The invention provides an auxiliary fastening device for assisting a cable being fastened onto a surface of an electronic apparatus, including a first connector disposed on the surface of the electronic apparatus. The cable includes a second connector adapted to the first connector and a plurality of signal lines coupled to the second connector. The auxiliary fastening device, according to the invention, includes a base having a top surface and a fastening member having a lower surface. When the second connector is connected to the first connector, by the fastening auxiliary fastening device according to the invention, the signal lines of the cable are disposed and fastened between the top surface of the fastening member, and the auxiliary fastening device is mounted onto the surface of the electronic apparatus.
An encoder includes a base member and a cover attachable to the base member. The cover includes a surface with an opening and a strain relief device associated with the opening. The strain relief device includes at least one extension member extending from the surface of the cover and at least one bar member extending from the at least one extension member. The strain relief device is integral with the cover.
