The application provides a measuring device, and relates to the technical field of optical detection.The measuring device comprises a support
assembly, an auxiliary
assembly and a detection mechanism.The support
assembly comprises a first support frame and a second support frame arranged oppositely; the auxiliary assembly is arranged on the first support frame; at least one avoiding hole is arranged on a fixed plate in the auxiliary assembly; when a contact is placed on the fixed plate, and a weak boundary area of the contact is arranged opposite to the avoiding hole; the detection mechanism comprises an upper
light source assembly, a lower
light source and a
visual detection assembly; the upper
light source assembly and the
visual detection assembly are arranged on the second support frame; the upper light source assembly is arranged between the auxiliary assembly and the
visual detection assembly; the lower light source is arranged on the first support frame and below the fixed plate; and the light of the lower light source can irradiate to the weak boundary area of the contact through the avoiding hole.The measuring device can improve the image definition when detecting the defects of the contacts of
Bluetooth earphones, thereby improving the reliability of the detection result.