JP2018109799A - Electronic device - Google Patents

Abstract

An electronic device capable of suppressing noise generation even when a fan receives an external force through a housing is provided. A tablet computer (1) incorporates a fan (30) in a housing (10). The fan 30 has fan blades 39 and a duct-like case 32 that houses the fan blades 39 . The duct-like case 32 has a plane portion 33p and a plane portion 34p which are arranged on both sides in the direction of the rotation axis Cr of the fan blade 39 with a gap therebetween. A strut 34s is provided in the vicinity of the outer periphery of the fan blade 39 between the plane portion 33p and the plane portion 34p. A rib 12s is provided that protrudes from a plane portion 12p facing the plane portion 33p of the housing 10 toward the support 34s or its vicinity. A rib 11s is provided that protrudes from a plane portion 11p facing the plane portion 34p in the housing 10 toward the support 34s or its vicinity. [Selection drawing] Fig. 7

Description

  The present disclosure relates to an electronic device including a fan.

  Patent document 1 is disclosing the electronic device which incorporates a fan. In the electronic device disclosed in Patent Document 1, a through hole is provided in the shaft of the fan motor along the axial direction thereof, and a column that functions as a tension rod is inserted into the through hole inside the device housing of the electronic device. . Thus, stable rotation can be maintained even when the fan motor receives external force.

Japanese Patent Laying-Open No. 2015-200217

  When the fan receives an external force through the housing, the fan blade and the fan case may come into contact with each other, and noise may be generated.

  The present disclosure provides an electronic device capable of suppressing the generation of abnormal noise even when a fan receives an external force via a housing.

The electronic device according to the present disclosure is an electronic device in which a fan is built in a housing.
The fan includes a fan blade and a duct-like case that accommodates the fan blade.
The duct-like case has a first case plane portion and a second case plane portion that are arranged with a gap therebetween on both sides in the rotational axis direction of the fan blade.
A support column is provided near the outer periphery of the fan blade between the first case plane portion and the second case plane portion.
A first projecting portion that projects from the first housing planar portion facing the first case planar portion in the housing toward the column or the vicinity thereof is provided.
A second protrusion that protrudes from the second case flat part facing the second case flat part in the case toward the column or the vicinity thereof is provided.

  According to the present disclosure, it is possible to suppress the generation of abnormal noise from the fan disposed in the housing.

1 is a plan view of a tablet computer according to Embodiment 1. FIG. It is a perspective view of the back side of a tablet type computer. FIG. 6 is a perspective view showing a mounting portion of a fan by removing a rear housing in the tablet computer. In a tablet computer, it is the disassembled perspective view which separated and showed the rear housing | casing, the fan unit, and the front housing | casing. FIG. 5 is an enlarged exploded perspective view in which a fan mounting portion is enlarged in FIG. 4. It is the figure explaining the arrangement | positioning relationship between the rib of a rear housing | casing, the support | pillar of a fan unit, and the rib of a front housing | casing. It is sectional drawing by the AA line of FIG.

  Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed descriptions of already well-known matters and repeated descriptions for substantially the same configuration may be omitted. This is to avoid the following description from becoming unnecessarily redundant and to facilitate understanding by those skilled in the art.

  The inventor provides the accompanying drawings and the following description in order for those skilled in the art to fully understand the present disclosure, and is not intended to limit the subject matter described in the claims. Absent.

(Embodiment 1)
The first embodiment will be described below with reference to the drawings.

[1. Constitution]
[1-1. Overview]
FIG. 1 is a plan view of the tablet computer according to the first embodiment. The tablet computer 1 is an example of an electronic device. A display unit 5 having a touch panel is provided on the front surface of the tablet computer 1. The tablet computer 1 contains various electronic components such as a central processing unit (CPU), a memory, a solid state drive (SSD), an image processor, and a communication module. A fan 30 for discharging heat generated by various electronic components such as the CPU to the external space is provided inside one corner of the tablet computer 1.

