Abstract: An antenna unit is provided in a wireless communication apparatus which performs wireless communication. The antenna unit has a radio wave resonance part through which a radio wave is transmitted or received, an antenna ground part electrically connected to the radio wave resonance part, and a connection part which fixes the antenna ground part at such a position that the antenna ground part is closer to the radio wave resonance part than other ground parts of the wireless communication apparatus.

Abstract: A connector is capable of selectively connecting different types of cards. The connector has a first connector portion having a first contact for connection to a first card, and a second connector portion having a second contact for connection to a second card. The first contact and the first card are connected together in a fitting/removal direction, while, the second contact and the second card are connected together in a direction crossing the fitting/removal direction. When the first contact and the first card are connected together, the second contact is prevented from contacting the first card. When the second contact and the second card are connected together, the first contact is prevented from contacting the second card.

Abstract: An impact resistant portable personal computer apparatus having feet which support the personal computer, a protruding member protruding downwardly from a foot, an impact sensor in the personal computer and responsive to an impact on the member for providing an output, and an element responsive to the output for aborting an operation of the personal computer. The apparatus is responsive to a fall in which the personal computer pivots about the back feet and impact is transmitted through the front feet.

Abstract: A connector is capable of selectively connecting different types of cards. The connector has a first connector portion having a first contact for connection to a first card, and a second connector portion having a second contact for connection to a second card. The first contact and the first card are connected together in a fitting/removal direction, while, the second contact and the second card are connected together in a direction crossing the fitting/removal direction. When the first contact and the first card are connected together, the second contact is prevented from contacting the first card. When the second contact and the second card are connected together, the first contact is prevented from contacting the second card.

Abstract: An antenna unit is provided in a wireless communication apparatus which performs wireless communication. The antenna unit has a radio wave resonance part through which a radio wave is transmitted or received, an antenna ground part electrically connected to the radio wave resonance part, and a connection part which fixes the antenna ground part at such a position that the antenna ground part is closer to the radio wave resonance part than other ground parts of the wireless communication apparatus.

Abstract: An antenna unit is provided in a wireless communication apparatus which performs wireless communication. The antenna unit has a radio wave resonance part through which a radio wave is transmitted or received, an antenna ground part electrically connected to the radio wave resonance part, and a connection part which fixes the antenna ground part at such a position that the antenna ground part is closer to the radio wave resonance part than other ground parts of the wireless communication apparatus.

Abstract: An impact-resistant apparatus includes support members for supporting the apparatus on a surface, an impact sensor for sensing an impact, and means for aborting a predetermined operation based on an output from the impact sensor. In this apparatus, a protruding member protruding downward from a plane in contact with lower ends of the respective support members is provided at a position wherein impact from the protruding member caused by a fall of the apparatus is transmitted to the impact sensor so that the predetermined operation is aborted effectively.

Abstract: An antenna unit is provided in a wireless communication apparatus which performs wireless communication. The antenna unit has a radio wave resonance part through which a radio wave is transmitted or received, an antenna ground part electrically connected to the radio wave resonance part, and a connection part which fixes the antenna ground part at such a position that the antenna ground part is closer to the radio wave resonance part than other ground parts of the wireless communication apparatus.

Abstract: Described is a security mechanism effective in various combinations of a notebook PC and various extend units. An extend unit includes a security slot for attaching a cable lock, a security select which has a plurality of select positions and the select position of which is fixed when the cable lock is attached to the security slot. A linking unit is included for interlocking with the security select switch, disabling a release switch to be operated with fixing the release switch of a subsystem holding bay when the security select switch is positioned at a first select position, disabling the release switch and an eject switch, separating the notebook PC from the extend unit, to be operated when the security select switch is positioned at a second select position, and enabling the release switch and eject switch to be operated without fixing the release switch and eject switch when the security select switch is positioned at a third select position.

