Speaker unit for earphone
US11496840B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2021 |
| Grant date | Nov 8, 2022 |
| Priority date | — |
| Expiry date | May 9, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2201/10083
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is a speaker unit for an earphone. The speaker unit includes a frame, a magnet, a plate fixed to the frame and coming into contact with the magnet, a diaphragm, a coil disposed to be radially overlapped with the magnet and the plate, and a flexible printed circuit board (FPCB). Here, the FPCB includes a first area fixed to the diaphragm, a second area connected to the frame, and a plurality of third areas configured to connect the first area to the second area. The third area includes a contact point connected to the coil. The third areas each include at least one bent area, and a space is disposed between the third areas adjacent to each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.