Protective frame for mobile phone camera

A protective frame for mobile phone camera, comprising:

• a lower frame fixedly mountable on a mobile phone case;
• and
• an upper frame connected to the lower frame through a hinge structure;
• wherein the hinge structure comprises:
• a shaft positioning block arranged on the lower frame, and having a hollow channel extending through and along a longitudinal direction of the shaft positioning block;
• a shaft sleeve having an axial channel;
• a pair of shaft brackets arranged on the upper frame, each having a shaft hole;
• and
• a first pivot shaft having a front end;
• wherein the shaft sleeve further comprises a positioning strip protruded from its outer circumferential wall and the hollow channel has a positioning groove recessed from its inner circumferential wall, the positioning groove being configured to couple to the positioning strip such that the shaft sleeve can be assembled in the hollow channel in a detachable manner;
• and
• wherein the front end of the first pivot shaft is configured to pass through at least one of the shaft holes and inserted into the axial channel by means of transition fit such that the upper frame is rotatable about the hinge structure while capable to maintain a stable state when the upper frame is flipped relative to the lower frame at a desired angle to act as a supportive stand for positioning the phone.