Abstract: An electronic apparatus is provided with a base unit and a display unit. The base unit has an opening formed on the upper surface. The display unit incorporates a display device and supported by the base unit. The display unit is rotatable between a first position where it is tilted down in such a manner as to cover the upper surface of the base unit and a second position where it is raised in such a manner as to expose the upper surface. The display unit includes a projection portion which is inserted into the opening when the display unit is rotated to the first position. A switch for turning the display device on or off is arranged inside the base unit. The switch includes an operation element opposed to the opening of the base unit. When the display unit is rotated to the first position, the operation element is pushed by the projection portion, thereby turning off the display device.

Abstract: A display device comprises a box-shaped casing having an opening for display, and a display unit contained in the casing, the display unit having a display screen exposed to the opening. The casing includes a display cover and a display mask coupled to the display cover and having the opening. The display cover and display mask have outer peripheral edge portions, respectively, which are detachably coupled to each other. The display unit is provided with a plurality of support portions extending toward the outer peripheral edge portions. The support portions is clamped between the outer peripheral edge portion of the display cover and the outer peripheral edge portion of the display mask, whereby the display unit is fixed in the casing.

Abstract: A portable computer has a base unit, a first printed circuit board and a second circuit board. The base unit has a bottom wall and a connector panel which extends upward from a bottom wall. The first printed circuit board is mounted on the bottom wall, and has a first stacking connector. A second stacking connector is connected to the first stacking connector. a reinforcing plate is disposed on an upper surface of the second stacking connector. A bracket is arranged from the connector panel to the upper surface of the second stacking connector. The second circuit board is mounted on an upper surface of the bracket, and disposed above the first printed circuit board. A flexible wiring board is electrically connected to the second stacking connector and the second printed circuit board. The second printed circuit board is electrically connected to the first printed circuit board via the first and second stacking connector and the flexible wiring board.

Abstract: A portable apparatus comprises a housing including a pack receptacle having an insertion port. The pack receptacle has a first connector facing to the insertion port. A circuit board is contained in the housing. The circuit board is positioned between the pack receptacle and a bottom wall of the housing. The pack receptacle contains a pack device to be detachable through the insertion port. The pack device has a second connector to be detachably connected to the first connector. The pack receptacle has an ejector for ejecting the pack device. The ejector has a pressing member for pressing the pack device in a direction away from the first connector and an operation member, positioned at the upper portion of the circuit board to be linked with the pressing member. The operation member has a lever section along the peripheral wall of the housing.

Abstract: A portable apparatus comprises a housing having an opening portion, a pack receptacle formed in the housing, and a battery pack detachably contained in the pack receptacle through the opening portion. The pack receptacle has a slider for maintaining the battery pack at the pack receptacle. The slider is movable between a lock position and a lock releasing position, and maintained at the lock position through a spring. The slider has an insertion port, an engaging portion, a first cam portion, and a second cam portion. The insertion port is formed such that a convex portion of the battery pack is detachably inserted therethrough to be continuous to the opening portion. The engaging portion is formed to be engaged with the convex portion when the slider is moved to the lock position.

Abstract: A portable computer has a base unit, a first printed circuit board and a second circuit board. The base unit has a bottom wall and a connector panel which extends upward from a bottom wall. The first printed circuit board is mounted on the bottom wall, and has a first stacking connector. A second stacking connector is connected to the first stacking connector. A reinforcing plate is disposed on an upper surface of the second stacking connector. A bracket is arranged from the connector panel to the upper surface of the second stacking connector. The second circuit board is mounted on an upper surface of the bracket, and disposed above the first printed circuit board. A flexible wiring board is electrically connected to the second stacking connector and the second printed circuit board. The second printed circuit board is electrically connected to the first printed circuit board via the first and second stacking connector and the flexible wiring board.

Abstract: The case includes a peripheral wall having a connector port and a storing portion arranged therein. A connector is located in the case. The connector opposes the connector port. A connector cover is supported by the case. The connector cover is movable among a closed position where the connector is covered, an open position where the connector is exposed to the outside of the case and a storing position in the storing portion where the connector cover is housed.

