Reflector switching device with crank cam driven by lead screw to follow up

Abstract

The invention discloses a reflector switching device with a crank cam driven by a lead screw to follow up. Cranks are arranged on the two sides of the upper portion of a support, linear grooves are formed in the two sides of the lower portion of the support, a magnet is arranged in the middle of the lower portion of the support, and microswitches are arranged at the two ends of the linear groove on one side. The two sides of the upper portion of the reflector assembly are connected with crank swing ends on the two sides through rotating shafts respectively, cam followers are arranged on the two sides of the lower portion of the reflector assembly, and a magnetic attraction piece is arranged in the middle of the front side of the lower portion of the reflector assembly. The driving mechanism comprises a ball screw, a screw nut, a motor driving the ball screw, a sliding block and a blocking piece arranged on the screw nut, and a sliding sleeve sleeving the protruding end of the sliding block. The cam follower on one side is in rolling fit with the linear groove on one side, the cam follower on the other side is inserted into the protruding end of the sliding block in a rolling fit mode, the sliding sleeve is in rolling fit with the linear groove on the other side, the blocking piece is used for triggering the microswitches at the two ends of the stroke to trigger the generator, and when the cam followers reach the foremost end of the stroke, the magnet and the magnetic attraction piece are attracted. The device is stable and rapid in switching, free of jamming and high in repeated positioning precision.

Description

technical field [0001] The invention belongs to the field of optical mechanics, and in particular relates to a mirror switching device driven by a lead screw to follow a crank cam. Background technique [0002] Since precise and fast switching of mirrors is required in some optical systems, switching devices with high repeat positioning accuracy, high switching speed, and smooth switching are required. At present, the mirror switching devices adopted at home and abroad generally adopt translation switching mechanism and rotation switching mechanism. Although the translation switching mechanism can realize the rapid switching of the mirror group, in order to ensure the repeated positioning accuracy of the mirror group, its limit and self-locking mechanisms are generally more complicated, the processing and adjustment are also more complicated, and it will occupy a large space volume. This switching mechanism is not suitable for optomechanical systems with limited space. The...

AI Technical Summary

Problems solved by technology

Although the translation switching mechanism can realize the rapid switching of the mirror group, in order to ensure the repeated positioning accuracy of the mirror group, its limit and self-locking mechanisms are generally more complicated, the processing and adjustment are also more complicated, and it will occupy a large space volume. This switching mechanism is not suitable for optomechanical systems with limited space

Rotary switching mechanism (such as four-link switching mechanism, worm gear switching mechanism) can realize the self-locking property of the mirror, but there are also disadvantages such as poor repeat positioning accuracy and slow switching speed

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