WO2009113631A1 - 電気接続箱 - Google Patents
電気接続箱 Download PDFInfo
- Publication number
- WO2009113631A1 WO2009113631A1 PCT/JP2009/054797 JP2009054797W WO2009113631A1 WO 2009113631 A1 WO2009113631 A1 WO 2009113631A1 JP 2009054797 W JP2009054797 W JP 2009054797W WO 2009113631 A1 WO2009113631 A1 WO 2009113631A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bottom wall
- bus bar
- synthetic resin
- junction box
- circuit
- Prior art date
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20845—Modifications to facilitate cooling, ventilating, or heating for automotive electronic casings
- H05K7/20854—Heat transfer by conduction from internal heat source to heat radiating structure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0238—Electrical distribution centers
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/02—Arrangements of circuit components or wiring on supporting structure
- H05K7/026—Multiple connections subassemblies
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R31/00—Coupling parts supported only by co-operation with counterpart
- H01R31/06—Intermediate parts for linking two coupling parts, e.g. adapter
- H01R31/065—Intermediate parts for linking two coupling parts, e.g. adapter with built-in electric apparatus
Definitions
- the present invention relates to an electrical junction box.
- This electrical junction box is formed by housing a circuit component in a casing.
- the circuit structure is formed by insert molding a plurality of bus bars arranged at intervals with a synthetic resin material.
- An electronic component is connected to an exposed portion of the bus bar exposed from the synthetic resin by soldering or the like.
- a through hole is formed in the synthetic resin portion at a position corresponding to between adjacent bus bars. This through hole is provided to cut a tie bar that connects adjacent bus bars.
- the present invention has been completed based on the above-described circumstances, and an object thereof is to provide an electrical junction box in which high temperature is suppressed locally.
- the present invention is an electrical junction box comprising a casing and a circuit structure housed in the casing, wherein the circuit structure body includes a plurality of bus bars arranged at intervals, and the plurality of adjacent bus bars.
- a synthetic resin material disposed between the bus bars and in close contact with the bus bar, and the thermal conductivity of the synthetic resin material is greater than that of air.
- the bus bar when the bus bar is energized, heat is generated from the bus bar.
- the heat generated from the bus bars is transmitted to a synthetic resin material that is disposed between the bus bars and is in close contact with the bus bars. Since the synthetic resin material has a higher thermal conductivity than air, it is possible to suppress heat from being accumulated in the bus bar. Thereby, it can suppress that an electrical junction box becomes high temperature locally.
- FIG. 1 is a perspective view of an electrical junction box according to Embodiment 1 of the present invention as viewed from the front side.
- FIG. 2 is a front view of the electrical junction box.
- FIG. 3 is a perspective view of the electrical junction box as seen from the back side.
- FIG. 4 is a rear view of the electrical junction box.
- FIG. 5 is an exploded perspective view of the electrical junction box as seen from the front side.
- FIG. 6 is an exploded perspective view of the electrical junction box as seen from the back side.
- FIG. 9 is a perspective view showing a circuit structure.
- FIG. 10 is a perspective view showing a connecting bus bar.
- FIG. 10 is a perspective view showing a connecting bus bar.
- FIG. 11 is a perspective view showing a state in which a synthetic resin material is insert-molded into the connecting bus bar.
- FIG. 12 is a front view showing a state in which a tie bar of a connection bus bar formed by insert molding is cut.
- FIG. 13 is the perspective view which looked at the electrical junction box concerning Embodiment 2 of this invention from the front side.
- FIG. 14 is a front view of the electrical junction box.
- FIG. 15 is a perspective view of the electrical junction box as seen from the back side.
- FIG. 16 is a rear view of the electrical junction box.
- FIG. 17 is an exploded perspective view of the electrical junction box as seen from the front side.
- 18 is a cross-sectional view taken along line CC in FIG. 19 is a cross-sectional view taken along the line DD in FIG.
- FIG. 20 is a perspective view of both circuit components.
- FIG. 21 is a perspective view showing a state in which a tie bar of a connection bus bar formed by insert molding is cut.
- FIG. 22 is a front view showing a state in which a tie bar of a connection bus bar formed by insert molding is cut.
- FIG. 23 is a front view showing a circuit structure according to Embodiment 3 of the present invention. 24 is a cross-sectional view taken along line EE in FIG.
- the electrical junction box 10 is configured by housing a circuit structure 12 in which a circuit is formed in a synthetic resin casing 11.
- the electrical junction box 10 is connected between a power source (not shown) such as a battery and on-vehicle electrical components (not shown) such as a headlamp and a wiper, and is used to energize and cut off various on-vehicle electrical components.
- a power source not shown
- on-vehicle electrical components not shown
- the upper side in FIG. 2 is the upper side and the lower side is the lower side. Further, the right side in FIG. 2 is the right side, and the left is the left side. In addition, the front side in the penetration direction of the paper surface in FIG.
- the casing 11 includes a lower case 13 positioned on the lower side in FIG. 2 and an upper case 14 assembled to the upper portion of the lower case 13.
- the lower case 13 is made of synthetic resin and opens upward.
- a connector housing 15 that opens downward is formed on the lower surface of the lower wall of the lower case 13.
- the connector housing 15 can be fitted with a mating connector (not shown).
- the mating connector is connected to a battery, in-vehicle electrical components, etc. via a wire harness (not shown).
- the circuit structure 12 is accommodated in the opening of the lower case 13 from above.
- an upper case 14 is assembled from above.
- the upper case 14 is made of a synthetic resin and opens downward.
- a fuse mounting portion 17 in which a fuse 16 can be mounted is opened in the upper wall of the upper case 14.
- a plurality of fuses 16 (four in this embodiment) are mounted in the fuse mounting portion 17 (see FIGS. 5 and 6).
- a lock portion 19A protruding outward is formed on the outer surface of the front wall 18A located on the front side of the lower case 13.
