JP5608453B2 - Electrical junction box - Google Patents

Description

  The present invention relates to an electrical junction box, and relates to an electrical junction box including a wiring board, a bus bar overlaid on the wiring board, and a case for housing the wiring board and the bus bar.

  A variety of electronic devices are mounted on automobiles. In order to supply power and transmit signals to these various electronic devices, electrical junction boxes are arranged at appropriate locations in the automobile. In the present invention, a junction block (also referred to as a junction box), a fuse block (also referred to as a fuse box), and a relay block (also referred to as a relay box) are collectively referred to as an electrical connection box.

  As this electric junction box, those having various structures are used depending on the vehicle type, and for example, those shown in FIGS. 8 and 9 have been proposed (for example, Patent Document 1). As shown in the figure, the electrical junction box 100 includes a wiring board (not shown), a bus bar (not shown) stacked on the wiring board, and a case 101 that accommodates the wiring board and the bus bar.

  The bus bar is provided with a bus bar body (not shown) superimposed on the plane of the wiring board and a tab terminal 102 (shown in FIG. 9) that protrudes outward from the edge of the wiring board in the plane direction. The bus bar main body side of the tab terminal 102 is mounted on a bottom wall 103 provided in a case 101 described later, as shown in FIG. A plurality of ribs 104 are provided on the bottom wall portion 103 so as to sandwich the width direction of the tab terminal 102. The rib 104 can be fixed by restricting the movement of the tab terminal 102 in the width direction.

  The case 101 is provided with a cylindrical hood portion 105 that accommodates the tab terminal 102. When the mating connector is fitted to the hood portion 105, the connection terminal of the mating connector is connected to the tab terminal 102.

  The case 101 is composed of an upper case 106 and a lower case 107 that divide the hood portion 105 into two in the thickness direction of the wiring board. The hood portion 105 of the lower case 107 is provided with a welding boss 108 as a boss standing up toward the side wall of the upper case 106, and the welding boss 108 is fitted to the hood portion 105 of the upper case 106. A welding hole 109 is provided as a fitting hole.

  Then, the upper case 106 and the lower case 107 are brought into contact with each other, the welding boss 108 is fitted into the welding hole 109, and then the tip of the welding boss 108 protruding from the welding hole 109 is subjected to a welding treatment, whereby the upper case 106. And the lower case 107 are coupled. Thus, by providing the hood part 105 with the welding boss 108 and the welding hole 109 and performing heat welding, the hood part 105 can be prevented from opening when the mating connector is fitted to the hood part 105.

JP 2001-286030 A

  However, in the above-described conventional electrical junction box 100, the welding boss 108 and the rib 104 are separately provided, so that there is a problem that the hood portion 105 is enlarged. Further, since the welding boss 108 is provided toward the side wall of the upper case 106, the coupling of the upper and lower cases 106 and 107 at the center of the hood portion 105 is particularly insufficient, and the hood portion 105 is reliably prevented from opening. There was a problem that I could not.

  Then, this invention makes it a subject to provide the electrical junction box which can prevent the opening of a hood part reliably, aiming at size reduction.

  The invention according to claim 1 for solving the above-described problem is a wiring board, a bus bar body stacked on a plane of the wiring board, and an edge of the wiring board protruding outward in the planar direction. A bus bar provided with a tab terminal, and a case for receiving the bus bar and the wiring board provided with a cylindrical hood portion for receiving the tab terminal and fitted with a mating connector, The case is composed of an upper case and a lower case that divide the hood portion into two in the thickness direction of the wiring board, and a boss is provided on one hood portion of the upper case and the lower case so as to stand toward the other. In the electrical junction box in which the other hood portion of the upper case and the lower case is provided with a fitting hole for fitting the boss, a plurality of the bosses are arranged side by side along the edge of the wiring board. And according to the boss The way the movement of the arrangement direction of the boss of the tab terminal is restricted, consists in an electrical connection box, characterized in that the tab terminal is sandwiched between the boss and the boss Te.

  According to a second aspect of the present invention, in the bus bar, the thickness direction of the wiring board is sandwiched between a side wall provided in the case and the wiring board. It exists in the electrical junction box described.

