Patent Application
20110080231
This Non-provisional application claims priority under 35 U.S.C. ยง119(a) on Patent Application No. 098133794 filed in Taiwan, Republic of China on Oct. 6, 2009 the entire contents of which are hereby incorporated by reference.
1. Field of Invention
The present invention relates to a power line filter, and, in particular, to a size-reduced, material-saving, labor-saving and high-yield power line filter.
2. Related Art
The basic structure of a conventional power line filter is composed of a socket and a housing disposed at one side of the socket. The electronic elements such as an X capacitor, a Y capacitor, a filter inductor and a ground inductor are disposed in the receptacle of the housing. However, because the filter inductor and the ground inductor are both disposed in the receptacle of the housing, the distance between them is quite short. Furthermore, the ground inductor is generally wrapped by an insulating tape only. Thus, the filter inductor, the ground inductor or other inductor elements are vulnerable to be interfered by each other so as to influence the filtering results. Additionally, the insulating tape wrapping the outside of the ground inductor is easily detached and cracked, and its insulating efficacy is quite limited as well. It results in generating sparks due to a high voltage difference, which is occasionally induced between the filter inductor and the ground inductor by a significant variation of magnetic fields at the moment of being powered on or off. This severely endangers the safety of use.
The present invention is to provide a power line filter, especially a size-reduced, material-saving, labor-saving and high-yield power line filter.
To achieve the above, the power line filter includes a socket, a housing, a plurality of filter elements and a ground inductor. The socket includes at least one power pin and a ground pin. The housing is assembled with the socket, and has a first receptacle and a second receptacle. The opening direction of the first receptacle is opposite to the opening direction of the second receptacle. The plurality of filer elements is disposed in the first receptacle, and at least one of the filter elements is electrically connected to the power pin. The ground inductor is disposed in the second receptacle and electrically connected to the ground pin.
The power line filter further includes a connecting element disposed between the socket and the housing to connect the ground pin to the ground inductor. The connecting element includes a protruding portion extending out from the opening of the second receptacle to connect the ground inductor. Preferably, the connecting element includes a groove to engage with the ground pin.
The housing further includes a division plate and a side plate. The division plate divides the housing into the first receptacle and the second receptacle. A first bottom plate used as a bottom portion of the first receptacle is extended from one of two corresponding ends of the division plate, and a second bottom plate used as a bottom portion of the second receptacle is extended from the other one of the two corresponding ends of the division plate. Preferably, the second bottom plate has a through hole to hold the ground inductor. The side plate is disposed between the first receptacle and the socket to insulate the ground pin from the plurality of filter elements. Preferably, the housing, the division plate and the side plate are formed as one piece with an insulating material.
The filter elements include an X capacitor, two Y capacitors and a filter inductor. The filter inductor is preferably disposed at the bottom of the first receptacle, and the X capacitor is disposed above the filter inductor. The two Y capacitors are disposed at one side of the X capacitor and the filter inductor, and located at one side in the first receptacle opposite to the socket. Preferably, the X capacitor and the filter inductor are electrically connected to the power pin.
The power line filter further includes at least one power terminal and a ground terminal. The at least one power terminal extends out from the housing. The filter inductor and the two Y capacitors are electrically connected to the power terminal. The ground terminal has two end portions extending out from the opening of the first receptacle and the second opening of the second receptacle, respectively. Preferably, one of the two end portions of the ground terminal is connected to the ground inductor, and the other one of the two end portions is connected to the Y capacitor. The housing has a groove, and the ground terminal is engaged within the groove. Preferably, the at least one power terminal and the ground terminal are disposed at one side of the housing opposite to the socket.
The power line filter further includes an insulating cover disposed on the opening of the first receptacle to cover the filter elements. The power line filter further includes a metal case and a first locking element. The metal case is mounted on the surfaces of the socket and the housing. The first locking element is used to assemble the metal case with the socket. The power line filter further includes a second locking element used to assemble the socket with the housing. Preferably, the power pins are a line wire pin and a neutral wire pin, and the power terminals are a line wire terminal and a neutral wire terminal.
The invention will become more fully understood from the detailed description and accompanying drawings, which are given for illustration only, and thus are not limitative of the present invention, and wherein:
The present invention will be apparent from the following detailed description, which proceeds with reference to the accompanying drawings, wherein the same references relate to the same elements.
As shown in
The power line filter further includes a connecting element 13 disposed between the socket 11 and the housing 12 to connect the ground pin 113 to the ground inductor 16. As shown in
As shown in
As shown in
The power line filter further comprises a first power terminal 151, a second power terminal 152 and a ground terminal 153. As shown in
The power line filter further includes an insulating cover 18 disposed on the opening of the first receptacle 121 to cover the plurality of filter elements 14. The power line filter further includes a metal case 17 and a first locking element 21. The metal case 17 is mounted on the surfaces of the socket 11 and the housing 12. The first locking element 21 is used to assemble the metal case 17 with the socket 11. As shown in
In summary, the power line filter of the present invention contains a plurality of filter elements and a ground inductor in two receptacles of a housing, respectively, among others the opening directions of the two receptacles are opposite with respect to each other. Thus, the ground inductor can be disposed upright at one side of a filter inductor so that it can shorten the length of the power line filter by improving the interior design and the element arrangement. Otherwise, taking advantage of the double-receptacle design, the present invention can omit the material and the process that use the insulating tape, and avoid the safety issue resulted from the detachment or the crack of the insulating tape during the manufacturing or executing processes thereof.
Although the invention has been described with reference to specific embodiments, this description is not meant to be construed in a limiting sense. Various modifications of the disclosed embodiments, as well as alternative embodiments, will be apparent to persons skilled in the art. It is, therefore, contemplated that the appended claims will cover all modifications that fall within the true scope of the invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 098133794 | Oct 2009 | TW | national |
