pair of walls 73b, the pair of opposite walls of the peripheral wall 71 are arranged. It is composed. Such a third member 74 is integrally formed of “non-heat-resistant resin”, which will be described later, which is lower in heat resistance than the heat-resistant resin constituting the first member 8 and is integrally formed in the box 3. Yes.

  Moreover, in this embodiment, the two 3rd members 74 which comprise the two connector receiving parts 9 are integrally molded in the state located in a line along the longitudinal direction of the wall 74a. A single wall 74 b provided at the center of the two third members 74 forms both walls 74 b of the two third members 74.

  As described above, in the connector receiving portion 9 of the present invention, the portion of the peripheral wall 71 excluding the pair of guide walls 72 is formed separately from the first member 8 and constitutes the first member 8. It is made of a non-heat resistant resin having a lower heat resistance than the heat resistant resin. And the part except a pair of guide wall 72 among the surrounding walls 71 is divided | segmented into the 2nd member 73 and the 3rd member 74, and is integrally molded by a pair of box bodies 2 and 3, respectively.

  Moreover, in the connector receiving part 9 of this invention, the 1st member 8 is formed with high precision, and as shown in FIG. 5, the space | interval M1 between a pair of guide walls 72 located in the back | inner side of the surrounding wall 71 However, it is formed narrower than the interval M2 between the pair of walls 74b located on the opening side of the peripheral wall 71. Although not shown in FIG. 5, the distance between the pair of walls 73b is substantially equal to the distance M2 between the pair of walls 74b. Therefore, the connector 10 fitted to the connector receiving portion 9 is positioned to some extent by being positioned between the pair of walls 73b and between the pair of walls 74b, and then between the pair of guide walls 72 on the back side of the peripheral wall 71. It is positioned with higher accuracy by being positioned on. And the connector 10 receives the one end part 6a of the terminal 6 in its own female terminal in the state positioned with high precision by the pair of guide walls 72. Further, since the pair of guide walls 72 are erected up to a position farther from the bottom wall 70 than the tip of the one end portion 6a of the terminal 6, the connector 10 is placed with high accuracy before the connector 10 hits the terminal 6. Can be positioned. As described above, in the present invention, the connector 10 can be positioned with high accuracy by the pair of guide walls 72. Therefore, the opening size accuracy of the peripheral wall 71, that is, the interval between the pair of walls 73b and the interval between the pair of walls 74b. Dimensional accuracy can be relaxed compared to conventional products.

  The “lead-free solder” is a solder that does not use lead, which is an environmentally hazardous substance. In the present embodiment, as the “lead-free solder”, lead composed of an alloy having a composition of “Ag (silver) 3.0 wt%, Cu (copper) 0.5 wt%, and remaining Sn (tin)”. Unused solder is used. The melting point of this solder is about 220 ° C.

  In addition, when reflow soldering the terminal 6 to the substrate 5, lead-free solder is applied or printed in advance around the through hole 51 of the substrate 5, and the other end of the terminal 6 held by the first member 8. The first member 8, the terminal 6, and the substrate 5 are put into a reflow furnace in a state where the part 6 b is passed through the through hole 51, and the lead-free solder melted by the heat of the reflow furnace is cured. The end 6b is electrically connected to the through hole 51 and the circuit pattern of the substrate 5.

  In the present invention, the terminal 6 may be electrically connected to the substrate 5 by “flow soldering using lead-free solder” in addition to the above-described “reflow soldering using lead-free solder”. When the terminal 6 is flow soldered to the substrate 5, the first member 8, the terminal 6, and the terminal 6 are held in a state where the other end 6 b of the terminal 6 held by the first member 8 is passed through the through hole 51. The substrate 5 is brought close to the solder bath, and the molten lead-free solder in the solder bath is attached to the back surface of the substrate 5 and the other end portion 6b of the terminal 6 protruding from the through hole 51 of the substrate 5 The other end portion 6b of the terminal 6 is electrically connected to the through hole 51 and the circuit pattern of the substrate 5 by curing the lead-free solder. That is, “soldering” in the present invention is defined as the above-described reflow method or flow method soldering in which the first member 8 is exposed to a high temperature.

