Abstract: A writing instrument with a retractable refill mechanism comprises: an replaceable refill having a front end as the pen tip, a pen barrel which has a front end opening and accommodates said refill, a slider positioned at the rear end of the refill and slidable in the cavity inside of said pen barrel, a connecting rod with one end pivotally connected to said slider, an inner gear mounted inside of the pen barrel and off-axially and pivotally connected with said connecting rod, and an outer gear mounted inside of the pen barrel and engageable with said inner gear. Therefore, by means of the connecting rod off-axially connected to the rotatable inner gear, the rotation of the inner gear is converted to a linear motion of the slider.

Abstract: A writing implement includes a shaft, a refill having a writing tip and that is displaceable co-axially in the shaft, a resilient restoring member acting between the shaft and the refill, a shifting mechanism and a push member associated with the shifting mechanism. The shifting mechanism is actuable by the push member so the refill and its writing tip can be displaced into a writing position against the action of the restoring member and, with repeated actuation , is returned to a rest position. The push member co-operating with the shifting mechanism is movable axially in a longitudinal direction of the shaft and the refill. An actuating lever projects from the end of the shaft, remote from the writing tip, and pivots with respect to shaft. The actuating lever acts upon a side of the push member remote from the shifting mechanism, converting pivoting movement of the lever into axial movement of the push member.

Abstract: A writing implement (1) comprising a shaft (2), a refill (4) having a writing tip (3) and displaceable co-axially in the shaft (2), a resilient restoring member (7) co-acting between the shaft (2) and the refill (4), and a shifting mechanism (5) and a push member (6) associated therewith. The shifting mechanism (5) is actuable by the push member (6) and by means of which the refill (4) and its writing tip (3) can be displaced into a writing position against the action of the restoring member (7) and with repeated actuation can be displaced back into a rest position. The push member (6) co-operating with the shifting mechanism (5) is movable axially in the direction of the longitudinal extent of the shaft (2) and refill (4). An actuating lever (8) projects from the end of the shaft (2) remote from the writing tip (3) and is mounted for pivotal movement with respect to the shaft (2).