CN214318501U

CN214318501U - Antenatal examination auxiliary device

Info

Publication number: CN214318501U
Application number: CN202022481716.1U
Authority: CN
Inventors: 郭玉红
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-10-01
Anticipated expiration: 2030-10-30

Abstract

The utility model discloses a prenatal examination auxiliary device, including handrail department confined seat body, still include slewing mechanism and knocking mechanism, slewing mechanism includes the fixed plate, be equipped with the L shaped plate on the fixed plate, the other end that L shape board end was connected relatively to the slider rotates and is connected with a catch bar I, the other end of catch bar I is connected with a catch bar II, the other end that I end was connected relatively to catch bar II is connected with motor I, it has the rotor plate to articulate in the vertical section of L shaped plate, be equipped with the coupling assembling that is used for connecting knocking mechanism on the rotor plate and be used for adjusting the lifting unit of coupling assembling height, coupling assembling is connected with lifting unit. The utility model discloses a set up slewing mechanism and knocking mechanism, make the pregnant woman can sit through adjustment slewing mechanism on the seat and make the device be located the foetus top before the delivery inspection, restart knocking mechanism, the foetus is awaken up to the sound of knocking, makes foetus adjustment posture so that the doctor does the B ultrasonic and arranges the deformity.

Description

Antenatal examination auxiliary device

Technical Field

The utility model relates to a gynaecology and obstetrics's obstetrical examination technical field, concretely relates to antenatal examination auxiliary device.

Background

The obstetrics and gynecology department is one of four main subjects of clinical medicine, and is mainly used for researching the etiology, pathology, diagnosis, prevention and treatment of female reproductive organ diseases, physiological and pathological changes of pregnancy and parturition, prevention and treatment of high-grade pregnancy and dystocia, female reproductive endocrine, family planning, female health care and the like. The prenatal examination is also called perinatal health care as the name implies, and can timely know the physical condition of a pregnant woman and the growth and development condition of a fetus, ensure the health and safety of the mother and the fetus and realize the prenatal and postnatal care. The routine examination of the obstetrical examination is to measure the blood pressure and the body weight, which are reserved items for each obstetrical examination, and besides the two routine examinations, the pregnant woman needs to make different prenatal examinations according to the pregnancy period, such as: when pregnant in 20 weeks, the pregnant woman needs to do B-ultrasound for the first time to diagnose whether the fetus is malformed and observe the moving state of organs; at 34 weeks of pregnancy, the pregnant woman needs to make a second B-mode ultrasound to check whether the fetus has malformation or not, and check whether the development of the fetus is consistent with the gestational week or not.

When a pregnant woman is subjected to B-ultrasound to eliminate the deformity of the fetus, the posture of the fetus needs to be adjusted, so that a doctor can check the development conditions of the limbs, the face and various organs of the fetus through the B-ultrasound during examination. Therefore, it is required that the fetus should take a good posture in the belly of the pregnant woman for the doctor's examination. If the fetus falls asleep and faces back to the doctor during examination, the doctor cannot examine some parts, and at the moment, the pregnant woman usually selects ways of walking, eating and beating the belly to move the fetus, so that the fetus turns to a proper position to facilitate B-ultrasonic examination. However, sometimes, even after the fetus falls asleep, the methods cannot wake up the fetus, so that the examination time of the pregnant woman is prolonged, and the working efficiency of a doctor is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that before current obstetrical department's obstetrical examination, the pregnant woman uses the mode of walking, eating, patting the belly unable fetus motion, turn round to make pregnant woman check-up time lengthen, reduce doctor's work efficiency's problem. The utility model provides a prenatal examination auxiliary device, through setting up slewing mechanism and knocking mechanism, make the pregnant woman can sit on the seat before the prenatal examination and make the device be located the foetus top through adjusting slewing mechanism, restart knocking mechanism, the sound of knocking awakens up the foetus, makes the foetus adjust the posture so that the doctor does the B ultrasonic and arranges the deformity.

