The invention belongs to the technical field of medical devices, and particularly relates to an electrically-driven
vaginal speculum capable of expanding uniformly. The device comprises an
insertion mechanism which is a cylindrical body formed by a supporting rod, an elastic
inner membrane and a permeable outer membrane and is used for circulating and permeating lubricating liquid; the driving mechanism comprises a shell, a propelling cylinder, a stepping motor, a
crank connecting rod, a sliding block, a sliding rail and the like and is used for controlling the
insertion mechanism to radially and uniformly expand and contract; the
temperature control mechanism comprises an annular
metal pipe, a temperature sensor, a
heating element and the like and is used for regulating and controlling the temperature of the lubricating liquid in the annular
metal pipe to enable the temperature of the lubricating liquid to be matched with the
human body temperature; the illumination mechanism is fixed to the outer side of the shell of the driving mechanism and used for illuminating the cervical opening and the
vaginal wall. The
vagina can be radially and uniformly opened, and discomfort of a patient is reduced; the
distraction degree can be adjusted to adapt to
vagina sizes of different patients; lubricating liquid is provided in the operation process, so that friction and pain are reduced; the temperature of the lubricating liquid is maintained near body temperature, and stimulation response of low temperature to patients is reduced.