Obstetric apparatus for assisting delivery in obstetrical department
By using damping fluid and viscous resistance control with perforated piston plates in the delivery device, the problem of muscle strain caused by spring rebound impact is solved, improving the safety and comfort of maternal training and allowing doctors to participate in adjustment and assisted training.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KUNSHAN THIRD PEOPLES HOSPITAL
- Filing Date
- 2025-01-13
- Publication Date
- 2026-05-19
AI Technical Summary
Existing elastic leg resistance training equipment can easily cause muscle strains during childbirth because the sudden rebound force of the springs exceeds the pregnant woman's body's tolerance.
The damping fluid is used as the main source of resistance. The damping fluid in the damping outer cylinder and the slots of the perforated piston plate generate linearly varying viscous resistance. Combined with the viscous resistance of the return spring, the return speed of the piston plate is controlled to avoid muscle strain caused by rapid return. The resistance is adjusted by bevel gears.
It effectively protects the mother's muscles and prevents muscle strain, while allowing doctors to participate in adjustment and assistance training, improving the safety and comfort of training.
Smart Images

Figure CN224252042U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, and in particular to a delivery aid for obstetrics and gynecology. Background Technology
[0002] During childbirth, the pelvic floor muscles play a crucial role. Like a hammock, they support the organs within the pelvic cavity, such as the uterus, bladder, and rectum. Leg resistance training indirectly stimulates these muscles. Childbirth is a physically demanding process, requiring the mother to have sufficient strength to push the baby through the birth canal. Leg resistance training effectively strengthens leg muscles, one of the largest muscle groups in the human body. This allows for more efficient use of muscle strength during childbirth, potentially shortening labor time and reducing risks for both mother and baby.
[0003] The existing elastic leg resistance training equipment works on the principle that the elastic deformation of a spring generates resistance and restoring force. When the mother performs the leg compression action, the spring is compressed and stores elastic potential energy; when the legs relax, the spring will quickly rebound to its original state and release the elastic potential energy. However, the pregnant woman's body undergoes significant physiological changes during pregnancy. The protruding abdomen shifts the body's center of gravity forward, the physiological curvature of the spine changes, and the stability of muscles and joints also decreases. Under these circumstances, the impact force generated by the sudden rebound of the spring can easily exceed the pregnant woman's body's tolerance range and may even harm the expectant mother.
[0004] Based on the above viewpoints, those skilled in the art have proposed a birthing aid device for obstetric delivery, thereby assisting mothers in childbirth. Utility Model Content
[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a maternal delivery aid. This design utilizes damping fluid stored in the outer damping cylinder as the primary source of resistance during maternal training. When the damping fluid passes through the slots on the surface of the perforated piston plate, the linearly varying viscous resistance generated by the damping fluid passing through the slots serves as the primary source of resistance during training, effectively protecting the mother. Simultaneously, when the return spring pushes the perforated piston plate to return to its original position, the viscous resistance results in a slower separation speed between the two perforated piston plates, preventing muscle strain in the mother's legs due to rapid repositioning during the process.
[0006] To achieve the above objectives, the present invention provides the following technical solution:
[0007] A delivery aid for obstetrics includes a damping outer cylinder, damping plate assemblies are installed and connected to both sides of the inner side of the damping outer cylinder, a damping inner cylinder is rotatably connected to the center of the two damping plate assemblies, elastic resistance assemblies are slidably connected to both ends of the damping inner cylinder, and the interior of both the damping outer cylinder and the damping inner cylinder is filled with damping fluid.
[0008] The elastic resistance assembly includes two perforated piston plates, and a return spring is fixedly connected between the two perforated piston plates. The damping inner cylinder includes a damping core, and the return spring is located at the center of the damping core. The two perforated piston plates are slidably connected to the left and right ends of the damping core, respectively.
