JPH08272487A - Electronic equipment - Google Patents

Abstract

PURPOSE: To attain a compact and light-weight structure and the mounting of high density for an equipment which radiates its heat by a natural conversion and also to reduce the dependency on the radiation effect even with an equipment using a fan for the saving of electric power by transmitting the heat generated in a using state of an electronic equipment main body to an external substance in order to improve the radiation effect. CONSTITUTION: A laptop type electronic equipment has a display part and a easing 2 of the display part is turned toward A around a rotary shaft 9. Thus the electronic equipment is set in its using state. At the same time, a gear 17 attached to the shaft 9 turns toward C together with the gears 18 and 19 turning toward D and E respectively. In this instance, a push rod 20 attached to the gear 19 starts its turning toward F and a plate member 21 is pushed down with a radiation member 22 pushed onto a floor surface 6 respectively. Under such conditions, the heat is transmitted through a heating part 10, a radiation member 11, the plate member 21, the radiation member 22 and then the floor surface 6. If the surface 6 is identical with a metallic desk surface, etc., the radiation effect is more improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device having a heating element.

[0002]

2. Description of the Related Art Conventionally, in electronic equipment such as word processors and personal computers, as a heat radiation measure, generally a hole (air hole) through which air escapes is provided in the housing of the equipment main body. The structure of radiating heat to the outside of the device body by natural convection of the inside air or providing a fan inside the device body and forcibly radiating heat to the outside of the device body by the fan has been widely adopted.

[0003]

However, in the structure as in the above-mentioned conventional example, the CPU will be mounted at a higher density to increase the speed in the future, and the heat generation of the element will be further increased. It will not be possible to deal with it only by heat dissipation using. In addition, from the standpoint of promoting miniaturization, energy saving, and cost reduction, the current situation is to avoid using fans as much as possible.

As described above, as a measure against the internal temperature of the device body,
How to improve the efficiency of heat dissipation and let the heat escape to the outside is an important issue when designing equipment.

[0005]

In order to solve the above-mentioned problems, an electronic device according to the present invention is a laptop type electronic device having a display section, wherein a heating element and the display section are provided. And a heat radiating member that is exposed to the outside of the device body and radiates heat generated by the heating element to the outside of the device body when the display unit is opened.

According to this structure, since the substance outside the main body of the device is used for heat dissipation, the heat dissipation effect is greatly improved.

[0007]

【Example】

(Embodiment 1) Hereinafter, Embodiment 1 of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a schematic cross section of an electronic device according to a first embodiment of the present invention when not in use. The electronic device shown in FIG. 1 includes a housing 1 of a device body and a housing 2 of a display unit.

The housing 1 of the device body supports a keyboard 4 for inputting document information, rubber feet 5 for supporting the device body, a PCB (personal computer board) 7 on which various elements are mounted, and a PCB 7. Material 8, main heat generating part 10 inside the device body, heat dissipation materials 11, 22 using materials such as aluminum having high thermal conductivity of around 230 W · m −1 · K −1,
Heat dissipation holes 12 and 13 for releasing heat to the outside of the device main body, a fan 14 for heat dissipation, a temperature sensor 15 for detecting the internal temperature of the main body of the device, a support member 16 for the keyboard 4, and rotating in conjunction with each other. Gears 18, 19, a push rod 20 attached to the gear 19, a plate member 21 made of a material such as a copper plate having a high thermal conductivity of about 400 W · m −1 · K −1 and a large elastic modulus, and the operation of the fan is controlled. The fan control device 24 is provided, and the heat dissipating member 11 is attached to the heat generating portion 10, the plate member 21 is attached to the heat dissipating member 11, and the heat dissipating member 22 is attached to the plate member 21.

Further, the casing 2 of the display unit is attached to the display unit 3 for displaying document information and the like, the rotating shaft 9, and the rotating shaft 9 so that the movement of the display unit casing 2 at the time of opening and closing of the device body can be prevented. Case 1
It has a gear 17 that communicates with an internal gear 18.

In FIG. 1, when the casing 2 of the display section is rotated in the direction A about the rotary shaft 9 as an axis to set the electronic device from the unused state to the used state, the gear 17 attached to the rotary shaft 9 is rotated. Starts rotating in the C direction, at the same time, the gear 18 starts rotating in the D direction, and the gear 19 starts rotating in the E direction. At this time, the push rod 20 attached to the gear 19
Starts rotating in the F direction. Here, when the push rod 20 moves in the F direction, it hits the plate member 21, and the plate member 21 is pushed down. Then, as shown in FIG. 2, the heat radiation material 22 is pressed against the floor surface 6. Here, the heat transmission path is a flow such as the heat generating portion 10, the heat dissipation material 11, the plate material 21, the heat dissipation material 22, and the floor 6.

The floor surface 6 has a thermal conductivity of 100 W · m −1.
・ In the case of an office desk made of metal, which is as high as around K-1, heat can be dissipated only by using the heat dissipating material 22.
The thermal conductivity of the floor surface 6 is 0.14 to 0.18 W ・ m-1 ・ K-1
Not only in the case of a low wooden desk, but also in the case of an office desk made of metal on the floor 6, the thermal conductivity will be extremely low if paper etc. is placed on it. It becomes impossible to radiate heat.

