| 摘要 |
PROBLEM TO BE SOLVED: To prevent the fault of an electronic circuit or the like due to sweat and dust, etc., without obstructing the function of a hearing aid, to easily exchange a battery, to easily perform attachment and detachment to/from the hearing aid and to lower a price by forming a cylindrical cover body capable of covering the outer periphery of a hearing aid main body by knitting and forming opening parts at both ends of the cover body. SOLUTION: A cylindrical cover body 2 in a size for covering the outer periphery of an ear hooking type hearing aid main body 1 is formed by knitting. Both end opening parts 3 of the cover body 2 are formed by the elastic pieces 4 of a rubber thread or the like. As the material of the knitting, cotton yarn is used. Cotton appropriately absorbs moisture and is provided with excellent texture and large washing resistance. Thus, even at the time of sweating during use, the cover body 2 absorbs the moisture and prevents it from sticking to the hearing aid main body 1, the gathering of sound is not obstructed even when a microphone part is covered with the cover body 2 by the air permeability of the knitting and the function of an air battery is not adversely affected. |