  According to a third aspect of the present invention, the bus bar is bent in a crank shape so that a side surface laminated portion is provided on the side surface of the wiring board between the bus bar main body and the tab terminal. It exists in the electrical-connection box of Claim 1 or 2 characterized by the above-mentioned.

  The invention according to claim 4 resides in the electrical junction box according to claim 3, wherein the side surface laminated portion is sandwiched between a side wall portion provided in the case and the wiring board. .

  According to a fifth aspect of the present invention, there is provided a planar laminate in which a projection is provided on a side surface of the wiring board, and the bus bar is superimposed on a plane of the projection between the side laminate and the tab terminal. The electrical connection box according to claim 4, wherein the planar laminated portion is sandwiched between a side wall portion and the projection portion sandwiching the side surface laminated portion.

  The bus bar is overlaid on a pair of planes facing each other in the thickness direction of the wiring board, and the upper case side plane of the projecting portion includes the upper case side plane. The plane laminated portion of the bus bar overlaid is overlapped, and the plane laminated portion of the bus bar overlaid on the plane on the lower case side is overlaid on the plane on the lower case side of the protrusion. The electrical connection box according to claim 5 is provided.

  As described above, according to the invention of claim 1, a plurality of bosses are erected side by side along the edge of the wiring board, and movement of the tab terminal bosses in the arrangement direction is regulated by the bosses. Since the tab terminal is arranged between the boss and the boss, the upper case can have both the function of connecting the upper case and the lower case to the boss and the function of restricting the movement of the tab terminal. In addition, it is not necessary to separately provide a boss that couples the lower case and a boss that regulates the movement of the tab terminal, and the cost can be reduced. Further, since the boss can be protruded into the hood portion, the upper case and the lower case can be further firmly coupled, and the hood portion can be reliably prevented from opening.

  According to the invention described in claim 2, since the bus bar is sandwiched between the wiring board and the side wall provided in the case in the thickness direction of the wiring board, the side wall provided in the case and the wiring board Thus, movement of the bus bar in the thickness direction of the wiring board can be restricted.

  According to the invention of claim 3, since the bus bar is bent in a crank shape so as to provide a side surface laminated portion that is superimposed on the side surface of the wiring board between the bus bar main body and the tab terminal, the hood portion When the mating connector is inserted into the bus bar, the side surface laminated portion of the bus bar hits the side surface of the wiring board and the movement is restricted. Accordingly, even if the bus bar is not formed in a crank shape on the plane of the wiring board, the movement of the mating connector of the bus bar in the insertion direction can be restricted, and further miniaturization can be achieved.

  According to the invention described in claim 4, since the side surface laminated portion is sandwiched between the side wall portion provided on the case and the side surface of the wiring board, when removing the mating connector from the hood portion, the side surface of the bus bar The movement is restricted when the stacked portion hits a side wall provided in the case. Accordingly, even if the bus bar is not formed in a crank shape on the plane of the wiring board, the movement of the bus bar in the direction of removing the mating connector can be restricted, and further miniaturization can be achieved.

  According to the fifth aspect of the present invention, the side surface of the wiring board is provided with the protrusion, and the bus bar is provided with the planar laminated portion on the plane of the protruding portion between the side surface laminated portion and the tab terminal. Since the planar laminated portion is sandwiched between the side wall portion and the protruding portion sandwiching the side surface laminated portion, the movement in the thickness direction of the wiring board of the bus bar is regulated by the side wall portion and the protruding portion. Can do. In addition, by restricting the movement of both the direction of removing the mating connector of the bus bar and the thickness direction of the wiring board with one side wall, the side wall and wiring for regulating the movement of the mating connector of the bus bar are removed. There is no need to separately provide a side wall portion that restricts movement in the thickness direction of the plate, and space saving can be achieved.

  According to the invention described in claim 6, the bus bars are respectively overlapped on a pair of planes opposed to each other in the thickness direction of the wiring board, and are superimposed on the plane on the upper case side on the plane on the upper case side of the protrusion. Since the planar laminated portion of the bus bar is overlaid and the planar laminated portion of the bus bar overlaid on the lower case side plane is overlaid on the lower case side plane of the protrusion, The movement in the direction of removing the mating connector of the provided bus bar and the thickness direction of the wiring board can be restricted.

