JP4993215B2 - Electrical junction box - Google Patents

Description

  The present invention relates to an electrical junction box.

Conventionally, as an example of an electrical connection box that is mounted on a vehicle and executes energization or disconnection of an in-vehicle electrical component such as a lamp or an audio device, one described in Patent Document 1 is known. In this electrical junction box, the connector is mounted with the hood portion into which the mating connector is fitted facing down with respect to the casing that accommodates the circuit component formed by mounting the electronic component on the circuit board. . In this way, if the hood part is attached facing downward, even if water adheres to the casing or the outer peripheral wall of the hood part, it will propagate down, so that the dripping water droplets will enter the hood part. There is very little intrusion.
JP 2006-50814 A

However, in the connector fitting state, the outer peripheral wall of the mating connector and the inner peripheral wall of the hood portion are naturally fitted with no gap, but as shown in FIG. When the water droplet W enters the inside of the hood portion 250 from the opening 251 of the hood portion 250 or spreads along the lower end 255, the water droplet is sucked up by the gap between the connectors Q due to capillary action, and the fitting surface U between the connectors. There is a risk of reaching.
The present invention has been completed based on the above circumstances, and an object thereof is to provide an electrical junction box having excellent waterproof performance.

  The present invention provides a circuit board formed by mounting electronic components on a board, a circuit casing divided by two cover bodies that cover both sides of the circuit board, and a conductive path of the circuit board. A connector having a bus bar connected to the circuit casing and provided with a fitting surface to the mating connector facing down with respect to the circuit casing. An electrical connection box arranged vertically in the vertical direction, and an enclosure wall that double-wraps the mating connector together with the hood portion is provided on the outer peripheral side of the hood portion of the connector to which the mating connector is fitted. In addition, the surrounding wall is characterized in that it extends from the lower end of the mating connector fitted to the hood portion to at least the lower side.

As an embodiment of the present invention, the following configuration is preferable.
-The inner wall of the connector hood or the outer wall of the mating connector that fits into the connector hood is provided with a recess that forms a gap with the mating wall on either side. . If it does in this way, it will become possible to reduce the quantity of the water which cannot be sucked up by the capillary phenomenon between the wall surfaces of both connectors, or is sucked up.

  According to the present invention, the mating connector is surrounded over the entire height by the surrounding wall formed in the connector. If it does in this way, the water droplet adhering to an electrical junction box will flow below along the outer surface of a surrounding wall, and will not adhere to a connector and the other party connector. In this way, the dripping water droplets are not sucked up by the so-called capillary phenomenon in the gap between the inner peripheral wall of the hood part and the outer peripheral wall of the mating connector. Can be provided.

  An embodiment in which the present invention is applied to an electric junction box 10 for a vehicle will be described with reference to FIGS. 1 is an exploded perspective view of the electrical junction box, FIG. 2 is a perspective view of the electrical junction box, FIG. 3 is a view of the back side cover body in FIG. 1 viewed from the direction A, and FIG. 4 is a front side cover in FIG. It is the figure which looked at the body from the B direction.

  As shown in FIG. 1, the electrical junction box 10 includes a circuit board 20 and a circuit casing 30. The circuit board 20 is obtained by mounting an electronic component Z such as a semiconductor relay on a rectangular printed board formed with a conductive path (not shown) by a printed wiring technique. The circuit board 20 is provided with a moisture-proof insulating coating (a liquid resin is applied by spraying or the like to form a thin film) after mounting electronic components, and water droplets adhere to the circuit board 20 due to condensation. However, the electrical performance is not affected. In the circuit board 20, the mounting surface (upper surface in FIG. 1) side of the electronic component Z will be described as the front surface 21 side, and the opposite surface 22 will be described as the back side.