Abstract: A ventilation fan for a PC has a plurality of blades disposed around a rotary hub. Each blade is shaped differently from the others to an extent that the air volume handling capacity of the blades is not substantially diminished. The noise level generated by a fan in a specific frequency range is caused by the change in air pressure and is attributable to the symmetry of the fan blade shapes. By altering the shape of the individual blades, the noise level due to pressure change is attenuated. Each blade slightly differs in shape from the others to eliminate air pressure changes. The noise level of the fan is suppressed within an allowable range even when the number of blades and the rotational speed of the fan are increased for better air flow. Preferably, the shape of each blade is varied from the others by putting an adhesive such as putty on the front surface and/or the back surface thereof near the hub.

Abstract: A battery attaching mechanism for a portable computer by which an accommodated battery can be safely stored and secured, yet easily removed. The battery attaching mechanism comprises a recessed battery compartment provided on the body of the portable electronic apparatus, a latching member for latching the battery pack, said latching member being provided on a side wall of said battery compartment and having an outer latching member surface, a locking member for inhibiting said latching member from being released by contact with said outer latching member surface of said latching member, a connector for receiving a connector of said battery pack, and a removal assisting section for, in the vicinity of said connector, pushing said accommodated battery pack away from said connector.

Abstract: A portable information processing apparatus of the type which includes a main body, a keyboard unit that mounted on the top surface of the main body, and a lid pivotally attached to the rear end of the main body, wherein the improvement comprises: (a) a keyboard base of the keyboard unit for covering the top surface of the main body; (b) a keyboard portion of the keyboard unit which is attached to the front end of, and which is rotatable in a first direction; and (c) a lever of the keyboard unit, which is attached to the rear end of the keyboard base, and which is rotatable in a second direction opposite to the first direction, for holding the keyboard portion at a still position whereat the keyboard portion is tilted at a predetermined angle.

Abstract: An installation/removal structure for use with a generally rectangular peripheral device which may be temporarily installed within a portable data processing system. An engagement structure is provided within an interior portion of the portable data processing system and an electrical connector is mounted proximate to the engagement structure within the portable data processing system. An elongate flexible wire bail is swingably mounted across one end of the peripheral device, such that the elongate flexible wire bail can be engaged with the engagement structure by swinging the bail to a first position such that the peripheral device is held in electrical engagement with the electrical connector and when swung to a second position disengages from the engagement structure and may be utilized to remove the peripheral device from the portable data processing system.

Abstract: A drawer (70) and antenna (e.g., 78) can be extended from a computer for wireless communications, and retracted when not in use. The antenna and its circuit board (56) are slidably attached to the drawer, which is slidably attached to an antenna housing (30) located within the computer. A door (74) is pivotally attached to a bottom plate (60) of the drawer to cover a slot (40) in the side of the computer. For wireless communications, the antenna, circuit board and drawer are extended through the slot and project out the side of the computer. The bottom plate, door and a cover over the circuit board function as a ground plane for the antenna. The effective dimensions of the ground plane can be varied by sliding the circuit board relative to the drawer.

Abstract: An information processing apparatus in which arbitrary removal of a device for processing information accommodated within an opening within the main body can be prevented, regardless of operation of an eject button or the like, and to provide an information processing apparatus in which such prevention can be realized in a simple structure and at a low cost. A removal preventing latch is provided and inserted into an aperture within the main body of the information processing apparatus and through a corresponding aperture within the device for processing information. A cover for the main body may then be selectively locked in a closed position, preventing removal of the removal preventing latch while the cover is closed. A keyboard is preferably mounted to the cover for the main body.

Abstract: An information processing apparatus is provided which includes a hard disk drive which is adapted to be accommodated within a main body of the information processing apparatus. The hard disk drive includes a movable member attached thereto. When the movable member slides into a first state, a portion of the movable member protrudes outside the main body of the information processing apparatus. A hinged keyboard is provided for covering the interior of the main body of the information processing apparatus and when the portion of the movable member protrudes outside the main body, the hinged keyboard is locked in a closed state. Additionally, a preventing latch is provided which may be utilized in conjunction with a card port in order to engage a PCMCIA card and prevent removal thereof. The preventing member is mounted under the keyboard such that when the keyboard is in a closed state, the PCMCIA card cannot be removed.