JP2008086070A - Electrical connection box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrical connection box which can standardize a housing and can be reduced in size, when additionally installing a circuit. <P>SOLUTION: In the electrical connection box 10 which comprises a power supply module 11 provided with bus bars 15 to 21 connected to a power supply; a circuit plate 12 having a power distribution circuit; and the bus bars 15 to 21 are formed into band plate shapes, the circuit plate 12 and the power supply module 11 are arranged so that their longitudinal directions lie along the surface of the circuit plate 12 and are vertical, with respect to the surface when the circuit plate and the power supply module are assembled to each other; and a plurality of connecting metal fittings 35 for connecting the power distribution circuit, and the bus bars 15 to 21 are protrusively arranged on the circuit plate 12 so as to align in the longitudinal directions of the bus bars 15 to 21. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electrical junction box that is mounted on a vehicle such as an automobile and distributes power in order to supply power from a power source to various parts of the vehicle.

  As an example of an electrical connection box mounted on a vehicle, as shown in FIG. 4, a plurality of module plates 71 to 73 each having a wire 74 wired thereon are stacked and connected to a vehicle load system through a connector. There is known an electric connection box 70 in which the connection bar 75 is electrically connected to the electric wires 74 of the respective module plates via electric wire fittings (see Patent Document 1).

  In this electrical connection box 70, for example, in order to connect the connection bar 75 to the electric wire 74 arranged on the module plate 73, the connection bar 75 is passed through the module plates 71 and 72 arranged in the upper layer of the module plate 73. .

JP 2002-10444 A

  In the electrical junction box 70 disclosed in Patent Document 1, each connection bar 75 is arranged perpendicular to the module plates 71 to 73, but its longitudinal direction is perpendicular to the module plates 71 to 73. . Therefore, each connection bar 75 intersects each module plate 71 to 73 at one point.

  In the power distribution, a plurality of electric wires can be connected from one connection bar within the rated range. However, since the intersection between each connection bar 75 and each module plate 71 to 73 is limited to one point, each module plate When the wires 74 in 71 to 73 are added, the connection bar 75 needs to be added. It is also necessary to change the divided housing that holds the connection bar 75. For this reason, it is difficult to standardize the divided housing including the connection bar 75.

  And in order to connect with the some electric wire 74 with one connection bar 75, it is necessary to laminate | stack a several module plate and to penetrate these. For this reason, the thickness of the electrical junction box 70 tends to increase.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide an electrical junction box that can be standardized and can be miniaturized when a circuit is added.

  The above object is achieved by the following electrical junction boxes (1) to (4) according to the present invention.

(1) An electrical connection box comprising a power supply module provided with a bus bar connected to a power supply, and a circuit plate provided with a power distribution circuit,
The bus bar is formed in a strip shape, and when the circuit plate and the power supply module are assembled to each other, the longitudinal direction is arranged along the surface of the circuit plate and perpendicular to the surface. And
An electrical junction box, wherein a plurality of connection fittings for connecting the power distribution circuit and the bus bar are erected on the circuit plate so as to be arranged in the longitudinal direction of the bus bar.
(2) The electrical connection box according to (1) above, wherein a slot into which the bus bar is inserted is formed at a distal end portion of the connection fitting.
(3) The power distribution circuit is a printed circuit printed on the front surface and / or the back surface of the circuit plate,
The electrical connection box according to (1) or (2), wherein the connection fitting is soldered at the base end to the printed circuit.
(4) The power distribution circuit is composed of a plurality of electric wires wired on the front surface and / or the back surface of the circuit plate,
The electrical connection box according to (1) or (2), wherein the connection fitting has a pair of press contact blades at a base end thereof and is press contacted to the electric wire.

  According to the present invention, when the circuit plate and the power supply module are assembled to each other, the longitudinal direction of the bus bar formed in a strip shape is arranged along the surface of the circuit plate and perpendicular to the surface. A plurality of connection fittings are erected on the circuit plate so as to be arranged in the longitudinal direction of the bus bar. Therefore, a plurality of connection points between the bus bar and the circuit plate can be taken in the longitudinal direction of the bus bar, and it is not necessary to add the bus bar when adding the power distribution circuit. Thereby, a power supply module can be standardized. In addition, since it is not necessary to stack a plurality of circuit plates when one bus bar is connected to a plurality of distribution circuits, the electrical connection box can be downsized.