[1-2. Fan support structure]
FIG. 2 is a perspective view of the rear side of the tablet computer 1. The fan 30 is accommodated in one corner of the housing 10 of the tablet computer 1, and a first exhaust port 10 a and a second exhaust port 10 b are provided on the side portion of the corner portion. In the drawings subsequent to FIG. 2, direction indications are appropriately attached. This direction display indicates the direction when the tablet computer is used in a general usage method, and will be described below using this direction display for easy understanding of the description. In the present embodiment, the horizontal direction in the figure is associated with the apparatus width direction, the front-rear direction is associated with the apparatus thickness direction, and the vertical direction is associated with the apparatus vertical direction. The front surface is a surface on which the display unit 5 is provided, and the rear surface is a surface on which the display unit 5 is not provided (back surface).

  FIG. 3 is a perspective view showing the mounting portion of the fan 30 by removing the rear housing 12 (see FIG. 4) in the tablet computer 1. The fan 30 includes a fan blade 39, a motor 31 that rotationally drives the fan blade 39, and a duct-shaped duct-shaped case 32. In FIG. 3, the fan blade 39 is simplified and described as a circle, but the fan blade 39 has a plurality of wings. The same applies to other drawings. The duct-like case 32 is provided with two exhaust ports 32b, and the first cooling fin unit 35 and the second cooling fin unit 36 are connected to the exhaust ports 32b. An air inlet 32 a is formed in the upper surface cover of the duct-like case 32. The exhaust port 35 a of the first cooling fin unit 35 faces the first exhaust port 10 a of the housing 10, and the exhaust port 36 a of the second cooling fin unit 36 faces the second exhaust port 10 b of the housing 10. Yes. The heat generated by the CPU is conducted to the first cooling fin unit 35 and the second cooling fin unit 36 via the heat conductor 37 and the connection member 38, and the conducted heat is heat-exchanged with the wind from the fan 30. Then, the air is exhausted from the first exhaust port 10a and the second exhaust port 10b of the housing 10.

  FIG. 4 is an exploded perspective view showing the rear case 12, the fan 30, and the front case 11 separately in the tablet computer 1. FIG. 5 is an enlarged exploded perspective view in which the mounting portion of the fan 30 in FIG. 4 is enlarged. 4 and 5, the rear housing 12 is shown in a see-through state in which the structure on the back side can be seen through.

  As shown in FIGS. 4 and 5, the tablet computer 1 has a rear case 12 and a front case 11 as a case 10, and the fan 30 is between these cases 11 and 12. Placed in. Each of the rear housing 12 and the front housing 11 is made of a magnesium alloy.

  The duct-shaped case 32 includes a rear case 33 (see FIG. 3) and a front case 34. The rear case 33 constitutes a case on the rear case 12 side in the duct-like case 32, and the front case 34 constitutes a case on the front case 11 side in the duct-like case 32.

  The rear case 33 is made of a flat thin metal plate. The rear case 33 has a flat portion 33p and an intake port 32a formed of a circular opening formed in the flat portion 33p. The rear case 33 may be made of resin.

  The front case 34 is made of resin. The front case 34 may be made of metal.

  The front case 34 includes a flat surface portion 34p, a screw fixing portion 34m, a vertical surface portion 34r, and a plurality of columns 34s. The motor 31 is fixed to the plane portion 34p. The screw fixing part 34m is a part for fixing the fan 30 to the front casing 11, and is fixed to the screw boss 11m of the front casing 11 using screws. The vertical surface portion 34 r connects the edge of the flat surface portion 34 p of the rear case 33 and the edge of the flat surface portion 34 p of the front case 34 except for a portion that becomes the exhaust port 32 b of the fan 30.

  The support 34s is a protrusion that extends from the flat surface 34p of the front case 34 toward the rear case 33, and in the state where the rear case 33 and the front case 34 are combined, the tip of the post 34s abuts on the rear case 33 (see FIG. 7).

