Membrane rupture device for obstetrical department

Abstract

The invention discloses an obstetrical membrane rupture device, and belongs to the technical field of medical instruments, the obstetrical membrane rupture device comprises a sleeve, the end of the sleeve is hinged to a cover body mechanism, the interior of the sleeve is in threaded connection with a pushing mechanism, and the pushing mechanism and the interior of the sleeve are in sliding connection with an extraction mechanism; the device comprises a sleeve, a pulling mechanism is arranged in the sleeve, an expanding mechanism is slidably connected in the sleeve, the pushing mechanism is used for pushing the pulling mechanism and the expanding mechanism in the sleeve, a limiting mechanism is slidably connected to the surface of the pulling mechanism, and the limiting mechanism is used for disassembling the pulling mechanism in the pushing mechanism and the expanding mechanism. A limiting mechanism enables the extraction mechanism to be detachable in the sleeve, the extraction pipe can be moved out of a third through hole and a through groove by pushing a pushing ring front and back, an amniotic fluid sample in the extraction pipe can be independently transferred, the sleeve is prevented from being transferred together, and therefore the risk of cross infection is reduced, and the safety of membrane rupture work is improved.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to an obstetric membrane rupture device. Background Technology

[0002] Artificial rupture of membranes refers to the puncture of the amniotic sac with instruments or needles, allowing amniotic fluid to flow out, changing the volume of the uterine cavity, and initiating uterine contractions due to changes in uterine dynamics. After rupture of membranes, uterine contractions intensify, the descent of the fetal head accelerates, and the increased pressure of the fetal head on the cervix reflexively increases prostaglandins. At the same time, it stimulates the nerve plexus surrounding the cervix, increasing the release of oxytocin, further strengthening uterine contractions and shortening the labor process.

[0003] Existing amniotic rupture devices typically employ an integrated design, fixing the rupture needle and the extractor (such as a syringe) together as a single unit. During operation, medical personnel push the rupture needle to pierce the amniotic membrane, creating a puncture hole, and then pull the piston rod to extract amniotic fluid samples using negative pressure. However, this integrated structure has significant drawbacks: after amniotic fluid extraction, if the sample needs to be transferred to testing equipment or a storage container, the entire rupture device (including external structures that may come into contact with contaminants) must be moved. During this process, due to the large length of the device and limited operating space, it is highly susceptible to splashing of residual amniotic fluid from the syringe due to hand shaking or collisions. Furthermore, the integrated design of the device also presents potential blind spots during cleaning and disinfection, and repeated use may result in pathogen residue.

[0004] Therefore, there is an urgent need to provide an obstetric membrane rupture device to solve the above problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an obstetric membrane rupture device.

[0006] The technical solution adopted to solve the above technical problems is: to provide an obstetric membrane rupture device, including a sleeve, a cover mechanism hinged to the end of the sleeve, a propulsion mechanism threaded inside the sleeve, and further comprising; The propulsion mechanism is slidably connected to the inside of the sleeve by an extraction mechanism, which is used for amniotic fluid extraction. The sleeve is slidably connected to a spreading mechanism, which is used to spread the cover mechanism open. The propulsion mechanism is used to propel the extraction mechanism and the spreading mechanism inside the sleeve. The cover mechanism is used to protect the extraction mechanism. The extraction mechanism is slidably connected to a limiting mechanism, which is used to disassemble the extraction mechanism inside the propulsion mechanism and the spreading mechanism.

[0007] The present invention is further configured such that: a first fixing block and a second fixing block are fixedly installed inside the sleeve; a first through hole is opened on the surface of the first fixing block; a second through hole is opened on the surface of the second fixing block; a first spring is fixedly connected to the surface of the second fixing block; a symmetrical arc-shaped groove is opened on the surface of the sleeve; and a threaded groove is opened on one side of the sleeve.

[0008] Through the above technical solution, a cavity is formed between the first fixed block and the second fixed block for the movement of the moving block. The inner diameter of the first through hole is larger than the outer diameter of the screw for the sliding of the screw. The inner diameter of the second through hole is larger than the outer diameter of the needle for the sliding of the needle. When the membrane is broken, the first spring is in a compressed state. After the membrane is broken, the first spring rebounds and the moving block returns to its initial position to wait for the next use. The arc groove is used for the movement of the connecting rod, and the threaded groove is used for the rotation of the screw.

