JP3990097B2 - Electrical junction box - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention mainly relates to an electrical junction box mounted on a vehicle.
[0002]
[Prior art]
As a related technique of the present invention, there is a technique disclosed in Japanese Utility Model Laid-Open No. 6-80318 shown in FIGS.
[0003]
In FIG. 11, the code | symbol J has shown the electrical junction box. The electrical junction box J is connected to the cover body 1 made of an insulating synthetic resin, the sub-wire harnesses SW1, SW2, SW3 made up of a plurality of electric wires W sorted for each load system, and the sub-wire harness SW1. The back cover 2, the back cover 3 to which the sub-wire harness SW2 is connected, and the back cover 4 to which the sub-wire harness SW3 is connected are roughly configured. Each of the back covers 2, 3, 4 is abutted against the cover body 1 and fixed.
[0004]
As shown in FIG. 11, for example, a relay cavity 5, a fuse cavity 6, a female connector cavity 7, and a fusible link cavity 8 are appropriately disposed on the outer surface of the cover body 1 at positions corresponding to the back covers 2, 3, and 4. Is formed.
[0005]
FIG. 12 is an exploded perspective view of the main part when the electrical junction box J is viewed from the back side.
[0006]
As shown in the figure, bus bars 10 and 11 bent in an L shape are interposed between the cover body 1 and the back cover 2 and between the cover body 1 and the back cover 3, respectively. The bus bars 10 and 11 constitute internal circuits of the sub-wire harnesses SW1 and SW2 in the electrical junction box J. Support walls 14 and 15 having bus bar holding grooves 12 and 13 are erected on the inner surface of the ceiling wall 1a of the cover main body 1, and various relays are provided at end portions and intermediate portions of the support walls 14 and 15. A plurality of terminal accommodating chambers 17 corresponding to the terminals 16 are provided in a protruding manner. FIG. 13 is an equivalent circuit diagram showing a state where the sub-wire harnesses SW1 and SW2 are connected to the main part of the electrical junction box J described above.
[0007]
[Problems to be solved by the invention]
By the way, in the above-described prior art, as shown in FIG. 11, the back cover 2, 3, 4 to which the sub-wire harnesses SW1, SW2, SW3 are respectively connected is assembled to the cover body 1. However, when the number of back covers is increased, the flat area (projected area) of the cover body 1 is increased, and there is a problem that the electric junction box J becomes large. In particular, since the installation space is limited in an in-vehicle electrical junction box, the increase in size of the electrical junction box is a problem.
[0008]
Moreover, in this electrical junction box J, a relay cavity installed in the cover body 1 is formed in order to substantially form a circuit by the bus bars 10 and 11 interposed between the cover body 1 and the back covers 2, 3 and 4. 5. When changing the arrangement of the fuse cavities 6, female connector cavities 7, fusible link cavities 8, etc. or adding connections in accordance with circuit changes, it may be necessary to change the patterns of the bus bars 10, 11. This complicates the response. For this reason, in the in-vehicle electrical junction box, it is necessary to prepare bus bars each having a unique pattern in advance when the vehicle type and standard are different.
[0009]
In addition, in this prior art, although the case of the electrical connection box J provided with the bus bars 10 and 11 as a circuit component is shown, also when performing a circuit structure with the wiring by an electric wire, it changes for every kind of electric wire connection box. Wiring connection work was necessary.
[0010]
As described above, the conventional electrical junction box J has a problem that it cannot be easily handled when a circuit change is required according to the vehicle type or standard.
[0011]
An object of the present invention is to provide an electrical junction box that can be simplified and downsized in configuration and can easily cope with circuit changes due to differences in vehicle types and standards.