  The circuit casing 30 accommodates the entirety of the circuit board 20 therein, and is divided into two cover bodies, that is, a back surface cover body that covers the back surface 22 side of the circuit board 20 (the “cover” of the present invention). 31) (corresponding to “body”) and a surface-side cover body (corresponding to “cover body” of the present invention) 51 that covers the surface 21 side of the circuit board 20. Hereinafter, the specific configuration of the cover bodies 31 and 51 will be described in the order of the back surface side cover body 31 and the front surface side cover body 51.

  The back surface side cover body 31 is made of a synthetic resin, and is composed of a plate-shaped substrate portion 32 and a peripheral wall 41 erected along the periphery of the substrate portion 32, and as a whole, a tray type having a shallow bottom is formed. is doing. FIG. 3 shows a front view of the back surface side cover body 31 (a view of the back surface side cover body of FIG. 1 viewed from the direction A). As shown in this figure, the board portion 32 of the back surface side cover body 31 has a shape that is slightly larger than the circuit board 20 (indicated by a one-dot chain line in FIG. 3). The substrate portion 32 has a center at the lower end protruding downward, and has a pentagonal shape as a whole.

  The peripheral wall 41 formed along the outer edge of the substrate part 32 is continuously continuous over the entire circumference except for the center of the lower end of the substrate part 32. The peripheral wall 41 functions as a side wall that covers four sides of the outer periphery of the circuit board. The center of the lower end where the peripheral wall 41 is interrupted is a drain hole 45. Thus, by forming the drain hole 45 in the lower part of the cover, it becomes possible to drain water drops in the circuit casing 30 to the outside. In addition, in the present embodiment, the outer shape of the substrate portion 32 is a V-shaped inclined shape that is gently inclined from both sides in the casing width direction toward the formation position of the drainage hole 45, and water drops in the circuit casing 30 are It is configured to drain efficiently.

  Further, a prevention wall 35 is erected on the board portion 32 at a position below the attachment position of the circuit board 20 (indicated by a one-dot chain line in FIG. 3). The prevention wall 35 is located at the center of the substrate portion 32 in the width direction and is located above the drain hole 45, and together with the prevention wall 55 on the surface side cover body 51 side described below, the drainage. The hole 45 has a function of regulating the intrusion of water flowing (backflow) from the lower side into the circuit casing 30 through the hole 45.

  As shown in FIG. 3, the prevention wall 35 has an arcuate shape that curves to the lower side where the drain hole 45 is formed. The formation width (width in the left-right direction in FIG. 3) of the prevention wall 35 is set sufficiently wider than the formation width of the drain hole 45 (about twice in this embodiment). Further, the left and right wall end portions 36 of the prevention wall 35 extend downward, and the clearance with respect to the peripheral wall 41 (J portion in FIG. 3) is extremely small.

  The front surface side cover body 51 is made of a synthetic resin, and the outer shape thereof is substantially the same as the outer shape of the back surface side cover body 31, as shown in FIG. 32 is provided with a substrate portion 52 having the same shape as 32. Again, the shape of the substrate portion 52 of the front side cover body 51 will be described. The board portion 52 has a shape that is slightly larger than the circuit board 20, and the center of the lower end protrudes downward, and has a pentagonal shape as a whole. And among the board | substrate parts 52, as shown in FIG. 4, the support boss | hub 59 which forms a screw hole is provided in four places in the inner surface side facing the other party board | substrate part 32, and there, The circuit board 20 can be screwed.

  Further, on the inner surface side of the substrate portion 52, a peripheral wall 61 is erected without any breaks over the entire circumference except for the drain hole 65 formed at the center of the lower end, and further, a peripheral wall 63 is provided at a certain distance inside. It is erected. Further, a partition wall 64 is erected by connecting the two support bosses located on the lower side in FIG. 4 to each other. As shown in FIG. 7, the peripheral wall 63 on the inner side of the substrate portion 52 is for aligning the cover bodies 31 and 51 in the plane direction, and is fitted to the inner periphery 41 </ b> A of the peripheral wall 41 of the substrate portion 32. It is possible.

