Patent Application
20110115593
The present invention relates to a transformer and a method of making the same; and more particularly to a transformer with an increased electrical insulation, and a method of making the same.
A transformer is a key component for a wild variety of electronic devices. The most pressing problems facing the industry will be the safety issue, especially when the design trend of electronic devices tends to reduce the device size and cost. As a matter of fact, the components inside various electronic devices are placed in high density nowadays.
In general, a conventional transformer would comprise a winding coil, a magnetic core, and a bobbin mounted by the winding coil. As shown in
As shown, a primary input port 311 and a secondary output port 417 are both placed on the bobbin 31 and extended outward from two opposite sides of the bobbin 31. The assembled transformer 10 appears just a bit larger than the magnetic core 11 since the bobbin 31 extend a bit outward for receiving power by the primary input port 311 and supplying power by the secondary output port 417. However, the assembled transformer 10 and the magnetic core 11 are tempted to be designed of almost the same size by the recent trend. This design is to spare more room for an electronic device to accommodate more components within a limited space under the high density condition.
On the other hand, the conventional transformer as illustrated in
Accordingly, several disadvantages emerge. While in fabricating, it is easily to be understood that such transformers would require paying more attention to the security of the insulating tape. Especially, the exposed portion is quite huge and the insulating tape is required to be attached and secured by hand in normal cases. Even though the tape has been attached precisely right to the required portion, the security of the tape can fail at any time resulting from inadvertently move or touch conducted by the worker during the assembly. Besides, the security of the insulting tape may come to be unstable over time. Following inspections are thus crucial and necessary all the time. Also, it appears that the conventional transformers may not be suitable for the use of the electronic devices which are under the high density design. Likewise, the traditional way has shown that more risks might arise while such transformers are for the use with a portable electronic device. As known, it is the nature of a portable device that any kind of unexpected collisions against the device can be reasonably expected in advance. The collision accidents may cause the components inside becoming, for example, loose or distortion, and may directly result in a breaking of the insulating which may lead to serious electrical safety issues.
Apparently, a transformer which is of simple construction and capable to meet the needs for increasing more safety in use and reducing costs in fabricating are in demand.
It is an object of an embodiment of the present invention to provide a transformer and a method of making the same in which the transformer has an improved insulator to separate the transformer, and especially the magnetic core, from other components so that the electrical safety of the transformer is capable to be more firmly secured.
It is another object of an embodiment of the present invention to provide a transformer and a method of making the same in which the transformer has an improved insulating case to protect the magnetic core from short circuit risk in collision accidents so that the stability of the electrical safety of the transformer is capable to be increased.
It is another object of an embodiment of the present invention to provide a transformer and a method of making the same in which the transformer is of simple construction and has an improved insulating slipcase engaged with the bobbin so that the fabrication work of the transformer is easier and the costs are lower.
In accordance with an aspect of the present invention, there is provided a transformer. The transformer comprises a magnetic core, a winding coil with a primary winding coil and a secondary winding coil, a bobbin with a primary input port and a bobbin connecting member, and an insulating slipcase. The bobbin is mounted by the winding coil. The insulating slipcase includes a first opening to receive the magnetic core, the winding coil and the bobbin, and includes a first side wall, a second side wall with a slipcase connecting member which is engaged with the bobbin connecting member, and a secondary output port for dealing with the output of the transformer. The primary input port is for receiving the power and the secondary output port is for supplying the power. The first side wall is opposite to the first opening and has a second opening for the output of the secondary winding coil. In one embodiment, the transformer is placed on a circuit board, and the two ports are respectively connected to the same. The insulating slipcase is engaged with the bobbin through the engagement between the slipcase connecting member and the bobbin connecting member.
In accordance with an aspect of the present invention, there is provided a method of manufacturing a transformer. The method includes the forming of a winding coil with a primary winding coil and a secondary winding coil, a bobbin with a primary input port and a bobbin connecting member, and an insulating slipcase with a first opening, a first side wall, a second side wall with a slipcase connecting member, and a secondary output port. The first side wall is opposite to the first opening and has a second opening for the output of the secondary winding coil. The method also requires placing the winding coil around the bobbin, incorporating the bobbin with a magnetic core, accommodating the magnetic core, the winding coil, and the bobbin in the insulating slipcase through the first opening, and engaging the slipcase connecting member with the bobbin connecting member.
The above contents of the present invention will become more readily apparent to those ordinarily skilled in the art after reviewing the following detailed description and accompanying drawings, in which:
The present invention will now be described more specifically with reference to the following embodiments. It is to be noted that the following descriptions of preferred embodiments of this invention are presented herein for purpose of illustration and description only. It is not intended to be exhaustive or to be limited to the precise form disclosed.
In this embodiment, the bobbin 31 comprises a perforation channel 313 to accommodate a central post 111, and the central post 111 is placed and accommodated vertically to the bobbin. However, it may be preferred to be placed horizontally in other cases, such as shown in
In this embodiment, it is easily to be understood that the engagement type and the placement of the at least two sets respectively placed on the primary input port 311 and the insulating slipcase 41 which are illustrated in
According to the foregoing description, the present invention has disclosed a transformer which is capable to improve the insulation of a transformer, solve the problems occurred in the conventional way, and suitable for a wild variety of electronic devices, such as a switching power supply.
While the invention has been described in terms of what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention needs not be limited to the disclosed embodiment. On the contrary, it is intended to cover various modifications and similar arrangements included within the spirit and scope of the appended claims which are to be accorded with the broadest interpretation so as to encompass all such modifications and similar structures.
| Number | Date | Country | Kind |
|---|---|---|---|
| 098139221 | Nov 2009 | TW | national |
