US Patent 7975345 Interdental brush

Interdental brush with an elongate brush body (12) which comprises an elastically compressible coupling member (19) for snapping-in in a receiving opening (18) of a brush handle (13); wherein the coupling member (19) comprises at least two expanding arms (27, 28) which are elastically movable towards each other; the coupling member (19), on its outer side, comprises a snap-in depression (26) in the region of the expanding arms (27, 28) for a positive-locking fit in the receiving opening (18) of the brush handle (13), the depression being delimited by shoulders (29) extending at right angles to the longitudinal axis of the brush body.