A portable electronic apparatus having a detachable battery and an optional component for expanding a function

Claim 2

The portable electronic apparatus according to claim 1, characterized in that said base unit (2) has a front portion (5a) and a rear portion (5b), and said keyboard (7) is attached to said front portion (5a), and said first and second mounting recesses (60), (61) are formed on said rear portion (5b).

Claim 3

The portable electronic apparatus according to claim 2, characterized in that said first mounting recess (60) and said second mounting recess (61) are arranged in parallel to be adjacent to each other.

Claim 4

The portable electronic apparatus according to claim 3, characterized in that said rear portion (5b) of said base unit (2) has an upper surface (5c) and a rear surface (5d), which is continuous with said upper surface (5c), and said first and second mounting recesses (60), (61) are opened to said upper surface (5c) and said rear surface (5d).

Claim 5

The portable electronic apparatus according to claim 4, characterized in that said second battery (100) and said optional component (101) are formed to have the same size as each other, and have upper surfaces (102a), (110a) and rear surfaces (102b), (110b) constituting a part of the upper surface (5c) of said rear portion (5b) and a part of the rear surface (5d) of said rear portion (5b).

Claim 6

The portable electronic apparatus according to claim 4, characterized in that said first mounting recess (60) and said second mounting recess (61) are different from each other in the size.

Claim 7

The portable electronic apparatus according to claim 4, characterized in that said second mounting recess (61) has a bottom surface (61a) and a front surface (61c), which is continuous with said bottom surface (61a), a contact piece (92) to which said second battery (100) is electrically connected and a connector (88) to which said optional component (101) is electrically connected are formed in said front surface (61c), and said contact piece (92) and said connector (88) are formed to be shifted from each other.

Claim 8

The portable electronic apparatus according to claim 1, characterized in that said base unit (2), second battery (100) and optional component (101) comprise holding means (87), (115) , (108) for holding said second battery (100) and said optional component (101) in said second mounting recess (61), and said holding means (87), (115), (108) comprise first engaging means (87) formed in said base unit (2), second engaging means (103), (115) formed in said second battery (100) and said optional component (101) and engaging with said first engaging means (87), and maintaining means (108) for maintaining an engaging state between said first engaging means (87) and said second engaging means (103), (115).

Claim 9

The portable electronic apparatus according to claim 8, characterized in that said maintaining means (108) is a screw (108) which passes through said second battery (100) or said optional component (101) and is screwed into said base unit (2).

Claim 10

The portable electronic apparatus according to claim 4, characterized in that said upper surface (5c) of said rear portion (5b) is placed at a position which is higher than that of said front portion (5a), said display unit (3) is rotatably attached to said rear portion (5b), said display unit (3) has an outer surface (10a), which is rotated at the portion between a closed position covering said keyboard (7) and an open position exposing said keyboard (7) when said keyboard (7) is operated, and which is flush with said upper surface (5c) of said rear portion (5b) when the keyboard (7) is rotated at the closed position.

Claim 11

A portable electronic apparatus characterized by comprising: a substantially square base unit (2) having an upper surface (5c) and peripheral surfaces (5d), (5e), which are continuous with said upper surface (5c), and a first mounting recess (60) opening to said upper surface (5c) and said peripheral surfaces (5d), (5e) in series and a second mounting recess (61); a first battery (68) having a substantially the same shape as that of said first mounting recess (60), detachably attached to said first mounting recess (60), functioning as a drive power source, and said first battery (60) exposed to the outward portion of said base unit (2) as being attached to said first mounting recess (60), having outer surfaces (69a), (69b) constituting a part of said upper surface (5c) of said base unit (2) and that of said periphery surfaces (5d), (5e); and a second battery (100) having a substantially the same shape as that of said second mounting recess (61), selectively and detachably attached to said second mounting recess (61), functioning as a drive power source, and an optional component (101) for expanding a function having a substantially the same shape as that of said second mounting recess (61), selectively and detachably attached to said second mounting recess (61), and said second battery (100) and said optional component (101) exposed to the outward portion of said base unit (2) as being attached to said second mounting recess (61), having outer surfaces (102a), (102b), (103) constituting a part of said upper surface (5c) of said base unit (2) and that of said periphery surfaces (5d), (5e).

Claim 12

The portable electronic apparatus according to claim 11, characterized in that said first mounting recess (60) and said second mounting recess (61) are arranged in parallel to be adjacent to each other, and their sizes are different from each other.