Abstract:
A power lock device for safe power output/input is a control lock composed of coding devices, decoding devices and electromagnetic switches. The coded signal will attach to the power transmitting line and keeps on transmitting. After discerning that the coded signal is correct, the decoding device turns on electromagnetic switches and conducts power to transmit. If the code is not correct, the decoding device uses the electromagnetic switches to cut off power and achieves the function of power control.

Description:
BACKGROUND OF THE INVENTION  
         [0001]    1. Field of the invention  
           [0002]    The present invention relates to a power lock device for safe power source output/input. The device is a control lock using coded signals attached to the power line, and is a power lock for safe power source output/input which can avoid the accident of an electric shock resulted form moving an electric appliance haphazardly and carelessly insert an electric conduct into a socket.  
           [0003]    2. Description of the prior art  
           [0004]    The commonly seen power outlets, whereon several sockets have the only function of providing power, are set up at many places in a house. Sometimes, some sockets are not used and are very possible to become the origin of accident. For the reason, the commonly seen power lock device, such as Taiwan Patent 306704 (hereafter, the cited case), is invented. The main characteristics of the commonly seen power lock device are: a power outlet which can receive power and is set on the wall or a positioned object, several sockets thereon for plugging in objects requiring power, a button switch for starting the control circuit in the socket and encode the control circuit to make the socket ready for use. Main disadvantages of the construction are: for the commonly seen power lock, a switch is equipped on the common outlet and controls whether the outlet is ready for use or not by the setting of the switch. In other word, the power lock controls whether power is conducted into the outlet by the only way of connecting the outlet with the switch. In this way, if the user carelessly insert an electric conductor into the socket as the outlet is ready for use, an accident of an electric shock may happen.  
           [0005]    Therefore, the commonly seen object described above has many disadvantages and is really not a perfect design requiring been improved.  
           [0006]    The inventor of the invention ruminated over the disadvantages resulted from the commonly seen outlet and the power lock device described above. After studying hard for a long period, the inventor finally succeed in inventing the power lock device for safe power output/input.  
         SUMMERY OF THE INVENTION  
         [0007]    The purpose of the present invention is to provide a power lock device for safe power output/input to avoid the accident of an electric shock resulted from inserting an electric conduct into the socket.  
           [0008]    The second purpose of the present invention is providing a power lock device for safe power output/input to cut the power of the socket immediately when an electric appliance departs from the socket.  
           [0009]    The other purpose of the present invention is providing a power lock device for safe power output/input for to avoid the condition that a electric appliance is moved haphazardly and also can limit danger electric appliances under usage to some specified places.  
           [0010]    The power lock device for safe power output/input that can achieve the purposes mentioned above comprises a power supply end and a power receiving end. The power supply end comprises a power circuit, an overload detector, a microprocessor, a signal dividing circuit, and a low power supply. The function of the power circuit is to transform alternating current into direct current, which is supplied to the components requiring direct current.  
           [0011]    The function of the overload detector is to detect if there is an overload in the power transmission line. If there is an overload in the power transmission line, the overload detector will transmit a signal to inform the microprocessor.  
           [0012]    The function of the low power supply is to output a safe low voltage, which is supplied to the components of the power-receiving end.  
           [0013]    One function of the signal dividing circuit is to detect the coded signal attached to the power line by the way of analog or digital regulation to check if an electric appliance is under using and transmit the coded signal, which has been analyzed, to the microprocessor to contract. The other function of the signal dividing circuit is to attach the coded signal from the microprocessor to the power line.  
           [0014]    The function of the microprocessor is to receive and analyze the signal from the overload detector and signal dividing circuit to control transmission of power.  
           [0015]    The power receiving end contains a power circuit, a microprocessor, and a signal dividing circuit. The function of the power circuit is to transform the power of the power line such that the components inside the power receiving end can use the transformed power.  
