JP4225940B2 - Electrical junction box - Google Patents

Description

  The present invention mainly relates to an electrical junction box mounted on an automobile.

Conventionally, since an electric junction box mounted on an automobile is sometimes installed in an engine room or the like, a short circuit has been taken to prevent a circuit board or a bus bar from being short-circuited due to water intrusion due to cleaning (Patent Document 1). ).
In this device, an attachment portion 3c for connecting an external connector is integrally provided on the upper surface of a casing 3 for housing a circuit board. The attachment portion 3c is provided with a terminal accommodation hole 3d penetrating vertically, and a connection terminal (bus bar) 13 for connecting a terminal included in the external connector and the circuit board is accommodated therein. For this reason, there is a risk that the moisture that has entered through the terminal accommodating hole 3d may travel through the bus bar and soak the circuit board 5 inside the electrical junction box.
Therefore, another part 11 is fitted in a liquid-tight manner on the outer periphery of the bus bar 13 on the path from the mounting portion 3c to the circuit board 5, thereby protecting the circuit board 5 by changing the path of moisture passing through the bus bar 13. I was trying to do it.
JP 2003-348732 A

According to the above structure, the circuit board can be protected by changing the path of moisture passing through the bus bar. For example, as shown in FIG. 11, if the bus bar 15 is bent in a crank shape, the bent circuit Raindrops easily accumulate in the bent portion 16. In particular, when a plurality of bus bars 15 are arranged side by side, the adjacent bus bars may be short-circuited at the bent portion 16.
The present invention has been completed based on the above-described circumstances, and an object thereof is to prevent a short circuit of a bus bar.

  As a means for achieving the above object, the invention of claim 1 includes a fuse box in which a fuse element is removably accommodated, a circuit housing disposed below the fuse box, and a bottom surface of the fuse box. A plate-like fuse-side connecting portion that is mounted in the provided mounting hole and extends upward in the fuse box, a plate-like connecting plate portion that is connected to the fuse-side connecting portion and is drawn downward from the mounting hole, and the connecting plate portion And a plurality of bus bars having a housing side connection portion inserted into an attachment hole provided in the circuit housing, and the two attachment holes are disposed apart from each other in the plate thickness direction of the fuse side connection portion. And the both connecting portions of the bus bar are clamped via the connecting plate portion in accordance with the disposition of the mounting holes. In the electrical junction box which is connected to Jo, the plate surface of the connecting plate portion has a characterized in that is along the vertical direction.

  According to a second aspect of the present invention, the fuse-side connecting portion, the connecting plate portion, and the housing-side connecting portion are integrally formed by bending a plate material.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the connecting plate portion has a laterally extending portion extending in the direction in which the bus bars are arranged, and the fuse side connection portion and the housing side connection portion Are connected in a state of being displaced with respect to the arrangement direction of the bus bars.

  According to a fourth aspect of the present invention, in the third aspect, the width dimension of the housing side connection portion is narrower than the width dimension of the fuse side connection portion. The housing-side connection portions are arranged side by side so that the overall width dimension of the housing-side connection portion is narrower than the overall width dimension of the fuse-side connection portion.

  The invention according to claim 5 is the one according to any one of claims 1 to 4, wherein the connecting plate portion is formed by bending one side edge portion along the extending direction of the fuse side connection portion, In the hole wall of each mounting hole on the fuse box side, an accommodation groove for individually accommodating the connection plate portion is provided, and in the state where the bus bar is mounted on the fuse box, each connection plate portion has an accommodation groove. It is characterized by being separated by a groove wall.

<Invention of Claim 1>
According to the invention of claim 1, the connecting plate portion has a plate shape along the vertical direction. Therefore, although the shape of the bus bar is bent in a crank shape, the water transmitted through the bus bar is drained without staying at the connecting plate portion (the cranking portion). Therefore, a short circuit between adjacent bus bars due to raindrop accumulation at the periphery of the connecting plate portion is prevented.

<Invention of Claim 2>
According to the invention of claim 2, since the bus bar is integrally formed, the cost can be reduced.

<Invention of Claim 3>
According to the invention of claim 3, since it is possible to arbitrarily set the arrangement of the fuse side connection portion and the housing side connection portion with respect to the arrangement direction of the bus bars, the degree of freedom of arrangement increases.

