JP2006164537A - Ecu substrate connection structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ECU substrate connection structure that is arranged so that a plurality of ECU substrates are laminated, reduces the installation space of the ECU substrates, can collectively connect respective ECU substrates, greatly reduces the number of connectors by connecting a wiring harness for each wiring system to a terminal connection section arranged while being classified for each wiring system, and can be wired easily. <P>SOLUTION: A connection substrate 23 has a terminal connection section 29b that is electrically connected to an electric circuit pattern 29, classified for each wiring system of a connection section 27 of the ECU substrate 21 to which a pad 29a is connected, and arranged aggregated at each wiring system. In the ECU substrate connection structure, base boards 25 are arranged with gaps between them so that a plurality of the ECU substrates 21 are laminated while through holes 25a are aligned, and the connection substrate 23 is inserted into the through holes 25a so that the pad 29a of the connection substrate 23 collectively comes into contact with the connection section 27 of the plurality of ECU substrates 21 for electrical connection. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a connection structure for an ECU board (that is, an electronic control unit board), and more specifically, an ECU board connection for electrically connecting a plurality of ECU boards arranged at intervals so as to be stacked. Concerning structure.

  A vehicle such as an automobile has a large number of electrical components and an electronic control unit that controls the electrical components (hereinafter referred to as “electronic control unit” or abbreviated as “ECU”) dispersedly mounted on each part. Yes. In each ECU, an electric circuit board (in other words, an ECU board) on which the ECU is mounted is individually housed in a housing case and appropriately disposed in each part of the vehicle. ECUs tend to increase with the increase in added value of vehicles such as automobiles, so the installation space of the ECU increases, the number of connectors for connecting these electrical components and the wiring harnesses, and the number of connectors for connecting them. It has increased remarkably. For this reason, the connector fitting and the wiring harness wiring are complicated, and the wiring space is also increased. As described above, the space required for installing the ECU continues to increase with the increasing value added of vehicles such as automobiles.

  On the other hand, there is a strong demand to widen the vehicle interior space so that a comfortable vehicle interior space can be provided, and there is a conflict between the securing of the vehicle interior space and the installation space for the ECU and the wiring harness securing space. There is an urgent need to resolve it.

  Conventionally, a plurality of ECU boards are arranged in a stacked state, and adjacent ECU boards are connected by an inter-board connector. Specifically, as shown in FIG. 12, a male inter-board connector 6 and a female inter-board connector 7 are provided on the first ECU board 1 and the second ECU board 2, respectively. A plurality of ECU boards 1 and 2 that are fitted and integrated and connected to reduce the installation space is known.

Also, there is known an ECU central storage box in which a plurality of ECU boards are stacked and accommodated in a case to reduce the installation space of the ECU (see Patent Document 1). The ECU central storage box accommodates a plurality of ECU boards in a stacked state in the case, and connects a bus bar to a conductor end formed at one end of each ECU board, and the bus bar serves as a common circuit for each ECU board. A battery circuit, an accessory circuit, an ignition circuit, and a ground circuit are configured, and common circuits of a plurality of ECU boards are connected together. Moreover, the direct attachment connector connected to the connector of the wire harness routed by each part is being fixed to the other end of each ECU board | substrate.
JP 2003-304083 A (page 5-6, FIG. 1)

  According to the ECU boards arranged as shown in FIG. 12 and connected to each other by the board-to-board connectors, the interval between adjacent ECU boards (in other words, the integration density of the ECU boards) is limited by the height of the board-to-board connectors. Therefore, even if the height of the electronic component mounted on the ECU board is low, the electronic component cannot be placed closer to it. That is, it is not possible to sufficiently reduce the installation space for the ECU board by reducing the interval between the ECU boards.

  The ECU centralized storage box disclosed in Patent Document 1 houses a plurality of ECU boards in a stacked state in a case and connects each ECU board with a bus bar to form a common circuit. Accordingly, there is an effect of reducing the installation space and the number of connection connectors as compared with the case where ECUs are arranged in a distributed manner and the ECUs are connected by wire harnesses. However, as shown in FIG. 13, when the wiring harness of one routing system is connected to a plurality of ECU boards (the same control signal is used for a plurality of controls, such a connection is usually made). In spite of the same wiring system, there is a problem that a large number of connectors are required for connection to each ECU board. In addition, this makes the connector connection complicated and requires a lot of man-hours for connector connection, and there is a risk of erroneous connection (incorrect wiring). Also, the wire harness is complicated to be branched into a plurality of connectors and is difficult to manufacture.

