JP5149071B2 - Power distribution structure for electrical junction box - Google Patents

Description

  The present invention relates to a power distribution structure for an electrical connection box in which a power distribution unit is mounted as a block assembly in a frame.

  FIG. 8 shows a longitudinal section of one form of a conventional electrical junction box (see Patent Document 1).

  The electrical connection box 61 is fitted from below into an insulating resin frame 62, two fuse blocks 63 and 64 inserted and locked into the frame from below, and connectors on the lower side of the fuse blocks 63 and 64, respectively. It is provided with mating connectors 65 and 66 to be connected together.

  One fuse block 63 has a fuse mounting portion (not shown) for connecting a blade-type fuse at the top, and the fuse is connected to an electric wire 67 on the mating connector 65 side. The other fuse block 64 accommodates a plurality of fusible links (not shown), and the fusible links are connected to the electric wires 68 on the mating connector 66 side. A partition wall 91 is formed in the frame 62 to partition the fuse blocks 63 and 64.

  As an electrical junction box other than the above, the thing described in patent document 2, for example is mentioned.

This electrical junction box is composed of an insulating resin frame, a plurality of cassette blocks mounted in the frame, relays and fuses mounted on the upper part of each cassette block, and upper and lower covers attached to the upper and lower openings of the frame. Each cover is provided. In the electric junction box, for example, power from a battery of an automobile is supplied by an electric wire circuit.
JP 2006-320147 A (FIG. 3) JP 2007-68274 A (FIGS. 1 to 2)

  FIGS. 9 to 10 show other forms of the electrical connection box, that is, a power distribution unit 70 for power distribution inside a frame 69, and a connection block 74 for connecting a relay 71, a fuse 72 and a fusible link 73 to the upper part. The electrical connection box 76 having a structure in which is attached through a vertical partition wall 75 is shown.

  The power distribution unit 70 is also called power integration. The lower connector 77 is connected to the connector 79 of the connection block 74 and the fuse mounting portion 80 via the electric wires 78, and the power from the 12V battery of the automobile is connected to the connection block 74, for example. Are supplied from the connector 81 to the connection block 74 and supplied to the power distribution unit 70 via the electric wires 78.

  FIG. 11A shows one form of the power distribution unit 70, and a horizontally long case 82 made of an insulating resin, and a circuit board 83 (FIG. 11B) arranged vertically in the case. Electrical and electronic components such as a plurality of relays 84 surface-mounted (connected) to the circuit board 83, a fuse connection terminal 85 and a connector connection terminal 86 projecting upward from the top of the circuit board 83, A connector connecting terminal 87 projecting downward from the lower part of the circuit board 83 and a connector block body 88 made of an insulating resin attached to the lower part of the case 82 are provided.

  A fuse mounting portion 89 and a connector housing 90 are integrally formed on the upper portion of the case 82. As shown in FIG. 9, the connector 77 at one end of the connector block 88 is connected to the connector 79 of the connection block 74 through the electric wire 78. Power is supplied from the lower connector block 88 to the load side (not shown).

  However, in the electric junction box power distribution structure shown in FIGS. 9 to 11, in order to insert and lock the power distribution unit 70 in the frame 69, the horizontally long partition wall 75 surrounding the frame in a rectangular shape is provided. The space in the frame is narrowed by the partition wall 75 and the case 82 of the power distribution unit 70 in contact therewith, and the housing space of the connection block 74 is insufficient. To avoid this, the frame 69, that is, the electrical connection box is enlarged. The problem of doing.

  In addition, a plurality of wires 78 connecting the power distribution unit 70 and the connection block 74 require a large space in the lower cover, leading to enlargement of the electrical connection box, or connecting the connector with the wires 78 to the power distribution unit 70. This causes a problem that many man-hours are required to connect to the connection block 74.

  In view of the above points, the present invention eliminates the enlargement of the electrical connection box and the increase in the number of man-hours for electric wire connection due to the use of the power distribution unit, and the power distribution of the electrical connection box is compact and has good connection workability. The purpose is to provide a structure.