  And the drain hole 65 formed in the front side cover body 51 is made the same width as the drain hole 45 of the back side cover body 31, and the formation position is also the same position as the drain hole 45 of the back side cover body 31. 7 when the two cover bodies 31, 51 are fitted to each other while fitting the peripheral wall 63 of the front surface side cover body 51 to the inner periphery 41A side of the peripheral wall 41 of the back surface side cover body 31. As shown, both drain holes 45, 65 are in alignment.

  When the cover bodies 31, 51 are aligned, the front end of the peripheral wall 61 of the front cover body 51 abuts the front end face 43 of the peripheral wall 41 of the back cover body 51 (in FIG. 7, on the peripheral wall 41). And the cover bodies 31 and 51 are fixed to each other by vibration welding. Moreover, the front-end | tip part of the surrounding wall 61 is formed in the taper shape so that it may melt easily at the time of welding (it shows with the broken line in the H part in FIG. 8). Further, both the cover bodies 31 and 51 do not form any openings in the substrate portions 32 and 52, and when the vibration welding is performed, the circuit casings except for the locations where the drain holes 45 and 65 are formed. The entire 30 is sealed.

  Further, a prevention wall 55 is formed above the drain hole 65 in the substrate portion 52. The prevention wall 55 has an arc shape that curves downward in FIG. Although the formation width of the prevention wall 55 (width in the left-right direction in FIG. 4) is wider than the formation width of the drain hole 65, the formation width is limited in relation to the prevention wall 35 on the back cover body 31 side. It is narrow, and the position of the formation position is also shifted downward. By doing so, as shown in FIG. 7, when both cover bodies 31 and 51 are aligned, both the prevention walls 35 and 55 do not interfere with each other in the plane direction and are prevented. The prevention wall 55 fits below the wall 35. And these both prevention walls 35 and 55 are set as the structure where front-end | tip parts mutually overlap in the thickness direction (left-right direction of FIG. 9) of the circuit casing 30, as shown to (a) of FIG.

  Here, if the prevention wall is formed only on the cover body on one side, as shown in FIG. 9B, there is a gap for water to enter between the substrate portion 52 and the tip of the prevention wall 35. However, as in the present embodiment, if the prevention walls 35 and 55 are provided on the cover bodies 31 and 51, respectively, and the tip portions thereof are overlapped with each other, such a gap cannot be formed, Intrusion (indicated by the arrow R in the figure) can be effectively prevented.

  Further, on the outer surface of the substrate portion 52 of the front surface side cover body 51, a pair of seat portions 53, 54 are formed from the back side to the near side in FIG. A horizontally long connector block 100 that extends over the entire width of the substrate portion 52 is integrally formed on the outer surface of the substrate. This connector block 100 is provided with six hood portions 115 to 165 arranged in the width direction, and constitutes six connectors 110 to 160. The hood portions 115 to 165 of each of these six connectors 110 to 160 are each provided with a fitting port for fitting the mating connector on the front side in FIG. 1 (lower side when the electric connection box 10 is mounted on the vehicle). The mating connector is fitted by an assembling operation from the lower side.

  In the connector block 100, bus bars B1 to B6 are insert-molded so as to correspond to the hood portions 115 to 165, respectively. Each of the bus bars B1 to B6 is formed by bending a metal plate into an L shape, and has one end protruding into the corresponding hood portion 115 to 165 as shown in FIG. Further, the other end sides of the bus bars B1 to B6 are all drawn out to the circuit board 20 side and are configured to be inserted through the through holes SH of the circuit board 20.

  As described above, the connector block 100 in which the connectors 110 to 160 are integrated is formed integrally with the front-side cover body 51, so that the airtightness of the circuit casing 30 covering the circuit board 20 is increased. More specifically, when the connectors 110 to 160 are not formed integrally on the circuit casing 30 side and are separate parts, there are not a few gaps for water to enter into the mating portions of the two. In this regard, in the embodiment, by forming the connector block 100 in which the connectors 110 to 160 are integrated in the circuit casing 30, such a gap that causes water intrusion cannot be originally formed, and the circuit casing 30. The airtightness can be increased.