  Specifically, as shown in FIG. 13, for example, an instrument panel system wire harness 10 is connected to three ECU boards of a first ECU board 1, a second ECU board 2, and a third ECU board 3, and a floor system The wire harness 11 is connected to two ECU boards of the second ECU board 2 and the third ECU board 3, and the wire harness 12 of the engine main system is connected to three pieces of the second ECU board 2, the third ECU board 3 and the fourth ECU board 4. Connected to the ECU board. Therefore, the ECU boards 1, 2, 3, 4 and the wire harnesses 10, 11, 12 need to be provided with connectors, respectively, and not only the number of connectors is increased, but also the trouble of searching for and connecting connectors to be fitted together. Connection work is required.

  Further, in order to facilitate such complicated connection work, as shown in FIG. 14, when connectors 13, 14, 15 of wire harnesses 10, 11, 12 of different systems are connected to the same ECU board 5. In addition, it has been proposed that the connectors 13, 14, and 15 are fitted into the connector case 16 so that they are combined and connected to the ECU board 5 in a lump. However, the number of connectors of the wire harnesses 10, 11, 12 and the ECU board 5 is not reduced by this, and a new operation for assembling the connectors 13, 14, 15 to the connector case 16 in the assembly line is generated. As a result, further improvements were desired.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to arrange a plurality of ECU boards so as to reduce the installation space of the ECU boards and to collectively connect the ECU boards. ECUs that can be connected to each other and connected to wire harnesses for each wiring system in the terminal connection parts that are classified and arranged according to the wiring system, greatly reducing the number of connectors and enabling easy wiring It is to provide a substrate connection structure.

In order to achieve the above-described object, an ECU board connection structure according to the present invention is characterized by the following (1), (2), (3), (4), and (5).
(1) A base board having a circuit pattern, a through hole penetrating the base board, an electronic control unit mounted on the base board so as to be electrically connected to the circuit pattern, and an electric circuit connected to the circuit pattern A plurality of ECU boards that are connected to each other and extended to the through hole,
An electrical circuit pattern, a plurality of pads formed on the electrical circuit pattern for electrical connection to the connection part of the ECU board, and the pad electrically connected to the electrical circuit pattern A connection board having a terminal connection part arranged collectively for each wiring system while being classified for each wiring system of the connection part of the ECU board,
The base boards are arranged at intervals so that a plurality of the ECU boards are stacked while the through holes are aligned, and the connection board is inserted into each of the through holes, whereby the connection The pads on the board are collectively connected to the connection parts of the plurality of ECU boards.
(2) The connection board of the ECU board connection structure having the configuration of (1) is a multilayer board formed by laminating electric circuit patterns in a plurality of layers.
(3) The ECU board connection structure configured as described in (1) or (2) is arranged so that the connection portion partially protrudes from the inner peripheral surface of the base board forming the through hole into the through hole. A conductive elastic member.
(4) The connection part of the ECU board connection structure configured as described in (1) or (2) is a hollow connector, and the hollow connector defines a frame-shaped housing in which an insertion hole is formed and the insertion hole. It has an electrical contact portion arranged so as to protrude from the inner peripheral surface of the frame-shaped housing into the insertion hole, and is fixed to the base board so that the insertion hole is aligned with the through hole. thing.
(5) The ECU board connection structure according to any one of the above (1) to (4) is configured so that the terminal connection part of the connection board and the electrical components arranged in a distributed manner are independent for each wiring system. And further comprising a plurality of wire harnesses for connection.

