Traction midwifery aid

Abstract

The utility model relates to traction type midwifery auxiliary device, including external head cover and internal head cover, external head cover includes sleeve tube, elastic clamp jaw, internal head cover includes cover body, traction pull rod, bound edge. The utility model is based on the cooperation design of elastic clamp jaw and cover body on one hand, can form initial covering with automatic outer expansion and inner retraction when midwifery, and the reverse force of traction pull rod and sleeve tube is used to drive the edge of cover mouth to turn inwards and tighten, realize the dynamic gradual covering of fetal head, and after the external head cover is removed outward, can realize covering traction, not only reduce the fetal head slip risk, enhance traction stability, but also effectively avoid the scalp hematoma, tissue damage and puerpera soft birth canal damage that traditional negative pressure suction can cause, improve the mother and infant safety, on the other hand, the cooperation of claw tip and bound edge not only reduces the interference of bound edge to the size change of cover mouth, but also can provide smaller covering mouth when turning inwards covering to increase the covering force formed by cover body and fetal head.

Description

Technical Field

[0001] This utility model belongs to the field of childbirth equipment, specifically relating to a traction-type midwifery aid. Background Technology

[0002] Vacuum extraction is a method of assisted childbirth that uses a vacuum device, such as a suction tube or other tool, inserted into the uterus. By increasing the pressure within the uterus and employing negative pressure suction, it helps the pregnant woman deliver the baby. This method is typically suitable for difficult labor situations, such as fetal hypoxia, decreased fetal heart rate, maternal weakness, or a narrow birth canal. It helps reduce the likelihood of complications for the fetus. However, because it requires placing the vacuum device inside the vagina, it can potentially cause trauma to both the fetus and the mother, such as tearing of the birth canal or increasing the likelihood of tearing.

[0003] For example, CN118267064A discloses an obstetric suction delivery device, including: a suction unit and a connecting unit fixedly connected to the suction unit; the suction unit includes: a support plate and several suction plates fixedly disposed on the support plate; the axis of the support plate is horizontally arranged, the several suction plates are circumferentially distributed on the support plate and coaxially arranged with the support plate, the radius of the cross section perpendicular to the distribution axis of the suction plates gradually increases from one end connected to the support plate to the other end, each suction plate is provided with several airbags, each airbag is connected to an inflation device; the several airbags are all disposed on the inner surface of the suction plates, the number of suction plates is at least 3, a fetal detector is disposed on the support plate, the connecting unit is coaxially arranged with the support plate, a suction cup is disposed on the side of the support plate, the suction cup and the several suction plates are located on the same side, a processing unit is disposed on the connecting unit, the inflation device and the fetal detector are respectively connected to the processing unit, the processing unit controls the inflation device to inflate and deflate the airbags according to the fetal head rotation and the rhythm of the pregnant woman's uterine contractions. The steps are as follows: S1: Insert the obstetric suction delivery device into the vagina, acquire information on the structure and position of the fetal head, and place the fetal head into the space formed by several suction plates; S2: Adjust the airbag according to the fetal head position information, and inflate the airbags on different sides differently to prompt the fetal head to correct its position. S3: After the fetal head is in the correct position, the air bladder is inflated again according to the fetal head structure information so that the air bladder fits the fetal head. S4: By using the connecting unit to pull, the fetus is pulled out of the vagina, helping the pregnant woman to have a natural birth.

