| 摘要 |
PCT No. PCT/DK91/00051 Sec. 371 Date Jul. 21, 1992 Sec. 102(e) Date Jul. 21, 1992 PCT Filed Feb. 20, 1991 PCT Pub. No. WO91/13525 PCT Pub. Date Sep. 5, 1991.A earwax trap used with hearing-aid apparatus comprises a) in a first part (6) a space (8) adapted to communicate acoustically an interior part of the hearing-aid apparatus with the external auditory meatus of the user's ear, and b) an arrangement for preventing earwax having entered the space (8) from leaving same towards the interior part (3). The latter arrangement comprises at least one piston- or plug-shaped member (7), which is adapted by relative movement between itself and the first part (6) containing the space (8) to enter that space (8) in a first direction away from the interior part of the hearing-aid apparatus, and to leave the space (8) in the opposite direction and thus re-establish the acoustic connection between the interior part and the space (8). In this manner, earwax (15) having collected in the space (8) communicating with the user's external auditory meatus, can be expelled without using an external device, such as pipe cleaners or the like, and without risk of damage to the internal parts of the hearing aid.
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