<Invention of Claim 4>
According to the invention of claim 4, since the overall width dimension of the housing side connection portion can be made smaller than the entire width dimension of the fuse side connection portion, the circuit housing can be miniaturized.

<Invention of Claim 5>
According to the invention of claim 5, since each connecting plate portion is separated by the groove wall of each receiving groove in the mounted state, it is more effective as a measure for preventing a short circuit at the same portion.

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS.
1 shown in FIG. 1 is an electric junction box used for an automobile, and is interposed between a power source such as a battery and an electrical load (electrical components such as a lamp and an audio), and receives electric power supplied from the power source. In addition to distributing and supplying to each electrical component, control for switching the power supply is performed. The electrical connection box 20 includes a connection box main body 21, a fuse box 70, and an upper connector (corresponding to the circuit housing of the present invention) that accommodates a circuit component 31 in which an electronic component 32 such as a switching element is mounted on a circuit board 33. ) 90 as a main body, for example, arranged vertically in the engine room. In the following description, the vertical direction is based on the assembly, that is, the direction of FIG. 3, and the horizontal direction is based on the direction of FIG.

The junction box body 21 will be described with reference to FIG.
35 shown in the figure is a frame, which is made of an insulating material such as a synthetic resin and has a frame shape surrounding the outer periphery of the circuit component 31, and receives the circuit component 31 from above. Yes. A heat radiating plate 39 is attached to the opening edge (the lower surface in FIG. 2) on the bottom side of the frame 35.

  The heat dissipating plate 39 is metallic and is formed to have a size capable of covering the opening on the bottom side of the frame 35, and closes the entire opening on the bottom side when mounted. Further, attachment portions 35 </ b> A and 39 </ b> A are formed on the heat radiating plate 39 and the frame body 35 so as to project outward from the circuit configuration body 31. These attachment portions 35A and 39A are provided with screw holes. As shown in FIG. 4, the attachment portions 35A and 39A are overlapped with each other and screwed to the wall of the engine room in an electrical connection box. The whole 20 is attached.

  Further, as shown in FIG. 3, a board bus bar 40 is disposed between the circuit board 33 and the heat radiating plate 39 and constitutes a conductive path for distributing power. The board bus bar 40 is made of a metal plate, and an insulating adhesive is provided between the board bus bar 40 and the circuit board 33 and between the board bus bar 40 and the heat radiating plate 39. It is applied over the entire area. Thus, both members are bonded and fixed and electrically insulated. In addition, the electrical connection between the board bus bar 40 and the conductive path on the circuit board 33 is, for example, a jumper wire or a melted solder between a through hole provided in the circuit board 33 and the board bus bar 41. It is to be taken by filling.

  As shown in FIG. 2, a plurality of one end portions of the board bus bar 40 are drawn out from the upper edge of the circuit board 33 in the width direction of the circuit board 33 (left-right direction in the figure). Among these, the board width of the board bus bar 41 in the range slightly to the right of the center from the left corner of the circuit board 33 is set to be slightly thicker than the board width of the board bus bar 46 arranged on the right corner side. The board bus bar 41 is bent in an L shape, and the tip portion thereof is directed to the right back side in FIG. 2 (the side on which a fuse box 70 described later is mounted). The front end portion of the board bus bar 41 is a fuse terminal connection portion 42, and a pair of sandwiching pieces 43 facing each other are formed. A receiving groove 44 that can receive the fuse terminal T is provided between the sandwiching pieces 43, and when the fuse terminal T is inserted therein, both the sandwiching pieces 43 are elastically provided with respect to the fuse terminal T. ing.

  The board bus bar 46 is bent in a U-shape, and its front end portion faces the front side in the figure. The front end portion of the board bus bar 46 is a tab terminal 48, and is inserted into the second hood portion 96 through a second receiving hole 96A of the upper connector 90 described later (see FIG. 5). ). The bent portion of the board bus bar 46 in a U-shape is referred to as a folded portion 47.

On the other hand, a lower connector 51 is attached to the lower edge side of the frame body 35. The lower connector 51 is made of synthetic resin, and in the present embodiment, three are provided side by side in the width direction. The lower connector 51 includes a cylindrical hood portion 51A for fitting the mating connector.
Further, as shown in FIG. 2, the left and right edges of the frame 35 are provided with mounting inner walls 37 that rise upward in the figure, and lock pieces for the cover 61 described below on the outer surface side of each of the inner walls 37. A pair of 37A is provided.