  Thus, since the terminal 6 held by the first member 8 is electrically connected to the substrate 5 by reflow soldering or flow soldering using lead-free solder, the electrical junction box 1 of the present invention is The member 8 is formed of a heat-resistant resin that does not melt during reflow soldering or flow soldering between the terminal 6 and the substrate 5. That is, the first member 8 is formed of a heat-resistant resin that does not melt by the heat in the reflow furnace or solder bath described above.

  In addition, since the second member 73 and the third member 74 are assembled to the first member 8 after the terminal 6 held by the first member 8 is reflow soldered or flow soldered to the substrate 5, There is no need to use expensive heat-resistant resin. Therefore, in the present invention, in order to reduce the cost, the second member 73 and the third member 74, that is, the boxes 2 and 3, have lower heat resistance than the heat-resistant resin constituting the first member 8. It is made of an inexpensive non-heat resistant resin.

  That is, in the present invention, in order to reduce the cost by reducing the amount of heat-resistant resin used for the connector receiving portion 9, the housing 7 is constituted by three members divided from each other. Furthermore, in the present invention, in order to reduce the number of parts of the electrical junction box 1 and facilitate the assembly work, the second member 73 is integrally formed with the box body 2 and the third member 74 is attached to the box body 3. It is integrally molded.

  In addition, since the melting point of the lead-free solder used in this embodiment is about 220 ° C., the “heat-resistant resin” in this embodiment has a melting point higher than 220 ° C. Further, as a preferred heat-resistant resin for use in the present invention, SPS having a melting point of about 240 ° C. to 270 ° C. (for example, “XAREC S131 (melting point: about 270 ° C.)” manufactured by Idemitsu Kosan Co., Ltd.) ), PBT having a melting point of about 230 ° C., HPA having a melting point of about 330 ° C., PA / PPE having a melting point of about 260 ° C. (specific examples include “XYRON A0210 (melting point About 260 ° C.))), and the like.

  Further, the “non-heat resistant resin” in the present embodiment has a melting point lower than that of the “heat resistant resin”. Moreover, as a non-heat resistant resin preferable for use in the present invention, PPT, PPGT, PP, PP / PPE, etc. having a melting point of about 165 ° C. are exemplified.

  Next, the procedure for assembling the electrical junction box 1 described above will be described. First, the first member 8 to which the terminal 6 is attached is screwed to the substrate 5, and the terminal 6 and the substrate 5 are reflow soldered by the above-described procedure. Next, the first member 8 holding the terminal 6 and the substrate 5 are assembled to the box 3 so that the edge 70 a of the bottom wall 70 is positioned in the mounting groove 32 of the box 3. Finally, the box 2 is assembled to the box 3 to complete the assembly of the electrical junction box 1.

  As described above, according to the present invention, it is possible to provide the electrical junction box 1 including the connector receiving portion 9 that can reduce the amount of heat-resistant resin used and has high positioning accuracy of the connector 10.

  When the bottom wall 70 and the case 4 are separated, the bottom wall 70 is easily bent by a load applied to the bottom wall 70 when the connector 10 is fitted to and detached from the connector receiving portion 9, or the substrate 5 Although there is a concern that an external force is applied to the soldering portion between the terminal 6 and the terminal 6, in the electrical junction box 1 of the present invention, by positioning the edge 70a of the bottom wall 70 in the mounting groove 32 of the box 3, The amount of bending of the bottom wall 70 can be reduced, and external force can be prevented from being applied to the soldering portion. Therefore, it can prevent that the said soldering part produces a crack.

(Second Embodiment)
Subsequently, an electrical junction box according to a second embodiment of the present invention will be described with reference to FIGS. 6 to 13, the same components as those in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted. The electrical connection box 101 of the present invention is mounted on a vehicle and supplies power and transmits signals to an electronic device mounted on the vehicle.

