JP5733144B2 - Electronics - Google Patents

Description

  The technology disclosed in the present application relates to an electronic apparatus.

  For example, many electronic devices having an information processing function represented by a notebook personal computer (hereinafter abbreviated as “notebook PC”) have electronic components such as a CPU that generates heat by executing processing. Yes. Electronic components may malfunction if the temperature rises too much. For this reason, the electronic device is provided with a blower (fan or blower) inside the housing in order to cool the electronic components.

  The blower includes, for example, an axial fan and a centrifugal fan. To reduce the thickness of the notebook PC, the blower tends to use a centrifugal fan rather than an axial fan.

  Conventionally, the centrifugal fan is attached to the lower surface side of the substrate disposed along the upper wall of the notebook PC housing, and the air inlets provided on both sides in the axial direction of the fan are parallel to the substrate.

JP 2010-250515 A

  By the way, in a notebook PC, when placed on a desk, the top wall is inclined so that the front wall side of the casing is lowered with respect to the user. In other words, the storage height of the casing is Some are lowered from the back wall toward the front wall of the housing.

  However, if the suction port of the centrifugal fan is parallel to the substrate along the upper wall of the casing, the centrifugal fan and the lower wall of the casing are closer to the front wall of the casing than to the rear wall of the centrifugal fan. Is close. As a result, there is a tendency that the airflow resistance of the air flowing in from the front wall side of the intake port facing the lower wall of the centrifugal fan is increased. If the airflow resistance of the air flowing in from the front wall side of the intake port increases, the amount of hot air that tends to be trapped on the lower surface side of the board on which the electronic components are mounted and the front wall side of the board is reduced. There is a risk that the cooling efficiency on the lower surface side of the substrate and the front wall side of the housing due to intake air will deteriorate. Hereinafter, the lower surface side of the substrate and the front wall side of the housing are referred to as “lower surface front wall side” or “lower surface other end side”.

  The disclosed technology of the present application reduces the ventilation resistance of the air flowing into the air inlet of the centrifugal blower from the other end side of the lower surface of the substrate housed in the housing whose housing height is lowered from one end to the other end. It is an object to provide an electronic device that can be used.

  In order to solve the above problems, an electronic device disclosed in the present application has a housing whose storage height decreases from one end to the other end. Further, the electronic device is housed in the housing along the upper wall of the housing, the electronic component is mounted on the lower surface facing the lower wall of the housing, and an opening penetrating in the thickness direction is formed. Having a substrate. Furthermore, the electronic device includes a centrifugal fan disposed in the opening, including a rotating blade whose axial direction is the plate thickness direction, and intake ports provided on both sides of the rotating blade in the axial direction. In this centrifugal blower, the distance between the edge on the other end side of the casing and the upper wall at each intake port is shorter than the distance between the edge on the one end side of the casing and the upper wall at each intake port. It will be lost.

  According to the electronic device disclosed in the present application, the edge on the other end portion side of the housing at each air inlet facing the lower wall as compared with the case where the air inlet of the centrifugal blower is parallel to the substrate And the space between the housing and the lower wall of the housing. Thereby, it is possible to reduce the ventilation resistance of the air flowing into the intake port of the centrifugal blower from the other end side of the lower surface of the substrate housed in the housing that is lowered in the housing height from one end portion toward the other end portion. it can.

It is a perspective view showing the front and right side wall of the notebook PC which concern on embodiment which has a display unit in the state opened with respect to the main body unit. It is a perspective view showing the back wall and right side wall of the notebook PC in a state where the display unit is open with respect to the main unit. It is a lower wall figure of notebook PC in the state where the display unit opened with respect to the main unit. It is a left side view of the notebook PC in a state where the display unit is closed with respect to the main unit (closed state). It is a disassembled perspective view of a main body unit. FIG. 6 is a layout view of various electronic components as seen from the lower cover side to the upper cover side. It is the figure which expanded especially the centrifugal fan vicinity of the cooling unit shown in FIG. 6, (A) has shown the state before attachment of a centrifugal fan, and has shown the state after attachment of a centrifugal fan. It is AA arrow sectional drawing of the notebook PC shown in FIG. It is a disassembled perspective view of the main body unit which showed the state in the middle of attaching a centrifugal fan to each mounting base. FIG. 9 is an enlarged schematic view around a centrifugal fan in the notebook PC shown in FIG. 8. It is the figure which looked at the centrifugal fan shown in FIG. 7 from the reverse side. It is a figure which shows the modification of the centrifugal fan shown in FIG.