The utility model discloses a following technical scheme realizes:

the prenatal examination auxiliary device comprises a seat body with closed armrests, and further comprises two groups of rotating mechanisms and a knocking mechanism, wherein the two groups of rotating mechanisms are arranged at the armrests on the left side and the right side of the seat body respectively, the knocking mechanism is arranged between the two groups of rotating mechanisms and is connected with the two groups of rotating mechanisms, each rotating mechanism comprises a fixed plate which is longitudinally arranged at the armrests, an L-shaped plate is arranged on the fixed plate, the horizontal section of the L-shaped plate is rotatably connected with the fixed plate, an arc-shaped guide groove is formed in the fixed plate, the upper end of the arc-shaped guide groove and the connection part of the L-shaped plate and the fixed plate are located at the same height, and a sliding block matched with the arc-shaped guide groove is arranged at one end, away from the vertical section, of the horizontal section of the L-shaped plate; the other end, opposite to the end connected with the L-shaped plate, of the sliding block is rotatably connected with a push rod I, the other end of the push rod I is connected with a push rod II, the other end, opposite to the end connected with the push rod I, of the push rod II is connected with a motor I, and the motor I is fixed on the fixing plate; articulated on the vertical section of L shaped plate have a rotor plate of vertical setting, be equipped with the coupling assembling that is used for connecting knocking mechanism and the lifting unit who is used for adjusting coupling assembling height on the rotor plate, coupling assembling is connected with lifting unit.

At present, the deep research of the medical basic theories of modern molecular biology, oncology, genetics, reproductive endocrinology, immunology and the like and the progress of the clinical medical diagnosis and treatment detection technology widen and deepen the development of the gynecologic science, and play an important role in ensuring the health of the body and the reproduction of women and preventing and treating various gynecological diseases. The obstetrics and gynecology not only has close connection with clinical science such as surgery, internal medicine, pediatrics and the like, but also needs the basic knowledge of multiple subjects such as modern diagnosis and treatment technology (endoscope technology, imaging and the like), clinical pharmacology, pathological embryology, anatomy, epidemiology and the like, and is a subject with own characteristics and comprehensive clinical and basic knowledge. The prenatal examination is the examination before the delivery, and the prenatal examination can timely know the physical condition of the pregnant woman and the growth and development condition of the fetus, ensure the health and the safety of the mother and the fetus and realize the prenatal and postnatal care. Pregnant women can determine pregnancy as early as possible by carrying out obstetric examination at the early stage of pregnancy, comprehensively know the physical health condition of the pregnant women through measuring blood pressure, testing hematuria, comprehensive physical examination, genetic consultation and the like, screen abnormal pregnant women, and transfer the pregnant women to a conditional superior hospital for system monitoring; the pregnant woman can observe and know the physical and mental changes of the pregnant woman and the growth and development conditions of the fetus in time in the midgestation period, know whether the fetal position is normal or not and whether the pelvis of the pregnant woman is abnormal or not, and begin to make corresponding preparation in the early period for late delivery; the delivery test of the pregnant woman in the later period of pregnancy can find abnormal special conditions in time before delivery, actively prevent and treat the abnormal special conditions, facilitate doctors to give correct prenatal health guidance, select a proper delivery mode and ensure the safety and smoothness of delivery. The pregnant woman needs to perform delivery detection in the middle of pregnancy to eliminate the abnormal diseases of the fetus, and a doctor carries out the development conditions of the four limbs, the face and each organ of the fetus through B ultrasonic. In the examination process, the fetus needs to face the belly, the part needing to be examined is exposed, and a doctor can use the B-ultrasonic to irradiate and judge the development condition of the fetus. If the fetus is curled up or faces away from the belly of the pregnant woman, the pregnant woman needs to take some measures to move the fetus until the fetus changes to a posture suitable for B-ultrasonic examination. In this case, the pregnant woman usually takes ways of walking, slapping the belly, eating things, etc. to move the fetus, but sometimes the fetus is not easy to wake up after falling asleep, and the posture of the fetus cannot be changed by the conventional measures. Moreover, for the pregnant woman, the long-time walking and belly-beating modes are not beneficial to the physical health of the pregnant woman, the examination time of the pregnant woman is prolonged, and the working efficiency of a doctor is reduced. In order to solve the problem, the utility model provides an antenatal examination auxiliary device, through setting up slewing mechanism in seat body left and right sides handrail department, set up the knocking mechanism who is connected with both between two sets of slewing mechanism, make the pregnant woman overtime being done, if the foetus posture needs the adjustment, then the pregnant woman can sit on the seat body, couple together knocking mechanism and slewing mechanism, and adjust the position of whole device through slewing mechanism, make knocking mechanism be located the head position department that is close to the foetus, be convenient for awaken up the foetus and make its adjustment posture. After the pregnant woman sits on the seat body and the rotating mechanism and the knocking mechanism are connected together, the corresponding position of the knocking mechanism on the belly of the pregnant woman needs to be adjusted. Under initial state, knocking mechanism is located the dead ahead of pregnant woman's belly, if the pregnant woman needs to adjust knocking mechanism's position, open motor I can, motor I rotates and drives catch bar II and uses its I end of connecting motor as the centre of a circle to rotate, II rotations of catch bar will drive the rising and the decline of catch bar I again, catch bar I will drive the slider again and remove in the arc guide way, the slider drives the end of the horizontal segment of L shaped plate promptly and regards its and fixed plate rotation junction as the centre of a circle and do circular motion. Under the initial condition, the slider is located the top of arc guide way, and after motor I opened, the slider moved down along the arc guide way, and at this moment, the L shaped plate used its and fixed plate rotation junction to be circular motion as the centre of a circle, and its vertical section will move to the position that is close to pregnant woman's belly top to drive knocking mechanism and remove to this direction.

