JP2017152101A - Control board and electric connection box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control board which can be used for both of a control component unit and an electric connection box, and also to provide, with the use of the control board, a compact electric connection box with high shape flexibility.SOLUTION: A control board 1 comprises: first and second circuit boards 3, 5 bendably connected to each other via a flat circuit body 11; control components 7 mounted on the first and second circuit boards 3, 5; and a terminal connection part 4 electrically connected to the control components 7. The terminal connection part 4 has the same connection pattern as those of a terminal block in a connector fitting portion of a control component unit and a terminal block in an internal circuit body of an electric connection box.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a control board and an electrical junction box.

  Conventionally, an electric connection box such as a power distribution box is used in a vehicle such as an automobile in order to efficiently distribute power from a battery to various electrical devices. Such an electrical junction box includes a bus bar circuit and a printed wiring circuit of a printed circuit board to form an internal circuit body (see, for example, Patent Document 1).

  By the way, it is necessary for the electrical junction box mounted on the vehicle to cope with the presence or absence of functional parts depending on the vehicle type and grade. In the conventional electrical junction box, in such a case, a function component is retrofitted. Such functional components are retrofitted by adding a control component unit to the electrical junction box for each functional component or mounting a functional component control component unit having a high mounting rate on the electrical junction box.

  For example, the case main body 503 of the conventional power distribution box 501 shown in FIG. 9 is provided with a connector connecting portion 505, and a functional component (not shown) that is retrofitted to the internal circuit body in the case main body 503. The control component unit 507 connected to the wire harness 509 is additionally connectable. The control component unit 507 has a connector fitting portion into which the connector of the wire harness 509 is fitted, and includes a housing 508 that houses an additional control circuit for a functional component to be retrofitted.

  Further, in the conventional power distribution box 521 shown in FIG. 10, the internal circuit component 531 mounted in the case body 523 includes a standard control circuit 525 for standard electrical equipment and a functional component (not shown). And the additional control circuit 527 for the above-described configuration is formed of an integrated circuit board.

JP20121655592A

  However, when the control component unit 507 is connected to the connector connection portion 505 of the case body 503 as in the power distribution box 501 shown in FIG. The conversion connector 511 and the connecting wire harness are required, which increases the number of parts. In addition, in the vertical direction or the horizontal direction of the case main body 503, a space for mounting the control component unit 507 is separately required, and there is a problem that the outer shape of the power distribution box 501 is increased.

  On the other hand, when the additional control circuit 527 for the functional component to be retrofitted is integrated with the standard control circuit 525 for the standard electrical equipment as in the power distribution box 521 shown in FIG. The board area of the component 531 increases and the yield of circuit boards deteriorates, and the internal circuit component 531 of the power distribution box 521 needs to be dedicated for each vehicle specification, and the additional control circuit 527 is transferred to another vehicle. There is a problem that it cannot be diverted.

  The present invention has been made in view of the above situation, and the object thereof is a control board that can be used both as a control component unit and an electrical connection box, and a compact electrical connection with a high degree of freedom in shape using the control board. To provide a box.

The above object of the present invention is achieved by the following configuration.
(1) A control board comprising a plurality of circuit boards that are foldably connected by a flat circuit body, a control component mounted on the circuit board, and a terminal connection portion electrically connected to the control component. The terminal connection part has a connection pattern that is the same as the connection pattern of the terminal group in the connector fitting part of the control component unit and the connection pattern of the terminal group in the internal circuit body of the electrical connection box, Control board.

According to the control board having the configuration of (1) above, the control board having the same connected pattern as the connection pattern of each terminal group can be used both as a control component unit and an electrical connection box, and is easy to use properly. The degree of freedom when mounted on a vehicle can be increased.
In addition, the said control board at the time of comprising a control component unit can be laid out compactly around a connector fitting part by arrange | positioning and arrange | positioning a several circuit board by a flat circuit body. Moreover, the said control board at the time of comprising an electrical junction box can suppress the height of an internal circuit body by arrange | positioning a some circuit board horizontally, without bending a flat circuit body.
Thus, for example, when there is a sufficient mounting space in the engine room, the control board is mounted in the electrical junction box. If sufficient space is not available in the engine room, the control board is mounted on the control component unit as a single-part component form, and this control component unit is mounted on the space in the vehicle.

(2) The control board configured as described in (1) above is electrically connected to a terminal group in the internal circuit body in a state where the plurality of circuit boards are arranged horizontally without being bent by the flat circuit body. An electrical junction box characterized by.

According to the electrical junction box having the configuration of (2) above, since the control board without an exterior is directly connected to the internal circuit body, the conventional control component unit is connected to the internal circuit body via the conversion connector. Compared with, the outer shape of the electrical junction box can be reduced.
Moreover, the cost of the electric junction box can be reduced by sharing with the control board for constituting the control component unit.

