TW202215726A - Power cord and power adapter to improve the safety of electricity consumption - Google Patents

Abstract

A power cord includes a plug and an electric wire. The plug includes two conducting terminals and an overheating protection element, and the electric wire includes two conducting wires. One of the conducting wires is electrically connected to one of the conducting terminals, the other conducting wire is electrically connected to the overheating protection element, and the other end of the conducting wires is connected to an electrical appliance. A power cord includes a plug, a wire, and a socket, and an overheating protection element is located in the socket. A power adapter includes a base, two conducting terminals, an overheating protection element, and two plug terminals. The overheating protection element blocks the passing current when the temperature exceeds a predetermined temperature. In this way, the safety of electricity consumption is improved.

Description

Power cord and power adapter

The present invention relates to power cords and sockets; in particular, it refers to a power cord and power adapter with overload protection.

Generally, when an electrical appliance is in use, its power cord is connected to an AC outlet. When the electrical appliance is abnormally overloaded, or the conductive wire inside the power cord is short-circuited, a large amount of current will flow through, which will lead to the electrical appliance or the power cord. burn and cause fire, resulting in the safety and loss of life and property.

In order to avoid the above overload situation, there will be a no-fuse switch in the electrical switch box, which will trip when overloaded. However, the electrical circuit connected to the no-fuse switch may be connected to several sockets. When overload makes the no-fuse switch trip, it will make other sockets in the same electrical circuit power off, causing inconvenience to users.

In addition, although the AC socket or the electrical circuit connected to it can conduct electricity, it is not an ideal conductor, and there is still line resistance. When conducting electricity, heat will be generated due to line resistance. The AC socket or the electrical circuit connected to it will repeatedly heat up and cool down, which will cause aging and increase the line resistance. After the line resistance increases, more heat energy will be generated and the aging will be accelerated. Aged electrical circuits will generate high temperatures that may ignite surrounding items and cause fires. In addition, the AC socket will oxidize and increase the contact resistance, which will also generate high temperature when using electricity.

Therefore, how to increase the safety of electricity consumption when using electrical appliances is a problem that the inventors try their best to solve.

In view of this, the purpose of the present invention is to provide a power cord and a power adapter, which can block the power when the temperature is too high, so as to improve the safety of power consumption.

In order to achieve the above purpose, the present invention provides a power cord for connecting an electrical appliance, the power cord comprising a plug and a wire, wherein the plug comprises a main body, a first conducting terminal, and a second conducting terminal A terminal and an overheat protection element, a part of the first conductive terminal and the second conductive terminal are arranged in the main body, and the other part protrudes out of the main body; the first conductive terminal and the second conductive terminal are connected The terminal is for connecting an alternating current; the overheating protection element is located in the main body and is electrically connected to the first conducting terminal; the wire includes two conductive wires and an insulating material, one end of the conductive wire is electrically connected to the overheating protection element , one end of the other conductive wire is electrically connected to the second conductive terminal; the other end of each conductive wire is electrically connected to the electrical appliance; the insulating material is wrapped around the periphery of the two conductive wires; wherein, the overheating protection element The current passing through is blocked when the temperature exceeds a predetermined temperature.

The present invention further provides a power cord, comprising a plug, a socket and a wire, wherein the plug comprises a first body, a first conducting terminal and a second conducting terminal, the first conducting terminal and the A part of the second conductive terminal is disposed in the first body, and the other part protrudes out of the first body; the first conductive terminal and the second conductive terminal are used for connecting an alternating current; the socket includes a first Two main bodies, a first plug-in terminal, a second plug-in terminal and an overheat protection element, the second main body has two sockets, the first plug-in terminal and the second plug-in terminal are arranged on the second body and corresponding to the two jacks respectively; the overheating protection element is located in the second body and is electrically connected to the first plug terminal; the wire includes a first conductive wire, a second conductive wire and an insulating material, wherein One end of the first conductive wire is electrically connected to the overheat protection element, and one end of the second conductive wire is electrically connected to the second plug terminal; the other ends of the first conductive wire and the second conductive wire are respectively electrically connected the first conductive terminal and the second conductive terminal; the insulating material covers the periphery of the first conductive wire and the first conductive wire; wherein the overheating protection element blocks the passage of electricity when the temperature exceeds a predetermined temperature the current.