[0009] Preferably, the damping plate assembly includes a perforated damping plate, which is closely attached to the inner side of a perforated piston plate. Both the perforated damping plate and the perforated piston plate have grooves for providing damping fluid flow, and the grooves on the perforated damping plate and the perforated piston plate overlap each other. A telescopic cylinder is fixedly connected to the inner side of the perforated damping plate, and a fixed bevel gear is fixedly connected to the other end of the telescopic cylinder. The fixed bevel gear is rotatably connected to the inner wall of the damping outer cylinder.
[0010] Preferably, a hammer-shaped rod assembly is fixedly connected to the top of the damping outer cylinder, the hammer-shaped rod assembly includes a bevel gear rod, the bevel gear rod is rotatably connected to the top of the damping outer cylinder, and the bevel gear fixed at the bottom of the damping outer cylinder meshes with the fixed bevel gear.
[0011] Preferably, a return cylinder is fixedly connected to the middle position of the upper side wall of the damping cylinder core, a piston cylinder is slidably connected inside the bevel gear rod, a pin is threadedly connected to the outer side wall of the piston cylinder, a hammer-shaped rod head is slidably connected inside the piston cylinder, the hammer-shaped rod head is fixed inside the piston cylinder by the pin, and the bottom of the piston cylinder is slidably connected to the bevel gear rod.
[0012] Preferably, a connecting rod is fixedly connected to the outer wall of the perforated piston plate, and a leg strap is fixedly connected to the outer side of the connecting rod.
[0013] This utility model has the following beneficial effects:
[0014] 1. In this utility model, the damping fluid stored in the damping outer cylinder serves as the main source of resistance during postpartum training. When the mother pushes the two perforated piston plates closer together with her legs, the damping fluid stored in the damping outer cylinder, through the slots on the surface of the perforated piston plates, utilizes the linearly changing viscous resistance through the slots as the main source of resistance during training, which can effectively protect the mother. At the same time, when the return spring pushes the perforated piston plates to return to their original position, due to the existence of viscous resistance, the two perforated piston plates move away slowly, avoiding the problem of muscle strain in the mother's legs caused by the rapid return speed during the return process of the perforated piston plates.
[0015] 2. In this utility model, the mother can directly adjust the resistance during training by rotating the bevel gear rod, which is extremely convenient to operate. At the same time, the doctor can pull the hammer-shaped rod group to draw the damping fluid in the damping cylinder core into the return cylinder, which will directly drive the two perforated piston plates to move closer to each other. This allows the midwife to directly participate in the training and assist the mother in completing the training. Attached Figure Description
[0016] Figure 1 This is an overall diagram of a delivery aid for obstetric childbirth proposed in this utility model.
[0017] Figure 2 This is a top view of a delivery aid for obstetrics proposed in this utility model;
[0018] Figure 3 for Figure 2 Isometric side sectional view at point AA;
[0019] Figure 4 This is a schematic diagram showing the concealed damping outer cylinder in a delivery aid device for obstetrics and gynecology proposed in this utility model.
[0020] Figure 5 This is an explosion diagram showing the hidden damping outer cylinder in a delivery aid device for obstetrics and gynecology proposed in this utility model.
