Patent Publication Number: US-10777946-B2

Title: Temperature control power cord, power cord with power-off indication, and power cord connected with load power source

Description:
TECHNICAL FIELD OF THE INVENTION 
     The present invention relates to the technical field of power cords, and more particularly, to a temperature control power cord, a power cord with power-off indication, and a power cord connected with a load power source. 
     BACKGROUND OF THE INVENTION 
     Power cords are widely used in every aspect of people&#39;s daily life. In order to prevent the power cord from overheating or even burning due to a short circuit or overload, most of the power plugs are internally provided with a temperature controller. When the temperature of the power plug is exorbitant, the temperature controller exerts control by switching-off the power-consuming equipment, thereby avoiding causing a fire due to the constant temperature rise of the power cord. In the prior art, the traditional power cord with a temperature controller fails to alarm a user when the power supply is cut-off at a high temperature. As a result, the power disconnection between the power-consuming equipment and the power cord cannot be detected timely, and the failure reason cannot be found quickly, severely affecting the normal operation of the power-consuming equipment. 
     SUMMARY OF THE INVENTION 
     The purpose of the present invention is to solve the shortcomings in the prior art by providing a temperature control power cord, a power cord with power-off indication, and a power cord connected with a load power source. The present invention has a unique structural design, and can monitor the temperature in the power plug. When the temperature in the plug is exorbitant, the electric connection between the power cord and the power-consuming equipment can be cut-off, thereby preventing the power cord from overheating, and warning the user that the power cord is in an off state. 
     To achieve the above purpose, the present invention adopts the following technical solution: 
     A temperature control power cord with a normally-on indicator light comprising a shell, a power output cord, a null wire pin that is arranged on one side of the shell, and is electrically connected with the power output cord, a live wire pin and a ground wire pin, wherein a temperature control switch is connected to the live wire pin in series, and an indicator light is connected between the live wire pin and the null wire pin in parallel. 
     In another preferred embodiment, the reset temperature of the temperature control switch  6  is 63±5° C. 
     In another preferred embodiment, the action temperature of the temperature control switch  6  is 78±3° C. 
     A temperature control power cord with a power-off indication circuit comprising a shell, a power output cord, a null wire pin that is arranged on one side of the shell, and is electrically connected with the power output cord, a live wire pin and a ground wire pin, wherein a temperature control switch is connected to the live wire pin in series, and a power-off indication control circuit board is connected between the live wire pin and the null wire pin in parallel, wherein a diode rectification filter module is arranged on the power-off indication control circuit board, and an indicator light that is electrically connected with the diode rectification filter module is arranged on the power-off indication control circuit board. 
     In another preferred embodiment, the reset temperature of the temperature control switch  6  is 63±5° C. 
     In another preferred embodiment, the action temperature of the temperature control switch  6  is 78±3° C. 
     A temperature control power cord connected with a load power source comprising a shell, a power output cord, a null wire pin that is arranged on one side of the shell, and is electrically connected with the power output cord, a live wire pin and a ground wire pin, wherein a temperature control switch is connected to the live wire pin in series, and the output end of the power output cord is electrically connected with a load power source, wherein the load power source comprises a power input end, and a power-off alarm circuit that is connected with the power input end in parallel, wherein the power-off alarm circuit is electrically connected with a battery that is arranged on the load power source, and a buzzer is arranged on the power-off alarm circuit. 
     In another preferred embodiment, the reset temperature of the temperature control switch  6  is 63±5° C. 
     In another preferred embodiment, the action temperature of the temperature control switch  6  is 78±3° C. 
     Compared with the prior art, the present invention has the following advantages: 
     The present invention discloses a temperature control power cord, a power cord with power-off indication, and a power cord connected with a load power source. The present invention has a unique structure, and can monitor the temperature in the power plug. When the temperature in the plug is exorbitant, the electric connection between the power cord and the power-consuming equipment can be cut-off, thereby preventing the power cord from overheating, and warning the user that the power cord is in an off state. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       To clearly expound the technical solution of the present invention, the drawings and embodiments are hereinafter combined to illustrate the present invention. Obviously, the drawings are merely some embodiments of the present invention and those skilled in the art can associate themselves with other drawings without paying creative labor. 
         FIG. 1  is a sectional view of the temperature control power cord with a normally-on indicator light of the present invention; 
         FIG. 2  is a sectional view of the temperature control power cord with a power-off indication circuit of the present invention; and 
         FIG. 3  is a sectional view of the temperature control power cord connected with a load power source of the present invention. 
     