Further, the lifting assembly comprises two fixed blocks arranged on the rotating plate, wherein one fixed block is positioned right above the other fixed block, two fixed blocks are provided with a lead screw and two round bars which are vertically arranged, the two ends of the lead screw are respectively connected with the two fixed blocks in a rotating mode, the upper end of the rotating plate is further provided with a motor II, and the output shaft of the motor II is connected with the top of the lead screw. The utility model discloses in, because of the pregnant woman's belly size is different, so when using this device, need highly set up coupling assembling, if: the pregnant woman has a bigger belly, and the connecting assembly is required to be positioned at one end of the rotating plate far away from the L-shaped plate. And, before the pregnant woman sits on the seat body, because the vertical section of rotating plate and L shaped board is articulated, so rotating plate and the part of connecting can rotate to the one end of keeping away from the seat body earlier, make things convenient for the pregnant woman to sit like this.

Furthermore, the connecting assembly comprises a nut I matched with the screw rod, a sliding plate longitudinally arranged is arranged on the side wall of the nut I farthest from the rotating plate, and the other end of the sliding plate, opposite to the end connected with the nut I, is connected with a vertically arranged connecting block I; the sliding plate is also provided with two sliding blocks, and the two sliding blocks are respectively sleeved on the two round rods. When the height of the connecting assembly needs to be adjusted, only the motor II needs to be turned on, and the screw rod rotates to drive the nut to ascend and descend. In addition, through setting up two pipe poles and the sliding block of cover on the round bar, can make the stable reciprocating of sliding plate ability.

Furthermore, the other end below that connecting block I relatively connects the slide plate end is connected with a supporting shoe, the supporting shoe top is equipped with the cylindrical chucking pole of vertical setting, chucking pole upper end is equipped with the external screw thread. The utility model discloses a set up supporting shoe and chucking pole, make knocking mechanism when connecting with coupling assembling, it is more convenient and stable.

Furthermore, the knocking mechanism comprises a circular tube which is longitudinally arranged, the opening surface of the circular tube is provided with a tympanic membrane, the side wall of the circular tube is provided with an eccentric wheel, the center of the eccentric wheel is connected with a motor III, and the motor III is arranged in the circular tube; the eccentric wheel is provided with a lifting rod which is longitudinally arranged, the lifting rod is hinged with a knocking rod relative to the ball at the other end connected with the end of the eccentric wheel, and the other end of the knocking rod relative to the end connected with the lifting rod is connected with a knocking block; a support rod is longitudinally arranged between the knocking rod and the circular tube, one end of the support rod is fixed on the side wall of the circular tube, which is provided with the tympanic membrane, and the other end of the support rod is hinged with the knocking rod; the knocking mechanism further comprises connecting blocks II fixed on the left side and the right side of the circular tube, the other end of the two connecting blocks II, which are connected with the end of the circular tube, is connected with a clamping block, and the clamping block is provided with a through hole which is longitudinally arranged. When the pregnant woman sits well, and after the lifting assembly and the connecting assembly are adjusted, the rotating plate is moved to the position where the rotating plate and the vertical section of the L-shaped plate are located on the same straight line, and then the two ends of the knocking assembly are connected with the two groups of connecting assemblies. In the connecting process, the clamping rods on the two supporting blocks respectively penetrate through the through holes on the two clamping blocks. After knocking mechanism and coupling assembling are connected, reopen motor I, make it adjust suitable position after, reopen motor III, motor III rotates and drives the eccentric block and rotates, and the eccentric block rotates and drives the lifter to rise, descend, and when the lifter rose, the one end that the lifter was connected to the knocking rod rose, and its one end of keeping away from the lifter descends to strike the tympanic membrane, make sound, thereby awaken up the foetus and make its adjustment posture.