The present invention provides a power adapter, comprising a base, two lead terminals, an overheat protection element and two plug terminals, wherein the base has two sockets; a part of each of the lead terminals is arranged on the In the base, the other part protrudes out of the base; the two conductive terminals are used for connecting an alternating current; the overheating protection element is located in the base and is electrically connected to one of the conductive terminals; each of the plug terminals is provided with in the base and corresponding to the two jacks respectively; one of the plug terminals is electrically connected to the overheat protection element, and the other plug terminal is electrically connected to the other conductive terminal; wherein, the overheat protection element is in When the temperature exceeds a predetermined temperature, the current passing through is blocked.

The effect of the present invention is to provide an overheating protection element, which can block the power when the temperature exceeds the predetermined temperature caused by the aging of the electrical circuit, overload, and the aging of the power cord and the power adapter itself, so as to effectively ensure the safety of electricity consumption and avoid the occurrence of accidental disasters. .

In order to describe the present invention more clearly, preferred embodiments are given and described in detail with the drawings as follows. Please refer to FIG. 1 and FIG. 2 , which are the power cord 1 according to the first preferred embodiment of the present invention. The power cord 1 is used to connect the electrical appliance 100 . This is limited, and it can also be an electrical appliance that consumes high power, such as an electric cooker, an induction cooker, and a microwave oven. The power cord 1 includes a plug 10 and a wire 18 .

The plug 10 includes a main body 12 , a plurality of conductive terminals 14 and an overheat protection element 16 , wherein the main body 12 is made of insulating material, such as plastic. The conductive terminals 14 are made of metal, and include a first conductive terminal 142 and a second conductive terminal 144 . The first conductive terminal 142 and a part of the second conductive terminal 144 are disposed in the main body 12 . , and the other part protrudes out of the main body 12 . In this embodiment, the first conductive terminal 142 has a first fixed section 142a and a first exposed section 142b, the second conductive terminal 144 has a second fixed section 144a and a second exposed section 144b, the The first fixed section 142a and the second fixed section 144a are fixed in the main body 12; the first exposed section 142b and the second exposed section 144b protrude out of the main body 12, and the first exposed section 142b and the The second exposed section is used for being inserted into an external AC socket (not shown) to connect the AC power.

The overheat protection element 16 is located in the main body 12 , and two ends of the overheat protection element 16 are respectively electrically connected to the first fixing section 142 a of the first conductive terminal 142 and the wire 18 . The overheating protection element 16 blocks the current passing through when the temperature exceeds a predetermined temperature. The overheating protection element 16 can be in an open-circuit state or a high-impedance state to block the current. The condition that the temperature exceeds the predetermined temperature may include any of the following conditions:

1. The power applied to the overheating protection element 16 exceeds the rated power of the overheating protection element 16, causing the temperature of the overheating protection element 16 to exceed the predetermined temperature, for example, the current or voltage is too large and overloaded.

2. The electrical appliance 100 or the power cord 1 is abnormal and overloaded.

3. The AC socket or its connected electrical circuit is aged, resulting in an increase in impedance. When the current passes through the AC socket or electrical circuit, heat energy is generated and conducted to the socket, causing the temperature of the overheat protection element 16 to exceed the predetermined temperature.

4. The thermal energy conducted from the conductive terminals 14 and the wires 18 causes the temperature of the overheat protection element 16 to exceed the predetermined temperature.

5. The thermal energy accumulated in the main body 12 is not dissipated enough, causing the temperature of the overheat protection element 16 to exceed the predetermined temperature.

The overheat protection element 16 can be a destructive or resettable overheat protection element 16 . The destructive overheat protection element 16 refers to an open circuit when the temperature exceeds the predetermined temperature and does not return to a short circuit, for example, a current fuse, a thermal fuse or a resistor. Taking the current fuse as an example, when the current passing through the current fuse exceeds a rated current, the temperature of the current fuse rises and exceeds a predetermined temperature and fuses, forming an open circuit and no longer electrically conducting. Taking the thermal fuse as an example, when the temperature of the thermal fuse rises above a predetermined temperature, it fuses, forming an open circuit and no longer electrically conducting. Taking a resistor as an example, when the power that the resistor bears is greater than a rated power, the temperature of the resistor will rise beyond a predetermined temperature, and the resistor will burn out and open.