[0004] However, in the above process, the clamping force is entirely based on the deformation clamping formed by the suction plate, and the contact with the fetal head is entirely based on the airbag. If the fetal head is large, the clamping force provided by the deformation of the suction plate and airbag alone may not be sufficient to overcome the resistance encountered by the fetus when passing through the birth canal, which will lead to the following main problems: 1) Traction failure and prolonged labor time: The most direct consequence of insufficient clamping force is that the fetal head and the suction plate will shift or even slip completely during traction. This means that the assisted delivery process will be interrupted and the equipment will need to be repositioned and adjusted. This not only significantly prolongs the second stage of labor, but also increases the risk to the fetus and exacerbates the fatigue and pain of the mother. 2) Increased risk of fetal injury. For example, unstable clamping and slippage can cause uneven traction on the fetal scalp, which can easily lead to scalp hematoma, abrasion or tear. Severe slippage may cause a sudden change in negative pressure similar to the "cupping" effect, which can aggravate tissue damage. In addition, if the device is quickly reapplied with negative pressure after slippage, or if the negative pressure is excessively increased because more force is needed to prevent slippage, this sudden change in force will be transmitted through the fetal head, increasing the risk of neonatal intracranial hemorrhage. 3) Maternal birth canal injury: If the device accidentally slips off the fetal head, the uncontrolled suction plate may bounce or swing violently in the birth canal. Its mechanical structure may hit or even scratch the cervix and vaginal wall, resulting in unnecessary soft tissue damage and bleeding. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a brand-new traction-type midwifery aid.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A traction-type midwifery aid includes an outer headgear and an inner headgear. The outer headgear includes an outer tube and elastic grippers formed at one end of the outer tube and circumferentially spaced around the end of the tube. The elastic grippers include multiple claw pieces with aligned claw tips and forming claw areas inside. The inner headgear includes a U-shaped sleeve, a traction rod installed at the bottom of the U-shape and extending along the depth direction of the U-shape, and a rim located around the opening of the U-shape that can be turned outward and inward. When the outer and inner headgears are assembled, the traction rod protrudes from the claw area into the outer tube. The sleeve is located in the claw area, and the claw tips abut against the outward-turning area formed by the rim and the sleeve. During delivery, based on the contact of the opening with the fetal head and as the fetal head is inserted, the sleeve and elastic grippers simultaneously expand outward and contract inward to cover the fetal head. Based on the opposing forces of the outer tube and the traction rod, the rim is driven by the claw tips to gradually turn inward and tighten the coverage by reducing the diameter of the opening.

[0007] Preferably, a bowl-shaped base is formed at the end of the outer tube, wherein the outer diameter of the bowl-shaped base gradually increases from the bottom to the rim, and multiple claws are evenly spaced around the rim. This increases the claw clamping range to match changes in tire head size.

[0008] In some specific embodiments, the outer diameter of the bowl opening is greater than or equal to the outer diameter of the claw opening formed by the multiple claw tips. This satisfies both the elastic clamping requirement and the clamping needs provided by the claw tips.

[0009] According to a specific embodiment and preferred aspect of this utility model, when assembling the outer and inner head covers, the U-shaped bottom of the cover body is spaced apart from the bowl-shaped base. This allows the outer sleeve and the traction rod to exert opposing forces, facilitating relative displacement of the inner and outer head covers, thereby turning the edging inward to increase coverage. Therefore, with the outer head cover completely removed, pulling the traction rod outward directly enables assisted delivery traction.

[0010] According to another specific embodiment and preferred aspect of this utility model, each claw includes a claw body that arches outward from the claw root and claw tip, and a claw head located at the claw tip of the claw body and turned outward to fit against the outer side of the claw body. When the outer and inner head covers are assembled, the edging fits snugly against the outer side of the claw head. Through the outward-turned clamp, it can abut against the inner side of the edging during assembly, and as the cover body covers the head, the edging remains unchanged, thereby preventing the edging from affecting the size of the opening.

[0011] Preferably, the width of each claw body gradually increases from the claw root to the claw tip. The clamping force generated by the width variation is strongest at the end, resulting in the best closing effect and facilitating the wrapping operation.

[0012] Furthermore, when assembling the outer and inner head caps, the width formed by the edging is greater than the width of the claw head's outer extension. The advantages of this design are: it not only reduces the interference of the edging on changes in the size of the cap opening, but also provides a smaller coverage opening during inversion, further increasing the coverage strength formed by the cap and fetal head, reducing traction failure rate, and the risk of injury to the fetal head and the mother's birth canal.

[0013] In some specific implementations, the sheath, traction rod, and edging are integrally molded and are flexible. The material is generally silicone. It should be noted that this application is not based on clamping traction, but rather on a tightening and covering method, using strong covering force to quickly perform assisted delivery traction. Furthermore, it should be pointed out that in this application, when it is necessary to remove the outer head covering during assisted delivery traction, it can be done simply by manipulating the flexible inner head covering, which not only reduces the probability of damage to the birth canal but also facilitates assisted delivery traction.

