CN103984091A

CN103984091A - Scanner oscillating mirror apparatus

Info

Publication number: CN103984091A
Application number: CN201310589118.8A
Authority: CN
Inventors: 周洁; 杨心怀; 王志特; 李丕勇; 杨慧
Original assignee: Suzhou Hao Chuan Information Technology Co Ltd
Current assignee: Suzhou Hao Chuan Information Technology Co Ltd
Priority date: 2013-11-21
Filing date: 2013-11-21
Publication date: 2014-08-13

Abstract

Disclosed is a scanner oscillating mirror apparatus. A permanent magnet is disposed on a fixed stator, a driving coil is designed on a rotatable flexible printed circuit board (FPC), an ultrathin reflector is pasted on the FPC, and through applying alternating currents to the coil, alternating magnetic field change is generated, changing effect forces are generated with the fixed permanent magnet, and the FPC is driven to generate oscillating motion, such that point laser irradiated on the reflector is changed to line laser. Since the mass of a whole rotation portion is even not one tenth of a mass by use of a conventional mode, the needed driving force is much too small and electricity is greatly saved, and since the FPC is simpler and easier to process, the consistence can be easily guaranteed.

Description

A kind of scanner pendulum lens device

Technical field

Scanner pendulum lens device belongs to a laser scanning system, is exactly that the laser point-like, becomes by the periodic wobble of pendulum mirror

The scan laser of linearity.Patent of the present invention relates generally to the version of pendulum mirror, the variation of the type of drive that pendulum mirror swings.

Background technology

The laser pendulum leaf device that conventional laser scanner uses in the market, has two kinds: a kind of is the driving force of utilizing micromachine (motor), and band movable pendulum mirror one-directional rotation, becomes the some laser of reflection into a scanning straight line; The 2nd, magnet is fixed on pendulum mirror, by fixing coil, produce alternating magnetic field, drive magnet, band movable pendulum mirror swings back and forth.Above method has two shortcomings; 1. the volume of pendulum lens device own is large; weight is also large; cause and drive needed electric current very large, for portable set, will provide larger battery capacity; battery capacity increase causes shell design complicated; the a series of variations such as current protection measure is complicated, have also increased the weight of whole equipment, are unfavorable for carrying.2. due to complicated structure, require assembly precision high, assembling production cost can be higher, cannot reduce costs, and impact is promoted on a large scale.

Patent of the present invention is used simpler structure, and more the type of drive of power saving, realizes the periodic wobble of putting mirror.

Summary of the invention

Tradition pendulum mirror mentality of designing in the past as shown in Figure 1, drive coil is fixed, on movable pendulum leaf, little permanent magnet is installed, control circuit produces exchange current to coil, thereby produce the changes of magnetic field of alternation, drive pendulum leaf to produce and swing, thereby the some laser being radiated on pendulum leaf is become to a laser scanning line.

Traditional inertial thinking mode is broken away from new invention, adopt device as shown in Figure 2, core concept is that the large permanent magnet of weight is placed on fixing stator by being placed on rotor instead, conversely by coil design on rotor that can be movable, because permanent magnet is fixing without rotation, therefore permanent magnet can suitably increase volume and strengthen magnetic, because coil design is on flexible PCB (FPC), utilize the tool of flexible circuit board own can bending and activity, cancel the coil-winding method of traditional approach, directly be printed in flexible circuit board, make the quality of whole rotating part only have traditional approach 1/10th less than, the driving force needing is also little a lot, therefore very power saving, add that flexible circuit board is more simple and easy to processing, consistance is easily protected.

Accompanying drawing explanation

Fig. 1 prior art schematic diagram

Fig. 2 new invention schematic diagram

Embodiment

1. permanent magnet is fixed on shell, support or mainboard.

2. coil is directly designed in flexible circuit board (FPC).

3. reflex reflector lens is bonded in flexible circuit board.

4. by adding the cyclomorphosis that exchange current is realized coil polarity to coil two ends.

5. the swing arm of pendulum lens device directly swings by the flexible movable characteristic of flexible circuit board.

Claims

1. the pendulum lens device of a new type scanner.Be that it utilizes the directly coil of design in flexible circuit board (FPC), produce the electromagnetism change in polarity in cycle, and produce and interact with fixing magnet, promote mirror tilt.

2. according to claim 1, describe, newly putting lens device is that the circuit of flexible circuitry intralamellar part is coiled into coil form, by add the electric current of alternation to coil, makes the electromagnetism polarity of coil produce periodically variation.

3. according to claim 1, describe, the swing arm of pendulum mirror is directly to utilize flexible circuit board itself crookedly to realize, and processes like this, and consistency of performance is good, and technique is simple, and cost is low.

4. according to claim 1, describe, drive and swing device, the permanent magnet that material is heavier, is directly fixed on pedestal.More frivolous FPC coil, participates in swinging, and the driving force of consumption is little, saves electric energy.