[0009] The invention is further configured such that: the cover mechanism includes an upper cover and a lower cover, both of which are hinged to the end of a sleeve; symmetrical extension plates are fixedly installed on the surfaces of both the upper and lower covers; a connecting rod is fixedly connected between the two extension plates; the connecting rod is slidably connected inside an arc-shaped groove; an iron block is fixedly installed at one end of the upper cover; and a magnet is fixedly installed at one end of the lower cover; the magnet and the iron block are movably fitted together.

[0010] With the above technical solution, the cover mechanism is initially in a closed state, which facilitates the overall insertion of the device into the birth canal. When the membrane is broken, the moving block moves forward, causing the triangular block to squeeze the connecting rod. The connecting rod rotates inside the arc groove, further causing the upper cover and lower cover to rotate and separate. The cover mechanism opens, which facilitates the needle to break the membrane. After the membrane breaking is completed, the moving block moves backward. Through the mutual attraction between the magnet and the iron block, the upper cover and lower cover fit together, and the cover mechanism closes again.

[0011] The present invention is further configured such that: the propulsion mechanism includes a screw, the screw is threadedly connected inside a threaded groove, a rotating handle is fixedly installed on the surface of the screw, and through grooves are opened inside both the screw and the rotating handle, and the screw is slidably connected inside a first through hole.

[0012] With the above technical solution, when the membrane breaking work is required, the screw is rotated by rotating the handle. The screw moves forward inside the sleeve, and the front end of the screw is in contact with the surface of the moving block, thereby driving the moving block to move forward, further enabling the extraction mechanism to break the membrane, and at the same time enabling the spreading mechanism to spread the upper cover and lower cover apart.

[0013] The present invention is further configured such that: the extraction mechanism includes an extraction tube, the extraction tube is slidably connected inside the through groove, a piston rod is slidably connected inside the extraction tube, and a needle is fixedly connected to the end of the extraction tube, the needle being slidably connected inside the second through hole.

[0014] With the above technical solution, when the moving block moves forward inside the sleeve, the extraction tube and needle move accordingly. After the needle breaks the membrane, the piston rod is pulled to extract the amniotic fluid sample, and the extracted amniotic fluid is stored inside the extraction tube.

[0015] The present invention is further configured such that: a symmetrical receiving groove is formed on the surface of one end of the extraction tube, a symmetrical sliding groove is formed inside the extraction tube, and a symmetrical clearance groove is formed on the surface of the other end of the extraction tube.

[0016] Through the above technical solution, the storage groove is used for the temporary storage of the limiting plate, the sliding groove is used for the stable movement of the sliding plate, and the clearance groove provides space for the movement of the support rod.

[0017] The present invention is further configured such that: the spreading mechanism includes a movable block, the movable block is slidably connected between a first fixed block and a second fixed block, the other end of the first spring is fixedly connected to the surface of the movable block, and one end of the screw is movably fitted to the surface of the movable block.

[0018] With the above technical solution, when the screw rotates, the extrusion moving block moves inside the first fixed block and the second fixed block, thereby performing the film breaking work.

[0019] The invention is further configured such that: a third through hole is provided on the surface of the movable block, the extraction tube is slidably connected inside the third through hole, a symmetrical connecting plate is fixedly installed on the surface of the movable block, a triangular block is fixedly installed at the end of the connecting plate, the connecting rod is movably fitted with the inclined surface of the triangular block, a gap is formed between the surface of the second fixed block and the inner wall of the sleeve, and the connecting plate is slidably connected inside the gap.

[0020] With the above technical solution, the third through hole is used for the movement of the extraction tube. When the moving block moves, the connecting plate and the triangular block move forward at the same time. The triangular block squeezes the connecting rod, causing the connecting rod to rotate. The upper cover and the lower cover separate, providing space for the needle to break the membrane. The gap provides space for the movement of the connecting plate.