  The cover 61 is made of a synthetic resin and is formed to have a size capable of covering the front of the circuit board 33, and a tab support piece 62 is formed at a corner portion on the right rear side in FIG. When the cover 61 is attached to the frame body 35, the tab support piece 62 enters the folded portion 47 together with the tab support step portion 97 formed on the upper connector 90 and is fitted into the same portion without a gap. It has become.

  Further, the lower edge portion 63 of the cover 61 bulges in the opposite direction of the circuit board 33 (upward in FIG. 2) over its entire width. As shown in FIG. 3, a terminal fitting 53 bent in an L shape is soldered and fixed to the lower edge side of the circuit board 33, and the tab 53 </ b> A of the terminal fitting 53 extends through the back wall of the lower connector 51. It penetrates and protrudes into the hood 51A. In the present embodiment, the height position of the cover 61 is set with reference to the electronic component 32 such as a relay, but the height of the terminal fitting 53 joined to the lower connector 51 is set to the height of the other electronic components 32. Since it is higher than the above, the lower edge 63 of the cover 61 is bulged to avoid interference between the cover 61 and the terminal fitting 53 at that portion.

  Outer walls 65 are provided on the side edges of the cover 61 at positions facing the inner wall 37 of the frame body 35 so as to protrude toward the frame body 35. The outer walls 65 are engaged with the lock pieces 37A. A lock receiving portion 65A that can be stopped is provided.

When the cover 61 is fitted to the frame 35 so that the outer wall 65 is directed to the inner wall 37, the upper edge portion of the cover 61 is bent and raised for each board bus bar 41 as shown in FIG. The lower edge portion of the cover 61 abuts against the back surface 51B of the lower connector 51 while striking a portion (hereinafter referred to as a bent portion 41A). In the mounted state, the lock piece 37 </ b> A is engaged with the lock receiving portion 65 </ b> A to hold the cover 61 in a state of being prevented from being detached from the frame body 35.
In this state, the fuse terminal connection portion 42 is exposed from the connection box main body 21 and is in an attitude facing upward in FIG.

  In addition, seats 64 for screwing the cover 61 to the frame body 35 are provided at the left and right ends of the upper edge of the cover 61 (the side edge on the back side in FIG. 2). Of the outer wall around the seat portion 64, the lower edge portion is cut off, and a step 65 </ b> B is provided between the outer wall 65 and the other outer wall 65. The height of the step 65B is substantially the same as the thickness of the mounting edge 85 formed in the fuse box 70 described below, and the mounting edge 85 is fitted to the step 65B.

  The fuse box 70 is made of a synthetic resin and has a horizontally long block shape extending along the width direction of the circuit board 33. In the fuse box 70, the first storage portion 71 is located in the range slightly to the right of the center from the left corner in FIG. 2, and the second storage portion 81 in which the right half is stored the folded portion 47 of the board bus bar 46. It is said that. As will be described in detail later, the first accommodating portion 71 opens upward in FIG. 3, while the second accommodating portion 81 opens in the opposite direction. Further, the lower edge portions of the left and right ends of the fuse box 70 project toward the cover 61, and an attachment edge 85 is formed. The shape of the mounting edge 85 is such that it is just fitted into the step portion 65B of the cover 61.

  The second accommodating portion 81 collectively accommodates the folded portion 47 of the board bus bar 46 from the opening side. Support grooves 82 are provided on the three inner wall surfaces constituting the second accommodating portion 81 at positions facing each of the substrate bus bars 46. The groove width of the support groove 82 is formed to be substantially the same as the width dimension of the board bus bar 46, and the folded portion 47 of each board bus bar 46 is fitted in each support groove 82 in the mounted state. ing.

  A pressing restricting wall 79 extending upward in the figure is formed on one side surface (upper surface in FIG. 2) of the first accommodating portion 71, and a cover 61 is formed on the right edge of the first accommodating portion 71. An elastic lock arm 78 extending in a cantilevered manner toward the side is formed. A claw portion 78A that protrudes inward is provided at the tip of the elastic lock arm 78.

