| 摘要 |
PURPOSE: A built-in expandable and contractible earphone structure and terminal installation are provided to efficiently reduce damage to a cerebrum due to the electronic copy of terminal installation by drawing out a built-in expandable and contractible earphone from a built-in expandable and contractible earphone structure of a terminal device. CONSTITUTION: A built-in expandable and contractible earphone structure includes a housing(31) having an accommodation space. The built-in expandable and contractible earphone structure includes an earphone assembly(321) arranged in an accommodation space and an earphone(32) having an earphone line(322). The built-in expandable and contractible earphone structure includes a connection apparatus(33) connecting the earphone and terminal installation and an earphone line spool device(34) collecting the earphone line. Earphone assembly includes a main earphone assembly(3211), a sub earphone assembly(3212), and an earphone lever(3213). |