It is a partial section perspective view of the electric junction box of the present invention in a 1st embodiment. It is the II sectional view taken on the line of the electrical junction box shown in FIG. It is a perspective view of the bus bar shown in FIG. (A) is a partial schematic side view of the electrical junction box shown in FIG. 1, and (B) is an exploded partial side view of (A). It is sectional drawing of the electrical-connection box of this invention in 2nd Embodiment. It is sectional drawing of the electrical-connection box of this invention in 2nd Embodiment. It is a perspective view of the bus bar shown in FIG.5 and FIG.6. It is a fragmentary perspective view which shows an example of the conventional electrical junction box. It is a partial side view of the electrical junction box shown in FIG.

First Embodiment Hereinafter, an electrical junction box according to a first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the electrical junction box 1 includes a wiring board 2, a bus bar 3 overlaid on the wiring board 2, and a case 4 that accommodates the wiring board 2 and the bus bar 3.

  The wiring board 2 is provided in a substantially flat plate shape, and a bus bar 3 and an electric wire 5 described later are disposed on the plane. In addition, electrical components such as fuses and relays are held in a main cover 42 which will be described later, which constitutes the case 4 that houses the wiring board 2. The end of the bus bar 3 arranged on the wiring board 2 is bent at 90 degrees so as to stand up toward the main cover 42, and the main cover described above is attached to the end of the bus bar 3 standing up. Connection terminals to be connected to the electrical components held by 42 are formed. As shown in FIGS. 1 and 2, protrusions 21 and 22 projecting in the thickness direction Y1 are provided on the plane of the wiring board 2 on the side of the main cover 42 to be described later, as shown in FIGS. . The protrusions 21 and 22 are provided so as to be spaced apart from each other in the insertion / removal direction Y2 of the mating connector orthogonal to the edge of the wiring board 2. A plurality of bus bars 3 to be described later are stacked side by side on the protrusions 21 and 22.

  Further, a wire insertion groove 23 (FIG. 1) for inserting a wire 5 connected to a bus bar 3 described later is formed on the protrusion 22 on the side away from the edge in the insertion / removal direction Y2 among the protrusions 21 and 22. A plurality are provided. As shown in FIG. 1, the wire insertion groove 23 has an opening formed on the side away from the wiring board 2, and the electric wire 5 is inserted from the opening on the side away from the wiring board 2.

  Further, the both side walls forming the wire insertion groove 23 are provided with press contact terminal insertion grooves 24 (FIG. 1) into which both ends in the width direction of press contact terminals 35 of the bus bar 3 described later are inserted. Further, the bottom wall portion forming the wire insertion groove 23 is provided with a pressure contact terminal insertion groove 25 (FIG. 2) into which a longitudinal end portion of a pressure contact terminal 35 of the bus bar 3 described later is inserted.

  On the other hand, as shown in FIGS. 1 and 2, the protrusion 21 on the edge side in the insertion / removal direction Y2 of the protrusions 21 and 22 is formed with a thick portion facing the wire insertion groove 23, and the wire insertion groove A portion facing the side wall portion forming 23 is formed thin. Further, the side surface of the wiring board 2 is provided with a protruding portion 26 (corresponding to a protruding portion provided on the side surface of the wiring board 2 in the claims) protruding outward from the protruding portion 21.

  The bus bars 3 are respectively provided on a pair of planes facing the thickness direction Y1 of the wiring board 2, and are formed by punching and pressing a metal plate. The bus bar 3 is a terminal fitting that is fitted in a groove portion along the shape of the bus bar 3 provided on the wiring board 2 and is connected to the electric wire 5 routed in the electric connection box 1. As shown in FIGS. 1 and 3, the bus bar 3 on the main cover 42 side, which will be described later, has a bus bar body 31 overlaid on the planes of the protrusions 21 and 22, and an outer side in the plane direction from the edge of the wiring board 2. And a tab terminal 32 projecting toward the terminal.

  Further, as shown in FIGS. 1 and 3, the bus bar 3 on the main cover 42 side, which will be described later, is provided with a side laminated portion 33 that is overlapped on the side surface of the protruding portion 21 between the bus bar main body 31 and the tab terminal 32. As can be seen, it is bent into a crank shape. In addition, the bus bar 3 on the main cover 42 side, which will be described later, is provided with a planar laminated portion 34 that is superimposed on the plane of the protruding portion 26 between the side laminated portion 33 and the tab terminal 32.