    
    
     MARKING INSTRUCTIONS OF THE DRAWINGS 
     
         
         
           
             Shell  1 , Power Output Cord  2 , Null Wire Pin  3 , Live Wire Pin  4 , Ground Wire Pin  5 , Temperature Control Switch  6 , Indicator Light  7 , Power-off Indication Control Circuit Board  8 , Load Power Source  9 , Power Input End  90 , Power-off Alarm Circuit  10 , Battery  11 , Buzzer  12   
           
         
       
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Drawings and detailed embodiments are combined hereinafter to elaborate the technical principles of the present invention. 
     As shown in  FIGS. 1-3 , the present invention discloses a temperature control power cord with a normally-on indicator light. In this embodiment, the temperature control power cord with a normally-on indicator light comprises a shell  1 , a power output cord  2 , a null wire pin  3  that is arranged on one side of the shell  1 , and is electrically connected with the power output cord  2 , a live wire pin  4  and a ground wire pin  5 , wherein a temperature control switch  6  is connected to the live wire pin  4  in series, and an indicator light  7  is connected between the live wire pin  4  and the null wire pin  3  in parallel. 
     The operating principle of the temperature control power cord with a normally-on indicator light is the following: 
     The power cord is electrically connected with a power-consuming equipment. The temperature control switch  6  can monitor the temperature in the shell  1 , thereby exerting control by switching on/off the power-consuming equipment. When the temperature in the shell  1  is lower than the action temperature of the temperature control switch  6 , the temperature control switch  6  is switched-on, and the electric connection between the live wire pin  4  and the power output cord  2  is achieved. Thus, the power cord normally supplies power to the power-consuming equipment, and the indicator light  7  is turned on, showing that the power cord is in a normal operating state. When excessive current is caused by the poor contact or overload of the plug, the temperature in the shell  1  can reach the action temperature of the temperature control switch  6 . At this point, the temperature control switch  6  is automatically switched-off, the live wire pin  4  and the power output cord  2  are disconnected, the power cord stops supplying power to the power-consuming equipment, and the indicator light  7  is turned off. It means that the power cord is in a power-off state once the indicator light  7  is turned off, reminding the user to check the electric connection between the power cord and the power-consuming equipment in time. When the temperature in the shell  1  is decreased lower than the reset temperature of the temperature control switch  6 , the temperature control switch  6  is switch-on again, and the power cord starts to supply power to the power-consuming equipment. At the moment, the indicator light  7  is turned on again, showing that the power cord is in a normal operating state. 
     In the above embodiment, the reset temperature of the temperature control switch  6  is 63±5° C. 
     In the above embodiment, the action temperature of the temperature control switch  6  is 78±3° C. 
     The present invention also discloses a temperature control power cord with a power-off indication circuit, which comprises a shell  1 , a power output cord  2 , a null wire pin  3  that is arranged on one side of the shell  1 , and is electrically connected with the power output cord  2 , a live wire pin  4  and a ground wire pin  5 , wherein a temperature control switch  6  is connected to the live wire pin  4  in series, and a power-off indication control circuit board  8  is connected between the live wire pin  4  and the null wire pin  3  in parallel. A diode rectification filter module is arranged on the power-off indication control circuit board  8 , and an indicator light  7  that is electrically connected with the diode rectification filter module is arranged on the power-off indication control circuit board  8 . 
     The operating principle of the temperature control power cord with a power-off indication circuit is the following: 
     The power cord is electrically connected with a power-consuming equipment. The temperature control switch  6  can monitor the temperature in the shell  1 , thereby exerting control by switching on/off the power-consuming equipment. When the temperature in the shell  1  is lower than the action temperature of the temperature control switch  6 , the temperature control switch  6  is switched-on, and the electric connection between the live wire pin  4  and the power output cord  2  is achieved. Thus, the power cord normally supplies power to the power-consuming equipment. At this point, the power-off indication control circuit board  8  is switched off, and the indicator light  7  is turned off. The user can learn that the power cord is in a normal operating state from the off state of the indicator light  7 . When excessive current is caused by the poor contact or overload of the plug, the temperature in the