JP2017022184A - Electronic component unit substrate, and electronic component unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic component unit substrate and an electronic component unit which can secure handling easiness.SOLUTION: An electronic component unit substrate 3 and an electronic component unit 1 comprise: a plurality of mounting parts 31 on which electronic components 2 are mounted; and a bent part 32 which is more flexible than the mounting part 31 and electrically connects the plurality of mounting parts 31. The bent part 32 has an elastic region in which an angle between one mounting part 31 and the other mounting part 31 connected at least with the bent part 32 becomes 0° or more and 7.5° or less. Thereby, the electronic component unit substrate 3 and the electronic component unit 1 can secure handling easiness.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an electronic component unit substrate and an electronic component unit.

  As an electronic component unit provided in a conventional wire harness mounted on a vehicle or the like, for example, in Patent Document 1, a bottom portion where a connector pin is erected and a connector pin is surrounded along an outer periphery of the bottom portion. An electronic control device is disclosed that includes a connector housing having a side wall portion that forms a connector insertion region into which a connector to be connected is inserted. In this electronic control device, the connector housing also serves as a case for housing the circuit board, and the circuit board is housed in accordance with the space inside the connector housing by being bent at a flexible portion. At the same time, the rear end side of the connector pin protruding from the bottom of the connector housing is electrically connected to the circuit board.

JP-A-2005-191130

  Incidentally, the electronic control device described in Patent Document 1 described above has room for further improvement in terms of ease of handling at the time of manufacturing work, for example.

  This invention is made | formed in view of said situation, Comprising: It aims at providing the board | substrate for electronic component units which can ensure ease of handling, and an electronic component unit.

  In order to achieve the above object, an electronic component unit substrate according to the present invention has a plurality of mounting portions on which electronic components are mounted, and is more flexible than the mounting portion and electrically connects the plurality of mounting portions. The bending portion has an elastic range in which an angle formed by at least one mounting portion connected to the bending portion and the other mounting portion is 0 ° or more and 7.5 ° or less. It is characterized by being.

  In the electronic component unit substrate, the angle between the one mounting portion and the other mounting portion to which the bent portion is connected is in the range of the plastic region in a state where the bent portion is housed in the housing. Can be within.

  In the electronic component unit substrate, the elastic region of the bent part may be adjusted by adjusting a ratio of a conductor in the bent part.

  In the electronic component unit substrate, the bent portion grounds the mounting portion with a connection conductor that electrically connects the one mounting portion to which the bent portion is connected and the other mounting portion. And a grounding conductor.

  In order to achieve the above object, an electronic component unit according to the present invention includes a plurality of mounting portions on which electronic components are mounted, and is more flexible than the mounting portion and electrically connects the plurality of mounting portions. A substrate having a bent portion; and a housing that accommodates the substrate in a state in which the bent portion is bent. The bent portion includes at least one mounting portion to which the bent portion is connected and the other mounting portion. A range in which the angle formed by is between 0 ° and 7.5 ° is an elastic region.

  In the electronic component unit, the bent portion has a plastic region in which an angle formed by one of the mounting portions and the other mounting portion to which the bent portion is connected in a state where the substrate is accommodated in the housing. It can be in the range.

  In the electronic component unit substrate and the electronic component unit according to the present invention, the angle between the at least one mounting portion and the other mounting portion of the bent portion that electrically connects the plurality of mounting portions is 0 ° or more. Since the range of 5 ° or less is formed to be an elastic region, the bent portion is prevented from plastic deformation until the angle formed by one mounting portion and the other mounting portion exceeds 7.5 °. Therefore, it is possible to ensure the ease of handling.

FIG. 1 is a perspective view illustrating a schematic configuration of an electronic component unit according to the embodiment. FIG. 2 is an exploded perspective view illustrating a schematic configuration of the electronic component unit according to the embodiment. FIG. 3 is an exploded perspective view illustrating a schematic configuration of the electronic component unit according to the embodiment. FIG. 4 is an exploded perspective view illustrating a schematic configuration of the electronic component unit according to the embodiment. FIG. 5 is an exploded perspective view illustrating a state where the cover of the electronic component unit according to the embodiment is removed. 6 is a cross-sectional view taken along line AA shown in FIG. FIG. 7 is a schematic cross-sectional view illustrating a schematic configuration of the substrate according to the embodiment. FIG. 8 is a schematic diagram illustrating the angle θ in the substrate according to the embodiment. FIG. 9 is a schematic diagram illustrating the elastic region of the substrate according to the embodiment. FIG. 10 is a perspective view illustrating a wiring pattern in the flexible part of the substrate according to the embodiment.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

[Embodiment]
FIG. 1 is a perspective view illustrating a schematic configuration of an electronic component unit according to the embodiment. 2, 3, and 4 are exploded perspective views illustrating a schematic configuration of the electronic component unit according to the embodiment. FIG. 5 is an exploded perspective view illustrating a state where the cover of the electronic component unit according to the embodiment is removed. 6 is a cross-sectional view taken along the line AA shown in FIG. 1 (cross-sectional view along the short side direction). FIG. 7 is a schematic cross-sectional view illustrating a schematic configuration of the substrate according to the embodiment. FIG. 8 is a schematic diagram illustrating the angle θ in the substrate according to the embodiment. FIG. 9 is a schematic diagram illustrating the elastic region of the substrate according to the embodiment. FIG. 10 is a perspective view illustrating a wiring pattern in the flexible part of the substrate according to the embodiment. In addition, in order to make it easy to understand, FIG.1, FIG.2, FIG.3 shows the electric wire with the dashed-two dotted line, and, in FIG.4, FIG.5, FIG.6, illustration of the electric wire is abbreviate | omitted. In addition, a power input connector, a power output connector, and a control signal connector, which will be described later, omit illustration of some elements such as a terminal insertion hole for simplification.

