Expansion box for notebook computers
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates generally to an expansion device for computers, and more particularly to an expansion box for notebook computers which may be easily and conveniently mounted thereto. 
     2. Description of the Prior Art 
     Nowadays, portable notebook computers are in the main stream of the computer industry. Their compactness has made them very popular among consumers; however, they provide limited functions due to their small size. Hence, there are available on the market peripheral expansion devices for notebook computers. Notebook computers are directly connected to desk-top computers or expansion cartridges when in use in order to expand their functions, which means greater working space is required. 
     SUMMARY OF THE INVENTION 
     Accordingly, a primary object of the present invention is to provide an expansion box for notebook computers which may be mounted to a bottom side of a notebook computer so that it will not occupy space. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The foregoing and other features and advantages of the present invention will be more clearly understood from the following detailed description and the accompanying drawings, in which, 
     FIG. 1 is a perspective exploded view of an expansion board and an expansion unit of the invention; 
     FIG. 2 is a perspective exploded view of an expansion box and a notebook computer of the invention; and 
     FIG. 3 is a schematic perspective view of the invention after assembly. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     With reference to the drawings, the expansion box according to the present invention basically comprises an expansion box 1 and a notebook computer 2. 
     The expansion box 1 consists of a box 11, an expansion board 12 and a plurality of expansion units 13 accommodated in the box 11. 
     The box 11 includes a base 111 and surrounding walls 112. Both lateral side walls of the box 11 are respectively provided with male members 1121 for insertion into corresponding females members 22 at a bottom side of the notebook computer 2. In order that the notebook computer 2 may slant suitably downwardly after the box 11 is mounted to the notebook computer 2, the surrounding walls 112 are configured to gradually decrease in height from a point adjacent the expansion board 12 after the expansion board is fastened to a longitudinal side wall of the box 11. 
     The expansion board 12 is a plate-like structure with an expansion connector 121 disposed at an upper portion thereof for connecting with the notebook computer 2 and more than 1 unit connector 122 at a lower portion thereof, the unit connector 122 being connected to the expansion connector 121 via wires. A plurality of screw holes are respectively formed in either side thereof for passage of screws to fasten the expansion board 12 to the side wall of the box 11. 
     The expansion units 13 may be expansion cartridges or cards according to intended purposes. The expansion units 13 are respectively provided with a connector 131 for mating with the unit connector 122 to provide electrical connections between the expansion connector 121 and the expansion units 13 and may also be provided with externally connected connectors around their peripheries. 
     The notebook computer 2 is a conventional one essentially including a motherboard and a keyboard. A connector 21 is provided at a depression formed at a rear side of the notebook computer 2 and is connected to the motherboard inside. Besides, females members 22 are individually disposed on both sides of the bottom side of the notebook computer 2 for matching the male members 1121 of the box 11. 
     With further reference to the drawings, in assembly, the expansion board 12 is firstly locked to the box 11, and the expansion units 13 are then connected to the expansion board 12 by means of their connectors 131 engaging the corresponding unit connectors 122 of the expansion board 12. The male members 1121 of the box 11 are then inserted into the corresponding female members 22 of the notebook computer 2 such that the expansion connector 121 of the expansion board 12 engages the connector 21 of the notebook computer 2. As shown in FIG. 3, after assembly, the side of the notebook computer 2 with the display is at a higher position so that the keyboard is slightly slanting. Such an ergonomic design permits comfortable manipulation of the keyboard. 
     In addition, slots 1122 may be formed in the surrounding walls 112 of the box 11 to permit external connection or to facilitate mounting or replacement of cartridge type expansion units 13 which are correspondingly provided with expansion slots 132. Likewise, slots may also be formed in the expansion board 12. 
     Besides, as the expansion box 1 is an independent unit, it may be provided with a cover when adapted for constant use. Furthermore, the box 11 may be connected to the notebook computer 2 in various ways, other than that described herein. 
     Therefore, in actual use, the expansion box may be selectively mounted to or separated from the notebook computer as dictated by circumstances. 
     Although the present invention has been illustrated and described with reference to the preferred embodiment thereof, it should be understood that it is in no way limited to the details of such embodiment but is capable of numerous modifications within the scope of the appended claims.