According to the ECU board connection structure having the above configuration (1), the base boards are arranged at intervals so that a plurality of ECU boards are stacked while the through holes are arranged, and the through holes are arranged. When the connection board is inserted through, the pads of the connection board are collectively connected to the connection portions of the plurality of ECU boards, so that the connectors of each ECU board can be greatly reduced. Therefore, the connection work of the connection parts of the plurality of ECU boards can be performed in a short time by a simple work of simply inserting the connection board through the through holes of the plurality of ECU boards. In addition, the number of parts (particularly, the number of connectors) can be reduced to reduce manufacturing costs, and the weight of the ECU board can be reduced. As a result, the number of man-hours for routing can be greatly reduced, and erroneous connector fitting, that is, incorrect routing can be reliably prevented, and highly reliable routing can be performed. Note that the effect of reducing the number of parts, the man-hours for the wiring work, and the prevention of incorrect wiring become more remarkable as the number of ECU boards to be connected increases.
In addition, the interval between the ECU boards (base boards) arranged so as to be stacked is such that adjacent ECU boards are connected to each other with an inter-board connector, and the interval between the ECU boards is limited by the height of the inter-board connector. Compared with the electronic control unit, the electronic control unit is limited only by the height of the electronic components, so that the interval between the ECU boards can be arranged as a minimum interval. Therefore, many ECU boards can be concentrated and arranged in a narrow space. As a result, the vehicle interior space can be expanded and a comfortable vehicle interior space can be ensured despite the high functionality.
Furthermore, since the terminal connection parts are classified and grouped for each wiring system and arranged on the connection board, one wire harness prepared for each wiring system is connected to the terminal connection part of the connection board. The wire harness can be connected very simply and in an organized state. Therefore, a complicatedly shaped wire harness in which one wire harness is branched and a plurality of connectors are provided is not necessary, and the production of the wire harness is facilitated. Further, the wiring of one wiring system can be performed very simply by simply connecting one connector to the terminal connection portion of the connection board, and the troublesome connection to each ECU board while dividing a plurality of connectors. Work is lost. Thereby, the incorrect assembly | attachment of a connector is prevented reliably and it can be wired in the state which arranged the wire harness. In addition, since the wire harness is arranged in an organized state, subsequent maintenance is facilitated.
According to the ECU board connection structure configured as described in (2) above, the connection board is constituted by a multilayer board in which electric circuit patterns are laminated in a plurality of layers. Even if a complicated circuit configuration is required to classify, replace the arrangement, and arrange the terminal connection portions in one place collectively for each wiring system, form an electric circuit pattern that satisfies this requirement without any trouble Can do.
According to the ECU board connection structure configured as described above (3), the connection portion is a conductive elastic member arranged so as to partially protrude into the through hole from the inner peripheral surface of the base board forming the through hole. Therefore, the connecting portion can be formed to have a thickness substantially the same as the thickness of the base board. As a result, the connecting portion does not become a restriction on the interval between the ECU boards arranged to be stacked, and a plurality of ECU boards can be arranged at a narrow interval. Further, the structure of the connecting portion is simplified and can be manufactured at low cost. Furthermore, since the pad is pressed by the elastic force of the conductive elastic member, the electrical connection can be reliably maintained even when there is vibration associated with traveling of a vehicle such as an automobile.
According to the ECU board connection structure configured as described in (4) above, the connection portion projects into the insertion hole from the frame-shaped housing in which the insertion hole is formed and the inner peripheral surface of the frame-shaped housing that defines the insertion hole. A hollow connector having an electrical contact portion disposed therein, wherein the hollow connector has its insertion hole aligned with the through hole of the ECU board (that is, while the insertion hole is aligned with the through hole of the ECU board). Therefore, the connection portion can be easily formed using an inexpensive hollow connector by mass-producing and preparing in advance a hollow connector having a shape common to each ECU board.
According to the ECU board connection structure having the configuration of (5) above, the terminal connection parts of the connection boards that are classified and arranged for each wiring system and the electrical components that are dispersedly arranged in each part are respectively connected to the wiring system. Can be connected in a very simple and organized state by simply connecting one wire harness to the terminal connection for each wiring system. it can. Thereby, the incorrect assembly | attachment of a connector can be prevented reliably. Further, since the wire harness is connected in an organized state, subsequent maintenance becomes easy.

  According to the present invention, the number of connectors can be greatly reduced, and many ECU boards can be accommodated in a narrow installation space. In addition, according to the present invention, the wiring harness can be arranged and arranged for each system, so that the wiring is easy and the wiring harness connector can be prevented from being misfitted, so that the wiring is highly reliable. Can be performed.

  The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading through the best mode for carrying out the invention described below with reference to the accompanying drawings.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. A plurality of ECUs equipped with an electronic control unit (ECU) for controlling various electrical components mounted on a vehicle such as an automobile. An ECU board connection structure suitable for electrically connecting boards will be described as an example.