[0012]
[Means for Solving the Problems]
According to the first aspect of the present invention, a module plate is prepared for each of the plurality of sub-wire harnesses constituting the wire harness, and each electric wire of the sub-wire harness corresponding to each of the connection fittings arranged on the plate body of each module plate is press-fitted. By connecting and laminating the module plates to each other, a laminated body of module plates is formed, and the connection that is connected to the electrical junction box cover by passing through a connection bar that penetrates through the layers to the laminated body of the module plates An electrical connection box in which a desired circuit is configured as a whole by pressing the bar to the connection fitting and electrically connecting the connection members between the layers,
Further the laminate of the module plate, connection plate having a connection terminal on one side to conduct the connecting bars are stacked, the electronic control unit disposed on the side face of the stack of the module plates and connecting plates, electronic A control unit and the connection plate are electrically connected via the connection terminals, and the connection plate is connected to the plate body and a plurality of connections arranged on one side of the plate body for electrical connection with the electronic control unit. And a circuit forming means for selectively electrically connecting any one of the connection bar and the connection terminal. The circuit forming means includes a rib provided on the plate body, and the rib. A connection member supported at a position corresponding to the connection bar to be conducted, and any of the connection member and the connection terminal A wiring conductor for selectively conducting to each other, characterized by comprising more.
[0013]
In the electrical junction box according to the present invention, the connection plate is laminated together with the module plate, and the connection terminal is provided on one side surface of the connection plate. Electrical connection between the module plates can be easily performed. In that case, without changing the basic configuration of the main part of the electrical connection box (the part corresponding to the main body of the module plate or connection plate), changing the wiring pattern of the wires on the module plate, connecting members, connection bars, Since the internal circuit can be changed by appropriately selecting the location of the connection terminals, it is possible to easily cope with differences in vehicle types and standards.
[0015]
Moreover, in the electrical junction box of this invention, since the electronic control unit is arrange | positioned at the side surface of the laminated body of a module plate and a connection plate, the electrical junction box with an electronic control unit of a compact structure can be provided. In this case, since the upper and lower surfaces of the laminated body of the module plate and the connection plate are open, it can be easily integrated with the branch connector, the power supply unit, and the like.
[0017]
In the electrical junction box of the present invention, the connection plate itself includes circuit forming means for selectively electrically connecting any of the connection bar and the connection terminal. The circuit can be easily changed. Therefore, the specification change of the electronic control unit can be easily handled.
[0019]
Further, in the electrical junction box of the present invention, by appropriately determining the position of the connection fitting arranged on the connection plate according to the position of the connection bar to be conducted, and arranging the wiring conductor correspondingly, The circuit on the connection plate can be freely configured.
[0020]
A second aspect of the present invention is the electrical junction box according to the first aspect, wherein an electric wire is used as the wiring conductor.
[0021]
In the electrical junction box of the present invention, since the electric wire is used as the wiring conductor, the circuit can be easily changed by changing the wiring pattern of the electric wire.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0023]
FIG. 1 is an exploded perspective view of an electrical connection box 50 according to an embodiment for connecting a wire harness WH, and FIG. 2 shows a state in which an electronic control unit (ECU) 80 is integrally attached to a side surface portion of the electrical connection box 50. It is a schematic side view shown.
[0024]
As shown in FIG. 1, the wire harness WH in this case is composed of a plurality of sub-wire harnesses SW1, SW2, and SW3, and each sub-wire harness SW1, SW2, and SW3 is a wire assembly that is composed of a plurality of covered wires W, respectively. It is structured as a body.
[0025]
The electrical connection box 50 is for connecting the plurality of module plates 51, 52, 53 prepared for each of the sub-wire harnesses SW1, SW2, SW3 to the electronic control unit (electronic circuit unit) 80 shown in FIG. A connection plate 70, a power supply unit 40 functioning as an electric connection box body, a divided housing 55 functioning as an electric connection box cover, and a plurality of connection bars 54 for forming a circuit.
[0026]
One end sides of the plurality of electric wires W of the sub-wire harnesses SW1, SW2, and SW3 are connected to the module plates 51, 52, and 53, respectively.