The resettable overheating protection element 16 refers to that when the temperature exceeds the predetermined temperature, the current is blocked in an open-circuit or high-impedance manner. After the temperature returns to lower than the predetermined temperature, the overheating protection element 16 returns to a short-circuit or low-impedance state. , so that the current can pass through again. The resettable overheating protection element 16 can be, for example, a positive temperature coefficient resistor (PTC for short) whose resistance value is proportional to the operating temperature. When the temperature is a predetermined temperature, the PTC resistor is generated corresponding to the predetermined temperature. A predetermined resistance value of the temperature forms a high-impedance state, so that the current cannot pass, so as to block the passing current; when the temperature is lower than the predetermined temperature, the resistance value of the positive temperature coefficient resistor decreases, reaching the state of electrical conduction, so that the current can pass through again. In addition, the resettable overheating protection element 16 can also be, for example, a temperature switch or a resettable fuse, which is in an open state when the temperature is higher than the predetermined temperature to block the passing current; when the temperature drops below the predetermined temperature After that, it returns to the short-circuit state (that is, the state of electrical conduction), so that the current can pass through again.

In this embodiment, the main body of the plug 10 is plastic injection molding, and the first fixing section 142a, the second fixing section 144a and the overheat protection element 16 are placed in a mold before injection molding, and the injection molding is performed. After that, the main body 12 can cover the first fixing section 142 a , the second fixing section 144 a and the overheating protection element 16 integrally, and the overheating protection element 16 is not exposed outside the main body 12 . In this way, the purpose of an integrated plug is achieved.

In another embodiment, the main body 12 of the plug 10 can also be assembled and combined by two half-shells, and the first fixing section 142a, the second fixing section 144a and the overheat protection element 16 are placed on two sides during assembly. Between the half shells, the main body 12 covers the first fixing section 142 a, the second fixing section 144 a and the overheat protection element 16 .

The wire 18 includes at least two conductive wires 18 and an insulating material 184 , and the insulating material 184 covers the periphery of the two conductive wires 18 . Two ends of one of the conductive wires 18 are electrically connected to the overheating protection element 16 and the electrical appliance 100 respectively, and two ends of the other conductive wire 18 are respectively electrically connected to the second fixed section 144a of the second conductive terminal 144 and the electrical appliance 100 . The appliance 100.

When the user inserts the first exposed section 142b of the first conductive terminal 142 of the plug 10 and the second exposed section 144b of the second conductive terminal 144 into an AC socket, the power cord 1 can conduct the AC power to the electrical appliance 100 for the electrical appliance 100 to operate. When the electrical appliance 100 operates abnormally, the conductive terminals 14 are short-circuited, or the two conductive wires 18 are short-circuited, the temperature of the overheating protection element 16 exceeds the predetermined temperature, the overheating protection element 16 blocks the passing current. In this way, the purpose of ensuring the safety of electricity consumption can be achieved.

In one embodiment, the conductive terminal 14 may further include a third conductive terminal, and the wire 18 may further include another conductive wire to connect the third conductive terminal and the electrical appliance, instead of the above-mentioned two conductive terminals 14 . Limited to two conductive lines 18 .

FIG. 3 shows a power cord 2 according to a second preferred embodiment of the present invention, which has substantially the same structure as the first embodiment. The difference is that the power cord 2 in this embodiment further includes a socket 20 . 20 is connected to the conductive wire 18 , the socket 20 is used for plugging into the two terminals 101 of the electrical appliance 100 , and the two conductive wires 18 and the electrical appliance 100 are connected through the socket 20 . In this way, when the destructive overheat protection element 16 is used, after the overheat protection element 16 is disconnected due to overload, the user can replace the entire set of power cords 2 .

4 and 5 show the power cord 3 of the third preferred embodiment of the present invention, which has substantially the same structure as the second embodiment, including a plug 22 , a socket 28 and a wire 40 , except that the overheating protection is provided. The element 36 is disposed on the socket 28, more specifically,

The plug 22 includes a first body 24 and a plurality of conductive terminals 26 . The first body 24 is made of insulating material. The conductive terminals 26 include a first conductive terminal 262 and a second conductive terminal 264 . A part of the first conductive terminal 262 and the second conductive terminal 264 are disposed in the first main body 24, and the other part protrudes from the outside of the first main body 24; the first conductive terminal 262 and the second conductive terminal 264 The terminal 264 is used for connecting the alternating current.

The socket 28 includes a second body 30 , a first plug terminal 32 , a second plug terminal 34 and the overheat protection element 36 . The second body 30 is made of insulating material and has two sockets 302 . The plug terminal 32 and the second plug terminal 34 are disposed in the second body 30 and correspond to the two sockets 302 respectively; the overheat protection element 36 is located in the second body 30 and is electrically connected to the first plug The terminal 32 and the overheat protection element 36 are the same as those in the first embodiment, and will not be repeated here. The first plug-in terminal 32 and the second plug-in terminal 34 are respectively connected to the two terminals 101 on the electrical appliance 100 for plug-in connection.

