the invention relates to a movable element (1) for a dependent person, with shelldefining a storage space (c) accessible via an opening arranged in the first casing.the first sealing means cooperating with said first opening of the first envelope, and locking means (10) adapted to prevent movement of the first means to"on the first envelope. a piece of furniture (1) comprises a module (54) cooperating with the first sealing means.
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