JP2020080033A - Electronic device - Google Patents

Abstract

To provide an electronic device having a novel structure capable of further suppressing bending of a substrate.SOLUTION: An electronic device of an embodiment includes a housing, a substrate, and a reinforcing structure. The housing has a bottom wall and a first side wall extending from the bottom wall in a first direction intersecting the bottom wall. The substrate is housed in the housing and is provided in parallel with the bottom wall with a gap in the first direction. The reinforcing structure includes an intermediate wall provided between the bottom wall and the substrate in parallel with the bottom wall and having a first end coupled to the first side wall, a standing wall protruding from a second end opposite to the first end of the intermediate wall in the opposite direction to the first direction and coupled to the bottom wall, a plurality of first support columns interposed between the bottom wall and the intermediate wall and extending in the first direction, and a plurality of second support columns interposed between the intermediate wall and the substrate and extending in the first direction.SELECTED DRAWING: Figure 2

Description

  Embodiments of the present invention relate to electronic devices.

  Conventionally, a casing having a bottom wall, a substrate housed in the casing and provided in parallel with the bottom wall at a distance in the first direction, and provided between the bottom wall and the substrate in parallel with the bottom wall. An electronic device including a reinforcing member having an intermediate wall that supports a substrate is known.

JP 2001-148578 A

  In this type of electronic device, it would be beneficial if a new structure capable of further suppressing the bending of the substrate could be obtained.

  The electronic device of the embodiment includes a housing, a substrate, and a reinforcing structure. The housing has a bottom wall and a first side wall extending from the bottom wall in a first direction intersecting the bottom wall. The substrate is housed in the housing and is provided in parallel with the bottom wall with a gap in the first direction. The reinforcing structure is provided between the bottom wall and the substrate in parallel with the bottom wall and has an intermediate wall having a first end coupled to the first side wall, and an intermediate wall opposite to the first end of the intermediate wall. A standing wall protruding from the second end in a direction opposite to the first direction and coupled to the bottom wall, a plurality of first support columns interposed between the bottom wall and the intermediate wall and extending in the first direction, the intermediate wall and the substrate. And a plurality of second columns extending in the first direction between the first column and the second column.

FIG. 1 is an exemplary perspective view of an electronic device according to an embodiment. FIG. 2 is an exemplary and schematic YZ sectional view of the electronic device of the embodiment. FIG. 3 is an exemplary plan view of the fan unit of the electronic device of the embodiment. FIG. 4 is an exemplary XZ sectional view of a part of the duct member of the electronic device of the embodiment. FIG. 5 is an exemplary and schematic YZ cross-sectional view of the electronic device of the modification.

  Hereinafter, exemplary embodiments and modifications of the present invention will be disclosed. The configurations of the embodiments and modified examples shown below, and the actions and effects provided by the configurations are examples. The present invention can be realized by a configuration other than the configurations disclosed in the following embodiments and modifications. Further, according to the present invention, it is possible to obtain at least one of various effects (including derivative effects) obtained by the configuration.

  In addition, similar constituent elements are included in the embodiments and modifications disclosed below. Therefore, in the following, common reference numerals are given to those similar components, and duplicate description is omitted. In the present specification, the ordinal numbers are used only for distinguishing parts, members, parts, positions, directions, etc., and do not indicate the order or priority.

[Embodiment]
FIG. 1 is a perspective view of the electronic device 1. In each of the following drawings, three directions orthogonal to each other are defined for convenience. The X direction is along the depth (front-back direction) of the electronic device 1, the Y direction is along the width (left-right direction) of the electronic device 1, and the Z direction is along the height (up-down direction) of the electronic device 1. The Z direction is an example of the first direction, the X direction is an example of the second direction, and the Y direction is an example of the third direction.

  As shown in FIG. 1, the electronic device 1 is a rack-mount type industrial computer, and includes a housing 2 provided with a reinforcing structure 3. The housing 2 accommodates a fan unit 4, a substrate 5, an auxiliary storage device 6, a power supply device 7, an external storage device 8, a RAID (redundant arrays of inexpensive disks) module 9, a duct member 10, and the like. The electronic device 1 is not limited to this example, and includes a desktop personal computer, a video display device, a television receiver, a game machine, a video display control device, an information storage device, and various other types provided with the substrate 5. Can be configured as the electronic device 1.

  As shown in FIG. 1, the housing 2 has a rectangular parallelepiped box shape that is thin in the Z direction. The housing 2 has a plurality of wall portions such as a bottom wall 2a, a top wall 2b (see FIG. 2), a front wall 2c, a left wall 2d, a rear wall 2e, and a right wall 2f. The bottom wall 2a is also called a lower wall or the like, and the top wall 2b is also called an upper wall or the like. The front wall 2c, the left wall 2d, the rear wall 2e, and the right wall 2f are also referred to as side walls and peripheral walls.

