摘要:
A cooling structure for LSI or the like devices to be mounted in a small size electronic apparatus housing. A main printed circuit board has mounted thereon first electronic devices with low heat generation; at least one auxiliary printed circuit board has mounted thereon a second electronic device with high heat generation, which is connected with one edge of the main printed circuit board (1) through a flexible printed circuit tape (5); a holder (6) fixed on the main printed circuit board (1) for resiliently supporting the auxiliary printed circuit board (2) at a distance above the former when the latter is turned over and is above the main printed circuit board (1) by bending the flexible printed circuit tape (5) so that a heat conductive surface of the second electronic device (4) is exposed outside. This printed circuit board assembly (A) is accommodated in a housing (B) made of a heat conductive material so that the heat conductive surface of the second electronic device (4) is brought into close and resilient contact with the inner wall (14) of the hosing (B).
摘要:
An electronic device having an exhaust opening configured to exhaust air outside, the electronic device includes a door part configured to close the exhaust opening when the electronic device has a predetermined temperature, wherein the door part is rotated based on the own weight of the door part and a wind pressure of the air taken in the electronic device and exhausted outside the electronic device, so that the exhaust opening is closed.
摘要:
A plug-in unit-mounting structure which makes it possible to efficiently mount plug-in units having different sizes in all slots. PIUs of printed board type which are different in size are mounted using respective mounting frames associated therewith. Box-shaped PIUs are also mounted using respective mounting frame associated therewith. However, no guide rail is provided on the metal shelf per se, for guiding each PIU for mounting the same therein.
摘要:
A heat radiating apparatus includes a radiator adhering to an electronic component mounted on a circuit board via an elastic member provided on the circuit board so that the electronic component is cooled. The radiator includes a plurality of projection parts, the elastic member includes an engaging part configured to engage the projection part and a radiator insert hole forming part where the radiator is inserted, and a pushing force is applied from the elastic member to the radiator by rotating the radiator so that the projection part is engaged by the engaging part, and thereby a bottom surface of the radiator is adhered to the electronic component.
摘要:
An optical unit includes photoelectric conversion modules, a plurality of adapter support members whose upper parts are rotatably supported, and a plurality of optical connector adapters attached to lower ends of the adapter support members so as to be arranged next to each other, the optical connector adapters being contained in the optical unit. The adapter support members are rotated separately so that the optical connector adapters are extracted outside from the optical unit with a space formed between each adjacent two of said optical connector adapters. Each of the optical connector adapters has insertion holes to which optical connectors of optical fibers extending from the photoelectric conversion modules and optical connectors of external optical fibers are connected.
摘要:
A case unit for housing printed-circuit assemblies includes a top plate made of metal, a bottom plate, made of metal, facing the top plate, side plates facing each other, the side plates being positioned between side portions of the top plate and the bottom plate so that a space surrounded by the top plate, the bottom plate and the side plates is formed, and guide rails, made of resin, integrated with the top plate and the bottom plate, the guide rails guiding the printed-circuit assemblies loaded into the space. Each of guide rails integrated with at least one of the top plate and the bottom plate has a guide rail body for guiding an edge of a printed-circuit assembly, the guide rail body being provided on an inner surface of a corresponding plate which is the top plate or the bottom plate, a flat member provided on an outer surface of the corresponding plate, and connecting portions occupying mounting holes formed through the corresponding plate, the connecting portions connecting the guide rail body and the flat member, so that the guide rail body is fixed on the corresponding plate by the connecting portions and the flat member.
摘要:
A case unit for housing printed-circuit assemblies includes a top plate made of metal, a bottom plate, made of metal, facing the top plate, side plates facing each other, the side plates being positioned between side portions of the top plate and the bottom plate so that a space surrounded by the top plate, the bottom plate and the side plates is formed, and guide rails, made of resin, integrated with the top plate and the bottom plate, the guide rails guiding the printed-circuit assemblies loaded into the space. Each of guide rails integrated with at least one of the top plate and the bottom plate has a guide rail body for guiding an edge of a printed-circuit assembly, the guide rail body being provided on an inner surface of a corresponding plate which is the top plate or the bottom plate, a flat member provided on an outer surface of the corresponding plate, and connecting portions occupying mounting holes formed through the corresponding plate, the connecting portions connecting the guide rail body and the flat member, so that the guide rail body is fixed on the corresponding plate by the connecting portions and the flat member.
摘要:
A display module includes: a display unit having a display screen for displaying information; a display unit housing including a transparent front cover covering a display screen of the display unit, and a pair of side covers covering both sides of the display unit, wherein the display unit is attached to the display unit housing so as to be detachable; and shafts projecting outwards from the pair of side covers and supported so as to be freely rotatable when fitted in a pair of supporting holes made in a housing provided for an apparatus.
摘要:
A rack comprises a plurality of lower guide rails arranged side by side to form the bottom thereof, and a plurality of upper guide rails arranged side by side to form the top thereo, for accommodating a plurality of electronic modules such as modems. Each of the modules includes a rectangular casing, lower and upper side edges of which are rounded or chamfered. The lower and upper guide rails are in vertical register with each other, respectively, and are vertically spaced from each other by a distance corresponding to a vertical height of the case. Each of the lower and upper guide rails has a pair of ridges coextended in parallel with each other and defining therebetween a guide path for complementarily and slidably receiving the corresponding side of the casing, whereby an outer width of the guide rails can be generally equal to a thickness of the casing due to the rounded or chamfered sides thereof. Also, a resilient detent element is provided in either of each lower guide rail or each upper guide rail to partially define an access opening formed therein for a person's finger to remove a module from the rack, and is engageable with the casing to lock the casing when it is accommodated in the rack. The detent element is resiliently deflected by putting a person's finger in the access opening, to thereby release a lock-engagement with the casing.
摘要:
A mechanism for insertion and withdrawal of a printed board unit (20) to and from a shelf (10), by which the printed board is inserted in the shelf with less force and locked therein after the completion of the operation, an the complete insertion can be confirmed by a click noise and a mark. The mechanism includes a lock arm (26), which is fixed to the printed board unit (20) at the base portion thereof and has a flexible tip, a lever (25) pivoted to the printed board unit (20) and provided with a cam surface (30) for driving the lock arm (26) for insertion and withdrawal of the printed board unit (20), and an aperture (17) formed on the shelf (10) and engageable with the lock arm (26) when the same is in a fixed position. The lever (25) occupies predetermined angular positions, both when the printed board unit (20) is completely engaged to a connector and when the printed board unit is withdrawn therefrom.