[0014] Preferably, the traction rod includes a core rod body, multiple ribs spaced circumferentially around the core rod body, and a traction end, wherein the traction rod located inside the outer sleeve abuts against the inner wall of the outer sleeve from the ribs. The motion guidance formed by the ribs ensures relatively uniform force on the elastic grippers, thereby facilitating stable operation of assisted delivery traction.

[0015] In addition, the outer headgear also includes a cap formed at the other end of the outer tube, which facilitates the relative removal of the outer tube.

[0016] In some implementations, the outer sleeve and the elastic gripper are integrally molded. Generally, the outer headgear is made of rubber or plastic.

[0017] Due to the implementation of the above technical solution, this utility model has the following advantages compared with the prior art: In current traction-assisted labor, if the fetal head is large, the clamping force provided by the deformation of the suction plate and airbag may be insufficient to overcome the resistance encountered by the fetus as it passes through the birth canal. The most direct consequence of insufficient clamping force is that the fetal head may shift relative to the suction plate or even slip completely during traction. This means that the assisted labor process will be interrupted, requiring repositioning and adjustment of the equipment. This not only significantly prolongs the second stage of labor but also increases the risk to the fetus and exacerbates the mother's fatigue and pain. At the same time, unstable clamping and slippage will cause the traction force to be applied unevenly to the fetal scalp, which can easily lead to scalp hematoma, abrasions, or tears. Severe slippage may cause a condition similar to "cupping." The sudden change in negative pressure exacerbates tissue damage. Furthermore, if the device is rapidly reapplied with negative pressure after slippage, or if the negative pressure is excessively increased to prevent slippage, this sudden change in force can be transmitted through the fetal head, increasing the risk of neonatal intracranial hemorrhage. Additionally, if the clamp accidentally slips off the fetal head, the uncontrolled suction plate may violently rebound or swing within the birth canal, potentially impacting or even scratching the cervix and vaginal walls, leading to unnecessary soft tissue damage and bleeding. This invention addresses these shortcomings by comprehensively designing the structure of the traction-type obstetric aid, cleverly resolving the deficiencies and limitations of existing technologies. In this invention, the elastic grippers and sheath are fitted together, with the gripper tips contacting the everted area formed by the sheath and the sheath. During delivery, as the sheath contacts the fetal head and is inserted, the sheath and elastic grippers simultaneously expand outward and contract inward to cover the fetal head. Furthermore, based on the opposing forces of the outer sheath and the traction rod, the sheath is driven by the gripper tips to gradually flip inward and tighten the coverage by reducing the diameter of the sheath opening. Finally, the outer head cover is removed, and the traction rod is pulled outward to complete the delivery. Therefore, this invention, on the one hand, is based on the coordinated design of the elastic grippers and the sheath, which automatically expands outward and contracts inward with the fetal head to form an initial coverage during delivery, and on the other hand... The opposing forces of the traction lever and the outer sheath drive the edge of the sheath to flip inward and tighten, achieving a dynamic and progressive wrapping of the fetal head. After the outer sheath is removed, traction can be achieved, which not only reduces the risk of fetal head slippage and enhances traction stability, but also effectively avoids scalp hematoma, tissue damage, and soft tissue damage to the mother that may be caused by traditional negative pressure suction, thus improving maternal and infant safety. On the other hand, the clever use of the claw tip and the edge not only reduces the interference of the edge on the size changes of the sheath opening, but also provides a smaller wrapping opening when inverting to increase the wrapping force formed by the sheath and the fetal head, thereby further improving maternal and infant safety. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the traction-type midwifery aid in this embodiment; Figure 2 for Figure 1 A structural decomposition diagram; Figure 3 for Figure 2Schematic diagram of the structure of the outer headgear; Figure 4 for Figure 3 Front view diagram; Figure 5 for Figure 4 Schematic diagram of sectional view along line AA; Figure 6 for Figure 2 A schematic diagram of the internal headgear structure; Figure 7 for Figure 6 Front view diagram; Figure 8 for Figure 7 BB-direction sectional view; The components are: 1. Outer head cover; 10. Outer sleeve; 11. Elastic gripper; 110. Grip plate; p1. Grip plate body; p2. Grip head; 12. Tube cap; 13. Bowl-shaped base plate; 2. Inner head cover; 20. Sleeve body; 21. Traction rod; 210. Core rod body; 211. Rib; 212. Traction end; 22. Edge binding. Detailed Implementation

[0019] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. Many specific details are set forth in the following description to provide a full understanding of the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present utility model. Therefore, the present utility model is not limited to the specific embodiments disclosed below.