  By the way, as shown in FIGS. 7 and 8, the first accommodating portion 71 opens upward in the drawing and has a plurality of partition walls 71 </ b> A formed along the width direction, and the inside is partitioned into a plurality of fuse chambers 72. ing. As shown in FIG. 3, a pair of terminal insertion holes 76 and 77 are provided in the R direction in the figure on the lower surface 75 of each fuse chamber 72, and the partition wall 73 is located between the terminal insertion holes 76 and 77. And retaining pieces 74 are provided on both sides of the partition wall 73. The retaining piece 74 is cantilevered upward in the figure, and a lock claw 74A is provided at the tip.

  Among the terminal insertion holes 76 and 77, the fuse terminal connection part 42 of the board bus bar 41 is inserted into the terminal insertion hole 76 on the right side in FIG. 3. The fuse terminal connection portion 42 is provided with a lock hole 45 that can be locked to the lock claw 74A of the retaining piece 74. When the fuse terminal connection portion 42 is inserted to the normal insertion position shown in FIG. The lock claw 74A is engaged with the lock hole 45 to prevent the fuse terminal connection portion 42 from being pulled out. On the other hand, a fuse terminal connecting portion 112 of a connector bus bar 110 described later is inserted into the left terminal insertion hole 77. The fuse terminal connection portion 111 of the connector bus bar 110 is also provided with a lock hole. When the fuse terminal connection portion 111 is inserted to the normal insertion position, the lock claw 74A is engaged with the lock hole and connected to the fuse terminal. The portion 111 is prevented from being removed.

On the other hand, in each fuse chamber 72, a fuse H having a pair of fuse terminals T is detachably accommodated from above. In the mounted state, the fuse terminal T on one side is connected to the connector bus bar 110, and the fuse terminal T on the other side is connected to the board bus bar 41. Thus, when an overcurrent flows through the bus bars 41 and 110, the fuse H is thermally melted to protect the electrical load connected to the circuit component 31 or the upper connector 90.
Further, as shown in FIG. 3, in the attached state, the left half of the fuse box 70 protrudes to the side of the junction box body 21, and the upper connector 90 is located on the wall 61A of the cover 61 below the protruding portion. Are assembled from below in the figure.

  The upper connector 90 has a horizontally long shape extending along the width direction of the fuse box 70, and a first hood portion 93 is formed at a position facing the first housing portion 71, and faces the second housing portion 81. A second hood portion 96 is formed at the position (see FIG. 2). In the present embodiment, the second hood portion 96 is divided into two hoods 96A and 96B. Both the hood portions 93 and 96 are cylindrical and open in the same direction as the hood portion 51A of the lower connector 51 so that the mating connector (not shown) is fitted inside. Yes.

  A locking groove 98 is recessed in the upper connector 90 between the first hood portion 93 and the second hood portion 96 and at a position facing the elastic lock arm 78 of the fuse box 70. The locking groove 98 extends in the front-rear direction along the extending direction of the elastic lock arm 78, and the elastic lock arm 78 is received in the groove from the back side of FIG. ing. Further, a lock projection 99 is formed on the bottom surface. When the upper connector 90 is attached to the fuse box 70, the claw 78A of the elastic lock arm 78 is locked to the lock projection 99, so that the upper connector 90 is prevented from being removed from the fuse box 70. It comes to hold.

  FIG. 5 is a perspective view of the upper connector 90 as viewed from the back, that is, from the side facing the cover 61. 91 shown in the figure is a facing portion, and faces the lower surface 75 of the first accommodating portion 71. A first receiving hole 91 </ b> A that is continuous with the first hood portion 93 is provided in the center portion of the facing portion 91. On the other hand, a second receiving hole 96 </ b> A is provided in the upper wall of the second hood portion 96 provided on the left side of the facing portion 91.

  Further, a guide wall 92 that rises upward from the one side edge of the facing portion 91 and continues to the side edge portion of the second hood portion 96 is provided. The guide wall 92 functions to guide the assembly operation of the upper connector 90 with respect to the fuse box 70 by slidingly contacting the side surface of the fuse box 70 in the course of the mounting operation. Further, in the mounted state, the end surface 92A of the guide wall 92 abuts against the push-in restricting wall 79, and further push-in operation is restricted.