  1, 2, 3, 4, 5, 6, and 7, an electronic component unit 1 according to the present embodiment is mounted on a vehicle such as an automobile (see FIG. 1). It constitutes an electronic component module that is detachably assembled with respect to. Here, the electric connection box 100 is mounted on a vehicle such as an automobile, and is incorporated in a wire harness WH, and includes a connector, a fuse, a relay, a capacitor, a branching unit, an electronic control unit, and the like that constitute a connection processing part such as an electric wire. The electrical components are collected and accommodated inside. The wire harness WH is, for example, a bundle of a plurality of electric wires W used for power supply and signal communication for connection between devices mounted on a vehicle to form a collective part. Are connected to each device. The wire harness WH includes a plurality of electric wires W and an electric junction box 100 including the electronic component unit 1 electrically connected to the electric wires W. The electric wire W includes, for example, a conductor portion (core wire) obtained by twisting a plurality of conductive metal strands and an insulating covering portion that covers the outside of the conductor portion. The wire harness WH bundles and aggregates a plurality of electric wires W, and the electric connection box 100 is electrically connected to the end portions of the bundled electric wires W via a connector 6 as a connection portion. In addition to this, the wire harness WH may further include a grommet, a protector, a fixture, and the like. The electrical junction box 100 is installed in, for example, an engine compartment (engine room) or a vehicle compartment of a vehicle, connected between a power source such as a battery and various electronic devices mounted in the vehicle, and supplied from the power source. Distributes power to various electronic devices in the vehicle. The electrical junction box 100 may be called a junction box, a fuse box, a relay box, or the like. In the present embodiment, these are collectively called an electrical junction box. The electronic component unit 1 of the present embodiment incorporated in the electrical junction box 100 is connected between a power source such as a battery mounted on the vehicle and various electronic devices mounted on the vehicle, and the various electronic devices. It constitutes so-called power integration that distributes power to devices.

  Hereinafter, each structure of the electronic component unit 1 is demonstrated concretely. Each direction used in the following description will be described as a direction in which the wire harness WH is mounted on the vehicle unless otherwise specified. Further, here, in order to make the following explanation easy to understand, the first direction among the first direction, the second direction, and the third direction intersecting each other for convenience is referred to as a “height direction”. The direction is referred to as “short side direction”, and the third direction is referred to as “long side direction”. The height direction as the first direction, the short side direction as the second direction, and the long side direction as the third direction are orthogonal to each other.

  The electronic component unit 1 of the present embodiment includes an electronic component 2, a substrate 3 as an electronic component unit substrate, a terminal 4, and a housing 5.

  The electronic component 2 is mounted on the substrate 3, and here is an element that exhibits various functions. The electronic component 2 is, for example, a capacitor, a relay, a resistor, a transistor, an IPS (Intelligent Power Switch), an electronic control unit including a microcomputer, or the like. Here, the electronic component 2 includes, for example, a heat-generating component 21 that generates heat with power consumption and a heat-fragile component 22 that has lower heat resistance than the heat-generating component 21. The heat-generating component 21 is typically an electronic component 2 that is more likely to generate heat than the heat-fragile component 22 and has higher durability against heat than the heat-fragile component 22, and for example, power distribution such as relays, transistors, and IPS involved in power distribution. This is an electronic component 2 of the system. The heat-fragile component 22 is typically an electronic component 2 that is less likely to generate heat than the heat-generating component 21 and has less heat durability than the heat-generating component 21, for example, a control-system electronic component 2 such as a microcomputer involved in control. . In the following description, the heat-generating component 21 and the heat-fragile component 22 are simply referred to as the electronic component 2 when it is not necessary to distinguish between them.

  The board 3 constitutes an electronic circuit on which various electronic components 2 are mounted and electrically connected to each other. Here, the board 3 is a so-called rigid flexible printed circuit board (Rigid Flexible Printed Circuit Board). On the substrate 3, for example, a wiring pattern (print pattern) 3b is printed with a conductive material such as copper on an insulating layer 3a made of an insulating material such as epoxy resin, glass epoxy resin, paper epoxy resin, or ceramic. . The substrate 3 may be a multi-layered substrate (that is, a multilayer substrate) in which a plurality of insulating layers 3a printed with a wiring pattern 3b are stacked.

  The substrate 3 of the present embodiment includes a plurality of rigid portions 31 as a plurality of mounting portions on which the electronic component 2 is mounted, and a bending that is more flexible than the rigid portion 31 and electrically connects the plurality of rigid portions 31. It has a flexible part 32 as a part, and a plurality of rigid parts 31 and a flexible part 32 are integrated. Each rigid part 31 has high rigidity to such an extent that it is harder to bend than the flexible part 32. In each rigid portion 31, the lead wires and terminals 4 of the electronic component 2 are electrically connected to the wiring pattern 3b by soldering or the like. On the other hand, the flexible part 32 has a high flexibility so as to be bent more easily than the rigid part 31. The flexible part 32 is provided between the adjacent rigid parts 31 among the plurality of rigid parts 31, and electrically connects them to each other. The flexible part 32 electrically connects the plurality of rigid parts 31 via the wiring pattern 3b made of a conductive material such as copper. The substrate 3 corresponds to the flexible portion 32, for example, the rigid portion 31 and the flexible portion 32 are made of different materials for the insulating layer 3a, the number of laminated insulating layers 3a corresponding to the flexible portion 32 is reduced, or the like. The flexible part 32 having flexibility from the rigid part 31 can be formed by cutting a part of the insulating layer 3a to reduce the thickness. The substrate 3 of this embodiment illustrated in FIG. 7 has a plurality of insulating layers 3 a and wiring patterns 3 b of the rigid portion 31, whereas a portion of the insulating layer 3 a corresponding to the flexible portion 32 and The flexible part 32 is formed by forming the wiring pattern 3b as one layer.

