The present invention relates to a robotic finger (1) comprising: - connection means (4), arranged to connect with a portable device (2) according to a data exchange connection and so as to fix the connection means to the portable device, - several phalanxes (6) connected together in series, the first phalanx (61) of the series being connected to the connection means, the last phalanx (64) of the series having a free end - several motors (7, 14), each motor being arranged to allow a degree of freedom in rotation between two successive phalanges of the phalanx series or to allow a degree of freedom in rotation between the connection means and the first phalanx of the phalanx series.
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