[0027]
As shown in FIG. 3, the power supply unit 40 includes a housing main body 41 and a branch plate portion 42 that extends to the side of the housing main body 41. Various cavities 43 such as a relay cavity, a fuse cavity, a female connector cavity, and a fusible link cavity are appropriately formed on the upper surface of the housing body 41.
[0028]
A branch circuit is formed on the upper surface of the branch plate portion 42 by arranging and laying a plurality of branch wires 44 branched from an internal circuit (not shown) of the housing body 41.
[0029]
As shown in FIGS. 4 and 5, the module plates 51, 52, and 53 have a rectangular plate main body 20 having an area that can be accommodated on the upper surface of the branch plate portion 42 of the power supply unit 40, and an upper surface of the plate main body 20. It has an electric wire receiving groove 57 partitioned by a plurality of partition walls 56, and an electric wire connecting fitting (connecting member) 59 that is arranged in the electric wire receiving groove 57 and to which an end or an intermediate portion of the electric wire is connected.
[0030]
On each of the module plates 51, 52, and 53 having such a configuration, a plurality of electric wire connection fittings 59 are placed. These electric wire connection fittings 59 are arranged on the respective module plates 51, 52 and 53 in accordance with a preset layout such as a circuit configuration to be formed and a position selection of the branch wiring. In this case, an arbitrary circuit can be appropriately formed depending on the position of the wire connection fitting 59, the position where the connection bar 54 is inserted, and the like, and can easily cope with the circuit change.
[0031]
The wire connection fitting 59 is positioned slightly laterally from the wire holding portion 59A disposed in the wire receiving groove 57 between the partition walls 56 in the width direction of the module plates 51, 52, and 53, and the end of the wire holding portion 59A. And a square cylindrical bar contact portion 59B. Two pairs of opposed bent pieces 59a, 59a, 59b, 59b and two pairs of press-fitting blades 59c, 59c, 59d, 59d are erected on the electric wire holding portion 59A. The bent pieces 59a and 59b can hold the electric wire W by bending them inward, and the press-fitting blades 59c and 59d press-fit the electric wire W into the gap between the press-fitting blades 59c and 59d. Thus, the covering portion 60 of the electric wire W is cut and brought into contact with the conducting wire portion 61 for connection.
[0032]
In addition, the rectangular tube-shaped bar contact portion 59B is arranged so that its tube hole communicates with a plurality of through holes 58 formed in each of the module plates 51, 52, and 53. In the tube hole, a contact spring piece 62 is provided for pressure contact with the connection bar 54. In addition, this electric wire connection fitting 59 is set so that it may press-fit between the partition walls 56, and is hold | maintained at the plate main body 20 side by press-fitting.
[0033]
Such a wire connection fitting 59 is disposed at an appropriate position of the module plates 51, 52, 53, and the module plates 51, 52, 53 are laminated in order, and then the connection bar 54 is attached to the laminated body of the module plates. A predetermined circuit can be configured by penetrating the cable.
[0034]
On the other hand, the connection plate 70 is prepared for connecting the electronic control unit 80, and is laminated together with the module plates 51, 52 and 53. As shown in FIG. 6, the connection plate 70 includes a plate main body 71, a plurality of connection tabs (connection terminals) 72 arranged on one side of the plate main body 71, a wire connection fitting 59 having the same structure as described above, a circuit It is comprised from the several electric wire 73 of various length for formation.
[0035]
The plate main body 71 is provided with ribs 74, and by supporting the ribs 74, the wire connection fitting 59 can be arranged and fixed at an arbitrary position corresponding to the connection bar 54. Also in this case, the rectangular tube-shaped bar contact portion 59B of the wire connection fitting 59 is disposed at a through hole position (not shown) of the plate body 71, and the connection bar 54 inserted through the bar contact portion 59B is passed through the through hole. It can be penetrated to other layers. As shown in FIG. 7, the connection tab 72 is fixed to the plate body 71 by being fitted into a tab holding groove 75 formed in the peripheral wall 71 a of the plate body 71.