[0021] The present invention is further configured such that: the limiting mechanism includes a pushing ring, the pushing ring is slidably connected to the surface of the extraction tube, the surface of the pushing ring is fixedly connected to symmetrical support rods, the end of the support rods is fixedly mounted with a sliding plate, the end of the sliding plate is fixedly mounted with a plurality of first teeth, the end of the sliding plate is fixedly mounted with a second spring, the other end of the second spring is fixedly connected to the inner wall of the slide groove, the inside of the receiving groove is rotatably connected to a limiting plate, the surface of the limiting plate is fixedly mounted with a plurality of second teeth, the second teeth are ring-shaped, and the first teeth mesh with the second teeth.

[0022] The above technical solution involves pushing the push ring forward on the surface of the extraction tube, causing the support rod to move the sliding plate inside the groove. The second spring is compressed, and through the meshing of the first and second teeth, the limiting plate rotates from a vertical state to a horizontal state and is retracted into the receiving groove. The extraction tube, now cylindrical, is inserted into the through groove and the third through hole. When the front end of the extraction tube moves to the front of the third through hole, the push ring is released, the second spring rebounds, causing the push ring to move backward. Simultaneously, the sliding plate moves backward inside the groove, and the limiting plate rotates from the receiving groove, changing from a horizontal state to a vertical state and fitting against the surface of the moving block. As the moving block moves forward, it drives the extraction tube forward, allowing the needle to perform the membrane rupture operation. After the amniotic fluid sample is extracted, the push ring is pushed again, and the limiting plate is retracted back into the receiving groove, allowing the extraction tube to be removed from the through groove and the third through hole, thus separating the extraction tube from the sleeve.

[0023] The present invention is further configured such that: the sliding plate is slidably connected inside the slide groove, the support rod is slidably connected inside the clearance groove, and the limiting plate is movably attached to the surface of the moving block.

[0024] Through the above technical solution, the slide provides space for the movement of the skateboard, making the skateboard more stable when moving, and the clearance groove provides space for the movement of the support rod.

[0025] The beneficial effects of this invention are as follows: 1. The present invention is provided with a limiting mechanism, which enables the extraction mechanism to be detached inside the sleeve. By pushing the pushing ring back and forth, the extraction tube can be moved out from the third through hole and through groove. The amniotic fluid sample inside the extraction tube can be transferred separately, avoiding the transfer of the sleeve together, thereby reducing the risk of cross-infection and improving the safety of membrane rupture. 2. The present invention is equipped with a propulsion mechanism, which is equipped with a screw. The screw squeezes the moving block forward, which in turn drives the needle to move forward to perform the membrane breaking work. The operation is simple and improves the efficiency of membrane breaking work for novices. 3. The present invention is provided with a spreading mechanism and a cover mechanism. When the moving block moves forward, the upper cover and the lower cover are separated by the contact between the triangular block and the connecting rod, providing space for the needle to break the membrane. After the membrane breaking work is completed, the moving block moves backward, and the upper cover and the lower cover are put together by the mutual attraction between the magnet and the iron block. The cover mechanism closes again to prevent the needle from being exposed and reduce the risk of needle puncture to pregnant women or medical staff. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional cross-sectional structural diagram of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the sleeve of the present invention; Figure 4 This is a schematic diagram of the propulsion mechanism of the present invention; Figure 5 This is a schematic diagram of the cover mechanism of the present invention; Figure 6 This is a schematic diagram of the opening mechanism of the present invention; Figure 7 For the present invention Figure 2 Enlarged schematic diagram of the structure at point A in the middle; Figure 8 For the present invention Figure 2 Enlarged schematic diagram of the structure at point B.

