Releasable coupling and endoscopic instrument with a releasable coupling

An endoscopic instrument, comprising:

• a tool arranged at a distal end of the instrument, said tool being actively connected to a motor via a coupling, wherein the coupling comprises a releasable coupling, said releasable coupling comprising a first coupling half and a second coupling half, each of said first coupling half and said second coupling half comprising an engagement means, said engagement means corresponding to one another and said engagement means being positively engageable with one another, wherein at least one permanent magnet is arranged on at least one of said first coupling half and said second coupling half such that with an approach of said first coupling half and said second coupling half, said first coupling half and said second coupling half are rotated into a defined angular position relative to one another, with respect to a rotation axis, via a magnetic force produced by said permanent magnet, said first coupling half and said second coupling half forming a jaw coupling, said first coupling half comprising a first coupling half jaw, said second coupling half comprising a second coupling half jaw, said at least one permanent magnet being integrated in said first coupling half jaw and another permanent magnet being integrated in said second coupling half jaw, wherein an end of said at least one permanent magnet is flush with a planar axial face side of said first coupling half jaw and an end of said another permanent magnet is flush with a planar axial face side of said second coupling half jaw, wherein poles of said at least one permanent magnet and said another permanent magnet being aligned in a direction of said rotation axis, wherein said at least one permanent magnet of said first coupling half and said another permanent magnet of said second coupling half arranged opposite one another face one another with a same pole.

A releasable coupling for a transmission of a rotation movement, the releasable coupling comprising:

• a first coupling half;
• and
• a second coupling half, each of said first coupling half and said second coupling half comprising an engagement structure, said engagement structure corresponding to one another and said engagement structure being positively engageable with one another, wherein at least one permanent magnet is arranged on at least one of said first coupling half and said second coupling half such that with an approach of said first coupling half and said second coupling half, said first coupling half and said second coupling half are rotated into a defined angular position relative to one another, with respect to a rotation axis, via a magnetic force produced by said permanent magnet, said engagement structure of said first coupling half comprising a first coupling half projection, said first coupling half projection comprising a first coupling half projection planar surface, said first coupling half projection planar surface being arranged axially opposite said second coupling half with respect to a longitudinal axis of said first coupling half, said engagement structure of said second coupling half comprising a second coupling half projection, said second coupling half projection comprising a second coupling half projection planar surface, said second coupling half projection planar surface being arranged axially opposite said first coupling half with respect to said longitudinal axis of said first coupling half, said at least one permanent magnet being integrated in said first coupling half projection and another permanent magnet being integrated in said second coupling half projection, said at least one permanent magnet comprising a first planar magnet surface, said first planar magnet surface being aligned with said first coupling half projection planar surface, said another permanent magnet comprising a second planar magnet surface, said second planar magnet surface being aligned with said second coupling half projection planar surface, wherein poles of said permanent magnet and said another permanent magnet are aligned in a direction of said rotation axis, wherein said permanent magnet of said first coupling half and said another permanent magnet of said second coupling half are arranged opposite one another and face one another with a same pole.