1. Provide the winding space for the copper wire in the transformer.
2. Fix the core in the transformer.
3. The trunking in the skeleton provides a path for the transformer to produce a wire.
4. The metal pin in the skeleton is the pillar of the copper wire of the transformer. After the solder, it is connected with the PCB board and act as a conductive member when the transformer is working.
5. The bottom of the skeleton of the retaining wall, the transformer and the PCB board can produce a fixed role; for the solder produced when the tin reactor and PCB board, and the core and PCB board, to provide a certain distance; isolation core and tin reactor, to avoid Poor pressure.
6. The bumps, pits, or chamfers in the skeleton can determine the orientation or pin order of the transformer when it is used.