- a lock receiving portion 20A that can be elastically deformed is formed at a position corresponding to the lock portion 19A.
- lock portions 19 ⁇ / b> B projecting outward are formed on the outer surfaces of the side walls located on the left and right sides of the lower case 13.
- lock receiving portions 20B that can be elastically deformed are formed at positions corresponding to the lock portions 19B.
- the lower case 13 and the upper case 14 are assembled by elastically fitting the lock portions 19A and 19B and the lock receiving portions 20A and 20B (see FIG. 8).
- circuit structure 12 As shown in FIGS. 7 to 9, the circuit structure 12 includes a plurality of first bus bars 21 (corresponding to bus bars) arranged at intervals, and a synthetic resin material filled between the first bus bars 21. 22.
- the first bus bar 21 is formed by connecting a plurality of first bus bars 21 to each other by a tie bar 28 by pressing a metal plate material (see FIG. 10), and then cutting the tie bar 28. It is formed. As shown in FIG. 7, the upper end portion of the first bus bar 21 is bent at a right angle twice on the front side and formed in a crank shape. The upper end portion of the first bus bar 21 is inserted into the above-described fuse mounting portion 17 and serves as a fuse side terminal 24 ⁇ / b> A connected to the fuse 16. The lower end portion of the first bus bar 21 is also bent at right angles twice on the front side and formed in a crank shape. A lower end portion of the first bus bar 21 penetrates the lower wall of the lower case 13 and is inserted into the connector housing 15 described above to serve as a connector side terminal 25 connected to the mating connector.
- a synthetic resin material 22 having a thermal conductivity higher than that of air is insert-molded in a region between the fuse-side terminal 24A and the connector-side terminal 25 in the first bus bar 21.
- the synthetic resin material 22 is filled between the adjacent first bus bars 21 and is in close contact with each first bus bar 21.
- the circuit structure 12 has a bottom wall 26 formed of a synthetic resin material 22.
- the bottom wall 26 is disposed perpendicular to the lower wall of the lower case 13.
- the bottom wall 26 has a substantially rectangular shape when viewed from the front side.
- Four side walls 27 are formed on the outer peripheral edge of the bottom wall 26 so as to stand on the front side.
- fuse-side terminals 24 ⁇ / b> A protrude upward from the front edge of the side wall 27 located on the upper side.
- the upper end portion of the fuse side terminal 24 ⁇ / b> A is divided into two forks so that the terminal of the fuse 16 can be clamped.
- the connector-side terminal 25 projects downward from the front edge of the side wall 27 located on the lower side of the side wall 27.
- a tie bar 28 that connects the first bus bars 21 is cut at a position closer to the upper end or the lower end than the region covered with the synthetic resin material 22 in the first bus bar 21.
- a cutting portion 29 is formed. Specifically, a cut portion 29 is formed on the side edges of the fuse side terminal 24 ⁇ / b> A and the connector side terminal 25.
- tie bars 28 that connect the first bus bars 21 protrude outward from the front side edges of the side walls 27 located on the upper side and the side walls 27 located on the lower side. Yes.
- the tip of the tie bar 28 is cut to form a cutting part 29.
- an exposed portion 30 in which the first bus bar 21 is exposed from the synthetic resin material 22 is formed on the surface (front surface) of the bottom wall 26 on which the side wall 27 is erected. Yes.
- a lead terminal 32 of a relay 31 (corresponding to an electronic component) is connected to the exposed portion 30 by, for example, soldering.
- four relays 31 are connected to the circuit configuration body 12 (see FIG. 9).
- a positioning projection 33 for positioning the relay 31 is formed on the surface of the bottom wall 26 so as to protrude to the front side. The contact of the surface of the relay 31 with the positioning protrusion 33 allows the relay 31 to be positioned at the normal position.
- a region surrounded by the bottom wall 26 and the four side walls 27 is filled with a filler 34 made of, for example, a synthetic resin.
- the filler 34 covers the exposed portion 30 and is in contact with the relay 31. In FIG. 7, the filler 34 is omitted.
- the surface of the bottom wall 26 opposite to the side on which the relay 31 is mounted (the back surface, the right side in FIG. 7) is filled between adjacent first bus bars 21.
- a soaking layer 35 that is continuous with the resin material 22 and covers the back surface of the first bus bar 21 and absorbs and dissipates heat generated from the first bus bar 21 when energized is formed.
- a lock portion 19C protruding outward is formed on the back surface side of the bottom wall 26 of the circuit structure 12 (the back surface of the soaking layer 35).
- an elastically deformable lock receiving portion 20 ⁇ / b> C is formed on the outer surface on the back side of the upper case 14 at a position corresponding to the lock portion 19 ⁇ / b> C.
- the circuit component 12 and the upper case 14 are assembled by elastically fitting the lock portion 19C and the lock receiving portion 20C.
- an opening 36 is formed on the back side of the lower case 13 and the upper case 14 in a state where the lower case 13, the circuit structure 12, and the upper case 14 are assembled.
- the circuit component 12 is accommodated in the casing 11 in such a posture that the opening 36 is closed by the heat equalizing layer 35 of the bottom wall 26 of the circuit component 12. That is, the bottom wall 26 of the circuit component 12 constitutes a part of the outer surface of the casing 11.
- (Second bus bar 38) As shown in FIGS. 6 and 7, on the back surface of the front wall 18 ⁇ / b> A of the lower case 13, a holding portion 37 that holds the second bus bar 38 is formed to open upward.
- a second bus bar 38 is disposed in the casing 11 so as to overlap the back side of the front wall 18A of the lower case 13.
- the second bus bar 38 is formed by pressing a metal plate material. From the upper end edge of the second bus bar 38, a plurality (four in this embodiment) of fuse-side terminals 24 ⁇ / b> B that are inserted into the fuse mounting portion 17 and connected to the fuse 16 protrude upward. As shown in FIGS.