  More specifically, the plurality of rigid portions 31 of the present embodiment are configured to include two of a power supply system rigid portion 33 as a first mounting portion and a control system rigid portion 34 as a second mounting portion. Both the power system rigid part 33 and the control system rigid part 34 are formed in a rectangular plate shape. The power supply system rigid portion 33 and the control system rigid portion 34 are formed in substantially the same shape and size. Here, in the power supply system rigid portion 33 and the control system rigid portion 34, the main surfaces on both the front and back sides constitute mounting surfaces 33a and 34a for mounting the electronic component 2, but the present invention is not limited thereto. The power supply system rigid portion 33 is mounted on each mounting surface 33a with a heat generating component 21 that is mainly a power distribution system electronic component 2 such as a relay, transistor, or IPS. On the other hand, in the control system rigid portion 34, the heat-fragile component 22 that is mainly the control-system electronic component 2 such as a microcomputer is mounted on each mounting surface 34a. The heat generating component 21 and the heat-fragile component 22 are fixed to the mounting surfaces 33a and 34a by soldering or the like, and are electrically connected to the wiring pattern 3b of the mounting surfaces 33a and 34a. In the following description, the power supply system rigid unit 33 and the control system rigid unit 34 are simply referred to as the rigid unit 31 when it is not necessary to distinguish between them.

  And the flexible part 32 of this embodiment electrically connects the power system rigid part 33 and the control system rigid part 34 as the some rigid part 31. As shown in FIG. The substrate 3 of the present embodiment is located side by side in a direction perpendicular to the long side in a positional relationship in which the long side of the power system rigid part 33 and the control system rigid part 34 face each other, The flexible part 32 is interposed between the power system rigid part 33 and the control system rigid part 34 in the direction orthogonal to the long side. That is, the flexible part 32 connects one long side of the power system rigid part 33 and one long side of the control system rigid part 34 along a direction orthogonal to the long side. The flexible portion 32 extends along the long side direction, and is formed to be slightly shorter than the long sides of the power system rigid portion 33 and the control system rigid portion 34 here. The flexible portion 32 has flexibility as described above, and can be bent in a direction in which the power system rigid portion 33 and the control system rigid portion 34 are folded around the bending axis along the long side direction. It is. As described later, the substrate 3 is in a state in which the flexible portion 32 is bent, more specifically, in a state in which the flexible portion 32 is bent so that the power system rigid portion 33 and the control system rigid portion 34 are substantially vertical. Housed in the housing 5.

  The terminal 4 is erected in a straight line from one of the plurality of rigid portions 31 and electrically connects the connector 6, which is a connection portion with the electric wire W, and the substrate 3. A plurality of terminals 4 are provided. Each terminal 4 is made of a conductive metal material. Each terminal 4 includes a terminal having a different outer dimension or having an end portion divided into two or three parts, but is basically formed in a straight bar shape. Here, the plurality of terminals 4 include a terminal 41 electrically connected to a power input connector 61 as a connector 6 to be described later, a terminal 42 electrically connected to a power output connector 62 as a connector 6, and a connector. 6 includes a terminal 43 electrically connected to the control signal connector 63. The terminal 41 is provided with one whose end is divided into three sections. Two terminals 42 having two end portions are provided side by side in the long side direction. Nineteen terminals 43 whose ends are not separated are provided side by side in the long side direction and the short side direction. In the following description, the terminals 41, 42, and 43 are simply referred to as terminals 4 when it is not necessary to distinguish between them.

  Each terminal 4 of this embodiment is erected only on the power system rigid portion 33 among the plurality of rigid portions 31. Each terminal 4 is erected in a straight line substantially perpendicular to one mounting surface 33 a of the power system rigid portion 33. That is, each terminal 4 protrudes and extends from the mounting surface 33a along the short side direction and the height direction orthogonal to the long side direction in a state where the substrate 3 is accommodated in a case 5 described later. Each terminal 4 has an end portion inserted from one side of the mounting surface 33a into a through hole 33b (see FIG. 2, FIG. 3, FIG. 4, etc.) provided in the portion where the wiring pattern 3b is formed on the mounting surface 33a. Then, it is fixed to the mounting surface 33a by soldering or the like, and is electrically connected to the wiring pattern 3b of the mounting surface 33a. In addition, each terminal 4 is exposed in a connector fitting portion 51h, 51i, 51j, which will be described later, in a state where the substrate 3 is accommodated in a casing 5 which will be described later, and the connector fitting portions 51h, 51i. , 51j are electrically connected to the connector 6 fitted.

  The housing 5 accommodates the substrate 3. Here, the housing 5 accommodates the substrate 3 with the flexible portion 32 bent toward the terminal 4 side. The housing 5 of the present embodiment includes a connector block 51 as a main body portion on which a connector 6 constituting a connection portion with the substrate 3, the terminal 4 and the electric wire W is assembled, and the substrate 3 and the terminal 4 assembled with the connector block 51. And a cover 52 as a lid member for covering the like. Both the connector block 51 and the cover 52 are formed of an insulating synthetic resin. In the housing 5, the substrate 3 is assembled in an interior defined by the connector block 51 and the cover 52, and the substrate 3 is accommodated.

  The connector block 51 includes a bottom portion 51a, side wall portions 51b and 51c, support column portions 51d, 51e, 51f, and 51g, connector fitting portions 51h, 51i, and 51j as connection portion fitting portions, and bracket portions 51k and 51l. These are integrally formed.

  The bottom 51a is a bottom body formed in a rectangular plate shape in which the side along the short side direction is the short side and the side along the long side direction is the long side. The bottom portion 51 a is formed in a rectangular plate shape that is slightly larger than the power system rigid portion 33. The bottom 51a is formed with a lightening hole or the like.

  The side wall portions 51b and 51c are wall bodies that are erected vertically along the height direction from the short side of the bottom portion 51a. The side wall parts 51b and 51c are formed in a rectangular plate shape, and extend from one end part in the short side direction of the short side of the bottom part 51a to the other end part. The side wall 51b and the side wall 51c face each other along the long side direction.