  1 is an exploded perspective view showing an ECU board connection structure according to an embodiment of the present invention, FIG. 2 is an enlarged view of a portion surrounded by an ellipse II in FIG. 1, and FIG. 3 is a portion surrounded by an ellipse III in FIG. FIG. 4 is a perspective view showing a state immediately before connecting the edge connector of the wire harness to the connection board after inserting the connection board into the through holes of the plurality of ECU boards arranged to be stacked. 5 is a perspective view of the ECU board storage box, FIG. 6 is a perspective view showing a state immediately before the edge connector is connected to a modified example of the terminal connection part of the connection board, and FIG. 7 is another modification of the terminal connection part of the connection board. FIG. 8 is a perspective view showing an example of a method for manufacturing a connection board, FIG. 9 is a perspective view of a further modification of the connection board, and FIG. 10 is a connection board. A plan view showing an example of an electric circuit pattern, and Figure 11 is an exploded perspective view showing a modification of the ECU board connection structure using a hollow connector as a connection portion of the ECU board.

  As shown in FIGS. 1 and 4, the ECU board 21 is a printed circuit board, and a circuit pattern 26 formed on the base board 25 and the base board so as to be electrically connected to the circuit pattern 26. 25, and an electronic control unit (ECU) 20 composed of various electronic components mounted on the control unit 25. The electronic control unit 20 generates a control signal based on signals input via the wire harnesses 31, 35, 39 and the connection board 23, and outputs the control signals via the wire harnesses 31, 35, 39 and the connection board 23. Electrical components (not shown) distributed in each part of the vehicle are controlled. Functions to be controlled by the electronic control unit 20 include, for example, a headlight adjustment function that adjusts the direction of the headlight according to the inclination of the vehicle body and the steering wheel operation, an auto wiper function that controls the automatic detection wiper, and an obstacle Examples include a sonar function for controlling object detection. In the embodiment shown in FIGS. 1 and 4, the plurality of ECU boards 21 are composed of four (four layers) ECU boards 21A, 21B, 21C, and 21D having different functions.

  As shown in FIG. 2, in the base board 25 of each ECU board 21, a through hole 25 a defined by a rectangular inner edge (that is, an inner peripheral surface) is penetrated in the thickness direction of the base board 25. Is formed. The size of the through hole 25a is substantially the same as the cross-sectional outline of the connection substrate 23, and the connection substrate 23 can be inserted into the through hole 25a. Further, one end 26a of the circuit pattern 26 formed on the base board 25 is integrated and disposed in the vicinity of the rectangular inner edge of the through hole 25a so as to surround the through hole 25a. A plurality of wire-like or plate-like conductive elastic members (connection portions) 27 having one end electrically connected to one end 26a of the circuit pattern 26 by soldering or the like are partially in the base board 25. It is extended and arranged in the plate thickness direction.

  Similar to the ECU board 21, the connection board 23 is also a printed circuit board. The connection board 23 is a so-called multilayer board formed by laminating electric circuit patterns 29 in a thickness direction in a plurality of layers. The interval between the electric circuit patterns 29 formed on the surface (which may be one side or both sides) of the substrate 23 is such that the conductive elastic member (connection portion) 27 provided in the through hole 25a of the ECU substrate 21 The interval is the same as the interval. That is, the electrical circuit pattern 29 is connected to the conductive elastic member (connection portion) 27 in a one-to-one correspondence when the connection board 23 is inserted into the through hole 25a of the ECU board 21.

  As shown in FIG. 3, each electric circuit pattern 29 includes pads 29 a that are arranged at predetermined intervals in the longitudinal direction of the connection substrate 23 and are formed with the circuit width widened. Each pad 29a has a one-to-one correspondence with the conductive elastic member 27 (hereinafter referred to as the connecting portion 27) of the plurality of ECU boards 21, and is in contact with and connected to each other. The predetermined interval in the longitudinal direction is the same interval as the interval between the base boards 25 of the plurality of ECU boards 21 arranged so as to be stacked. Thereby, the pad 29a can be collectively connected to the connection portions 27 of the plurality of ECU boards 21 only by inserting the connection board 23 into the through hole 25a. Further, terminal connection portions 29 b formed by increasing the circuit width of the electric circuit pattern 29 are disposed at the end portions of the connection substrate 23. That is, the pad 29 a and the terminal connection portion 29 b are formed integrally with the electric circuit pattern 29. Each pad 29a is classified and grouped for each wiring system via the electric circuit pattern 29, and is electrically connected to a predetermined terminal connection portion 29b.

  That is, the terminal connection portion 29b is classified for each wiring system (for example, engine system, instrument panel system, floor system, etc.), and is arranged at the end of the connection board 23. More specifically, the terminal connection part 29b is classified by the electric circuit pattern 29 according to the wiring system of the connection part 27 in contact with the pad 29a electrically connected to the terminal connection part 29b, and is connected together. Arranged at the end of the substrate 23. Since the connection board 23 is made of a multilayer board, the electric circuit pattern 29 connecting each pad 29a and the terminal connection portion 29b is classified for each wiring system. The satisfactory electric circuit pattern 29 can be configured without hindrance.

