发明名称 |
VENT STRUCTURE FOR EAR PLUG |
摘要 |
PROBLEM TO BE SOLVED: To improve the sound insulation by eliminating the difference in the barometric pressure of ear plugs. SOLUTION: Communicating holes 6 and 7 which pass through several hubs 5 in sequence or communication holes which pass through spiral hubs in sequence constitute a vent structure for preventing the difference in the barometric pressure. |
申请公布号 |
JP2003032798(A) |
申请公布日期 |
2003.01.31 |
申请号 |
JP20010252143 |
申请日期 |
2001.07.18 |
申请人 |
MIMII DENSHI KK |
发明人 |
KUNO TAKASHI;OWADA KENJIRO;OGUSHI MASAHIKO |
分类号 |
A61F11/08;H04R25/00;(IPC1-7):H04R25/00 |
主分类号 |
A61F11/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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