  In the connector block 100 described above, all the wall surfaces other than the bottom wall that forms the fitting port are closed, and this also improves the airtightness of the circuit casing 30.

  Hereinafter, the connectors 110 to 160 arranged side by side will be briefly described. Both connectors located on both sides in the width direction are input side power connectors 110 and 120. As shown in FIG. 6, the input-side power connectors 110 and 120 are provided on seat portions 53 and 54 formed with a predetermined width on the substrate portion 52, compared to the other connectors 130 to 160. The height from the outer surface of the substrate portion is one step higher.

  The number of poles of the input side power connectors 110 and 120 is one, and a mating connector (not shown) connected to an in-vehicle battery (not shown) and an alternator (not shown) is fitted there. It has come to be.

  The connector with 2 poles indicated by reference numeral 130 shown in FIG. 6 is a GND connector, and the connector with 140 poles indicated by reference numeral 140 is an output-side power connector. The GND connector 130 electrically connects a ground line (not shown) of the circuit board 20 to a ground surface such as a chassis, and includes a connector electrically connected to a chassis to be connected. Is configured to be fitted. The output-side power connector 140 supplies power to an electrical component not shown, and a connector that is electrically connected to a circuit of the electrical component to be supplied is fitted therein. It has a configuration.

  Further, both connectors 150 and 160 shown in FIG. 6 are signal output connectors. These two connectors 150 and 160 are for causing a control signal to be output to an electrical component (not shown), in which a connector that is electrically connected to the circuit of the electrical component to be output is fitted. It has a configuration.

  Further, in the present embodiment, for example, in the input side power connector 120 and the like, the outer wall 100A of the connector block 100 constitutes the outer peripheral wall of the connector (see FIG. 10), whereas the signal output connector. As shown in FIG. 11, 150 and 160 have a hollow portion 105 between the outer wall 100 </ b> A of the connector block 100, and the outer wall 100 </ b> A of the connector block 100 is connected to both the signal output connectors 150 and 160. The mounted mating connector is double-wrapped with the hood portions 155 and 165 (see FIG. 12). In the following description, the portion of the outer wall 100A of the connector block 100 that double surrounds the mating connector together with the hood portions 155 and 165 of the signal output connectors 150 and 160 is referred to as a first surrounding wall 171.

  The lower wall 171A of the first surrounding wall 171 has a fixed dimension (in this embodiment, the dimension d in FIG. 12) from the lower end 210 of the mating connector 200 fitted to the signal output connectors 150 and 160. ) It extends downward so as to be positioned below, so that the entire mating connector 200 fitted to the signal output connectors 150 and 160 can be accommodated in the space inside the first peripheral wall 171. It has become.

  As shown in FIG. 1, the first surrounding wall 171 includes a second surrounding wall 172 formed by extending the left wall surface of the connector 150 downward, and a third surrounding wall 173 formed by extending the right wall surface of the connector 160 downward. The three surrounding walls 171 to 173 collectively surround three sides of the mating connectors that are fitted to the signal output connectors 150 and 160 by the three surrounding walls 171 to 173. It has a configuration. Of course, the lower ends of the second surrounding wall 172 and the third surrounding wall 173 are equal to the height position of the lower end of the first surrounding wall 171 in the vertical direction as shown in FIGS.

  Of the connectors 110 to 160 described above, for the bus bar B having two or more poles (specifically, the GND connector 130 and the signal output connectors 150 and 160), the hood parts 135 and 155 , 165 (specifically, the bottom wall closest to and parallel to the outer surface of the substrate portion 52) is recessed to provide recesses 137, 157, 167 (see FIGS. 2 and 6). Each of these recesses 137, 157, and 167 is formed with a constant width and a constant depth, and is cut through the fitting ports of the hood portions 135, 155, and 165. The recesses 137, 157, and 167 form gaps AG with the outer wall of the connector when the mating connector 200 is fitted to the hood portions 135, 155, and 165 (see FIG. 12). .