  As shown in FIGS. 1 and 4, the terminal connection portion 29 b formed at the end portion (upper end in the drawing) of the connection substrate 23 is, for example, an edge connector 33 of an engine system wire harness 31, an instrument panel system Are connected to the edge connector 37 of the wire harness 35 and the edge connector 41 of the wire harness 39 of the floor system. The engine system wire harness 31 goes to the engine room (not shown), the instrument panel system wire harness 35 goes to the instrument panel (not shown), and the floor system wire harness 39 goes to the vehicle interior (not shown). , Respectively.

Next, connection between the ECU board 21 and the electrical component will be described.
A means for arranging the base boards 25 at intervals so that the plurality of ECU boards 21A, 21B, 21C, and 21D are stacked while the through holes 25a are aligned is arbitrary. It is preferable to use the ECU board storage box 101 shown in FIG. The ECU board storage box 101 has a storage box main body 103 and a top cover (lid body) 53 partially shown in FIGS. 1 and 4. The storage box body 103 is a rectangular box whose front and upper surfaces are open, and is formed so that four grooves 103b face each of the inner surfaces of both side walls 103a. The upper surface cover 53 includes an insertion slot 53a penetrating in the plate thickness direction. The upper surface cover 53 is overlaid on the storage box body 103 to close the upper surface of the storage box body 103, and is fixed to the storage box body 103 by a fastening member (not shown) such as a screw. The plurality of ECU boards 21A, 21B, 21C, and 21D are inserted into the storage box body 103 and guided in the four pairs of opposed grooves 103b until they come into contact with the rear plate 103d, and are stored in the storage box body 103. The Thereby, the plurality of ECU boards 21A, 21B, 21C, and 21D are aligned. At this time, the plurality of ECU boards 21A, 21B, 21C, and 21D are arranged while the through holes 25a are aligned with the insertion slots 53a of the upper surface cover 53, respectively. These base boards 25 are arranged at intervals so as to be stacked. The through hole 25a extends in a direction (more specifically, a direction orthogonal to the surface) where the connection substrate 23 intersects the surface of the base board 25 where the electric circuit pattern 26 is formed from the insertion slot 53a of the upper surface cover 53. The connection board 23 and the plurality of ECU boards 21A, 21B, 21C, and 21D are electrically connected until they contact the inner bottom surface of the storage box body 103. As a result, the plurality of pads 29a of the connection board 23 are simultaneously brought into contact with and electrically connected to the connection portions 27 of the plurality of ECU boards 21A, 21B, 21C, and 21D. That is, the plurality of pads 29a and the connection portion 27 can be easily connected in a very short time by simply inserting the connection board 23 through the through hole 25a.

  Then, edge connectors 33, 37, and 41 are connected to each terminal connection portion 29b provided at the end portion (upper end) of the connection substrate 23 protruding outside from the insertion slot 53a of the upper surface cover 53 of the ECU substrate storage box 101 ( The wire harnesses 31, 35, and 39 are routed to an area where the corresponding electrical components are mounted (or the wire harnesses 31, 35, and 39 are electrically connected to the corresponding electrical components in advance. May be connected). Since the terminal connection portions 29b provided at the end portions of the connection board 23 are classified and arranged for each wiring system by the electric circuit pattern 29, the respective edge connectors 33, 37, and 41 are connected. The terminal connection portion 29b to be identified can be easily identified, and can be reliably connected to the predetermined terminal connection portion 29b. Thereby, the connection of the wire harnesses 31, 35, 39 is simplified, and the erroneous fitting of the connectors 33, 37, 41 is reliably prevented.

  As shown in FIGS. 6 and 7, the electrical circuit patterns 29 formed on the connection substrate 23 are formed at a high density by narrowing the intervals, and the terminal connection portions 29 b are shifted in the longitudinal direction of the connection substrate 23. If it is formed in two rows, it is possible to further reduce the space. Needless to say, the electric circuit pattern 29 may be provided on both surfaces of the connection substrate 23 to further reduce the space. The edge connector 33 shown in FIG. 6 presses the operating portion 43 so that a locking pin (not shown) protrudes and engages with a locking hole 23 a provided in the connection board 23, thereby connecting the edge with the connection board 23. The connector 33 is securely coupled. Further, the edge connector 33 shown in FIG. 7 is connected by pressing the operating portion 45 so that the engaging portion (not shown) is engaged with the engaging recess 23b of the connecting substrate 23 from the lateral direction of the connecting substrate 23. The board 23 and the edge connector 33 are securely coupled.

