JP6656017B2 - Control board and electrical connection box - Google Patents

Description

  The present invention relates to a control board and an electric connection box.

  2. Description of the Related Art Conventionally, an electric connection box such as a power distribution box has been used in vehicles such as automobiles in order to efficiently distribute power from a battery to various electric devices. Such an electrical junction box has an internal circuit body including a bus bar circuit and a printed wiring circuit on a printed circuit board (for example, see Patent Document 1).

  By the way, the electrical junction box mounted on the vehicle needs to cope with the presence or absence of a functional component depending on the type and grade of the vehicle. In a conventional electric junction box, such a case is dealt with by retrofitting a functional component. Such retrofitting of the functional components is performed by additionally connecting a control component unit to the electric connection box for each functional component, or mounting a control component unit of a functional component having a high mounting rate on the electric connection box.

  For example, the case main body 503 of the conventional power distribution box 501 shown in FIG. 9 is provided with a connector connection portion 505, and a functional component (shown in FIG. 9) is attached to an internal circuit body in the case main body 503. The control component unit 507 connected to the wire harness 509 in FIG. 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 accommodates an additional control circuit for a functional component to be retrofitted.

  In the conventional power distribution box 521 shown in FIG. 10, an internal circuit component 531 mounted in a case main body 523 is provided with a standard control circuit 525 for standard electrical equipment and a functional component (shown in FIG. And an additional control circuit 527 are formed on an integrated circuit board.

JP 2012-165592 A

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

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

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a control board that can also be used as a control component unit and an electrical connection box, and a compact electrical connection having a high degree of freedom in shape using the control board. Is to provide boxes.

The above object according to the present invention is achieved by the following configurations.
(1) A control board comprising: a plurality of circuit boards that are flexibly connected by a flat circuit body; a control component mounted on the circuit board; and a through hole that is electrically connected to the control component. there are, the through holes, possess arrangement pattern of a plurality of tab terminals, and the same arrangement pattern as the arrangement pattern of a plurality of tab terminals in the internal circuit of the electrical connection box in the connector fitting portion of the control part unit, the A control board, which can be used for both a control component unit and the electric connection box .

According to the control board having the configuration of the above (1), the control board having the same connection pattern as the connection pattern of each terminal group can be used for both the control component unit and the electric connection box. The degree of freedom when mounted on a vehicle can be increased.
Note that the control board when configuring the control component unit can be compactly laid out around the connector fitting portion by arranging a plurality of circuit boards by bending them with a flat circuit body. Further, the control board when configuring the electric connection box can suppress the height of the internal circuit body by arranging a plurality of circuit boards horizontally without bending the flat circuit body.
Thus, for example, when there is a sufficient mounting space in the engine room, the control board is mounted on the electric connection box. If a sufficient space cannot be secured in the engine room, the control board is mounted on the control component unit as a single-part configuration, and the control component unit is mounted in a space inside the vehicle.

(2) With the control board having the configuration of (1), the plurality of circuit boards are horizontally arranged without being bent by the flat circuit body, and the plurality of tab terminals in the internal circuit body of the electric connection box are electrically connected. An electrical junction box, which is electrically connected.

According to the electric connection box having the configuration (2), since the control board without the exterior is directly connected to the internal circuit, the conventional control component unit is connected to the internal circuit via the conversion connector. The outer shape of the electric junction box can be made smaller than that of the electric junction box.
Further, by also using the control board for constituting the control component unit, the cost of the electric connection box can be reduced.

(3) The control board having the configuration of (1) is electrically connected to a plurality of tab terminals in a connector fitting portion of the control component unit in a state where the control board is bent by the flat circuit body. Control component unit.

  According to the control component unit having the configuration (3), the control board is also used as a control board for forming the electric connection box, so that the cost of the control component unit can be reduced.

ADVANTAGE OF THE INVENTION According to the control board which concerns on this invention, a control board can also be used for a control component unit and an electric connection box.
Further, 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, details of the present invention will be further clarified by reading through embodiments for carrying out the invention described below (hereinafter, referred to as “embodiments”) with reference to the accompanying drawings. .