  In this embodiment, the recesses 137, 157, and 167 are formed over the entire length of the hood portions 135, 155, and 165, and the ends of the recesses 137, 157, and 167 are as shown in FIG. The fitting surface U is reached.

  The structure of each member 20, 31, 51 which comprises the electrical junction box 10 is above, Next, the assembly procedure of the electrical junction box 10 is demonstrated. In order to assemble, first, it is necessary to fix the circuit board 20 to the front surface side cover body 51. In order to do this, as shown in FIG. 1, the surface 21 on which the electronic component Z is mounted is directed to the surface side cover body 511 side, and each insertion hole 25 on the substrate is provided in the surface side cover body 51 In this state, the circuit board 20 may be screwed to the support boss 59, and the circuit board 20 may be attached to the board portion 52 of the front surface cover body 51. Fixed in a floating state. In this state, the bus bars B <b> 1 to B <b> 6 of the connectors 110 to 160 integrally formed on the front surface side cover body 51 are inserted into the through holes SH on the circuit board 20.

  Thereafter, the inserted bus bars B1 to B6 are soldered to the through holes SH of the circuit board 20, and the bus bars B1 to B6 are electrically connected to the conductive paths (not shown) of the circuit board 20.

  Next, as shown in FIG. 1, the front surface side cover body 51 is overlapped on the rear surface side cover body 31 while the circuit board 20 is directed downward. In this state, of the two peripheral walls 61 and 63 formed on the front surface side cover body 51, the inner peripheral wall 63 is in a state of being fitted to the inner periphery 41A of the peripheral wall 41 of the back surface side cover body 31. The outer peripheral wall 61 comes into contact with the front end surface of the peripheral wall 41 of the back surface side cover body 31. More specifically, the peripheral wall 61 of the front surface side cover body 51 is opposed to the front end surface 43 of the peripheral wall 41 of the back surface side cover body 31 over the entire periphery of the cover body except for the locations where the drain holes 45 and 65 are formed. It will be in a state of hitting.

  Thereafter, the outer peripheral portions of the overlapped cover bodies 31, 51 are sandwiched over the entire circumference by an attachment (not shown), and vibration is applied to the cover bodies 31, 51 by the vibration welding device. Thereby, the front-end | tip part of the surrounding wall 63 of the surface side cover body 51 melt | dissolves by the frictional heat by vibration, and is joined to the surrounding wall 41 of the back surface side cover body 31. FIG.

  Thus, the contact location (see FIG. 11) K between the peripheral walls 41, 61, which is the combination of the front and back cover bodies 31, 51, is the entire circumference (range # in FIG. 5) except for the locations where the drain holes 45, 65 are formed. ) Are joined without a gap, and the circuit casing 30 is sealed over the entire circumference except for the locations where the drain holes 45 and 65 are formed. In other words, the entire circuit casing 30 except for the locations where the drain holes 45 and 65 are formed is in a state in which there is no gap at all, so that the intrusion of water into the internal space in which the circuit board 20 is accommodated can be blocked. In this state, the circuit board 20 is located inside the back side cover body 31 in the thickness direction of the circuit casing 30 as shown in FIG. All the water droplets adhering to the surface are collected on the back side cover body 31 side.

  The assembled electrical junction box 10 is vertically oriented with the circuit board 20 housed inside in a vertical direction with respect to a box (corresponding to an attachment location, not shown) installed in the vehicle engine room. (In the direction of FIG. 5).

  At the same time as or before and after the electrical connection box 10 is attached to the box, the mating connectors connected to the power supply, electrical components, etc. are attached to the hoods 115 to 165 of the connectors 110 to 160 from below. Then, the electric power supplied from the power source can be distributed and supplied to each electrical component through the electric connection box 10, and switching of the electric power supply can be controlled by the electric connection box 10.

