CN2253192Y

CN2253192Y - Marmen wire intrauterine device

Info

Publication number: CN2253192Y
Application number: CN 95225965
Authority: CN
Inventors: 林秀瑜; 荆艳; 林秀丽; 林秀红; 林志春
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-12-15
Filing date: 1995-12-15
Publication date: 1997-04-30
Anticipated expiration: 2005-12-15

Abstract

The utility model relates to a shape memory alloy wire intrauterine device belonging to the female intrauterine utensil. The structure appearance forms a V shape and a Y shape, and the utility model is made of memory alloy wires. Both ends A and B of the V shape and the Y shape form inward or outward rolling ring shapes; end heads are in slide treatment and is pointed to a symmetrical centre line; the bottom ends of the V shape and the Y form circular arc shapes; the two edges can be straight lines or smooth curve lines or the combination of the straight lines and the smooth curve lines. The intrauterine ring has the characteristics of material special functions and structures, and has the advantages of simple structure, big elasticity, light weight, long service life, firmness, comfortable use, good intrauterine effect, etc.

Description

The shape-memory alloy wire birth control apparatus

The shape-memory alloy wire birth control apparatus belongs to women's birth control utensil.

Now the uterine cavity birth control apparatus kind used of women is more, plastics are arranged, and metal is arranged, and has the two bonded, and is different.The metal contraceptive device of large usage quantity, how with tinsel coiled spring tubulose, the piped metal tube silk of reuse spring makes the birth control apparatus of different shapes such as circular or triangle.But more existing birth control apparatus are because material property is not good enough, and structure is reasonable inadequately, exists certain deficiency, and the expulsion rate and the pregnancy rate that have are higher, and it is on the high side that causing of having bled, have yielding even get the ring fracture, and the use that has is uncomfortable or the like.

The purpose of this utility model is for overcoming the above-mentioned shortcoming that existing uterine cavity birth control apparatus exists, a kind of high performance memory alloy wire birth control apparatus being provided.

Realize that the above-mentioned purpose technical scheme is: a kind of shape-memory alloy wire birth control apparatus, adopt the brand new design of similar " V ", " Y " shape, the A of its V, Y shape, B two ends turnup circlewise, the slick and sly processing in its termination also pointed to symmetrical center line CD, the C place is circular-arc.

Two limits of said V, Y shape birth control apparatus can be straight line or smoothed curve, or the combining of straight line and smoothed curve.

The annular that said V, Y shape ends A, B turnup become inwardly turnup circlewise or outside turnup circlewise.

Further specify technique scheme below in conjunction with accompanying drawing.At first, determine some parameter of shape-memory alloy wire, as warm phase, diameter etc. by the serviceability requirement.Be shaped on mould with it then,, and carry out necessary heat treatment, it can be worked under superelastic or remember condition as V, the Y shape of Fig. 1, Fig. 2, Fig. 3, Fig. 4.Increase copper ion as need, can carry out local copper facing to its copper facing or at A and B portion.Certainly for the marmem of cuprio or cupric composition, then can economize this operation.Because marmem is to responsive to temperature and stable, so under personal temperature, can present its some properties fully.In the time of can making it that even wriggling and bigger deformation are arranged in uterine cavity faster as super-elasticity, also still can keep service life very long or use repeatedly; Elastic force and deformation restoring force are stronger, can make that its material therefor is few, in light weight, difficult drop-off, be difficult for bleeding.In addition, it simple in structure, moulding is reasonable, makes it to wear no sense of discomfort, and contraceptive effect is good.

The C place of this birth control apparatus is circular-arc.A, B two ends turnup circlewise, inside turnup (as the form of Fig. 2 and Fig. 4), also outside turnup (as the form of Fig. 1 and Fig. 3).A, B place can become a circle or a multi-turn by turnup, as when be multi-turn, as shown in Figure 5, its end latter end G should bending in circle.Equally, for fear of scratching the palace wall, all should slick and slyly handle as M among Fig. 2 and N two terminations of birth control apparatus, deburring or put round end with plastic or other material, and all point to symmetrical center line CD.Its two limit AC and BC can be straight line, also can be smoothed curve or its two combination.