(3) A control component unit, wherein the control board having the configuration of (1) is electrically connected to a terminal group in a connector fitting portion in a state of being bent by the flat circuit body.

  According to the control component unit having the configuration (3), the cost of the control component unit can be reduced by using the control substrate also as the control substrate for configuring the electrical connection box.

According to the control board according to the present invention, the control board can be used as the control component unit and the electrical junction box.
Moreover, according to the electrical junction box of the present invention, a compact electrical junction box having a high degree of freedom in shape can be provided using the control board.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

1 is an overall perspective view of a control board according to a first embodiment of the present invention. It is a perspective view which shows the state before connecting the control board shown in FIG. 1 to the terminal group in the connector fitting part of a control component unit. It is a perspective view which shows the state before a case cover is mounted | worn with the control component unit to which the control board was connected. It is a perspective view which shows the state before the connector of the functional component attached later is fitted to the connector fitting part of the control component unit shown in FIG. It is a perspective view which shows the state before the connector of the functional component retrofitted is fitted by the connector fitting part of the internal circuit body of the electrical junction box in which the control board shown in FIG. 1 was mounted. It is a VI-VI cross-sectional arrow view in FIG. It is a VII-VII cross-sectional arrow view in FIG. It is a whole perspective view of a control board concerning a 2nd embodiment of the present invention. It is a principal part expansion perspective view which shows the state before a control component unit is connected to the connector connection part of the conventional electrical junction box. It is a principal part expanded sectional view which shows the internal circuit structure of the conventional electrical junction box.

Embodiments according to the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the control board 1 according to the first embodiment of the present invention includes a plurality of (two in the present embodiment) first and second circuits that are foldably connected by a flat circuit body 11. A plurality of control components 7 mounted on the substrates 3 and 5, the first and second circuit substrates 3 and 5, and a terminal connection portion 4 electrically connected to the control component 7 by a printed circuit (not shown); I have.
The control component 7 according to the present embodiment is, for example, an FET (field effect transistor), a diode, a capacitor, or the like that constitutes an electronic control unit for controlling an auxiliary device that is selectively retrofitted to an attachment target vehicle. .

  Further, the plurality of through holes 6 constituting the connected pattern in the terminal connection portion 4 are connected to the connection pattern of the terminal group 8 including the plurality of tab terminals 25 in the connector fitting portion 26 of the control component unit 30 (see FIG. 2). ) And the same arrangement pattern as the connection pattern (see FIG. 7) of the terminal group 58 composed of the plurality of tab terminals 61 in the internal circuit body 60 of the electrical connection box 51.

  The first and second circuit boards 3 and 5 made of a rectangular printed board are arranged with a predetermined gap d. The first circuit board 3 and the second circuit board 5 are foldably connected by a flat circuit body 11. The flat circuit body 11 is, for example, a flexible printed circuit board or a flexible flat cable in which a predetermined circuit pattern is formed on an insulating sheet, and is mounted on the first and second circuit boards 3 and 5. It is electrically connected to a predetermined control component 7 and board circuit pattern. Further, fixing through holes 9 are provided at the corners of the first and second circuit boards 3 and 5.

Next, an assembly procedure of the control component unit 30 using the control board 1 will be described with reference to FIGS.
The control component unit 30 according to the present embodiment is a so-called semiconductor power integration, and includes a substrate assembly 21 in which the first and second circuit boards 3 and 5 on which the control component 7 is mounted are fixed to the terminal block 23. , A small electrical connection box configured to include a cover case 31 that accommodates these.

  As shown in FIG. 2, the terminal block 23 integrally formed of an insulating resin material is fitted with a power connector to which a connector 43 connected to one end of a power harness 45 connected to the power source side such as a battery or an alternator is fitted. And a connector fitting portion 26 into which the connector 41 connected to one end of the wire harness 47 connected to the auxiliary device is fitted (see FIG. 4).

The connector fitting portion 26 is configured such that rear ends (lower ends in FIG. 2) of the plurality of tab terminals 25 press-fitted and fixed to the terminal block 23 protrude into the connector housing chamber 22 of the terminal block 23. The terminal group 8 in the connector fitting portion 26 is configured such that the tips (upper ends in FIG. 2) of the plurality of tab terminals 25 protrude from one outer side surface (upper surface in FIG. 2) of the terminal block 23. It has a predetermined connection pattern.
The power connector fitting portion 28 is configured by a rear end of the power terminal 24 press-fitted and fixed to the terminal block 23 protruding into a power connector housing chamber provided adjacent to the connector housing chamber 22.

