JP2002280774A - Electronic apparatus - Google Patents

Abstract

(57) [Problem] To provide an electronic device capable of further increasing heat radiation efficiency than discharging heat through a housing. SOLUTION: The electronic device 10 has a heat radiating portion 90 for radiating heat in a housing 12 to the outside, and the heat radiating portion 90 is a heat conductive member 60, 62, 6 arranged in close contact with the inside of the housing 12.
8, and thermally connected to the heat conducting members 60, 62, 68,
An external heat conducting member 76 is provided outside the housing 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic apparatus having a heat radiating portion for efficiently radiating heat in a housing to the outside.

[0002]

2. Description of the Related Art As an example of an electronic apparatus, a portable telephone, a video camera recorder, and the like need to release heat in a housing to the outside as the size thereof is reduced. In conventional electronic devices,
By making the heat uniform inside the housing, a part of the housing or the entire housing is used as a heat radiating portion. For example, a method of attaching a heat conductive sheet, metal, or the like as a heat conductive member to the surface of a housing has been adopted.

[0003]

However, in such a heat-dissipating method, even if the heat-dissipating area is maximized, only the surface of the housing is provided, and the heat-dissipating efficiency is not good. Moreover, when the user holds the housing, heat may be sensed from the entire housing. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-described problems and to provide an electronic device capable of further improving heat radiation efficiency than discharging heat through a housing.

[0004]

According to a first aspect of the present invention, there is provided an electronic apparatus having a heat radiating portion for radiating heat in a housing to the outside, wherein the heat radiating portion is disposed in close contact with the housing. An electronic apparatus comprising: a conductive member; and an external heat conductive member thermally connected to the heat conductive member and located outside the housing. In the first aspect, the heat conductive member is disposed in close contact with the inside of the housing. Thereby, the heat conductive member can release the heat in the housing to the outside through the housing. The external heat conductive member is thermally connected to the heat conductive member, and can discharge heat of the heat conductive member to the outside of the housing by being located outside the housing. Thus, heat in the housing of the electronic device can be more efficiently dissipated through the heat conducting member than in an electronic device in which the heat conducting member is disposed in the housing.

According to a second aspect of the present invention, in the electronic device according to the first aspect, the external heat conducting member is covered with a covering member.

According to a third aspect of the present invention, in the electronic device according to the first aspect, the heat conducting member and the external heat conducting member are metal.

According to a fourth aspect of the present invention, in the electronic device according to the first aspect, the heat conductive member and the external heat conductive member are silicon-based heat conductive sheets.

According to a fifth aspect of the present invention, in the electronic device according to the first aspect, the heat conductive member and the external heat conductive member are carbon-based heat conductive sheets.

According to a sixth aspect of the present invention, in the electronic device according to the first aspect, the heat conductive member is in close contact with a heating element of a circuit board disposed in the housing. In claim 6,
The heat generated by the heat generating element of the circuit board is radiated to the outside through the heat conductive member and the housing, and the heat generating element is connected to the heat generating element. Can be more efficiently dissipated through the heat conducting member and the external heat conducting member.

According to a seventh aspect of the present invention, in the electronic device according to the first aspect, the external heat conductive member is detachably fixed to the housing. According to the seventh aspect, the external heat conductive member can be detachably fixed to the housing as needed.

[0011]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Note that the embodiments described below are preferred specific examples of the present invention,
Although various technically preferable limits are given, the scope of the present invention is not limited to these modes unless otherwise specified in the following description.

FIGS. 1 and 2 show a mobile phone as an example of an electronic device. In this example, a mobile phone 10 has a battery 1.
00 is detachably mounted. The mobile phone 10 includes a housing 12, one battery 100, a display unit 16, an antenna 1
4, a speaker 22, a microphone 20, an operation unit 18, and the like. The battery 100 is a battery for supplying power to the mobile phone 10. The housing 12 includes a front part 24.
And a rear portion 26. As shown in FIG.
6 and on the back of the front part 24, the battery 100
Is detachably attached. The display section 16 is a section for displaying various information, and for example, a liquid crystal display device can be used. The speaker 22 is for listening to voice, and the microphone 20 is for inputting the voice of the operator. The operation unit 18 has a numeric keypad 18C, a button 18A for making a call, a button 18B for hanging up the call, and the like.