  Further, if the slot into which the bus bar is inserted is formed at the tip of the connection fitting, the bus bar and the power distribution circuit can be easily connected. For example, the bus bar and the power distribution circuit can be connected simultaneously with the assembly of the power supply module and the circuit plate.

  Hereinafter, a plurality of preferred embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
1 and 2 show a first embodiment of an electrical junction box according to the present invention, and FIG. 1 is an exploded perspective view for explaining the assembly relationship of components of the first embodiment of the electrical junction box of the present invention. FIG. 2 is an exploded perspective view of a circuit plate in a modification of the electrical junction box of the first embodiment.

  As shown in FIG. 1, the electrical junction box 10 according to the first embodiment of the present invention includes a power supply module 11, a circuit plate 12, and a case 13, and supplies power from the power source to various parts of the vehicle. Used for power distribution.

  The power supply module 11 includes a plurality of bus bars 15 to 21 and a power supply module housing 14 that holds the bus bars 15 to 21.

  The power supply module housing 14 is made of an insulating resin, and a pair of engaging protrusion receiving holes 25 are formed on the lower edge portions of both side walls. The case 13 is formed of an insulating resin, is formed in a box shape with the upper surface open, and a pair of engaging protrusions 39 are formed on the upper edge portions of both side walls. The power supply module housing 14 is assembled to the case 13 so that the engagement protrusion 39 of the case 13 is engaged with the engagement protrusion receiving hole 25 and the upper surface of the case 13 is covered.

  The circuit plate 12 includes a base 33 made of an insulating resin and formed into a frame shape, and a printed circuit board 34 placed on the base 33. The circuit plate 12 is held at a predetermined position inside the case 13 and is sandwiched between the case 13 and the power module housing 14 assembled to the case 13 as described above.

  The bus bars 15 to 21 are made of conductive metal and are formed in a strip shape. The bus bars 15 to 21 are aligned along the longitudinal direction of the surface of the printed circuit board 34 of the circuit plate 12 sandwiched between the case 13 and the power supply module housing 14 and are perpendicular to the surface. The power supply module housing 14 is arranged.

  A plurality of connector insertion ports 22 to 24 are provided on the front wall of the power supply module housing 14. Terminal portions of the bus bars 15 to 21 are terminal portions, and the terminal portions of the respective bus bars are arranged to protrude from any one of the connector insertion ports.

  For example, the terminal portion 26 of the first bus bar 15 is disposed in the left connector insertion port 22 in FIG. 1, and the terminal portions 27 to 30 of the second to fifth bus bars 16 to 19 are disposed in the central connector insertion port 23. Are arranged in two rows and two columns, and the terminal portions 31 and 32 of the sixth and seventh bus bars 20 and 21 are arranged in two columns in the right connector insertion opening 24.

  In the connector insertion port 23, the terminal portions of the second to fifth bus bars 16 to 19 are arranged in two rows in the vertical direction. However, as shown in the figure, the terminal portions of the bus bars are appropriately bent, and the terminals of the bus bars are arranged. All of the portions connected to the portions are along the surface of the printed circuit board 34.

  A power distribution circuit (not shown) is formed on the front surface and / or the back surface of the printed circuit board 34. A plurality of connection fittings 35 are erected on the surface of the printed circuit board 34. These connection fittings 35 are made of conductive metal, and a slot 37 into which the bus bars 15 to 21 can enter is formed at the tip.

  Each connection fitting 35 is arranged at a point where any one of the bus bars 15 to 21 arranged along the printed circuit board 34 and a circuit provided on the front surface or the back surface of the board 34 overlap, and the base end portion of the circuit board 35 is disposed on the circuit board 34. It is soldered and when it sees about each bus bar, it arrange | positions so that the slot 37 of the some connection metal fitting 35 may be located in a line along the longitudinal direction. The connection terminal 35 and a circuit provided on the back surface of the printed circuit board 34 are connected through a through hole 36 formed in the board 34.

  A plurality of downstream terminals 38 of the power distribution circuit are provided on the back surface of the printed circuit board 34, and these downstream terminals 38 protrude downward from the lower end edge of the base 33. . A plurality of terminal insertion holes 41 through which these downstream terminals 38 are inserted are formed in the bottom plate 40 of the case 13.