- the upper end portion of the fuse-side terminal 24 ⁇ / b> B is divided into two portions and is formed so as to be able to hold the terminal of the fuse 16.
- the power supply side terminal 39 protruding downward (left front side in FIG. 6) from the position near the center of the lower end edge of the second bus bar 38 in the left-right direction (direction from the right front side to the left rear side in FIG. 6). Is formed.
- the power supply side terminal 39 is formed in a crank shape by being bent at a right angle twice to the back side (right side in FIG. 8).
- the power supply side terminal 39 passes through the lower wall of the lower case 13 and is inserted into the connector housing 15 to be connected to the mating connector connected to the battery via the wire harness.
- connection bus bar 23 in a form in which the plurality of first bus bars 21 are connected by the tie bars 28 is formed inside the substantially rectangular frame 41.
- the connecting bus bar 23 formed in the above form is placed in a mold (not shown), and insert molding is performed with the synthetic resin material 22. As shown in FIG. 11, the bottom wall 26 and the side wall 27 are formed by this process.
- the tie bar 28 that connects the adjacent first bus bars 21 is cut. Thereby, the cutting part 29 is formed in the first bus bar 21. A cut portion 29 is formed in the tie bar 28 protruding from the synthetic resin material 22.
- the relay 31 is placed in the normal position while the relay 31 is in contact with the positioning protrusion 33 of the bottom wall 26. Thereafter, the lead terminal 32 of the relay 31 and the first bus bar 21 exposed from the exposed portion 30 are soldered by a known method such as laser soldering or reflow soldering.
- the circuit component 12 is placed with the bottom wall 26 facing down and the side wall 27 rising upward. Thereafter, a liquid filler 34 is filled in a region surrounded by the bottom wall 26 and the side wall 27. Filler 34 fills up to the liquid level that covers exposed portion 30 and contacts relay 31. Thereafter, the filler 34 is solidified (see FIG. 9).
- the second bus bar 38 is inserted into the holding portion 37 of the lower case 13 and the power supply side terminal 39 of the second bus bar 38 is inserted into the connector housing 15 from above.
- the connector side terminal 25 of the circuit component 12 is inserted into the connector housing 15 from above.
- the upper case 14 is assembled from above the lower case 13 and the circuit component 12.
- the fuse side terminals 24 ⁇ / b> A and 24 ⁇ / b> B of the first bus bar 21 and the second bus bar 38 are accommodated in the fuse mounting portion 17 of the upper case 14.
- the lock receiving portions 20A, 20B, 20C of the upper case 14 come into contact with the lower case 13 and the lock portions 19A, 19B, 19C of the circuit component 12 from above.
- the lock receiving portions 20A, 20B, and 20C are elastically deformed outward, and thereafter are restored and deformed to be elastically engaged with the lock portions 19A, 19B, and 19C.
- the upper case 14 is assembled
- the electrical junction box 10 is completed.
- the electrical junction box 10 is mounted on the vehicle in a posture in which the bottom wall 26 of the circuit component 12 is vertical.
- the heat generated from the first bus bar 21 by energizing the first bus bar 21 is transmitted to the filler 34 that covers the exposed portion 30. Further, the heat generated from the relay 31 by energizing the relay 31 is transmitted to the filler 34 that contacts the relay 31. Thereby, it is possible to suppress heat from being accumulated in the first bus bar 21 and the relay 31.
- the heat generated from the first bus bar 21 is transmitted to the synthetic resin material 22, then conducted to the soaking layer 35 formed continuously with the synthetic resin material 22, and dispersed by the soaking layer 35. Thereby, it can suppress further that the vicinity of the 1st bus-bar 21 becomes high temperature locally.
- the heat transferred to the soaking layer 35 is dissipated outside the casing 11 from the outer surface of the soaking layer 35 exposed at the opening 36 formed in the casing 11.
- the circuit component 12 is formed by press-molding a metal plate material, thereby forming the connection bus bar 23 in which the plurality of first bus bars 21 are connected by the tie bars 28, and the connection bus bar 23 is inserted.
- a metal plate material By molding, it can be manufactured by filling the synthetic resin material 22 between the adjacent first bus bars 21 and then cutting the tie bars 28.
- the first bus bar 21 connected by the tie bar 28 can be insert-molded.
- the manufacturing process can be simplified.
- FIG. 14 is the upper side
- the lower side is the lower side
- the right side in FIG. 14 is the right side
- the left is the left side.
- the front side in the penetration direction of the paper surface in FIG. 14 is the front side in the penetration direction of the paper surface in FIG. 14
- the electrical junction box 50 includes a front side circuit configuration body 52 ⁇ / b> A (corresponding to a circuit configuration body) disposed on the front side (left side in FIG. 18) in the casing 51. And a back side circuit structure 52B (corresponding to a circuit structure) disposed on the back side (right side in FIG. 18).
- the lower case 53 is made of synthetic resin and opens upward.
- the upper surface of the lower wall of the lower case 53 protrudes upward from the vicinity of the center in the front and back direction (left and right direction in FIG. 18) and extends in the left and right direction (direction passing through the paper surface in FIG. 18).
- a clamping part 77 for clamping the bus bar 78 is formed (see FIG. 17).
- the regions partitioned in the front and back direction (left and right direction in FIG. 18) by the sandwiching portion 77 are respectively arranged from the upper side to the front side circuit configuration body 52A and the back side circuit configuration.
- the body 52B is accommodated.
- An upper case 54 is assembled above the lower case 53, the front circuit configuration body 52A, and the back circuit configuration body 52B from above.
- the upper case 54 is made of a synthetic resin and opens downward.
- a fuse mounting portion 17 in which the fuse 16 can be mounted is opened in the upper wall of the upper case 54.
