Disposable endoscope

A disposable endoscope, comprising:

• a steering mechanism for steering an optical head of the endoscope, wherein said steering mechanism comprising a thread pulling device capable of fastening at least two non-metal steering threads;
• wherein said thread pulling device, comprises:
• (i) a first and second knobs being capable of being rotated clockwise and counterclockwise;
• (ii) a first and second pulleys being coupled to said first and second knobs respectively on which the at least two non- metal steering threads are enwrapped, each pulley being configured for moving the optical head in opposite directions;
• (iii) a first and second tension wheels being coupled to said first and second pulleys respectively and being configured to lock the at least two non- metal steering threads and provide tension on each of the at least two non- metal steering threads, wherein each of said first and second tension wheels defines two slots for accommodating each of said at least two steering threads respectively and two openings through which a first extremity of each steering thread passes through respectively, wherein each of said at least two steering threads is capable of enwrapped around a respective slot in the tension wheel;
• wherein said first and second pulleys are configured for accommodating said first and second tension wheels respectively, such that by turning said first and second tension wheels into said first and second pulleys respectively, each non-metal steering thread is enwrapped around its respective slot, locked and fixed in the steering mechanism;
• said first and second tension wheels are fastened within said first and second pulleys respectively, to prevent each thread from becoming detached from the tension wheel, wherein a second extremity of said at least two non-metal steering threads is connected to the optical head of the endoscope, such that rotation of at least one of the first and second knobs is capable of moving the optical head of the endoscope.