As described above, when it is not possible to radiate heat to the outside of the device body as desired, and when the internal temperature of the device body is about to exceed the element destruction limit temperature, it is necessary to operate the fan 14. Come on. A block diagram relating to the operation of the fan in that case is shown in FIG. 3, and a flow chart is shown in FIG.

As is apparent from FIG. 3, the fan controller 24 is built in the ROM 25 based on the signal from the temperature detector 15 for detecting the temperature of the fan according to the program represented by the flowchart of FIG. 14 to control the operation.

The procedure of this process will be described below with reference to the flowchart of FIG. First, go to step S1,
The temperature sensor 15 determines whether the internal temperature of the device body has reached the performance maintaining limit value. If not reached, the process returns to the start, and if reached, the process proceeds to step S2 to turn on the SW (switch) of the fan 14. Next, in step S3, the temperature sensor 15 determines again whether or not the internal temperature of the device body has reached the performance maintaining limit value. When it reaches, it returns to step S3, and when it does not reach, it progresses to step S4, turns off the SW of the fan 14, and returns to step S1.

Incidentally, in order to return the electronic device from the used state to the unused state, as shown in FIG.
Rotate in the direction. Then, the gear 17 attached to the rotating shaft 9 rotates in the G direction, the gear 18 rotates in the H direction, and the gear 19 rotates in the I direction. At this time, the push rod 20 attached to the gear 19 rotates in the J direction to release the pressing of the plate member 21. As described above, since the plate member 21 is made of a material such as a copper plate having a large elastic modulus, the plate member 21 deformed in FIG. 2 is immediately restored to the original state as shown in FIG.

(Embodiment 2) FIG. 5 is a sectional view of an electronic device according to Embodiment 2 of the present invention. The parts common to or corresponding to those in the first embodiment are designated by the same reference numerals as those in FIGS. 1 and 2. Further, the description of the common part is omitted.

As shown in FIG. 5, a heat radiating material 11 made of a material such as aluminum having a high thermal conductivity of around 230 W · m −1 · K −1 is closely attached to the heat generating portion 10, The heat dissipating material 11 also functions as a supporting leg that supports the housing 1 of the device body, and has a thermal conductivity of 230% like the heat dissipating material 11.
A heat radiating material 23 made of a material such as aluminum, which is as high as around W · m −1 · K −1, is attached. The heat radiating material 23 is always in contact with the floor surface 6, and the flow of heat is in the order of the heat generating portion 10, the heat radiating material 11, the heat radiating material 23, and the floor surface 6.

[0019]

As described above, according to the present invention,
Since the heat generated when the device is in use is transferred to the substance outside the device body and the substance outside the device body is used for heat dissipation,
The heat radiation effect has been greatly improved, and the range of devices that used natural convection to radiate heat without using a fan has become wider than before, and it is possible to achieve high-density mounting. Even in equipment that is forced to
Reliance on the fan can be reduced, and power consumption can be reduced accordingly.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an unused electronic device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of an electronic device when in use according to the first embodiment of the present invention.

FIG. 3 is a block diagram related to operation control of a fan in the electronic device according to the first embodiment of the present invention.

FIG. 4 is a flowchart relating to operation control of a fan in the electronic device according to the first embodiment of the present invention.

FIG. 5 is a sectional view of an electronic device according to a second embodiment of the invention.

[Explanation of symbols]

 1 Case of device main body 2 Display case 3 Display 4 Key board 5 Rubber feet supporting device main body 6 Floor 7 PCB (personal computer board) 8 PCB support 9 Rotating shaft 10 Heat generating part 11 Heat dissipation material 12, 13 Heat dissipation hole 14 Fan 15 Temperature detector 16 Key board support material 17, 18, 19 Gears 20 Push rod 21 Plate material 22 Heat dissipation material 23 Support material that supports the body also serving as heat dissipation material 24 Fan control device 25 ROM (Read Only Memory)

Claims (6)

[Claims] 1. A laptop electronic device having a display unit, comprising: a heating element, which moves in conjunction with opening and closing of the display unit, and which is exposed to the outside of the device body when the display unit is open. And a heat radiating member for radiating the heat generated by the heating element to the outside of the device body. 2. The electronic device according to claim 1, wherein the heat dissipation material comes into contact with a substance outside the device body. 3. The electronic device according to claim 1, wherein the heat dissipation member is exposed at a bottom surface portion of the device body. 4. The temperature adjusting means based on the detecting means for detecting the internal temperature of the equipment body, the temperature adjusting means for adjusting the internal temperature, and the internal temperature detected by the detecting means and a predetermined temperature. The electronic device according to claim 1, further comprising a control unit that controls the operation of the electronic device. 5. The electronic device according to claim 4, wherein the temperature adjusting unit is a fan. 6. The electronic apparatus according to claim 4, wherein the control unit operates the temperature adjusting unit when the internal temperature detected by the detecting unit exceeds a predetermined temperature.