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] In this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0025] like Figures 1 to 8 As shown, the traction-type midwifery aid involved in this embodiment includes an outer head cover 1 and an inner head cover 2, wherein the inner head cover 2 and the outer head cover 1 are fitted together.

[0026] In some specific embodiments, the outer headgear 1 includes an outer sleeve 10, elastic grippers 11 formed at the upper end of the outer sleeve 10 and spaced circumferentially around the end of the sleeve, and a cap 12 formed at the lower end of the outer sleeve 10. The outer sleeve 10 is hollow inside, and a bowl-shaped base 13 is formed at the upper end of the outer sleeve 10. The outer diameter of the bowl-shaped base 13 gradually increases from the bottom to the rim. The elastic grippers 11 are formed at the rim of the bowl-shaped base 13, and the outer diameter of the rim is greater than or equal to the outer diameter of the gripper opening formed by the multiple gripper tips. This satisfies both elastic gripping and the gripping requirements provided by the gripper tips.

[0027] In this example, the elastic gripper 11 includes multiple claw pieces 110 with aligned claw tips and forming claw areas inside. These claw pieces 110 are evenly spaced around the circumference of the bowl opening. Increasing the claw area expands the gripping range to accommodate variations in tire head size. Each claw piece 110 includes a claw body p1 that arches outward from the claw root and claw tip, and a claw tip p2 located at the claw tip of the claw body p1 and turned outward to fit against the outside of the claw body p1. The width formed by each claw body p1 gradually increases from the claw root to the claw tip. The clamping force generated by this width variation is strongest at the ends, resulting in optimal closing effect and facilitating the wrapping operation.

[0028] The inner headgear 2 includes a U-shaped sleeve body 20, a traction rod 21 installed at the bottom of the U-shape and extending along the depth of the U-shape, and an edging 22 located around the opening of the U-shape and capable of being turned outwards and inwards.

[0029] In some specific embodiments, the sleeve 20, traction rod 21, and edging 22 are integrally formed and are flexible bodies. They are generally made of silicone. It should be noted that this application is not based on clamping traction, but rather on a tightening and covering method, allowing for rapid assisted labor traction under strong covering force. Furthermore, it should be pointed out that in this application, when assisted labor traction is required, the outer head covering needs to be removed; only the flexible inner head covering needs to be operated, which not only reduces the probability of damage to the birth canal but also facilitates assisted labor traction. The traction rod 21 includes a core rod body 210, multiple ribs 211 spaced circumferentially around the core rod body 210, and a traction end 212. The traction rod 21 located inside the outer sleeve 10 abuts against the inner wall of the outer sleeve 10 from the ribs 211. Based on the motion guidance formed by the ribs, the elastic grippers are subjected to relatively uniform force, thereby facilitating stable operation of assisted labor traction.

[0030] Furthermore, during the assembly of the outer head cover 1 and the inner head cover 2, the traction rod 21 extends from the claw area into the outer sleeve 10, with the sleeve body 20 located within the claw area. The claw tip abuts against the outward-turned area formed by the edging 22 and the sleeve body 20. That is, the edging 22 fits snugly over the outside of the claw head p2, while the U-shaped bottom of the sleeve body 20 is spaced apart from the bowl-shaped base 13. Here, the outward-turned clamps abut against the inside of the edging during assembly, and as the sleeve body covers the fetal head, the edging remains unchanged, thus preventing the edging from affecting the size of the opening. The opposing forces of the outer sleeve and the traction rod facilitate relative displacement of the inner and outer head covers, thereby turning the edging inward to increase the coverage capacity. Therefore, with the outer head cover completely removed, the traction rod can be pulled outward directly to perform assisted delivery traction. In this example, the width formed by the edging 22 is greater than the width extending outward from the claw head p2. The advantages of this design are: it not only reduces the interference of the edging on the size of the opening, but also provides a smaller opening when the fetus is inverted, further increasing the coverage force formed by the sheath and the fetal head, reducing the traction failure rate and the risk of injury to the fetal head and the mother's birth canal.

