Patent ID: 8405641
Filing Date: 2013-03-26
Classification: B43K

Abstract:
1. A stylus comprising: an expansible structure installed inside a slot of a penholder, a chamber being formed inside the expansible structure, and a protrusion being formed on the expansible structure; an outer body for covering the expansible structure, an opening being formed on the outer body; and an inner body installed inside the chamber in a movable manner along a first direction for outwardly pressing the expansible structure when moving in the first direction, so that the expansible structure outwardly expands in a second direction and the protrusion on the expansible structure protrudes out of the opening on the outer body in the second direction for wedging inside the slot of the penholder, due to structural interference between the protrusion on the expansible structure and the slot of the penholder, and when the inner body of the stylus has been drawn out of the chamber of the expansible structure completely, the inner body not pressing the expansible structure in the second direction and the protrusion on the expansible structure resiliently contracting inside the outer body, so that the structural interference between the protrusion on the expansible structure and the slot of the penholder disappears and the outer body can be drawn out of the slot of the penholder in the first direction.