Next, the connector bus bar 110 for electrically connecting the fuse box 70 and the upper connector 90 will be described with reference to FIG.
The connector bus bar 110 is formed by bending a metal piece having a predetermined development shape. In the present embodiment, six bus bars 110 are provided along the width direction of the fuse box 70. The connector bus bar 110 includes a fuse terminal connecting portion (corresponding to the fuse side connecting portion of the present invention) 111 and a tab (corresponding to the housing side connecting portion of the present invention) 116. Among these, the fuse terminal connecting portion 111 is inserted into the fuse chamber 72 through the terminal insertion hole 77, and the tab 116 is inserted into the first hood portion 93 through the first receiving hole 91A. The terminal insertion hole 77 and the first receiving hole 91A correspond to the mounting holes of the present invention, and these holes are arranged apart from each other in the R direction shown in FIG. Yes.

  The fuse terminal connecting portion 111 has a plate shape extending from the left back to the front in FIG. 6 (FIG. 6), and is provided with a pair of clamping pieces 112 at the tip. Between the sandwiching pieces 112, a receiving groove 113 capable of receiving the fuse terminal T is formed in the same manner as the fuse terminal connecting portion 42 of the board bus bar 41 described above, and the fuse terminal T is inserted therein. Both sandwiching pieces 112 are elastically provided to the fuse terminal T.

  A side edge portion 111A located on the inner side in the arrangement direction of the connector bus bars 110, which is the base end portion (the end portion on the back side in the figure) of the fuse terminal connection portion 111, is a bent edge. The connecting plate portion 121 is formed upright. The plate surface of the connecting plate portion 121 is oriented along the direction in which the fuse terminal connecting portion 111 extends, and in the assembled state, as shown in FIG. In this way, the drainage of the connector bus bar 110 is enhanced by directing the plate surface of the connecting plate portion 121 in the vertical direction. This is because raindrops or the like may enter the fuse chamber 72 when the fuse H is replaced. Such raindrops travel along the bus bars 41 and 110. However, if the plate surface of the connecting plate portion 121 is a horizontal plane in the left-right direction in the assembled state, the raindrops easily accumulate there. However, since the plate surface of the connecting plate 121 is directed in the vertical direction, raindrops are not drained to the connecting plate portion 121 but are drained downward. In the present embodiment, the angle (bending angle) between the connecting plate portion 121 and the fuse terminal connecting portion 111 is approximately 90 degrees.

  Further, as shown in FIG. 7, the fuse terminal connection portion 111 is inserted into the fuse chamber 72 through the terminal insertion hole 77, and the connecting plate portion 121 can be individually accommodated in the hole wall of the terminal insertion hole 77. A housing groove 77A is provided. As a result, when each connector bus bar 110 is mounted on the fuse box 70 as shown in FIG. 8, the adjacent connecting plate portions 121, and hence the fuse terminal connecting portions 111, are connected by the terminal insertion holes 77 or the wall surfaces of the housing grooves 77A. It is supposed to be separated.

  On the other hand, the tab 116 has a plate shape extending in the same direction as the fuse terminal connecting portion 111. The total width (B dimension in FIG. 6) of these tabs 116 is narrower than the full width (A dimension in FIG. 6) on the fuse terminal connecting portion 111 side. Thus, in order to connect the tab 116 and the fuse terminal connecting portion 111 while changing the width dimension, the lateral width of the tab 116 is set to be narrower than the lateral width of the fuse terminal connecting portion 111, and the tab 116 and the connecting plate portion 121. Is different between the four bus bars 110A and 110B in the center and the bus bar 110C located outside.

  More specifically, in the central four bus bars 110 </ b> A and 110 </ b> B, the tip end portion of the tab 116 is directly connected to the connecting plate portion 121. On the other hand, in the outer bus bar 110C, a laterally extending portion 125 extending from the front end portion of the connecting plate portion 121 toward the inner side in the arrangement direction of the connector bus bars 110 is provided, and the front end of the tab 116 is provided there. It is connected.

Further, in the present embodiment, the base end side of the outer bus bar 110C is extended to the back side of the figure (extension portion 111B), and the connecting plate portion 121 is formed there. By providing the extension 111B in this way, the connection plate 121 provided on the outer bus bar 110C and the connection plate 121 provided on the other bus bars 110A and 110B do not overlap in the extending direction of the bus bar 110. It is as.
The connector bus bar 110 is assembled by pressing the fuse terminal connection portion 111 into the terminal insertion hole 77 of the fuse box 70 slightly before the upper connector 90 is attached to the fuse box 70. It has become so.