  FIG. 6 is a diagram illustrating the positional relationship among the ribs 12s and 12r of the rear housing 12, the support post 34s of the fan 30, and the ribs 11s and 11r of the front housing 11. 7 is a cross-sectional view taken along line AA in FIG. In FIG. 6, the ribs 12 s and 12 r of the rear housing 12 and the ribs 11 s and 11 r of the front housing 11 are displayed on the flat portion 34 p of the front case 34 of the duct-like case 32. In order to facilitate understanding of the arrangement relationship, these are classified and shown by dotted lines, two-dot chain lines, and the like.

  The support post 34s is disposed in the vicinity of the exhaust port 32b. Further, the plurality of support posts 34s are arranged in the vicinity of the outer periphery of the fan blade 39 so as to be distributed in the circumferential direction around the rotation axis Cr of the motor 31 (fan blade 39). The number and arrangement of the plurality of struts 34s are set so that an increase in exhaust resistance can be suppressed as much as possible. The length of the plurality of support posts 34s is set to be larger than the thickness of the fan blade 39 (the length in the direction of the rotation axis Cr).

  The rear housing 12 is provided with a plurality of ribs 12s and 12r. The rib 12s protrudes toward the support post 34s or the vicinity thereof. The rib 12s extends in an arc shape around the rotation axis Cr in the vicinity of the outer periphery of the fan blade 39. The rib 12r protrudes toward the edge 32w of the duct-shaped case 32 or the vicinity thereof. The ribs 12r extend radially from the rotational axis Cr.

  The front housing 11 is provided with a plurality of ribs 11s and 11r. The rib 11s protrudes toward the support post 34s or the vicinity thereof. The rib 11s extends in an arc shape around the rotation axis Cr in the vicinity of the outer periphery of the fan blade 39. The rib 11r protrudes toward the edge portion 32w of the duct-shaped case 32 or the vicinity thereof. The rib 11r extends along the edge 32w of the duct-like case 32.

  As shown in FIG. 6, when the plurality of ribs 12 r and the plurality of ribs 11 r are projected onto the flat surface portion 34 p of the front case 34 of the duct-like case 32, they overlap the edge portion 32 w of the duct-like case 32. The plurality of ribs 12r and the plurality of ribs 11r are formed in portions other than the plurality of ribs 12r and the plurality of ribs 11r even when the external force of a certain level or more is applied to the front or rear surface of the tablet computer 1 and deformed in the direction of the fan 30. The duct-like case 32 is provided to leave a certain gap between the front case 34 and the rear case 33 and the front case 11 and the rear case 12. Since the rear case 33 is provided with the air inlet 32a, the ribs 12r are provided radially from the rotational axis Cr so as not to hinder the flow of air to the air inlet 32a.

  Among the plurality of pillars 34s, the plurality of ribs 12s, and the plurality of ribs 11s, the pillars 34s, the ribs 12s, and the ribs 11s indicated by the arrow X are formed on the flat portion 34p of the duct-like case 32 as shown in FIG. When projected, they overlap each other. In this portion, as shown in FIG. 7, the tips of the plurality of ribs 12 s and the plurality of ribs 11 s are spaced apart from the front case 34 and the rear case 33 of the duct-like case 32 with a small gap, respectively. Yes.

  According to such a configuration, when an external force of a certain level or more is applied to the front or rear surface of the tablet computer 1, the front or rear surface of the tablet computer 1 is bent and deformed in the direction of the fan 30, and the plurality of ribs 12s and the plurality of ribs 12s Any of the ribs 11s contacts the duct-like case 32. At this time, this force is received by the column 34 s of the duct-like case 32. Therefore, it is suppressed that the front surface (plane part 11p) and the rear surface (plane part 12p) of the housing | casing 10 of the tablet-type computer 1 are further bent and deformed. Further, the flat portions 33p and 34p of the duct-like case 32 themselves are also suppressed from being deformed by the pillars 34s of the duct-like case 32. Further, since the support post 34s is disposed in the vicinity of the outer periphery of the fan blade 39, the deformation of the portion near the fan blade 39 in the flat portion 33p and the flat portion 34p of the duct-like case 32 is particularly suppressed. Therefore, the flat portion 33p and the flat portion 34p of the duct-like case 32 and the fan blade 39 are prevented from coming into contact with each other, and the generation of noise due to the contact is also suppressed.