- a plurality of fuses 16 (10 in this embodiment) are mounted in the fuse mounting portion 17 (see FIG. 17).
- lock portions 59B projecting outward are formed on the outer surfaces of the side walls located on the left and right sides of the lower case 53 (the direction from the right front side to the left rear side in FIG. 17).
- lock receiving portions 60B that can be elastically deformed are formed at positions corresponding to the lock portions 59B.
- the lower case 53 and the upper case 54 are assembled by elastically fitting the lock portion 59B and the lock receiving portion 60B (see FIGS. 13 and 15).
- both circuit components 52 ⁇ / b> A and 52 ⁇ / b> B include a plurality of first bus bars 61 arranged at intervals and a synthetic resin material 62 filled between the first bus bars 61. Including.
- the front side circuit configuration body 52A and the back side circuit configuration body 52B have the same shape.
- a synthetic resin material 62 having a thermal conductivity higher than that of air is insert-molded in a region between the fuse-side terminal 64 ⁇ / b> A and the connector-side terminal 65 in the first bus bar 61.
- the synthetic resin material 62 is filled between adjacent first bus bars 61 and is in close contact with each first bus bar 61.
- the upper end of the first bus bar 61 is bent at a right angle twice on the front side and formed in a crank shape.
- the upper end portion of the first bus bar 61 is inserted into the fuse mounting portion 17 and serves as a fuse side terminal 64 ⁇ / b> A connected to the fuse 16.
- the lower end portion of the first bus bar 21 is also bent at right angles twice on the front side and formed in a crank shape.
- the lower end portion of the first bus bar 61 penetrates the lower wall of the lower case 53 and is inserted into the connector housing 15 to serve as a connector side terminal 65 connected to the mating connector.
- the bottom wall 66 is formed by the synthetic resin material 62 in both the circuit components 52 ⁇ / b> A and 52 ⁇ / b> B.
- the bottom wall 66 is arranged perpendicular to the lower wall of the lower case 53.
- the bottom wall 66 has a substantially rectangular shape when viewed from the front side.
- Four side walls 67 are formed on the outer peripheral edge of the bottom wall 66 so as to stand on the front side.
- fuse-side terminals 64A protrude upward from the front edge of the side wall 67 located on the upper side. As shown in FIG.
- the upper end portion of the fuse side terminal 64 ⁇ / b> A is divided into two portions, and is formed so that the terminal of the fuse 16 can be clamped. Further, the connector-side terminal 65 projects downward from the front edge of the side wall 67 located on the lower side of the side wall 67.
- an exposed portion 30 where the first bus bar 61 is exposed from the synthetic resin material 62 is formed on the surface of the bottom wall 66 on the side where the side wall 67 is erected.
- a lead terminal 32 of a relay 31 is connected to the exposed portion 30 by, for example, soldering.
- five relays 31 are connected to both circuit components 52A and 52B.
- a region surrounded by the bottom wall 66 and the four side walls 67 is filled with a filler 34 made of, for example, a synthetic resin.
- the filler 34 covers the exposed portion 30 and is in contact with the relay 31. In FIG. 18, the filler 34 is omitted.
- the surface (surface) opposite to the side on which the relay 31 is mounted on the bottom wall 66 of the front side circuit structure 52 ⁇ / b> A is filled between the adjacent first bus bars 61.
- a soaking layer 35 that is continuous with the synthetic resin material 62 and covers the back surface of the first bus bar 61 and absorbs and disperses heat generated from the first bus bar 61 when energized is formed.
- the synthetic resin material 62 filled between the adjacent first bus bars 61 and A soaking layer 35 is formed which is continuous and covers the back surface of the first bus bar 61 and absorbs and dissipates heat generated from the first bus bar 61 when energized.
- a lock portion 59A that protrudes to the front side is formed on the surface side of the bottom wall 66 of the front side circuit configuration body 52A (the surface of the soaking layer 35).
- an elastically deformable lock receiving portion 60 ⁇ / b> A is formed on the front outer surface of the upper case 54 at a position corresponding to the lock portion 59 ⁇ / b> A.
- a lock portion 59C protruding to the back side is formed on the back side of the bottom wall 66 of the back side circuit structure 52B (the back side of the heat equalizing layer 35).
- an elastically deformable lock receiving portion 60 ⁇ / b> C is formed on the outer surface on the back side of the upper case 54 at a position corresponding to the lock portion 59 ⁇ / b> C.
- the circuit component 12 and the upper case 54 are assembled by elastically fitting the lock portions 59A, 59B, 59C and the lock receiving portions 60A, 60B, 60C.
- both circuit components 52A and 52B are accommodated in regions of the casing 51 that are partitioned in the front-back direction (left-right direction in FIG. 18) by the sandwiching portions 77 of the lower case 53. Both the circuit components 52A and 52B are arranged in the casing 51 in a posture in which the relay 31 faces the clamping portion 77 side.
- the lower case 53, the two circuit components 52 ⁇ / b> A and 52 ⁇ / b> B, and the upper case 54 are assembled to the front side and the back side of the lower case 53 and the upper case 54.
- the opening 36 is formed.
- the two circuit components 52A and 52B are accommodated in the casing 51 in such a posture that both the openings 36 are closed by the heat equalizing layer 35 of the bottom walls 66 of the circuit components 52A and 52B. That is, the bottom walls 66 of both circuit components 52 ⁇ / b> A and 52 ⁇ / b> B constitute a part of the outer surface of the casing 51.
- the second bus bar 78 is sandwiched from the front and back direction (left and right direction in FIG. 18) by the sandwiching portion 77 formed in the lower case 53.
- the second bus bar 78 is formed by pressing a metal plate material. From the upper end edge of the second bus bar 78, a plurality (ten in this embodiment) of fuse side terminals 64B inserted into the fuse mounting portion 17 and connected to the fuse 16 protrude upward. Further, a power supply side terminal 79 protruding downward is formed at a position near the right end (on the right front side in FIG. 17) of the lower end edge of the second bus bar 78.