[0036]
At the rear part of the connection tab 72, there is provided a wire pressure contact portion 72 a capable of press-connecting the covered wire from above, and fitted to the locking groove portion 75 a of the tab holding groove 75 on both side edges of the intermediate portion of the connection tab 72. A protruding piece 72b is provided for preventing the falling out. Each connection tab 72 protrudes outward from the peripheral wall 71a of the plate body 71, the wire pressure contact portion 72a is fitted into the tab holding groove 75, and the projection piece 72b is fitted into the locking groove portion 75a. It is securely fixed so that it does not come off on one side. The tab holding grooves 75 are arranged in a large number on the peripheral wall 71 a of the plate main body 71 so that the connection tabs 72 can be attached to the arbitrary tab holding grooves 75.
[0037]
Further, as shown in FIG. 10, the split housing 55 covers the laminated plate 63 of the module plates 51, 52, 53 and the connection plate 70 placed on the branch plate portion 42 from above, and the branch plate portion 42 is engaged. Thus, by covering the module plate laminate 63 with the divided housing 55, it is possible to prevent the wire connection fitting 59 and the connection bar 54 from being exposed. The split housing 55 is formed with a plurality of slits 55 </ b> A parallel to the vertical direction (stacking direction) for leading out the electric wires W arranged on the module plates 51, 52, and 53. Further, on the upper surface of the divided housing 55, hood portions 64, 65, and 66 that form branch connectors are formed. In the hood portions 64, 65, 66, the end portions of the connection bars 54 are fixed so as to stand up as connector pins (connector terminals).
[0038]
The individual configuration of each member has been described above. Next, how to configure the electrical junction box 50 will be described mainly using FIGS. 8 to 10. Here, a case where three or more module plates are stacked will be described, and all the module plates will be described as 51.
[0039]
When making the electrical connection box 50, first, as shown in FIG. 8A, the wire connection fitting 59 is press-fitted and arranged in the wire receiving groove 57 at a predetermined position of each module plate 51, and then the wire connection fitting 59 is provided. Is fixed to the module plate 51 side. At this time, it arrange | positions so that the through-hole 58 (refer FIG. 5) formed in the module plate 51 and the cylinder hole of the bar contact part 59B of the electric wire connection fitting 59 may connect.
[0040]
Next, as illustrated in FIG. 8B, the electric wires W are connected to the electric wire connection fittings 59 arranged on the respective module plates 51. In order to connect the electric wire W to the electric wire connection fitting 59, the covering portion 60 of the electric wire W is cut by inserting the electric wire W between the press-fitting blades 59c and 59c and between the press-fitting blades 59d and 59d. The conducting wire part 61 contacts and is connected to the press-fitting blades 59c and 59d. In addition, after the electric wire W is press-fitted between the press-fitting blades 59c and 59d, the electric wire W can be fixed to the electric wire connection fitting 59 by bending the bent pieces 59a and 59b so as to surround the electric wire W, respectively. .
[0041]
In this embodiment, the end portion of the electric wire W is connected to the electric wire fitting 59, but a portion in front of the end portion of the electric wire W may be connected. Thus, the electric wire group connected to each module plate 51 constitutes a sub-wire harness.
[0042]
On the other hand, as shown in FIG. 6, the connection plate 70 arranges and fixes the connection tab 72 and the wire connection fitting 59 at appropriate positions, and connects the corresponding connection tab 72 and the wire connection fitting 59 to the cloth of the wire 73. It is configured by conducting with a line. The connection between the electric wire W and the connection tab 72 is performed by press-contacting the electric wire W to the electric wire pressure contact portion 72 a of the connection tab 72. Further, the connection between the electric wire W and the electric wire connection fitting 59 is as described above.
