The invention relates to the technical field of
medical equipment, in particular to a
penis size measuring method and device based on gravity driving, and the device comprises a measuring cylinder, the upper end of the measuring cylinder is provided with an arc-shaped fitting part matched with the
sacrum of a child, and the front end of the measuring cylinder is provided with an elliptical accommodating space matched with the
scrotum of the child; according to the
penis size measuring method and device based on gravity driving, through an original
human body adaptive positioning structure,
length measurement adopts a mode of driving a sliding block to slide naturally by gravity, and perimeter measurement adopts uniform pull-back force provided by a spring and is assisted by preset marking points, so that the length and perimeter of the
penis can be measured more accurately. According to the device, the length measuring function and the perimeter measuring function are integrated, in the aspect of safety, all parts making contact with the
human body are designed in an arc transition mode, the overall structure is compact and simple, the size is small, carrying and storage are convenient, the design is suitable for the whole
development period of children and teenagers of 3-18 years old, and in addition, the device does not need complex electronic elements and is simple in structure.