Abstract: A portable electronic device includes a casing, a circuit board module, a display module and a fastening unit. The casing has spaced-apart horizontal top and bottom walls, each of which has parallel front and rear edges and parallel lateral edges, and a vertical surrounding wall interconnecting the front edges and the lateral edges of the top and bottom walls. The top and bottom walls and the surrounding wall cooperatively confine a receiving space with a rear opening formed between the rear edges of the top and bottom walls. The circuit board module includes a main circuit board with front and rear edges, and a mounting frame mounted on the rear edge of the main circuit board. The main circuit board is inserted into the receiving space in the casing via the rear opening such that the mounting frame is disposed to close the rear opening.

Abstract: A portable electronic device includes a casing, a circuit board module, a display module and a fastening unit. The casing has spaced-apart horizontal top and bottom walls, each of which has parallel front and rear edges and parallel lateral edges, and a vertical surrounding wall interconnecting the front edges and the lateral edges of the top and bottom walls. The top and bottom walls and the surrounding wall cooperatively confine a receiving space with a rear opening formed between the rear edges of the top and bottom walls. The circuit board module includes a main circuit board with front and rear edges, and a mounting frame mounted on the rear edge of the main circuit board. The main circuit board is inserted into the receiving space in the casing via the rear opening such that the mounting frame is disposed to close the rear opening.

Abstract: An electronic device includes a connector-mounting side wall, a main circuit board and a heat-dissipating unit. The connector-mounting side wall is formed with a set of connector-mounting holes adapted to be mounted with electrical connectors, and a vent hole. The main circuit board has one edge disposed adjacent to the connector-mounting side wall, and is provided with a heat-generating electronic component. The heat-dissipating unit includes a heat sink, a heat-conducting plate and a heat-exchanger pipe. The heat sink is mounted on the connector-mounting side wall adjacent to the vent hole. The heat-conducting plate is disposed on the main circuit board so as to contact a heat-dissipating side of the electronic component. The heat-exchanger pipe has a first end connected to the heat-conducting plate, and a second end opposite to the first end and mounted on the heat sink for transmitting heat from the heat-conducting plate to the heat sink.