- the power supply side terminal 79 is inserted into the connector housing 15 through the lower wall of the lower case 53, and is connected to the mating connector connected to the battery via the wire harness.
- the connecting bus bar 23 is formed by connecting the plurality of first bus bars 61 to each other by the tie bars 28 inside the frame 41 having a substantially rectangular shape.
- the connecting bus bar 23 formed in the above form is placed in a mold (not shown), and insert molding is performed with the synthetic resin material 62. By this step, the bottom wall 66 and the side wall 67 are formed.
- the tie bars 28 that connect the adjacent first bus bars 61 are cut. Thereby, the cutting part 29 is formed in the first bus bar 61. Further, a cut portion 29 is formed in the tie bar 28 protruding from the synthetic resin material 62.
- the relay 31 is placed in the normal position while the relay 31 is in contact with the positioning protrusion 33 of the bottom wall 66. Thereafter, the lead terminal 32 of the relay 31 and the first bus bar 61 exposed from the exposed portion 30 are soldered by a known method such as laser soldering or reflow soldering.
- the circuit component 12 is placed with the bottom wall 66 facing down and the side wall 67 rising upward. Thereafter, the liquid filler 34 is filled into a region surrounded by the bottom wall 66 and the side wall 67. Filler 34 fills up to the liquid level that covers exposed portion 30 and contacts relay 31. Thereafter, the filler 34 is solidified (see FIG. 20).
- the second bus bar 78 is inserted into the holding part 77 of the lower case 53, and the power supply side terminal 79 of the second bus bar 78 is inserted into the connector housing 15 from above.
- the connector side terminals 65 of the front side circuit structure 52A and the back side circuit structure 52B are inserted into the connector housing 15 from above.
- the upper case 54 is assembled from above the lower case 53 and the two circuit components 52A and 52B.
- the fuse side terminals 64 ⁇ / b> A and 64 ⁇ / b> B of the first bus bar 61 and the second bus bar 78 are accommodated in the fuse mounting portion 17 of the upper case 54.
- the lock receiving portions 60A, 60B, 60C of the upper case 54 come into contact with the lower case 53 and the lock portions 59A, 59B, 59C of the two circuit components 52A, 52B from above.
- the lock receiving portions 60A, 60B, and 60C are elastically deformed outward, and thereafter are restored and deformed to be elastically engaged with the lock portions 59A, 59B, and 59C.
- the upper case 54 is assembled
- the electrical junction box 50 is completed.
- the electrical junction box 50 is mounted on the vehicle in a posture in which the bottom wall 66 of the circuit component 12 is vertical.
- the mounting density can be improved.
- FIG. 23 is the upper side
- the lower side is the lower side.
- the right side in FIG. 23 is the right side
- the left is the left side.
- the upper side in FIG. 24 is the front side
- the lower side is the back side.
- the circuit structure 80 As shown in FIG. 23, the circuit structure 80 according to the present embodiment has a substantially rectangular shape elongated in the left-right direction when viewed from the front side (the front side in the direction of passing through the paper in FIG. 23).
- the circuit structure 80 is provided with a plurality of first bus bars 81 arranged at intervals so as to protrude upward from the upper edge of the circuit structure 80 and protrude downward from the lower edge of the circuit structure 80. ing.
- a synthetic resin material 82 having a thermal conductivity larger than that of air is disposed between the adjacent first bus bars 81.
- the synthetic resin material 82 forms a side wall 83 and a bottom wall 84.
- the circuit structure 80 includes a circuit board 85.
- the circuit board 85 has a substantially rectangular shape.
- a conductive path (not shown) is formed on the surface of the circuit board 85 (upper surface in FIG. 24, corresponding to one surface of the circuit board 85) by a printed wiring technique.
- An electronic component 86 is mounted on the surface of the circuit board 85 and is electrically connected to the conductive path.
- a through hole 87 is formed in the circuit board 85.
- One end of the first bus bar 81 is inserted into the through hole 87 and soldered.
- the first bus bar 81 and the circuit board 85 are electrically connected.
- the first bus bar 81 is bent on the front side of the circuit board 85. Thereby, the other end of the first bus bar 81 extends in a direction along the plate surface of the circuit board 85.
- the circuit board 85 and the first bus bar 81 are molded by a synthetic resin material 82. Thereby, the side wall 83 and the bottom wall 84 described above are formed. As shown in FIG. 24, the first bus bar 81 passes through the side wall 83. Further, the surface of the circuit board 85 is exposed from the bottom wall 84.
- a region surrounded by the bottom wall 84 and the side wall 83 in the circuit structure 80 is filled with a filler 88 that covers the surface of the circuit board 85 and contacts the electronic component 86.
- the filler 88 is liquid at the time of filling and is solidified after filling. In the present embodiment, part or all of the electronic component 86 is embedded in the filler 88.
- the bottom wall 84 of the circuit structure 80 is made of a synthetic resin that covers the back surface of the circuit board 85 (the lower surface in FIG. 24 and corresponds to the other surface of the circuit board 85) and dissipates heat generated in the circuit board 85.
- a soaking layer 89 is formed.
- the soaking layer 89 is formed by molding.
- the soaking layer 89 covers the back surface of the circuit board 85 and also covers one end portion of the first bus bar 81 inserted through the circuit board 85. As a result, the first bus bar 81 is insulated.
- the circuit board 85 is formed with a resin filling hole 90 filled with a synthetic resin for forming the soaking layer 89 so as to penetrate the circuit board 85.
- the synthetic resin forming the soaking layer 89 is in close contact with the inner wall surface of the resin filling hole 90.
- the soaking layer 89 is exposed to the outside of the casing 11 from the opening 36 of the casing 11.