  Further, the end of the bus bar 3 on the side opposite to the tab terminal 32 on the main cover 42 side, which will be described later, is bent 90 degrees in a direction approaching the wiring board 2 and is provided with a press contact terminal 35 that presses against the electric wire 5. . As shown in FIG. 3, the press contact terminal 35 is provided with a pair of press contact blades 36 facing each other. When the electric wire 5 is inserted between the pair of press contact blades 36, the electric wire 5 is pressed against the press contact terminal 35.

  As shown in FIGS. 1 to 3, the bus bar 3 on the under cover 43 side, which will be described later, has a bus bar body 31 superimposed on a plane on the under cover 43 side of the wiring board 2, and the plane direction from the edge of the wiring board 2. And a tab terminal 32 protruding outward. The bus bar body 31 is bent in a crank shape on the plane of the wiring board 2. Thus, by bending the bus bar main body 31 in a crank shape on the plane of the wiring board 2 and fitting it in a groove provided in the wiring board 2, the movement of the bus bar 3 in the insertion / removal direction Y2 can be restricted.

  The case 4 is provided with a tubular hood portion 41 that accommodates the tab terminal 32 and into which the mating connector is fitted. The case 4 includes a main cover 42 as an upper case and an under cover 43 as a lower case that divides the hood portion 41 into two in the thickness direction Y1.

  As shown in FIGS. 1, 2, and 4, the hood portion 41 of the main cover 42 is provided with a side wall portion 44 that protrudes toward the planar laminated portion 34 of the bus bar 3. The side wall 44 is provided with a welding boss 45 as a boss. A plurality of the welding bosses 45 are erected along the edge of the wiring board 2.

  As shown in FIG. 4, the tab terminal 32 is disposed between the welding boss 45 and the welding boss 45 so that the movement of the welding boss 45 of the tab terminal 32 in the alignment direction Y <b> 3 is restricted by the welding boss 45. Yes. The welding boss 45 is fitted in a groove provided on the side surface of the protrusion 26. Further, the planar laminated portion 34 of the bus bar 3 on the main cover 42 side is sandwiched between the upper wall of the groove provided between the welding boss 45 of the side wall portion 44 and the welding boss 45 and the projection portion 26.

  Further, as shown in FIGS. 2 and 4, the hood portion 41 of the under cover 43 is provided with a welding hole 46 as a fitting hole into which the welding boss 45 is fitted. Then, the main cover 42 and the under cover 43 are brought into contact with each other, and the welding boss 45 is fitted into the welding hole 46, and then the tip of the welding boss 45 protruding from the welding hole 46 is subjected to a welding process. The under cover 43 is coupled.

  Further, the hood portion 41 of the under cover 43 is provided with a side wall portion 47 that protrudes toward the bus bar 3 on the under cover 43 side. As shown in FIG. The movement in the thickness direction Y1 is restricted by being sandwiched between the side wall portion 47 and the wiring board 2.

  According to the electrical connection box 1 described above, a plurality of welding bosses 45 are arranged side by side along the edge of the wiring board 2, and movement of the welding bosses 45 of the tab terminals 32 in the arrangement direction Y <b> 3 is restricted by the welding bosses 45. As described above, since the tab terminal 32 is disposed between the welding boss 45 and the welding boss 45, the function of connecting the main cover 41 and the under cover 43 to the welding boss 45 and the function of restricting the movement of the tab terminal 32. Therefore, it is not necessary to separately provide a boss for connecting the main cover 41 and the under cover 43 and a boss for restricting the movement of the tab terminal 35, and the cost can be reduced. In addition, since the welding boss 45 can project from the hood portion 41, the coupling between the main cover 42 and the under cover 43 can be further strengthened, and the opening of the hood portion 41 can be reliably prevented.

