Patent Application
20150311702
1. Field of the Invention
The present invention relates to a power socket, especially to a safe power socket and a power extension device having the same which is capable of preventing a surge protection unit from being burned or bursted.
2. Description of Related Art
A general power socket is electrically connected to a plug through a power cable, when the plug is inserted for obtaining the public electricity, the electrical power of the public electricity can be extended to the power socket for providing the electrical power to an electronic product.
When in use, a surge caused by over voltage or lightning strike would pass the power socket and be transferred to the electronic product, so some electric components in the electronic product may be damaged due to the surge. As such, the skilled people in the art have developed a technology of using a surge protection unit for protecting the electronic product, but when the voltage difference exceeds the critical point of the surge protection unit, the surge protection unit would be burned or even bursted which may result in an accident.
For avoiding the above-mentioned situation, a technology of adopting a copper foil as a protection unit is developed for preventing the surge protection unit from being burned or even bursted, wherein the technology is to dispose a circuit board in a power socket, and the circuit board is formed with an electrical loop, the copper foil is electrically connected to a breaking location of the electrical loop. As such, when a surge or a large current is generated and before the surge protection unit is burned or bursted (i.e. before reaching the critical point of the surge protection unit), the surge or the large current would pass the electrical loop to melt and break the copper foil, thus the electronic product is protected and the surge protection unit is prevented from being burned or bursted.
However, for designing the copper foil being used for preventing the surge protection unit from being burned or bursted, the production of the required copper foil is extremely difficult and the unified length, width and thickness is very hard to be maintained, and the destructive test could not have the same result during the annual safety examination.
The present invention is to provide a safe power socket and a power extension device having the same, in which a protection wire is connected to an electrical loop, so the protection wire having a unified size can be easily manufactured; moreover, the protection wire is attached on an insulation member then respectively and electrically connected to two electrical conduction parts, so a protection set having a larger force applying area can be formed, and the protection set is able to be easily and smoothly inserted in a circuit board or adhered on the circuit board with a surface mount means, thereby greatly lowering the production difficulty and relatively increasing the yield rate.
Accordingly, the present invention provides a safe power socket which includes: a main body; a circuit board disposed in the main body and formed with two soldering parts; and a protection set electrically connected to the circuit board and including an insulation member, a protection wire and two electrical conduction parts respectively connected at one location and another location of the insulation member, the protection wire is formed with two end parts respectively and electrically connected to the two electrical conduction parts, the two electrical conduction parts of the protection set are respectively connected to the two soldering parts of the circuit board.
Accordingly, the present invention provides a power extension device having a safe power socket which includes: a plug; a power cable, one end thereof is electrically connected to the plug; and a power socket, electrically connected to the other end of the power cable and including a main body, a circuit board and a protection set, the circuit board is disposed in the main body and formed with two soldering parts; the protection set is electrically connected to the circuit board, the protection set includes an insulation member, a protection wire and two electrical conduction parts respectively connected at one location and another location of the insulation member, the protection wire is formed with two end parts respectively and electrically connected to the two electrical conduction parts, the two electrical conduction parts of the protection set are respectively connected to the two soldering parts of the circuit board.
In comparison with related art, the present invention has advantageous features as following: the protection wire can be manufactured to have the unified size; and the protection set having a larger force applying area can be formed, so the protection set is able to be easily and smoothly inserted in the circuit board or adhered on the circuit board with a surface mount means, thereby greatly lowering the production difficulty and relatively increasing the yield rate.
Preferred embodiments of the present invention will be described with reference to the drawings.
The present invention provides a safe power socket and a power extension device having the same. Please refer to
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The protection set 3 includes an insulation member 31, a protection wire 33 and two electrical conduction parts 32, wherein the two electrical conduction parts 32 can be formed in any status and respectively connected at one location and another location of the insulation member 31. According to this embodiment, each of the electrical conduction parts 32 is formed as an electrical conduction pin 321, the insulation member 31 is formed in a columnar status, and one end of each of the electrical conduction pins 321 is formed with an electrical conduction cap 325, the electrical conduction caps 325 of the two electrical conduction pins 321 are respectively sleeved at one end and another end of the insulation member 31 (the two ends can be correspondingly arranged as shown in figures), and one of the two electrical conduction pins 321 is further formed with a bending part 326, the bending part 326 is formed at any location defined between two ends of the electrical conduction pin 321; as such, one of the electrical conduction pins 321 is enabled to have its free end being oriented towards downward through the bending part 326 (as shown in
The protection wire 33 is formed with two end parts 331, 332, and the two end parts 331, 332 are respectively and electrically connected to one end (i.e. the electrical conduction cap 325) of the two electrical conduction pins 321, thereby enabling the protection wire 33 to be electrically connected between the two electrical conduction pins 321.
The protection wire 33 can be a copper wire having a relatively shorter length, two ends of the short copper wire are electrically connected to the two electrical conduction caps 325, and other portion of the short copper wire is arranged to be adjacent to the periphery of the insulation member 31, at this moment if the short copper wire is in contact with the insulation member 31, the situation of short circuit is prevented due to the insulation member 31 being made of an insulation material (such as a ceramic material); the protection wire 33 can be a copper wire having a relatively longer length, the long copper wire is firstly reeled on the insulation member 31 (as shown in
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According to the second embodiment of the present invention, the protection set 3a is adhered on the circuit board 2 with a means of surface mount technology (SMT), so the two electrical conduction blocks 322 of the protection set 3a are respectively soldered on the two soldering parts 21 of the circuit board 2.
Based on what has been disclosed above, advantages achieved by the present invention are as following: by adopting a copper wire to be formed as the protection wire 33, the protection wire 33 having a unified size can be easily manufactured, and the same result could be obtained in the annual destructive test; moreover, the protection wire 33 is firstly attached on the insulation member 31 then respectively and electrically connected to the two electrical conduction parts 32, the protection set 3, 3a having a larger force applying area shown in
Although the present invention has been described with reference to the foregoing preferred embodiment, it will be understood that the invention is not limited to the details thereof. Various equivalent variations and modifications can still occur to those skilled in this art in view of the teachings of the present invention. Thus, all such variations and equivalent modifications are also embraced within the scope of the invention as defined in the appended claims.
