Premature delivery delaying device

Abstract

The invention discloses a premature delivery delaying device which comprises a plurality of sectioning rings, and the sectioning rings are sequentially arranged in the circumferential direction to form an annular structure. The premature delivery delaying device further comprises fixing rings and connecting pieces, each sectioning ring comprises an upper ring body and a lower ring body, the fixing rings are arranged on the lower ring bodies in a sleeving mode, and the connecting pieces are connected to every two adjacent upper ring bodies. The premature delivery delaying device further comprises a locking structure for locking the positions of the upper ring bodies and the connecting piece, and the locking structure is at least arranged between the connecting piece and one upper ring body connected with the connecting piece. The locking structure is provided with a plurality of locking positions, when the locking structure is located at different locking positions, the inner diameters of the annular structures formed by the upper ring bodies are different, and the locking structure can be automatically adjusted according to cerclage force so that the locking structure can be located at the different locking positions. The device can effectively prevent cervical dilation and thinning and prevent or delay early delivery, can avoid amniotic sac inflammation, and can prevent cerclage force from increasing along with the weight of an infant to damage the cervix and cause discomfort and pain of a patient.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a device for delaying premature delivery. Background Art

[0002] Premature birth is one of the most common complications of the perinatal period. According to the World Health Organization, there are about 15 million premature births each year worldwide, and the proportion of premature babies is 5% to 18%, and this number is still rising; premature birth-related complications are the main cause of death in children under 5 years old, and existing intervention measures based on medical cost-effectiveness can only save three quarters of these deaths.

[0003] In recent years, the incidence of premature birth in my country is about 7%, and it is increasing year by year, which is a social problem that has attracted much attention. In view of the differences in medical conditions and human resources in various parts of my country, the level of treatment of premature birth is also uneven, and premature birth is still the main cause of perinatal morbidity and mortality.

[0004] At present, the effective measures for premature birth mainly include: (1) the use of progesterone; (2) cervical cerclage; (3) cervical pessary. Among them, cervical cerclage is the most effective method for treating cervical insufficiency. It refers to the use of synthetic sutures or synthetic cerclage bands to mechanically increase the tensile strength of the cervix and reduce the incidence of perinatal adverse events related to cervical insufficiency. However, cervical cerclage may cause inflammation of the amniotic sac, which may lead to intrauterine inflammation and fetal death. In severe cases, the uterus needs to be removed to avoid infection. Secondly, cervical cerclage can cause premature rupture of membranes or dystocia, which has a great impact on the body. Thirdly, cervical cerclage can cause bladder and urethra damage, and can also cause cervical laceration.

[0005] Therefore, it is imperative to seek premature birth prevention and treatment devices with better prevention and treatment effects, better economic benefits, simple operation and individualization. Summary of the invention

[0006] The purpose of the present invention is to provide a device for delaying premature delivery which can prevent cervical dilation and thinning and prevent or delay premature delivery in view of the deficiencies in the prior art.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A device for delaying premature delivery comprises a plurality of split-valve rings, wherein the plurality of split-valve rings are sequentially arranged in the circumferential direction to form an annular structure that can be sleeved on the cervix to perform cerclage on the cervix; the device for delaying premature delivery also comprises a fixing ring and a connecting member for connecting the split-valve rings, wherein each split-valve ring comprises an upper ring body and a lower ring body fixedly arranged at the lower part of the upper ring body, the fixing ring is sleeved on each lower ring body, the connecting member is arranged between each two adjacent upper ring bodies, and its two ends are respectively connected to the two adjacent upper ring bodies; the device for delaying premature delivery also comprises a locking structure for locking the relative position between the upper ring body and the connecting member, wherein the locking structure is at least arranged between one end of the connecting member and the upper ring body connected thereto; the locking structure has a plurality of locking positions, and when the locking structure is at different locking positions, the inner diameters of the annular structures formed by the upper ring bodies are different, and the locking structure can automatically adjust the locking structure to different locking positions according to the force applied at the cerclage position.

[0009] In some embodiments, a receiving groove is provided on the upper ring body, and the connecting member has a connecting portion connected to the upper ring body, and the connecting portion can extend into the receiving groove and can move along the length extension direction of the receiving groove, and the locking structure includes a plurality of first teeth sequentially arranged on the connecting portion along the length extension direction of the connecting portion and a second tooth arranged in the receiving groove, and the second teeth can be respectively engaged with each of the first teeth; along the extension direction of the receiving groove, from the outlet of the receiving groove to the inner direction, the tooth height of each of the first teeth gradually increases.