- a through hole 87 is formed in the circuit board 85, and then a conductive path is formed by a printed wiring technique. Subsequently, one end of the first bus bar 81 is inserted into the through hole 87 and soldered.
- the circuit board 85 to which the first bus bar 81 is soldered is placed in a mold (not shown) and molded with the synthetic resin material 82. Thereby, the bottom wall 84, the side wall 83, and the soaking layer 89 are formed.
- the electronic component 86 is mounted on the surface of the circuit board 85 by a known method such as reflow soldering.
- the circuit board 85 is molded by the synthetic resin material 82. Thereby, the bottom wall 84, the side wall 83, and the soaking layer 89 are formed. At this time, the soaking layer 89 has an opening (not shown) through which a soldered portion between the first bus bar 81 and the circuit board 85 is exposed at a position corresponding to a portion where the first bus bar 81 is soldered to the circuit board 85. )).
- the electronic component 86 is mounted on the surface of the circuit board 85 by a known method such as reflow soldering. Subsequently, the first bus bar 81 is soldered.
- the filler 88 is solidified. Thereafter, the filler 88 is filled into the opening provided in the soaking layer 89 and solidified. Note that the order of filling the filler 88 may be either the region surrounded by the bottom wall 84 and the side wall 83 or the opening provided in the soaking layer 89. Thereby, the circuit structure 80 is completed.
- the circuit structure 80 since the circuit structure 80 includes the circuit board 85, the wiring density can be improved as compared with the case where the circuit is formed by only the first bus bar 81.
- the resin filling hole 90 is filled with the synthetic resin material 82 forming the soaking layer 89 in close contact with the inner wall surface of the resin filling hole 90.
- the heat generated in the circuit board 85 when energized is transferred to the soaking layer 89 covering the back surface of the circuit board 85 and then dispersed by the soaking layer 89.
- the heat transferred to the soaking layer 89 is efficiently dissipated to the outside of the casing 11 from the soaking layer 89 exposed from the opening 36 of the casing 11. As a result, the heat dissipation of the electrical junction box 10 can be improved.
- the present invention is not limited to the embodiments described with reference to the above description and drawings.
- the following embodiments are also included in the technical scope of the present invention.
- the circuit components 12, 52A, 52B are formed by forming the connecting bus bar 23 by insert molding.
- the present invention is not limited to this, and a plurality of first bus bars cut in advance. 21 may be disposed at a predetermined position in the mold, and then insert-molded.
- the circuit components 12, 52 ⁇ / b> A, and 52 ⁇ / b> B are configured to be filled with the filler 34.
- the first bus bars 21 and 61 or relays are formed by the synthetic resin material 22.
- the filler 34 can be omitted.
- the circuit structure bodies 12, 52 ⁇ / b> A, and 52 ⁇ / b> B are configured to have the soaking layer 35, but the present invention is not limited thereto. If the heat generated from the bus bars 21 and 61 or the relay 31 can be efficiently dissipated, the soaking layer 35 can be omitted. In this case, the first bus bars 21 and 61 are exposed on the back surface of the bottom wall 26 of the circuit structure 12. Then, there is a concern that water or dust adheres to the first bus bars 21 and 61 exposed on the back surface of the bottom wall 26 and short-circuits.
- the opening portions 36 are not provided in the casings 11 and 51, and the circuit components 12, 52 ⁇ / b> A and 52 ⁇ / b> B are covered with the casings 11 and 51, thereby exposing the back surface of the bottom wall 26. 1 It is possible to prevent water and dust from adhering to the bus bars 21 and 61.
- the relay 31 is used as the electronic component. However, the present invention is not limited to this, and a semiconductor relay may be used. Moreover, a resistor, a capacitor, or the like may be used.
- the circuit structure 80 is configured to have the soaking layer 89.
- the present invention is not limited to this, and the soaking layer 89 may be omitted.
- the heat equalizing layer 89 is omitted, there is a concern that water or dust adheres to the circuit board 85 exposed on the back surface of the bottom wall 84 and short-circuits. Therefore, in this case, water or dust adheres to the circuit board 85 exposed on the back surface of the bottom wall 84 by providing a configuration in which the opening is not provided in the casing and the circuit structure 80 is covered with the casing. Can be suppressed.