[0027] Reference numerals: 1. Sleeve; 11. First fixing block; 12. First through hole; 13. Second fixing block; 14. Second through hole; 15. First spring; 16. Arc groove; 17. Threaded groove; 2. Cover mechanism; 21. Upper cover; 22. Lower cover; 23. Extension plate; 24. Connecting rod; 25. Iron block; 26. Magnet; 3. Propulsion mechanism; 31. Screw; 32. Rotating handle; 33. Through groove; 4. 41. Extraction mechanism; 42. Extraction tube; 43. Piston rod; 44. Needle; 45. Storage groove; 46. Slide groove; 57. Displacement groove; 68. Spreading mechanism; 59. Moving block; 50. Third through hole; 51. Connecting plate; 52. Triangular block; 60. Limiting mechanism; 61. Push ring; 62. Support rod; 63. Slide plate; 64. First tooth; 65. Second spring; 66. Limiting plate; 67. Second tooth. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0029] Please see Figure 1 - Figure 8 This application provides an obstetric membrane rupture device, including a sleeve 1, a cover mechanism 2 hinged to the end of the sleeve 1, and a propulsion mechanism 3 threadedly connected inside the sleeve 1.

[0030] like Figure 2 and Figure 3 As shown, a first fixing block 11 and a second fixing block 13 are fixedly installed inside the sleeve 1. A first through hole 12 is opened on the surface of the first fixing block 11, a second through hole 14 is opened on the surface of the second fixing block 13, a first spring 15 is fixedly connected to the surface of the second fixing block 13, a symmetrical arc groove 16 is opened on the surface of the sleeve 1, and a threaded groove 17 is opened on one side of the sleeve 1.

[0031] In this embodiment, a cavity is formed between the first fixing block 11 and the second fixing block 13 for the movement of the moving block 51. The inner diameter of the first through hole 12 is larger than the outer diameter of the screw 31 for the sliding of the screw 31. The inner diameter of the second through hole 14 is larger than the outer diameter of the needle 43 for the sliding of the needle 43. When the membrane is broken, the first spring 15 is in a compressed state. After the membrane is broken, the first spring 15 rebounds and the moving block 51 returns to its initial position for the next use. The arc groove 16 is used for the movement of the connecting rod 24, and the threaded groove 17 is used for the rotation of the screw 31.

[0032] like Figure 2 and Figure 5 As shown, the cover mechanism 2 includes an upper cover 21 and a lower cover 22. Both the upper cover 21 and the lower cover 22 are hinged to the end of the sleeve 1. Symmetrical extension plates 23 are fixedly installed on the surfaces of both the upper cover 21 and the lower cover 22. A connecting rod 24 is fixedly connected between the two extension plates 23. The connecting rod 24 is slidably connected inside the arc groove 16. An iron block 25 is fixedly installed at one end of the upper cover 21, and a magnet 26 is fixedly installed at one end of the lower cover 22. The magnet 26 and the iron block 25 are movably attached to each other.

[0033] In this embodiment, the cover mechanism 2 is initially in a closed state, which facilitates the overall insertion of the device into the birth canal. When the membrane is broken, the moving block 51 moves forward, causing the triangular block 54 to squeeze the connecting rod 24. The connecting rod 24 rotates inside the arc-shaped groove 16, which further causes the upper cover 21 and the lower cover 22 to rotate and separate. The cover mechanism 2 opens, which facilitates the needle 43 to perform the membrane breaking work. After the membrane breaking work is completed, the moving block 51 moves backward. Through the mutual attraction between the magnet 26 and the iron block 25, the upper cover 21 and the lower cover 22 are attached, and the cover mechanism 2 closes again.

[0034] like Figure 2 and Figure 4 As shown, the propulsion mechanism 3 includes a screw 31, which is threadedly connected inside the threaded groove 17. A rotating handle 32 is fixedly installed on the surface of the screw 31. Both the screw 31 and the rotating handle 32 have through grooves 33 inside. The screw 31 is slidably connected inside the first through hole 12.

[0035] In this embodiment, when the membrane breaking operation is required, the screw 31 is rotated by rotating the handle 32. The screw 31 moves forward inside the sleeve 1, and the front end of the screw 31 is in contact with the surface of the moving block 51, thereby driving the moving block 51 to move forward, further enabling the extraction mechanism 4 to perform the membrane breaking operation, while the spreading mechanism 5 spreads the upper cover 21 and the lower cover 22 apart.

[0036] The propulsion mechanism 3 is slidably connected to the inside of the sleeve 1, and the extraction mechanism 4 is used for extracting amniotic fluid. The sleeve 1 is slidably connected to the inside of the sleeve, and the opening mechanism 5 is used to open the cover mechanism 2. The propulsion mechanism 3 is used to propel the extraction mechanism 4 and the opening mechanism 5 inside the sleeve 1. The cover mechanism 2 is used to protect the extraction mechanism 4.