  Hereinafter, embodiments of an electronic apparatus disclosed in the present application will be described in detail with reference to the drawings. In the drawings, members (components) having the same or corresponding functions are denoted by the same reference numerals and description thereof is omitted as appropriate.

  The electronic device according to the present embodiment is a so-called notebook PC, and has a structure in which a main unit and a display unit are connected to be freely opened and closed. The main unit is equipped with a keyboard or the like and executes various information processing. The display unit executes display of images and the like.

  As illustrated in FIG. 1, the notebook PC 10 includes the display unit 12 and the main body unit 14 having a rectangular shape when viewed from the top as described above. Further, the notebook PC 10 has a rotating shaft 16 disposed along the width direction D2 at one end portion in the depth direction D1 of the main unit 14. The display unit 12 and the main unit 14 are connected to the main unit 14 so that the display unit 12 can be rotated (opened / closed) in the direction of the arrow D3 around the rotation shaft 16.

  The display unit 12 is for displaying the information processing result executed by the main unit 14. On the front surface of the display unit 12 in the open state, a display screen 18 that is a display panel for displaying an image in accordance with an instruction from the main unit 14 extends. The periphery of the display screen 18 is covered with a front cover 20 </ b> A that forms the housing 20 of the display unit 12.

  The housing 20 of the display unit 12 includes a front cover 20A and a back cover 20B that covers the back wall side of the display screen 18. The display screen 18 and the control circuit for the display screen 18 are housed in the housing 20 between the front cover 20A and the back cover 20B.

  The main unit 14 is for executing information processing in accordance with a user operation or the like. In order to execute the information processing, in the main body casing 24 of the main body unit 14, as will be described later, there are a large number of circuit boards on which a CPU and the like are mounted and a hard disk drive unit (HDD unit) for storing information. The parts are stored.

  A power button 26 and various function buttons 28 are provided at the end of the upper wall 24 </ b> A of the main body housing 24 in the depth direction D <b> 1.

  A keyboard 30 on which a plurality of keys are arranged to input various information and instructions to the notebook PC 10 is disposed in the center of the upper wall 24A of the main body casing 24.

  A track pad 32 is provided on the front side of the keyboard 30. On the front side of the track pad 32, left and right operation buttons 33 for the track pad 32 are provided. In addition, a power supply inlet 34 into which a connector of an AC adapter (not shown) that converts AC power into DC power and supplies it to the notebook PC 10 is formed in the right side wall 24B of the main body casing 24.

  In FIG. 2, the battery housing opening 38 for housing the battery 36 is formed in the body housing 24 of the body unit 14 from the back wall 24 </ b> C to the lower wall 24 </ b> D of the body housing 24.

  As will be described later, the notebook PC 10 of the present embodiment uses a cooling unit that cools various electronic components inside the main body housing 24 using air, and the back of the back wall 24C of the main body housing 24 is used. Is provided with an exhaust port 40 for the cooling unit having a slit shape.

  In FIG. 3, the lower wall 24D of the main body housing 24 is provided with a slit-shaped cooling unit air inlet 42. Cooling air is taken into the main body housing 24 from the air inlet 42. The heat generated in the various electronic components is absorbed by the cooling air by the cooling unit, thereby cooling the various electronic components. The air warmed by absorbing heat is exhausted from the exhaust port 40 in the back wall 24 </ b> C of the main body casing 24 to the outside of the main body casing 24.

  An opening 44 extending along the exhaust port 40 is formed in the lower wall 24D of the main body casing 24. A lid 46 covering the opening 44 is detachably attached to the opening 44. Since the lid 46 is detachably attached in this way, the lid 46 is removed from the opening 44 when dust accumulates in the cooling unit, particularly the fins of the heat radiating section described later, and a cotton swab is placed in the exposed opening 44. Etc. can be inserted to clean the cooling unit.

