Abstract:
A light, small sized, handy portable power supply set having a replaceable adapter disclosed herein can supply power to a variety of portable electronic devices such as a personal computer, a personal digital assistant, and a digital camera.

Description:
BACKGROUND OF THE INVENTION  
         [0001]    1. Field of the Invention  
           [0002]    The present invention relates to portable power supply set, and in particular, to portable power supply set having a replaceable power adapter for supplying power to a variety of portable electronic devices from a rechargeable power storage unit.  
           [0003]    2. Description of the Prior Art  
           [0004]    Following rapid development of computer science, various related products of the computer have become human auxiliary equipment in regular life, those equipment includes microprocessors, personal computers, and personal digital assistant (PDA) etc. Supplying power for these products are generally provided by a built-in rechargeable battery unit or separately installed dry battery unit. However, each product has its own compatible power supplier causes serious inconveniency that discourages people to use portable computer products and their peripheral equipment such as digital camera, recording pen, or cellular phone. Therefore, it is an urgent matter to develop a handy, portable and universally usable power supplying device for all kinds of portable computer products.  
           [0005]    A conventional power supply set is designed in a limited function only compatible with its same series of products, for example, a portable power supply set made by Palm Co. can only be used to serve its own products or products of other cooperated manufactures. Such a blunt and exclusive commercialized policy is far apart from the moral point of view appreciative to customers.  
           [0006]    Aiming at the above depicted problems, the present invention is to propose a remedy with a newly developed portable power supply set having a replaceable power adapter for supplying power to a variety of electronic devices from a rechargeable energy storage unit.  
         SUMMARY OF THE INVENTION  
         [0007]    It is an object of the present invention to provide a handy and space saving portable power supply set.  
           [0008]    It is another object of the present invention to provide a portable power supply set whose energy storage unit is a common rechargeable battery unit.  
           [0009]    It is still another object of the present invention to provide a portable power supply set which can supply power to a variety of load apparatuses such as a personal microprocessor, a digital camera, a personal digital assistant, a recording pen etc, with a replaceable power supply adapter.  
           [0010]    To achieve these and other objects described above, the portable, power supply et of the present invention comprises: an upper cover; a lower case having an open port at its lower part which is protected by an upwardly openable lid, a drilled hole is provided at each side surface of the lower case; a power supply interface board formed of an electrical circuit board with two electric contactors, a power input terminal and a power output terminal provided at proper positions of the electrical circuit board, the electrical circuit board is further provided with a replaceable power adapter and a first intermediate connector, while the power adapter is attached with a second intermediate connector such that the power is supplied from the power source to the load electronic devices; and an electric energy storage unit. The upper cover and the lower case are coupled to form a housing wherein the power supply interface board is accommodated. The power input and output terminals are emerged from each of the two drilled holes provided on both sides of the lower case. The electric energy storage unit is inserted into the housing from the open port, and the two electrodes of the electric energy storage unit are contacted with two electric contactors of the circuit board respectively. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0011]    The above object and other advantages of the present invention will become more apparent by describing in detail a preferred embodiment of the present invention with reference to the attached drawings in which:  
         [0012]    [0012]FIG. 1(A) is an upward view of the present invention;  
         [0013]    [0013]FIG. 1(B) is a downward view of the present invention;  
         [0014]    [0014]FIG. 2 is a three dimensional exploded view showing component parts of the present invention;  
         [0015]    [0015]FIG. 3 is a drawing illustrating one embodiment of the present invention; and  
         [0016]    [0016]FIG. 4 is a three dimensional exploded view of the power supply interface board of the present invention. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0017]    Referring to FIGS.  1 (A),  1 (B), and  2  simultaneously, it is clearly shown that the portable power supply set has a main body A composed of an upper cover  1 , a lower case  2 , a power supply interface board  3 , and an electric energy storage unit (battery unit)  4 . The lower case  2  is covered with the upper cover  1 , and has an open port  24  at its lower part which is protected with an upwardly openable lid  21 . A drilled hole  22  or  23  is provided at each side surface of the lower case  2 . The power supply interface board  3  is essentially formed of a circuit board  31  with two electric contactors  33  and  34 , a power input terminal  35  and a power output terminal  36  each provided at a proper position of the electric circuit board  31 . The two electric contactors  33  and  24  are connected to two electrodes of the electric energy storage unit  4  respectively. The electric circuit board  31  has a power adapter  32 . The power supply interface board  3  is installed in a housing formed by covering the upper cover  1  on the lower case  2 . The power input and the power output terminals  35  and  35  are respectively emerged from the drilled holes  22  and  23 . The electric energy storage unit  4  can be inserted into the housing from the port  24 , and the two electrodes of the electric energy storage unit  4  are contacted with two electric contactors  33  and  34  respectively. The electric energy storage unit  4  is securely protected in the housing by closing tightly the lid  21  of the open port  24 .  
         [0018]    Referring to FIG. 4, a three dimensional exploded view of the power supply interface board of the present invention. The electrical circuit board  31  is provided with a first intermediate connector  37 , while the power adapter  32  is provided with a second intermediate connector  38 . The electric power is conducted from the circuit board  31  to the power adapter  32  by interconnecting the first and the second intermediate connectors  37  and  38  together. The power adapter  32  is designed in various types.  
         [0019]    Returning to FIG. 3, a drawing illustrating an embodiment of the present invention, the power can be supplied to all kinds of portable computers  7 , personal digital assistants, or other electronic devices by replacing the power adapter  32  in accordance with the load apparatuses. As shown in the drawing, the power needed for an electronic device  8  such as a digital camera can be obtained by inserting a lead conductor  8   a  into the power output contactor  36 . The charging power of the energy storage unit  4  is obtained by connecting a lead conductor  9   a  to a computer power terminal  9  or a lead conductor  10   a  to a rectifying transformer (AC/DC adapter)  10 .  
         [0020]    It emerges from the description of the above embodiment that the invention has several noteworthy advantages, in particular:  
         [0021]    1. The portable power supply set is handy and space sawing.  
         [0022]    2. A common rechargeable battery unit can be used as the electric energy storage unit of the present invention.  
         [0023]    3. Power can be supplied to a variety of portable electronic devices by replacing the power adapter.  
         [0024]    While it will be apparent that the preferred embodiment of the present invention disclosed is well calculated to provide the advantages and features above stated, it will be appreciated that the invention is susceptible to modification, variation and change without departing from the proper scope or fair meaning of the subjoined claims.