JP6053452B2 - Assembly board - Google Patents

Description

  The present invention relates to an electronic control device for a moving body.

  2. Description of the Related Art Some vehicle electronic control devices have two circuit boards arranged in a housing case, each of which has a connector electrically connected to an external device. The two connectors are arranged so as to protrude in the same direction from the housing case, and when an external harness is connected to each connector, the wiring can be concentrated in one place. Further, the two circuit boards having different sizes are used, and are arranged vertically in the housing case (see, for example, Patent Document 1). Here, in the conventional electronic control apparatus, one connection connector for connecting the two circuit boards to each other is mounted one by one, and the two connectors are arranged vertically by connecting the connection connectors to each other. The circuit board is supported so that the orientation, arrangement interval, and parallelism of the circuit boards are maintained. Further, the connector for connection also plays a role of electrically connecting the two circuit boards.

  When manufacturing an electronic control device, two circuit boards are first coupled using a connector for connection, and then the two circuit boards are inserted into the housing case. A guide groove is carved in the side portion of the inner wall of the housing case, and the larger circuit board is engaged with the guide groove. The smaller circuit board is fixed to the corner on the front side of the housing case with screws.

JP 2004-235444 A

Here, in a saddle-ride type vehicle, for example, a motorcycle, a moped, an ATV (All Terrain Vehicle), a scooter, and the like, a mounting space for an electronic control device is narrower than that of a four-wheeled vehicle. For this reason, it is necessary to further reduce the size of the electronic control unit as compared with the four-wheeled vehicle. However, when the electronic control device is downsized, the arrangement interval between the circuit boards and between the electronic components is reduced, so that the heat generated by the electronic components on the lower circuit board affects the electronic components on the upper circuit board. It becomes easy to give.
The present invention has been made in view of such circumstances, and an object thereof is to reduce the size of an electronic control device by reducing the influence of heat between circuit boards.

According to the present invention, a housing case provided with an opening at at least one end, a first circuit board and a second circuit board on which a connector connectable to an external device and an electronic component are respectively mounted, and the first circuit board In the electronic control device housed in the housing case so that the circuit board and the second circuit board are parallel to each other, the first circuit board and the second circuit board partially have a gap. are arranged to overlap with the accommodating case, the housing case to avoid the two regions and wherein the first circuit board a second circuit board overlap from each side that faces the circuit board A plurality of concave portions provided toward the inside, and a plate passing between the first circuit board and the second circuit board in a region where the first circuit board and the second circuit board overlap each other. And the plate is The vehicle electronic control device, characterized in that provided in the housing case together so as to connect the concave portion between the numbers is provided.

Further, according to the present invention, the plate is formed with a notch, and the wiring for electrically connecting the first circuit board and the second circuit board is passed through the notch. The vehicular electronic control device according to claim 1 is provided.

According to the present invention, a tall capacitor is mounted on the first circuit board in an area where the first circuit board and the second circuit board overlap with each other and a plurality of the recesses are avoided. A vehicle electronic control device according to claim 2 is provided.

  According to the present invention, heat generated in the electronic component of the first circuit board is prevented from being directly transferred to the second circuit board. Since the arrangement interval between the two circuit boards can be reduced, the electronic control device can be reduced in size.

FIG. 1 is a perspective view of a vehicle electronic control device according to an embodiment of the present invention as viewed from above. FIG. 2 is a perspective view of the vehicle electronic control device according to the embodiment of the present invention as seen from below. FIG. 3 is a front view showing a state before pouring resin, which is a view taken along the arrow A in FIG. 1 in the vehicle electronic control device according to the embodiment of the present invention. 4 is a cross-sectional view taken along line BB in FIG. 3 in the vehicle electronic control device according to the embodiment of the present invention.

The form for implementing this invention is demonstrated in detail below.
FIG. 1 is a perspective view of the electronic control device. The electronic control device 1 has a resin containing case 2. The housing case 2 has an opening 2A on the front surface and a hollow structure in which the back surface 2B is closed. Two connectors 3 and 4 protrude from the opening 2A. The first and second connectors 3 and 4 are arranged in the same direction from the housing case 2, and each has a shape to which an external harness connected to an external device can be coupled. Further, the internal space of the housing case 2 is filled with a resin 5.

  Further, on the upper surface 2 </ b> C of the storage case 2, a first recess 6 is formed at a position offset from the center of the storage case 2 toward the one side surface 2 </ b> E. The first recess 6 extends from the back surface 2B side of the housing case 2 to the front side of the opening 2A on the front surface of the housing case 2 so as to be substantially parallel to the side surface 2E and elongated.