  Both the bottom wall 2a and the top wall 2b extend along a direction (XY plane) orthogonal to the Z direction, and are provided in parallel with each other with a gap in the Z direction. The bottom wall 2a is provided with a plurality of support portions that project in the opposite direction of the Z direction and that support the housing 2 in a state of being separated from a shelf, a desk, a table, or other mounting portion (not shown). Further, the bottom wall 2a is joined to the reinforcing plate 31 of the reinforcing structure 3 described later by a plurality of couplers 35 penetrating in the Z direction. The coupler 35 is a blind rivet or the like.

  Each of the left wall 2d and the right wall 2f extends along a direction (XZ plane) orthogonal to the Y direction, and is provided in parallel with each other at intervals in the Y direction. The left wall 2d extends between the ends of the bottom wall 2a and the top wall 2b in the Y direction, and the right wall 2f extends between the ends of the bottom wall 2a and the top wall 2b in the opposite Y direction. .. The left wall 2d is connected to a reinforcing plate 31 described later by a plurality of connecting members 35 such as blind rivets that penetrate in the Y direction. The left wall 2d is an example of a first side wall.

  Both the front wall 2c and the rear wall 2e extend along a direction (YZ plane) orthogonal to the X direction, and are provided in parallel with each other with a space in the X direction. The front wall 2c extends between the ends of the bottom wall 2a and the top wall 2b in the opposite X direction, and the rear wall 2e extends between the ends of the bottom wall 2a and the top wall 2b in the X direction. .. A fan unit 4 described later is attached to the inside of the front wall 2c. Further, the rear wall 2e is connected to a reinforcing plate 31 described later by a connecting tool (not shown). The front wall 2c is an example of a second side wall, and the rear wall 2e is an example of a third side wall and a first side wall.

  Further, the front wall 2c is provided with an intake port 2r and a plurality of openings 2s. The intake port 2r is arranged in the opposite direction to the fan unit 4 in the X direction. The intake port 2r is configured as a portion where a plurality of small holes 2r1 provided in the front wall 2c are gathered. The opening 2s is provided so as to be displaced in the direction opposite to the Y direction of the intake port 2r. The opening 2s is arranged in the direction opposite to the X direction with respect to each of the auxiliary storage device 6 and the external storage device 8.

  Further, the rear wall 2e is provided with an exhaust port 2k. The exhaust port 2k is configured as a portion where a plurality of small holes 2k1 provided in the rear wall 2e are gathered. The exhaust port 2k is a housing for the cooling air (air flow) of the fan unit 4 that exchanges heat with the heat sink 9c of the RAID module 9 and the heat sinks 11 and 12 (see FIGS. 3 and 4) mounted on the substrate 5. 2 Can be discharged outside.

  Further, the housing 2 is configured by combining a plurality of parts (divided bodies). Specifically, the housing 2 has a case 21 and a cover 22 (see FIG. 2). The cover 22 has at least the top wall 2b and parts of the left wall 2d and the right wall 2f (outer side portions). The cover 22 is surrounded by the bottom wall 2a, the front wall 2c, the left wall 2d, the rear wall 2e, and the right wall 2f, and covers the housing portion 2g of the case 21 opened in the Z direction. The cover 22 may be provided with a beam or the like extending between the left wall 2d and the right wall 2f.

  Further, the case 21 has at least a bottom wall 2a, a part (inner portion) of the left wall 2d and the right wall 2f, and a front wall 2c and a rear wall 2e. The case 21 and the cover 22 are coupled to each other by a coupling tool such as a screw. The housing 2 is made of a metal material such as stainless steel.

  As shown in FIG. 1, the auxiliary storage device 6 is located inside the housing 2 at a corner between the front wall 2c and the right wall 2f. The auxiliary storage device 6 is an HDD (hard disk drive), an SSD (solid state drive), or the like. In the present embodiment, the three auxiliary storage devices 6 are arranged side by side in the Y direction so as to overlap each other. The auxiliary storage device 6 is fixed to the front wall 2c in a state in which the ends in the opposite directions to the X direction are exposed from the opening 2s.

  The external storage device 8 is located in the housing 2 between the auxiliary storage device 6 and the fan unit 4. The external storage device 8 is an ODD (optical disk drive) or the like. Like the auxiliary storage device 6, the external storage device 8 is fixed to the front wall 2c in a state where the end portion in the opposite direction to the X direction is exposed from the opening 2s.

