In this paper, the contour of the shifter lever is defined with the analysis of the force between the shifter lever and the driven part.

通过对拨杆受力情况的分析，指出拨杆工作表面轮廓应为凹渐开线，并对设计含有这类拨杆件的机构提出了建议。

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The appearance is designed beautiful, avoiding the defect that the shifter lever is exposed; the design is novel and unique and the device is simple and pragmatic.

本设计外观美观，避免了拨杆外露的缺陷，创意很新颖独特，又简洁实用。

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