  The column portions 51d, 51e, 51f, and 51g are columnar bodies that are erected vertically from the four corners of the bottom portion 51a one by one along the height direction. The column portions 51d, 51e, 51f, and 51g are formed so as to protrude along the height direction, although the shapes are slightly different from each other. Here, the column part 51d and the column part 51e are formed so as to protrude along the height direction from both ends in the short side direction of the side wall part 51b. The support column 51d and the support column 51e face each other along the short side direction. The support column part 51f and the support column part 51g are formed so as to protrude along the height direction from both ends in the short side direction of the side wall part 51c. The support column part 51f and the support column part 51g face each other along the short side direction. Moreover, the support | pillar part 51d and the support | pillar part 51f are formed in the long side of the same side of the bottom part 51a, and are opposed along a long-side direction. The support column 51e and the support column 51g are formed on the long side of the bottom 51a opposite to the support columns 51d and 51f, and face each other along the long side direction.

  The connector fitting portions 51h, 51i, 51j are portions into which the connector 6 that is a connection portion with the electric wire W is fitted. Here, the connector 6 includes a power input connector 61 for inputting power via the electric wire W, a power output connector 62 for outputting power via the electric wire W, and a control signal via the electric wire W. And a control signal connector 63 for transmitting and receiving the signal. The connector fitting portion 51h is for fitting the power input connector 61, the connector fitting portion 51i is for fitting the power output connector 62, and the connector fitting portion 51j is for control signals. The connector 63 is fitted. Here, the power input connector 61, the power output connector 62, and the control signal connector 63 are, for example, so-called vertical connectors.

  The connector fitting parts 51h, 51i, 51j are arranged along the height direction with the power system rigid part 33 in which the terminal 4 is erected among the plurality of rigid parts 31 in a state where the substrate 3 is accommodated in the housing 5. It is formed at an opposing position. More specifically, the connector fitting portion 51h is located at a position facing the region where the terminal 41 is erected in the power supply system rigid portion 33 in the state where the board 3 is accommodated in the housing 5 along the height direction. It is formed. The connector fitting portion 51 i is formed at a position facing the region where the terminal 42 is erected in the power system rigid portion 33 in the state where the substrate 3 is accommodated in the housing 5 along the height direction. The connector fitting portion 51j is formed at a position facing the region where the terminal 43 is erected in the power supply system rigid portion 33 in the state in which the substrate 3 is accommodated in the housing 5 along the height direction. Here, the connector fitting parts 51h, 51i, 51j are formed on the protruding part wall-like part 51m formed on the bottom part 51a. The protruding portion wall-shaped portion 51m is a wall body that protrudes from the bottom portion 51a along the height direction on the same side as the protruding side of the side wall portions 51b and 51c and the column portions 51d, 51e, 51f, and 51g. The protruding portion wall-shaped portion 51m is formed in a substantially rectangular parallelepiped hollow shape, and extends along the long side direction at the edge of the long side of the bottom portion 51a on the side of the column portions 51e and 51g. The connector fitting portions 51h, 51i, 51j are formed as concave portions in a hollow portion on the opposite side to the protruding side of the protruding portion wall-shaped portion 51m. The connector fitting portion 51h is formed as a concave portion having a shape and a size with which the power input connector 61 can be fitted. The connector fitting portion 51i is formed as a concave portion having a shape and a size capable of fitting the power output connector 62. The connector fitting portion 51j is formed as a concave portion having a shape and a size with which the control signal connector 63 can be fitted. Further, the protruding wall 51m is inserted into the front end surface in the height direction, that is, the surface facing the power system rigid portion 33 along the height direction in a state where the substrate 3 is accommodated in the housing 5. A hole (also referred to as a cavity) 51ma (see FIG. 6) is formed. Each terminal 4 is exposed in the connector fitting portions 51h, 51i, and 51j with one end thereof penetrating through the terminal insertion hole 51ma in a state where the substrate 3 is accommodated in the housing 5. Here, the terminal 41 is exposed in the connector fitting portion 51h through the terminal insertion hole 51ma of the protruding portion wall-shaped portion 51m. The terminal 42 is exposed in the connector fitting part 51i through the terminal insertion hole 51ma of the protruding part wall-like part 51m. The terminal 43 is exposed in the connector fitting portion 51j through the terminal insertion hole 51ma of the protruding portion wall-like portion 51m. The power input connector 61 is electrically connected to the terminal 41 exposed in the connector fitting portion 51h by fitting in the connector fitting portion 51h. The power output connector 62 is electrically connected to the terminal 42 exposed in the connector fitting portion 51i by fitting in the connector fitting portion 51i. The control signal connector 63 is electrically connected to the terminal 43 exposed in the connector fitting portion 51j by fitting in the connector fitting portion 51j. In the following description, the power input connector 61, the power output connector 62, and the control signal connector 63 are simply referred to as the connector 6 when there is no need to distinguish them.

  The bracket portions 51k and 51l are for fixing the housing 5 to the vehicle body or the like of the vehicle. The bracket portions 51k, 51l protrude in a plate shape from the long side of the bottom portion 51a on the support column portions 51e, 51g side, that is, the long side on the side where the protruding portion wall-shaped portion 51m is provided, and the tip portion has an arc shape. As well as being formed, fastening holes 51n and 51o are formed. Here, the bracket part 51k is formed at the end on the column part 51e side, and the bracket part 51l is formed on the end on the column part 51g side. The fastening holes 51n and 51o penetrate in the height direction. The bracket 5 is fixed to the fixing part on the vehicle body side by inserting a fastening member such as a bolt into the fastening holes 51n and 51o and fastening the casing 5 to the fixing part on the vehicle body side.

