Encoder module adapted for a robotic arm

An encoder module adapted for a robotic arm, the encoder module comprising:

• a bracket comprising a ring-shaped structure, a plurality of extending rods extending from an outer periphery of the ring-shaped structure;
• a bearing embedded in the bracket, an inner periphery of the ring-shaped structure engaging with an outer periphery of the bearing;
• an adaptor ring embedded in the bearing, the adaptor ring comprising a ring-shaped flange portion and a protruding portion, the protruding portion being located adjacent to an inner periphery of the ring-shaped flange portion and protruding from a first side of the ring-shaped flange portion, an outer periphery of the protruding portion engaging with an inner periphery of the bearing;
• a circuit board fixed on the bracket and comprising a detector;
• and
• an encoder plate fixed on a second side of the ring-shaped flange portion opposite to the first side of the ring-shaped flange portion, the encoder plate being located at a position corresponding to the detector and located between the detector and the adaptor ring.