As shown in FIG. 3, the first and second circuit boards 3 and 5 bent in an L-shaped cross section are connected to one outer surface of the terminal block 23 and another outer surface that intersects the one outer surface. The substrate assembly 21 is configured by being fixed along the outer surface.
At this time, the first circuit board 3 is mounted on one outer surface of the terminal block 23 such that each through hole 6 of the terminal connection portion 4 is inserted into each tab terminal 25 of the terminal group 8 in the terminal block 23. The fixing screw 39 that is placed and penetrates through the through hole 9 is screwed into the fixing hole 27 to be fixed to the terminal block 23. Then, the tab terminal 25 is soldered to the terminal connection portion 4 by the printed circuit through the through hole 6.
Further, the second circuit board 5 is fixed to the terminal block 23 by being screwed into the fixing hole 27 with the fixing screw 39 penetrating the through hole 9 in a state along the other outer surface of the terminal block 23. .

  Therefore, the control board 1 when constructing the board assembly 21 is such that the two first and second circuit boards 3 and 5 are bent by the flat circuit body 11 into an L-shaped cross section and the periphery of the connector fitting portion 26. As a result, the terminal block 23 is compactly laid out.

  Next, the assembly of the control component unit 30 is completed by accommodating the board assembly 21 in the rectangular parallelepiped cover case 31. At this time, the cover case 31 is fixed to the terminal block 23 by the corresponding locking holes 35 of the case body 33 being locked to the locking protrusions 29 protruding from the pair of side surfaces of the terminal block 23.

As shown in FIG. 4, the connector 43 connected to one end of the power harness 45 is fitted to the power connector fitting portion 28 of the control component unit 30, and the connector fitting portion 26 is connected to the auxiliary connector fitting 26. The connector 41 of the wire harness 47 connected to the machine device is fitted.
As shown in FIG. 6, the control component unit 30 according to the present embodiment can reduce the outer shape by bending the control board 1 into an L-shaped cross section and arranging it compactly around the connector fitting portion 26. And miniaturization can be achieved.

Next, an electrical junction box 51 using the control board 1 will be described with reference to FIGS.
The electrical connection box 51 according to the present embodiment is a power distribution box for efficiently distributing the power from the battery to various electrical devices.
As shown in FIG. 5, the electrical connection box 51 accommodates the internal circuit body 60 in the accommodation space defined by the upper case 55 and the lower case 56. The internal circuit body 60 has a structure in which a plurality of bus bar circuit bodies 62 and a printed board 63 are stacked.

  A plurality of connector fitting portions 53 into which the connectors 57 of wire harnesses connected to various types of electrical equipment are fitted are provided on the upper surface and side surfaces of the electrical connection box 51 and connected to the power connector fitting portion 65. The power from the power harness is distributed to various electrical devices via the internal circuit body 60.

Then, the control board 1 is fixed to the upper case 55 in a state where the first and second circuit boards 3 and 5 are horizontally arranged without being bent by the flat circuit body 11, whereby the bus bar circuit of the internal circuit body 60. It is electrically connected to a terminal group 58 in the body 62.
At this time, the first circuit board 3 is fixed to the upper case 55 such that each through hole 6 of the terminal connection portion 4 is inserted into each tab terminal 61 of the terminal group 58 in the bus bar circuit body 62.

When the control board 1 is accommodated in the electrical connection box 51, the two first and second circuit boards 3 and 5 are arranged horizontally without bending the flat circuit body 11, thereby the internal circuit body 60. Can be suppressed.
Therefore, according to the electrical connection box 51 according to the present embodiment, the control board 1 without an exterior is directly connected to the bus bar circuit body 62 of the internal circuit body 60, so that the conventional control component unit 507 is connected via the conversion connector 511. Thus, the outer shape of the electric connection box 51 can be made smaller than that of the power distribution box 501 connected to the internal circuit body.

  5 and 7, a connector fitting portion 59 is provided on the side wall of the upper case 55, and the tips of the plurality of tab terminals 61 protrude into the connector housing chamber 54 of the connector fitting portion 59. By doing so, it can also comprise so that the connector 41 of the wire harness 47 may be fitted.

  As described above, according to the control board 1 according to the first embodiment, the control board 1 having the same connected pattern as the connection patterns of the terminal groups 8 and 58 in the control component unit 30 and the electrical connection box 51 is: Since the control component unit 30 and the electrical junction box 51 can be used together and can be used properly, the degree of freedom when mounted on the vehicle can be increased.