As shown in FIGS. 1 and 2, a strap 50 is attached to an upper portion of the housing 12. The strap 50 is used to hold the mobile phone 10 without dropping it when a user passes his / her hand or finger. The strap 50 has a hole 51 for passing a hand or a finger, for example, and has a loop shape.

FIG. 3 shows an example of a sectional structure taken along line XX of the mobile phone 10 of FIG. FIG. 3 shows an internal structure of the housing 12 and an example of a cross-sectional shape of the strap 50.
The housing 12 is configured by combining the front part 24 and the rear part 26, and in the internal space 54 of the housing 12,
The circuit board 56 and the heat conductive members 60, 62, 68 are housed. The front portion 24 and the rear portion 26 are made of, for example, a metal material having excellent thermal conductivity, such as Cu or Al, in order to enhance thermal conductivity. The front part 24 and the rear part 26 can also be made of ceramics AlN or ABS (acrylonitrile butadiene styrene) resin as a heat conductive material other than metal.

As described above, the circuit board 56 and the heat conductive members 60 and 62 are accommodated in the internal space 54 of the housing 12. Various heating elements 66 are arranged on the circuit board 56. These heating elements 66 are, for example, CPU
(Central processing unit), transistors or other heating elements. The circuit board 56 has an electronic circuit for realizing various functions of the mobile phone 10, and is arranged in parallel with the longitudinal direction of the internal space 54 of the housing 12 and at the center in the example of FIG. I have.

A heat conduction member 60 is fixed in close contact with, for example, an adhesive or the like over the entire inner surface 24A of the front portion 24, preferably. Similarly, another heat conducting member 62 is fixed in close contact with, for example, an adhesive over the inner surface 26A of the rear portion 26 preferably over the entire surface. The heat conducting members 60 and 62 are thermally connected by another heat conducting member 68. The heat conduction member 68 is also provided in the housing 1.
2 and is fixed by an adhesive or the like in close contact with the inner surface thereof.

As described above, the heat conducting member 60 and the heat conducting member 6
2 is disposed in close contact with the inner surfaces 24A, 26A and the inner surface 29 of the housing 12, so that the heating element 66 as a heating element is formed.
Can be directly conducted to the front portion 24 and the rear portion 26 of the housing 12 via the heat conducting members 60 and 62. As a result, the heat of the heating element 66 is efficiently transferred to the housing 1.
2 can radiate heat to the outside. The strap 50 is mechanically connected to one end 70 of the housing 12. Strap 5
0 denotes an external heat conductive member 76 and the external heat conductive member 76
Is provided.

The above-described heat conducting members 60 and 62, the heat conducting member 68 and the external heat conducting member 76 are made of the same material and have excellent heat conductivity, and constitute a heat radiating portion 90. . The material of the heat conductive members 60, 62, 68 and the external heat conductive member 76 is, for example, Cu, Al or the like in the case of metal, and a silicon-based heat conductive sheet or a carbon-based heat conductive sheet is also used. be able to. Examples of the silicon-based heat conductive sheet include a mixture of silicon rubber and fine powder of AlN. Examples of the carbon-based heat conductive sheet include a graphite sheet, an expanded graphite sheet, and a solidified graphite sintered body.

The external heat conductive member 76 is formed in a loop shape, and the external heat conductive member 76 is entirely covered with a coating material 78. Two ends 80 of the external heat conducting member 76 fit into holes in the front portion 24 and the rear portion 26 of the housing 12, and the two ends 80 are thermally mechanically connected to the heat conducting member 68. It is connected to the. As a result, the heat of the heating element 66 in the housing 12 is transferred to the heat conducting members 60, 62,
The heat can be radiated not only to the outside through the casing 12 through the housing 68 but also to the outside from the strap 50 by the external heat conducting member 76. For this reason, the heat of the heating element 66 can be efficiently radiated by using a wider heat radiation area than in the related art.