In the present embodiment, drain slopes 67 and 94 are formed at the upper edge of the cover 61 and the upper connector 90.
The cover-side drain slope surface 67 is in a position facing the first housing portion 71, and the lateral width is substantially equal to the lateral width of the first housing portion 71. The drain slope portion 67 starts from the tip of the frame 35 (the P portion shown in FIG. 3 where the board bus bar 41 is drawn from the inside of the frame 35 to the outside of the frame 35). The upper connector 90 is inclined downward with an inclination of about 45 degrees, and the end thereof reaches the wall surface 61 A of the cover 61.

  On the other hand, the connector-side drain slope portion 94 is formed over the entire width of the upper portion of the first hood portion 93. As shown in FIG. 4, the sloped portion 94 for drainage is inclined downward with a slope of about 45 degrees toward the cover 61, and a step 94 </ b> A continuous to the lower edge of the connecting plate portion 121 is provided at the start end portion thereof. The terminal end reaches the back surface 90 </ b> A of the upper connector 90.

  Both the slopes 67 and 94 oppose each other in the mounted state and constitute a substantially V-shaped drainage groove. Therefore, the raindrops transmitted through the board bus bar 41 and the connector bus bar 110 are drained downward through the drain slopes 67 and 94.

The effect of this embodiment is demonstrated.
Since the replacement work of the fuse H is performed in a state where the bonnet is opened, for example, if the replacement work is performed during rain, raindrops may enter the fuse chamber 72. Raindrops that have entered the fuse chamber 72 temporarily accumulate on the bottom surface of the fuse chamber 72, but then the raindrops travel along the fuse terminal connection portions 42, 111 of the bus bars 41, 110 and enter the terminal insertion holes 76, 77 over time. It exudes.

  The oozing raindrops eventually reach the connecting plate portion 121, but the connecting plate portion 121 has its plate surface directed in the vertical direction, so that the raindrops further propagate downward along the plate surface. Thereafter, the raindrops reach the starting end of the drain slope portion 94, and thereafter, the raindrops are drained along the slope of the drain slope portion 94 outside the routing path of the connector bus bar 110.

  By the way, since the terminal insertion hole 77 of the fuse box 70 and the first receiving hole 91A of the upper connector 90 are in a positional relationship separated in the left-right direction in FIG. 4, the connector bus bar 110 is formed in a crank shape as in this embodiment. It must be bent. In this case, the portion connecting the fuse terminal connecting portion 111 and the tab 116, that is, the plate surface of the connecting plate portion 121 is not a vertical surface along the vertical direction, and the horizontal plane along the arrangement direction of the connector bus bars 110 and If it becomes, it will become easy to accumulate raindrops in the part, and there exists a possibility that the connection board part 121 of the adjacent bus-bar 110 may short-circuit. However, if the plate surface of the connecting plate portion 121 is a vertical surface extending in the vertical direction, raindrops are drained without staying on the connecting plate portion 121, so that the short circuit can be prevented.

In the present embodiment, an extension 111B is formed on the outer bus bar 110C, and the connecting plate portion 121 provided on the outer bus bar 110C and the connecting plate portions provided on the other bus bars 110A and 110B. 121 does not overlap with the extending direction of the bus bar 110. With this setting, the connecting plate portion 121 of the bus bar 110B and the tab 116 of the bus bar 110C can be separated.
In addition, when each connector bus bar 110 is attached to the fuse box 70 as shown in FIG. 8, each connecting plate portion 121 is accommodated in the terminal insertion hole 77 or the accommodating groove 77A, and the adjacent connecting plates are separated by the wall surface. The parts 121 are separated from each other. As a result, a short circuit is less likely to occur.

  If it is the said structure, what is necessary is just to set the minimum clearance gap which the adjacent things do not interfere between adjacent connection board parts 121 and by extension, bus bars 110 (it is necessary to make a clearance gap wide in order to prevent a short circuit) Therefore, the upper connector 90 can be downsized by reducing the overall width of the tab 116 as in the present embodiment. Note that raindrops are drained not only through the path of the connector bus bar 111 and the drain slope part 67 but also through the path of the board bus bar 41 and drain slope part 67.