[0043]
When the assembly of the module plate 51 and the connection plate 70 is completed, as shown in FIG. 9A, the plurality of module plates 51 and the connection plate 70 are stacked in a predetermined order to form a laminated body 63. As shown in B), the stacked body 63 of the module plate 51 and the connection plate 70 is placed on the branch plate portion 42 of the power supply unit 40.
[0044]
Further, as shown in FIG. 10A, a connection bar 54 is inserted into a predetermined through hole 58 of the module plate 51 on the uppermost layer of the laminate 63, and the lower end of the connection bar 54 is connected to the power supply unit 40. The laminated body 63 is penetrated until the branch plate portion 42 is reached.
[0045]
The reason why the lower end portion of the connection bar 54 is inserted so as to reach the branch plate portion 42 is that the lower end portion of the connection bar 54 abuts on the branch plate portion 42 to prevent further downward movement. This is to enable connection to the branch wiring 44 disposed on the branch plate portion 42 as necessary.
[0046]
Next, as shown in FIG. 10B, the divided housing 55 is covered so as to cover the laminated body 63 placed on the branch plate portion 42, and the lower end portion of the split housing 55 and the branch plate portion 42 Is engaged by engagement means (not shown). Thus, even if the divided housing 55 is placed on the laminated body 63, the electric wires W in the respective rows are accommodated in the slits 55 </ b> A of the divided housing 55, so that the electric wires W are not prevented from being led out from the divided housing 55.
[0047]
Further, by covering the laminated body 63 with the divided housing 55 in this way, the connection bar 54 is erected so that the upper end portion of the connection bar 54 stands up in the hood portions 64, 65, 66 formed on the upper surface of the divided housing 55. The length of is set. Therefore, when the upper end portion of the connection bar 54 stands up in the hood portions 64, 65, 66, the upper end portion of the connection bar 54 functions as a connector pin (connector terminal), and a branch connector is configured. In addition, this branch connector can be appropriately connected to a vehicle load system, for example.
[0048]
By following such a procedure, the electric junction box 50 is completed.
[0049]
Since the electrical connection box 50 is provided with a connection plate 70 having connection tabs 72 on one side surface at the lower layer of the laminate 63, an electronic control is provided on the side surface of the electrical connection box 50 as shown in FIG. By arranging the unit 80 and fitting the female connector 83 of the electronic control unit 80 to the connection tab 72 and engaging the protective cover 84 of the electronic control unit 80 with the engaging portion on the electric connection box 50 side, The electrical connection box 50 and the electronic control unit 80 can be electrically connected, and the electrical connection box 50 with the electronic control unit 80 in a compact form can be provided. In particular, in the case of the electric connection box 50, the electric wires W and 73 on the module plate 51 and the connection plate 70 are not changed at all without changing the basic configuration of the main body portion (portion corresponding to the main body of the module plate 51 and the connection plate 70). The internal circuit can be changed by changing the wiring pattern of the cable and by appropriately selecting the arrangement location of the wire connection fitting 59, the connection bar 54, and the connection tab 72. It can correspond to.
[0050]
The electronic control unit 80 includes an electronic component 82 and a female connector 83 mounted on a substrate 81, and the substrate 81 is covered with a protective cover 84.
[0051]
【The invention's effect】
As described above, according to the invention of claim 1, since the connection plate having the connection terminal on one side surface is laminated together with the module plate, the external electronic circuit unit, the connection plate, and the connection plate are connected by the connection terminal. Electrical connection between the module plates can be easily performed. In addition, without changing the basic configuration of the main body portion of the electrical connection box, by changing the wiring pattern of the wires on the module plate and appropriately selecting the location of the connection members, connection bars, and connection terminals, Since it is possible to easily change the internal circuit, it is easy to deal with differences in vehicle types and standards. In addition, since the electrical connection box is configured by penetrating the connection bar through the laminated body of the module plate and the connection plate, even when the circuit becomes complicated, the plane area does not increase, and the configuration is simplified and compact. Can be achieved.