[0010] In some embodiments, the second tooth is disposed at an exit of the receiving groove.

[0011] In some embodiments, each of the first teeth has a first tooth surface and a second tooth surface that are oppositely arranged, and the first tooth surface is facing away from the outlet side of the accommodating groove, and the first tooth surface is an inclined surface; the second tooth has a third tooth surface and a fourth tooth surface that are oppositely arranged, and the third tooth surface faces the outlet side of the accommodating groove, and the third tooth surface is an inclined surface; the third tooth surface is adapted to the first tooth surface.

[0012] In some embodiments, the first teeth are respectively arranged on upper and lower sides of the connecting portion along the length extension direction of the connecting portion, and correspondingly, the second teeth are arranged on upper and lower sides of the accommodating groove.

[0013] In some embodiments, both ends of the connecting member are connected and locked with the corresponding upper ring body through the locking structure;

[0014] Alternatively, one end of the connecting member is connected and locked with the corresponding upper ring body through the locking structure, and the other end of the connecting member is fixedly connected to the upper ring body, or is integrally arranged with the upper ring body.

[0015] In some embodiments, each of the petal rings is provided with an anchoring portion for anchoring the device for delaying premature delivery on the cervix, and the anchoring portion is convex inwardly from the inner circumference of the petal ring.

[0016] In some embodiments, the anchoring portion is respectively disposed on each of the upper ring body and the lower ring body, and is convex inwardly from the inner circumferential surface of the upper ring body and the inner circumferential surface of the lower ring body, respectively.

[0017] In some embodiments, each of the lower ring bodies is provided with a slot penetrating two opposite side surfaces in the circumferential direction of the lower ring body, and the fixing ring is embedded in each of the slots.

[0018] In some embodiments, each of the upper ring bodies is provided with an inclined surface which is inclined downward from the upper end surface and from the outside to the inside, and the inclined surface extends inwardly to the inner circumferential surface of the upper ring body.

[0019] In some embodiments, the device for delaying premature birth has a closed state. When the device for delaying premature birth is in the closed state, adjacent side surfaces of two adjacent upper ring bodies are abutted against each other, and the annular structure formed by the upper ring bodies and the annular structure formed by the lower ring bodies are both columnar; in each of the petal rings, the length of the upper ring body along the circumferential direction is greater than the length of the lower ring body along the circumferential direction, so that when the device for delaying premature birth is in the closed state, there is a spacing distance between adjacent side surfaces of two adjacent lower ring bodies.

[0020] In some embodiments, in each of the split rings, the upper ring body and the lower ring body are integrally arranged.

[0021] In some embodiments, each of the petal rings, the fixing ring and the connecting member is made of elastic material.

[0022] Due to the application of the above technical solution, the device for delaying premature delivery of the present invention has the following advantages compared with the prior art:

[0023] (1) The present invention uses a non-invasive method to place a sleeve on the cervix to perform cerclage on the cervix, which can effectively prevent cervical dilation and thinning, prevent or delay premature delivery, and also avoid inflammation of the amniotic sac;

[0024] (2) The inner diameter of the ring structure for cerclage of the cervix of the present invention can be gradually increased as the baby becomes heavier, so that the cerclage force on the cervix can be kept at a relatively stable force value, which can avoid the cerclage force increasing as the baby becomes heavier, thereby damaging the cervix and causing discomfort and pain to the patient;

[0025] (3) The present invention has a simple structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Attached Figure 1 is a three-dimensional schematic diagram of the device for delaying premature delivery of this embodiment (the device for delaying premature delivery is in a loose state);

[0027] Attached Figure 2 is a three-dimensional schematic diagram of the device for delaying premature delivery of this embodiment (the device for delaying premature delivery is in a closed state);

[0028] Attached Figure 3 is a front view schematic diagram of the device for delaying premature delivery of this embodiment;

[0029] Attached Figure 4 is a cross-sectional schematic diagram of the device for delaying premature delivery of this embodiment;

[0030] Attached Figure 5 It is a three-dimensional schematic diagram of two adjacent petal rings of this embodiment being connected via a connecting piece (one end of the connecting piece is locked and connected to the upper ring body via a locking structure);

[0031] Attached Figure 6 For attachment Figure 5 A front view schematic diagram of the state;

[0032] Attached Figure 7 For attachment Figure 5 A three-dimensional schematic diagram of the first petal ring;