  Further, the plurality of support pillars 34s are distributed in the circumferential direction around the rotation axis Cr in a portion in the vicinity of the exhaust port 32b, which is not provided with the vertical surface portion 34r in the duct-like case 32 and tends to be weak against external force. Therefore, the strength of the exhaust port 32b can be improved appropriately and in a balanced manner.

[2. Effect]
The tablet computer 1 (an example of an electronic device) according to the first embodiment includes a fan 30 in a housing 10.
The fan 30 includes a fan blade 39 and a duct-like case 32 that accommodates the fan blade 39.
The duct-like case 32 has a flat surface portion 33p (first case flat surface portion) and a flat surface portion 34p (second case flat surface portion) that are arranged with a gap between them on both sides of the fan blade 39 in the direction of the rotational axis Cr. .
A support post 34s is provided in the vicinity of the outer periphery of the fan blade 39 between the flat portion 33p (first case flat portion) and the flat portion 34p (second case flat portion).
Ribs 12s (first projecting portions) projecting from the planar portion 12p (first housing planar portion) facing the planar portion 33p (first case planar portion) in the housing 10 toward the support column 34s or the vicinity thereof. Is provided.
Ribs 11s (second projecting portions) projecting from the planar portion 11p (second housing planar portion) facing the planar portion 34p (second case planar portion) in the housing 10 toward the column 34s or the vicinity thereof. Is provided.

  Thereby, it is possible to suppress the generation of abnormal noise from the fan 30 arranged in the housing 10.

In the tablet computer 1 of Embodiment 1,
The duct-like case 32 connects the edge of the flat surface portion 33p (first case flat surface portion) and the edge of the flat surface portion 34p (second case flat surface portion) except for the portion serving as the exhaust port 32b (ventilation port). It has a vertical surface portion 34r.
The support column 34s is disposed in the vicinity of the exhaust port 32b (ventilation port).

  As a result, the strength of the exhaust port 32b (ventilation port) portion of the duct-like case 32 that is relatively weak against the external force in the thickness direction can be reinforced by the support column 34s.

In the tablet computer 1 of Embodiment 1,
A plurality of support posts 34s are provided in the vicinity of the exhaust port 32b (ventilation port) in a circumferential direction around the rotation axis Cr of the fan blade 39.

  Thereby, the intensity | strength of the exhaust port 32b (ventilation port) part can be improved appropriately and with sufficient balance.

In the tablet computer 1 of Embodiment 1,
The first protrusion is a rib 12 s that extends in an arc shape around the rotation axis Cr of the fan blade 39.

  Accordingly, when an external force is applied to the flat surface portion 11p (second housing flat surface portion) of the housing 10 and the rib 12s comes into contact with the flat surface portion 34p (second case flat surface portion) of the duct-shaped case 32, a linear shape is obtained. Abut. Therefore, the external force is distributed and applied in a linear manner to the flat portion 34p (second case flat portion) of the duct-like case 32. Therefore, the flat portion 34p (second case flat portion) of the duct-like case 32 is suppressed from being deformed into a distorted shape. Therefore, the flat portion 34p (second case flat portion) is further suppressed from coming into contact with the fan blade 39, and thus the generation of abnormal noise is further suppressed.

In the tablet computer 1 of Embodiment 1,
The second projecting portion is a rib 11 s that extends in an arc shape around the rotation axis Cr of the fan blade 39.

  Thereby, when an external force is applied to the flat surface portion 12p (first housing flat surface portion) of the housing 10 and the rib 11s comes into contact with the flat surface portion 33p (first case flat surface portion) of the duct-shaped case 32, a linear shape is obtained. Abut. Therefore, the external force is distributed and applied in a linear manner to the flat portion 33p (first case flat portion) of the duct-like case 32. Therefore, the flat portion 33p (first case flat portion) of the duct-like case 32 is suppressed from being deformed into a distorted shape. Therefore, the flat surface portion 33p (first case flat surface portion) is further suppressed from coming into contact with the fan blade 39, and thus the generation of abnormal noise is further suppressed.