           [0016]    One function of the signal dividing circuit is to detect the coded signal attached to the power line by the way of analog or digital regulation to check if an electric appliance is under using and transmit the coded signal, which has been analyzed, to the microprocessor to contract. The other function of the signal dividing circuit is to attach the coded signal from the microprocessor to the power line.  
           [0017]    The functions of the microprocessor are to set a code, contract a code, and control supply of power. After the code is identified, the safe low voltage is turned off.  
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0018]    The drawings disclose an illustrative embodiment of the present invention, which serves to exemplify the various advantages and objects hereof, and are as follows:  
         [0019]    [0019]FIG. 1 A, B Schematic diagram of the present invention; and  
         [0020]    [0020]FIG. 2 Circuit diagram of the present invention; and  
         [0021]    [0021]FIG. 3 Flow chart of the power supply end of the present invention; and  
         [0022]    [0022]FIG. 4 Flow chart of the power receiving end of the present invention 
     
    
     DIAGRAM REMARKS  
       [0023]    101 Power receiving end  
         [0024]    102 Power supply end  
         [0025]    103 Electric appliance  
         [0026]    104 Socket  
         [0027]    201 Overload detector  
         [0028]    202 Power circuit  
         [0029]    203 Microprocessor  
         [0030]    204 Signal dividing circuit  
         [0031]    205 Electromagnetic switch B  
         [0032]    206 Power line  
         [0033]    207 Low power supply  
         [0034]    208 Power circuit  
         [0035]    209 Microprocessor  
         [0036]    210 Signal dividing circuit  
         [0037]    211 Electromagnetic switch A  
         [0038]    212 Electromagnetic switch C  
         [0039]    301 Output a safe low voltage  
         [0040]    302 Discern if the safe low voltage is overloaded  
         [0041]    303 Turn off the safe low voltage  
         [0042]    304 Delayed time  
         [0043]    305 Discern the code  
         [0044]    306 Turn off the safe low voltage and start AC output  
         [0045]    307 Identify the code  
         [0046]    308 Turn off AC output  
         [0047]    309 Discern if AC is overloaded  
         [0048]    401 Microprocessor start  
         [0049]    402 Send a code  
         [0050]    403 Discern the code  
         [0051]    404 Turn on the power of the electric appliance and transmit the code to the power supply end  
         [0052]    405 Discern if the code requires being modified  
         [0053]    406 Modify the code  
       DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0054]    Referring to FIG. 1 A, which is the schematic diagram of the power lock device for safe power output/input provided from the present invention, with the coded circuit in the power receiving end  101  and the decoded circuit in the power supply end  102 , the power lock device controls if alternating current is transmitted to the power receiving end  101  of the socket  104  and supply every electric appliances  103  for operation. For application, a power supply end can be connected with several power receiving ends such that control of different groups can be achieved. Besides, a power adaptor containing an input end and an output end can be made from the present invention.  
         [0055]    Referring to FIG. 1 B, which is the other schematic diagram of the power lock device for safe power output/input provided from the present invention, the power receiving end  101  can be set inside the electric appliance  103  directly such that control of usage of the electric appliance  103  can be achieved.  
         [0056]    Referring to FIG. 2, which is the circuit diagram of the power lock for safe power output/input, the power supply end  102  therein contains: an overload detector  201 , a power circuit  202 , a microprocessor  203 , a signal dividing circuit  204 , and a low power supply  207 . The function of the power circuit  202  is to transform alternating current into direct current, which is supplied to the components requiring direct current.  
         [0057]    The function of the overload detector  201  is to detect if there is an overload in the power line  206  and transmit the result of detecting to the microprocessor  203 .  
         [0058]    The function of the low power supply  207  is to output a safe low voltage to the power line  206  to supply the power receiving end  101  for usage.  
         [0059]    One function of the signal dividing circuit  204  is to analyze the coded signal attached to the power line  206  and transmits the coded signal, which has been analyzed, to the microprocessor to contrast. The other function of the signal dividing circuit  204  is to attach the coded signal from the microprocessor  203  to the power line  206 .  
