Design and fabrication of a microactuator for a hearing aid

Creutzburg, Tom; Rissing, Lutz; Lenarz, Thomas; Reuter, G.

doi:10.3233/jae-2012-1498

Cited by 1 publication

(1 citation statement)

References 5 publications

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“…However, multiple reflective surfaces result in large mirror and driving motor sizes; thus, it is difficult to realize the merits of low power consumption and compact size at the same time. The MEMS technique used in semiconductor processing has used in micro sensors and actuators [2,3], and this technique is an ideal method for developing thin optical scanners [4][5][6][7][8][9]. However, the use of piezoelectric or electrostatic elements to drive a MEMS scanner generally requires a high voltage in the electronic circuitry, which is difficult to achieve in low-cost portable devices [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Magnetic spring characteristic of an oscillatory actuator with silicone rubber torsion springs for optical scanner applications

Kinjo

Oyaizu

et al. 2014

JAE

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A compact electro-magnetic oscillatory actuator was proposed based on a pair of torsion springs for optical scanners operating at low oscillating frequencies, such as 50 Hz for a portable barcode scanner. Each torsion spring in the actuator is made of silicone rubber and is dually supported at both ends. A yoke is coupled with the driven coil to enhance the driving torque of the actuator. In this study, we analyzed the effect of the yoke on the resonant frequency of the actuator, as well as the torsion moment. We also experimentally determined the relationship between the resonant frequency and the magnetic gap of the yoke. Compared with the mechanical resonant frequency in the experiments, which was designed to be 50 Hz, the frequency was modified to 57.4 Hz, 54.7 Hz and 52.9 Hz when the gap between the yoke and the permanent magnet was 1.5 mm, 1.7 mm and 1.9 mm, respectively. The proposed actuator, which combines a yoke with flexible torsion springs, is potentially useful as a compact optical scanner, taking advantages of both low power consumption and high reliability. Y. Bu et al. / Magnetic spring characteristic of an oscillatory actuatorwhere J was calculated to be 1.46× 10 −9 kg/m 2 using 3D modeling software.

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