That is, for example, when there is a sufficient mounting space in the engine room, the control board 1 is mounted on the electrical connection box 51.
If sufficient space is not available in the engine room, the control board 1 is mounted on the control component unit 30 as a single-part component form, and the control component unit 30 is mounted in a space in the vehicle. And it can also be set as the form which electrically connects the control component unit 30 in a vehicle, and the electrical junction box in an engine room by the wire harness which has a connector in both ends.
Furthermore, since the control board 1 is also used as the control component unit 30 and the electrical connection box 51, the cost of the control component unit 30 and the electrical connection box 51 can be reduced as well as the control board 1 itself.

The control board of the present invention is not limited to the configuration of the control board 1 including the first and second circuit boards 3 and 5 that are foldably connected by the flat circuit body 11. Needless to say, various forms in which three or more circuit boards are foldably connected by a flat circuit body can be adopted.
For example, the control board 71 according to the second embodiment of the present invention shown in FIG. 8 includes three first to third circuit boards 73, 75, 77 that are foldably connected by the flat circuit body 11. ing. In addition, about the component similar to the control board 1 of the said 1st Embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  As shown in FIG. 7, the first to third circuit boards 73, 75, 77 made of a rectangular printed board are arranged with a predetermined gap d therebetween. Between the first circuit board 73 and the second circuit board 75 and between the second circuit board 75 and the third circuit board 77, the flat circuit body 11 is foldably connected.

  For example, when the first to third circuit boards 73, 75, 77 are assembled to the terminal block 23, the first to third circuit boards 73, 75 in a state of being bent into a U-shaped cross section. , 77 are fixed along one outer side surface of the terminal block 23 and a pair of outer side surfaces intersecting with the one outer side surface to constitute a board assembly.

  Therefore, in the control board 71 when the board assembly is configured, the three first to third circuit boards 73, 75, 77 are bent into the U-shaped cross section by the flat circuit body 11, and the connector fitting portion 26 ( 2), the terminal block 23 is compactly laid out.

Therefore, according to the control boards 1 and 71 according to the present embodiment, the control boards 1 and 71 can be used as the control component unit 30 and the electrical connection box 51.
Moreover, according to the electrical junction box 51 according to the present embodiment, a compact electrical junction box having a high degree of freedom in shape can be provided using the control boards 1 and 71.

Here, the features of the above-described embodiment of the control board and the electrical junction box according to the present invention will be briefly summarized and listed below.
[1] A plurality of circuit boards (first to third circuit boards 3, 5; 73, 75, 77) connected to be foldable by a flat circuit body (11), and control components mounted on the circuit board (7) and a terminal board (4) electrically connected to the control component, a control board (1, 71) comprising:
The terminal connection portion is a connection pattern of the terminal group (8) in the connector fitting portion (26) of the control component unit (30), and a terminal group (58) in the internal circuit body (60) of the electrical connection box (51). A control board (1, 71) having the same connected pattern as the connection pattern.
[2] The terminal group (58) in the internal circuit body (60) in a state in which the control circuit board (1) according to [1] has the plurality of circuit boards arranged horizontally without being bent by the flat circuit body. An electrical connection box (51) characterized in that the electrical connection box (51) is electrically connected to the electrical connection box.
[3] The control board (1, 71) according to [1] is electrically connected to the terminal group (8) in the connector fitting portion (26) in a state where the control board (1, 71) is bent by the flat circuit body (11). Control component unit (30), characterized in that

In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.
For example, the terminal connection part 4 by the above-described printed circuit is not limited to soldering with the tab terminals 25 and 61 via the through-hole 6 of the present embodiment, but a terminal connection structure using a press fit, or for board mounting. It goes without saying that various connection structures such as a terminal connection structure using a plurality of lands can be adopted.

1 ... Control board 3 ... First circuit board (circuit board)
4 ... terminal connection 5 ... second circuit board (circuit board)
6 ... Through hole 7 ... Control part 8,58 ... Terminal group 11 ... Flat circuit body 26 ... Connector fitting part 30 ... Control part unit 51 ... Electric junction box 60 ... Internal circuit body

Claims (3)

A control board comprising a plurality of circuit boards foldably connected by a flat circuit body, a control component mounted on the circuit board, and a terminal connection portion electrically connected to the control component. ,
The control board, wherein the terminal connection portion has a connection pattern that is the same as a connection pattern of a terminal group in a connector fitting portion of a control component unit and a connection pattern of a terminal group in an internal circuit body of an electric connection box.   The control board according to claim 1 is electrically connected to a terminal group in the internal circuit body in a state where the plurality of circuit boards are horizontally arranged without being bent by the flat circuit body. Electrical junction box.   The control component unit according to claim 1, wherein the control board is electrically connected to a terminal group in a connector fitting portion in a state where the control board is bent by the flat circuit body.

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