[0031] In summary, the delivery assistance process in this embodiment includes the following steps: S1, a set of inner and outer headgear. The traction rod 21 of the inner head cover 2 is passed out from the claw area and through the outer sleeve 10, and the traction rod 21 is pulled outward so that the claw head p2 abuts against the outward turning area formed by the edge 22 and the sleeve body 20, and the edge 22 fits and covers the outside of the claw head p2. At the same time, the U-shaped bottom of the sleeve body 20 is spaced apart from the bowl-shaped base plate 13. S2, Coverage of inner and outer headgear When the baby's head is exposed, the delivery instrument is brought into contact with the fetal head through the opening formed by the sheath 20, and as the fetal head enters the interior of the sheath 20, the elastic clamps 11 are stretched outward or retracted inward to cover the baby's head with the sheath 20. S3, traction-assisted delivery with internal head covering Based on the opposing forces of the outer sleeve 10 and the traction rod 21, the edge 22 is driven by the claw tip p2 to gradually flip inward and tighten the wrap by reducing the diameter of the sleeve opening. Then, the outer head cover 1 is pulled outward so that only the inner head cover 2 is fitted on the fetal head. Finally, the traction rod 21 is pulled outward to implement traction-assisted delivery.

[0032] In summary, when using this delivery aid, the elastic grippers and sheath are fitted together, with the gripper tips abutting against the everted area formed by the sheath and the sheath. During delivery, as the sheath contacts the fetal head and is inserted, the sheath and elastic grippers simultaneously expand outward and contract inward to cover the fetal head. Furthermore, based on the opposing forces of the outer sheath and the traction rod, the sheath is driven by the gripper tips to gradually flip inward and tighten the coverage by reducing the diameter of the sheath opening. Finally, the outer head cover is removed, and the traction rod is pulled outward to complete the delivery. Therefore, this invention, on the one hand, is based on the coordinated design of the elastic grippers and the sheath, which automatically expands outward and contracts inward with the fetal head during delivery to form an initial coverage, and on the other hand, utilizes the traction rod and the outer sheath to tighten the coverage. The reverse force of the cannula drives the edge of the cannula to turn inward and tighten, achieving a dynamic and gradual wrapping of the fetal head. After the outer head cannula is removed, traction can be achieved, reducing the risk of fetal head slippage and enhancing traction stability. It also effectively avoids scalp hematoma, tissue damage, and soft tissue injury to the mother that may occur with traditional negative pressure suction, thus improving maternal and infant safety. Furthermore, the clever use of the claw tips and the edge not only reduces the interference of the edge on changes in the cannula's size but also provides a smaller wrapping opening during inward wrapping, increasing the wrapping force formed by the cannula and the fetal head, further enhancing maternal and infant safety. Thirdly, the bowl-shaped base extends from the bottom to the rim... The outer diameter gradually increases, and multiple claws are evenly spaced around the circumference of the bowl. This increases the gripping range by expanding the claw area to match the changing size of the fetal head. The outer diameter of the bowl is greater than or equal to the outer diameter of the claw opening formed by the multiple claw tips, satisfying both elastic clamping and the clamping requirements provided by the claw tips. Fourthly, the opposing forces between the outer sleeve and the traction rod facilitate relative displacement between the inner and outer headgear, thereby turning the edging inward to increase coverage. Therefore, with the outer headgear completely removed, pulling the traction rod outward directly allows for assisted delivery traction. Fifthly, the outward-turned clamps can abut against the inner side of the edging during assembly, and as the sleeve is fitted... The outer and inner head covers are designed to prevent the edging from changing and thus avoid affecting the size of the opening. Furthermore, the width of each claw gradually increases from the claw root to the claw tip, resulting in the strongest clamping force at the end, leading to optimal closing and facilitating the covering operation. Sixthly, when assembling the outer and inner head covers, the width of the edging is greater than the width extending outwards from the claw tips. This design not only reduces interference from the edging on the size of the opening but also provides a smaller covering opening during inward covering, further increasing the covering strength between the cover and the fetal head, reducing traction failure rate and the risk of injury to the fetal head and the mother's birth canal.The seventh aspect is that the outer sleeve, traction rod, and edging are integrally molded and are flexible, generally made of silicone. It should be noted that this application is not based on clamping traction, but on a tightening and covering method. Under strong covering force, rapid assisted delivery traction is achieved. Furthermore, it should be pointed out that in this application, when assisted delivery traction is required, the outer headgear can be removed simply by operating the flexible inner headgear. This not only reduces the probability of damage to the birth canal but also facilitates assisted delivery traction. Then, based on the movement guide formed by the ribs, the elastic grippers are subjected to relatively uniform force, thus facilitating stable operation of assisted delivery traction. The eighth aspect is that the outer headgear also includes a cap formed at the other end of the outer sleeve. The cap facilitates the relative removal of the outer sleeve. The outer sleeve and elastic grippers are integrally molded. Generally, the outer headgear is a rubber or plastic product.