  Moreover, according to the electrical junction box 1 described above, the bus bar 3 is bent in a crank shape so that the side surface laminated portion 33 is provided between the bus bar main body 31 and the tab terminal 32 so as to overlap the side surface of the wiring board 2. Therefore, when the mating connector is inserted into the hood portion 41, the side surface laminated portion 33 of the bus bar 3 hits the side surface of the wiring board 2 and the movement is restricted. Thereby, even if the bus bar 3 is not formed in a crank shape on the plane of the wiring board 2 like the bus bar 3 on the under cover 43 side, the movement in the insertion direction of the mating connector of the bus bar 3 can be restricted. Further downsizing can be achieved.

  In addition, according to the electrical connection box 1 described above, the protruding portion 26 is provided on the side surface of the wiring board 2, and the bus bar 3 is placed on the plane of the protruding portion 26 between the side surface laminated portion 33 and the tab terminal 32. Since the overlapped planar laminated portion 34 is provided, and the planar laminated portion 34 is sandwiched between the side wall portion 44 provided in the case 4 and the protrusion 26, the side wall portion 44 provided in the case 4 and the wiring board 2 can regulate the movement of the wiring board 2 in the thickness direction Y <b> 1 of the planar laminated portion 34. Moreover, according to the electrical junction box 1 described above, by providing the welding boss 45 on the side wall portion 44, it is necessary to separately provide the side wall portion 44 and the welding boss 45 that restrict the movement of the bus bar 3 in the thickness direction Y1. There is no.

  In addition, according to 1st Embodiment mentioned above, although the welding boss | hub 45 was erected on both sides of all the tab terminals 32, this invention is not limited to this. In the present invention, the welding bosses 45 may be provided upright on both sides of at least one tab terminal 32 among the plurality of tab terminals 32.

  Moreover, according to 1st Embodiment mentioned above, although the projection part 26 was provided in the wiring board 2, and the side surface lamination | stacking part 33 was provided in the bus bar 3, and it formed in the crank shape, this invention is not limited to this. . For example, the bus bar main body 31 and the tab terminal 32 may be provided so as to be continuous without providing the side surface laminated portion 33 in the bus bar 3. In this case, the bus bar main body 31 is sandwiched between the side wall portion 44 and the wiring board 2 to restrict the movement of the bus bar 3 in the thickness direction Y1.

Second Embodiment Next, an electric junction box 1 according to a second embodiment of the present invention will be described with reference to FIGS. In addition, in the same figure, the same code | symbol is attached | subjected to the part equivalent to the electrical junction box 1 already demonstrated in 1st Embodiment mentioned above about FIGS. 1-4, and the detailed description is abbreviate | omitted. A significant difference between the first embodiment and the second embodiment is the position of the side wall portion 44 provided on the main cover 42. In the first embodiment, the side wall portion 44 provided on the case 4 is provided apart from the side surface laminated portion 33 of the bus bar 3. However, in the second embodiment, the bus bar 3 is inserted by the side wall portion 44 and the wiring board 2. The side surface laminated portion 33 of the bus bar 3 is sandwiched between the side wall portion 44 provided in the case 4 and the wiring board 2 so that the movement in the removal direction Y2 is restricted. In addition, as in the first embodiment, the planar laminated portion 34 is sandwiched between the side wall portion 44 provided on the case 4 and the projection portion 26.

  Since the side surface laminated portion 33 is sandwiched between the side wall portion 44 provided on the case 4 and the side surface of the wiring board 2 in this way, when removing the mating connector from the hood portion 41, the side surface laminated portion of the bus bar 3 is laminated. The movement of the portion 33 is restricted by hitting the side wall portion 44 provided in the case 4. Accordingly, even if the bus bar 3 is not formed in a crank shape on the plane of the wiring board 2, the movement of the mating connector of the bus bar 3 in the insertion / removal direction Y2 can be restricted, and further miniaturization can be achieved. it can.

  A significant difference between the first embodiment and the second embodiment is the shape of the bus bar 3 on the under cover 43 side. Like the bus bar 3 on the main cover 42 side, the bus bar 3 on the under cover 43 side is provided with a side surface stacking portion 33 that is overlapped on the side surface of the wiring board 2 between the bus bar main body 31 and the tab terminal 32. It is bent into a crank shape. Further, the bus bar 3 on the under cover 43 side is provided with a planar laminated portion 34 that is superimposed on the plane of the protruding portion 26 between the side laminated portion 33 and the tab terminal 32. Then, the plane laminated portion 34 is sandwiched between the side wall portion 47 provided on the under cover 43 and the projection portion 26, and the side surface laminated portion 33 is provided between the side wall portion 47 provided on the under cover 43 and the wiring board 2. It is sandwiched. Thereby, the movement of the mating connector Y2 of the bus bar 3 in the attaching / detaching direction Y2 can be restricted without forming the bus bar 3 in a crank shape on the plane of the wiring board 2 as in the first embodiment. Further downsizing can be achieved.

