| 摘要 |
Each receiving bush (4) is provided with a collar (6) against which the sleeve (14) will abut when, starting with its free end, it is slid into the receiving bush (4) in such a way. The collar (6) prevents the sleeve (14) from being pushed out of the receiving bush (4) during use of the brush and that at a distance from the collar (6). The receiving bush (4) is provided with a stop member (7) protruding into the receiving bush, which, on sliding the sleeve (14) in the receiving bush (4), can be brought out of the path of the sleeve (14) and after that provides for retaining the sleeve (14) in the receiving bush (14).
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