In this embodiment, the second main body 30 is plastic injection molding, and the first plug-in terminal 32, the second plug-in terminal 34 and the overheat protection element 36 are placed in the mold before injection, and then placed in the mold. After injection molding, the second main body 30 can cover the first plug-in terminal 32 , the second plug-in terminal 34 and the overheating protection element 36 integrally, and the overheating protection element 36 is not exposed outside the second main body 30 . Thereby, the purpose of the integrated socket 28 is achieved.

In another embodiment, the second body 30 can also be assembled and combined by two half-shells, and the first plug-in terminal 32 , the second plug-in terminal 34 and the overheat protection element 36 are placed in the assembly during assembly. Between the two half-shells, the second body 30 covers the first plug-in terminal 32 , the second plug-in terminal 34 and the overheat protection element 36 .

The wire 40 includes a first conductive wire 42 , a second conductive wire 44 and an insulating material 46 , wherein one end of the first conductive wire 42 is electrically connected to the overheat protection element 36 , and one end of the second conductive wire 44 is electrically connected to the overheat protection element 36 . Connect the second plug terminal 34; the other ends of the first conductive wire 42 and the second conductive wire 44 are respectively electrically connected to the first conductive terminal 262 and the second conductive terminal 264; the insulating material 46 It is wrapped around the first conductive wire 42 and the periphery of the first conductive wire 42 .

With the above-mentioned structure, the overheat protection element 36 can also block the passing current when the temperature exceeds the predetermined temperature, so as to achieve the purpose of ensuring electricity safety.

In one embodiment, there may also be more than three sockets 302 , conductive terminals 26 , plug-in terminals and conductive wires.

FIG. 6 shows the power adapter 4 according to the fourth preferred embodiment of the present invention, which includes a base 48 , two conductive terminals 50 , an overheat protection element 52 and two plug terminals, wherein the base 48 is It is made of insulating material and includes two sockets 482 . Each of the conductive terminals 50 has a fixed section 502 and a conductive section 504 , each of the fixed sections 502 is disposed in the base 48 , and each of the conductive sections 504 protrudes out of the base 48 .

The overheating protection element 52 is located in the base 48 and is electrically connected to one of the conductive terminals 50 . The overheating protection element 52 is the same as the first embodiment and will not be described again. Each of the plug-in terminals 54 is disposed in the base 48 and corresponds to the two sockets 482 , wherein one of the plug-in terminals 54 is electrically connected to the overheat protection element 52 , and the other of the plug-in terminals 54 is electrically connected to the other The lead terminal 50 .

In this embodiment, the base 48 integrally covers the fixed section 502 of each of the conductive terminals 50 , the two plug terminals 54 and the overheating protection element 52 , and the overheating protection element 52 is not exposed on the base 48 . In addition, an integrated power adapter 4 is formed. In other embodiments, the base 48 can also be assembled from a plurality of shells.

After the two conductive terminals 50 are inserted into the AC socket, the conductive terminals of another external plug can extend into the two sockets 482 and be inserted and connected to the two plug terminals 54 . Thereby, the AC power is supplied through the power adapter 4, and when the temperature of the overheat protection element 52 exceeds a predetermined temperature, the overheat protection element 52 blocks the passing current.

According to the above, the power cord and the power adapter of the present invention are provided with an overheat protection element inside, which can be blocked when the electrical circuit is aging, overloaded, and the temperature exceeds the predetermined temperature caused by the aging of the power cord and the power adapter itself. Electricity, effectively guarantee the safety of electricity consumption and avoid the occurrence of unexpected disasters.

The above descriptions are only preferred feasible embodiments of the present invention, and any equivalent changes made by applying the description of the present invention and the scope of the patent application should be included in the patent scope of the present invention.

[this invention] 1: Power cord 10: Plug 12: Subject 14: Conductor terminal 142: The first lead terminal 142a: First fixed segment 142b: First exposed segment 144: The second lead terminal 144a: Second fixed segment 144b: Second exposed segment 16: Overheat protection element 18: Wire 182: Conductive thread 184: Insulation 2: Power cord 20: Socket 3: Power cord 22: Plug 24: The first subject 26: lead terminal 262: The first lead terminal 264: The second lead terminal 28: Socket 30: Second subject 302: jack 32: The first plug terminal 34: The second plug terminal 36: Overheat protection element 40: Wire 42: The first conductive thread 44: Second conductive thread 46: Insulation material 4: Power adapter 48: Pedestal 482: jack 50: lead terminal 502: Fixed segment 504: Conductor segment 52: Overheat protection element 54: plug-in terminal 100: Electrical Appliances 101: Terminals

FIG. 1 is a schematic diagram of the connection between a power cord and an electrical appliance according to a first preferred embodiment of the present invention. FIG. 2 is a partially enlarged schematic view of the power cord of the first preferred embodiment. FIG. 3 is a schematic diagram of the connection between the power cord and the electrical appliance according to the second preferred embodiment of the present invention. FIG. 4 is a schematic diagram of the connection between the power cord and the electrical appliance according to the third preferred embodiment of the present invention. FIG. 5 is a partially enlarged schematic view of the power line of the third preferred embodiment. FIG. 6 is a schematic diagram of the power adapter of the fourth preferred embodiment.