[0037] like Figure 2 , Figure 7 and Figure 8 As shown, the extraction mechanism 4 includes an extraction tube 41, which is slidably connected inside the through groove 33. A piston rod 42 is slidably connected inside the extraction tube 41, and a needle 43 is fixedly connected to the end of the extraction tube 41. The needle 43 is slidably connected inside the second through hole 14.

[0038] In this embodiment, when the moving block 51 moves forward inside the sleeve 1, the extraction tube 41 and the needle 43 move along with it. After the needle 43 breaks the membrane, the piston rod 42 is pulled to extract the amniotic fluid sample. The extracted amniotic fluid is stored inside the extraction tube 41.

[0039] like Figure 2 , Figure 7 and Figure 8 As shown, a symmetrical storage groove 44 is provided on the surface of one end of the extraction tube 41, a symmetrical sliding groove 45 is provided inside the extraction tube 41, and a symmetrical clearance groove 46 is provided on the surface of the other end of the extraction tube 41.

[0040] In this embodiment, the storage groove 44 is used for temporary storage of the limiting plate 66, the sliding groove 45 is used for stable movement of the sliding plate 63, and the clearance groove 46 provides space for the movement of the support rod 62.

[0041] like Figure 2 and Figure 6 As shown, the spreading mechanism 5 includes a movable block 51, which is slidably connected between the first fixed block 11 and the second fixed block 13. The other end of the first spring 15 is fixedly connected to the surface of the movable block 51, and one end of the screw 31 is movably attached to the surface of the movable block 51.

[0042] In this embodiment, when the screw 31 rotates, the extrusion moving block 51 moves inside the first fixed block 11 and the second fixed block 13, thereby performing the film breaking operation.

[0043] like Figure 2 and Figure 6As shown, a third through hole 52 is provided on the surface of the movable block 51, and the extraction tube 41 is slidably connected inside the third through hole 52. A symmetrical connecting plate 53 is fixedly installed on the surface of the movable block 51, and a triangular block 54 is fixedly installed at the end of the connecting plate 53. The connecting rod 24 is movably attached to the inclined surface of the triangular block 54. A gap is formed between the surface of the second fixed block 13 and the inner wall of the sleeve 1, and the connecting plate 53 is slidably connected inside the gap.

[0044] In this embodiment, the third through hole 52 is used for the movement of the extraction tube 41. When the moving block 51 moves, the connecting plate 53 and the triangular block 54 move forward at the same time. The triangular block 54 squeezes the connecting rod 24, causing the connecting rod 24 to rotate. The upper cover 21 and the lower cover 22 separate, providing space for the needle 43 to break the membrane. The gap provides space for the movement of the connecting plate 53.

[0045] The extraction mechanism 4 is slidably connected to the limiting mechanism 6, which is used to disassemble the extraction mechanism 4 inside the pushing mechanism 3 and the spreading mechanism 5.

[0046] like Figure 7 and Figure 8 As shown, the limiting mechanism 6 includes a push ring 61, which is slidably connected to the surface of the extraction tube 41. Symmetrical support rods 62 are fixedly connected to the surface of the push ring 61. A slide plate 63 is fixedly installed at the end of the support rod 62. Multiple first teeth 64 are fixedly installed at the end of the slide plate 63. A second spring 65 is fixedly installed at the end of the slide plate 63. The other end of the second spring 65 is fixedly connected to the inner wall of the slide groove 45. A limiting plate 66 is rotatably connected inside the receiving groove 44. Multiple second teeth 67 are fixedly installed on the surface of the limiting plate 66. The second teeth 67 are ring-shaped, and the first teeth 64 mesh with the second teeth 67.