  When the power supply module housing 14 is assembled to the case 13 as described above so that the circuit plate 12 held at a predetermined position inside the case 13 is sandwiched between the case 13 and the bus bar 15 to 21 in the longitudinal direction, Are inserted into the slots 37 of the plurality of terminal fittings 35 arranged in line with the terminal fitting 35, and are sandwiched by the tip portions of the terminal fittings 35, and are electrically connected to the power distribution circuit of the printed circuit board 34 via the terminal fittings 35. Connected to.

  And the connector of the wire harness connected to the power supply of a vehicle is each inserted in the connector insertion ports 22-24 of the power supply module 11, and the connector of the wire harness connected to each place of the vehicle is the case 13 The terminal insertion hole 41 is connected to the downstream terminal 38 of the circuit plate 12 exposed to the outside of the case 13. Thereby, the electric power from a power supply is distributed in the electrical junction box 10, and is supplied to various places of a vehicle.

  As described above, according to the electrical connection box 10 of the present embodiment, when the circuit plate 12 and the power supply module 11 are assembled to each other, the longitudinal direction of the bus bars 15 to 21 formed in a strip shape is the circuit. A plurality of connection fittings 35 are erected on the circuit plate 12 so as to be arranged along the surface of the plate 12 and perpendicular to the surface, and arranged in the longitudinal direction of the bus bars 15 to 21. Therefore, a plurality of connection points between the bus bars 15 to 21 and the circuit plate 12 can be taken in the longitudinal direction of the bus bars 15 to 21, and it is not necessary to add bus bars when adding power distribution circuits. Thereby, the power supply module 11 can be standardized. In addition, since it is not necessary to stack a plurality of circuit plates when one bus bar is connected to a plurality of distribution circuits, the electrical connection box can be downsized.

  Further, a slot 37 into which the bus bars 15 to 21 are inserted is formed at the tip of the connection fitting 35 so that the bus bars 15 to 21 can be easily connected to the power distribution circuit. The bus bars 15 to 21 and the power distribution circuit can be connected at the same time as the assembly with 12.

  Next, with reference to FIG. 2, the modification of the electrical junction box 10 mentioned above is demonstrated.

  As shown in FIG. 2, in this modification, a plurality of circuit plates 42 and 43 are stacked. Predetermined power distribution circuits are respectively formed on the printed circuit boards 34 of the circuit plates 42 and 43, and a plurality of boards connected to any one of the bus bars 15 to 21 of the power supply module 11 are formed on the surface of each printed circuit board 34. The connection fittings 35 are erected.

  The length dimension of the connection fitting 35 of the second circuit plate 43 disposed in the lower layer is larger than the thickness dimension of the first circuit plate 42 disposed in the upper layer, and the printed circuit board 34 of the first circuit plate 42 includes Connection fitting insertion holes 44 through which the connection fittings 35 are inserted are formed at positions corresponding to the connection fittings 35 of the second circuit plate 43 when the two circuit plates 42 and 43 are laminated.

  When the circuit plates 42 and 43 are laminated, the connection fitting 35 of the second circuit plate 43 passes through the connection fitting insertion hole 44 of the first circuit plate 42 and the surface of the printed circuit board 34 of the first circuit plate 42. The front end portion that is exposed above and is provided with the slot 37 is positioned at the same height as the connection fitting 35 of the first circuit plate 42.

  The laminate of both circuit plates 42 and 43 is held at a predetermined position inside the case 13, and the power supply module 11 is sandwiched between the case 13 and the power supply module housing 14. Is assembled to the case 13 as described above. Accordingly, each of the bus bars 15 to 21 is electrically connected to the power distribution circuit of the first circuit plate 42 or the second circuit plate 43 via the terminal fitting 35 of the first circuit plate 42 or the second circuit plate 43. .

(Second Embodiment)
Next, a second embodiment of the electrical junction box according to the present invention will be described with reference to FIG. FIG. 3 is an exploded perspective view showing a part of the circuit plate in the second embodiment of the electrical junction box of the present invention. FIG. 3 shows only the periphery of the circuit plate, and the other parts are the same as those in the first embodiment, and are omitted. Further, in the following second embodiment, the same or equivalent components in the figure are denoted by the same reference numerals or equivalent symbols in the drawings to simplify the description or the like. Omitted.

  As shown in FIG. 3, in the circuit plate 50 used in the electrical junction box 10 ′ of the second embodiment of the present invention, a power distribution circuit is configured by a plurality of electric wires 52 wired to the base 51. For connection between the power distribution circuit and the bus bars 15 to 21 of the power supply module 11, a connection fitting 54 that is provided with a pair of press contact blades 53 at the base end portion and press-contacted to the electric wire 52 is used.