  In order to achieve the above object, a power distribution structure for an electrical junction box according to claim 1 of the present invention is such that electrical and electronic components are mounted on a vertically placed circuit board, and terminals are vertically provided from the circuit board. A block main body configured to be adjacent to and integrally formed with a power distribution unit, a unit accommodating portion for accommodating the power distribution unit, and a connection block portion main body for mounting electric components; A plate part mounted on the block main body and located on the unit housing part side and a plate part located on the connection block part main body side are integrally provided, and terminals for connecting electrical components project to each plate part. And an electric component that interconnects the terminals on the upper side of the power distribution unit and the terminals on the plate portion located on the unit accommodating portion side.

  With the above configuration, the power distribution unit and the connection block portion on which the electrical component is mounted are connected and integrated by the bus bar in the block body and the electrical component, thereby forming a block assembly. The block main body acts as a case of the power distribution unit to protect the circuit board and electrical / electronic components. A power supply distribution unit in which a power supply distribution unit and a connection block portion are assembled in the frame at the same time by mounting a block assembly (electrical parts may not be mounted) in the frame, and separately assembled in the frame. And a partition wall that separates the connection block from each other in the frame. The lower terminal of the circuit board mainly supplies power to the load side.

  A power distribution structure for an electrical junction box according to claim 2 is the power distribution structure for an electrical junction box according to claim 1, wherein the terminal on the lower side of the power distribution unit is disposed in a connector block body, and the connector block The main body is attached to a lower part of the unit accommodating portion.

  With the above configuration, each terminal on the lower side of the power distribution unit is accommodated in the connector block body to constitute a connector block, and the connector block is assembled to the unit accommodating portion. The load-side wire circuit is connected to the connector housing of the connector block. The power distribution unit and the connector block main body may be positioned and fixed by the lower terminal and the connector block main body, or may be fixed by the circuit board and the connector block main body. The connector block is locked to the unit accommodating portion.

  A power distribution structure for an electrical connection box according to claim 3 is the power distribution structure for an electrical connection box according to claim 1 or 2, wherein horizontal wall portions are provided above and below the circuit board, and the upper and lower terminals are connected to the upper and lower terminals. It is characterized by being disposed through the upper and lower wall portions, and the electric and electronic parts are disposed between the upper and lower wall portions.

  With the above configuration, the upper and lower terminals are positioned and fixed on the upper and lower wall portions, and electrical and electronic parts such as relays and resistors are protected from interference with the outside between the upper and lower wall portions. The upper and lower terminals are bent in an L shape and connected to the circuit board. Each terminal may be inserted into a terminal insertion hole in the upper and lower wall portions, and each terminal may be fixed to the upper and lower wall portions by insert molding.

  The power distribution structure of the electrical junction box according to claim 4 is the power distribution structure of the electrical junction box according to claim 3, wherein a vertical bus bar terminal for through connection is disposed through the upper and lower walls. It is characterized by.

  With the above configuration, the upper terminal portion of the bus bar terminal is interconnected by the electrical component together with the upper terminal on the circuit board side. The lower terminal portion of the bus bar terminal is disposed in the connector block body. A circuit board is connected to the load side via a bus bar terminal. If the bus bar terminal is arranged in front of the electric / electronic component and the circuit board is arranged behind the electric / electronic component, the electric / electronic component can be protected from interference with the outside by the bus bar terminal.

  A power distribution structure for an electrical junction box according to a fifth aspect is the power distribution structure for an electrical junction box according to any one of the first to fourth aspects, wherein the electrical component is a fuse.

  With the above configuration, the terminal on the circuit board side of the power distribution unit and the terminal on the bus bar are connected to each other via the fuse, and for example, the power input from the bus bar plate on the connection block side is prevented from overcurrent by the fuse. Safely supplied to the power distribution unit.

  The power distribution structure of the electrical junction box according to claim 6 is the power distribution structure of the electrical junction box according to any one of claims 1 to 5, wherein the plate portion located on the side of the connection block portion main body is for power input. A terminal is provided.

  With the above configuration, power is input to the terminal of the bus bar plate, power is supplied from the connection block side to the upper terminal of the power distribution unit, and power is supplied from the lower terminal to the load side.

