| 摘要 |
A metal retainer spring bent into a forwardly tapered flexible spring for retaining an acoustic ear tube for use with behind-the-ear devices. A rearward hook or tapering slot holds the acoustic ear tube with a friction fit. A forward opening admits the acoustic ear tube therethrough to transmit sound to the eardrum. The ear canal-contacting surfaces of each spring have a friction surface to limit slippage without causing abrasions.
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