| CPC F21V 33/0052 (2013.01) [F21V 5/00 (2013.01); F21Y 2107/30 (2016.08); F21Y 2113/00 (2013.01); F21Y 2115/10 (2016.08)] | 20 Claims |

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1. A casing assembly, comprising:
a casing, provided with an accommodation recess formed by an inner wall surface and a light outlet portion formed by two inner peripheral edges, wherein the accommodation recess communicates with the light outlet portion; and
a light emitting module, disposed in the accommodation recess of the casing and located close to the light outlet portion, wherein the light emitting module is provided with a light emitting surface, and a normal line of the light emitting surface is non-parallel and non-perpendicular to an opening direction of the light outlet portion;
wherein the inner wall surface comprises an inner bottom surface, a first inner side surface and a second inner side surface, the first inner side surface and the second inner side surface are respectively connected to two opposite sides of the inner bottom surface, the first inner side surface is at an obtuse angle to the inner bottom surface, and the light emitting module is disposed on the first inner side surface.
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