  In the connector block 51 configured as described above, one end portion of each terminal 4 is inserted and held in a terminal insertion hole 51ma (see FIG. 6) formed in the distal end surface of the protruding wall-like portion 51m, and a connector fitting portion. With the terminals 51h, 51i, and 51j exposed, the other end portions of the terminals 4 are inserted into the through holes 33b (see FIGS. 2, 3, and 4) of the power system rigid portion 33 and soldered. In this state, in the substrate 3, the power system rigid portion 33 faces the protruding portion wall-shaped portion 51m along the height direction, the long side of the power system rigid portion 33 is along the long side direction, and the short side is the short side direction. , And the power supply system rigid portion 33 is assembled to the connector block 51 in such a positional relationship that the flexible portion 32 is along the long side of the column portions 51d and 51f. In this case, in the substrate 3, the positioning projection 51q formed at the tip of the support column 51e is inserted into the positioning hole 51p formed in one corner of the power supply system rigid portion 33 opposite to the flexible portion 32 side. Is positioned. And the board | substrate 3 inserts the screws 71 and 72 into the screw holes 51r and 51s formed in the both corners of the flexible part 32 side of the power system rigid part 33, and the said screws 71 and 72 are the tips of the column parts 51d and 51f. Are fixed to the column portions 51d, 51e, 51f, 51g. In the substrate 3, the flexible portion 32 is bent toward the terminal 4, that is, the control system rigid portion 34 is bent toward the support column portions 51d and 51f with respect to the power supply system rigid portion 33. The flexible portion 32 of the board 3 is bent so that the power system rigid portion 33 and the control system rigid portion 34 are substantially perpendicular, and the long side of the control system rigid portion 34 is along the long side direction and the short side is the height direction. The control system rigid portion 34 is assembled to the connector block 51 in such a positional relationship as follows. That is, the board | substrate 3 is comprised by the substantially L shape as a whole in the cross sectional view (refer FIG. 6) along a short side direction because the flexible part 32 bends. In this case, the board 3 has screws 73 and 74 inserted into screw holes 51v and 51w formed at opposite corners of the control system rigid part 34 on the opposite side to the flexible part 32 side. By being fastened to fastening holes 51x and 51y formed in the base end portions of 51d and 51f (in other words, base end portions on the side surfaces of the side wall portions 51b and 51c), the side portions of the support portions 51d and 51f are fixed. The In this way, the board 3 is assembled to the connector block 51 with the flexible portion 32 bent so that the power system rigid portion 33 and the control system rigid portion 34 are substantially vertical. In this state, the substrate 3 has the power system rigid part 33 along the direction perpendicular to the height direction, the control system rigid part 34 along the direction perpendicular to the short side direction, and the power system rigid part 33 is the protruding wall. The control system rigid portion 34 is positioned so as to face the shape portion 51m along the height direction, and is positioned on the outer side in the short side direction of the support column portions 51d and 51f.

  The cover 52 covers the substrate 3 and the like assembled to the connector block 51 from the side opposite to the connector block 51. The cover 52 includes a rectangular frame-shaped portion 52a as a wall formed in a substantially square shape, and a ceiling portion 52b that closes one opening of the rectangular frame-shaped portion 52a. The ceiling part 52b is a ceiling body formed in a rectangular plate shape in which a side along the short side direction is a short side and a side along the long side direction is a long side. The ceiling part 52b is formed in a rectangular plate shape that is slightly larger than the bottom part 51a. The rectangular frame-shaped part 52a is formed so as to stand on the edge of the ceiling part 52b. The rectangular frame-shaped part 52a includes a pair of long side wall surfaces 52c and 52d along the long side direction of the ceiling part 52b, and a pair of short side wall surfaces 52e and 52f along the short side direction of the ceiling part 52b. Formed with. The cover 52 is formed in a rectangular cylindrical shape having one end opened and the other end closed by the rectangular frame-shaped portion 52a and the ceiling portion 52b. The cover 52 is attached to the connector block 51 in such a positional relationship as to cover the substrate 3 or the like assembled to the connector block 51 from the side opposite to the connector block 51. When the cover 52 is attached to the connector block 51, the long side wall surfaces 52 c and 52 d and the short side wall surfaces 52 e and 52 f constituting the rectangular frame-shaped portion 52 a are the side wall portions 51 b and 51 c of the connector block 51 and the column portions. 51d, 51e, 51f, 51g, located outside the control system rigid part 34. The cover 52 is locked to the connector block 51 via various locking mechanisms while being attached to the connector block 51. Here, in the cover 52, the engaging recess 52g provided on the short side wall surfaces 52e and 52f on the cover 52 side and the claw portion 51z provided on the side wall portions 51b and 51c on the connector block 51 side are engaged. Thus, the connector block 51 is engaged, and the connector block 51 is detachably assembled.

  The housing 5 is configured as described above, and accommodates the substrate 3 in a state where the flexible portion 32 is bent toward the terminal 4 side. More specifically, the housing 5 is an interior partitioned by the connector block 51 and the cover 52 in a state where the plurality of rigid portions 31 are arranged along different wall surfaces that respectively form the internal space portion of the housing 5. The board | substrate 3 is accommodated in the space part side (refer FIG. 6 etc.). Here, in the housing 5, the power system rigid portion 33 among the plurality of rigid portions 31 is arranged along the ceiling portion 52 b of the cover 52, and the control system rigid portion 34 among the plurality of rigid portions 31 is the length of the cover 52. The board | substrate 3 is accommodated in the internal space part side in the state arrange | positioned along the side wall surface 52c. In the state in which the substrate 3 is accommodated in the housing 5, the power system rigid portion 33 faces the ceiling portion 52b along the height direction, and the control system rigid portion 34 extends along the short side direction to the long side wall surface. 52c.

  And each terminal 4 of this embodiment is located in the outer side in one of the some rigid parts 31, here, the power system rigid part 33, and the housing | casing 5 comprised as mentioned above is provided. The layout is designed to reduce the size of the unit by effectively using the space inside and saving space.