  The power supply device 7 is located inside the housing 2 at a corner between the rear wall 2e and the right wall 2f. In other words, the power supply device 7 is arranged side by side with the auxiliary storage device 6 in the X direction. The power supply device 7 has a fan or the like (not shown) that cools the inside of the power supply device 7.

  The substrate 5 is formed in a rectangular plate shape that is provided in parallel with the bottom wall 2a with a gap in the Z direction. The substrate 5 is located inside the housing 2 close to the corner between the rear wall 2e and the left wall 2d. In other words, the size of the substrate 5 is smaller than the size of the bottom wall 2a. The substrate 5 is supported by the bottom wall 2a via a reinforcing structure 3 described later. The board 5 and the reinforcing structure 3 are arranged in the Y direction along with the power supply device 7, and are arranged in the X direction along with the fan unit 4 (front wall 2c). The board 5 may also be referred to as a main board, a first board, a circuit board, a control board, or the like.

  The RAID module 9 is mounted in the expansion slot 5c provided in the board 5. The RAID module 9 has a substrate 9a provided in parallel with the left wall 2d at a distance. The board 9a partitions the housing portion 2g in the case 21 in the Y direction. The substrate 9a may also be referred to as a sub substrate, a second substrate, or the like.

  Further, the RAID module 9 has a controller 9b mounted on the surface of the board 9a in the Y direction and a heat sink 9c mounted on the surface of the controller 9b opposite to the board 9a. The controller 9b and the heat sink 9c are aligned with at least a part of the fan unit 4 in the X direction. The board 5 is provided with a plurality of expansion slots 5d in which PCI (peripheral component interconnect) modules and the like are mounted.

  A plurality of electronic components such as a PCH 13 (platform controller hub) and a CPU 14 (central processing unit, which will be described later, see FIGS. 2 and 3) are mounted on the upper surface 5a of the substrate 5 in the Z direction. At least a part of the control circuit of the electronic device 1 is configured by the wiring in the substrate 5 and the plurality of electronic components.

  The heat sink 11 is attached to the upper surface of the PCH 13. The heat sink 11 and the PCH 13 are aligned with at least a part of the fan unit 4 in the X direction. The heat sink 11 has a plurality of fins arranged in the X direction and the Y direction with a gap therebetween. The heat sink 12 is also attached to the upper surface of the CPU 14 (see FIG. 3). The CPU 14 is located in the direction opposite to the Y direction of the PCH 13.

  The duct members 10 are aligned with the PCH 13 in the direction opposite to the Y direction with a space therebetween, and are also aligned with the CPU 14 in the Z direction with a space therebetween. In other words, the duct member 10 covers the CPU 14 from the side opposite to the bottom wall 2a of the substrate 5. The duct member 10 is provided between the fan unit 4 and the exhaust port 2k provided in the rear wall 2e. The exhaust port 2k is an example of an opening.

  Next, the reinforcing structure 3 will be described in more detail. FIG. 2 is a schematic YZ sectional view of the electronic device 1. As shown in FIG. 2, the reinforcing structure 3 includes a reinforcing plate 31, a plurality of studs 32 and a coupling tool 36, and a plurality of studs 33 and a coupling tool 37. Note that, in FIG. 2, the duct member 10 is not shown for convenience.

  The reinforcing plate 31 has an intermediate wall 31a, a standing wall 31b, and a protruding wall 31c. The intermediate wall 31a has a rectangular plate shape provided in parallel with the bottom wall 2a. The intermediate wall 31a is located between the bottom wall 2a and the substrate 5, and faces the bottom wall 2a and the substrate 5 with a space therebetween. The size of the intermediate wall 31a is substantially the same as or slightly larger than the size of the substrate 5. The reinforcing plate 31 is made of a metal material such as aluminum which is lighter than the housing 2.

  Further, the intermediate wall 31a has a left end 31a1, a rear end 31a2, a right end 31a3, and a front end 31a4 as four ends (sides). The rear end portion 31a2 is in contact with the rear wall 2e inside the housing 2, and is coupled to the rear wall 2e by a coupling tool such as a blind rivet (not shown). The rear end portion 31a2 is an example of the first end portion.

  The protruding wall 31c is provided at the left end portion 31a1 of the intermediate wall 31a. The protruding wall 31c protrudes in the Z direction from the intermediate wall 31a and extends in the X direction. The protruding wall 31c is overlapped with the left wall 2d inside the housing 2, and is connected to the left wall 2d by the above-described connecting tool 35. The left end portion 31a1 is an example of the first end portion.

