ELECTRONIC EQUIPMENT

• US 20100181108A1
• Filed: 10/08/2009
• Published: 07/22/2010
• Est. Priority Date: 08/28/2007
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: ASAI, Seiji, KUWAKI, Hiroshi, KIMURA, Yasushi, HATA, Koji, HAMAGISHI, Shinya
• Granted Patent: US 7,944,697 B2
• Time in Patent Office: Days
• US Class Current: 174/548
• CPC Class Codes: H05K 5/0213 Venting apertures; Constructional details thereof
• CPC Class Codes: H05K 5/0214 with means preventing penetration of rain water or dust semi-permeable membranes H05K5/0215, H05K5/0216

Abstract

Electronic equipment installed outdoors to house an internal unit is provided, meeting the waterproof standard and having an easily replaceable structure of the internal unit. The electronic equipment has an enclosure having a cover and a case with an opening and an air vent, and an internal unit in which an electronic component is mounted. The internal unit has a heat sink and radiation fins for releasing heat generated by the electronic component. The fins are inserted into the opening. The heat sink has a draining portion formed below the fins in a direction perpendicular to an extending direction of the radiation fins, a groove for waterproofing around the fins except an upper portion thereof, and two protrusions for fitting above the fins. The case has a rib for waterproofing around the opening except an upper portion thereof, and two holes for fitting above the opening.

Claims

1. Electronic equipment comprising:

an enclosure having a case with an opening formed therein and a cover; and

an internal unit in which an electronic component is mounted, having a heat sink for absorbing heat generated by the electronic component, a plurality of radiation fins formed in the heat sink to release the heat from the heat sink, and a draining portion formed below the radiation fins of the heat sink in a direction perpendicular to an extending direction of the radiation fins, the internal unit being mounted to the enclosure by inserting the radiation fins into the opening of the case of the enclosure,

wherein the case has a rib arranged in a horseshoe shape around the opening except an upper portion thereof, and

the heat sink has a groove formed around the radiation fins except an upper portion thereof so as to receive the rib.

2. The electronic equipment according to claim 1,

wherein the heat sink has a protrusion for fitting in an upper end surface of the heat sink, and

the case has holes into which the protrusions are inserted at a position corresponding to the protrusion of the heat sink and a mounting part for mounting a lower end surface of the heat sink.

3. The electronic equipment according to claim 1,

wherein both ends of the groove are formed to reach the upper end surface of the heat sink.

4. The electronic equipment according to claim 2,

wherein both ends of the groove are formed to reach the upper end surface of the heat sink.

5. The electronic equipment according to claim 1, wherein the groove and the rib are provided in plural numbers, respectively.

6. The electronic equipment according to claim 2, wherein the groove and the rib are provided in plural numbers, respectively.

7. The electronic equipment according to claim 3, wherein the groove and the rib are provided in plural numbers, respectively.

8. The electronic equipment according to claim 4, wherein the groove and the rib are provided in plural numbers, respectively.