[0033] Attached Figure 8 For attachment Figure 5 A schematic front view of the first petal ring;

[0034] Attached Fig. 9 For attachment Figure 5 A three-dimensional schematic diagram of the second petal ring;

[0035] Attached Fig.10 For attachment Figure 5 A schematic front view of the second petal ring;

[0036] Attached Fig.11 This is an exploded schematic diagram of two adjacent petal rings of this embodiment being connected via a connector (both ends of the connector are locked and connected to the upper ring body via a locking structure);

[0037] Attached Fig.12It is a front view schematic diagram of two adjacent petal rings of this embodiment being connected via a connecting piece (both ends of the connecting piece are locked and connected to the upper ring body via a locking structure).

[0038] Among them: 1. petal ring; 1a. first petal ring; 1b. second petal ring; 11. upper ring body; 111. accommodating groove; 112. second tooth; 1121. third tooth surface; 1122. fourth tooth surface; 113. inclined surface; 12. lower ring body; 121. slot; 13. anchoring part; 2. fixing ring; 3. connecting piece; 31. connecting part; 311. first tooth; 3111. first tooth surface; 3112. second tooth surface. DETAILED DESCRIPTION

[0039] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are based on the directions or positional relationships shown in the accompanying drawings, such as Figure 3 In the figure, the left side direction is "left", the right side direction is "right", the upper side direction is "up", the lower side direction is "down", and the directions perpendicular to the paper plane in the figure are "front" and "back", which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0041] like Figure 1 to Figure 4 As shown, the device for delaying premature delivery of the present invention comprises a plurality of split-valve rings 1, which are sequentially arranged along the circumferential direction to form an annular structure, which can be sheathed on the cervix to perform cerclage on the cervix, thereby preventing cervical dilatation and thinning and preventing or delaying premature delivery. Since a non-invasive cerclage method is adopted, inflammation of the amniotic sac can be avoided.

[0042] like Figure 1 to Figure 4 As shown, the device for delaying premature delivery further includes a fixing ring 2 and a connecting member 3 , and both the fixing ring 2 and the connecting member 3 are used to connect each valve ring 1 .

[0043] Specifically, each petal ring 1 includes an upper ring body 11 and a lower ring body 12 fixedly arranged at the lower part of the upper ring body 1. The fixing ring 2 is sleeved on each lower ring body 12, so that each lower ring body 12 is connected through the fixing ring 2, so that each lower ring body 12 forms an annular structure. The connecting member 3 is arranged between two adjacent upper ring bodies 11, and its two ends are respectively connected to two adjacent upper ring bodies 11, so that each upper ring body 11 also forms an annular structure through the connecting member 3. In this embodiment, the upper ring body 11 and the lower ring body 12 are arranged integrally, which makes the molding process of the petal ring 1 simple.

[0044] The device for delaying premature delivery also includes a locking structure, which is used to lock the relative position between the upper ring body 11 and the connecting member 3, so that the annular structure formed by each upper ring body 11 is stable, so as to effectively cerclage the cervix.

[0045] The locking structure has a plurality of locking positions. When the locking structure is in different locking positions, the inner diameters of the annular structures formed by the upper ring bodies 11 are different, so that the cerclage forces on the cervix are different. The locking structure can automatically adjust the locking structure to different locking positions according to the magnitude of the cerclage force, even if the inner diameters of the annular structures formed by the upper ring bodies 11 are different.

[0046] In this way, when the cervix is ​​cerclaged by the device for delaying premature delivery, as the weight of the baby gradually increases, if the inner diameter of the annular structure formed by each upper ring body 11 remains unchanged, the force on the cerclage site will gradually increase, which may cause damage to the cervix or discomfort to the patient. When the locking structure automatically adjusts the locking position according to the cerclage force, the inner diameter of the annular structure formed by each upper ring body 11 may gradually increase as the weight of the baby increases, so that the cerclage force of the device for delaying premature delivery on the cervix is ​​always maintained at a relatively stable force value, which can prevent the cerclage force from damaging the cervix and causing discomfort and pain to the patient as the baby becomes heavier.