FIG. 2 is an overall perspective view of a control board according to the first embodiment of the present invention. FIG. 2 is a perspective view showing a state before connecting the control board shown in FIG. 1 to a terminal group in a connector fitting portion of a control component unit. FIG. 5 is a perspective view showing a state before a case cover is attached to a control component unit to which a control board is connected. FIG. 4 is a perspective view showing a state before a connector of a functional component to be attached later is fitted to a connector fitting portion of the control component unit shown in FIG. 3. FIG. 2 is a perspective view showing a state before a connector of a functional component to be retrofitted is fitted into a connector fitting portion of an internal circuit body of the electric connection box on which the control board shown in FIG. 1 is mounted. FIG. 6 is a sectional view taken along the line VI-VI in FIG. 4. FIG. 7 is a sectional view taken along a line VII-VII in FIG. 5. FIG. 7 is an overall perspective view of a control board according to a second embodiment of the present invention. It is a principal part expansion perspective view which shows the state before the control component unit is connected to the connector connection part of the conventional electric connection box. It is a principal part expanded sectional view which shows the internal circuit structural body of the conventional electrical junction box.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, a control board 1 according to a first embodiment of the present invention includes a plurality of (two in this embodiment) first and second circuits connected to be freely bent by a flat circuit body 11. Boards 3, 5; a plurality of control components 7 mounted on the first and second circuit boards 3, 5; and a terminal connection portion 4 electrically connected to the control components 7 by a printed circuit (not shown). Have.
Note that the control component 7 according to the present embodiment is, for example, an FET (field effect transistor), a diode, a capacitor, and the like that constitute an electronic control unit for controlling an auxiliary device that is selectively retrofitted to a vehicle to be mounted. .

  Further, the plurality of through holes 6 forming 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 a connection pattern (see FIG. 7) of a terminal group 58 including a plurality of tab terminals 61 in the internal circuit body 60 of the electric 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 therebetween. 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 having a predetermined circuit pattern 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 a 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 assembling 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 board assembly 21 in which first and second circuit boards 3 and 5 on which the control component 7 is mounted are fixed to a terminal block 23. , A cover case 31 for accommodating them.

  As shown in FIG. 2, a terminal block 23 integrally formed of an insulating resin material is fitted with a power supply connector into which a connector 43 connected to one end of a power supply harness 45 connected to a power supply side such as a battery or an alternator is fitted. It has a mating portion 28 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 formed by projecting rear ends (lower ends in FIG. 2) of the plurality of tab terminals 25 press-fitted and fixed to the terminal block 23 into the connector accommodating chamber 22 of the terminal block 23. The terminal group 8 in the connector fitting portion 26 is formed by projecting the tip ends (upper ends in FIG. 2) of the plurality of tab terminals 25 from one outer surface (upper surface in FIG. 2) of the terminal block 23. It has a predetermined connection pattern.
The power supply connector fitting portion 28 is configured by projecting a rear end of the power supply terminal 24 press-fitted and fixed to the terminal block 23 into a power supply connector storage chamber adjacent to the connector storage chamber 22.

Then, as shown in FIG. 3, the first and second circuit boards 3, 5 in a state of being bent into an L-shaped cross section are provided with one outer surface of the terminal block 23 and another intersecting with the one outer surface. The substrate assembly 21 is configured by being fixed along the outer side 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 which is placed and penetrates 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 part 4 by the printed circuit via 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 of being along the other outer surface of the terminal block 23. .

  Accordingly, when the control board 1 constituting the board assembly 21 is formed, the two first and second circuit boards 3 and 5 are bent into an L-shaped cross section by the flat circuit body 11 so as to surround the connector fitting portion 26. , The terminal block 23 is laid out compactly.

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

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

Next, an electric connection box 51 using the control board 1 will be described with reference to FIGS.
The electric connection box 51 according to the present embodiment is a power distribution box for efficiently distributing power from a battery to various electric devices.
As shown in FIG. 5, the electric connection box 51 houses the internal circuit body 60 in a housing 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 circuit board 63 are stacked.

  A plurality of connector fitting portions 53 into which connectors 57 of wire harnesses connected to various electrical devices are fitted are provided on the upper surface and side surfaces of the electric connection box 51, and are connected to the power connector fitting portion 65. Power from the supplied power harness is distributed to various electric 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, so that the bus bar circuit of the internal circuit body 60 is formed. It is electrically connected to a terminal group 58 on 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 housed in the electrical junction box 51, the internal circuit body 60 is formed by arranging the two first and second circuit boards 3 and 5 horizontally without bending the flat circuit body 11. Height can be suppressed.
Therefore, according to the electric connection box 51 according to the present embodiment, the control board 1 without the 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.

