Projection lens module and projector

A projector comprising a light source, a light valve, and a projection lens module, wherein

• the light source is configured to provide an illumination beam;
• the light valve is configured to convert the illumination beam into an image beam;
• and
• the projection lens module comprises two casings, a projection lens, and a carrier structure, wherein
• the projection lens is disposed between the two casings and configured to project the image beam;
• and
• the carrier structure comprises a bracket, at least one screwing member, and two buffer members, wherein the bracket has at least one aperture, the at least one screwing member passes through the at least one aperture to lock the bracket to the projection lens, a diameter of the at least one aperture in a first direction is greater than a diameter of the at least one aperture in a second direction perpendicular to the first direction, and the two buffer members are respectively disposed on opposite ends of the bracket and lean against the two casings in the first direction, respectively.