[0047] like Figure 5 to Figure 12 As shown, the upper ring body 11 is provided with a receiving groove 111, and the connecting member 3 has a connecting portion 31 connected to the upper ring body 11, and the connecting portion 31 can extend into the receiving groove 111 and can move along the length extension direction of the receiving groove 111. The locking structure includes a first tooth 311 and a second tooth 112, and a plurality of first teeth 311 are sequentially provided on the connecting portion 31 along the length extension direction of the connecting portion 31, and the second teeth 112 can be respectively engaged with each first tooth 311, and when the second teeth 112 are engaged with different first teeth 311, the locking structure is in different locking positions. Along the extension direction of the receiving groove 111, from the outlet of the receiving groove 111 to the inner direction, the tooth height of each first tooth 311 gradually increases.

[0048] In this way, when the cervix is ​​cerclaged by the device for delaying premature delivery, the inner diameter of the annular structure formed by each upper ring body 11 is relatively small, and the connecting portion 31 is fully or mostly inserted into the receiving groove 111, and the second tooth 112 is engaged with a first tooth 311 closest to the exit of the receiving groove 111, that is, the tooth height of the first tooth 311 is the smallest. When the baby gradually becomes heavier, the force on the cervix due to the cerclage increases. At this time, the first tooth 311 engaged with the second tooth 112 cannot withstand such a large cerclage force and disengages from the second tooth 112, so that the connecting portion 31 moves toward the outside of the receiving groove 111, so that the inner diameter of the annular structure formed by each upper ring body 11 increases until the next first tooth 311 is engaged with the second tooth 112.

[0049] Each first tooth 311 has a first tooth surface 3111 and a second tooth surface 3112 oppositely disposed, wherein the first tooth surface 3111 faces away from the outlet of the receiving groove 111. The second tooth 112 has a third tooth surface 1121 and a fourth tooth surface 1122 oppositely disposed, wherein the third tooth surface 1121 faces the outlet of the receiving groove 111.

[0050] The first tooth surface 3111 is an inclined surface, and the third tooth surface 1121 is also an inclined surface, and the third inclined surface 1121 is matched with the first tooth surface 3111. In this way, when the device for delaying premature delivery is clamped to move the connecting portion 31 in the direction of inserting into the receiving groove 111, the third inclined surface 1121 and the first tooth surface 3111 are matched with each other, so that the connecting portion 31 can be easily inserted into the receiving groove 111, thereby connecting two adjacent upper ring bodies 11 through the connecting member 3, and the annular structure formed by each upper ring body 11 can be contracted.

[0051] The second tooth surface 3112 and the fourth tooth surface 1122 are both straight surfaces, and the locking structure is in a locked state by the abutment between the second tooth surface 3112 and the fourth tooth surface 1122 .

[0052] Preferably, the second teeth 112 are arranged at the exit of the accommodating groove 111. In this way, more first teeth 311 can be designed so that the locking structure has more locking positions, thereby being able to better adjust the cervical cerclage force.

[0053] The first teeth 311 are respectively arranged on the upper and lower sides of the connecting portion 31 along the length extension direction of the connecting portion 31, and correspondingly, the second teeth 112 are arranged on the upper and lower sides of the accommodating groove 111. This makes the force between the upper ring body 11 and the connecting member 3 balanced, and can avoid the problem that the connecting member 3 is twisted and the locking position of the locking structure cannot be automatically adjusted according to the weight of the baby.

[0054] The locking structure is at least arranged between one end of the connecting member 3 and the upper ring body 11 connected thereto.

[0055] In one embodiment, Figures 5 to 10 As shown, one end of the connector 3 is connected and locked with the corresponding upper ring body 11 through a locking structure, and the other end of the connector 3 is fixedly connected to the upper ring body 11, or is integrally arranged with the upper ring body 11. In this way, the upper ring bodies 11 of two adjacent petal rings 1 need to be designed as different structures, namely the first petal ring 1a and the second petal ring 1b. At this time, the total number of petal rings 1 is an even number, and the number of the first petal ring 1a and the second petal ring 1b is the same, and the two are arranged at intervals along the circumferential direction.

[0056] In another embodiment, Fig.11 and Fig.12 As shown, both ends of the connecting member 3 are connected and locked with the corresponding upper ring body 11 through a locking structure. In this way, the structures of the various split-valve rings 1 can be the same, and there is no need to limit the number of split-valve rings 1. This makes the processing technology of the device for delaying premature delivery simple, and when the inner diameter of the annular structure formed by the upper ring body 11 increases with the weight of the baby, since both ends of the connecting member 3 are simultaneously released from the accommodating groove 111, the response speed is faster, and the distribution of the cerclage force on the cervix is ​​more uniform.

