Metal shell structure of implantable medical device and forming method

Abstract

The invention discloses a metal shell structure of an implantable medical device and a forming method, and relates to the field of medical instruments. The metal shell structure comprises a lower shell used for containing a battery and a PCBA module and an upper shell in sealing fit with the lower shell; the outer contour of the upper shell and the outer contour of the lower shell are in irregular shapes defined by arc sections and straight line sections; a convex spigot structure shrinking inwards is arranged at an opening of the lower shell; and the opening of the upper shell is arranged on the convex spigot structure of the lower shell in a sleeving manner and then sealed through laser welding. A female die, a pre-necking die and a necking forming die used for forming of the lower shell are further designed, the brand-new lower shell forming method is adopted, the operation steps are simple, the positioning frequency is small, and high forming efficiency and precision are achieved. By means of the manufactured convex spigot structure of the lower shell, the strength of the necking portion of the lower shell can be improved, positioning and assembling of the upper shell and the lower shell are facilitated, and meanwhile lasers can be prevented from penetrating through gaps.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a metal shell structure and a forming method of an implanted medical device. Background technique [0002] At present, an implantable medical device is a medical device installed inside the human body, and is widely used in the diagnosis or treatment of heart system diseases and nervous system diseases. For example, medical devices for treating heart diseases are called pacemakers and defibrillators, and medical devices for treating neurological diseases are called neurostimulators. [0003] Usually, this type of implantable medical device is composed of two parts: electrode connection terminal and metal shell assembly. The two components are generally bonded into a whole by silicone or epoxy glue. [0004] In terms of material selection, the material of the electrode connection end is generally selected from biocompatible polymer materials; the material of metal shell components...

AI Technical Summary

Problems solved by technology

[0010] The invention provides a metal shell structure and a molding method of an implantable medical device, which replaces the structure of a traditional metal shell with a separate barrier belt by designing a necking structure on the shell with an irregular contour, effectively solving the problem of Disadvantages of separate barrier strips are difficult to form, difficult to process, low positioning accuracy, and difficult to weld

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