  Further, a memory opening 48 in which a connector into which a memory board is inserted is disposed is formed in the lower wall 24D of the main body casing 24 on the front side of the main body casing 24 with respect to the battery housing opening 38. A lid 50 that closes the memory opening 48 is attached to the memory opening 48. Further, adjacent to the memory opening 48 is formed an HDD unit accommodation opening 52 in which an HDD unit described later is accommodated. A lid 56 covering the HDD unit accommodation opening 52 is detachably attached to the HDD unit accommodation opening 52.

  In addition, four legs 58 extending downward from the lower wall 24D are provided at the four corners of the lower wall 24D of the main body casing 24.

  In FIG. 4, various insertion ports such as a USB (Universal Serial Bus) port 60 are formed in the left side wall 24 </ b> E of the main body casing 24 of the main body unit 14.

  The main body casing 24 is installed on the installation surface 62 with the top portions 58 </ b> A of the four leg portions 58 in contact with the installation surface 62. The installation surface 62 coincides with a virtual plane in contact with the top portions 58A of the four leg portions 58. Even when the actual installation surface 62 is an uneven surface or a curved surface, the “installation surface” in the present embodiment is assumed to coincide with the virtual plane.

  In the present embodiment, the main body casing 24 is made thinner from the back wall 24C toward the front wall 24F (from the left side to the right side in FIG. 4). In other words, the housing height of the main body casing 24 is lowered as it goes from the back wall 24C to the front wall 24F. With such thinning, the upper wall 24A of the main body casing 24 is inclined with respect to the installation surface 62 so that the back wall side D4 is lower than the installation surface 62 compared to the front wall side D5. doing. The “back wall side D4 of the main body housing 24” means that it is on the back side with respect to the user when the notebook PC 10 is used. Further, “the front wall side D5 of the main body casing 24” means that it is on the near side with respect to the user when the notebook PC 10 is used.

  Further, the lower wall 24 </ b> D of the main body housing 24 includes a first lower wall portion 24 </ b> G that is inclined with respect to the installation surface 62, and a second lower wall portion 24 </ b> H along the installation surface 62.

  In FIG. 5, the main body housing 24 includes a lower cover 100 and an upper cover 102. The lower cover 100 includes a lower wall 24D of the main body casing 24, and a right side wall 24B, a back wall 24C, a left side wall 24E, and a front wall 24F that surround the lower wall 24D. The upper cover 102 includes an upper wall 24 </ b> A of the main body casing 24.

  Between the lower cover 100 and the upper cover 102, that is, inside the main body casing 24, the mother board 104 and the main frame 106 are accommodated in order from the lower cover 100 side along the upper wall 24 </ b> A of the main body casing 24. Yes.

  Next to the motherboard 104, a CD / DVD drive unit 110 and an HDD unit 112 are arranged side by side.

  Various input signals generated in these components by a user operation on the keyboard 30, the track pad 32, and the left and right operation buttons 33 for the track pad 32 are sent to the motherboard 104.

Further, the motherboard 104 is provided with an opening 104B having an outer shape in which an end portion 105 on the back wall side D4 of the main body casing 24 of the motherboard 104 is cut toward the front wall side D5. The opening 104B penetrates in the thickness direction of the mother board 104 and extends in the depth direction D1 of the main body unit 14, and is sized so that a part of the heat radiating portion 128 described later and the centrifugal fan 140 can enter. Yes.
A vent 106A that penetrates in the thickness direction of the main frame 106 and extends in the depth direction D1 of the main body unit 14 is formed at a location of the main frame 106 that faces the opening 104B. The vent 106A has a length in the depth direction D1 of the main unit 14 smaller than that of the opening 104B, and faces at least an air inlet 148B of the centrifugal fan 140 described later.

  In FIG. 6, various electronic components are mounted on the lower surface 104A of the mother board 104 facing the lower wall 24D. The various electronic components include a CPU 114 that controls the entire notebook PC 10, a chip set 116 that controls data communication and the like in the CPU 114, a memory board 118, and the like.

  Various electronic components mounted on the motherboard 104, in particular the CPU 114, are components that generate heat when signal processing is executed, and it is preferable that the notebook PC 10 is always cooled during operation to avoid malfunctions due to heat generation. Therefore, in the present embodiment, a cooling unit 120 described below is mounted on the lower surface 104A of the motherboard 104 for cooling the CPU 114.

