Head-mounted display device and external mounting type adjusting module

The invention discloses a head-mounted display device and an external mounting type adjusting module. The head-mounted display device comprises a body and an external mounting type adjusting module. The body is provided with a first lens, a second lens and a driven mechanism, the first lens and the second lens are respectively coupled to the driven mechanism. The external mounting type adjusting module comprises a driving part and a transmission part. The transmission member is assembled to the driving member and is used for being coupled to the driven mechanism. The driving part is used for driving the driven mechanism through the transmission part so as to adjust the distance between the first lens and the second lens. 本发明公开一种头戴式显示设备与外挂式调整模块。头戴式显示设备包括本体与外挂式调整模块。本体具有对应双眼的第一透镜与第二透镜，还具有从动机构。第一透镜与第二透镜分别耦接至从动机构。外挂式调整模块包括驱动件与传动件。传动件组装至驱动件且用以耦接至从动机构。驱动件用以通过传动件驱动从动机构，以调整第一透镜与第二透镜之间的距离。