Now, the stylus of mobile phones and tablets is small in diameter because it needs to be built into the body, which leads to poor grip. In order to maintain the grip, Microsoft Surface Series has always used an external stylus, which is fixed on the body by magnetic adsorption. But even if it is magnetic adsorption, its loss probability and portability are greater than the built-in stylus.

On September 25, a patent of Microsoft's stylus was exposed, in which Microsoft added the axial centripetal folding and rotation function to the stylus, so that its diameter can be halved and placed in the body of the tablet. Microsoft has three solutions, the first two are to fill the gap of irregular stylus by rotating the thin shell, and the third is to open the stylus in half. The effect of the first two schemes is obviously better, but when you take out the stylus, you need to turn it into a "perfect" state, which is more troublesome than before. It is expected that the final effect will not be too good.

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