  The standing wall 31b is provided on each of the right end portion 31a3 and the front end portion 31a4 (see FIG. 4) of the intermediate wall 31a. The standing wall 31b projects from the intermediate wall 31a in the opposite direction to the Z direction, and is bent along the bottom wall 2a at a position apart from the intermediate wall 31a. The standing wall 31b is overlapped with the bottom wall 2a inside the housing 2, and is joined to the bottom wall 2a by the above-described joining tool 35. The right end 31a3 is an example of a second end of the intermediate wall 31a opposite to the left end 31a1. The front end 31a4 is an example of a second end opposite to the rear end 31a2 of the intermediate wall 31a. The standing wall 31b (see FIGS. 1 and 4) of the front end portion 31a4 is an example of a first standing wall facing the front wall 2c.

  As shown in FIG. 2, the stud 32 is interposed between the bottom wall 2a and the intermediate wall 31a and extends in the Z direction. In this embodiment, a plurality of studs 32 are provided at intervals in the Y direction and the X direction of the bottom wall 2a. The stud 32 is an example of the first support column. The first support column is not limited to the stud 32 formed of a member different from the housing 2, and may be a boss or the like formed integrally with the housing 2.

  The stud 32 has a head portion 32a and a shaft portion 32b. The head 32a is connected to the end of the shaft 32b in the direction opposite to the Z direction. The head portion 32a is press-fitted into the bottom wall 2a by caulking or the like. The stud 32 is not limited to this example, and the head 32a may be pressed into the intermediate wall 31a side.

  The shaft portion 32b extends in the Z direction from the head portion 32a. A female screw portion that meshes with the male screw portion of the coupler 36 is provided in the cylinder of the shaft portion 32b. The coupler 36 is a screw, a bolt, or the like, and is coupled to the female screw portion of the shaft portion 32b in a state of penetrating the intermediate wall 31a in the Z direction. The intermediate wall 31a is supported by a plurality of studs 32 in parallel with the bottom wall 2a while being separated from the bottom wall 2a in the Z direction.

  The stud 33 is interposed between the intermediate wall 31a and the substrate 5 and extends in the Z direction. In this embodiment, a plurality of studs 33 are provided at intervals in the Y direction and the X direction of the intermediate wall 31a. Further, the plurality of studs 33 are positioned so as to be displaced from the stud 32 when viewed in the Z direction. The stud 33 is an example of the second support column.

  The stud 33 has a head portion 33a and a shaft portion 33b, like the stud 32. The head portion 33a is connected to the end portion of the shaft portion 33b in the direction opposite to the Z direction. The head 33a is press fitted into the intermediate wall 31a by caulking or the like.

  The shaft portion 33b extends in the Z direction from the head portion 33a. A female screw portion that meshes with the male screw portion of the coupler 37 is provided in the cylinder of the shaft portion 33b. The coupler 37 is a screw, a bolt, or the like, and is coupled to the female screw portion of the shaft portion 33b in a state of penetrating the substrate 5 in the Z direction. The substrate 5 is supported by the plurality of studs 33 in parallel with the intermediate wall 31a while being separated from the intermediate wall 31a in the Z direction.

  Then, in the present embodiment, a plurality of electronic components 15 are mounted on the lower surface 5b of the substrate 5 opposite to the upper surface 5a. The electronic component 15 is cooled by cooling air (air flow) from the fan unit 4 described later. The electronic component 15 is an example of a third heating element. The third heating element may be the lower end portions of the expansion slots 5c and 5d provided so as to penetrate the substrate 5 in the Z direction.

  Next, the fan unit 4 will be described in more detail. FIG. 3 is a plan view of the fan unit 4. As shown in FIG. 3, the fan unit 4 has two fans 41 and 42 arranged in the Y direction. The fan 42 is located in the direction opposite to the Y direction of the fan 41, that is, on the side opposite to the left wall 2d. The fan 41 is an example of a first fan, and the fan 42 is an example of a second fan.

  The fan 41 has a plurality of blades 41a and a hub 41b. The hub 41b is formed in a cylindrical shape centering on a rotation center Ax1 (rotation axis) extending in the X direction. The plurality of blades 41a protrude outward from the hub 41b in the radial direction of the rotation center Ax1 and are arranged in the circumferential direction around the rotation center Ax1.

  Further, the plurality of blades 41a are located in an annular opening 41c provided between the hub 41b and the casing of the fan unit 4. The fan 41 is an intake fan that introduces air into the housing 2 through the annular opening 41c by rotation of the blade 41a around the rotation center Ax1. The fan 41 is not limited to this example, and may be an exhaust fan that discharges air to the outside of the housing 2 through the annular opening 41c by rotating the blade 41a around the rotation center Ax1.

