Position detector for a spatial geared stepping motor

A rotary device comprising a fixed part and a rotary part rotatable about an axis of rotation (A1) with respect to the fixed part, the rotary device comprising an angular-position detector detecting the angular position of the rotary part with respect to the fixed part, the angular-position detector comprising:

• a magnet secured to the rotary part and able to generate magnetic flux along a radial axis (A2) of the rotary part,
• a binary magnetic-field detector secured to the fixed part and configured to switch from a state referred to as open to a state referred to as closed when the binary magnetic-field detector has the magnetic flux of the magnet passing through it, the binary magnetic-field detector comprising:
• a first reed switch, the first reed switch comprising two edges and being configured to switch from the state referred to as open, in which the two edges are distant from one another, to the state referred to as closed, in which the two edges are electrically connected, when the magnetic flux of the magnet is passing through the first reed switch,
• a second reed switch secured to the fixed part the second reed switch comprising two edges of the second reed switch and being configured to switch from the state referred to as open to the closed state when the magnetic flux of the magnet is passing through the second reed switch, the second reed switch being distant from the first reed switch by a predefined angle with respect to the axis of rotation (A1) of the rotary part, and
• the first reed switch and the second reed switch being comprised in a second component obtained from a high-performance thermoplastic material with a low outgassing rate.