  The cooling unit 120 has a heat transfer unit 122. The heat transfer unit 122 includes a copper heat absorbing plate 124 that contacts the CPU 114 and absorbs heat generated by the CPU 114, and a heat pipe 126 that transfers heat absorbed by the heat absorbing plate 124 to a heat radiating unit 128 described later. Yes. In the cooling unit 120 described above, the heat generated by the CPU 114 is collected by the heat dissipation unit 128 by the heat transfer unit 122.

  The heat dissipating part 128 is disposed along the mother board 104 and faces a blower port 150 of a centrifugal fan 140, which will be described later. A plurality of metal fins 130 are provided in a ventilating tube through which the air blown from the blower port 150 passes. They have a structure in which they are arranged at a predetermined interval. The heat transferred to the heat radiating part 128 by the heat transfer part 122 is transferred to the fins 130 of the heat radiating part 128.

  In addition, the cooling unit 120 includes a centrifugal fan 140 that blows air in the direction indicated by the arrow D6 so that air flows between the fins 130 of the heat radiating unit 128.

  The centrifugal fan 140 is disposed on the front wall side D5 of the main body casing 24 in the opening 104B, and has a casing 142 formed in a flat plate shape.

  7 and 8, the central portion 144 of the housing 142 is provided with a rotating shaft (not shown) that extends in the plate thickness direction of the housing 142 and intersects the opening 104B. A rotating blade 146 that rotates with the rotating shaft and generates air is attached to the outer periphery of the rotating shaft. And this rotary blade 146 makes the plate | board thickness direction of the motherboard 104 the axial direction. 7 and 8, the detailed shape of the rotary blade 146 is not shown.

  Circular air inlets 148A and 148B are provided at the ends of the casing 142 facing both sides in the axial direction of the rotary blade 146 (the air inlet 148B is not shown in FIG. 7). Of the intake ports 148A and 148B, the intake port 148A faces the lower wall 24D (particularly the second lower wall portion 24H) of the main body housing 24, and the intake port 148B faces the upper wall 24A of the main body housing 24. ing.

  Further, as shown in FIG. 8, the end portion 143 of the housing 142 on the back wall side D4 facing the radial direction of the rotary blade 146, that is, the end of the housing 142 located on the back wall side D4 of the main body housing 24. The part 143 is provided with an air outlet 150 that faces the heat radiating part 128. The air blowing port 150 indirectly cools the CPU 114 by blowing the air blown by the rotary blades 146 toward the back wall side D4 of the main body housing 24 and blowing it to the heat radiating unit 128.

Further, as shown in FIG. 7, the centrifugal fan 140 is attached to the main frame 106 at one corner 142 </ b> A of the casing 142 that is located in the longitudinal direction of the main unit 14 and faces the radial direction of the rotary blade 146. A flat plate-like mounting portion 142B is provided.
In addition, a flat plate-like attachment portion 142C for attaching the centrifugal fan 140 to the main frame 106 is also provided at an end portion of the housing 142 on a diagonal line connecting the attachment portion 142B and the rotation shaft.

  Each attachment portion 142B, 142C is formed with a screw hole 142D penetrating in the plate thickness direction.

  Further, between the opening 104B and the vent 106A of the main frame 106, as shown in FIGS. 5 and 7, mounting bases 106B and 106C for the centrifugal fan 140 are provided so as to face the mounting parts 142B and 142C. Has been placed.

Specifically, each of the mounting bases 106B and 106C extends from both edges of the vent hole 106A located in the width direction D2 of the main body unit 14 toward the inside of the opening 104B of the mother board 104 and faces the opening 104B. (See FIG. 5).
In this way, the mounting surfaces 106D and 106C facing the opening 104B are respectively provided with pedestal surfaces 106D, and the pedestal surfaces 106D are provided with screw holes 106E.

  Further, as shown in FIG. 9, each pedestal surface 106D has a distance between the end on the front wall side D5 on each pedestal surface 106D and the upper wall 24A so that the distance from the end on the back wall side D4 on each pedestal surface 106D It is shorter than the distance from the wall 24A and is arranged along the second lower wall portion 24H.