Then, the effect | action and effect of this embodiment are demonstrated.
According to the electrical junction box 10, the contact portion K between the peripheral walls 41, 61 that are the combination of both cover bodies 31, 51 that constitute the circuit casing 30 extends over the entire circumference (excluding the drain holes 45, 65). To seal. Moreover, the connector block 100 is formed integrally with the cover body 51. If it does in this way, there will be almost no clearance in which a water drop enters except circuit drain holes 45 and 65 in circuit casing 30, and high waterproof performance can be exhibited.

  Further, according to the electrical connection box 10, the signal output connectors 150 and 160 are provided with the surrounding walls 171 to 173 so as to correspond to these, and the mating connector attached to the signal output connectors 150 and 160. 200 is enclosed with the hood parts 155 and 165 in a double manner. Moreover, the lower ends of the surrounding walls 171 to 173 are located below the lower end of the mating connector 200, and the entire mating connector is housed in the internal space of the surrounding walls 171 to 173.

  By doing in this way, for example, even if water is applied to the electrical connection box 10 due to a car wash or the like, it drops while passing through the outer wall of the connector block 100 and reaches the lower end of the surrounding walls 171 to 173. After that, it falls as it is due to its own weight, or further travels downward, and does not adhere to the signal output connectors 150 and 160 side. If the surrounding walls 171 to 173 are not formed, the water droplet W enters the hood portion 250 from the opening 251 of the hood portion 250 or the water droplet W becomes hood portion 250 as shown in FIG. If the water droplets spread along the lower end 255, the gap Q between the connectors may be sucked up by capillarity and reach the fitting surface U between the connectors. Such a situation cannot occur, and the two connectors to be fitted, and thus the terminals accommodated therein, and the bus bar B can be effectively waterproofed and protected.

  The other connectors 110 to 140 are not provided with the surrounding walls 171 to 173. The connectors 110, 120, and 140 have one pole, and the connector 130 has both bus bars for ground. This is because, since the potentials are equal, there is no risk of leakage between the bus bars even if it gets wet.

  Moreover, in this embodiment, as shown in FIG. 2, about the food | hood parts 135, 155, 165, the inner wall is recessed and the recessed parts 137, 157, 167 are formed, The other party connector fitted there A gap AG is formed between the outer wall and the outer wall (see FIG. 12). In this way, even if water drops adhere to the mating connectors (for example, the connector 160 and the mating connector 200), water is sucked up between the wall surfaces Q of the mating connectors by capillary action. It is possible to reduce the amount of water that cannot be sucked or sucked up.

  Also, as shown in FIG. 12, in the present embodiment, a so-called retainer or the like is not provided in the mating connector 200, and the connector housing 210 has a continuous cylindrical shape. If this is done, water will hardly enter the connector, which is also effective.

  Moreover, since the connector block 100 is provided in the upper part of the cover body 51, even if the box which accommodates the electrical connection box 10 should be flooded, it takes time until the water level reaches the height of the connector block 100. The structure is strong against water immersion.

  Further, drain holes 45 and 65 are formed in the lower part of the circuit casing 30, and the outer shape of the circuit casing 30 is V-shaped so as to incline from both sides in the width direction toward the positions where the drain holes 45 and 65 are formed. I am doing. In this way, moisture generated in the circuit casing 30 due to condensation or the like is smoothly drained to the outside through the drain holes 45 and 65 (mainly drained through the drain holes 45). There is almost no stay in 30. Moreover, in this embodiment, since the prevention walls 35 and 55 are formed in the circuit casing 30, it is possible to prevent water from entering the circuit casing 30 through the drain holes 45 and 65. This point is also effective. Is.

  In addition, the electrical junction box 10 is composed of only three parts, that is, the cover bodies 31 and 51 constituting the circuit casing 30 and the circuit board 20, and has a smaller number of parts than the conventional one, and the cost. High effect.