  According to the first aspect of the present invention, since the power distribution unit and the connection block portion are integrated in the block body, a conventional partition wall that partitions the power distribution unit and the connection block portion in the frame becomes unnecessary, and The block main body acts as a case of the power distribution unit, so that the conventional case becomes unnecessary, the enlargement of the frame caused by the partition wall and the case is eliminated, and the electrical junction box is made compact. Further, the power distribution unit and the connection block portion are integrated by the block main body and are assembled into the frame at the same time, so that the assembly workability of the electric connection box is improved. In addition, the electric wires that used to connect the power distribution unit and the connection block to the connector instead of the bus bar have been replaced with a space-saving cover that can be attached to the frame to accommodate these wires, and the electric connection box has been made compact. In addition, troublesome connector connection work is abolished and assembly workability of the electric connection box is improved.

  According to the second aspect of the invention, the assembly workability of the electrical junction box is improved by integrating the power distribution unit and the connector block into the unit housing portion of the block main body.

  According to the third aspect of the present invention, a space-saving and compact power distribution is achieved by the circuit board, the upper and lower wall portions, the electric and electronic parts between the upper and lower wall portions, and the upper and lower terminals protruding from the upper and lower wall portions. Unit is configured.

  According to the invention of claim 4, by connecting the upper terminal portion of the bus bar terminal to the upper terminal of the circuit board through the electrical component, and connecting the lower terminal portion of the bus bar terminal to the load side, It can support various circuit specifications.

  According to the fifth aspect of the present invention, the power distribution unit and the connection block portion can be easily and securely connected in a space-saving manner by attaching the fuse to the unit accommodating portion of the block main body.

  According to the sixth aspect of the present invention, it is possible to reliably supply power in a space-saving manner from the connection block portion side to the power distribution unit side via the bus bar.

  1 to 7 show an embodiment of a power distribution structure for an electrical junction box according to the present invention.

  As shown in FIGS. 1 to 2 (FIG. 2 is shown opposite to FIG. 1), the power distribution structure includes an insulating resin block main body 1 (FIG. 1) and a block main body 1 inserted from below. The conductive metal bus bar 2 to be attached, the power distribution unit 3 to be inserted into the block body 1 from below without using the existing case (FIG. 11B), and the lower side of the power distribution unit 3 The connector block main body 4 (FIG. 2) made of an insulating resin to be attached to the lower portion of the block main body 1 is provided.

  The block main body 1 (FIG. 1) has a unit housing portion 5 in the first half for housing the power distribution unit 3 and a fuse block main body (connection block body) 6 in the second half for mounting a plurality of fuses. doing. The connection block section main body 6 has a fuse mounting section 46 at the upper part. The fuse mounting section 46 is mounted with a fuse, and the connection block section main body 6 accommodates a fuse connection terminal with a wire in the connection block section main body 6. It becomes. The connection block portion (substitute with reference numeral 6) corresponds to the existing connection block (FIG. 9), and the power distribution unit 3 and the connection block portion 6 are integrated by the block body 1.

  A fuse mounting portion 7 is also formed on the upper portion of the unit housing portion 5. A fusible link mounting portion 8 is integrally formed on one end side of the first half. The block body 1 has a lower opening 9 (FIG. 4) on the lower end side, and the lower opening 9 communicates with each internal space of the unit housing portion 5 and the connection block portion body 6.

  The unit housing portion 5 has at least a vertical front wall portion 40a and left and right wall portions 40b and 40c, and the connection block portion main body 6 has at least a vertical rear wall portion 41a and left and right wall portions 41b and 41c. The rear side of the unit accommodating portion 5 and the front side of the connection block main body 6 are integrated and continued.

  On the inner surface side of the block main body 1, a flexible engaging claw (not shown) that engages with a locking hole (locking means) 10 of the bus bar 2 is provided. An engagement hole (locking means) 12 for engaging the locking projection (locking means) 11 on the connector block 4 side is provided on the lower end side of the unit housing portion 5.