  As shown by imaginary lines in FIGS. 5 and 7, a connector fitting portion 59 is provided on the side wall of the upper case 55, and tips of the plurality of tab terminals 61 project into the connector accommodating chamber 54 of the connector fitting portion 59. By doing so, the connector 41 of the wire harness 47 can be configured to be fitted.

  As described above, according to the control board 1 according to the first embodiment, the control board 1 having the same connection pattern as the connection pattern of each of the terminal groups 8 and 58 in the control component unit 30 and the electric connection box 51 includes: Since the control component unit 30 and the electric connection box 51 can be used in common and can be easily used properly, the degree of freedom when mounted on a 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 electric connection box 51.
When a sufficient space cannot be secured in the engine room, the control board 1 is mounted on the control component unit 30 as a single-part configuration, and the control component unit 30 is mounted in a space or the like in the vehicle. Then, the control component unit 30 in the vehicle and the electric connection box in the engine room can be electrically connected by a wire harness having connectors at both ends.
Further, since the control board 1 is also used for the control component unit 30 and the electric connection box 51, not only the control board 1 itself but also the cost of the control component unit 30 and the electric connection box 51 can be reduced.

Note that the control board of the present invention is not limited to the configuration of the control board 1 including the two first and second circuit boards 3 and 5 which are connected by the flat circuit body 11 so as to be freely bent. Needless to say, various forms in which three or more circuit boards are freely bent and 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, and 77 foldably connected by the flat circuit body 11. ing. The same components as those of the control board 1 of the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

  As shown in FIG. 7, the first to third circuit boards 73, 75, and 77 each formed of a rectangular printed board are arranged with a predetermined gap d therebetween. The flat circuit body 11 is connected 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 so as to be freely bent.

  When the first to third circuit boards 73, 75, 77 are assembled to the terminal block 23, for example, 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 outside surface of the terminal block 23 and a pair of outside surfaces intersecting the one outside surface, thereby forming a board assembly.

  Therefore, the control board 71 when configuring the board assembly is configured such that three first to third circuit boards 73, 75, and 77 are bent into a 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 shared by the control component unit 30 and the electric connection box 51.
Further, 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 embodiments of the control board and the electric connection 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 by a flat circuit body (11) so as to be freely bendable, and control components mounted on the circuit boards (7) A control board (1, 71) comprising: a terminal connection portion (4) electrically connected to the control component;
The terminal connection part is a connection pattern of the terminal group (8) in the connector fitting part (26) of the control component unit (30) and a terminal group (58) in the internal circuit body (60) of the electric connection box (51). A control board (1, 71) having the same connection pattern as the connection pattern of (1).
[2] A terminal group (58) in the internal circuit body (60) in a state where the control board (1) according to the above [1] has the plurality of circuit boards arranged horizontally without being bent by the flat circuit body. An electric connection box (51), which is electrically connected to the electric 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). A control component unit (30) characterized in that:

Note that the present invention is not limited to the above-described embodiment, and can be appropriately modified and improved. In addition, the material, shape, size, 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 portion 4 formed by the above-described printed circuit is not limited to the soldering with the tab terminals 25 and 61 through the through holes 6 of the present embodiment, but may be a terminal connection structure using press-fit or a board mounting structure. 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 part 5: Second circuit board (circuit board)
Reference Signs List 6 through hole 7 control parts 8, 58 terminal group 11 flat circuit body 26 connector fitting part 30 control part unit 51 electric connection box 60 internal circuit body

Claims (3)

A plurality of circuit boards that are foldably connected by a flat circuit body, a control component mounted on the circuit board, and a through hole that is electrically connected to the control component.
The through holes, possess arrangement pattern of a plurality of tab terminals, and the same arrangement pattern as the arrangement pattern of a plurality of tab terminals in the internal circuit of the electrical connection box in the connector fitting portion of the control part unit,
A control board, which can be used as both the control component unit and the electric connection box . The control board according to claim 1, wherein the plurality of circuit boards are horizontally arranged without being bent by the flat circuit body, and are electrically connected to a plurality of tab terminals in an internal circuit body of the electric connection box. An electrical junction box, characterized in that: A control component unit , wherein the control board according to claim 1 is electrically connected to a plurality of tab terminals in a connector fitting portion of the control component unit in a state of being bent by the flat circuit body. .

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