  Then, in the present embodiment, when the electronic component 15 described above is viewed in the X direction (the line of sight of FIG. 3), the bottom wall of the annular opening 41c is lower than the lower end portion 41b1 of the hub 41b in the direction opposite to the Z direction. It is arranged so as to overlap the opening region 41c1 close to 2a. As a result, the cooling performance of the electronic component 15 is enhanced by the cooling air (air flow) from the opening region 41c1. The lower end portion 41b1 is an example of a third end portion, and the opening area 41c1 is an example of a first opening area.

  Further, in the present embodiment, the PCH 13 and the heat sink 11 are overlapped with the opening region 41c2 of the annular opening 41c, which is farther from the rotation center Ax1 than the left end portion 41b2 of the hub 41b in the Y direction when viewed in the X direction. It is arranged. Further, in this embodiment, the controller 9b and the heat sink 9c of the RAID module 9 are also arranged so as to overlap the opening region 41c2 when viewed in the X direction.

  As a result, the cooling properties of the PCH 13 and the heat sink 11, and the controllers 9b and 9c are improved as compared with the case where the heat sinks 11 and 9c and the like are arranged so as to overlap the hub 41b in the X direction. The left end portion 41b2 is an example of a fourth end portion, and the opening area 41c2 is an example of a second opening area. Moreover, the PCH 13 and the heat sink 11, and the controller 9b and the heat sink 9c are examples of the first heating element.

  Like the fan 41, the fan 42 has a plurality of blades 42a and a hub 42b. The hub 42b is formed in a cylindrical shape centering on a rotation center Ax2 (rotation axis) extending in the X direction. The plurality of blades 42a protrude outward from the hub 42b in the radial direction of the rotation center Ax2 and are arranged in the circumferential direction around the rotation center Ax2.

  Further, the plurality of blades 42a are positioned in an annular opening 42c provided between the hub 42b and the casing of the fan unit 4. The fan 42 is an intake fan that introduces air into the housing 2 through the annular opening 42c by rotating the blade 42a around the rotation center Ax2. The fan 42 is not limited to this example, and may be an exhaust fan that discharges air to the outside of the housing 2 through the annular opening 42c by rotating the blade 42a around the rotation center Ax2.

  The fan 42 is aligned with the CPU 14 and the heat sink 12 in the X direction. In the present embodiment, the cooling air (air flow) from the fan 42 flows in the X direction in the duct member 10 described later, passes (passes) through the CPU 14 and the heat sink 12, and then the exhaust port 2k of the rear wall 2e described above. Discharged from. As a result, the cooling properties of the CPU 14 and the heat sink 12 are improved. The CPU 14 and the heat sink 12 are an example of a second heating element.

  Next, the duct member 10 will be described in more detail. FIG. 4 is a partial XZ sectional view of the duct member 10. As shown in FIG. 4, the duct member 10 has a bottom wall 10a, a top wall 10b, a pair of side walls 10c, two inclined walls 10d and 10f, and the like.

  Each of the bottom wall 10a and the top wall 10b extends along a direction (XY plane) orthogonal to the Z direction, and is provided in parallel with each other at intervals in the Z direction. The top wall 10b is provided between the upper end portion of the fan 42 in the Z direction and the rear wall 2e, and covers the heat sink 12 in the Z direction. The bottom wall 10a is provided between the lower end of the fan 42 in the opposite direction to the Z direction and the front end 31a4 of the reinforcing plate 31. In other words, the length of the bottom wall 10a in the X direction is shorter than the length of the top wall 10b in the X direction. The bottom wall 10a faces the bottom wall 2a inside the housing 2 with a gap in the Z direction.

  Each of the pair of side walls 10c extends along a direction (XZ plane) orthogonal to the Y direction, and is provided in parallel with each other with an interval in the Y direction. One of the side walls 10c is provided between the left end of the fan 42 in the Y direction and the rear wall 2e, and covers the heat sink 12 in the Y direction. The other of the side walls 10c is provided between the right end of the fan 42 in the direction opposite to the Y direction and the rear wall 2e, and covers the heat sink 12 in the direction opposite to the Y direction. The side wall 10c is provided with a cutout portion 10r for accommodating the reinforcing plate 31 and the substrate 5, respectively. The notch 10r is recessed in the Z direction from the lower end of the side wall 10c in the direction opposite to the Z direction. The cutout portion 10r is also referred to as an escape hole, a recess, or the like.