  A pair of rails (guides) that engage with a pair of guide grooves (guide means) 14 in the vertical direction on the inner wall surface side of the insulating resin frame 13 (FIG. 3) are provided on the outer wall surface of the block body 1. Means) 15 and a flexible locking arm (locking means) 17 that engages with an engaging projection (locking means) 16 between the guide grooves 15 are provided.

  A block assembly (also referred to as a battery block assembly) 1 ′ shown in FIG. 3 is configured by mounting the bus bar 2 and the power distribution unit 3 on the block body 1. In FIG. 3, the block assembly 1 ′ is inserted from below into the block assembly housing part 19 in the latter half of the frame 31 in a state where the block assembly 1 ′ is inverted. Another block assembly (alternator block assembly) 21 to be described later (FIG. 7) is inserted into the housing portion 18 in the first half of the frame 31.

  The frame 31 is provided on the front and rear frame-like vertical outer walls 49 and 50, the vertical partition 20 provided between the front and rear outer walls 49, the accommodation spaces 18 and 19 before and after the partition 20, and the outer wall 50. The bracket 51 is provided at least and has openings in the upper and lower parts, and the receiving spaces 18 and 19 penetrate vertically. The hanging plate 52 of the front wall 49 of the frame 31 forms a harness outlet (not shown) with the slot of the lower cover.

  A partition wall 20 is provided at the center of the frame 31. The partition wall 20 partitions both block assemblies 1 ′ and 21. The gist of the present invention is that the power distribution unit 3, the connection block unit 6, Is to accommodate the block assembly 1 ′ in which the two are integrated in a space-saving manner without using the partition (FIG. 9) in the accommodation space 19 in the latter half of the frame 31.

  As shown in FIG. 1 and FIG. 2, the bus bar 2 has a narrow connection that connects the front and rear plate portions 22 and 23 that are bent in a substantially U-shape and face each other in parallel, and the plate portions 22 and 23. The plate 24, a plurality of pin terminals 25 and 25 'for connecting fuses that are formed to protrude in parallel from the upper ends of the plate portions 22 and 23 in the horizontal direction, and the upper portion on one end side of one short plate portion 22 A tab terminal 26 for connecting a fusible link projecting on the other side, a wide tab terminal 27 for power input projecting on a lower portion on the other end side of the other long plate portion 23, a connecting plate 24 and a long plate And a positioning tab portion projecting from the upper end of the portion 23.

  Each clamping terminal 25 comprises a pair of left and right clamping pieces 25a, and elastically clamps and connects the tab terminals 29a of the fuse 29 (FIG. 5). The bulging portion 23 a outside the long plate portion 23 in FIG. 2 secures the allowance for the engagement claw (not shown) of the block body 1 to the engagement hole 10. The tab terminal 27 is accommodated in a connector housing 55 on the lower side of the connection block portion body 6 of the block body 1.

  As shown in FIG. 4 (bottom view), the bus bar 2 is inserted into the block main body 1 from below along a longitudinal groove 30 having a substantially U-shaped cross section of the block main body 1, and the short plate portion 22 of the bus bar 2 accommodates the unit. The long plate portion 23 is inserted and arranged on the front end side of the connection block portion main body 6. The connecting portion 24 is located on one side of the block body 1, and the downward tab terminal 27 is located in the connector 32 on the other side of the connection block portion body 6. The power from the battery is input to the connector 32.

  As shown in FIGS. 1 and 2, the power distribution unit 3 includes a vertical circuit board 33, a horizontal upper wall 34 and a lower wall 35 fixed above and below the circuit board 33, and upper and lower wall portions 34 and 35. And a plurality of relays 36 that are surface-mounted in parallel with the circuit board 33, and pin terminals for connecting fuses that project upward in an L-shape from the circuit board 33 between the upper wall 34 and the upper surface of the relay 36. Tab terminal (lower terminal) for connecting the connector, which protrudes downward from the left half side (the right half side in FIG. 2) of the circuit board 33 between the upper side terminal 37 and the lower wall 35 and the lower surface of the relay 36. 38) and a small number of long bus bar terminals 39 for through-connection, which are arranged in parallel to the circuit board 33 and through the upper wall 34 and the lower wall 35 so as to face the relay 36 on the right half side of the circuit board 33. It is configured with.

