Abstract:
A battery charger includes a main body and a switch circuitry deposited in the main body. The switch circuitry circuit transforms alternating or direct current input into a desired direct current output with a pair of switches protruding from the main body to control the output into different voltage and current values for different electronic appliances.

Description:
BACKGROUND OF THE INVENTION  
       [0001]     1. Field of the Invention  
         [0002]     This invention relates to a battery charger, and more particularly to a battery charger applied to different electronic appliances with two switches to adjust different output voltage and current values.  
         [0003]     2. Description of the Prior Art  
         [0004]     Electronic appliances have been widely used by families and individuals. Some appliances use alternating current, while the others use direct current. In particular to those portable electronic items, each appliance has different current and voltage requirement. Thus, a user needs to prepare different battery chargers. It is very inconvenient for a user to take along.  
       SUMMARY OF THE INVENTION  
       [0005]     It is the primary objective of the present invention to provide a battery charger, which outputs various voltage and current values for different electronic appliances.  
         [0006]     It is another objective of the present invention to provide a battery charger, which is easy to operate.  
         [0007]     It is a further objective of the present invention to provide a battery charger, which is cost effectiveness. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0008]      FIG. 1  is an explosive view of the present invention;  
         [0009]      FIG. 2  is a circuitry diagram of the present invention;  
         [0010]      FIG. 3  is a top view of the present invention;  
         [0011]      FIG. 4  is a perspective view of a second embodiment of the present invention, and  
         [0012]      FIG. 5  is a circuitry diagram of the second embodiment of the present invention.  
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0013]     As shown in  FIG. 1 , the present invention comprises a main body  1  and a switch circuitry  2 . In the preferred embodiment, alternating current (AC) transformed into direct current (DC) will be applied.  
         [0014]     The main body  1  comprises a base  11  adapted to secure the switch circuitry  2  therein, a cover  12 , and a lid  13 . The base  11  comprises a pair of plugs  11  at the bottom and an output plug  12  at one end to output direct current to an electronic appliance. The cover  12  is secured on the base  11  and comprises a pair of openings  121  on respective sides, a recess  122  at one end and a hole  123  at the opposite end thereof. The lid  13  is secured on the cover  12  and covers the openings  121 . The lid  13  comprises a hinge  132  at one end to be inserted into the hole  123 , and a latch  131  at the opposite end of the hinge  132  to be secured to the recess  122 .  
         [0015]     The switch circuitry  2 , as shown in  FIG. 2 , comprises a rectifier protecting circuit  21 , a voltage transforming circuit  22 , an output rectifier circuit  23 , an output control circuit  24 , and a light illumination circuit  25 . The rectifier protecting circuit  21  and the voltage transforming circuit  22  are connected to protect the entire circuit and to transform alternating current into direct current. The voltage transforming circuit  22  is to transform the home voltage (90˜264 volts) to the voltage as required.  
         [0016]     The output rectifier circuit  23  is to stabilize output pulse wave. The output control circuitry  24  comprises a number of electric resistances with different values to form a voltage selection circuit  241  and a current selection circuit  242  with a pair of switches  243  and  244  to control the voltage selection circuit  241  and the current selection circuit  242 , respectively. The switches  243  and  244  are used to adjust the values of the output voltage and the output current.  
         [0017]     The light illumination circuit  25  comprises a pair of diodes  251  which shows different colors to identify the charging status of the battery.  
         [0018]     To assemble the present invention, as shown in  FIG. 3 , the switch circuitry  2  is deposited in the base  11  of the main body  1 , and then the cover  12  is secured on the base  11 . The two switches  243  and  244  of the switch circuitry  2  are exposed from the openings  121  of the cover  12 . The lid  13  is secured on the cover  12  to conceal the switches  243  and  244 .  
         [0019]     To operate the present invention, a user may decide what voltage and current values their electronic appliance needs to adjust the switches  243  and  244  to vary the output voltage and current values as they need, and close the lid  13  to protect the switches  243  and  244  from being touched, accidentally.  
         [0020]     Further, this invention is able to transform alternating current and direct current to a desired value of direct current output, as shown in  FIGS. 4 and 5 . The switch circuitry  2  includes the rectifier protecting circuit  21 , the voltage transforming circuit  22 , the output rectifier circuit  23 , the output control circuit  24 , and the light illumination circuit  25 . All of the circuits are functioned identical to the above-mentioned circuits. The output rectifier circuit  23  comprises a direct current point which is connected to a receptacle  113 A of the base  11  of the main body  1  to be connected with a direct current plug  3  within a vehicle to charge battery. Thus, this invention is able to use both alternating and direct currents as power sources.