  Further, as shown in a perspective view of the electronic control device 1 as viewed from below in FIG. 2, a second recess 7 is formed on the lower surface 2D of the housing case 2 from the center of the housing case 2 to the other side surface 2F side. Are formed at offset positions. The second recess 7 extends from the back surface 2B of the housing case 2 to the vicinity of the front opening 2A substantially parallel to the side surface 2F. A plurality of ribs 8 are formed in the second recess 7 substantially parallel to the side surface of the housing case 2. The plurality of ribs 8 serve to increase the strength of the housing case 2 and to release heat. The first dent 6 and the second dent 7 are formed one by one in the left-right direction with respect to the center of the housing case 2, and the two dents 6 and 7 do not interfere with each other. .

Further, FIG. 3 shows an A arrow view of FIG. 1 before the resin 5 is filled. FIG. 3 shows a state where the first connector 3 is removed for easy understanding.
In the housing case 2, a first circuit board 10 having a large area is disposed on the lower side, and a second circuit board 11 having a relatively small area is disposed on the upper side in parallel. The two circuit boards 10 and 11 are arranged so as to partially overlap in the vertical direction while having a predetermined interval in the vertical direction.

  Here, a pair of rails 21 is formed on the inner wall of one side surface 2E of the housing case 2. Similarly, a pair of rails 22 is formed on the inner wall 7 </ b> A formed by the second recess 7 projecting inside the housing case 2. These rails 21 and 22 are formed in parallel at a position where the height from the lower surface 2D is the same and from the vicinity of the opening 2A on the front surface of the housing case 2 to the rear surface 2B. Further, the pair of rails 21 and the rails 22 are arranged with gaps that can be engaged with the side portions of the first circuit board 10, and the first circuit board 10 is connected to the rails 21, 21. By inserting along 22, the first circuit board 10 can be positioned and accommodated in the accommodation case 2.

  A pair of rails 24 are formed on the inner side wall of the other side surface 2F of the storage case 2 from the vicinity of the opening 2A on the front surface of the storage case 2 to the back surface 2B. Further, a pair of rails 25 are formed on the inner wall of the back surface 2B of the housing case 2. These rails 24 and 25 are formed at the same height from the lower surface 2D. Further, the pair of rails 24 and the rails 25 are arranged with gaps that can be engaged with the side portions and the back portion of the second circuit board 11, respectively. The second circuit board 11 can be positioned and accommodated in the accommodation case 2 by being inserted along the rail 24 and being engaged with the rail 25.

  And as shown in FIG. 3 which is sectional drawing along the BB line of FIG. 3 and FIG. 3, the heat insulation board 15 so that the two hollow parts 6 and 7 may be connected inside the storage case 2. As shown in FIG. Are integrally formed. The heat shield plate 15 extends so as to pass between the two circuit boards 10 and 11 in a region where the two circuit boards 10 and 11 are overlapped. Such a heat shield plate 15 prevents heat generated in the first circuit board 10 from being directly transmitted to the second circuit board 11 and suppresses a temperature rise of the second circuit board 11. Here, the heat shield plate 15 also functions as a partition plate that partitions the arrangement space of the two circuit boards 10 and 11.

  Further, the heat shield plate 15 is formed with a cutout portion 15 </ b> A on the distal end side of the connecting portion with the first recess 6. As shown in FIG. 3, a cable 16 that electrically connects the two circuit boards 10 and 11 can be passed through the notch 15 </ b> A.

  Further, as shown in FIGS. 3 and 4, the first circuit board 10 has the first connector 3 mounted on the front side, and other regions such as capacitors and FETs (Field effect transistors). An electronic component 31 is mounted. Examples of the use of the first circuit board 10 include a drive circuit such as a motor.

  Here, among electronic components mounted on the first circuit board 10, a tall electronic component 32 such as an electric field capacitor is mounted at a position away from the second circuit board 11. More specifically, the tall electronic component 32 is mounted on the left side of the first circuit board 10, that is, on the side surface 2 </ b> F side of the housing case 2, at a position that avoids the first recess 6 of the housing case 2. . On the other hand, a short electronic component 33 is mounted in another region of the first circuit board 10, particularly in a region overlapping with the first circuit substrate 11. Examples of the short electronic component 33 include an FET, a chip component such as a short resistor or capacitor, a CPU (Central Processing Unit), and an IC (Integrated Circuit).

Furthermore, a bus bar 35 that is electrically connected to the short electronic component 33 is mounted on the first circuit board 10. The bus bar 35 is disposed below the heat shield plate 15 and extends toward the first connector 3 through the plurality of short electronic components 33 so as to release heat generated by the electronic components 33. ing. Furthermore, the front end portion 35A of the bus bar 35 is bent just before the first connector 3 so as to easily release heat to the outside.