Abstract: A circuit module comprises a circuit board and a circuit element mounted on the circuit board and producing heat in operation. A heat conduction member, put in contact with the circuit element, for receiving the heat of the circuit element is attached to the circuit board. A metallic heat sink is detachably mounted on the heat conduction member. The heat sink comprises a radiation panel put in contact with the heat conduction member and a fan support portion formed integral with the radiation panel. The fan support portion supports a cooling fan for guiding a cooling air to the radiation panel.

Abstract: A portable computer of compact construction includes a base unit including a lower housing unit containing a PC board and an upper housing provided with an upwardly projecting hollow ridge extending across the rear upper edge of the upper housing. A panel, including an array of expansion connectors exposed through a rear opening in the lower housing unit and wired to the PC board, provides support for a holder of components, such as a speaker, LED indicators, etc., accommodated in the hollow ridge. Gaps in the hollow ridge are adapted for hinge-mounting an LCD, with LCD cabling passing through a channel in the hollow ridge en route to the PCB board.

Abstract: An electronic system includes an electronic apparatus body and an external expansion unit. The electronic apparatus body has a bottom surface and a rear surface. A first connector is arranged on the rear surface. The external expansion unit has a first surface opposing the bottom surface, and a second surface opposing the rear surface. The external expansion unit has a second connector which is detachably connected to the first connector. The external expansion unit has an engaging device. The engaging device is movable between the first position where the engaging device is separated from the bottom surface and the second position where the engaging device is engaged with the bottom surface to pull the electronic apparatus body toward the second surface. The external expansion unit has an operation mechanism for selectively moving the engaging device to the first and second positions.

Abstract: A portable information processing apparatus includes a housing storing electronic components. The housing includes first to third card storage portions having insertion ports open to one side surface of the housing, respectively, for card-like electronic components. A first cover is provided on the housing and rotatable between a closed position wherein the insertion port of the first card storage portion is closed by the first cover and an opened position wherein the insertion port of the first card storage portion open. A second cover is provided on the housing to be movable between a closed position wherein the first cover located in the closed position and the insertion ports of the second and third card storage portions are covered with the second cover and an opened position wherein the first cover and the insertion ports of the second and third card storage portions are exposed.

Abstract: An electronic apparatus includes a body including a storing portion and an engagement portion. A detachable unit is detachably stored in the storing portion. A unit holder holds the detachable unit in the storing portion, the unit holder being slidably connected to the detachable unit and including an engaging member movable between an engaging position and a release position. In the engaging position, the engaging member engages the engagement portion to hold the detachable unit in the storing portion. In the release position, the engaging member is disengaged from the engagement portion. An insertion opening may be provided in the storing portion of the body through which the detachable unit is detachably stored, and a cover may be provided to cover the insertion opening when the detachable unit is stored in the storing portion.

Abstract: A portable computer includes a body having a storing portion for storing a hard disk drive pack. The storing portion has an insertion opening which is open to the outside of the body. A hard disk drive holder is detachably connected to the hard disk drive pack. The holder includes a holder main body detachably fitted in the insertion portion. A pair of retaining members are provided on the holder main body and movable between an engaging position in which the retaining members engage engagement portions of the body to hold the holder main body in the insertion opening, and a retreat position in which the members are disengaged from the engagement portions to allow the holder main body to be detached from the insertion opening. A cover plate is detachably fitted in the insertion opening and includes lock pins which engage the retaining members to lock the members in the engagement position.

Abstract: A portable computer includes a housing and a display unit. The display unit is attached to the housing to be movable between a closed position and an opened position. The portable unit may also include a keyboard which can be covered by the display when the display is in the closed position. A circuit board is proximate to the bottom wall of the housing. A shield plate for magnetically shielding the circuit board is disposed inside the housing proximate to the circuit board and can be between the circuit board and the keyboard if a keyboard is provided. At least one supporting member extends from the bottom face of the shielding plate and abuts the circuit board to prevent the keyboard unit, if one is provided, from bending toward the circuit board. The shield plate may include an edge which is supported on the housing. The portable computer may also include bosses positioned between the bottom wall of the housing and the circuit board.