  The inclined wall 10d is provided between the bottom wall 10a and the front end portion 5f of the substrate 5 in the opposite direction to the X direction. The sloping wall 10d is inclined so as to move away from the bottom walls 2a and 10a as it moves away from the fan 42 in the X direction, and to approach the front end portion 5f. The slanted wall 10d is provided between the pair of side walls 10c and extends in the Y direction. The slanted wall 10d guides the cooling air (air flow) from the fan 42 that flows in the duct member 10 in the direction opposite to the Z direction to the substrate 5 toward the substrate 5. The slanted wall 10d is an example of an inclined portion. The front end portion 5f is an example of an edge of the substrate 5 that faces the fan 42 with a gap in the X direction and extends in the Y direction.

  A gap P1 is provided between the inclined wall 10d and the standing wall 31b provided at the front end 31a4 of the reinforcing plate 31. The gap P1 extends in the Y direction along the inclined wall 10d. A wiring holding portion 38 is provided in the gap P1. The wire holding portion 38 has a substantially O-shaped XZ cross section, and holds a cable or the like (not shown) that electrically connects the auxiliary storage device 6 and the RAID module 9 described above in a posture along the Y direction. be able to. The wiring holding portion 38 is supported by the standing wall 31b via a connecting portion 39. The gap P1 is an example of a wiring path.

  The slanted wall 10f is provided on the inner surface of the ceiling wall 10b and is offset from the slanted wall 10d in the X direction. The sloping wall 10f is inclined so as to move away from the ceiling wall 10b and approach the substrate 5 as it moves away from the fan 42 in the X direction. The slanted wall 10f is provided between the pair of side walls 10c and extends in the Y direction. The inclined wall 10f guides the cooling air (air flow) from the fan 42 that flows in the Z direction in the duct member 10 in the Z direction toward the substrate 5. This suppresses the cooling air from passing through the gap between the top wall 10b and the heat sink 12 and being discharged without performing heat exchange with the heat sink 12.

  As described above, in the present embodiment, the reinforcing structure 3 includes the left end portion 31a1 (first side wall) provided between the bottom wall 2a and the substrate 5 in parallel with the bottom wall 2a and coupled to the left wall 2d (first side wall). An intermediate wall 31a having one end), and a bottom wall 2a protruding from the right end 31a3 (second end) opposite to the left end 31a1 of the intermediate wall 31a in the Z direction (first direction). Between the standing wall 31b joined together, a plurality of studs 32 (first support columns) interposed between the bottom wall 2a and the intermediate wall 31a and extending in the Z direction (first direction), and between the intermediate wall 31a and the substrate 5. And a plurality of studs 33 (second support columns) interposed in the Z direction and extending in the Z direction.

  With such a configuration, when the left wall 2d and the right wall 2f of the housing 2 are gripped and lifted when the electronic device 1 is installed or maintained, etc., the bottom wall 2a and the intermediate wall due to their own weight. 31a can be suppressed from bending in the opposite direction to the Z direction, or the intermediate wall 31a can be suppressed from bending in the opposite direction to the Z direction than the stud 32. Therefore, the bending of the substrate 5 supported by the intermediate wall 31a via the stud 33 is more easily suppressed. Further, since the bending of the substrate 5 can be suppressed more reliably, there is an advantage that more electronic components 15 can be mounted in the space around the stud 33 on the lower surface 5b of the substrate 5.

  Further, in the present embodiment, the electronic component 15 (second heating element) has the lower end portion 41b1 of the hub 41b of the annular opening 41c of the fan 41 (first fan) when viewed in the X direction (second direction). It is arranged so as to overlap the opening region 41c1 (first opening region) closer to the bottom wall 2a than the (third end), and the PCH 13 and the heat sink 11 (first heating element) are annular when viewed in the X direction. The opening 41c is arranged so as to overlap the left end portion 41b2 (fourth end portion) of the hub 41b and an opening region 41c2 (second opening region) farther from the rotation center Ax1.

  With such a configuration, it is possible to more effectively suppress the temperature rise of the electronic component 15 mounted on the lower surface 5b of the substrate 5 by utilizing the opening region 41c1 of the annular opening 41c of the fan 41. By utilizing the opening region 41c2, it is possible to more effectively suppress the temperature rise of the PCH 13 and the heat sink 11 mounted on the upper surface 5a of the substrate 5.

  In addition, in the present embodiment, the electronic device 1 is located in a direction opposite to the Y direction (third direction) of the fan 41 (first fan) and introduces air into the housing 2 (second fan). ), the CPU 14 and the heat sink 12 (third heating element) mounted on the upper surface 5a (first surface) of the substrate 5 and aligned with the fan 42 in the X direction (second direction), the fan 42 and the rear wall 2e (first). The duct member 10 is provided over the exhaust port 2k (opening) provided on the three side walls) and covers the CPU 14 and the heat sink 12 from the side opposite to the bottom wall 2a of the substrate 5.

