等效负刚度机构采用三束针的蚊子启发,实现方便插入

S. Aoyagi, Y. Takaoki, Hiroki Takayanagi, Chih-hao Huang, Takahiro Tanaka, Masato Suzuki, Tomokazu Takahashi, T. Kanzaki, T. Matsumoto
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引用次数: 16

摘要

蚊子的喙由七个微小的部分组成。其中唇、上颌骨在植入中起重要作用。唇是吸血的中心针;两个上唇分别在唇边的左/右针处。它们合作移动,也就是说,一个上颌骨向前,唇向前,另一个上颌骨向前,依次向前。我们注意到,它的上颌骨顶端有一个锯齿状的鱼叉状的形状,具有锚定的作用。我们提出的易插入机构如下:考虑等效刚度,即阻力与移动距离的比值。由于侧针的锚定作用,可使中心针推出时的总刚度小于零。我们将其命名为"负刚度机构"实验估计了制针拉/推过程中的等效刚度,验证了所提机制的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Equivalent negative stiffness mechanism using three bundled needles inspired by mosquito for achieving easy insertion
The mosquito proboscis is composed of seven micro parts. Among them, labrum and maxillae play important roles in insertion. The labrum is a central needle which sucks blood; two maxillae are left/right needles aside the labrum, respectively. They cooperatively move, i.e., one maxilla goes forward, labrum goes forward, another maxilla goes forward, successively. We noticed that the maxilla has a jagged harpoon-like shape on its tip area, which has an anchoring effect. We proposed the easy insertion mechanism as follows: the equivalent stiffness, which is the ratio of the resistance force relative to the moving distance, is considered. The total stiffness in pushing out the central needle can be made smaller than zero due to the anchoring effect of the side needles. We named it as “negative stiffness mechanism.” Equivalent stiffness during pulling/pushing a fabricated needle was experimentally estimated, which indicated the validity of proposed mechanism.
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