[0052]
Further, since the electronic control unit is arranged on the side surface of the laminated body of the module plate and the connection plate, there is an effect that it is possible to easily provide an electric connection box with the electronic control unit in a compact form.
[0053]
In addition, since the connection plate itself includes circuit forming means for selectively electrically connecting any of the connection bar and the connection terminal, it is possible to easily change the circuit inside the connection plate itself. As a result, it is possible to easily cope with changes in the specifications of the electronic control unit .
[0054]
In addition, since the circuit on the connection plate is configured by arranging the wiring conductor according to the position of the connection fitting arranged on the connection plate, it is possible to flexibly cope with the circuit change. Play.
[0055]
According to the invention of claim 2, in addition to the effect of the invention of claim 1, since the electric wire is used as the wiring conductor, the circuit can be changed more easily by changing the wiring pattern of the electric wire. There is an effect that can be done.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of an electrical junction box according to an embodiment of the present invention.
FIG. 2 is a schematic side view showing a state in which an electronic control unit is attached to the electrical junction box according to the embodiment of the present invention.
FIG. 3 is a perspective view of a power supply unit in the electrical junction box.
FIG. 4 is a perspective view of a module plate in the electrical junction box.
FIG. 5 is a perspective view of a main part for explaining an attachment position of a wire connection fitting in the electric connection box.
FIG. 6 is an exploded perspective view of a connection plate in the electrical junction box.
FIG. 7 is an exploded perspective view of a main part of the connection plate.
FIGS. 8A and 8B are perspective views showing a process for assembling the electrical junction box. FIGS.
9A and 9B are perspective views showing the next step of FIG. 8 for assembling the electrical junction box.
FIGS. 10A and 10B are perspective views showing the next step of FIG. 9 for assembling the electrical junction box.
FIG. 11 is an exploded perspective view showing a conventional electrical junction box.
FIG. 12 is an exploded perspective view showing a conventional electrical junction box.
FIG. 13 is an equivalent circuit diagram of a conventional electrical junction box and a sub-wire harness connected thereto.
[Explanation of symbols]
20 Plate body 40 Power supply unit 50 Electrical connection box 51, 52, 53 Module plate 54 Connection bar 59 Wire connection fitting (connection member)
63 Laminate 70 Connection Plate 71 Plate Body 72 Connection Tab (Connection Terminal)
73 Electric wire (routing conductor)
74 Rib 80 Electronic control unit (electronic circuit unit)
W Electric wire WH Wire harness SW1, SW2, SW3 Sub-wire harness

Claims (2)

Module plates are prepared for each of the plurality of sub-wire harnesses constituting the wire harness, and the module plates are connected to each other by press-fitting and connecting the respective wires of the sub-wire harness corresponding to the connection fittings arranged on the plate body of each module plate. By laminating, the module plate laminate is formed, and the connection bar penetrating the interlayer is passed through the module plate laminate, and the connection bar connected to the electrical connection box cover is pressed against the connection fitting. Then, by electrically connecting the connection members between the respective layers, an electrical connection box in which a desired circuit is configured as a whole,
Further the laminate of the module plate, connection plate having a connection terminal on one side to conduct the connecting bars are stacked, the electronic control unit disposed on the side face of the stack of the module plates and connecting plates, electronic The control unit and the connection plate are electrically connected via the connection terminals, and the connection plate is connected to the plate body and a plurality of connections arranged on one side of the plate body for electrical connection with the electronic control unit. And a circuit forming means for selectively electrically connecting any one of the connection bar and the connection terminal. The circuit forming means includes a rib provided on the plate body, and the rib. A connection member supported at a position corresponding to the connection bar to be conducted, and any of the connection member and the connection terminal; Electrical connection box to the wiring conductor for selectively conducting to each other, characterized by comprising more. The electrical junction box according to claim 1,
An electric junction box, wherein an electric wire is used as the wiring conductor .

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