As shown in FIG. 7, the mounting bases 106B and 106C and the mounting portions 142B and 142C of the centrifugal fan 140 are overlapped with each other, and the mounting screws 142E are screw holes 142D from the second lower wall portion 24H side. To be screwed into the screw hole 106E.
Accordingly, the centrifugal fan 140 is attached to each of the mounting bases 106B and 106C so that the air blowing port 150 is located between the mother board 104 and the second lower wall portion 24H at a position facing the heat radiating portion 128.

  Next, a state when the centrifugal fan 140 is attached to each of the mounting bases 106B and 106C will be described.

  In FIG. 10, in this embodiment, as described above, the upper wall 24A of the main body casing 24 has the front wall side D5 so that the height from the installation surface 62 is lower than the back wall side D4. It is inclined with respect to the installation surface 62. In other words, the storage height of the main body casing 24 is lowered from the back wall side D4 toward the front wall side D5. Further, the mother board 104 and the main frame 106 are along the upper wall 24A.

Therefore, the centrifugal fan 140 attached to each of the mounting bases 106B and 106C has the following arrangement.
The centrifugal fan 140 has a distance between the edge 148C on the front wall side D5 of the main body casing 24 and the upper wall 24 at each of the intake ports 148A and 148B. The arrangement is shorter than the distance from the upper wall 24A. Further, the centrifugal fan 140, in particular, each air inlet 148A, 148B intersects the motherboard 104 and the air vent 104B by an angle θ = 2 degrees and is along the second lower wall portion 24H of the main body casing 24.

  In FIG. 10, the angle θ is made larger than 2 degrees so that the intersection can be easily grasped. In addition, the meaning of “along the second lower wall portion 24H” is not limited to the case of being parallel to the second lower wall portion 24H, but is within ± 0.5 degrees with respect to the second lower wall portion 24H. The case where it has is included. The same applies to the other terms “along”.

  By the way, in the centrifugal fan 140, the air blown from the air blowing port 150 blows through between the fins 130 of the heat radiating unit 128, and the heat transmitted from the CPU 114 to the fins 130 is radiated to the air blowing. The air blown up by the heat radiation is exhausted from the exhaust port 40 shown in FIGS.

  At this time, if a part of the air blown from the air blowing port 150 leaks to other than the heat radiating part 128 without flowing between the fins 130 of the heat radiating part 128, the cooling efficiency of the heat radiating part 128 may be lowered. This decrease in the cooling efficiency of the fins 130 may cause a decrease in the cooling efficiency of the CPU 114.

  Therefore, in the present embodiment, in order to suppress wind leakage to other than the heat radiating unit 128, a flow path member that forms a flow path of air blowing from the air blowing port 150 toward the heat radiating unit 128 is provided.

  As one of the flow path members, a sheet metal 200 shown in FIGS. 5 and 10 is provided above the blower opening 150 of the centrifugal fan 140. The sheet metal 200 extends stepwise from the edge 106F on the back wall side D4 of the vent 106A toward the upper corner 140A of the back wall side D4 of the centrifugal fan 140. The front end 202 of the sheet metal 200 is in contact with the entire upper corner portion 140A of the centrifugal fan 140.

  A base 204 shown in FIGS. 5, 10, and 11 is provided below the sheet metal 200 as one of the flow path members. The pedestal 204 is disposed on the lower wall 24D along the lateral width of the air blowing port 150, and extends toward the lower corner portion 140B of the back wall side D4 of the centrifugal fan 140. The pedestal surface 206 of the pedestal 204 is in contact with the entire lower corner portion 140B of the centrifugal fan 140.

  Further, on both sides of the pedestal 204, two plate-like projection plates 208 shown in FIGS. 5 and 11 are provided as one of the flow path members. These projecting plates 208 extend upward from the upper surface of the pedestal surface 206, and the heat dissipating part 128 that faces the side wall D4 of the main body housing 24 of the centrifugal fan 140 and the air outlet 150. Are arranged so as to sandwich the side end portions of both sides.

  Next, the operation and effect of the above-described notebook PC 10 will be described.

In the notebook PC 10 according to the present embodiment, as shown in FIG. 10, the storage height of the main body casing 24 is lowered from the back wall 24 </ b> C toward the front wall 24 </ b> F. The frame 106 is along the upper wall 24A of the main body casing.
Here, as a comparative example, a case is assumed in which the inlet of the centrifugal fan is parallel to the motherboard 104. In FIG. 10, a two-dot chain line 160 shows the outer shape of the centrifugal fan of the comparative example.