1: Power cord

10: Plug

12: Subject

14: Conductor terminal

142: The first lead terminal

144: The second lead terminal

16: Overheat protection element

18: Wire

182: Conductive thread

184: Insulation

100: Electrical Appliances

Claims (10)

A power cord for connecting an electrical appliance, the power cord comprising: A plug includes a main body, a first conductive terminal, a second conductive terminal and an overheat protection element, a part of the first conductive terminal and the second conductive terminal are arranged in the main body, and the other part protrudes extending out of the main body; the first conductive terminal and the second conductive terminal are used for connecting an alternating current; the overheat protection element is located in the main body and is electrically connected to the first conductive terminal; A wire includes two conductive wires and an insulating material, one end of the conductive wire is electrically connected to the overheat protection element, and one end of the other conductive wire is electrically connected to the second conductive terminal; the other end of each conductive wire is electrically connected to the second conductive terminal; One end is electrically connected to the electrical appliance; the insulating material is wrapped around the periphery of the two conductive wires; Wherein, the overheat protection element blocks the passing current when the temperature exceeds a predetermined temperature. The power cord of claim 1, wherein the first conductive terminal has a first fixed section and a first exposed section; the second conductive terminal has a second fixed section and a second exposed section; the The overheating protection element is electrically connected to the first fixing section; the main body integrally covers the first fixing section, the second fixing section and the overheating protection element. The power cord as claimed in claim 1, wherein the overheat protection element is disconnected when the temperature exceeds the predetermined temperature and is no longer electrically conductive. The power cord of claim 1, wherein the overheat protection element is electrically conductive again when the temperature is lower than the predetermined temperature after blocking the passing current. A power cord for connecting an electrical appliance, the power cord comprising: A plug includes a first body, a first conducting terminal and a second conducting terminal, a part of the first conducting terminal and the second conducting terminal are disposed in the first body, and the other part protrudes out of the first main body; the first conductive terminal and the second conductive terminal are used for connecting an alternating current; A socket includes a second body, a first plug terminal, a second plug terminal and an overheat protection element, the second body has two sockets, the first plug terminal and the second plug terminal The overheat protection element is located in the second body and is electrically connected to the first plug-in terminal; A wire, including a first conductive wire, a second conductive wire and an insulating material, wherein one end of the first conductive wire is electrically connected to the overheat protection element, and one end of the second conductive wire is electrically connected to the second plug a terminal; the other ends of the first conductive wire and the second conductive wire are respectively electrically connected to the first conductive terminal and the second conductive terminal; the insulating material covers the first conductive wire and the first conductive wire the periphery of the conductive wire; Wherein, the overheat protection element blocks the passing current when the temperature exceeds a predetermined temperature. The power cord of claim 5, wherein the second body integrally covers the first plug-in terminal, the second plug-in terminal and the overheat protection element. The power cord as claimed in claim 5, wherein the overheat protection element is disconnected when the temperature exceeds the predetermined temperature and is no longer electrically conductive. The power cord of claim 5, wherein the overheat protection element is electrically conductive again when the temperature is lower than the predetermined temperature after blocking the passing current. A power adapter, comprising: a base with two jacks; Two conducting terminals, a part of each conducting terminal is arranged in the base, and the other part protrudes out of the base; the two conducting terminals are used for connecting an alternating current; an overheat protection element located in the base and electrically connected to one of the conductive terminals; Two plug-in terminals, each of which is disposed in the base and corresponds to the two jacks respectively; one of the plug-in terminals is electrically connected to the overheat protection element, and the other of the plug-in terminals is electrically connected to the other lead terminal; Wherein, the overheat protection element blocks the passing current when the temperature exceeds a predetermined temperature. The power adapter according to claim 9, wherein each of the conductive terminals has a fixed section and an exposed section; the base integrally covers the fixed section of each of the conductive terminals, the two plug-in terminals and the overheating section protection components.

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