As the material of the covering member 78, preferably, a laminated material such as a polymer can be adopted in order to protect the flexible and soft external heat conducting member 76 from water and dust. As this laminate material, PE (polyethylene), PP (polypropylene),
There is no particular limitation as long as it can be heat-sealed with a thermoplastic resin such as PET (polyethylene terephthalate) and PI (polyimide).

Next, another embodiment of the portable telephone 10 shown in FIG. 3 will be described with reference to FIGS. The difference between the mobile phone 10 of FIGS. 4 and 5 from the embodiment of FIG.
6 in that it can be removably attached to it.
A concave portion 24B is formed on the front portion 24 side of the housing 12, and a concave portion 26B is also formed on the rear portion 26. Insertion holes 24C and 24D are formed in the front portion 24 and the rear portion 26, respectively.
The strap 150 includes the external heat conductive member 176 and the covering material 7.
8 covers the external heat conductive member 176.

The strap 150 has a knob 110 which is an operation unit for attachment and detachment. Protrusions 112 and 114 are formed on the knob 110. Convex portions 112, 114
Can be detachably fitted into and held in the concave portions 24B and 26B of the housing 12, respectively. Thus, the convex portion 1
When 12, 114 are fitted into recesses 24B, 26B,
The end 180 of the external heat conducting member 176 is inserted into the insertion hole 24C, 2.
4D respectively. Therefore, as shown in FIG. 5, the external heat conducting members 176 are heat conducting members 60, 62, 68.
Can be connected both thermally and mechanically. Accordingly, the heat generated by each of the heat generating elements 66 is not only radiated to the outside from the housing 12 through the heat conductive members 60, 62, and 68 but also radiated from the strap 150 through the external heat conductive member 176. be able to. In addition, convex part 1
The knobs 12 and 114 can be removed from the recesses 24B and 26B by, for example, turning the knob 110 in the R direction in FIG.

FIGS. 6 and 7 show a portable telephone 1 according to the present invention.
0 shows still another embodiment. In this embodiment, the strap is not a loop but a straight strap 250. The structure of the housing 12 is the same as the internal structure of the housing 12 in FIG. Strap 250
Has an external heat conductive member 276 and a coating material 278. The coating material 278 covers the external heat conductive member 276. The strap 250 is fixed to the housing 12 side.

FIG. 7 shows still another embodiment, in which the strap 250 of FIG. 6 can be detachably and thermally and mechanically connected to the housing 12. Case 1
A concave portion 24B is formed in the front portion 24 of the second,
A concave portion 26B is formed in the rear portion 26. Case 12
Has an insertion hole 24E. On the other hand, the strap 250 has an external heat conducting member 276 and a covering material 278. The covering material 278 is integrated with the knob 210, and the knob 210 has convex portions 212 and 214.
These convex portions 212 and 214 are provided in the concave portions 24 of the housing 12.
B and 26B can be detachably fitted respectively. Thereby, the end 280 of the external heat conducting member 276 is formed.
Is inserted into the insertion hole 24E, so that the heat conducting member 60,
62 and 68 and the external heat conducting member 276 can be thermally and mechanically connected. As described above, by increasing the heat radiation area using the strap, for example, the temperature of the housing could be reduced from 55.5 ° C. to 42.5 ° C. The temperature of the housing when the heat conductive member is not arranged in the housing is 67.4 ° C, and the temperature of the housing when the heat conductive member is built in the housing is 55.5 ° C. When the external heat conductive member was provided on the strap, the temperature of the housing was lowered to 42.5 ° C.