- the circuit formed by the bus bar may be formed by a thick copper circuit.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
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- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
Description
11,51...ケーシング
12,80...回路構成体
13,53...ロアケース(ケーシング11,51)
14,54...アッパーケース(ケーシング11,51)
21,61,81...第1バスバー
22,62,82...合成樹脂材
26,66,84...底壁
27,67,83...側壁
28...タイバー
29...切断部
30...露出部
31...リレー(電子部品)
34,88...充填材
35,89...均熱層
36...開口部
52A...表側回路構成体(回路構成体)
52B...裏側回路構成体(回路構成体)
85...回路基板
86...電子部品
本発明を車両用の電気接続箱10に適用した実施形態1について図1ないし図12を参照して説明する。本実施形態に係る電気接続箱10は、合成樹脂製のケーシング11内に、回路が形成された回路構成体12を収容してなる。この電気接続箱10は、バッテリー等の電源(図示せず)と、ヘッドランプ、ワイパー等の車載電装品(図示せず)との間に接続されて、各種車載電装品の通電及び断電を行う。
ケーシング11は、図2における下側に位置するロアケース13と、ロアケース13の上部に組み付けられるアッパーケース14とを備える。
図7ないし図9に示すように、回路構成体12は、間隔を空けて並べた複数の第1バスバー21(バスバーに相当する)と、この第1バスバー21の間に充填された合成樹脂材22とを含む。
図6及び図7に示すように、ロアケース13の表壁18Aの裏面には、第2バスバー38を挟持する挟持部37が、上方に開口して形成されている。ケーシング11内には、ロアケース13の表壁18Aの裏側に重なるようにして、第2バスバー38が配設されている。第2バスバー38は金属板材をプレス加工することで形成される。第2バスバー38の上端縁からは、ヒューズ装着部17内に挿入されてヒューズ16と接続される複数(本実施形態では4つ)のヒューズ側端子24Bが上方に突出している。図5及び図6に示すように、ヒューズ側端子24Bの上端部は2股に分かれて形成されており、ヒューズ16の端子を挟持可能に形成されている。また、第2バスバー38の下端縁のうち、左右方向(図6における右手前から左奥に向かう方向)の中央付近の位置からは、下方(図6における左手前側)に突出する電源側端子39が形成されている。図8に示すように、電源側端子39は、裏側(図8における右側)に2回直角曲げされることでクランク状に形成されている。図8に示すように、この電源側端子39は、ロアケース13の下壁を貫通してコネクタハウジング15内に挿入されて、ワイヤーハーネスを介してバッテリーと接続された相手側コネクタと接続される。
続いて、本実施形態に係る電気接続箱10の製造工程の一例について説明する。図10に示すように、まず、図示しない金属板材をプレス加工する。これにより、略矩形状をなすフレーム41の内側に、複数の第1バスバー21がタイバー28によって接続された形態の連結バスバー23を形成する。
次に、本発明の実施形態2を図13ないし図22を参照して説明する。以下の説明においては、図14における上側を上方とし、下側を下方とする。また、図14における右側を右方とし、左を左方とする。また、図14における紙面の貫通方向手前側を表側とし、紙面の貫通方向奥側を裏側とする。
図18に示すように、ロアケース53は、合成樹脂製であって、上方に開口している。ロアケース53の下壁の上面には、表裏方向(図18における左右方向)の中央付近から、上方に突出すると共に、左右方向(図18において紙面を貫通する方向)に延びて、後述する第2バスバー78を挟持する挟持部77が形成されている(図17参照)。
図18ないし図20に示すように、両回路構成体52A,52Bは、間隔を空けて並べた複数の第1バスバー61と、この第1バスバー61の間に充填された合成樹脂材62とを含む。表側回路構成体52Aと、裏側回路構成体52Bとは、同一形状をなしている。
図18及び図19に示すように、ロアケース53に形成された挟持部77には第2バスバー78が表裏方向(図18における左右方向)から挟持されている。第2バスバー78は金属板材をプレス加工することで形成される。第2バスバー78の上端縁からは、ヒューズ装着部17内に挿入されてヒューズ16と接続される複数(本実施形態では10個)のヒューズ側端子64Bが上方に突出している。また、第2バスバー78の下端縁のうち、右端寄り(図17における右手前側)の位置には、下方に突出する電源側端子79が形成されている。この電源側端子79は、ロアケース53の下壁を貫通してコネクタハウジング15内に挿入されて、バッテリーとワイヤーハーネスを介して接続された相手側コネクタと接続される。
続いて、本実施形態に係る電気接続箱50の製造工程の一例について説明する。まず、金属板材をプレス加工する。これにより、金属板材を、略矩形状をなすフレーム41の内側に、複数の第1バスバー61がタイバー28によって接続された形態の連結バスバー23を形成する。
次に、本発明の実施形態3を図23及び図24を参照して説明する。以下の説明においては、図23における上側を上方とし、下側を下方とする。また、図23における右側を右方とし、左を左方とする。また、図24における上側を表側とし、下側を裏側とする。
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれる。
(1)実施形態1、及び2においては、回路構成体12,52A,52Bは連結バスバー23をインサート成形によって形成される構成としたが、これに限られず、予め切断された複数の第1バスバー21を金型内の所定位置に配置し、その後、インサート成形してもよい。
(2)実施形態1、及び2においては、回路構成体12,52A,52Bには、充填材34が充填される構成としたが、例えば、合成樹脂材22によって第1バスバー21,61又はリレー31から発生する熱を効率的に放散可能であれば、充填材34を省略できる。
(3)実施形態1、及び2においては、回路構成体12,52A,52Bには、均熱層35が形成される構成としたが、これに限られず、例えば、合成樹脂材22によって第1バスバー21,61又はリレー31から発生する熱を効率的に放散可能であれば、均熱層35を省略できる。この場合、第1バスバー21,61が回路構成体12の底壁26の裏面において露出する構成となる。すると、底壁26の裏面において露出した第1バスバー21,61に水や埃が付着して、短絡することが懸念される。そこで、この場合には、ケーシング11,51に開口部36を設けず、回路構成体12,52A,52Bがケーシング11,51により覆われる構成とすることにより、底壁26の裏面において露出した第1バスバー21,61に水や埃が付着することを抑制できる。
(4)実施形態1、及び2においては、電子部品としてリレー31を用いたが、これに限られず、半導体リレーでもよい。また、抵抗、コンデンサ等でもよい。
(5)実施形態3においては、回路構成体80には均熱層89が形成される構成としたが、これに限られず、均熱層89を省略してもよい。均熱層89を省略した場合、底壁84の裏面において露出した回路基板85に水や埃が付着して、短絡することが懸念される。そこで、この場合には、ケーシングに開口部を設けず、回路構成体80がケーシングにより覆われる構成とすることにより、底壁84の裏面において露出した回路基板85に水や埃が付着することを抑制できる。