[0047] In this embodiment, the pushing ring 61 is pushed forward on the surface of the extraction tube 41, and the support rod 62 drives the sliding plate 63 to move inside the sliding groove 45. The second spring 65 is compressed, and through the meshing of the first tooth 64 and the second tooth 67, the limiting plate 66 rotates from a vertical state to a horizontal state and is retracted into the receiving groove 44. The extraction tube 41 is then inserted into the through groove 33 and the third through hole 52 after it becomes cylindrical. When the front end of the extraction tube 41 moves to the front of the third through hole 52, the pushing ring 61 is released, and the second spring 65 rebounds. The push ring 61 moves backward, and the slide plate 63 moves backward inside the slide groove 45 at the same time. The limiting plate 66 rotates from inside the storage groove 44, changing from a horizontal state to a vertical state and fitting with the surface of the moving block 51. When the moving block 51 moves forward, it drives the extraction tube 41 forward, and the needle 43 can perform the membrane breaking work. After the amniotic fluid sample is extracted, the push ring 61 is pushed again, and the limiting plate 66 is retracted into the storage groove 44 again, so that the extraction tube 41 is taken out from the through groove 33 and the third through hole 52, realizing the separation of the extraction tube 41 from the sleeve 1.

[0048] like Figure 7 and Figure 8 As shown, the slide plate 63 is slidably connected inside the slide groove 45, the support rod 62 is slidably connected inside the relief groove 46, and the limiting plate 66 is in active contact with the surface of the moving block 51.

[0049] In this embodiment, the slide groove 45 provides space for the movement of the slide plate 63, making the slide plate 63 more stable when moving, and the clearance groove 46 provides space for the movement of the support rod 62.

[0050] The working principle of this embodiment is as follows: First, the pushing ring 61 is pushed forward on the surface of the extraction tube 41. The support rod 62 drives the sliding plate 63 to move inside the sliding groove 45. The second spring 65 is compressed. Through the meshing of the first tooth 64 and the second tooth 67, the limiting plate 66 is rotated from a vertical state to a horizontal state and retracted into the receiving groove 44. The extraction tube 41 is cylindrical and inserted into the through groove 33 and the third through hole 52. When the front end of the extraction tube 41 moves to the front of the third through hole 52, the pushing ring 61 is released, the second spring 65 rebounds, and the pushing ring 61 moves backward. At the same time, the sliding plate 63 moves backward inside the sliding groove 45. The limiting plate 66 rotates from inside the receiving groove 44, changing from a horizontal state to a vertical state and fitting against the surface of the moving block 51. The screw 31 is rotated by rotating the handle 32. The screw 31 moves forward inside the sleeve 1, and the front end of the screw 31 touches the surface of the moving block 51. The upper cover 21 and the lower cover 22 are separated, and the upper cover 21 and the lower cover 22 are separated. At the same time, the upper cover 21 and the lower cover 22 move forward. The upper cover 21 and the lower cover 22 move forward, and the lower cover 22 moves forward. The lower cover 21 and the lower cover 22 move forward. The lower cover 43 performs membrane breaking. After membrane breaking, the upper cover 21 and the lower cover 22 are pulled out. The amniotic fluid is stored inside the upper cover 41. The screw 31 is rotated in the opposite direction. Under the rebound action of the first spring 15, the upper cover 51 moves backward. Through the mutual attraction between the magnet 26 and the iron block 25, the upper cover 21 and the lower cover 22 are put together. The cover mechanism 2 closes again and pushes the push ring 61 again. The limit plate 66 is retracted into the storage groove 44 again. The entire upper cover 41 is taken out from the through groove 33 and the third through hole 52, realizing the separation of the upper cover 41 and the sleeve 1. The amniotic fluid sample is transferred.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. An obstetric membrane rupture device, comprising a sleeve (1), characterized in that, The sleeve (1) is hinged to a cover mechanism (2) at its end, and the sleeve (1) is threadedly connected to a propulsion mechanism (3), and also includes; The propulsion mechanism (3) is slidably connected to the sleeve (1) with an extraction mechanism (4), which is used for extracting amniotic fluid. The sleeve (1) is slidably connected with a spreading mechanism (5), which is used to spread the cover mechanism (2). The propulsion mechanism (3) is used to propel the extraction mechanism (4) and the spreading mechanism (5) inside the sleeve (1). The cover mechanism (2) is used to protect the extraction mechanism (4). The extraction mechanism (4) is slidably connected to a limiting mechanism (6), which is used to disassemble the extraction mechanism (4) inside the propulsion mechanism (3) and the spreading mechanism (5).