shell  1  can reach the action temperature of the temperature control switch  6 . At this point, the temperature control switch  6  is automatically switched-off, the live wire pin  4  and the power output cord  2  are disconnected, and the power cord stops supplying power to the power-consuming equipment. When the power supply of the power cord is cut off, the diode rectification filter module rectifies and converts the current into pulsating direct voltage, and the indicating lamp  7  is in a flash state. Thus, the user can learn that the power supply of the power cord is cut-off from the flash state of the indicator light  7 , thereby checking the electric connection between the power cord and the power-consuming equipment in time. When the temperature in the shell  1  is decreased lower than the reset temperature of the temperature control switch  6 , the temperature control switch  6  is switch-on again, and the power cord starts to supply power to the power-consuming equipment. At the moment, the power-off indication control circuit board  8  is in an off state, and the indicator light  7  is turned off again, showing that the power supply of the power cord is restored. 
     In the above embodiment, the reset temperature of the temperature control switch  6  is 63±5° C. 
     In the above embodiment, the action temperature of the temperature control switch  6  is 78±3° C. 
     The present invention also discloses a temperature control power cord connected with a load power source, which comprises a shell  1 , a power output cord  2 , a null wire pin  3  that is arranged on one side of the shell  1 , and is electrically connected with the power output cord  2 , a live wire pin  4  and a ground wire pin  5 , wherein a temperature control switch  6  is connected to the live wire pin  4  in series, and the output end of the power output cord  2  is electrically connected with a load power source  9 . The load power source  9  comprises a power input end  90 , and a power-off alarm circuit  10  that is connected with the power input end  90  in parallel. The power-off alarm circuit  10  is electrically connected with a battery  11  that is arranged on the load power source  9 , and a buzzer  12  is arranged on the power-off alarm circuit  10 . 
     The operating principle of the temperature control power cord connected with a power source is the following: The power cord is electrically connected with a power-consuming equipment. 
     The temperature control switch  6  can monitor the temperature in the shell  1 , thereby exerting control by switching on/off the power-consuming equipment. When the temperature in the shell  1  is lower than the action temperature of the temperature control switch  6 , the temperature control switch  6  is switched-on, and the electric connection between the live wire pin  4  and the power output cord  2  is achieved. Thus, the power cord normally supplies power to the power-consuming equipment. At this point, the power-off alarm circuit  10  is cut off, and the buzzer  12  does not work. When excessive current is caused by the poor contact or overload of the plug, the temperature in the shell  1  can reach the action temperature of the temperature control switch  6 . At this point, the temperature control switch  6  is automatically switched-off, the live wire pin  4  and the power output cord  2  are disconnected, and the power cord stops supplying power to the power-consuming equipment. At the moment, the power-off alarm circuit  10  is connected with the battery  11  and enters a working state, and the buzzer  12  sounds an alarm under the control of the power-off alarm circuit  10 , reminding the user that the power supply of the power cord is cut off. Thus, the user can check the electric connection between the power cord and the power-consuming equipment in time. When the temperature in the shell  1  is decreased lower than the reset temperature of the temperature control switch  6 , the temperature control switch  6  is switch-on again, and the power cord starts to supply power to the power-consuming equipment. The power-off alarm circuit  10  is switched-off, and the buzzer  12  does not work. 
     In the above embodiment, the reset temperature of the temperature control switch  6  is 63±5° C. 
     In the above embodiment, the action temperature of the temperature control switch  6  is 78±3° C. 
     The description of above embodiments allows those skilled in the at to realize or use the present invention. Without departing from the spirit and essence of the present invention, those skilled in the art can combine, change or modify correspondingly according to the present invention. Therefore, the protective range of the present invention should not be limited to the embodiments above but conform to the widest protective range which is consistent with the principles and innovative characteristics of the present invention. Although some special terms are used in the description of the present invention, the scope of the invention should not necessarily be limited by this description. The scope of the present invention is defined by the claims.