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Correction published on 8 January 2016, see Sensors 2016, 16(1), 80.

Open AccessArticle
Sensors 2015, 15(8), 20140-20151;

A Microgripper with a Post-Assembly Self-Locking Mechanism

Key Laboratory of Micro/Nano Systems for Aerospace, Ministry of Education, Northwestern Polytechnical University, Xi’an 710072, China
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 19 June 2015 / Revised: 10 August 2015 / Accepted: 10 August 2015 / Published: 14 August 2015
(This article belongs to the Section Physical Sensors)
Full-Text   |   PDF [1024 KB, uploaded 17 August 2015]   |  


In this work, we report a new design for an electrostatically actuated microgripper with a post-assembly self-locking mechanism. The microgripper arms are driven by rotary comb actuators, enabling the microgripper to grip objects of any size from 0 to 100 μm. The post-assembly mechanism is driven by elastic deformation energy and static electricity to produce self-locking and releasing actions. The mechanism enables the microgripper arms to grip for long periods without continuously applying the external driving signal, which significantly reduces the effects and damage to the gripped objects caused by these external driving signals. The microgripper was fabricated using a Silicon-On-Insulator (SOI) wafer with a 30 μm structural layer. Test results show that this gripper achieves a displacement of 100 μm with a driving voltage of 33 V, and a metal wire with a diameter of about 1.6 mil is successfully gripped to demonstrate the feasibility of this post-assembly self-locking mechanism. View Full-Text
Keywords: microgripper; self-locking; post-assembly; grip microgripper; self-locking; post-assembly; grip

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Yuan, G.; Yuan, W.; Hao, Y.; Li, X.; Chang, H. A Microgripper with a Post-Assembly Self-Locking Mechanism. Sensors 2015, 15, 20140-20151.

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