  The sandwiching terminal (upper terminal) 37 has a tab-shaped horizontal portion 37a, followed by a pin portion 37b for connecting a circuit board and a vertical portion 37c, and a pair of sandwiching pieces 37d is formed on the vertical portion 37c. The tab terminal (lower terminal) 38 includes a horizontal portion 38a and a vertical portion 38c, and a pin portion 38b for connecting a circuit board is formed on the horizontal portion 38a. The vertical portions 37c, 38c of the terminals 37, 38 may be inserted into the insertion holes of the upper and lower horizontal wall portions 34, 35, and may be fixed to the wall portions 34, 35 by insert molding.

  The bus bar terminal 39 has an upper fuse connecting pin (upper terminal) 37 'and a lower connector connecting tab terminal 38', which is the front side (rear side in FIG. 2). Opposing to the clamping terminal 37, the tab terminal 38 ′ is positioned in parallel on the same vertical plane as the tab terminal 38 on the left half side. The upper and lower terminals 37 ′ and 38 ′ may be inserted into the insertion holes of the upper and lower horizontal wall portions 34 and 35, and may be fixed to the upper and lower wall portions 34 and 35 by insert molding. In the specification, the front / rear and left / right directions are for convenience of explanation.

  The circuit board 33 has a printed circuit (not shown) having a required shape on the front side of the insulating substrate 33a, and has a metal core circuit (not shown) in the middle of the insulating substrate 33a in the thickness direction. The circuit form can be set as appropriate. The tab-shaped or pin-shaped terminal 36a of the relay 36 and the pin portions 37b, 38b on the base end side of the upper and lower terminals 37, 38 are soldered to these circuits through the through holes of the insulating substrate 33a. The relay 36 is, for example, a vehicle traveling system of about 20A. In addition to the relay 36, a resistor or the like can be mounted on the circuit board 33 as an electric / electronic component. By changing the type of the circuit board 33, it is possible to easily cope with the grade of the vehicle.

  The connector block body 4 (FIG. 2) includes a horizontal bottom wall 42, a flange wall 43 that protrudes upward at the front and rear ends of the bottom wall 42, and a connector housing 44 that integrally protrudes downward from the bottom wall 42. The bottom wall 42 is provided with a slit hole 45 into which the lower tab terminals 38, 38 'of the power distribution unit 3 are inserted. The slit hole 45 communicates with the connector fitting chamber in the connector housing 44, and the wall 43 Is provided with a locking projection 11 that engages with the engagement hole 12 of the block body 1 (FIG. 1), and the lower wall 35 of the power distribution unit 3 is spaced from the bottom wall 42 between the front and rear wall 43. (See FIG. 5). The tab terminals 38, 38 'on the lower side of the power distribution unit 3 and the connector block body 4 constitute a connector block 4' (FIG. 1).

  As shown in FIG. 4, in a state where the bus bar 2 and the power distribution unit 3 are inserted into the block main body 1, the five holding terminals 25 of the short plate portion 22 of the bus bar 2 of FIG. The fuse mounting portion 7 on the upper side of the power supply unit 3 faces the five holding terminals 37 on the left half side of the first row (front side) of the power distribution unit 3 and holds each bus bar 2 via the blade-type fuse 29 as shown in FIG. The terminal 25 and each clamping terminal 37 of the power distribution unit 3 are connected to each other. In FIG. 4, reference numeral 3 is a power distribution unit, 36 is a relay, 33 is a circuit board, 38 and 38 'are downward tab terminals, and 36a and 38b are circuit connection portions of the respective terminals.

  FIG. 5 illustrates the connection state of the bus bar 2 and the power distribution unit 3 in an illustrative manner. Each of the clamping terminals 25 of the short plate portion 22 of the bus bar 2 and each of the upward clamping terminals 37 on the front side of the power distribution unit 3 are shown in FIG. The fuses 29 are connected to each other. The fuse 29 has a soluble portion (not shown) inside the rectangular insulating resin portion 29b, and has a pair of front and rear tab terminals 29a following the soluble portion.

