Intrauterine device support

Abstract

An intrauterine device support is made of a metal wire; metal parts are press-fitted to two ends of the metal wire; one end of the metal wire is provided with grooves. The risk of the metal parts dropping from the support are decreased in two aspects: 1), the surface of the support is of concave-convex design, adding more friction between the support and the metal parts and increasing initial binding force between the metal parts and the support; 2) under the action of uterine liquid, the metal parts and the support form a bimetal galvanic corrosion system, the metal parts serving as anodes increase in corrosion speed at the parts in contact with the support, and the corrosion speed is related to the magnitude of galvanic current. One end of the metal wire of the intrauterine device support is provided with the grooves, which add enlarged contact area for the support with the metal parts, the galvanic current is decreased, the corrosion speed of the metal parts at the parts in contactwith the support decrease, and therefore, decrease in the binding force is retarded.

Description

technical field [0001] The invention relates to a contraceptive device, in particular to an intrauterine contraceptive device. Background technique [0002] Most of the intrauterine devices are made of stainless steel wire or TiNi shape memory alloy wire to make the bracket. The end of the bracket is generally made of spring-wound screw connection, hook butt joint, silicone sleeve, pressed silicone block or pressed metal parts (mainly copper particles). ) way to deal with. [0003] Among them, the processing method of pressing metal parts is generally to pass the end of the bracket into the hole of the metal part, and press the bracket and the metal part together by stamping, so that the metal part is difficult to fall off from the bracket, but intrauterine birth control After the device is placed in the uterus, under the action of intrauterine fluid, the metal parts and the stent are corroded, the bonding force between the two gradually decreases, and the risk of the metal...

AI Technical Summary

Problems solved by technology

[0003] Among them, the processing method of pressing metal parts is generally to pass the end of the bracket into the hole of the metal part, and press the bracket and the metal part together by stamping, so that the metal part is difficult to fall off from the bracket, but intrauterine birth control After the device is placed in the uterus, the metal parts and the stent will be corroded under the action of the intrauterine fluid, the bonding force between the two will gradually decrease, and the risk of the metal parts falling off the stent will gradually increase

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