  With such a configuration, the temperature rises of the CPU 14 and the heat sink 12 can be more reliably suppressed as compared with the configuration in which the duct member 10 is not provided. Further, since the duct member 10 extending between the fan 42 and the rear wall 2e functions as a beam, the bottom wall 2a and the intermediate wall 31a are bent in the opposite direction to the Z direction, and thus the substrate 5 supported by the intermediate wall 31a. It is possible to more reliably suppress the bending of the.

  In addition, in the present embodiment, the duct member 10 is located between the front end portion 5f (end side) of the substrate 5 and the fan 42, and as it moves away from the fan 42, the duct member 10 moves away from the bottom wall 2a and approaches the front end portion 5f. A gap P1 (wiring passage) extending in the Y direction is provided between the inclined wall 10d and the standing wall 31b (first standing wall) provided at the front end 31a4 of the reinforcing plate 31. Has been.

  According to such a configuration, the cooling air (air flow) from the fan 42 that flows in the duct member 10 in the direction opposite to the Z direction in the duct member 10 can be guided toward the substrate 5 by the inclined wall 10d. It is possible to more effectively suppress the temperature rise of the CPU 14 and the heat sink 12 mounted on the CPU 5. Moreover, the cable provided in the housing 2 can be routed by effectively utilizing the gap P1 between the inclined wall 10d and the standing wall 31b.

[Modification]
FIG. 5 is a cross-sectional view of a modified electronic device 1A. The electronic device 1A has the same configuration as the electronic device 1 of the above embodiment. Therefore, the electronic device 1A can obtain the same operation and effect as the above-described embodiment based on the same configuration.

  However, in this modified example, as shown in FIG. 5, the stud 33A of the reinforcing structure 3A is interposed between the bottom wall 2a and the substrate 5 while penetrating the intermediate wall 31a in the Z direction. This is different from the above embodiment. The stud 33A is an example of a second support column. The second support column is not limited to the stud 33A formed as a separate member from the housing 2A, and may be a boss or the like formed integrally with the housing 2A.

  The stud 33A is interposed between the bottom wall 2a and the substrate 5 and extends in the Z direction. In this modification, a plurality of studs 33A are provided at intervals in the Y direction and the X direction of the bottom wall 2a. Further, the plurality of studs 33A are positioned so as to be displaced from the stud 32A when viewed in the Z direction. The head 33a of the stud 33A is press fitted into the bottom wall 2a by caulking or the like. The stud 33A is not limited to this example, and the head 33a may be pressed into the substrate 5 side.

  The shaft portion 33b extends in the Z direction from the head portion 33a. A female screw portion that meshes with the male screw portion of the coupler 37 is provided in the cylinder of the shaft portion 33b. The coupler 37 is a screw, a bolt, or the like, and is coupled to the female screw portion of the shaft portion 33b in a state of penetrating the substrate 5 in the Z direction. The substrate 5 is supported by the plurality of studs 33A in a state of being separated from the intermediate wall 31a in the Z direction in parallel with the bottom wall 2a and the intermediate wall 31a.

  Further, the gap between the intermediate wall 31a and the substrate 5 is set to be smaller than the gap between the intermediate wall 31a and the substrate 5 of the above embodiment, that is, the height of the stud 33 (see FIG. 2) in the Z direction. There is. As a result, the reinforcement structure 3A and thus the housing 2A can be made smaller (thinner) in the Z direction. In this modification, the gap between the intermediate wall 31a and the substrate 5 is set smaller than the height in the Z direction of the stud 32A interposed between the bottom wall 2a and the intermediate wall 31a.

  Thus, according to this modification, the stud 33A is provided so as to be interposed between the bottom wall 2a and the substrate 5, so that the substrate 5 and the intermediate wall 31a can be arranged closer to each other. it can. Therefore, there is an advantage that the reinforcing structure 3A and thus the housing 2A can be made smaller in the Z direction. Also, according to this modification, when the left wall 2d and the right wall 2f of the housing 2A are gripped and lifted at the time of installing the electronic device 1A or performing maintenance, the bottom wall 2a and the intermediate wall are caused by their own weight. 31a can be suppressed from bending in the direction opposite to the Z direction. Therefore, the flexure of the substrate 5 supported by the bottom wall 2a via the stud 33A can be more reliably suppressed.

  Although the embodiment and the modified example of the present invention have been described above, the above-described embodiment and the modified example are merely examples, and are not intended to limit the scope of the invention. The above-described embodiments and modified examples can be implemented in various other forms, and various omissions, replacements, combinations, and changes can be made without departing from the spirit of the invention. In addition, specifications such as each configuration and shape (structure, type, direction, form, size, length, width, thickness, height, number, arrangement, position, material, etc.) may be changed as appropriate. Can be implemented.