         [0060]    The function of the microprocessor  203  is to receive the signal from the overload detector  201  and discern if the code is correct such that the electromagnetic switch A 211  and the electromagnetic switch B 205  can be controlled. Besides, the codes to be discerned can be more than one.  
         [0061]    The power receiving end  101  comprises a power circuit  208 , a microprocessor  209 , and a signal dividing circuit  210 . The function of the power circuit  208  is to transform the power of the power line  206  such that the components in the power receiving end  101  can use the transformed power.  
         [0062]    The function of the microprocessor  209  is to set a code, contract a code, and control the electromagnetic switch C 212 .  
         [0063]    One function of the signal dividing circuit  210  is to analyze the coded signal attached to the power line  206  and transmit the coded signal, which has been analyzed, to the microprocessor  208  to contract. The other function of the signal dividing circuit  210  is to attach the coded signal from the microprocessor  208  to the power line  206 .  
         [0064]    Referring to FIG. 3, which is the flow chart of the action of the power supply end of the present invention( please refer to FIG. 2 simultaneously), a safe low voltage is outputted first  301  and at this time, the electromagnetic switch A 211  is OFF while the electromagnetic switch B 205  is ON. Second step is to discern if the safe low voltage is overloaded  302 . If the safe low voltage is overloaded, it is turned off  303  and the electromagnetic switch A 211  and the electromagnetic switch B 205  are OFF at this time. After a period of delayed time  304 , the safe low voltage is outputted again. If the safe low voltage is not overloaded, the next step is to discern if the code is correct  305 . If the code is not correct, AC output is turned off  308  and the safe low voltage is outputted such that the electromagnetic switch A 211  is OFF while the electromagnetic switch B 205  is ON at this time. If the code is correct, the safe low voltage is turned off and AC output is turned on  306  such that the electromagnetic switch A 211  is ON while the electromagnetic switch B 205  is OFF at this time. Next step is to discern if AC is overloaded  309 . If AC is overloaded, AC output will be turned off  308  and the electromagnetic switch A 211  and the electromagnetic switch B 205  are OFF at this time. If AC is not overloaded, the code will be identified  307  and sent for discerning  305 .  
         [0065]    Referring to FIG. 4, which is the flow chart of action of the power receiving end of the present invention (please refer to FIG. 2 simultaneously), the microprocessor starts  401 , and the electromagnetic switch C 212  is OFF. Then, the code is sent  402  to discern  403  and if the code is incorrect, the code will be sent again  402 . If the code is correct, the power of the electric appliance is turned on and the code is transmitted to the power supply end  404  such that the electromagnetic switch C 212  is ON. The next step is to discern if the code require being modified  405 . If the code doesn&#39;t require been modified, the code keeps on sending. If the code require been modified, the modification of the code is executed  406  and the code is sent  402  after it is modified.  
         [0066]    Comparing with the cited case and another commonly seen technology described above, the power lock device for safe power output/input, which is provided from the present invention, has following advantages:  
         [0067]    1. The present invention is to provide a power lock for safe power output/input and can avoid the accident of an overload or an electric shock resulted from that the user insert an electric conductor into the socket.  
         [0068]    2. The present invention is to provide a power lock for safe power output/input and can immediately cut off power of the socket while an electric appliance is separated from the socket such that the function of the power lock is achieved.  
         [0069]    3. The present invention is to provide a power lock for safe power output/input such that the condition that an electric appliance is moved haphazardly can be avoided and the danger electric appliances under using can be limited to some certain places.  
         [0070]    Many changes and modifications in the above described embodiment of the invention can, of course, be carried out without departing from the scope thereof. Accordingly, to promote the progress in science and the useful arts, the invention is disclosed and is intended to limited only by the scope of the appended claims.