  The base 51 is provided with a plurality of guide portions 55 each having a pair of vertical plate shapes for holding a plurality of electric wires 52 at predetermined positions, and a connection fitting insertion recessed groove 56 is formed on the inner surface of the guide portion 55. Has been. A cover 57 is attached to the base 51. In the cover 57, a connection fitting insertion hole 59 is formed in the top plate 58, and a wire insertion notch 61 is formed in the side plate 60.

  After the electric wire 52 is inserted into the guide portion 55 of the base 51, the connection fitting 54 is pressed and inserted into the connection fitting insertion concave groove 56 of the guide portion 55. Thereby, the press contact blade 53 of the connection fitting 54 cuts the coating 62 of the electric wire 52 and is electrically connected to the core wire 63.

  After the connection fitting 54 is electrically connected to the electric wire 52, the cover 57 is attached to the base 51, and the tip of the connection fitting 54 provided with the slot 37 through the connection fitting insertion hole 59 of the cover 57 is the outside of the cover 57. Further, the electric wire 52 is pulled out from the electric wire insertion notch 61 of the cover 57. The drawn electric wire 52 is further drawn to the outside of the case 13 and connected to various parts of the vehicle.

  As described above, according to the electrical connection box 10 ′ of the present embodiment, when the circuit plate 50 and the power supply module 11 are assembled to each other, the longitudinal direction of the bus bars 15 to 21 formed in a strip shape is A plurality of connection fittings 54 are erected on the circuit plate 50 so as to be arranged along the surface of the circuit plate 50 and perpendicular to the surface, and arranged in the longitudinal direction of the bus bars 15 to 21. Therefore, a plurality of connection points between the bus bars 15 to 21 and the circuit plate 50 can be taken in the longitudinal direction of the bus bars 15 to 21, and it is not necessary to add bus bars when adding power distribution circuits. Thereby, the power supply module 11 can be standardized. In addition, since it is not necessary to stack a plurality of circuit plates when one bus bar is connected to a plurality of distribution circuits, the electrical connection box can be downsized.

  A slot 37 into which the bus bars 15 to 21 are inserted is formed at the tip of the connection fitting 54, so that the bus bars 15 to 21 can be easily connected to the power distribution circuit. 50 and the power distribution circuit can be connected to the bus bars 15 to 21 simultaneously.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimension, numerical value, form, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

It is a disassembled perspective view explaining the assembly | attachment relationship of each component of 1st Embodiment of the electrical junction box of this invention. It is a disassembled perspective view of the circuit plate in the modification of the electrical junction box of 1st Embodiment. It is a disassembled perspective view which fractures | ruptures and shows a part of circuit board in 2nd Embodiment of the electrical-connection box of this invention. It is a disassembled perspective view of the conventional electrical junction box.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Electrical connection box 11 Power supply module 12 Circuit plate 13 Case 15 1st bus bar 16 2nd bus bar 17 3rd bus bar 18 4th bus bar 19 5th bus bar 20 6th bus bar 21 7th bus bar 34 Printed circuit board 35 Connection metal fitting 37 Slot 42 1st circuit plate 43 2nd circuit plate 50 Circuit plate 52 Electric wire 53 Press contact blade 54 Connecting metal fitting

Claims (4)

An electrical junction box comprising a power supply module provided with a bus bar connected to a power supply, and a circuit plate provided with a power distribution circuit,
The bus bar is formed in a strip shape, and when the circuit plate and the power supply module are assembled to each other, the longitudinal direction is arranged along the surface of the circuit plate and perpendicular to the surface. And
An electrical junction box, wherein a plurality of connection fittings for connecting the power distribution circuit and the bus bar are erected on the circuit plate so as to be arranged in the longitudinal direction of the bus bar.   The electrical connection box according to claim 1, wherein a slot into which the bus bar is inserted is formed at a distal end portion of the connection fitting. The power distribution circuit is a printed circuit printed on a front surface and / or a back surface of the circuit plate;
The electrical connection box according to claim 1, wherein a base end portion of the connection fitting is soldered to the printed circuit. The power distribution circuit is composed of a plurality of wires arranged on the front surface and / or the back surface of the circuit plate,
The electrical connection box according to claim 1, wherein the connection fitting has a pair of press contact blades at a base end portion thereof and is press contacted with the electric wire.

Images