  The downward tab terminal 38 of the power distribution unit 3 protrudes into the connector housing 44 of the connector block body 4 to constitute a connector block 4 ′ including a connector (represented by reference numeral 44). The circuit board 33 is located along the inner surface of the front wall 43 of the connector block body 4. The upper holding terminal 37 ′ of the long bus bar terminal 39 of the power distribution unit 3 in FIG. 2 is connected to the opposing holding terminal 37 of the power distribution unit 3 via the fuse 29, and the tab terminal 38 ′ on the lower side of the bus bar terminal 39. Is located in the connector block 4.

  The assembled state of FIG. 5 is actually as shown in FIG. That is, in a state where the power distribution unit 3 and the bus bar 2 are accommodated in the block main body 1, each fuse 29 is attached to the fuse attachment portion 7 on the upper side of the unit accommodating portion 5 of the block main body 1. The unit 6 and the power distribution unit 3 are connected, and the battery power is supplied to the connection block unit 6 and the power distribution unit 3 via the bus bar 2.

  The long plate portion 23 of the bus bar 2 is located on the connection block portion main body 6 side, and has an electric wire on the lower side of the fuse attachment portion 46 via a fuse (not shown) of the fuse attachment portion 46 on the upper side of the connection block portion main body 6. A terminal (not shown) is connected to the holding terminal 25 ′ of the long plate portion 23, and power is supplied to each load of the vehicle with an electric wire (circuit). Power is also supplied from the connector block 4 to each load of the vehicle. As shown in FIG. 4, an accommodation chamber 46 a for a terminal with a wire is formed below the fuse mounting portion 46 of the connection block main body 6. It is also possible to use a bus bar (a circuit not shown) instead of the terminal with an electric wire. As shown in FIG. 6, the terminal with electric wire is locked by a flexible locking lance 47 in the accommodation chamber 46a.

  FIG. 7 shows a state in which the block assembly 1 ′ of FIG. 6 is assembled in the frame 31 of FIG. 3 by using another form. Although the shapes of the block assembly 1 ′ and the frame 31 are slightly different from those in the above embodiment, the basic structure is the same. Therefore, the same components as those in the above embodiment are denoted by the same reference numerals and description thereof is omitted. . The frame 31 in FIG. 7 corresponds to the external shape of the existing frame (FIG. 9).

  The block assembly 1 ′ is accommodated in the accommodation chamber 19 in the latter half of the frame 31 and is fixed by the guide means 15 and the locking means 17. Since the second half unit accommodating portion 5 and the first half connecting block portion main body 6 of the block assembly 1 ′ are integrated, there is no existing partition wall (FIG. 9) in the second half accommodating chamber 19. Thereby, the frame 31 is made compact.

  The block assembly 1 ′ is a battery block assembly, and an alternator block assembly as another block assembly 21 is accommodated in the accommodation chamber 18 in the first half of the frame 31. The front and rear storage chambers 18 and 19 are partitioned by a partition wall 20 in order to enhance the assemblability of the other block assemblies 21, but by removing the partition wall (FIG. 9) of the latter storage chamber 19, the frame 31 The whole, that is, the electrical connection box 48 is made compact. When the other block assembly 21 is not used, a frame without the partition wall 20 can be configured only by the latter storage chamber 19.

  Each cover (not shown) is attached to the top and bottom of the frame 31 to form an electrical connection box 48. The electrical connection box 48 is fixed to the vehicle body or the like by a bracket 51 (FIG. 3) of the frame 31. In FIG. 7, reference numeral 53 denotes a fusible link, 54 denotes a relay, 29 denotes a fuse on the power distribution unit 3 side, and 29 ′ denotes a fuse on the connection block unit 6 side.

  In the above embodiment, the bus bar 2 and the power distribution unit 3 are connected by the fuse 29, but a joint terminal, a short terminal, a fusible link or the like (not shown) is used instead of the fuse 29 as an electrical component. Is also possible. Use of the fuse 29 prevents overcurrent between the bus bar 2, that is, the connection block unit 6 and the power distribution unit 3.

