Lamp assembly and emergency lamp comprising the same

A lamp assembly, comprising:

• a front cover;
• a lens assembly;
• a light-emitting assembly;
• and
• a rear cover;
• wherein:
• the front cover and the rear cover are connected to each other to form a cavity, and the lens assembly and the light-emitting assembly are disposed in the cavity;
• the front cover comprises a first chamber;
• the first chamber runs through the front cover and the lens assembly is disposed in the first chamber;
• the lens assembly comprises a rotation trough and at least two lenses;
• the rotation trough comprises an end face, a second chamber, and an opening, and the at least two lenses are disposed in the second chamber;
• the opening of the rotation trough is disposed towards the light-emitting assembly;
• a transparent plate is connected to the end face, and one end of each of the at least two lenses is connected to the transparent plate;
• the light-emitting assembly comprises at least one light-emitting diode (LED), and the number of the at least two lenses is twice that of the at least one LED;
• and
• the rotation trough is rotatable with respect to the light-emitting assembly, and a projection of a rotation path of all of the at least two lenses on the light-emitting assembly covers the at lest one LED.