Writing instrument with resetting operating unit

A writing implement, comprising:

• a housing configured to receive a writing refill along a longitudinal axis, an operating side and a writing side,
• wherein an adjustment mechanism supported in the housing, having a guide bushing and a cam pin concentrically arranged therein and spring-loaded along the longitudinal axis on the writing refill, which cam pin is engageable with an end of the writing refill, wherein the cam pin is bringable into at least two locking positions, which are offset along the longitudinal axis, and
• a control arrangement having a resetting device, a freewheel couplable with an operating unit arranged at the operating side and a first cam bushing coupled with the freewheel,
• wherein the first cam bushing comprises a gliding surface curved at one side for a contacting surface of the cam pin,
• wherein the resetting device exerts a resetting force onto the operating unit,
• wherein the freewheel is a first rotatably supported body having a circumferential recess and forms an operative connection at least in a region with a second rotatably supported body, the first rotatably supported body and the second rotatably supported body being concentrically rotatable about the longitudinal axis, and
• wherein one of the first rotatably supported body and the second rotatably supported body is freely rotatable around its longitudinal axis in a first angle range and transfers a rotation from the operating unit to the first cam bushing outside of this first angle range.