<Embodiment 2>
A second embodiment of the present invention will be described with reference to FIG.
The second embodiment is different from the first embodiment in the shape of the central connector bus bar 131, and the other configuration is the same as that of the first embodiment.
An extension part 133 extending to the back side in the figure is formed at the base end part of the fuse terminal connection part 132 of the connector bus bar 131. A connecting plate portion 135 is formed along the bus bar arrangement direction at the inner edge of the extended portion 133, and a tab 136 is connected to the upper edge thereof.
As described above, the plate surface of the connecting plate portion 135 of the central bus bar 131 is not a vertical surface along the vertical direction during assembly, but is a horizontal surface along the width direction of the bus bar. This is because the area of the portion 135 is small, and it is difficult for raindrops to accumulate there.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.

  (1) In the present embodiment, the plate surface of the connecting plate portion 121 of the connector bus bar 110 is a vertical surface along the vertical direction, but the plate surface of the connecting plate portion of the board bus bar 41 is also vertical along the vertical direction. It may be a surface.

  (2) In the present embodiment, the bending angle of the fuse terminal connecting portion 111 and the connecting plate portion 121 is approximately 90 degrees. However, if the plate surface of the connecting plate portion 121 is directed in the vertical direction, the bending angle is It may be other than 90 degrees.

The perspective view of the electrical-connection box concerning Embodiment 1 of the present invention. Disassembled perspective view of electrical junction box Sectional view of the electrical junction box (shows the state before attaching the upper connector) Sectional view of the electrical junction box showing the top connector attached Perspective view of the upper connector as seen from the back Perspective view of connector bus bar Sectional drawing which shows the state before attaching the bus bar for connectors to a fuse box Sectional view showing the state where the connector bus bar is mounted on the fuse box Perspective view of cover The perspective view of the bus bar for connectors concerning Embodiment 2 of the present invention. Side view of conventional example

Explanation of symbols

20 ... Electric junction box 21 ... Junction box body 70 ... Fuse box 77 ... Terminal insertion hole (mounting hole)
90 ... Upper connector (circuit housing)
91A ... first receiving hole (mounting hole)
110 ... Connector bus bar 121 ... Connecting plate

Claims (5)

A fuse box in which a fuse element is detachably accommodated;
A circuit housing disposed below the fuse box;
A plate-like fuse-side connecting portion that is mounted in a mounting hole provided on the bottom surface of the fuse box and extends upward in the fuse box, and a plate-like connecting plate that is connected to the fuse-side connecting portion and is drawn downward from the mounting hole. And a plurality of bus bars having a housing-side connection portion inserted into a mounting hole provided in the circuit housing and connected to the connecting plate portion,
The both mounting holes are disposed so as to be separated from each other in the plate thickness direction of the fuse side connection portion, and both connection portions of the bus bar are cranked via the connecting plate portion in accordance with the disposition of the both mounting holes. In an electrical junction box connected in a shape,
The electrical connection box, wherein a plate surface of the connecting plate portion extends in a vertical direction. 2. The electrical connection box according to claim 1, wherein the fuse side connection portion, the connecting plate portion, and the housing side connection portion are integrally formed by bending a plate material. The connecting plate portion has a laterally extending portion extending in the bus bar arrangement direction, and connects the fuse side connection portion and the housing side connection portion in a state of being displaced with respect to the bus bar arrangement direction. The electrical junction box according to claim 1 or 2. In the case where the width dimension of the housing side connection portion is narrower than the width dimension of the fuse side connection portion,
The laterally extending portion includes the housing-side connection portions arranged side by side so that the overall width dimension of the housing-side connection portion is narrower than the overall width dimension of the fuse-side connection portion. 3. The electrical junction box according to 3. The connecting plate portion is formed by bending one side edge portion along the extending direction of the fuse side connecting portion,
In the hole wall of each mounting hole on the fuse box side, an accommodation groove for individually accommodating the connection plate portion is provided, and in the state where the bus bar is mounted on the fuse box, each connection plate portion has an accommodation groove. The electrical junction box according to claim 1, wherein the electrical junction box is separated by a groove wall.

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