Projection lamp with variable focal length

• Main Author: ZHANG CHENGCHUN
• Format: Patent
• Language: Chinese; English
• Published: 28.03.2023
• Subjects: BLASTING; FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF; HEATING; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21Sand F21V, RELATING TO THEFORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THELIGHT EMITTED; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21Sand F21V, RELATING TO USESOR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS; LIGHTING; MECHANICAL ENGINEERING; NON-PORTABLE LIGHTING DEVICES; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS; WEAPONS

The utility model relates to a variable focal length projection lamp, which comprises a shell, a base arranged in the shell, a projection structure and a zooming structure, the projection structure and the zooming structure are respectively arranged on the base, the base is provided with a sleeve, the projection structure is positioned at the front end of the sleeve, the zooming structure comprises two focal length lenses, a driving component and a zooming driving piece, and the driving component is positioned at the front end of the sleeve. The two focal length lenses are arranged in the sleeve in a front-and-back spaced mode, and the driving assembly is connected with the two focal length lenses and the zoom driving piece. A light-emitting unit of the projection structure projects light to a light-transmitting film, so that a pattern on the light-transmitting film is projected to the outside to generate a projection pattern, a film rotating assembly of the projection structure enables the light-transmitting