Second Affiliated Hospital of Second Military Mediccal University, Shanghai

Da Wang

Jun Wei Zhang

Dan Zhang

Zhiqiang Li

Jianru Xiao

Xinghai Yang

Bowen Yuan

Shaohui He

Haiyi Gong

Fengting Fu

Weihu Fu

Zhipeng Wu

Zhenzhong Chu

Jian Jiao

Fulun Wang

The present invention discloses an underwater transmission device with a lead screw sliding block mechanism, and relates to the technical field of underwater transmission devices. The device comprises a watertight motor and a lead screw sliding block mechanism A detection device is arranged in the watertight motor and comprises a planetary reducer and a rotary transformer. The lead screw sliding block mechanism comprise a base, a lead screw threaded rod and a sliding block. The watertight motor and the lead screw sliding block mechanism of the underwater transmission device with a lead screw sliding block mechanism are integrally designed. Therefore, the device has a compact structure. The rotary transformer can detect the absolute position of the sliding block, and facilitates debugging of the control system of the watertight motor. An instrument device can be fixed to the sliding block to accurately and linearly reciprocate.

Underwater transmission device with lead screw sliding block mechanism

The invention relates to an assembled vertebral body used in a cervical reconstruction operation, comprising: an upper connecting element, an artificial vertebral body element and a lower connecting element, wherein the upper connecting element is disposed at an upper part of the artificial vertebral body element, the lower connecting element is disposed at an lower part of the artificial vertebral body element, and wherein the artificial vertebral body element is assembled with the upper connecting element and the lower connecting element, respectively. The invention has the advantages that the artificial vertebral body element is customized in accordance with the characteristics of patients and printed in 3D, and the length of the artificial vertebral body element can be precisely adjusted to adapt to the patient. Since the lower connecting element is standard part, the upper connecting element is standard part or non-standard part, and the artificial vertebral body element is non-standard part, in comparison to the traditional 3D printing which needs to be printed integrally, the adjustable assembled artificial vertebral body can reduce 3D printing materials and reduce the cost of 3D printing, thus reducing medical costs for the patient. The shape of the nested parts of the elements is a non-circular shape, which can resist rotation, so that no relative movement occurs among the three elements of the artificial vertebral body.

Assembled vertebral body

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Shanghai, China

Da Wang