  Further, when the electric circuit pattern 29 can be connected to each pad 29a and the terminal connection portion 29b in a simple shape such as a straight line, a connection having a width corresponding to several of the connection substrates 23 as shown in FIG. The substrate original plate 47 can be manufactured, and can be used as the connection substrate 23 by being divided by a cut line CL indicated by a two-dot chain line so as to include the required number of electric circuit patterns 29 as necessary. In this case, the connection board 23 can be manufactured more efficiently, and the connection board 23 can be provided at a lower cost.

  Further, as shown in FIGS. 9 and 10, when the connection between the pad 29a and the connection portion 27 is partially unnecessary, the connection substrate 23 is manufactured in a pattern shape in which the electric circuit pattern 29 of the unnecessary portion is deleted in advance. Alternatively, the necessary electric circuit pattern 29 may be configured by cutting off a part of the electric circuit pattern 29. Further, if possible, a plurality of electric circuit patterns 29 can be integrated to reduce the number of patterns, and more space can be saved. Specifically, as shown in FIG. 10A, for example, in the electric circuit pattern 29-1 in the first column, only the terminal connection part 29b-1 and the pad 29a-14 in the fourth row are connected, In the electric circuit pattern 29-2 in the second column, the pad 29a-23 in the third row, the pad 29a-22 in the second row, and the pad 29a-21 in the first row are connected, and the electric circuit pattern 29 in the third column is connected. 3, only the terminal connection portion 29 b-3 and the fourth row of pads 29 a-34 are connected. In the fourth column of the electric circuit pattern 29-4, the third row of pads 29 a-43 and the second row of pads are connected. When the pattern to which 29a-42 is connected is necessary, as shown in FIG. 10 (b), the electric circuit pattern 29-1 in the first column and the electric circuit pattern 29-2 in the second column are 3 rows of electric circuit pattern 2 -3 and the fourth row of electric circuit patterns 29-4 are integrated to form electric circuit patterns 29B-1, 29B-2, and four rows of electric circuit patterns 29 (29-1, 29-2, 29-3). , 29-4) can be integrated into two rows of electric circuit patterns 29 (29B-1, 29B-2), and a connection board 23B having the same function and further saving space can be obtained.

  According to the present embodiment, the base boards 25 are arranged at intervals so that the plurality of ECU boards 21A, 21B, 21C, and 21D are stacked while the through holes 25a are aligned, and the through holes 25a are arranged. By inserting the connection board 23 into each of them, the pads 29a of the connection board 23 and the connection portions 27 of the plurality of ECU boards 21 are connected together, so that the connectors of each ECU board 21 can be greatly reduced. Can do. Therefore, the connection work of the connection portions 27 of the plurality of ECU boards 21 can be performed in a short time by a simple work of simply inserting the connection board 23 into the through holes 25a of the plurality of ECU boards 21. Further, the number of parts (particularly, the number of connectors) can be reduced to reduce the manufacturing cost, and the weight of the ECU board 21 can be reduced. As a result, the number of man-hours for routing can be greatly reduced, and erroneous connector fitting, that is, incorrect routing can be reliably prevented, and highly reliable routing can be performed. Note that the effect of reducing the number of parts, the man-hours for wiring work, and the prevention of incorrect wiring become more remarkable as the number of ECU boards 21 to be connected increases.

  Further, the interval between the ECU boards 21 (base board 25) arranged so as to be stacked is such that the adjacent ECU boards 1 and 2 are connected to each other by the inter-board connectors 6 and 7, and the interval between the ECU boards 1 and 2 is between the boards. Compared to the conventional one that is limited by the height of the connectors 6 and 7, it is limited only by the height of the electronic components constituting the electronic control unit 20. Can be arranged as Therefore, many ECU boards 21 can be concentrated and arranged in a narrow space. As a result, the vehicle interior space can be expanded and a comfortable vehicle interior space can be ensured despite the high functionality.

