JP3606062B2 - Information processing apparatus having cooling structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an information processing apparatus such as a personal computer, and more particularly to an information processing apparatus having a cooling structure for radiating heat from internal heat generating components.
[0002]
[Prior art]
2. Description of the Related Art In recent years, information processing apparatuses such as personal computers have increased in heat generation from electronic components such as internal ICs as their performance increases. In particular, an electronic component that generates heat, such as an MPU, cannot secure its operating performance unless it dissipates heat. Therefore, it is necessary to dissipate heat from the surface of the component using a cooling fan, a heat dissipation plate, or the like. On the other hand, a portable information processing apparatus is required to be downsized in order to improve portability, and a large heat dissipation plate and a space for heat dissipation cannot be secured inside. For this reason, a highly heat-conductive material is used for the bottom case of the housing, and a part of the surface of the heat generating electronic component mentioned above is brought into contact with the case, and the bottom case is used as a heat radiating plate to realize heat dissipation of the heat generating component. ing.
[0003]
FIG. 3 is a cross-sectional view showing the internal structure of an information processing apparatus having a conventional cooling structure. In the figure, 21 is a main body of the information processing apparatus, 21a is a bottom case made of a material having high heat conductivity such as aluminum, 22 is a printed wiring board built in the main body 21, and 23 is a printed wiring board 22. An electronic component that generates heat during operation of the mounted MPU, etc. 24 has a high heat transfer material such as aluminum in which one end is in contact with a part of the surface of the electronic component 23 and the other end is in contact with the bottom case 21a. The heat transfer plate 25 formed in the above is a display unit rotatably attached to the main body unit 21 by a hinge unit (not shown).
[0004]
The operation of the information processing apparatus having the conventional cooling structure will be described below. While the information processing apparatus is in operation, a large number of electronic components mounted on the printed wiring board 22 generate heat. However, the heat of the surface of the electronic component 23 that generates heat such as MPU is transmitted through the 24 heat transfer plates to the bottom. Heat is transferred to the inner surface of the case 21a and discharged from the outer surface of the bottom case 21a to the outside of the main body 21. In this way, the electronic component 23 is cooled.
[0005]
[Problems to be solved by the invention]
In the information processing apparatus having such a conventional cooling structure, in order to increase the heat radiation efficiency, it has been important to transfer the inner heat more efficiently to the outer side. On the other hand, portable information processing devices are becoming more compact and have increased opportunities for use on the knees when used outdoors, increasing heat dissipation to the bottom case and increasing the surface temperature of the bottom case. Doing not only discomforts the operator who uses it on the knee, but also has the risk of causing low temperature burn injury.
[0006]
The present invention solves such a conventional problem, increases the heat radiation efficiency from the bottom case of the heat generating component inside the portable information processing apparatus, and gives discomfort even when used on the knee. An object of the present invention is to provide an information processing apparatus having a cooling structure in which the temperature rise of the knee contact portion is suppressed to be low.
[0007]
[Means for Solving the Problems]
In order to solve this problem, the present invention provides a bottom case with high heat dissipation / heat transfer performance to dissipate heat from heat-generating components inside the information processing device, and a tilt made of a material with high heat insulation on the outside of the bottom case. A case is arranged, and when the display unit is opened in conjunction with opening and closing of the display unit, the case is moved away from the bottom case.
[0008]
Thereby, in a state of not being used, that is, in a state where the display unit is closed, the tilt case is in close contact with the bottom case, so that the portability of the apparatus is not impaired. In the use state, that is, when the display unit is open, the bottom case and the tilt case are separated from each other, so even if heat generated in the information processing device is transferred to the bottom case, this heat is not transferred to the tilt case. The heat is radiated to the space between the tilt case and the bottom case. Even when a portable information processing device is used on the knee in this state, heat is not transferred to the knee, so the bottom case can be made of a material with higher heat transfer and heat dissipation performance. More efficient heat dissipation of the heat-generating component becomes possible.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention, there is provided a portable information processing apparatus having an electronic component that generates heat inside the apparatus, a bottom case made of a material having high heat transfer / heat dissipation performance, and an outer side of the bottom case. In addition, an information processing apparatus having a cooling structure including a tilt case made of a highly heat-insulating material, heat from the bottom case is not transferred to the tilt case. Even when a portable information processing device is used on the knee in this state, heat is not transferred to the knee, so the bottom case can be made of a material with high heat transfer and heat dissipation performance, enabling effective heat dissipation. It has the action.
[0010]
According to a second aspect of the present invention, in the information processing apparatus having the cooling structure according to the first aspect, the heat generating electronic component directly contacts the bottom case or indirectly through another heat transfer component. It has the effect | action which can discharge | release the heat | fever of an electronic component efficiently outside.
[0011]
According to a third aspect of the present invention, in the information processing apparatus having the cooling structure according to the first aspect, the tilt case is attached to the bottom case so as to be openable and closable. Because the heat is dissipated into the space that can be opened by opening it to the bottom case, even when a portable information processing device is used on the knee, heat is not transferred to the knee, and even when used on a desk Therefore, the bottom case can be made of a material having higher heat transfer / heat dissipation performance, and has an effect of enabling more effective heat dissipation.
[0012]