  As shown in FIG. 6, the electrical connection box 101 includes a case 104, a board 5 accommodated in the case 104, and an ECU (Electronic Control Unit) 110 (shown by a one-dot chain line in FIG. 6). And a connector receiving portion 109 to be fitted. Further, an arrow X in FIG. 6 indicates the width direction of the case 104, an arrow Y in FIG. 6 indicates a longitudinal direction of the case 104, and an arrow Z in FIG. The direction is shown.

  The ECU 110 is formed in a box shape, and is attached to the case 104 so as to overlap the upper wall 104 a of the case 104. The connector of the ECU 110 includes a plurality of female terminals and a housing that accommodates the plurality of terminals.

  The connector receiving portion 109 protrudes from the upper wall 104a of the case 104 in the direction of arrow Z and is exposed to the outside. As shown in FIGS. 10 and 11, the connector receiving portion 109 includes a plurality of rod-like terminals 106 and a housing 107.

  As shown in FIGS. 10 and 11, one end 106 a of each terminal 106 penetrates a bottom wall 170 (to be described later) of the housing 107 in the thickness direction and protrudes from one surface of the bottom wall 170. The one end 106a is inserted into a female terminal of the connector of the ECU 110 and is electrically connected to the terminal. The other end 106b of each terminal 106 is electrically connected to the substrate 5 by reflow soldering using “lead-free solder” described in the first embodiment.

  As shown in FIGS. 7 to 9, the housing 107 is formed in a rectangular plate shape and holds the above-described plurality of terminals 106, and one end portion 106a of the plurality of terminals 106 protruding from the bottom wall 170. And a square cylindrical peripheral wall 171 that surrounds the periphery. The plurality of terminals 106 are held on the bottom wall 170 by insert molding or press-fitting. The peripheral wall 171 positions the connector with respect to the terminal 106 by receiving the connector housing inside the connector 110 of the ECU 110 when the connector of the ECU 110 is fitted to the connector receiving portion 109.

  Further, as shown in FIG. 10 and the like, the housing 107 is formed by combining a pair of walls 173 and 174 integrally formed with the upper wall 104a of the case 104 and another member 108 provided separately from the case 104. Has been configured.

  As shown in FIG. 8, the separate member 108 is attached to the substrate 5 through the bottom wall 170 described above, a pair of guide walls 172 erected from both ends in the longitudinal direction of the bottom wall 170, and screws. And a pair of screw mounting portions 175. The pair of guide walls 172 includes a pair of first walls 172a facing each other in the width direction of the bottom wall 170, and a second wall 172b connecting the pair of first walls 172a. The planar shape is formed in a U shape. In other words, the pair of first walls 172a are erected from a pair of edges forming the long side of the rectangular bottom wall 170, and constitute a part of the pair of opposed walls of the peripheral wall 171. Yes. In addition, the pair of second walls 172b of the pair of guide walls 172 are respectively erected from a pair of edges forming a short side of the rectangular bottom wall 170, and a pair of walls of the peripheral wall 171 facing each other. It is composed. Each guide wall 172 stands up to a position farther from the bottom wall 170 than the tip of the one end 106 a of the terminal 106 protruding from the bottom wall 170. Such another member 108 is integrally formed of the “heat resistant resin” described in the first embodiment.

  The pair of walls 173 and 174 are respectively erected in the direction of arrow Z from a pair of edges forming the long side of the rectangular through hole 140 formed in the upper wall 104 a of the case 104. The pair of walls 173 and 174 constitute a pair of opposed walls of the peripheral wall 171 together with the first wall 172a of the pair of guide walls 172 described above. The pair of walls 173 and 174, that is, the case 104, is formed of the “non-heat resistant resin” described in the first embodiment.

  Further, the pair of guide walls 172 passes through the inside of the through hole 140 described above and protrudes from the upper wall 104a of the case 104 in the arrow Z direction. Further, the ends of the pair of walls 173 and 174 described above are positioned farther from the upper wall 104 a than the ends of the pair of guide walls 172. Furthermore, as shown in FIG. 11, tapers 173 a and 174 a that guide the connector of the ECU 110 to the center in the width direction of the peripheral wall 171 are provided at the tips of the pair of walls 173 and 174.

