Quick-pluggable wireless earphone charging pin structure
By introducing a combination of conductive spring and trapezoidal retaining ring into the charging PIN structure of wireless earphones, the problem of easy wear between the PIN and metal contacts is solved, achieving stable contact and quick insertion and removal, thus improving the charging efficiency of wireless earphones.
CN224385663UActive Publication Date: 2026-06-19FREEWON CHINA CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FREEWON CHINA CO LTD
- Filing Date
- 2025-06-13
- Publication Date
- 2026-06-19
Smart Images

Figure CN224385663U_ABST
Abstract
This utility model relates to the field of wireless earphone technology, specifically to a quick-plug wireless earphone charging PIN pin structure. It mainly includes an outer cavity, with a piston cylinder connected to the inner side of the outer cavity, and a PIN pin body slidably connected to the inner side of the piston cylinder. The insertion / removal protection component includes a trapezoidal retaining ring, with a guide rod disposed on the inner side of the trapezoidal retaining ring, and a PIN pin tip disposed at the front end of the guide rod. The installation adjustment component includes an installation ring. This quick-plug wireless earphone charging PIN pin structure achieves unidirectional position adjustment by setting a foolproof structure on the inner side of the PIN pin body. The elastic connection of the conductive spring improves the buffer protection performance and increases the contact range. The elastic compression also ensures a tighter contact during charging. The dispersed PIN pin tips at the end of the PIN pin body increase the probability of contact with the earphone's metal contacts, reduce the probability of poor charging contact, and improve the efficiency of the PIN pin structure.
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