  In the above embodiment, the fuse 29 ′ is connected to the terminal 25 ′ of the long plate portion 23 of the bus bar 2 on the connection block 6 side. However, instead of the fuse 29 ′ as an electrical component or a relay together with the fuse 29 ′. Etc. (not shown) can also be connected. In this case, a relay mounting portion (not shown) is formed on the upper portion of the connection block portion main body 6, and a relay connection tab terminal or the like is provided on the plate portion 23 of the bus bar 2.

  In the above embodiment, the power distribution unit 3 and the connection block unit 6 are arranged close to each other in parallel. However, depending on the arrangement of other connection blocks 21 in the frame 31, for example, the power distribution unit 3 and the connection block unit 6 are connected. It is also possible to arrange the block portions 6 adjacent to each other in a substantially L shape. In this case, the bus bar 2 is bent and formed in a substantially L shape instead of a substantially U shape (substantially U shape).

  In addition to the power distribution structure of the electrical connection box, the configuration of the above embodiment is also effective as a unit assembly structure or a block assembly structure of the electrical connection box, or the electrical connection box itself.

It is a disassembled perspective view which shows the principal part of one Embodiment of the power distribution structure of the electrical junction box which concerns on this invention. FIG. 2 is an exploded perspective view of the power distribution structure as seen from the front and back opposite direction. It is a disassembled perspective view which shows the state which attaches a block assembly to a flame | frame. It is the top view which looked at the block assembly from the lower surface side. It is a principal part perspective view which shows the connection state of a power distribution unit and a bus bar. It is a principal part perspective view which shows the block assembly which accommodated the power distribution unit and the bus-bar in the flame | frame. It is a top view which shows the other form of the state which accommodated the block assembly in the flame | frame. It is a longitudinal cross-sectional view which shows one form (block assembly structure) of the conventional electrical junction box. It is a bottom view perspective view which shows the other form (power supply distribution structure) of the existing electrical junction box. It is a top view top view which similarly shows a power distribution structure. (A) is a perspective view which shows the existing power distribution unit, (b) is a perspective view which similarly shows an internal structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Block main body 2 Bus bar 3 Power distribution unit 4 Connector block main body 5 Unit accommodating part 6 Connection block main part 22, 23 Plate part 25, 25 'Holding terminal (terminal for electrical component connection)
27 Tab terminal (terminal for power input)
29 Fuses (electrical parts)
29 'fuse (electrical part)
31 Frame 33 Circuit board 34, 35 Upper and lower walls 36 Relay (Electrical and electronic parts)
37 Nipping terminal (upper terminal)
38 Tab terminal (lower terminal)
39 Busbar terminal 48 Electrical junction box

Claims (6)

A power distribution unit in which electrical and electronic components are mounted on a vertically placed circuit board, and terminals are provided to project from the circuit board up and down;
A block main body configured to be integrally formed adjacent to and integrally formed with a unit accommodating portion for accommodating the power distribution unit and a connection block main body for mounting an electrical component;
A plate part mounted on the block main body and located on the unit housing part side and a plate part located on the connection block part main body side are integrally provided, and terminals for connecting electrical components project to each plate part. A bus bar,
A power distribution structure for an electric junction box, comprising: the terminal on the upper side of the power distribution unit; and an electrical component for connecting the terminal of the plate portion located on the unit housing portion side to each other.   2. The power distribution of the electrical junction box according to claim 1, wherein the terminal on the lower side of the power distribution unit is disposed in a connector block main body, and the connector block main body is attached to a lower portion of the unit housing portion. Construction.   Horizontal wall portions are provided above and below the circuit board, the upper and lower terminals are disposed through the upper and lower wall portions, and the electric and electronic parts are disposed between the upper and lower wall portions. The power distribution structure for an electrical junction box according to claim 1 or 2.   4. A power distribution structure for an electrical junction box according to claim 3, wherein a vertical bus bar terminal for through connection is disposed through the upper and lower walls.   The power distribution structure for an electrical junction box according to any one of claims 1 to 4, wherein the electrical component is a fuse.   The power distribution structure for an electrical connection box according to any one of claims 1 to 5, wherein a terminal for power input is provided on a plate portion located on the side of the connection block main body.

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