  1, 1A... Electronic device, 2... Housing, 2a... Bottom wall, 2c... Front wall (second side wall), 2d... Left wall (first side wall), 2e... Rear wall (third side wall, first side wall) 2k... Exhaust port (opening), 3, 3A... Reinforcement structure, 5... Substrate, 5a... Upper surface (first surface), 5b... Lower surface (second surface), 5f... Front end (short side), 10... Duct Members: 10d... Inclined wall (inclined portion), 11... Heat sink (first heating element), 12... Heat sink (third heating element), 13... PCH (first heating element), 14... CPU (third heating element) , 15... Electronic component (second heating element), 31a... Intermediate wall, 31b... Standing wall (first standing wall), 32, 32A... Stud (first support), 33, 33A... Stud (second support), 41... Fan (first fan), 41a... Blade, 41b... Hub, 41b1... Lower end (third end), 41b2... Left end (fourth end), 41c... Annular opening, 41c1... Opening area (first opening) Area), 41c2... Opening area (second opening area), 42... Fan (second fan), Ax1... Rotation center, P1... Gap (wiring passage), X... Second direction, Y... Third direction, Z... First direction.

Claims (5)

A casing having a bottom wall and a first side wall extending from the bottom wall in a first direction intersecting the bottom wall,
A substrate housed in the housing and provided in parallel with the bottom wall at a distance in the first direction,
An intermediate wall provided between the bottom wall and the substrate in parallel with the bottom wall and having a first end coupled to the first side wall, and a side opposite to the first end of the intermediate wall. A plurality of first struts extending in the first direction between the upright wall projecting from the second end portion of the second end in the direction opposite to the first direction and coupled to the bottom wall, and the standing wall interposed between the bottom wall and the intermediate wall. And a reinforcing structure having a plurality of second columns extending between the intermediate wall and the substrate and extending in the first direction,
An electronic device equipped with. A casing having a bottom wall and a first side wall extending from the bottom wall in a first direction intersecting the bottom wall,
A substrate housed in the housing and provided in parallel with the bottom wall at a distance in the first direction,
An intermediate wall provided between the bottom wall and the substrate in parallel with the bottom wall and having a first end coupled to the first side wall, and a side opposite to the first end of the intermediate wall. A plurality of first struts extending in the first direction between the upright wall projecting from the second end portion of the second end in the direction opposite to the first direction and coupled to the bottom wall, and the standing wall interposed between the bottom wall and the intermediate wall. A reinforcing structure having a plurality of second support columns extending in the first direction and interposed between the bottom wall and the substrate while penetrating the intermediate wall,
An electronic device equipped with. The housing has a second side wall different from the first side wall extending in the first direction from the bottom wall,
The substrate has a first surface in the first direction on which a first heating element is mounted, and a second surface on the side opposite to the first surface on which a second heating element is mounted,
A hub attached to the second side wall, and a plurality of blades that rotate around the hub around a rotation center extending in the second direction when viewed in a second direction intersecting the second side wall. Then, a first fan for introducing air into the housing through the annular opening around the hub by the rotation of the blade or for discharging air to the outside of the housing,
The second heating element, when viewed in the second direction, a first opening region closer to the bottom wall than a third end of the annular opening in the direction opposite to the first direction of the hub. Arranged so that they overlap
The first heating element has, when viewed in the second direction, the rotation center rather than a fourth end portion of the annular opening in a third direction intersecting the first direction and the second direction of the hub. The electronic device according to claim 1, wherein the electronic device is arranged so as to overlap with a second opening region that is away from. The housing has a third side wall extending in the first direction from the bottom wall and provided in parallel with the second side wall at a distance in the second direction,
It is attached to the second side wall and is located in the third direction of the first fan or in a direction opposite to the third direction of the first fan, and introduces air into the housing or air outside the housing. A second fan to exhaust,
A third heating element mounted on the first surface and aligned with the second fan in the second direction,
A duct member provided between the second fan and an opening provided in the third side wall, and covering the third heating element from the side opposite to the bottom wall of the substrate;
The electronic device according to claim 3, further comprising: The duct member is located between the second fan and an edge of the substrate that faces the second fan with a gap in the second direction and extends in the third direction. Having an inclined portion that approaches the edge while moving away from the bottom wall,
The reinforcing structure has a first standing wall facing the second side wall as the standing wall,
The electronic device according to claim 4, wherein a wiring passage extending in the third direction is provided between the inclined portion and the first standing wall.