[0057] like Figure 1 and Figure 2 As shown, each valve ring 1 is provided with an anchoring portion 13, through which the device for delaying premature delivery can be anchored on the cervix, and the anchoring portion 13 is convex inward from the inner circumference of the valve ring 1. The positioning effect of the device for delaying premature delivery by the anchoring portion 13 is better, which can prevent the device for delaying premature delivery from falling off and avoid the problem of cerclage failure. Moreover, the way of positioning by the anchoring portion 13 can reduce the contact area with the cervix, and can avoid the problem of local cervical blood circulation disorder at the cervical cerclage site.

[0058] In this embodiment, the anchoring part 13 is respectively arranged on each upper ring body 11 and lower ring body 12, and is respectively convex inward from the inner peripheral surface of the upper ring body 11 and the inner peripheral surface of the lower ring body 12. This can better position the device for delaying premature delivery, and also make the force distribution of the cerclage of the cervix of the delaying premature delivery device more uniform, so as to improve the effect of cerclage of the cervix.

[0059] like Figures 1 to 12 As shown, each lower ring body 12 is provided with a clamping groove 121 penetrating through two opposite side surfaces of the lower ring body 12 in the circumferential direction, and the fixing ring 2 is embedded in the clamping groove 121. In this way, the fixing ring 3 can be prevented from slipping off the lower ring body 12, thereby avoiding the problem that the annular structure formed by each lower ring body 12 is loose and the cervix cannot be cerclaged.

[0060] like Figure 1 , Figure 2 and Figure 4As shown, each upper ring body 11 is provided with an inclined surface 113 which is arranged downward from the upper end surface and from the outside to the inside, and the inclined surface 113 extends inward to the inner peripheral surface of the upper ring body 111, and the anchoring portion 13 on the upper ring body 11 is not higher than the inclined surface 113. The inclined surface 113 on each upper ring body 11 forms a bearing surface for bearing a baby.

[0061] The device for delaying premature delivery has a closed state. Figure 2 As shown, when the device for delaying premature delivery is in a closed state, the adjacent side surfaces of the two adjacent upper ring bodies 11 are matched against each other, and the annular structure surrounded by the upper ring bodies 11 and the annular structure surrounded by the lower ring body 12 are both columnar. In each petal ring 1, the length of the upper ring body 11 along the circumferential direction is greater than the length of the lower ring body 12 along the circumferential direction, so that when the device for delaying premature delivery is in a closed state, there is a spacing distance between the adjacent side surfaces of the two adjacent lower ring bodies 12.

[0062] In this way, when the inner diameter of the annular structure formed by each upper ring body 11 gradually increases, the spacing between two adjacent lower ring bodies 12 decreases, so that the lower ring body 12 does not cause a large resistance to the outward expansion of the upper ring body 11. After the inner diameter of the annular structure formed by each upper ring body 11 gradually increases from the closed state, the device for delaying premature delivery forms a conical structure with a larger upper part and a smaller lower part.

[0063] In this embodiment, each petal ring 1, fixing ring 2 and connecting member 3 are made of elastic material, such as each petal ring 1, fixing ring 2 and connecting member 3 can be made of silicone.

[0064] The operation method of the device for delaying premature delivery during cervical cerclage is as follows:

[0065] (1) First, use a speculum to open the vagina and expose the cervix.

[0066] (2) Clamp the cervix with a cervical clamp and place the device for delaying premature delivery in a loose state on the cervix.

[0067] (3) The delayed premature delivery device is compressed by the clamp, so that the delayed premature delivery device in a loose state is contracted to a closed state, thereby clamping the cervix. When the baby gradually becomes heavier, the force on the cervix due to the cerclage becomes larger. At this time, in the delayed premature delivery device, the previous first tooth 311 engaged with the second tooth 112 cannot withstand the large cerclage force and automatically collapses to the next first tooth 311 engaged with the second tooth 112, so that the force at the cerclage is always maintained at a relatively stable force value.

[0068] (4) When the baby is born at full term, the fixing ring 2 and / or the connecting piece 3 are directly cut off to remove the device for delaying premature delivery.

