ELECTRONIC APPARATUS

• US 20080158817A1
• Filed: 03/05/2008
• Published: 07/03/2008
• Est. Priority Date: 09/06/2005
• Status: Abandoned Application

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: SUZUKI, Masumi, TSUNODA, Yosuke, AOKI, Michimasa
• Application Number:
  US12/042,882
• Publication Number:
  US 20080158817A1
• Time in Patent Office: Days
• US Class Current: 361/697
• CPC Class Codes: G06F 1/203 for portable computers, e.g. for laptops
• CPC Class Codes: H04M 1/0202 Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets constructional features of telephone transmitters or receivers, e.g. of speakers or microphones H04M1/03
• CPC Class Codes: H05K 7/20445 the coupling element being an additional piece, e.g. thermal standoff

Abstract

An electronic apparatus 100 includes a heat-generating element 1, a heat-radiating plate 4 which is used in heat radiation of the heat-generating element, and a housing 10 which accommodates the heat-generating element and the heat-radiating plate. The heat-radiating plate is disposed between the heat-generating element and a first wall portion 10a of the housing, and a support stage 5 for forming an air layer is disposed between the heat-radiating plate and the first wall portion. Since the heat-insulating effect of the air layer prevents the heat diffused from the heat-radiating plate from being easily conducted to the first wall portion, the formation of a heat spot in the first wall portion can be avoided even when the heat-generating element which generates a large amount of heat is used.

Claims

1. An electronic apparatus comprising:

a heat-generating element;

a heat-radiating plate which is used in heat radiation of the heat-generating element; and

a housing which accommodates the heat-generating element and the heat-radiating plate,

wherein the heat-radiating plate is disposed between the heat-generating element and a first wall portion of the housing,

the electronic apparatus further comprising a support stage for forming an air layer between the heat-radiating plate and the first wall portion.

2. The electronic apparatus according to claim 1, further comprising a heat-insulating member placed closer to the first wall portion than the heat-radiating plate, wherein the air layer is formed between the heat-insulating member and the first wall portion.

3. The electronic apparatus according to claim 2, wherein the air layer has a thickness of at least half of a thickness of the heat-insulating member.

4. The electronic apparatus according to claim 1, wherein the air layer is opened to space other than the air layer in the housing.

5. The electronic apparatus according to claim 1, wherein a portion of the heat-radiating plate, which is in contact with the heat-generating element, is protruded toward the heat-generating element from a remaining portion of the heat-radiating plate.

6. The electronic apparatus according to claim 5, further comprising an electronic component different from the heat-generating element and disposed between the remaining portion and a substrate on which the heat-generating element is mounted.

7. The electronic apparatus according to claim 5, wherein the heat-radiating plate has elasticity and the portion thereof protruded toward the heat-generating element is in press contact with the heat-generating element by elastic force.

8. The electronic apparatus according to claim 1, wherein the support stage is formed of a fibrous material, a foam material, or a stacked material including a heat-insulating member therein.

9. The electronic apparatus according to claim 1, wherein the support stage is disposed outside an area where the heat-generating element is placed when viewed from a direction in which the heat-generating element and the heat-radiating plate are disposed one on another.

10. The electronic apparatus according to claim 1, wherein the support stage has elasticity and brings the heat-radiating plate into press contact with the heat-generating element by elastic force.

11. The electronic apparatus according to claim 1, further comprising a heat spreader having a size larger than that of the heat-generating element and placed between the heat-generating element and the heat-radiating plate.

12. The electronic apparatus according to claim 1, wherein the heat-radiating plate is a substrate on which the heat-generating element is mounted.

13. The electronic apparatus according to claim 1, further comprising an operation member operated by a user and placed in the first wall portion.