  Specifically, each terminal 4 is located closer to the opposite side of the flexible part 32 in the power system rigid part 33 (see FIGS. 2, 5, 6, etc.). In other words, the through hole 33 b into which one end of each terminal 4 is inserted is located closer to the opposite side of the flexible part 32 in the power system rigid part 33. Here, the case where the power supply system rigid portion 33 is located on the opposite side of the flexible portion 32 includes the case where most of the plurality of terminals 4 are located on the opposite side of the flexible portion 32. Here, typically, most of the plurality of terminals 4 and the through holes 33b are mainly the center position C of the power supply system rigid portion 33 (here, the center position in the short side direction (see FIGS. 5 and 6, etc.)). It is located closer to the end opposite to the flexible portion 32, that is, the outer end opposite to the flexible portion 32 and the control system rigid portion 34.

  Each terminal 4 is positioned closer to the opposite side of the flexible part 32 in the power system rigid part 33, so that an accommodation space part 53 for accommodating the electronic component 2 between the board 3 and the housing 5 is provided. (See FIG. 2, FIG. 6, etc.) The accommodating space 53 is formed in each terminal 4 with respect to the short side direction (the direction in which the power supply system rigid portion 33 and the flexible portion 32 are arranged) in the internal space portion of the housing 5 partitioned by the connector block 51 and the cover 52. More on the flexible part 32 side, the wall surface of the housing 5, here, the ceiling part 52b, the long side wall surface 52c, the short side wall surfaces 52e, 52f and the like are formed. In other words, the accommodating space 53 is a protruding wall shape that is a wall that forms the connector fitting portions 51h, 51i, 51j in the internal space of the housing 5 partitioned by the connector block 51 and the cover 52. It is partitioned between the portion 51m and the ceiling portion 52b, the long side wall surface 52c, the short side wall surfaces 52e, 52f and the like. Here, the accommodation space portion 53 is formed as a space portion having a substantially L-shaped cross section in a cross-sectional view along the short side direction (see FIG. 6). The electronic component 2 mounted on the rigid portion 31, here, the heat generating component 21 mounted on the power system rigid portion 33 and the heat-fragile component 22 mounted on the control system rigid portion 34 are accommodated in the accommodating space 53. Is done.

  Further, in the electronic component unit 1 of the present embodiment, the lock release portions 61a, 62a, 63a as release portions for releasing the fitting between the connector 6 and the connector fitting portions 51h, 51i, 51j are provided on the housing space portion 53 side. Located (see FIG. 2, FIG. 6, etc.). Here, the lock release portion 61a is an arm-like member provided in the power input connector 61, and is positioned on the accommodation space portion 53 side in a state where the power input connector 61 is fitted in the connector fitting portion 51h. The distal end portion is exposed from the connector fitting portion 51h. The unlocking portion 61a bends by being pinched with a finger or the like, releases the fitting state between the power input connector 61 and the connector fitting portion 51h, and can remove the power input connector 61 from the connector fitting portion 51h. And The lock release portion 62a is an arm-like member provided in the power output connector 62, and is positioned on the housing space 53 side with the power output connector 62 fitted in the connector fitting portion 51i, and has a distal end portion. It is exposed from the connector fitting part 51i. The unlocking portion 62a bends when pinched with a finger or the like, releases the fitting state between the power output connector 62 and the connector fitting portion 51i, and can remove the power output connector 62 from the connector fitting portion 51i. And The lock release portion 63a is an arm-like member provided in the control signal connector 63, and is positioned on the accommodating space portion 53 side in a state where the control signal connector 63 is fitted in the connector fitting portion 51j, and the distal end portion thereof. It is exposed from the connector fitting part 51j. The unlocking portion 63a bends by being pinched with a finger or the like, releases the fitting state between the control signal connector 63 and the connector fitting portion 51j, and can remove the control signal connector 63 from the connector fitting portion 51j. And In other words, the lock release portions 61 a, 62 a, and 63 a are positioned facing the control system rigid portion 34 side in a state where the substrate 3 is accommodated in the housing 5. Here, the lock release parts 61a, 62a, and 63a face the heat-fragile part 22 that is the electronic part 2 mounted on the control system rigid part 34 and located in the accommodation space part 53 along the short side direction.

  And the flexible part 32 of the board | substrate 3 of this embodiment is easy to handle by forming so that the range where the angle θ shown in FIG. 8 is 0 ° or more and 7.5 ° or less is an elastic region. Is secured.

  Here, the angle θ is an angle formed by one rigid portion 31 to which the flexible portion 32 is connected and the other rigid portion 31. More specifically, the angle θ corresponds to the main surface (mounting surface 33a) of the power system rigid portion 33 that is one rigid portion 31 and the main surface (mounting surface 34a) of the control system rigid portion 34 that is the other rigid portion 31. Is the angle between The angle θ is based on the state in which the long side of the power system rigid part 33 and the long side of the control system rigid part 34 face each other and the principal surfaces thereof are parallel to each other, that is, the flexible part 32 is not bent. The state becomes 0 °.

  FIG. 9 is a diagram showing the relationship between the angle θ of the substrate 3 and the required load for bending the flexible portion 32 to the angle θ. In FIG. 9, the horizontal axis is an angle θ [° (angle)], and the vertical axis is a load required to bend the flexible portion 32 to the angle θ and acts on the central portion of one rigid portion 31. Load (necessary load) [N]. The substrate 3 is in an elastic region where the required load increases linearly and linearly with respect to the angle θ when the flexible portion 32 is bent in a range where the angle θ is in the range of [0 ° ≦ θ ≦ 7.5 °]. The flexible part 32 is in an elastically deformed state. On the other hand, the substrate 3 is necessary in a state where the flexible portion 32 is bent until the angle θ exceeds 7.5 °, that is, in a state where the flexible portion 32 is bent in the range of the angle θ of [7.5 ° <θ]. The load is in a plastic region where the load increases nonlinearly with respect to the angle θ, and the flexible portion 32 is in a state of plastic deformation. Further, the required load of the substrate 3 becomes the maximum value when the angle θ is about 20 °, and thereafter, the required load becomes almost constant even when the angle θ increases. In the flexible part 32 of the present embodiment, the flexible part 32 is bent so that the substrate 3 is accommodated in the housing 5, here, the power system rigid part 33 and the control system rigid part 34 are substantially vertical. In the state, that is, in the state where the angle θ is [θ≈90 °], the angle θ is within the range of the plastic region. That is, the flexible portion 32 is formed so as to be an elastic region before being assembled to the housing 5 and to be a plastic region after being assembled to the housing 5.

