Abstract: According to one embodiment, an electronic device includes: a main body; a switch; and a movement support portion. A component is detachably installed in a component installation portion of the main body. The switch includes a base and a movable portion. The switch becomes an ON state when the movable portion is moved relatively closer to the base. The movement support portion supports the switch so as to permit reciprocal movement of the switch along a direction in which the movable portion is moved closer to the base, and is moved to one of directions of the reciprocal movement by a predetermined ON operation. While the component is installed in the component installation portion, the switch becomes the ON state when the switch is sandwiched between the component and the movement support portion, and when the movable portion is moved relatively closer to the base.

Abstract: According to one embodiment, an electronic device includes: a main body; a switch; and a movement support portion. A component is detachably installed in a component installation portion of the main body. The switch includes a base and a movable portion. The switch becomes an ON state when the movable portion is moved relatively closer to the base. The movement support portion supports the switch so as to permit reciprocal movement of the switch along a direction in which the movable portion is moved closer to the base, and is moved to one of directions of the reciprocal movement by a predetermined ON operation. While the component is installed in the component installation portion, the switch becomes the ON state when the switch is sandwiched between the component and the movement support portion, and when the movable portion is moved relatively closer to the base.

Abstract: According to one embodiment, a fuel cell device includes a main body, an electricity generator, a fuel cartridge, an air inlet, an air intake filter, and a vibration applying mechanism. The electricity generator is housed in the main body, and generates electricity. The fuel cartridge is detachably housed in the main body, and supplies the electricity generator with fuel for electricity generation. The air inlet draws air in from atmosphere to supply the electricity generator with the air. The air intake filter covers the air inlet and cleans air. The vibration applying mechanism causes the air intake filter to vibrate in response to the movement of the fuel cartridge with respect to the main body.

Abstract: According to one embodiment, a fuel cell device includes a main body, an electricity generator, a fuel cartridge, an air inlet, an air intake filter, and a vibration applying mechanism. The electricity generator is housed in the main body, and generates electricity. The fuel cartridge is detachably housed in the main body, and supplies the electricity generator with fuel for electricity generation. The air inlet draws air in from atmosphere to supply the electricity generator with the air. The air intake filter covers the air inlet and cleans air. The vibration applying mechanism causes the air intake filter to vibrate in response to the movement of the fuel cartridge with respect to the main body.

Abstract: According to one embodiment, in a method of controlling a valve, a valve body is moved by a first distance toward an open position at a start of the operation, the first distance being longer than a distance corresponding to maximal compression of a sealing member, and then, moved in a closing direction as far as a fully closed position where the sealing member is depressed by the valve body to be maximally compressed, and setting the fully closed position as an initialized position. The valve body is moved with the initialized position as a reference, to a normal closed position by a second distance in the opening direction, the second distance being shorter than the distance corresponding to maximal compression, or to a normal open position by a third distance in the opening direction to open the passage, the third distance being longer than the first distance.

Abstract: According to one embodiment, a fuel cell unit is provided with a housing, a circulation section which is housed in the housing and in which a fluid is circulated, and a valve which is provided for the circulation section and releases a pressure more than predetermined value produced in the circulation section.

Abstract: A fuel cell unit includes a mixing tank for producing a fuel/water solution, a fuel cartridge for storing fuel, an EEPROM for storing fuel feed volume information for feeding the fuel to the mixing tank, a fuel supply pump for feeding the fuel from the fuel cartridge to the mixing tank, and temperature sensors/fluid volume sensors/voltage monitors of respective portions connected to the fuel supply pump and for measuring the rotational frequency of the fuel supply pump until the fuel is used up. Fuel feed volume information is calculated newly based on a counted rotational frequency obtained from the measuring result, and the residual quantity of the fuel is calculated from the new fuel feed volume information. The new fuel feed volume information is stored in the EEPROM so as to replace and update the old fuel feed volume information.

Abstract: An optical pickup device moving objective caused to face disk medium, in tracking direction with respect to disk medium, optical pickup device includes holder holding objective, clamping member clamping holder in such a manner that holder can be moved freely in the tracking direction, support member supporting clamping member, base section to which the support member is fixed, magnetic member being fixed to base section via yoke section moveable in the tracking direction, electromagnet being held by holder and is provided in a space between magnetic member and yoke section and which moves objective in the tracking direction by electromagnetic forces produced between electromagnet and magnetic member according to the amount of electricity, and travel distance limiting member being fixed to magnetic member and limits the travel distance of holder in the tracking direction.