According to a fourth aspect of the present invention, there is provided the information processing apparatus having the cooling structure according to the third aspect, further comprising a display unit attached to a main body unit having a heat generating component so as to be opened and closed, and for opening and closing the display unit. When the display unit is opened, the tilt case moves in a direction away from the bottom case. In conjunction with the opening of the display unit, the tilt case moves between the tilt case and the bottom case. Since a space is created, the heat can be automatically radiated using this space during use.
[0013]
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1 shows an information processing apparatus having a cooling structure according to an embodiment of the present invention, and is a sectional view showing an internal structure in a state where a display unit is opened, that is, in a use state. FIG. 2 is a cross-sectional view showing an internal structure in a state in which the display unit is closed, that is, in a non-use state such as when being carried. In the figure, 1 is a main body of an information processing apparatus, 1a is a bottom case made of a material having high heat conductivity such as aluminum, 2 is a printed wiring board built in the main body 1, and 3 is a printed wiring board 2. Electronic parts 4 that generate heat during operation of the mounted MPU, etc. 4 has a high heat transfer material such as aluminum with one end in contact with part of the surface of the electronic part 3 and the other end in contact with the bottom case 1a. The heat transfer plate 5 formed in the above is a display unit that is rotatably attached to the main body unit 1 by a hinge unit (not shown). Reference numeral 6a denotes a gear A that rotates coaxially with the rotation axis of the hinge portion and rotates in the same angle and in the same direction as the display portion 5 is opened and closed. The center axis of the gear C of 6c is fixed to the bottom case 1a so as to rotate about 100 ° while the gear A6a rotates about 135 °, that is, while the display unit 5 rotates about 135 °. The gear B of 6b has a central axis fixed to the bottom case 1a, and transmits the rotation of the gear A6a to the gear C6c. Reference numeral 7 denotes a tilt case, which is formed of a highly heat-insulating material such as a resin, and is disposed outside so as to cover the bottom case 1a. One end of the tilt case is rotatably attached to the bottom case 1a by an axis A8. . A crank arm 9 has one end rotatably attached to the other end of the tilt case 7 and the other end rotatably attached to an axis B10 disposed near the outer periphery of the gear C6c. The gear C6c rotates between the position of the axis B10 with the display unit 5 closed and the position of the axis B10 with the display unit 5 opened 135 °. The crank arm 9 has such a length that the tilt case 7 is in close contact with the bottom case 1a with the display unit 5 closed.
[0014]
Hereinafter, the operation of the information processing apparatus having the cooling structure of the present invention will be described. During the operation of the information processing apparatus, the display unit 5 is opened for operation. At this time, the gear A6a rotates in synchronization with the display unit 5, and this rotation is transmitted to the gear C6c via the gear B6b. When the gear C6c rotates, the position of the shaft B10 disposed near the outer periphery thereof also moves downward to push down the crank arm 9. The crank arm 9 pushes down the tilt case 7 with the axis A8 as a fulcrum and opens so that the tilt case 7 is separated from the bottom case 1a. On the other hand, as the operation of the apparatus continues, the electronic component 3 mounted on the printed wiring board 2 generates heat and becomes high temperature, and is transferred to the bottom case 1a via the heat transfer plate 4, and the bottom case 1a. Becomes hot. At this time, since there is a space between the tilt case 7 and the bottom case 1a, heat is released from the surface of the bottom case 1a to the outside air, and the bottom case 1a is cooled. By repeating this, the heat quantity of the electronic component 3 that generates heat inside the apparatus is released to the outside air, and the electronic component is cooled. At this time, since the tilt case 7 having high heat insulation performance is also insulated by the outside air, the amount of heat is difficult to be transmitted and does not reach a high temperature. Therefore, heat is transmitted to the knee even when the information processing apparatus is used on the knee while being carried. Absent. Further, even when used on a desk, a heat radiation space is secured, so that the cooling effect is enhanced and the desk is not affected by heat.
[0015]
In this way, it is possible to provide a comfortable operating environment by preventing temperature rise at the part where the operator directly touches, so it is possible to dissipate a larger amount of heat from the bottom case and provide a highly efficient heat dissipation structure It becomes possible to do.
[0016]
In the present embodiment, one end of the tilt case 7 is rotatably attached to the bottom case 1a. However, it goes without saying that the tilt case 7 may be attached so as to move in parallel with the bottom case 1a. Nor.
[0017]
【The invention's effect】
As described above, according to the present invention, in a state where the display unit is opened and the portable information device is operated, the temperature rise at the part where the operator touches the knee or the like can be suppressed, and as a result, more The heat effect can be radiated to the bottom case to obtain an advantageous effect that heat can be radiated with high efficiency.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an internal structure of a portable information processing apparatus having a cooling structure according to an embodiment of the present invention when a display unit is opened. FIG. 3 is a cross-sectional view showing the internal structure of a portable information processing apparatus having a cooling structure when the display unit is closed. FIG. 3 is a cross-sectional view showing the internal structure of a portable information processing apparatus having a conventional cooling structure. Explanation of]
DESCRIPTION OF SYMBOLS 1a Bottom case 2 Printed wiring board 3 Electronic component 4 Heat-transfer plate 5 Display part 6a Gear A
6b Gear B
6c Gear C
7 Tilt case 8 Axis A
9 Crank arm 10 Axis B

Claims (4)

In an information processing apparatus having an electronic component that generates heat inside the apparatus, a bottom case made of a material having high heat transfer / heat dissipation performance, and a tilt case made of a material having high heat insulation on the outside of the bottom case. An information processing apparatus having a cooling structure. 2. The information processing apparatus having a cooling structure according to claim 1, wherein the heat generating electronic component is in direct contact with the bottom case or indirectly through another heat transfer component. 2. The information processing apparatus having a cooling structure according to claim 1, wherein the tilt case is attached to the bottom case so as to be openable and closable. A display unit attached to a main body unit having a heat generating part so as to be opened and closed is interlocked with opening and closing of the display unit, and the tilt case moves away from the bottom case in a state where the display unit is opened. The information processing apparatus according to claim 3, further comprising a cooling structure.

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