  Here, the elastic region / plastic region of the flexible part 32 is adjusted by adjusting the proportion of the conductor in the flexible part 32. That is, the flexible part 32 has the wiring pattern 3b (see FIG. 7, FIG. 10, etc.) of the flexible part 32 with respect to the entire volume of the flexible part 32 (the total volume of the insulating layer 3a and the conductor constituting the wiring pattern 3b). The elastic region is adjusted by adjusting the proportion of the volume of the constituent conductor (for example, when the conductor is copper, it may be referred to as “residual copper ratio”). The flexible portion 32 tends to have a relatively wide elastic region as the proportion of the conductors constituting the wiring pattern 3b increases. Further, in the flexible part 32 of this embodiment, the insulating layer 3a and the wiring pattern 3b are formed in one layer, but here, as shown in FIG. 10, a power source is used as a conductor constituting the wiring pattern 3b. A connection conductor 3ba that electrically connects the system rigid portion 33 and the control system rigid portion 34, and a power supply system rigid portion 33 and a grounding conductor 3bb for grounding the control system rigid portion 34 are configured. In other words, the elastic range of the flexible portion 32 is adjusted by adjusting the ratio of the total conductors of the connection conductor 3ba and the grounding conductor 3bb.

  The substrate 3 described above includes a plurality of rigid portions 31 on which the electronic component 2 is mounted, and a flexible portion 32 that is more flexible than the rigid portion 31 and electrically connects the plurality of rigid portions 31. . The electronic component unit 1 described above includes the substrate 3 and the housing 5 that accommodates the substrate 3 in a state where the flexible portion 32 is bent. The flexible portion 32 has an elastic range in which an angle θ formed by at least one rigid portion 31 to which the flexible portion 32 is connected and the other rigid portion 31 is not less than 0 ° and not more than 7.5 °.

  Therefore, in the substrate 3 and the electronic component unit 1, the flexible portion 32 that electrically connects the plurality of rigid portions 31 has an angle θ between at least one rigid portion 31 and the other rigid portion 31 of 0 ° or more. Since the range of 5 ° or less is formed to be an elastic region, the flexible portion 32 is plastic until the angle θ formed by one rigid portion 31 and the other rigid portion 31 exceeds 7.5 °. Since it can be prevented from being deformed, it is possible to ensure ease of handling.

  For example, the substrate and the electronic component unit do not bend because the flexible part may be plastically deformed even if it is slightly bent, and if it does not return to its original shape, it may be difficult to perform the subsequent assembly process. It is necessary to handle it and it becomes complicated. On the other hand, the substrate 3 and the electronic component unit 1 according to the present embodiment do not plastically deform until the angle θ exceeds 7.5 °, and return to the original shape even when elastically deformed. Can be. As a result, the board 3 and the electronic component unit 1 can return to their original shapes even if the board 3 is bent somewhere when the board 3 is assembled to the housing 5, for example. It can be suppressed that it becomes difficult to peel, and variations in construction can be absorbed to some extent, and handling can be facilitated.

  Furthermore, according to the substrate 3 and the electronic component unit 1 described above, the flexible portion 32 includes the one rigid portion 31 to which the flexible portion 32 is connected and the other in the state where the substrate 3 is accommodated in the housing 5. An angle θ formed by the rigid portion 31 is within the range of the plastic region. Therefore, according to the substrate 3 and the electronic component unit 1, the flexible portion 32 does not attempt to return to the original shape because the flexible portion 32 is plastically deformed when the substrate 3 is accommodated in the housing 5. The substrate 3 can be easily accommodated in the housing 5 in an appropriate shape.

  Furthermore, according to the board | substrate 3 and the electronic component unit 1 which were demonstrated above, the elastic part adjusts the flexible part 32 by the ratio of the conductor in the said flexible part 32 being adjusted. Therefore, the board 3 and the electronic component unit 1 can adjust the elastic region and the plastic region of the flexible part 32 to an appropriate balance by adjusting the proportion of the conductor in the flexible part 32, and the angle θ is 0. The flexible portion 32 can be formed to have an elastic region in a range of from ° to 7.5 °.

  Furthermore, according to the board | substrate 3 and the electronic component unit 1 which were demonstrated above, the flexible part 32 is connecting conductor 3ba which electrically connects one rigid part 31 and the other rigid part 31 which the said flexible part 32 connects. And a grounding conductor 3bb for grounding the rigid portion 31. The board 3 and the electronic component unit 1 are mounted on a control system rigid part 34 which is the other rigid part 31 connected to the power system rigid part 33 which is one rigid part 31 via the flexible part 32. Since the component 2 is of the control system, for example, the connecting conductor 3ba that connects the power system rigid section 33 and the control system rigid section 34 at the flexible section 32 may be a signal line and tends to have a relatively small cross section. It is in. In this case, when adjusting the ratio of the conductor in the flexible part 32 and adjusting the elastic region of the flexible part 32, the board 3 and the electronic component unit 1 are desired because the amount of conductor in the flexible part 32 is too small with only the connection conductor 3ba. There is a possibility that it cannot be set in the elastic range. In particular, the substrate 3 and the electronic component unit 1 of the present embodiment have a remarkable tendency because the wiring pattern 3b constituting the flexible portion 32 is a single layer. On the other hand, in the electronic component unit 1 of the present embodiment, the conductor for grounding 3bb is also applied as the conductor constituting the wiring pattern 3b of the flexible portion 32 in addition to the connection conductor 3ba. When the connection conductor 3ba is not sufficient, the amount of the grounding conductor 3bb is adjusted, thereby adjusting the proportion of the conductor in the flexible portion 32 to a desired proportion and adjusting the elastic region of the flexible portion 32 to a desired range. be able to.

