Telescopic cleaning device, detection system and method for assembling the telescopic cleaning device

A telescopic cleaning device for an optical sensor of a vehicle, including a support sheath, a sprayer body, a sprayer adapted to be movable in translation relative to the sprayer body, with the sprayer body being adapted to be inserted in translation into the sheath and adapted to be attached in the sheath by blocking means. The sprayer body is thus prevented from coming out of the sheath, allowing secure attachment of the sprayer body in a vehicle. The invention also relates to a detection system and a method for assembling the telescopic cleaning device.