Abstract: A portable computer includes a housing and a keyboard unit mounted on the housing. A display unit is mounted on the housing to be movable between a closed position wherein the keyboard unit is covered by the display unit and a desired opened position wherein the keyboard is exposed. A latch mechanism for locking the display unit in the closed position is provided at the display unit. The mechanism includes a pair of latch hooks rockable between a latch position wherein each hook engages the housing and a release position wherein each hook is disengaged form the housing, and an interlocking member movable in interlock with the movement of the latch hooks. When a dial key attached to the display unit is turned on, the movement of the interlocking member is restricted by the key and the hooks are locked in the latch position.

Abstract: An expansion device which includes a device body which has first and second side surfaces and a bottom surface continuous with the first and second side surfaces. A power cord of the device leads out from the first side surface, and a plug is provided at an extended end of the power cord. The plug is adapted to be connected to a power socket of the electronic apparatus. The device body includes a guide groove formed in the bottom surface, in which part of the power cord is removably fitted. The guide groove includes a first portion having one end open to the first side surface and the other end in the bottom surface, a second portion extending from the other end of the first portion to the first side surface, and a third portion extending from the other end of the first portion to the second side surface.

Abstract: A portable computer includes a body having a storing portion for storing a hard disk drive pack. The storing portion has an insertion opening which is open to the outside of the body. A hard disk drive holder is detachably connected to the hard disk drive pack. The holder includes a holder main body detachably fitted in the insertion portion. A pair of retaining members are provided on the holder main body and movable between an engaging position in which the retaining members engage engagement portions of the body to hold the holder main body in the insertion opening, and a retreat position in which the members are disengaged from the engagement portions to allow the holder main body to be detached from the insertion opening. A cover plate is detachably fitted in the insertion opening and includes lock pins which engage the retaining members to lock the members in the engagement position. An interlock is coupled between the pair of retaining members.

Abstract: A portable computer includes a housing and a keyboard unit mounted on the housing. A display unit is mounted on the housing to be movable between a closed position wherein the keyboard unit is covered by the display unit and a desired opened position wherein the keyboard is exposed. A latch mechanism for locking the display unit in the closed position is provided at the display unit. The mechanism includes a pair of latch hooks rockable between a latch position wherein each hook engages a latch hole of the housing and a release position wherein each hook is disengaged form the housing, and an interlocking member, movable together with the latch hooks. A sliding member is slidably attached to each latch hook so as to be movable between a restricted position, wherein the sliding member is situated in the latch hole to restrict disengagement of the hook, and a retracted position, wherein the sliding member is retracted from the latch hole.

Abstract: A portable computer includes a housing and a keyboard unit mounted on the housing. A display unit is mounted on the housing to be movable between a closed position wherein the keyboard unit is covered by the display unit and a desired opened position wherein the keyboard is exposed. A latch mechanism for locking the display unit in the closed position is provided at the display unit. The mechanism includes a pair of latch hooks rockable between a latch position wherein each hook engages the housing and a release position wherein each hook is disengaged form the housing, and an interlocking member movable in interlock with the movement of the latch hooks. When a dial key attached to the display unit is turned on, the movement of the interlocking member is restricted by the key and the hooks are locked in the latch position.

Abstract: An expansion device includes a box-like device body and a second battery pack. The body includes a hard disc drive therein, a fitting recess open to the outer surface of the body, power-receiving terminals provided in the fitting recess and connected to the hard disc drive, and a second connector adapted to be connected to a first connector of a personal computer. The second battery pack is designed to be removably mounted in a battery mount portion, in place of a battery pack of the computer, and includes a coupling portion removably fitted in the fitting portion, and first and second power-supply terminals. When the second battery pack is mounted in the mount portion while the coupling portion is fitted in the fitting recess, the device body is coupled to the computer in a state where the second connector is connected to the first connector and the first and second power-supply terminals contact power-receiving terminals of the computer and the power-receiving terminals of the device body.