The uterine cavity birth control apparatus that adopts this programme to make has following effect: 1. simple in structure, moulding is reasonable, uses comfortable, not hemorrhage.2. elastic force is big, and available less material obtains bigger support force, and difficult drop-off is difficult for conceived.3. deformation restoring force is strong, even deformation 1,000,000 times, function is still constant, as long as one meet human body temperature, recovers as before immediately.Therefore, can repeatedly use repeatedly for a long time, the life-span is long, and birth control is reliable.4. intensity is good, and the plastic-less deformation is not ruptured, and does not have dangerous.5. it is convenient to get ring, just in case operating difficulties occurs, as long as inject cold water or cryogenic liquid to uterine cavity, shape-memory alloy wire will soften automatically, and makes its smooth taking-up.

Embodiment below in conjunction with description of drawings this programme: Fig. 1 and Fig. 3 are V, Y shape two ends A, the outside turnup of B structure circlewise; Fig. 2 and Fig. 4 are V, Y shape two ends A, the inside turnup of B structure circlewise, and Fig. 5 is the E of Fig. 1, the cutaway view of F; Fig. 6 and Fig. 7 are that afterburning sketch was as the front indication when birth control apparatus was put into rotator.1 is the shape-memory alloy wire birth control apparatus among the figure, and 2 is tailfiber, and 3 is placement device, and 4 is solid push rod.A and B are V, Y shape birth control apparatus both ends, and M and N are the termination at A, B place, and DC is the symmetrical center line of V, Y shape birth control apparatus, and C is circular-arc termination, bottom.Embodiment 1: select for use diameter to be 0.5 the niti-shaped memorial alloy silk, by die forming shown in Figure 1.Wherein, A and B part are enclosed excurvation termination, and copper facing around three.Get high temperature and be not higher than 33 ℃ mutually, low temperature is not less than 10 ℃ mutually, utilizes superelastic section work, finalizes the design, remembers processing.Embodiment 2; Select for use diameter to be

0.5 NiTi copper ternary shape memory alloy silk, press Fig. 2 die forming, not copper facing utilizes the work of memory section, all the other are described with example 1, embodiment 3; Select for use diameter to be

0.8 copper base shape memory alloy wire, by die forming shown in Figure 4.Wherein, A and B part is put round end around 1 circle and in the termination with plastics, not copper facing utilizes super bullet section work, all the other together enforcement you are 1 described.Certainly, they should carry out necessary disinfecting by medical instructions for use before use.Put into the method for placement device for birth control apparatus, when its top A and B annulus circle turned up, it added force direction shown in front among Fig. 6, promptly with two fingers simultaneously to centrage CD pressuring direction, tailfiber pulls down and gets final product simultaneously.When turning in its top A and the B annulus circle, only spur tailfiber downwards and get final product, as Fig. 7 arrow points.Certainly, as be reluctant to adopt the tailfiber structure, then available two fingers are exerted pressure its placement device of packing into.

Claims

1. a memory alloy wire birth control apparatus is characterized in that the similar V of planform, Y shape, the A of V, Y shape and B two ends turnup circlewise, the slick and sly processing in its termination also pointed to symmetrical center line CD, the C place is circular-arc.

2. a kind of memory alloy wire birth control apparatus according to claim 1 is characterized in that two limits of said V, Y shape birth control apparatus are straight line or smoothed curve, or the combining of straight line and smoothed curve.

3. a kind of memory alloy wire birth control apparatus according to claim 1 and 2 is characterized in that annular that said V, Y shape A, B two ends turnup become is that circlewise or outwards turnup is circlewise for inside turnup.