Manufacturing method of involvement type probe body

Abstract

The invention relates to a manufacturing method of an involvement type probe body. The manufacturing method of the involvement type probe body is characterized in that the involvement type probe body comprises a sphere guiding end arranged at the front end of the probe body, a probe body front section connected with the sphere guiding end and a probe body rear section, a probing cavity is arranged above the probe body front end, a positioning groove is formed at the bottom face below the probing cavity in the axial direction, the probe body rear section is in a pipe shape, and the sphere guiding end, the probe body front section and the probe body rear section are connected in sequence to be integrated; during manufacturing, the three parts, including the sphere guiding end, the probe body front section and the probe body rear section are machined and formed respectively, and then the three parts are welded to be integrated. According to the manufacturing method of the involvement type probe body, the technology is simple, manufacturing is easily conducted, and the machining cost of the involvement type probe body is lowered; moreover, the machining precision is high, the machined probing cavity and the positioning groove are high in structural precision, the positioning performance is stable, assembly of sensing elements is facilitated, and the machining quality of the involvement type probe is effectively improved.

Description

technical field [0001] The invention relates to a manufacturing method of an interventional probe body, which belongs to the technical field of interventional medical devices. Background technique [0002] The pressure and temperature data in the human body are important parameters clinically used to monitor the vital signs of patients. The measurement of these parameters is an important means of disease diagnosis and treatment. Among them, the intrusive measurement method using the intrusive microelectronic sensor probe has the advantages of accurate measurement, strong anti-interference, and continuous monitoring. Interventional microelectronic sensor probes are measured by installing microelectronic pressure and temperature sensing elements on the interventional probe body, which can provide important guidance for the diagnosis and treatment of patients' conditions and are widely used clinically. [0003] The interventional probe is composed of the probe body and the mi...

AI Technical Summary

Problems solved by technology

However, the external dimensions of the interventional probe body are small, and it is very difficult to process the above-mentioned positioning structure in the probe body of such a small size.

[0004] There are mainly two methods for making the body of the interventional probe: first, the capillary tube is used as the raw material for processing, and the detection window is cut out on the side wall of the tube. In the actual assembly process of the interventional probe, the sensing element is fixed. In the detection window, due to the miniaturization and high precision of the probe, the cut window lacks a groove positioning structure for effectively positioning the sensing element during operation, and the sensing element will move randomly during the assembly process , the operation efficiency is low. If the groove positioning structure is to be processed, the method of EDM is used. The method of EDM is to use the heat energy generated by the spark discharge between the tool electrode and the workpiece to melt the part to be processed, so as to achieve the purpose of forming , There are obvious tumors in the groove processed by this method. The existence of tumors will make the surface of the groove uneven. If the tumor is removed, follow-up processing is required, which is difficult and the quality is difficult to guarantee.

What needs to be explained is that since the wall thickness of the capillary tube used is very small, the width of the positioning platform of the processed groove will also be small. During the assembly process, the sensing element is easy to slip off from the positioning platform, which cannot to effectively position the sensing element

Second, the bar is used as the raw material, and the processing method of mechanical integral molding is used. The groove of the probe and other hole-shaped parts need to be processed with different micro-milling cutters or turning tools. The processing procedure is complicated and the requirements for the cutting tools are also very high. ; Moreover, rounded corners will be formed at both ends of the groove, which not only affects the assembly of the sensing element, but also increases the production cost. If this rounded corner is to be removed, additional processing technology is required

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