Medical instrument with a rotatable detent

1. A medical instrument, comprising

a shaft,

a handle connected to said shaft, said handle having a movable grip part and a fixed grip part, said movable grip part able to move in a path;

a tool insert guided along said shaft, said insert being connected to said movable grip part at its proximal end,

a tool provided at a distal end of said insert, said tool able to be actuated by moving said movable grip part,

a lock for locking said movable grip part in a position,

a detent for releasing said locking of said lock, said detent able to permanently release a locking function of said lock,

a rotatable stopping member arranged on said movable grip part, said rotatable stopping member able to move in a rotational plane, the rotational plane extending perpendicular or substantially perpendicular to said path of said movable grip part,

said rotatable stopping member able to be rotated between a first position not influencing said locking function of said lock, and a second position keeping said lock permanently away from a locking engagement.

2. The medical instrument of claim 1 , wherein said rotatable stopping member is designed as a rotary ring arranged distally in front of a finger ring of said movable grip part.

3. The medical instrument of claim 2 , wherein a rod protrudes radially from said rotary ring and said rod can be used to rotate said rotary ring.

4. The medical instrument of claim 3 , wherein in said first rotational position of said rotatable stopping member said rod extends in a plane of said finger ring of said movable grip part.

5. The medical instrument of claim 4 , wherein in said second position said rod extends laterally away from said movable grip part.

6. The medical instrument of claim 1 , wherein a range through which said rotatable stopping member can be rotated is approximately 90°.

7. The medical instrument of claim 1 , wherein a mechanism is arranged in said movable grip part, said mechanism allowing a locking function of said lock to be lifted in said first rotational position of said stopping member.

8. The medical instrument of claim 7 , wherein said mechanism has a rocker lever which is operatively connected to said lock.

9. The medical instrument of claim 8 , wherein said rocker lever has a pushbutton arranged in a finger ring of said movable grip part.

10. The medical instrument of claim 9 , wherein a pushing of said pushbutton lifts said lock from said locking position and releasing said pushbutton returns said lock into said locking position.

11. The medical instrument of claim 1 , wherein said lock is designed as a two-armed lever, with a first lever arm supporting latching teeth engaging in a locking manner with a latching element on said handle.

12. The medical instrument of claim 11 , wherein said movable grip part can be moved along a linear guide along said handle, and wherein said latching teeth of said two-armed lever face said latching element.

13. The medical instrument of claim 1 , wherein said lock is pretensioned by a spring such that said lock is pushed into said locking engagement.

14. The medical instrument of claim 13 , wherein said rotatable stopping member has a circumferential radially increasing cam face which lifts a first lever arm with latching teeth from a latching element when rotated from its first rotational position into its second rotational position.

15. The medical instrument of claim 14 , wherein said cam face can engage with a second lever arm of a two-armed lever.

16. The medical instrument of claim 15 , wherein a rocker lever engages with said first lever arm of said two-armed lever.

17. The medical instrument of claim 1 , wherein said movable grip part is able to move along a longitudinal axis between said fixed grip part and said shaft.

18. The medical instrument of claim 1 , wherein said movable grip part is able to move by pivoting.