Light guiding device and indication apparatus

An indication apparatus, comprising:

• a lighting component adapted to emit light;
• and
• a light guiding device, comprising:
• a light guiding component, having an incident surface and an emergent surface, the emergent surface having a long-strap form with two opposite ends;
• and
• a piercing hole structure disposed between the incident surface and the emergent surface, an inner wall of the piercing hole structure being a smooth surface divided into two arc surface portions and two plane surface portions, each of the two plane surface portions is a flat surface, the two plane surface portions being parallel to each other and having the same length, the two arc surface portions being outwardly convex surfaces of some parts of the piercing hole structure for reflecting light only toward a reflective surface and the emergent surface of the light guiding component, the light passing through the incident surface being partly to the emergent surface via the piercing hole structure;
• wherein a dimension of the emergent surface is greater than a dimension of the incident surface, and a normal vector of the emergent surface is parallel to a normal vector of the plane surface portion;
• wherein a first distance between the emergent surface and the plane surface portion close to the emergent surface is greater than a second distance between the curved structure and the plane surface portion close to the curved structure, and the second distance is greater than a third distance between the two plane surface portions.