  Furthermore, since the terminal connection portions 29b are classified and arranged for each wiring system and arranged at the end of the connection board 23, the wire harnesses 31, 35, 39 prepared for each wiring system are provided. The wire harnesses 31, 35, and 39 can be connected in a very simple and organized state by simply connecting the terminal connection portion 29 b of the connection board 23. Therefore, a complicatedly shaped wire harness in which a plurality of connectors are branched from one wire harness is not necessary, and the production of the wire harnesses 31, 35, 39 is facilitated. Further, it is not necessary to connect the plurality of connectors to the ECU board 21 separately, and wiring of one wiring system only connects one connector 33, 37 or 41 to the terminal connection portion 29b of the connection board 23. Can be routed very easily. As a result, erroneous assembly of the connectors 33, 37, and 41 can be reliably prevented, and the wiring harnesses 31, 35, and 39 can be routed in an organized manner, and subsequent maintenance is facilitated.

  According to the present embodiment, since the connection board 23 is configured by a multilayer board in which electric circuit patterns 29 are laminated in a plurality of layers, the connection portions 27 of the plurality of ECU boards 21 are classified for each wiring system, Even if a complicated circuit configuration is required to replace the arrangement and arrange the terminal connection portions 29b in one place collectively for each wiring system, the electric circuit pattern 29 that satisfies this requirement can be formed without any trouble. .

  Further, according to the present embodiment, the connecting portion 27 is a conductive elastic member disposed so as to partially protrude into the through hole 25a from the inner peripheral surface of the base board 25 that forms the through hole 25a. The connecting portion 27 can be formed to have substantially the same thickness as the thickness of the base board 25. Thereby, the connection part 27 does not become a restriction | limiting matter of the space | interval of the ECU board | substrate 21 arrange | positioned so that it may laminate | stack, but can arrange | position several ECU board | substrates 21 at a narrow space | interval. Further, the structure of the connecting portion 27 is simplified and can be manufactured at low cost. Furthermore, since the pad 29a is pressed by the elastic force of the connecting portion 27, the electrical connection can be reliably maintained even if there is vibration associated with traveling of a vehicle such as an automobile.

  In addition, according to the present embodiment, the terminal connection portions 29b of the connection board 23 that are classified and arranged for each wiring system and the electrical components that are distributed and arranged in each part are independent for each wiring system. Since it is connected by the provided wire harnesses 31, 35, 39, the wire harnesses 31, 35, 39 are simply connected to the terminal connection part 29b for each wiring system. It is possible to connect in an extremely simple and organized state. Thereby, the incorrect assembly | attachment of the connectors 33, 37, and 41 can be prevented reliably. Further, since the wire harnesses 31, 35, 39 are connected in an organized state, subsequent maintenance is facilitated.

Next, a modification of the ECU board connection structure will be described with reference to FIG.
As shown in FIG. 11, the ECU board 21 in this modified example is different from the ECU board 21 shown in FIGS. 1, 2, and 4 in that a hollow connector 55 is provided as a connection part 27. Since these are the same, the same parts are denoted by the same or corresponding reference numerals, and the description thereof will be simplified or omitted. In FIG. 11, for ease of understanding, only one ECU board 21 is illustrated among the ECU boards 21 arranged so that a plurality of the boards are stacked.

  The hollow connector 55 is formed of a synthetic resin or the like and is electrically connected to the frame-shaped housing 57 having an insertion hole 57a penetrating in the vertical direction and the circuit pattern 26 of the ECU board 21, and defines the insertion hole 57a. And an electric contact portion 59 arranged so as to protrude from the inner peripheral surface of the frame-shaped housing 57 into the insertion hole 57a. The hollow connector 55 has the electrical contact portion 59 in a state where the insertion hole 57a coincides with the through hole 25a of the ECU board 21 (that is, the insertion hole 57a is aligned with the through hole 25a of the ECU board 21). A terminal fitting (not shown) having an outer surface of the frame-shaped housing 57 is fixed to the base board 25 of the ECU board 21 by being connected to one end of the circuit pattern 26 by soldering or the like. The base boards 25 are arranged at intervals so that the plurality of ECU boards 21 are stacked while the insertion holes 57a are aligned, and the connection board 23 is inserted into each of the insertion holes 57a and the through holes 25a. As a result, the pads of the connection board 23 collectively come into contact with the electrical contact portions 59 of the hollow connectors 55 of the plurality of ECU boards 21 and are electrically connected.

  According to the present embodiment, the connecting portion 27 is the hollow connector 55, and the insertion hole 57a is arranged on the base board 25 so as to coincide with the through hole 25a of the ECU board 21, so that the shape common to each ECU board 21 is provided. The hollow connector 55 is mass-produced and prepared in advance, whereby the connection portion 27 can be easily configured using the inexpensive hollow connector 55.