  The electronic component unit 1 to which the substrate 3 is applied and the wire harness WH to which the electronic component unit 1 is applied have a plurality of rigid portions 31 connected via the flexible portion 32 and the flexible portion. Since the board | substrate 3 can be accommodated in the housing | casing 5 in the state which 32 bent, the whole unit can be made low-profile. In the electronic component unit 1 and the wire harness WH, the terminal 4 for connecting the connector 6 to the electric wire W and the substrate 3 is erected linearly from one of the plurality of rigid portions 31 and the terminal 4 is rigid. In order to accommodate the electronic component 2 mounted on the rigid portion 31 in the space between the terminal 4 and the substrate 3 in the housing 5 by being positioned close to the side of the flexible portion 32 in the portion 31. Therefore, it is possible to effectively use the electronic component 2 in the housing 5 to save space. As a result, the electronic component unit 1 and the wire harness WH can be reduced in size.

  Also, the electronic component unit 1 and the wire harness WH are such that each terminal 4 is erected in a straight line from one of the plurality of rigid portions 31. For example, the terminal 4 is bent in an L shape. In comparison, the terminals 4 can be shared as much as possible, and the number of required types of the shapes of the terminals 4 can be suppressed. Moreover, since the electronic component unit 1 and the wire harness WH can make each terminal 4 perpendicular | vertical with respect to the rigid part 31, compared with the case where the terminal 4 bends in an L shape, for example, full length Can be shortened, and cost reduction and weight reduction can be achieved. Thereby, the electronic component unit 1 and the wire harness WH can suppress manufacturing cost, for example.

  In addition, the board | substrate for electronic component units which concerns on embodiment of this invention mentioned above, and an electronic component unit are not limited to embodiment mentioned above, A various change is possible in the range described in the claim. .

  In the above description, the electronic component unit 1 has been described as what is called power integration, but is not limited thereto.

  In the above description, the plurality of rigid portions 31 have been described as including the power supply system rigid portion 33 as the first mounting portion and the control system rigid portion 34 as the second mounting portion. Not limited to this, it may be configured to include three or more. In the above description, the board 3 is provided with the terminal 4 for inputting / outputting electric power and the heat generating component 21 that easily generates heat in the power supply system rigid portion 33, while the heat-fragile component 22 having low durability against heat is controlled by the control system rigid. Although it has been described that the region where the main heat generation source is provided and the region where the heat-sensitive component is provided are divided and divided (zoning) on the substrate 3 by being provided in the portion 34, the present invention is not limited thereto.

  In the above description, the substrate 3 has a cross-sectional view along the short side direction (see FIG. 6) because the flexible portion 32 is bent so that the power system rigid portion 33 and the control system rigid portion 34 are substantially vertical. However, the present invention is not limited to this. The substrate 3 only needs to be accommodated in the housing 5 with at least the flexible portion 32 bent to the terminal 4 side, and the angle formed by the power system rigid portion 33 and the control system rigid portion 34 may be an obtuse angle or an acute angle. Good. Even in this case, in the flexible portion 32, the angle θ formed by one rigid portion 31 and the other rigid portion 31 to which the flexible portion 32 is connected in a state where the substrate 3 is accommodated in the housing 5 is in the range of the plastic region. It is preferable to be within.

  In the above description, the lock release portions 61a, 62a, and 63a for releasing the fitting between the connector 6 and the connector fitting portions 51h, 51i, and 51j are described as being located on the housing space portion 53 side. For example, it may face the outside of the housing 5.

1 Electronic component unit 2 Electronic component 3 Substrate (Electronic component unit substrate)
3a Insulating layer 3b Wiring pattern 3ba Connection conductor 3bb Grounding conductor 5 Housing 6 Connector 31 Rigid part (mounting part)
32 Flexible part (bent part)

Claims (6)

A plurality of mounting parts on which electronic components are mounted;
A bending portion that is more flexible than the mounting portion and electrically connects the plurality of mounting portions;
The bent portion is characterized in that the range in which the angle formed by at least one mounting portion to which the bent portion is connected and the other mounting portion is 0 ° or more and 7.5 ° or less is an elastic region,
Electronic component unit substrate. In the state where the bent portion is accommodated in the housing, an angle formed by one of the mounting portions to which the bent portion is connected and the other mounting portion is within a plastic range.
The electronic component unit substrate according to claim 1. The elastic part is adjusted by adjusting the proportion of the conductor in the bent part.
The electronic component unit substrate according to claim 1. The bent portion includes a connection conductor that electrically connects the one mounting portion to which the bent portion is connected and the other mounting portion, and a grounding conductor for grounding the mounting portion. The
The electronic component unit substrate according to any one of claims 1 to 3. A plurality of mounting portions on which electronic components are mounted, and a substrate having a bent portion that is more flexible than the mounting portion and electrically connects the plurality of mounting portions;
A housing that accommodates the substrate in a state in which the bent portion is bent,
The bent portion is characterized in that the range in which the angle formed by at least one mounting portion to which the bent portion is connected and the other mounting portion is 0 ° or more and 7.5 ° or less is an elastic region,
Electronic component unit. In the bent portion, in the state where the substrate is accommodated in the housing, an angle formed by one of the mounting portions to which the bent portion is connected and the other mounting portion is within a plastic range.
The electronic component unit according to claim 5.

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