Projection lamp

A projection lamp, comprising:

• a light source;
• a spotlight assembly;
• a film projection assembly;
• a lens;
• and
• a motor;
• wherein the spotlight assembly is disposed in a light emitting direction of the light source, and the spotlight assembly comprises condensing lenses directly facing the light source;
• the film projection assembly is disposed on one side, distal from the light source, of the spotlight assembly;
• the lens is disposed on one side, distal from the light source, of the film projection assembly;
• the lens comprises a plurality of lens structures, each of the plurality of the lens structures comprises a first surface facing the film projection assembly, the first surface is an arc surface protruding towards the film projection assembly;
• an output shaft of the motor penetrates through the spotlight assembly and the film projection assembly, the output shaft of the motor is fixedly connected to the lens, and the motor drives the lens to rotate;
• wherein the output shaft is penetrated through a center of the spotlight assembly;
• the film projection assembly comprises a pressing plate and at least one projection sheet;
• the at least one projection sheet comprises a plurality of patterns, the plurality of the patterns is uniformly disposed around the output shaft, and the pressing plate is pressed on one side, facing away from the spotlight assembly, of the at least one projection sheet;
• an optical signal emitted by the light source sequentially passes through the condensing lenses, the film projection assembly, and the lens;
• the optical signal, passing through a same position of the projection sheet, is circulated through the edge of the arc surface of each of the lens structures, the center of the arc surface of each of the lens structures, and the edge of the arc surface of each of the lens structures, patterns projected by the projection lamp are gradually changed from a periphery to a center and brightness of the patterns is changed from dark to bright, and then the patterns are gradually changed back from the center to the periphery and the brightness of the patterns is changed back from bright to dark.