[0021] Legend:
[0022] 1. Damping outer cylinder; 2. Hammer rod assembly; 3. Elastic resistance assembly; 4. Leg straps; 5. Damping plate assembly; 6. Damping inner cylinder;
[0023] 21. Bevel gear rod; 22. Piston cylinder; 23. Pin; 24. Hammer-shaped rod head;
[0024] 31. Piston plate with holes; 32. Return spring;
[0025] 51. Fixed bevel gear; 52. Telescopic cylinder; 53. Perforated damping plate;
[0026] 61. Damping core; 62. Return cylinder. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0028] Example: Refer to Figure 1-5 A delivery aid for obstetrics includes a damping outer cylinder 1. Damping plate assemblies 5 are installed and connected to both sides of the inner side of the outer cylinder 1. A damping inner cylinder 6 is rotatably connected to the center of the two damping plate assemblies 5. Elastic resistance assemblies 3 are slidably connected to both ends of the inner cylinder 6. Both the outer cylinder 1 and the inner cylinder 6 are filled with damping fluid. The elastic resistance assembly 3 includes two perforated piston plates 31, with a return spring 32 fixedly connected between the two perforated piston plates 31. The inner cylinder 6 includes a damping core 61, with the return spring 32 located at the center of the damping core 61. The two perforated piston plates 31 are slidably connected to the left and right ends of the damping core 61, respectively. The damping training midwifery device uses the damping fluid stored in the damping outer cylinder 1 as the main source of resistance during the training. When the mother pushes the two perforated piston plates 31 closer together with her legs, the damping fluid stored in the damping outer cylinder 1 passes through the slots on the surface of the perforated piston plates 31. The linearly changing viscous resistance through the slots serves as the main source of resistance during training, which can effectively protect the mother. At the same time, when the return spring 32 pushes the perforated piston plates 31 to return to their original position, the viscous resistance causes the two perforated piston plates 31 to move away slowly, avoiding the problem of muscle strain in the mother's legs due to the rapid return speed of the perforated piston plates 31 during the return process.
[0029] In an optional embodiment: the damping plate assembly 5 includes a perforated damping plate 53, which is closely attached to the inner side of the perforated piston plate 31. Both the perforated damping plate 53 and the perforated piston plate 31 have grooves for providing damping fluid flow, and the grooves on the perforated damping plate 53 and the perforated piston plate 31 overlap with each other. A telescopic cylinder 52 is fixedly connected to the inner side of the perforated damping plate 53, and a fixed bevel gear 51 is fixedly connected to the other end of the telescopic cylinder 52. The fixed bevel gear 51 is rotatably connected to the inner wall of the damping outer cylinder 1. When the fixed bevel gear 51 rotates, the perforated damping plate 53 will be driven to rotate together with the telescopic cylinder 52, so that the perforated damping plate 53 and the slot on the perforated piston plate 31 change from overlapping to mutually blocking. At this time, the size of the slot for the flow of damping fluid becomes lower, thereby adjusting the reset speed of the perforated piston plate 31 and the resistance during training. The top of the damping outer cylinder 1 is fixedly connected to the hammer rod group 2, which includes a bevel gear rod 21. The bevel gear rod 21 is rotatably connected to the top of the damping outer cylinder 1. The bevel gear fixed at the bottom of the damping outer cylinder 1 meshes with the fixed bevel gear 51. The mother can directly adjust the resistance during training by rotating the bevel gear rod 21.
[0030] In an optional embodiment: a return cylinder 62 is fixedly connected to the middle position of the upper side wall of the damping cylinder core 61; a piston cylinder 22 is slidably connected inside the bevel gear rod 21; a pin 23 is threadedly connected to the outer side wall of the piston cylinder 22; a hammer-shaped rod head 24 is slidably connected inside the piston cylinder 22; the hammer-shaped rod head 24 is fixed inside the piston cylinder 22 by the pin 23; and the bottom of the piston cylinder 22 is slidably connected to the bevel gear rod 21. When the two perforated piston plates 31 approach each other, the damping fluid stored in the damping core 61 is pushed into the return cylinder 62. If the mother cannot directly move the perforated piston plates 31 closer together using her legs during training, the doctor can pull the hammer-shaped rod assembly 2 to draw the damping fluid from the damping core 61 into the return cylinder 62, thereby directly moving the two perforated piston plates 31 closer together. This allows the midwife to directly participate in the training and assist the mother. A connecting rod 33 is fixedly connected to the outer wall of the perforated piston plate 31, and a leg strap 4 is fixedly connected to the outer side of the connecting rod 33. The leg strap 4 is tied to the mother's legs for easy wearing of the delivery device.