  According to the second embodiment described above, by restricting the movement in both the attaching / detaching direction Y2 of the mating connector of the bus bar 3 and the thickness direction Y1 of the wiring board 2 with one side wall 44, 47, the bus bar 3 Therefore, it is not necessary to separately provide a side wall portion that restricts the movement of the mating connector in the attaching / detaching direction Y2 and a side wall portion that restricts the movement of the wiring board 2 in the thickness direction Y1, and space can be saved.

  Further, according to the above-described second embodiment, the bus bars 3 are respectively overlapped on a pair of planes facing the thickness direction Y2 of the wiring board 2, and the main cover 42 side plane of the protrusion 26 has a main plane. The plane laminated portion 34 of the bus bar 3 overlaid on the plane on the cover 42 side is overlaid, and the plane laminated portion 34 of the bus bar 3 overlaid on the plane on the under cover 43 side is superimposed on the plane on the under cover 43 side of the protrusion 26. Therefore, the movement of the wiring board 2 of the bus bar 3 provided on the pair of planes of the wiring board 2 in the thickness direction and the attachment / detachment direction can be restricted.

  Further, the above-described embodiments are merely representative forms of the present invention, and the present invention is not limited to the embodiments. That is, various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Electrical junction box 2 Wiring board 3 Bus bar 4 Case 26 Protrusion part 31 Bus bar main body 32 Tab terminal 33 Side surface laminated part 34 Planar laminated part 41 Hood part 42 Main cover (upper case)
43 Under cover (lower case)
44 Side wall part 47 Side wall part 45 Welding boss (boss)
46 Welding hole (Fitting hole)

Claims (6)

A bus bar provided with a wiring board, a bus bar body overlaid on the plane of the wiring board, and a tab terminal protruding outward from the edge of the wiring board in the plane direction, and the tab terminal is accommodated The wiring board provided with a cylindrical hood portion to which the mating connector is fitted, and a case for housing the bus bar, and the case has the hood portion in the thickness direction of the wiring board. The upper case and the lower case are divided into upper and lower cases, and one hood portion of the upper case and the lower case is provided with a boss standing toward the other, and the other hood portion of the upper case and the lower case is provided with the boss. In the electrical junction box provided with a fitting hole for fitting
A plurality of the bosses are erected side by side along the edge of the wiring board,
The electrical connection box, wherein the tab terminal is sandwiched between the boss and the boss so that movement of the tab terminal in the arrangement direction of the boss is restricted by the boss. The said bus bar is pinched | interposed between the side wall part and the said wiring board which stand in the thickness direction of the said wiring board toward the other from one side of the said upper case and a lower case. The electrical junction box according to 1. The said bus bar is bent in the shape of a crank so that the side surface laminated part overlaid on the side surface of the said wiring board may be provided between the said bus bar main body and the said tab terminal. Electrical connection box as described in. The electrical junction box according to claim 3, wherein the side surface laminated portion is sandwiched between a side wall portion provided in the case and the wiring board. A protrusion is provided on the side surface of the wiring board,
The bus bar is provided with a planar laminated portion that is superimposed on the plane of the protruding portion between the side laminated portion and the tab terminal,
The electrical junction box according to claim 4, wherein the planar laminated portion is sandwiched between a side wall portion sandwiching the side surface laminated portion and the protrusion. The bus bars are respectively stacked on a pair of planes facing in the thickness direction of the wiring board,
On the plane on the upper case side of the protrusion, a plane laminated portion of a bus bar that is superimposed on the plane on the upper case side is overlaid,
The electrical connection box according to claim 5, wherein a planar laminated portion of a bus bar that is overlaid on the plane on the lower case side is overlaid on the plane on the lower case side of the protrusion.

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