An Optical Symbol Scanner

Abstract

The invention is applicable to the technical field of scanners, and provides an optical symbol scanner. The optical symbol scanner comprises a light source, a swinging device, a swing mirror, a light collecting reflector and a light receiver. The swinging device comprises an electromagnetic coil, a magnet, an elastic piece capable of carrying out elastic deformation, a fixed base, a rotary table and a swinging member, wherein the electromagnetic coil is arranged close to the magnet, one end part of the swinging member is fixedly connected with the magnet, and the other end is in transmission connection with the rotary table; the rotary table is fixedly connected with the swing mirror; two ends of the elastic piece are fixed at two side edges of the fixed base respectively, the other end of the swinging member drives the rotary table to swing when the swinging member swings, and a middle part of the elastic piece is pulled at the same time. The elastic piece can pull the swinging member when the swinging member swings towards the left side and the right side, thereby enabling the swinging member to return to the original position. The pulling length of the elastic piece is only half of the pulling length of an elastic piece in a traditional oscillator, so that the toughness of the elastic piece is not easy to be weakened. In addition, the difference between pulling forces imposed on the swinging member by the elastic piece at an initial position and a final position is small, and the swinging speed is uniform.

Description

technical field [0001] The invention belongs to the technical field of scanners, in particular to an optical symbol scanner. Background technique [0002] Optical symbol scanners, such as barcode scanners, are now widely used in supermarkets and material warehouses to manage goods in a regular and efficient manner. [0003] See figure 1 , which is a structure of an optical symbol scanner in the prior art, which mainly includes a laser emitter 1' (light source), an oscillating device 2', an oscillating mirror 3', a collecting reflector 4' and a light receiver 5' . The oscillating device 2' includes an electromagnetic coil 21', a magnet 22', a plastic shrapnel (not shown in the figure) and a oscillating member 25'. The magnet 22' is fixedly connected with the pendulum mirror 3'. After the electromagnetic coil 21' is energized, the magnet 22' is attracted, so that the swing member 25' swings to a certain range within a certain angle range, and then the plastic shrapnel uses ...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide an optical symbol scanner, which aims to solve the problems of the optical symbol scanner in the prior art that the toughness of the shrapnel of the oscillator is easily weakened and the swing speed of the oscillator changes greatly

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