Orientation-adjustment mechanism

An orientation-adjustment mechanism, adapted to be affixed to a mounting surface, comprising:

• a base, adapted to be affixed to the mounting surface;
• a rod, comprising a first section and a second section, wherein the first section of the rod pivots on the base;
• a joint unit, disposed on the second section of the rod, wherein the joint unit comprises a plurality of joint-positioning portions, and the joint-positioning portions comprise a first joint-positioning portion and a second joint-positioning portion;
• and
• a mounted member, wherein the mounted member is connected to the joint unit and is adapted to be rotated relative to the joint unit, the mounted member comprises a member housing, the member housing comprises at least one member-positioning portion, and when the mounted member is in a first member orientation relative to the joint unit, the member-positioning portion is wedged into the first joint-positioning portion, and when the mounted member is in a second member orientation relative to the joint unit, the member-positioning portion is wedged into the second joint-positioning portion,
• wherein the joint-positioning portions are holes, the member housing comprises an elastic arm, the member-positioning portion is a protrusion, and the member-positioning portion is formed on a free end of the elastic arm.