Next, another embodiment of the electronic apparatus of the present invention will be described. 8 and 9, the electronic device is a video camera recorder. Video camera recorder 10
Reference numeral 10 denotes, for example, a digital video camera recorder, which has a main body housing 1012. The main body housing 1012 has a video cassette accommodating portion 1014. A video cassette can be removably loaded into the accommodation section 1014.

A lens barrel 1018 is accommodated in an upper portion 1016 of a main body housing 1012. Upper part 101
6 has a stereo microphone 1020 and a monitor device 1050
Is provided. This monitor device 1050 is the same as that shown in FIG.
By pointing the camera in a desired direction as shown in FIG. 2, it is possible to display, for example, a color image being photographed or a color image to be reproduced. A focus lens 1031 is arranged on the front side of the lens barrel 1018, and a color view finder 1032 is provided on the rear side of the lens barrel 1018. In addition, a battery pack 1034 is detachably attached to the side of the main body housing 1012.

The housing 1012 of the main body shown in FIGS.
For example, it is made of a metal with good heat dissipation. 1 and 2
Of the body of the video camera recorder 1010 shown in FIG.
12, a monitor device 1050 is mounted. This monitor device 1050 includes a liquid crystal display device 1052 and a housing 1100 as shown in FIG.

The monitor device 1050 shown in FIGS. 1 and 2 is opened from the housing 1012 of the main body, and when the user takes a picture using the video camera recorder 1010, the picture is taken by the liquid crystal display device 1052. Images can be displayed in color. The monitor device 1050 can be rotated in the X1 direction or the X2 direction in FIG. 2 by the support portion 1060 shown in FIG. When the monitor device 1050 is rotated in the X2 direction, the monitor device 1050 is housed in the housing portion 1012A of the main body housing 1012 as shown in FIG. 2 by rotating the monitor device 1050 of FIG.
When the monitor device 1050 is closed in two directions, the monitor device 1050 is placed in the accommodation portion 1012 such that the liquid crystal display device 1052 is on the outside.
A.

As shown in FIGS. 8 and 9, the video camera recorder 1010 has a hand strap 1150. This hand strap 1150 is
The video camera recorder 1010 can be held with one hand by inserting a finger of a hand by a user.

FIG. 10 shows an example of a sectional structure taken along line YY of the video camera recorder of FIG. Case 1012
Houses a circuit board 1056. The heating element 1066 is mounted on the circuit board 1056. Inside the housing 1012, the inner surface 120 of the housing 1012
0, preferably over a large area,
0 are closely attached and fixed by an adhesive or the like. Since the heat conductive member 1060 is in close contact with the housing 1012,
The heat of the heating element 1066 can be radiated to the outside through the heat conductive member 1060 and the housing 1012. The material of the housing 1012 and the material of the heat conductive member 1060 are the same as the material of the housing 12 and the material of the heat conductive members 60, 62, and 68 in FIG.

The hand strap 1150 has an external heat conducting member 1076 and a covering material 1078. Coating material 1
Reference numeral 078 covers the external heat conducting member 1076. One end 11 of external heat conducting member 1076 of strap 1050
10 and the other end 1114 are fitted into insertion holes 1300 and 1310 of the housing 1012, respectively. Thereby, one end 1110 and the other end 11 of the external heat conductive member 1076 are formed.
14 is thermally and mechanically connected to one end and the other end of the heat conducting member 1060, respectively. As a result, the heat of the heating element 1066 is transferred to the strap 1150 via the heat conductive member 1060 and the external heat conductive member 1076.
Can efficiently dissipate heat.

In the embodiment of FIG. 11, the connection ends 1154 and 115 of the strap 1150 of the embodiment of FIG.
Reference numeral 6 denotes a structure that can be detachably and thermally and mechanically connected to the housing 1012. The connection end 1154 is provided with a knob 1300, and the connection end 1156 is provided with a knob 1310. Convex part 1 of knob 1300
302 and 1304 can be detachably fitted and attached to the concave portion 1400 of the housing 1012. Similarly, knobs 1310 also have protrusions 1330 and 1332
Is provided. These projections 1330 and 1332
Can be detachably fitted and attached to the concave portion 1410 of the housing 1012. By adopting such a structure, the hand strap 1150 can
2 can be removed as needed.