<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.

  (1) In the above embodiment, the connector block 100 is integrally formed with the front cover 51. However, the connector block 100 may be a separate body, and the connectors 110 to 160 may be individually separated. Is also possible.

  (2) In the above embodiment, the example in which the concave portions 137, 157, and 167 that form gaps between the two connectors to be fitted are formed on the inner wall side of the hood portions 135, 155, and 165 is shown. The outer wall of the mating connector can be recessed, or both can be recessed.

  (3) In the said embodiment, as an example of the method of sealing the contact location K of the surrounding walls 41 and 61 used as the alignment of both the cover bodies 31 and 51, the surrounding walls 41 and 61 of both the cover bodies 31 and 51 are sealed. In addition to this, what is welded by vibration is exemplified, but other than this, for example, a contact portion between the peripheral walls 41 and 61 is sealed with an adhesive, or a packing (rubber) is interposed between the peripheral walls 41 and 61. What is inserted and sealed is applicable.

  (4) In the said embodiment, the recessed parts 137, 157, 167 are formed over the full length of each food | hood part 135, 155, 165, and the termination | terminus of the recessed parts 137, 157, 167 is as shown in FIG. Although it has reached the fitting surface U, the formation range of the recess is not limited to this, and it is possible to adopt a configuration up to the middle (the end does not necessarily have to extend to the fitting surface U). is there.

  (5) In the above embodiment, the two cover bodies 31 and 51 constituting the circuit casing 30 are exemplified by the peripheral portions 41 and 61 provided on the outer periphery of the substrate portions 32 and 52. It is also possible to configure the cover body constituting 30 as follows. A peripheral wall is provided only for the cover member on one side, and the cover member on the other side has a flat shape with only the substrate portion. Then, the one-side cover body is overlaid on the mating cover body so that the peripheral wall abuts against the mating substrate portion.

The exploded perspective view of the electric junction box applied to one embodiment of the present invention Perspective view of electrical junction box The figure which looked at the back side cover body in Drawing 1 from the A direction The figure which looked at the surface side cover body in Drawing 1 from the B direction Front view of electrical junction box The figure which looked at FIG. 5 from the C direction EE line sectional view of FIG. DD sectional view of FIG. (A) The figure which expanded the I section in FIG. 8 (b) The figure which shows a comparative example FF sectional view of FIG. GG sectional view of FIG. The figure which shows the state which made the other party connector fit the hood part Illustration of the problem

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Electrical junction box 20 ... Circuit board 30 ... Circuit casing 31 ... Back side cover body 32 ... Substrate part 35 ... Prevention wall 41 ... Perimeter wall 45 ... Water drain hole 51 ... Front side cover body 52 ... Substrate part 55 ... Prevention wall 61 ... peripheral wall 65 ... drain hole B1-B6 ... bus bar 100 ... connector block 110-160 ... connector 171-173 ... surrounding wall 171A ... lower end 137, 157, 167 ... concave part 200 ... mating connector 210 ... lower end

Claims (2)

A circuit board formed by mounting electronic components on the board;
A circuit casing divided and configured by two cover bodies that share and cover both front and back surfaces of the circuit board;
A connector having a bus bar electrically connected to the conductive path of the circuit board and having a fitting surface to the mating connector facing downward with respect to the circuit casing, and a predetermined attachment An electrical connection box arranged vertically with the circuit board facing up and down with respect to a location,
On the outer peripheral side of the hood portion of the connector to which the mating connector is fitted, an enclosure wall is provided that doublely encloses the mating connector together with the hood portion, and this enclosure wall is connected to the mating connector fitted to the hood portion. An electrical junction box characterized in that it extends from the lower end to at least the lower side.   The inner wall of the hood portion of the connector or the outer wall of the mating connector that fits into the hood portion of the connector is provided with a recess that forms a gap with the mating wall surface on either side. The electrical junction box according to claim 1, wherein

Images