  In this case, the centrifugal fan and the second lower wall portion 24H of the main body housing 24 are closer to each other on the front wall side D5 than the back wall side D4 of the centrifugal fan. Thereby, there exists a tendency for the ventilation resistance of the air which flows in from the front wall side D5 of the inlet port of the centrifugal fan facing the 2nd lower wall part 24H to become large. And if the ventilation resistance of the air which flows in from the front wall side D5 of this inlet port becomes large, the quantity which inhales the hot air mass which tends to be confined to the lower surface front wall side of the motherboard 104 in which various electronic components are mounted will decrease. Therefore, there is a possibility that the cooling efficiency on the lower front wall side of the mother board 104 due to intake air is deteriorated.

  On the other hand, in the centrifugal fan 140 of this embodiment, the distance between the edge 148C on the front wall side D5 of each intake port 148A, 148B and the upper wall 24A is the edge on the back wall side D4 of each intake port 148A, 148B. It is shorter than the distance between the portion 148D and the upper wall 24A.

As a result, as compared with the centrifugal fan of the comparative example in which the intake port is parallel to the motherboard 104, the edge 148C on the front wall side D5 in the intake port 148A facing the second lower wall portion 24H and the first 2 The space between the lower wall portion 24H becomes wider. As a result, the air flowing into the air inlet 148A of the centrifugal fan 140 from the lower front wall side of the mother board 104 housed in the main body housing 24 whose housing height is lowered from the back wall side D4 toward the front wall side D5. The ventilation resistance of 170 can be reduced.
In addition, a space between the air inlet 148B and the upper wall 24A can be secured as compared with the case where the centrifugal fan of the comparative example is brought close to the upper wall 24A while being parallel to the motherboard 104.

  Furthermore, the centrifugal fan 140 has a blower port 150 that blows out the air blown by the rotary blade 146 toward the back wall side D4 of the main body housing 24. For this reason, compared with the case where the air blowing port 150 blows air toward the front wall side D5 of the main body casing 24, the hot air mass sucked from the lower front wall side of the motherboard 104 on which various electronic components are mounted Further, it is possible to prevent the air blower 150 from returning to the lower front wall side of the motherboard 104 again.

  Furthermore, since the intake ports 148A and 148B of the centrifugal fan 140 are along the second lower wall portion 24H of the main body housing 24, the intake port 148A of the centrifugal fan 140 facing the second lower wall portion 24H is The air can be evenly taken from each direction.

  The notebook PC 10 is a sheet metal that extends from above the centrifugal fan 140 toward the upper corner 140A of the back wall D4 of the centrifugal fan 140 and forms a flow path of air flow from the air outlet 150 toward the heat radiating portion 128. 200. For this reason, when the air inlets 148A and 148B of the centrifugal fan 140 are not parallel to the mother board 104, the air blown from the air blowing port 150 hits the second lower wall part 24H and the heat radiating part 128 and the front wall side of the centrifugal fan 140 Escape to D5 can be suppressed.

  Further, the notebook PC 10 extends from the second lower wall portion 24H toward the lower corner portion 140B of the back wall side D4 of the centrifugal fan 140, and forms a pedestal 204 that forms a flow path of air flow from the air outlet 150 toward the heat radiating portion 128. have. For this reason, when the air inlets 148 </ b> A and 148 </ b> B of the centrifugal fan 140 are not parallel to the mother board 104, it is possible to prevent the air from the air outlet 150 from hitting the heat radiating portion 128 and escaping to the front wall side D <b> 5 of the centrifugal fan 140. .

  As mentioned above, although one Example of the technique which this application discloses was described, the technique which this application discloses is not limited above.

For example, although the case where the second lower wall portion 24H facing the centrifugal fan 140 is along the installation surface 62 has been described, as the storage height of the main body casing 24 moves from the back wall side D4 toward the front wall side D5. If it is lowered, the second lower wall portion 24 </ b> H may be inclined with respect to the installation surface 62.
Similarly, although the case where the upper wall 24 </ b> A of the main body casing 24 is inclined with respect to the installation surface 62 has been described, it may be along the installation surface 62.