(6)本実施形態において、バスバーにより形成された回路は、厚銅回路により形成される構成としてもよい。
Claims (10)
- ケーシングと、前記ケーシング内に収容される回路構成体と、を備える電気接続箱であって、
前記回路構成体は、間隔を空けて並べた複数のバスバーと、隣り合う前記複数のバスバー同士の間に配されて前記バスバーと密着する合成樹脂材と、を備え、前記合成樹脂材の熱伝導率は空気よりも大きい電気接続箱。 - 前記ケーシングには開口部が形成されており、前記開口部には前記回路構成体の少なくとも一部が露出している請求の範囲第1項に記載の電気接続箱。
- 前記合成樹脂材は前記バスバー同士の間に充填されている請求の範囲第1項または第2項に記載の電気接続箱。
- 前記回路構成体は、底壁と、前記底壁の外周縁から立設される側壁とを備え、前記回路構成体の前記底壁のうち前記側壁が立設された側の面には前記合成樹脂材から前記バスバーが露出した露出部が形成されており、前記露出部には電子部品が接続されており、前記底壁には、前記電子部品が接続された面と反対側の面に、前記合成樹脂材と連続して形成されると共に前記バスバーを覆ってなり、前記バスバーから発生した熱を分散する均熱層が形成されている請求の範囲第1項ないし第3項のいずれか一項に記載の電気接続箱。
- 前記回路構成体には、前記底壁と前記側壁とによって囲まれた領域内に、前記露出部を覆うと共に前記電子部品と接触する充填材が充填されている請求の範囲第1項ないし第4項のいずれか一項に記載の電気接続箱。
- 前記回路構成体は回路基板を含み、前記回路基板と前記バスバーとは電気的に接続されており、
前記回路構成体は、更に、底壁と、前記底壁の外周縁から立設される側壁とを備え、前記底壁のうち前記側壁が立設された側の面には前記底壁から前記回路基板の一方の面が露出しており、前記回路基板の一方の面には電子部品が接続されており、前記底壁には、前記回路基板の他方の面を覆うと共に、通電時に前記回路基板で発生した熱を分散する合成樹脂製の均熱層が形成されている請求の範囲第1項または第2項に記載の電気接続箱。 - 前記回路構成体には、前記底壁と前記側壁とによって囲まれた領域内に、前記回路基板の一方の面を覆うと共に前記電子部品と接触する充填材が充填されている請求の範囲第6項に記載の電気接続箱。
- 前記ケーシングの前記開口部には前記回路構成体の前記均熱層が露出している請求の範囲第4項または第6項に記載の電気接続箱。
- 前記回路構成体には、前記バスバーが前記合成樹脂材から外方に突出しており、前記合成樹脂材から突出した前記バスバーには、複数の前記バスバー同士を連結するタイバーを切断することにより切断部が形成されている請求の範囲第1項ないし第8項のいずれか一項に記載の電気接続箱。
- 前記回路構成体には、複数の前記バスバー同士を連結するタイバーが前記合成樹脂材から外方に突出しており、前記合成樹脂材から突出した前記タイバーには、前記タイバーを切断することにより切断部が形成されている請求の範囲第1項ないし第9項のいずれか一項に記載の電気接続箱。
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US12/864,600 US8426752B2 (en) | 2008-03-12 | 2009-03-12 | Electric connection box |
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- 2009-03-12 US US12/864,600 patent/US8426752B2/en not_active Expired - Fee Related
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2012
- 2012-08-06 JP JP2012173630A patent/JP5454636B2/ja not_active Expired - Fee Related
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JP2011124488A (ja) * | 2009-12-14 | 2011-06-23 | Anden | 電子回路装置 |
JP2016152399A (ja) * | 2015-02-19 | 2016-08-22 | 株式会社オートネットワーク技術研究所 | 基板ユニット |
WO2016132852A1 (ja) * | 2015-02-19 | 2016-08-25 | 株式会社オートネットワーク技術研究所 | 基板ユニット |
US10062633B2 (en) | 2015-02-19 | 2018-08-28 | Autonetworks Technologies, Ltd. | Substrate unit |
KR102215095B1 (ko) * | 2016-07-07 | 2021-02-10 | 몰렉스 엘엘씨 | 마이크로 배전 박스 및 애플리케이션 특정 전자기기 패키징 기법을 사용한 그의 제조 방법 |
KR20190018541A (ko) * | 2016-07-07 | 2019-02-22 | 몰렉스 엘엘씨 | 마이크로 배전 박스 및 애플리케이션 특정 전자기기 패키징 기법을 사용한 그의 제조 방법 |
KR20210016089A (ko) * | 2016-07-07 | 2021-02-10 | 몰렉스 엘엘씨 | 마이크로 배전 박스 및 애플리케이션 특정 전자기기 패키징 기법을 사용한 그의 제조 방법 |
KR102254148B1 (ko) * | 2016-07-07 | 2021-05-18 | 몰렉스 엘엘씨 | 마이크로 배전 박스 및 애플리케이션 특정 전자기기 패키징 기법을 사용한 그의 제조 방법 |
KR20210059006A (ko) * | 2016-07-07 | 2021-05-24 | 몰렉스 엘엘씨 | 마이크로 배전 박스 및 애플리케이션 특정 전자기기 패키징 기법을 사용한 그의 제조 방법 |
US11083088B2 (en) | 2016-07-07 | 2021-08-03 | Molex, Llc | Micro power distribution boxes and methods of manufacturing same using application specific electronics packaging techniques |
KR102384017B1 (ko) * | 2016-07-07 | 2022-04-08 | 몰렉스 엘엘씨 | 마이크로 배전 박스 및 애플리케이션 특정 전자기기 패키징 기법을 사용한 그의 제조 방법 |
KR20180120977A (ko) * | 2017-04-28 | 2018-11-07 | 현대모비스 주식회사 | 전자제어장치의 파워모듈 차폐장치 |
KR102352413B1 (ko) * | 2017-04-28 | 2022-01-18 | 현대모비스 주식회사 | 전자제어장치의 파워모듈 차폐장치 |
Also Published As
Publication number | Publication date |
---|---|
JP5333436B2 (ja) | 2013-11-06 |
JP5454636B2 (ja) | 2014-03-26 |
US20110005826A1 (en) | 2011-01-13 |
JPWO2009113631A1 (ja) | 2011-07-21 |
US8426752B2 (en) | 2013-04-23 |
JP2012235693A (ja) | 2012-11-29 |
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