  Other actions and effects of the ECU board connection structure can be easily inferred from the above description in FIGS.

  Note that the present invention is not limited to the above-described embodiments and modifications, and modifications, improvements, and the like can be made as appropriate. In addition, the material, shape, dimension, numerical value, form, number, location, and the like of each component in the above-described embodiments and modifications are arbitrary and are not limited as long as the present invention can be achieved.

  In the above-described embodiments and modifications, the connection board which is a multilayer board is adopted. However, the present invention is not limited to this, and the pads connected to the ECU board are classified for each wiring system and collectively connected to the terminals. Any printed circuit board may be used as long as the connection portion can be arranged, for example, a printed circuit board having a simple configuration in which an electric circuit pattern is formed only on the surface of the board.

It is a disassembled perspective view which shows the ECU board connection structure which is embodiment of this invention. It is an enlarged view of the part enclosed by the ellipse II in FIG. FIG. 3 is an enlarged view of a portion surrounded by an ellipse III in FIG. 1. It is a perspective view which shows the state just before connecting the edge connector of a wire harness to a connection board, after inserting a connection board in the through-hole of several ECU boards arranged so that it may laminate | stack. It is a perspective view of ECU board | substrate accommodation box. It is a perspective view which shows the state just before an edge connector is connected to the modification of the terminal connection part of a connection board. It is a perspective view which shows the state just before an edge connector is connected to the other modification of the terminal connection part of a connection board. It is a perspective view which shows an example of the manufacturing method of a connection board | substrate. It is a perspective view of the further modification of a connection board. An example of an electric circuit pattern of a connection substrate is shown, (a) is a plan view showing an example of an electric circuit pattern before pattern integration, and (b) is a plan view showing an example of an electric circuit pattern after pattern integration. It is a disassembled perspective view which shows the modification of ECU board | substrate connection structure using a hollow connector as a connection part of ECU board | substrate. It is a side view of the conventional ECU board | substrate connected by the board | substrate connector. It is a perspective view which shows the conventional connection structure where the connector branched from the wire harness of the same wiring system is connected to several ECU board | substrates. It is a perspective view which shows the conventional connection structure where the connector of a some wiring system is integrated and connected to one ECU board.

Explanation of symbols

20 ECU (electronic control unit)
21 ECU board 23 Connection board 25 Base board 25a Through hole 26 Circuit pattern 27 Connection part (conductive elastic member)
29 Electrical circuit pattern 29a Pad 29b Terminal connection part 31 Wire harness 35 Wire harness 39 Wire harness 55 Connection part (hollow connector)
57 Frame type housing 57a Insertion hole 59 Electrical contact part

Claims (4)

A base board having a circuit pattern, a through hole penetrating the base board, an electronic control unit mounted on the base board so as to be electrically connected to the circuit pattern, and electrically connected to the circuit pattern A plurality of ECU boards having a plurality of connecting portions extended to the through hole,
An electrical circuit pattern, a plurality of pads formed on the electrical circuit pattern for electrical connection to the connection part of the ECU board, and the pad electrically connected to the electrical circuit pattern A connection board having a terminal connection part arranged collectively for each wiring system while being classified for each wiring system of the connection part of the ECU board,
The base boards are arranged at intervals so that a plurality of the ECU boards are stacked while the through holes are aligned, and the connection board is inserted into each of the through holes, whereby the connection An ECU board connection structure, wherein pads of a board are connected to a plurality of connection parts of the ECU board in a lump.   The said connection part is a conductive elastic member arrange | positioned so that it may protrude partially in the said through-hole from the internal peripheral surface of the said base board which forms the said through-hole. ECU board connection structure.   The connection portion is a hollow connector, and the hollow connector is disposed so as to protrude into the insertion hole from a frame-shaped housing in which an insertion hole is formed and an inner peripheral surface of the frame-shaped housing that defines the insertion hole. 2. The ECU board connection structure according to claim 1, further comprising an electrical contact portion and fixed to the base board so that the insertion hole is aligned with the through hole.   The said ECU board connection structure as described in any one of Claims 1-3 WHEREIN: The said terminal connection part of the said connection board and the electrical equipment distributedly arranged are each independent for every said wiring system | strain. ECU board connection structure, further comprising a plurality of wire harnesses for connection.

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