  As shown in FIG. 3, the second circuit board 11 has a second connector 4 mounted on the front side, and a capacitor, a field effect transistor (FET), and other electronic components 41 are mounted in other areas. Has been. Further, a connector 42 for connecting the flexible cable 16 electrically connected to the first circuit board 10 is connected. The cable 16 is connected to the first circuit board 10 via the connector 43. As an application of the second circuit board 11, for example, there is a drive circuit for a fuel injection device.

  When the electronic control device 1 is manufactured, first, the two circuit boards 10 and 11 on which the connectors 3 and 4 and the electronic components 31 and 41 are mounted are electrically connected by the cable 16. Subsequently, the two circuit boards 10 and 11 are inserted into the resin-molded housing case 2. The circuit boards 10 and 11 are guided to predetermined positions while being guided by rails 21 to 25 formed in the housing case 2. A taper (not shown) is formed at the tip of each rail 21 to 24 so that the circuit boards 10 and 11 can be easily received, so that the circuit boards 10 and 11 can be easily inserted.

  The first circuit board 10 is arranged along the lower surface 2 </ b> D of the housing case 2, and each electronic component 31 is arranged so as to avoid the first depression 6. On the other hand, the second circuit board 11 is disposed mainly in the housing case 2 above the convex portion formed by the second depression 7 and partially overlaps the first circuit board 10. The At this time, the heat shield 15 and the second circuit board 11 are arranged above some short electronic components 33 on the first circuit board 10. Note that there is no interference because there is a predetermined gap between the short electronic component 33 and the heat shield 15 and the second circuit board 11. When each circuit board 10, 11 is accommodated in the accommodation case 2, the resin 5 is filled into the accommodation case 2, and after the gap is filled, it is cured.

  As described above, since the heat shield plate 15 is provided in the region where the first circuit board 10 and the second circuit board 11 overlap vertically, the electronic components 31 and 41 of the one circuit board 10 and 11 are provided. Can be prevented from being directly transferred to the electronic components 31 and 41 of the other circuit boards 10 and 11. Accordingly, the arrangement interval between the two circuit boards 10 and 11 can be reduced, so that the housing case 2 and the electronic control device 1 can be reduced and can be mounted in a narrow area. Furthermore, since the 1st hollow part 6 and the 2nd hollow part 7 were formed in case 2, the volume of the internal space of case 2 can be reduced.

  Here, since the amount of the resin 5 filled in the housing case 2 can be reduced by reducing the size of the housing case 2, the cost can be reduced and the electronic control device 1 can be reduced in weight. Further, by reducing the amount of the resin 5, the curing time of the resin 5 is shortened, and the manufacturing time of the electronic control device 1 can be shortened.

  Furthermore, since the heat shield 15 is formed so as to connect the two recesses 6 and 7, the strength of the housing case 2 can be increased. If the heat shield 15 is formed integrally with the housing case 2, the strength of the housing case 2 can be further increased.

  Further, since the notch 15A is provided on the front end side of the heat shield plate 15 and the cable 16 is passed through the notch 15A, the positioning of the cable 16 is performed when the circuit boards 10 and 11 are accommodated in the accommodating case 2. Becomes easier and work efficiency is improved. Furthermore, since the bus bar 35 is disposed below the heat shield plate 15 and the heat is released to the front side of the housing case 2 through the bus bar 35, heat transfer between the two circuit boards 10 and 11 is further suppressed. it can.

  The present invention is not limited to the embodiments, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Electronic controller 2 Housing | casing case 3, 4 Connector 6 1st hollow part 7 2nd hollow part 10 1st circuit board 11 2nd circuit board 15 Heat shield 15A Notch part 16 Cable

Claims (3)

A storage case having an opening at at least one end;
A first circuit board and a second circuit board on which connectors and electronic components connectable to external devices are respectively mounted;
In the electronic control device housed in the housing case so that the first circuit board and the second circuit board are parallel to each other,
The first circuit board and the second circuit board are arranged so that a part thereof overlaps with a gap,
The housing case has a plurality of recesses provided toward the inside of the housing case to avoid the two regions and wherein the first circuit board a second circuit board overlap from each side that faces the circuit board And a plate that passes between the first circuit board and the second circuit board in a region where the first circuit board and the second circuit board overlap, and the board has a plurality of the recesses An electronic control device for a vehicle, which is integrally provided in a housing case so as to connect each other.   A notch is formed in the plate, and a wiring for electrically connecting the first circuit board and the second circuit board is passed through the notch. Item 2. The vehicle electronic control device according to Item 1. A tall capacitor is mounted on the first circuit board in an area where the first circuit board and the second circuit board overlap with each other and a plurality of the recesses are avoided. Item 3. The vehicle electronic control device according to Item 2.

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