In the embodiment of the present invention, the heat radiating area for radiating the heat generated by the heat generating element is obtained by adding the surface of the housing and the surface of the external heat conducting member which is also an external extension. The heat radiation effect increases, and the temperature of the housing can be reduced. The electronic device of the present invention is not limited to a digital video camera recorder and a mobile phone, but also includes portable music information such as a PHS (Personal Handy Horn System), a digital still camera, a PDA (Personal Digital Assistant), and a pendant type. It includes other types of devices such as playback devices. In addition to the external heat conductive member, in addition to the strap-shaped external member, stereo headphones connected from the outside,
Of course, it may be provided in other accessory devices. The structure in which the external member such as the strap can be attached to and detached from the housing may be other than the illustrated example.

[0034]

As described above, according to the present invention,
The heat radiation efficiency can be further increased as compared with the case where heat is released through the housing.

[Brief description of the drawings]

FIG. 1 is a front view showing a mobile phone as an example of an electronic apparatus according to the invention.

FIG. 2 is a rear view of the mobile phone of FIG. 1;

FIG. 3 is a view showing an example of a cross-sectional structure taken along line XX of the mobile phone shown in FIG. 1;

FIG. 4 is a view showing another embodiment of the embodiment of FIG. 3, showing a state before the strap is attached to the housing.

FIG. 5 is a view showing a state in which the strap of FIG. 4 is attached to a housing.

FIG. 6 is a diagram showing another embodiment of the present invention.

FIG. 7 is a view showing a state before the strap is attached to the housing side in the embodiment of FIG. 6;

FIG. 8 is a perspective view showing a video camera recorder as an example of the electronic apparatus according to the invention.

FIG. 9 is a perspective view of the video camera seen from another angle.

FIG. 10 is a view showing an example of a cross-sectional structure taken along line YY of the video camera in FIG. 8;

FIG. 11 is a view showing an example in which the hand strap has a detachable structure in the embodiment of FIG. 10;

[Explanation of symbols]

10: mobile phone (electronic device), 12: housing, 5
0 ... strap, 56 ... circuit board, 60, 6
2, 68: heat conducting member, 66: heating element, 76
... External heat conductive member, 78 ... Coating material, 90 ...
Radiator

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masaki Orihashi 7-35, Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation (72) Inventor Munemitsu Abe 1-7 Yukitani Otsukacho, Ota-ku, Tokyo Alp (72) Inventor Eiji Shinohara 1-7 Yukitani Otsuka-cho, Ota-ku, Tokyo Alps Electric Co., Ltd. F-term (reference) 4E360 AA02 AB12 AB42 AD02 AD03 AD15 EA23 ED03 ED17 ED27 FA04 GA24 GB26 5E322 AA03 AA11 AB06 AB07 AB11 FA04 FA05

Claims (7)

[Claims] 1. An electronic device having a heat radiating portion for radiating heat in a housing to the outside, wherein the heat radiating portion is a heat conductive member disposed in close contact with the housing, and is thermally connected to the heat conductive member. And an external heat conductive member connected to the housing and located outside the housing. 2. The electronic device according to claim 1, wherein the external heat conducting member is covered by a covering member. 3. The electronic device according to claim 1, wherein the heat conduction member and the external heat conduction member are made of metal. 4. The electronic device according to claim 1, wherein the heat conductive member and the external heat conductive member are silicon-based heat conductive sheets. 5. The electronic device according to claim 1, wherein the heat conductive member and the external heat conductive member are carbon-based heat conductive sheets. 6. The electronic device according to claim 1, wherein the heat conductive member is in close contact with a heating element of a circuit board disposed in the housing. 7. The electronic device according to claim 1, wherein the external heat conductive member is detachably fixed to the housing.