(Other embodiments)
As described above, the first embodiment has been described as an example of the technique disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can also be applied to an embodiment in which changes, replacements, additions, omissions, and the like are appropriately performed. Moreover, it is also possible to combine each component demonstrated in the said Embodiment 1, and it can also be set as a new embodiment. Therefore, other embodiments will be exemplified below.

(1) In the said embodiment, the case where the ventilation port was the exhaust port 32b was illustrated. However, in the present disclosure, the ventilation port may be an intake port.

(2) In the said embodiment, the case where the support | pillar of the duct-shaped case was formed in the front case was illustrated. However, in the present disclosure, the support column may be formed on the rear case.

(3) In the said embodiment, the case where the vertical surface part of the duct-shaped case was formed in the front case was illustrated. However, in the present disclosure, the vertical surface portion may be formed in the rear case.

(4) In the above embodiment, the case where the electronic device is a tablet computer has been exemplified. However, the electronic device of the present disclosure can be widely applied to smartphones, notebook computers, desktop computers, and other electronic devices.

  As described above, the embodiments have been described as examples of the technology in the present disclosure. For this purpose, the accompanying drawings and detailed description are provided. Accordingly, among the components described in the accompanying drawings and the detailed description, not only the components essential for solving the problem, but also the components not essential for solving the problem in order to illustrate the above technique. May also be included. Therefore, it should not be immediately recognized that these non-essential components are essential as those non-essential components are described in the accompanying drawings and detailed description. Moreover, since the above-mentioned embodiment is for demonstrating the technique in this indication, a various change, replacement, addition, abbreviation, etc. can be performed in a claim or its equivalent range.

  The present disclosure can be widely used in electronic devices having a built-in fan.

DESCRIPTION OF SYMBOLS 1 Tablet type computer 5 Display part 10 Housing | casing 10a 1st exhaust port 10b 2nd exhaust port 11 Front surface case 11p Flat surface part 11s Rib 11r Rib 11m Screw boss 12 Rear surface case 12p Flat surface part 12r Rib 12s Rib 30 Fan 31 Motor 32 Duct-shaped case 32a Intake port 32b Exhaust port 32w Edge 33 Rear case 33p Plane part 34 Front case 34p Plane part 34r Vertical face part 34s Strut 34m Screw fixing part 35 First cooling fin unit 36 Second cooling fin unit 37 Thermal conductor 38 Connection member 39 Fan blade

Claims (5)

An electronic device with a built-in fan in a housing,
The fan has a fan blade and a duct-shaped case that houses the fan blade,
The duct-like case has a first case plane part and a second case plane part arranged with a gap between each other on both sides in the rotational axis direction of the fan blade,
Between the first case plane part and the second case plane part, a support column is provided in the vicinity of the outer periphery of the fan blade,
A first projecting portion projecting from the first housing planar portion facing the first case planar portion in the housing toward the column or the vicinity thereof is provided;
A second projecting portion projecting from the second housing planar portion facing the second case planar portion in the housing toward the column or the vicinity thereof is provided;
Electronics. The duct-like case has a vertical surface portion that connects an edge portion of the first case plane portion and an edge portion of the second case plane portion, except for a portion serving as a ventilation opening,
The support column is disposed in the vicinity of the ventilation opening.
The electronic device according to claim 1. In the vicinity of the ventilation port, a plurality of the support columns are provided in a distributed manner in a circumferential direction around the rotation axis of the fan blade.
The electronic device according to claim 2. The first protrusion is a rib extending in an arc shape around the rotation axis of the fan blade.
The electronic device according to any one of claims 1 to 3. The second protrusion is a rib extending in an arc shape around the rotation axis of the fan blade.
The electronic device according to any one of claims 1 to 3.

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