Galvanometer positioning tool and laser printer

A galvanometer positioning tool, comprising:

• a base provided with a bearing surface, wherein the bearing surface is provided with a first concave spherical surface;
• a bracket placed on the bearing surface, wherein a positioning assembly is provided on a side surface of the bracket facing the bearing surface, the positioning assembly has a plurality of contact points abutted against the first concave spherical surface, the plurality of contact points are located on a virtual spherical surface, a spherical center of the virtual spherical surface coincides with a spherical center of a sphere where the first concave spherical surface is located, a galvanometer is mounted on the bracket, and a reflection center of the galvanometer is located on the spherical center of the sphere where the first concave spherical surface is located;
• and
• a rotation assembly comprising a first rotation rod and a second rotation rod, wherein the first rotation rod is fixedly connected to the second rotation rod, an axis of the first rotation rod is arranged parallel to and spaced from an axis of the second rotation rod, the axis of the first rotation rod is parallel to a y-axis of the galvanometer, the first rotation rod is rotatably connected to the base, the first rotation rod is capable of rotating relative to the base with the axis of the first rotation rod as a rotation axis, the second rotation rod is slidably connected to the bracket, and when the first rotation rod rotates relative to the base, the first rotation rod is capable of driving the bracket to rotate with the y-axis of the galvanometer as a rotation axis.