[0031] Working Principle: This leg-damping training midwifery device uses damping fluid stored in the outer damping cylinder 1 as the primary source of resistance during training. When the mother pushes the two perforated piston plates 31 closer together with her legs, the damping fluid stored in the outer damping cylinder 1 flows through the slots on the surface of the perforated piston plates 31. The linearly changing viscous resistance through these slots serves as the primary source of resistance during training, effectively protecting the mother. Simultaneously, when the return spring 32 pushes the perforated piston plates 31 back to their original position, the viscous resistance slows the movement of the two perforated piston plates 31 away, preventing muscle strain in the mother's legs due to rapid repositioning. The mother can also rotate the bevel gear rod... 21. Directly adjust the resistance during training. Rotating the bevel gear rod 21 can drive the fixed bevel gear 51 to rotate. When the fixed bevel gear 51 rotates, the perforated damping plate 53 will be driven to rotate together by the telescopic cylinder 52, so that the perforated damping plate 53 and the perforated piston plate 31 change from overlapping to mutual blocking. At this time, the size of the perforated hole for the flow of damping fluid becomes lower, thereby adjusting the reset speed of the perforated piston plate 31 and the resistance during training. The doctor can pull the hammer rod group 2 to draw the damping fluid in the damping cylinder core 61 into the return cylinder 62, thereby directly driving the two perforated piston plates 31 to move closer to each other, so that the midwife can directly participate in the training and assist the mother in completing the training.
[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A delivery aid for obstetric childbirth, characterized in that: The device includes a damping outer cylinder (1), and damping plate assemblies (5) are installed and connected to both sides of the inner side of the damping outer cylinder (1). A damping inner cylinder (6) is rotatably connected to the center of the two damping plate assemblies (5). Elastic resistance assemblies (3) are slidably connected to both ends of the damping inner cylinder (6). The interiors of the damping outer cylinder (1) and the damping inner cylinder (6) are filled with damping fluid. The elastic resistance assembly (3) includes two perforated piston plates (31), and a return spring (32) is fixedly connected between the two perforated piston plates (31). The damping inner cylinder (6) includes a damping core (61), and the return spring (32) is located at the center of the damping core (61). The two perforated piston plates (31) are slidably connected to the left and right ends of the damping core (61).
2. An obstetric delivery aid according to claim 1, characterised in that: The damping plate assembly (5) includes a perforated damping plate (53), which is closely attached to the inner side of the perforated piston plate (31). Both the perforated damping plate (53) and the perforated piston plate (31) have grooves for providing damping fluid flow. The grooves on the perforated damping plate (53) and the perforated piston plate (31) overlap. A telescopic cylinder (52) is fixedly connected to the inner side of the perforated damping plate (53). A fixed bevel gear (51) is fixedly connected to the other end of the telescopic cylinder (52). The fixed bevel gear (51) is rotatably connected to the inner wall of the damping outer cylinder (1).
3. An obstetric delivery aid according to claim 2, characterised in that: The top of the damping outer cylinder (1) is fixedly connected to a hammer-shaped rod assembly (2), which includes a bevel gear rod (21). The bevel gear rod (21) is rotatably connected to the top of the damping outer cylinder (1), and the bevel gear fixed at the bottom of the damping outer cylinder (1) meshes with the fixed bevel gear (51).
4. An obstetrical delivery-assisting apparatus according to claim 3, wherein: A return cylinder (62) is fixedly connected to the middle position of the upper side wall of the damping cylinder core (61). A piston cylinder (22) is slidably connected inside the bevel gear rod (21). A pin (23) is threadedly connected to the outer side wall of the piston cylinder (22). A hammer-shaped rod head (24) is slidably connected inside the piston cylinder (22). The hammer-shaped rod head (24) is fixed inside the piston cylinder (22) by the pin (23). The bottom of the piston cylinder (22) is slidably connected to the bevel gear rod (21).
5. An obstetrical delivery-assisting apparatus according to claim 1, wherein: A connecting rod (33) is fixedly connected to the outer wall of the perforated piston plate (31), and a leg strap (4) is fixedly connected to the outer side of the connecting rod (33).