Endoscope comprising holder for inserting a light guide
An endoscope includes a circuit board on which a light source is arranged, a light guide extending in the endoscope, which receives the light from the light source and guides it to an illumination device of the endoscope, and a holder having a light guide hole for inserting the light guide, wherein the cross-section of the light guide corresponds to the cross-section of the light source for optimizing the light transmission.
1 . An endoscope comprising:
a circuit board on which a light source is arranged;
a light guide extending in the endoscope and which receives light from the light source and guides it to an illumination device of the endoscope; and
a holder having a light guide hole for inserting the light guide, wherein a cross-section of the light guide corresponds to a cross-section of the light source, the holder comprising:
a spacer which protrudes toward a side of the circuit board and fixes the distance of a side of the light guide hole facing the circuit board to the light source, the spacer including an insertion protrusion configured to position the holder relative to the circuit board; and
an engaging hook which protrudes toward the side of the circuit board, the engaging hook having a nose configured to extend through and engage an underside of the circuit board such that the holder is fixed to the circuit board, the engaging hook positioned between the light guide hole and the spacer.
2 . The endoscope according to claim 1 , wherein
a cross-section of the light guide hole is approximately equal to the cross-section of the light guide.
3 . The endoscope according to claim 1 , wherein
the light guide hole has an opening for insertion of a plurality of light guides so that the light guides provided in plurality face the light source arranged on the circuit board such that a total cross-section of the light guides provided in plurality and of the light source are approximately equal.
4 . The endoscope according to claim 1 , wherein
the light source is an LED.
5 . The endoscope according to claim 1 , wherein
the light guide hole has a square cross-section.
6 . The endoscope according to claim 1 , wherein
a side of the holder facing the circuit board is spaced apart from the light source in a portion surrounding the light guide hole.
7 . The endoscope according to claim 1 , wherein
at the light guide hole, the holder has a light guide hole surrounding portion that surrounds the light guide hole,
the light guide hole surrounding portion has a flat surface directed towards the light source, and
the light guide is arranged in the light guide hole such that an end of the light guide directed towards the light source is in alignment with the surface of the light guide hole surrounding portion directed towards the light source.
8 . The endoscope according to claim 1 , wherein the light guide hole is centered to the light source.