Portable electronic apparatus having a removable keyboard secured to a housing by screws protruding through the bottom wall of the housing

A portable electronic apparatus comprising:

• a housing including a bottom case having a bottom wall, a front portion and a rear portion, and an upper case covering the rear portion of the bottom case and having a front end portion proximate to the front portion of the bottom case;
• a printed circuit board disposed in the front portion of the bottom case;
• a keyboard unit removably mounted on the housing to cover the front portion of the bottom case, the keyboard unit comprising:
• a substantially planar keyboard body having a top face, an under side, and a plurality of connecting portions protruding from the under side of the keyboard body;
• a plurality of keys disposed on substantially the entire top face of the keyboard body;
• and
• a rectangular keyboard frame fitted on the peripheral edge of the keyboard body, the keyboard frame being removably fitted to the front portion of the bottom case and having a projection removably engaging the front end portion of the upper case, the keyboard frame being removable from the bottom case independently of the upper case;
• and
• a plurality of screws removably fixing the keyboard unit to the housing, the screws being screwed into the connecting portions through the bottom wall of the bottom case.

A portable electronic apparatus comprising:

• a housing including a bottom case having a bottom wall, a front portion and a rear portion, and an upper case covering the rear portion of the bottom case;
• a printed circuit board disposed in the front portion of the bottom case;
• a keyboard unit removably mounted on the housing to cover the front portion of the bottom case, the keyboard unit comprising:
• a substantially planar keyboard body having a top face, an under side and a fixing portion including a plurality of projections protruding from the under side of the keyboard body;
• a film member disposed on the under side of the keyboard body and having a circuit pattern thereon;
• a shielding plate fixed to the under side of the keyboard body, the film member being between the underside of the keyboard body and the shielding plate, the shielding plate shielding the printed circuit board from electromagnetic noise produced by the keyboard unit, the projections protruding through the film member and the shielding plate;
• a plurality of keys disposed on substantially the entire top face of the keyboard body;
• and
• a rectangular keyboard frame fitted on the peripheral edge of the keyboard body, the keyboard frame being removably fitted to the front portion of the bottom case and being removable from the bottom case independently of the upper case;
• and
• means for securing the fixing portion to the housing, the securing means including a plurality of screws screwed into the projections through the bottom wall of the bottom case.

A portable computer comprising:

• a housing including a bottom case having a bottom wall, a front portion and a rear portion, and an upper case covering the rear portion of the bottom case;
• a keyboard unit removably mounted on the housing to cover the front portion of the bottom case, the keyboard unit comprising:
• a plate having an upper face, an under face, and a plurality of fixing portions protruding from the under face of the plate;
• a plurality of keys disposed on substantially the entire upper face of the plate;
• and
• a frame fitted about a peripheral edge of the plate, the frame being removably fitted to the front portion of the bottom case and being removable from the bottom case independently of the upper case;
• and
• a plurality of screws removably fixing the keyboard unit to the housing, the screws being screwed into the fixing portions through the bottom wall of the bottom case.

A portable electronic apparatus comprising:

• a housing including a bottom case having a bottom wall, a front portion and rear portion, and an upper case covering the rear portion of the bottom case;
• a printed circuit board disposed in the front portion of the housing;
• a keyboard unit removably mounted on the housing to cover the front portion of the bottom case, the keyboard unit including a top face, an under side, a fixing portion having a plurality of projections protruding from the under side, and a plurality of keys disposed on substantially the entire top face;
• and
• means for securing the fixing portion to the housing, the securing means including a plurality of screws screwed into the projections through the bottom wall.