Press-fitting mechanism for metal cylinder

Abstract

The invention provides a press-fitting mechanism for a metal cylinder, belongs to the technical field of pH electrode catheter forming and solves the problems that an existing metal cylinder is fixedto the pH electrode catheter by gluing, and the product quality is poor and unsmooth. The press-fitting mechanism for the metal cylinder comprises a bottom plate, a supporting structure arranged on the bottom plate, and an extrusion die I and an extrusion die II which are arranged in the supporting structure, wherein the side, facing the extrusion die II, of the extrusion die I is provided with aforming hole I for inwards curling the first end of the metal cylinder, the bottom of the forming hole I is coaxially provided with a through hole I, the extrusion die II is provided with a forming hole II for inwards curling the second end of the metal cylinder, the bottom of the forming hole II is coaxially provided with a through hole II, and a driving structure for driving the extrusion die Iand the extrusion die II to move relative to each other is arranged in the supporting structure. An impedance ring can be formed on the catheter quickly, and the press-fitting mechanism has the advantages of high efficiency, wide application range, stable and reliable quality of the molded product, and the like.

Description

technical field [0001] The invention belongs to the technical field of forming pH electrode conduits, and relates to a press-fitting mechanism for a metal cylinder, in particular to a press-fitting mechanism for press-fitting a thin-walled metal cylinder onto a pH conduit. Background technique [0002] With the development of medical devices, the demand for impedance-pH electrode catheters for esophageal pH monitoring is increasing day by day, and the demand for the production capacity of impedance-pH electrode catheters is relatively large. In order to improve the quality of the impedance-pH electrode catheter, a Chinese patent discloses a new type of medical pH electrode catheter [the application publication number is CN107752983A], which includes a catheter, an impedance ring and an insulated wire. The catheter is a hollow tube, and the insulated wire is set In the pipe body, the impedance ring is set at a predetermined position of the pipe body, and a lead hole is opened...

AI Technical Summary

Problems solved by technology

But it has the following problems: the method of applying glue takes a long time and the work efficiency is low; when the catheter is bent, the glued position is easy to crack, the resistance ring has the risk of slipping, and the product quality is poor; because the inner diameter of the resistance ring needs to be slightly larger than that of the catheter Outer diameter, a step is formed between the impedance ring and the catheter, which is not smooth during use and is easy to damage human tissue

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