[0069] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for delaying premature delivery, characterized in that: The device comprises a plurality of split-petal rings, which are sequentially arranged in the circumferential direction to form an annular structure that can be sleeved on the cervix to perform cerclage on the cervix; the device for delaying premature delivery also comprises a fixing ring and a connecting piece for connecting each of the split-petal rings, each of the split-petal rings comprises an upper ring body and a lower ring body fixedly arranged at the lower part of the upper ring body, the fixing ring is sleeved on each of the lower ring bodies, the connecting piece is arranged between each two adjacent upper ring bodies, and its two ends are respectively connected to the two adjacent upper ring bodies; the device for delaying premature delivery also comprises a locking structure for locking the relative position between the upper ring body and the connecting piece, the locking structure is at least arranged between one end of the connecting piece and the upper ring body connected thereto; the locking structure has a plurality of locking positions, and when the locking structure is at different locking positions, the inner diameters of the annular structures formed by the respective upper ring bodies are different, and the locking structure can automatically adjust according to the force at the cerclage position so that the locking structure is at different locking positions.

2. The device for delaying premature delivery according to claim 1, characterized in that: A receiving groove is provided on the upper ring body, and the connecting member has a connecting portion connected to the upper ring body, and the connecting portion can extend into the receiving groove and can move along the length extension direction of the receiving groove. The locking structure includes a plurality of first teeth sequentially arranged on the connecting portion along the length extension direction of the connecting portion and second teeth arranged in the receiving groove, and the second teeth can be respectively engaged with each of the first teeth; along the extension direction of the receiving groove, from the outlet of the receiving groove to the inner direction, the tooth height of each of the first teeth gradually increases.

3. The device for delaying premature delivery according to claim 2, characterized in that: The second tooth is arranged at the exit of the accommodating groove.

4. The device for delaying premature delivery according to claim 2, characterized in that: Each of the first teeth has a first tooth surface and a second tooth surface that are oppositely arranged, and the first tooth surface is facing away from the outlet side of the accommodating groove, and the first tooth surface is an inclined surface; the second tooth has a third tooth surface and a fourth tooth surface that are oppositely arranged, and the third tooth surface faces the outlet side of the accommodating groove, and the third tooth surface is an inclined surface; the third tooth surface is adapted to the first tooth surface.

5. The device for delaying premature delivery according to claim 2, characterized in that: The first teeth are respectively arranged at upper and lower sides of the connecting portion along the length extension direction of the connecting portion, and correspondingly, the second teeth are arranged at upper and lower sides of the accommodating groove.

6. The device for delaying premature delivery according to any one of claims 1 to 5, characterized in that: Both ends of the connecting piece are connected and locked with the corresponding upper ring body through the locking structure; Alternatively, one end of the connecting member is connected and locked with the corresponding upper ring body through the locking structure, and the other end of the connecting member is fixedly connected to the upper ring body, or is integrally arranged with the upper ring body.

7. The device for delaying premature delivery according to claim 1, characterized in that: Each of the petal rings is provided with an anchoring portion for anchoring the device for delaying premature delivery on the cervix, and the anchoring portion is convex inwardly from the inner circumference of the petal ring.

8. The device for delaying premature delivery according to claim 7, characterized in that: The anchoring parts are respectively arranged on each of the upper ring body and the lower ring body, and are respectively convex inwardly from the inner peripheral surface of the upper ring body and the inner peripheral surface of the lower ring body.

9. The device for delaying premature delivery according to claim 1, characterized in that: Each of the lower ring bodies is provided with a clamping groove penetrating two opposite side surfaces in the circumferential direction of the lower ring body, and the fixing ring is embedded in each of the clamping grooves.

10. The device for delaying premature delivery according to claim 1, characterized in that: Each of the upper ring bodies is provided with an inclined surface which is inclined downward from the upper end surface and from the outside to the inside, and the inclined surface extends inwardly to the inner peripheral surface of the upper ring body.

11. The device for delaying premature delivery according to claim 1, characterized in that: The device for delaying premature birth has a closed state. When the device for delaying premature birth is in the closed state, adjacent side surfaces of two adjacent upper ring bodies are abutted against each other, and the annular structure formed by the upper ring bodies and the annular structure formed by the lower ring bodies are both columnar; in each of the petal rings, the length of the upper ring body along the circumferential direction is greater than the length of the lower ring body along the circumferential direction, so that when the device for delaying premature birth is in the closed state, there is a spacing distance between adjacent side surfaces of two adjacent lower ring bodies.

12. The device for delaying premature delivery according to claim 1, characterized in that: In each of the petal rings, the upper ring body and the lower ring body are integrally arranged.

13. The device for delaying premature delivery according to claim 1, characterized in that: Each of the petal rings, the fixing ring and the connecting piece is made of elastic material.

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