[0033] The present utility model has been described in detail above, with the aim of enabling those skilled in the art to understand its contents and implement it. However, this description should not be construed as limiting the scope of protection of the present utility model. All equivalent changes or modifications made in accordance with the spirit and essence of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A traction midwifery aid characterised in that: It includes an outer head cover and an inner head cover. The outer head cover includes an outer tube and elastic grippers formed at one end of the outer tube and distributed circumferentially around the end of the tube. The elastic grippers include multiple claw pieces with aligned claw tips and forming claw areas inside. The inner head cover includes a sleeve with a U-shaped cross-section, a traction rod installed at the bottom of the U-shape and extending along the depth direction of the U-shape, and a edging located around the opening of the U-shape that can be turned outward and inward. When the outer head cover and the inner head cover are assembled, the traction rod protrudes from the claw area into the outer tube. The sleeve is located in the claw area, and the claw tips abut against the outward turning area formed by the edging and the sleeve. During delivery, based on the contact of the opening with the fetal head and as the fetal head is inserted, the sleeve and the elastic grippers simultaneously expand outward and contract inward to cover the fetal head. Based on the opposing forces of the outer tube and the traction rod, the edging is driven by the claw tips to gradually turn inward and tighten the coverage by reducing the diameter of the opening.

2. The traction-type midwifery aid according to claim 1, characterized in that: A bowl-shaped base is formed at the end of the outer tube, wherein the outer diameter of the bowl-shaped base gradually increases from the bottom of the bowl to the rim, and multiple claw plates are evenly spaced around the rim.

3. The traction midwifery aid of claim 2, wherein: The outer diameter of the bowl is greater than or equal to the outer diameter of the claw mouth formed by multiple claw tips.

4. The traction midwifery aid of claim 2, wherein: When assembling the outer and inner headgear, the U-shaped bottom of the headgear is spaced apart from the bowl-shaped base.

5. The traction midwifery aid of claim 1 or 2 or 3 or 4, wherein: Each claw includes a claw body that arches outward from the claw root and claw tip, and a claw head located at the claw tip of the claw body and turned outward to fit the outside of the claw body. When the outer head cover and the inner head cover are assembled, the edge is fitted and covered to the outside of the claw head.

6. The traction-type midwifery aid according to claim 5, characterized in that: The width formed by each claw plate gradually increases from the claw root to the claw tip.

7. The traction midwifery aid of claim 5, wherein: When assembling the outer and inner head covers, the width formed by the edging is greater than the width of the claw head extending outwards.

8. The traction-type midwifery aid according to claim 1, characterized in that: The sleeve, traction rod, and edging are molded as a single piece and are flexible.

9. The traction midwifery aid of claim 1 or 8, wherein: The traction rod includes a core rod body, multiple reinforcing bars spaced circumferentially around the core rod body, and a traction end, wherein the traction rod located inside the outer sleeve abuts against the inner wall of the outer sleeve from the reinforcing bars.

10. The traction midwifery aid of claim 1, wherein: The outer headgear also includes a cap formed at the other end of the outer tube; and / or, the outer tube and the resilient gripper are integrally formed.

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