  Further, the pair of guide walls 172 are provided with guide grooves 176 and guide ribs 177 that guide the connector of the ECU 110 straight to the bottom wall 170 side along the arrow Z direction and prevent the connector from receiving the connector receiving portion 109. It has been. The guide groove 176 is recessed from the inner surface of the first wall 172a and extends along the arrow Z direction. The guide groove 176 mainly prevents squeezing in the arrow X direction with respect to the connector receiving portion 109 of the connector. The guide rib 177 is formed to protrude from the inner surface of the second wall 172b and extends along the arrow Z direction. The guide rib 177 mainly prevents the connector receiving portion 109 of the connector from being twisted in the arrow Y direction. Further, the guide groove 176 and the guide rib 177 extend to a position farther from the bottom wall 170 than the tip of the one end 106 a of the terminal 106. Further, the connector of the ECU 110 is provided with a convex portion positioned inside the guide groove 176 and a concave portion positioning the guide rib 177 inside.

  The connector of the ECU 110 fitted to the connector receiving portion 109 is guided to the width direction center side (the center side in the arrow Y direction) of the peripheral wall 171 by the tapers 173a and 174a at the tips of the pair of walls 173 and 174. , Positioned between the pair of walls 173, 174. Then, by being positioned between the pair of guide walls 172, a direction in which the pair of guide walls 172 face each other (arrow X direction), and a direction in which the pair of first walls 172a face each other (arrow Y direction) Are positioned with high accuracy in the two directions. The connector receives the one end portion 106a of the terminal 106 in its own female terminal while being guided straight toward the bottom wall 170 along the arrow Z direction by the guide groove 176 and the guide rib 177. Further, since the pair of guide walls 172 are erected up to a position farther from the bottom wall 170 than the tip of the one end portion 106a of the terminal 106, the connector is positioned with high accuracy before the connector contacts the terminal 106. can do. Further, since the guide groove 176 and the guide rib 177 extend to a position farther from the bottom wall 170 than the tip of the one end portion 106a of the terminal 106, the terminal 106 is damaged by the twisting of the connector with respect to the connector receiving portion 109. It can be reliably prevented.

  As described above, according to the present invention, it is possible to provide the electrical junction box 101 including the connector receiving portion 109 that can reduce the amount of heat-resistant resin used and has high connector positioning accuracy.

  In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. That is, various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1,101 Electrical junction box 4,104 Case 5 Board | substrate 6,106 Terminal 7,107 Housing 9,109 Connector receiving part 10 Connector 70,170 Bottom wall 71,171 Perimeter wall 72,172 Guide wall

Claims (4)

In an electrical junction box comprising a case, a board accommodated in the case, a terminal and a housing electrically connected to the board by soldering, and a connector receiving portion into which a connector is fitted,
The housing is formed in a plate shape, and the terminal penetrates in the thickness direction, and includes a bottom wall that holds the terminal, and a cylindrical peripheral wall that surrounds the terminal protruding from the bottom wall. And
A pair of guide walls that stand up from both ends of the bottom wall and stand up to a position farther from the bottom wall than the tip of the terminal and constitute a part of the peripheral wall; It is integrally formed with a heat-resistant resin that does not melt during soldering and is formed separately from the case,
A portion of the peripheral wall excluding the pair of guide walls is formed separately from the pair of guide walls and the bottom wall and is formed of a resin having lower heat resistance than the heat resistant resin. Features an electrical junction box. The case is composed of a pair of boxes that are assembled together,
2. The electrical junction box according to claim 1, wherein a portion of the peripheral wall excluding the pair of guide walls is divided into two and is integrally formed with each of the pair of boxes. Each of the pair of guide walls includes a pair of first walls facing each other with a space therebetween, and a second wall connecting the pair of first walls, and the planar shape is a U-shape. The electrical junction box according to claim 1 or 2, wherein the electrical junction box is formed in a mold. 4. The electrical connection box according to claim 1, wherein a guide groove or a guide rib for guiding the connector toward the bottom wall is provided in the pair of guide walls. 5.

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