A drive for an insertion mechanism for an administering device having - a planar or curved base - a guide track which is formed in or on the base and defines a proximal and a distal end and a straight line or a curve therebetween - a slide which is provided in a rotationally fixed manner on the base and is slidable, in particular is movable back and forth, along or in the guide track between a proximal slide end position and a distal slide end position, - a drive wheel rotatably mounted on the base, which wheel is designed as a pinion and has two sectors (107a, 107b), the circumference of the pinion being toothed in one sector and no teeth being present in the other sector, - a drive track which is connected to the slide and is designed as a guide slot, the drive track having a plurality of drive portions which are designed as partial slots (103b, 103c) and which comprise toothings or pin arrangements for engagement in the toothing of the drive wheel, a first drive portion and a second drive portion being opposite one another and extending in parallel with the straight line or with the curve of the guide track, - an energy source by means of which the drive wheel can be rotated relative to the base and the slide, upon rotation of the drive wheel, the slide sliding, starting from in particular the proximal slide end position, by interlocking or frictional engagement of the toothed sector of the drive wheel in the first drive portion, along or in the guide track in the distal direction, until, at the distal end of the first drive portion, the interlocking or frictional engagement of the toothed sector of the drive wheel switches from the first to the second drive portion by a further rotation of the drive wheel, and the slide consequently slides along or in the guide track in the proximal direction, characterized in that the energy source can be coupled to the drive wheel via a one-part or multi-part transmission element and an introduction wheel, the introduction wheel being connected to the drive wheel so as to be secured against rotation, and the transmission element being arranged slidably or rotatably with respect to the base. - a planar or curved base - a guide track which is formed in or on the base and defines a proximal and a distal end and a straight line or a curve therebetween - a slide which is provided in a rotationally fixed manner on the base and is slidable, in particular is movable back and forth, along or in the guide track between a proximal slide end position and a distal slide end position, - a drive wheel rotatably mounted on the base, which wheel is designed as a pinion and has two sectors (107a, 107b), the circumference of the pinion being toothed in one sector and no teeth being present in the other sector, - a drive track which is connected to the slide and is designed as a guide slot, the drive track having a plurality of drive portions which are designed as partial slots (103b, 103c) and which comprise toothings or pin arrangements for engagement in the toothing of the drive wheel, a first drive portion and a second drive portion being opposite one another and extending in parallel with the straight line or with the curve of the guide track, - an energy source by means of which the drive wheel can be rotated relative to the base and the slide, upon rotation of the drive wheel, the slide sliding, starting from in particular the proximal slide end position, by interlocking or frictional engagement of the toothed sector of the drive wheel in the first drive portion, along or in the guide track in the distal direction, until, at the distal end of the first drive portion, the interlocking or frictional engagement of the toothed sector of the drive wheel switches from the first to the second drive portion by a further rotation of the drive wheel, and the slide consequently slides along or in the guide track in the proximal direction, characterized in that the energy source can be coupled to the drive wheel via a one-part or multi-part transmission element and an introduction wheel, the introduction wheel being connected to the drive wheel so as to be secured against rotation, and the transmission element being arranged slidably or rotatably with respect to the base. upon rotation of the drive wheel, the slide sliding, starting from in particular the proximal slide end position, by interlocking or frictional engagement of the toothed sector of the drive wheel in the first drive portion, along or in the guide track in the distal direction, until, at the distal end of the first drive portion, the interlocking or frictional engagement of the toothed sector of the drive wheel switches from the first to the second drive portion by a further rotation of the drive wheel, and the slide consequently slides along or in the guide track in the proximal direction, characterized in that the energy source can be coupled to the drive wheel via a one-part or multi-part transmission element and an introduction wheel, the introduction wheel being connected to the drive wheel so as to be secured against rotation, and the transmission element being arranged slidably or rotatably with respect to the base.