Rear-view device

A rear-view device, comprising a helmet and a rear-view image guiding system arranged on the helmet, wherein the rear-view image guiding system comprises a light conduction optical fiber bundle, and an objective lens group and an eyepiece lens group arranged at two ends of the light conduction optical fiber bundle respectively;

• the helmet comprises a first cladding region and a second cladding region, the first cladding region is a region of the helmet corresponding to a front face region of a wearer, and the second cladding region is a region of the helmet except the first cladding region;
• the objective lens group is arranged in the second cladding region, light transmitted to at least a part of the second cladding region reaches the objective lens group, and the objective lens group is configured to convert received incident light into parallel light;
• the light conduction optical fiber bundle is configured to transmit the parallel light to the eyepiece lens group;
• and
• the eyepiece lens group is configured to converge the parallel light and transmit convergent light to an eye region of the helmet;
• wherein the eyepiece lens group comprises a second concave lens, a third convex lens and at least one reflector arranged in a transmission direction of the parallel light in sequence, a light-entering surface of the second concave lens is a plane, a light-exiting surface of the third convex lens is a curved surface protruding towards the transmission direction of the parallel light, and convergent light exiting from the third convex lens is reflected by the reflector and then transmitted to the eye region of the helmet;
• wherein the rear-view device further comprises an angle adjustment structure coupled to the helmet and the reflector and configured to adjust an angle of the reflector relative to the eye region;
• wherein the angle adjustment structure comprises:
• a first support structure fixedly coupled to the helmet and comprising an accommodation space, an inner bottom surface of the accommodation space being a first spherical surface;
• and
• a second support structure, the reflector being fixed on the second support structure, the second support structure comprising a second spherical surface and being arranged in the accommodation space, the second spherical surface being attached to the first spherical surface, and the angle of the reflector relative to the eye region being changed through the movement of the second spherical surface relative to the first spherical surface.