2. The obstetric membrane rupture device according to claim 1, characterized in that, The sleeve (1) is fixedly installed with a first fixing block (11) and a second fixing block (13). The first fixing block (11) has a first through hole (12) on its surface, and the second fixing block (13) has a second through hole (14) on its surface. A first spring (15) is fixedly connected to the surface of the second fixing block (13). The sleeve (1) has a symmetrical arc groove (16) on its surface, and a threaded groove (17) is provided on one side of the sleeve (1).

3. The obstetric membrane rupture device according to claim 2, characterized in that, The cover mechanism (2) includes an upper cover (21) and a lower cover (22). The upper cover (21) and the lower cover (22) are both hinged to the end of the sleeve (1). Symmetrical extension plates (23) are fixedly installed on the surfaces of the upper cover (21) and the lower cover (22). A connecting rod (24) is fixedly connected between the two extension plates (23). The connecting rod (24) is slidably connected inside the arc groove (16). An iron block (25) is fixedly installed at one end of the upper cover (21), and a magnet (26) is fixedly installed at one end of the lower cover (22). The magnet (26) and the iron block (25) are movably attached.

4. The obstetric membrane rupture device according to claim 3, characterized in that, The propulsion mechanism (3) includes a screw (31), which is threadedly connected inside the threaded groove (17). A rotating handle (32) is fixedly installed on the surface of the screw (31). Both the screw (31) and the rotating handle (32) have through grooves (33) inside. The screw (31) is slidably connected inside the first through hole (12).

5. The obstetric membrane rupture device according to claim 4, characterized in that, The extraction mechanism (4) includes an extraction tube (41), which is slidably connected inside the through groove (33). A piston rod (42) is slidably connected inside the extraction tube (41). A needle (43) is fixedly connected to the end of the extraction tube (41), and the needle (43) is slidably connected inside the second through hole (14).

6. The obstetric membrane rupture device according to claim 5, characterized in that, The extraction tube (41) has a symmetrical receiving groove (44) on one end surface, a symmetrical sliding groove (45) inside the extraction tube (41), and a symmetrical clearance groove (46) on the other end surface.

7. The obstetric membrane rupture device according to claim 6, characterized in that, The spreading mechanism (5) includes a movable block (51), which is slidably connected between the first fixed block (11) and the second fixed block (13). The other end of the first spring (15) is fixedly connected to the surface of the movable block (51), and one end of the screw (31) is movably attached to the surface of the movable block (51).

8. The obstetric membrane rupture device according to claim 7, characterized in that, The surface of the movable block (51) is provided with a third through hole (52), the extraction tube (41) is slidably connected inside the third through hole (52), the surface of the movable block (51) is fixedly installed with a symmetrical connecting plate (53), the end of the connecting plate (53) is fixedly installed with a triangular block (54), the connecting rod (24) is movably fitted with the inclined surface of the triangular block (54), a gap is formed between the surface of the second fixed block (13) and the inner wall of the sleeve (1), and the connecting plate (53) is slidably connected inside the gap.

9. The obstetric membrane rupture device according to claim 7, characterized in that, The limiting mechanism (6) includes a push ring (61), which is slidably connected to the surface of the extraction tube (41). Symmetrical support rods (62) are fixedly connected to the surface of the push ring (61). A slide plate (63) is fixedly installed at the end of the support rod (62). Multiple first teeth (64) are fixedly installed at the end of the slide plate (63). A second spring (65) is fixedly installed at the end of the slide plate (63). The other end of the second spring (65) is fixedly connected to the inner wall of the slide groove (45). A limiting plate (66) is rotatably connected inside the receiving groove (44). Multiple second teeth (67) are fixedly installed on the surface of the limiting plate (66). The second teeth (67) are ring-shaped. The first teeth (64) mesh with the second teeth (67).

10. An obstetric membrane rupture device according to claim 9, characterized in that, The slide plate (63) is slidably connected inside the slide groove (45), the support rod (62) is slidably connected inside the relief groove (46), and the limiting plate (66) is in active contact with the surface of the moving block (51).

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