  Further, although the centrifugal fan 140 has been described as having a flat-plate-shaped housing 142, the housing 142 is located in front of the back wall D4 of the main body housing 24 as shown in FIG. The thickness may be reduced toward the wall side D5. In this case, the distance between the edge 148C on the front wall side D5 and the upper wall 24A in the air inlet 148A is shorter than that in the above embodiment. Thereby, the space between 148A of inlet ports and the 2nd lower wall part 24H can be expanded more.

  Moreover, although the centrifugal fan 140 was illustrated as an example of a centrifugal blower, a centrifugal blower may be sufficient.

  Moreover, although the case where the storage height of the main body housing 24 is lowered as it goes from the back wall side D4 to the front wall side D5 has been described, the direction in which the housing height is lowered is not particularly limited. The storage height may be lowered as it goes from the front wall side D5 to the back wall side D4.

  Moreover, although the ventilation port 150 demonstrated the case where the ventilation by the rotary blade 146 was ejected toward the back wall side D4 of the main body housing | casing 24, the ventilation by the rotary blade 146 was directed to the front wall side D5 of the main body housing 24 May be ejected.

  Moreover, although the case where the ventilation port 150 is provided so as to face the heat radiating unit 128 has been described, the heat radiating unit 128 may be omitted and may be provided so as to face various electronic components such as the CPU 116.

  The electronic device is a so-called notebook PC 10, but is not limited to this. For example, it may be a so-called integrated personal computer or a so-called tablet personal computer in which a display or a keyboard is integrated. Furthermore, the present invention may be applied to electronic devices other than personal computers.

  Furthermore, it goes without saying that the technology disclosed in the present application can be implemented with various modifications within a range not departing from the gist thereof.

10 Notebook PC (electronic equipment)
24 Main unit housing (housing)
24A Upper wall 24C Back wall (one end)
24F front wall (other end)
24H Second lower wall (lower wall, one lower wall)
62 Installation surface 104 Motherboard (board)
104A Lower surface 104B Opening 106B, 106C Mounting base (mounting part)
114 CPU (electronic component)
128 Heat radiation part 140 Centrifugal fan (centrifugal blower)
140B Lower corner portion 140A Upper corner portion 146 Rotor blades 148A, 148B Inlet 150 Air outlet 200 Sheet metal (channel member, first channel member)
204 pedestal (second flow path member)

Claims (6)

A housing whose storage height decreases from one end to the other end;
A substrate that is housed in the housing along the upper wall of the housing, has an electronic component mounted on a lower surface facing the lower wall of the housing, and has an opening that penetrates in the thickness direction;
A rotary vane having the plate thickness direction as an axial direction, and intake ports provided on both sides in the axial direction of the rotary vane, and disposed in the opening, on the other end side of the casing at each intake port A centrifugal blower in which the distance between the edge and the upper wall is shorter than the distance between the edge on the one end side of the housing and the upper wall at each intake port,
Electronic equipment having The centrifugal blower has a blower opening that blows air blown by the rotating blades toward one end of the housing.
The electronic device according to claim 1. When the casing is installed on the installation surface, the other end is the front side of the user who uses the electronic device.
The upper wall is inclined with respect to the installation surface so that the other end side has a lower height from the installation surface than the one end side,
At least one lower wall portion of the lower wall is along the installation surface, and a lower intake port in the centrifugal blower is along the one lower wall portion,
The electronic device according to claim 2. A heat dissipating part facing the air outlet and in contact with the electronic component;
A mounting portion that is arranged facing the opening, and to which the centrifugal blower is mounted so that the air blowing port is positioned between the substrate and the lower wall;
A flow path member that extends from above the centrifugal blower toward the upper corner of the other end of the centrifugal blower, and forms a flow path of air flow from the blower opening to the heat radiating portion;
The electronic device according to claim 2 or 3, comprising: The flow path member is a first flow path member,
A second flow path member that extends from the lower wall of the housing toward the lower corner of the other end of the centrifugal blower and forms a flow path of air flow from the blower opening toward the heat dissipation part; ,
The electronic device according to claim 4. The centrifugal blower has a thickness that is reduced from the one end side to the other end side of the casing.
The electronic device of any one of Claims 1-5.

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