Furthermore, the knocking mechanism further comprises two nuts II, and the internal threads of the nuts II are matched with the external threads on the clamping rod. The utility model discloses a set up nut II, make coupling assembling link together with the subassembly of strikeing back nut II and chucking pole pass the one end of chucking piece and can carry out threaded connection to the messenger connects the subassembly and strikes the one end that the subassembly is connected more firmly.

To sum up, the utility model discloses following beneficial effect has:

(1) the utility model discloses a set up slewing mechanism and knocking mechanism, make the pregnant woman can sit through adjustment slewing mechanism on the seat and make the device be located the foetus top before the delivery inspection, restart knocking mechanism, the foetus is awaken up to the sound of knocking, makes foetus adjustment posture so that the doctor does the B ultrasonic and arranges the deformity.

(2) The utility model discloses a set up lifting unit and coupling assembling in slewing mechanism, make this device can adjust the distance of knocking mechanism apart from the pregnant woman belly according to the size of pregnant woman belly to guarantee that the pregnant woman is not injured at the in-process that uses this device, and can select suitable distance so that awaken up the foetus.

(3) The utility model discloses a set up nut II, make coupling assembling link together with the subassembly of strikeing back nut II and chucking pole pass the one end of chucking piece and can carry out threaded connection to the messenger connects the subassembly and strikes the one end that the subassembly is connected more firmly.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 is a right-side view schematic structural diagram of the present invention;

fig. 2 is a schematic structural view of the rotating mechanism of the present invention;

FIG. 3 is a schematic structural view of the striking mechanism and the connecting block I in the present invention;

fig. 4 is a schematic top view of the knocking mechanism and the connecting assembly according to the present invention;

fig. 5 is the structure diagram of the utility model with a partial section of the knocking mechanism and the connecting assembly.

Reference numbers and corresponding part names in the drawings:

1-seat body, 201-fixing plate, 202-L-shaped plate, 203-arc guide groove, 204-sliding block, 205-pushing rod I, 206-pushing rod II, 207-motor I, 208-rotating plate, 210-fixing block, 211-screw rod, 212-round rod, 213-motor II, 220-sliding plate, 221-connecting block I, 222-supporting block, 223-clamping rod, 301-round tube, 302-eccentric wheel, 303-lifting rod, 304-knocking rod, 305-knocking block, 306-supporting rod, 307-connecting block II, 308-nut II, 309-clamping block and 310-tympanic membrane (310).

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.

Examples

As shown in figures 1-5, the prenatal examination auxiliary device comprises a seat body 1 with closed armrests, and further comprises two groups of rotating mechanisms and a knocking mechanism, wherein the two groups of rotating mechanisms are respectively arranged at the armrests on the left side and the right side of the seat body 1, and the knocking mechanism is arranged between the two groups of rotating mechanisms and connected with the two groups of rotating mechanisms. The rotating mechanism of the embodiment includes a fixing plate 201 longitudinally disposed at the armrests, and the fixing plate 201 is embedded in the side walls at the armrests at both sides of the seat body 1; an L-shaped plate 202 is arranged on the fixed plate 201, and the horizontal section of the L-shaped plate 202 is rotatably connected with the fixed plate 201; be equipped with arc guide way 203 on the fixed plate 201, and arc guide way 203 runs through the left and right sides lateral wall of fixed plate 201, and the upper end of arc guide way 203 and the junction of L shaped plate 202 and fixed plate 201 are in same height, and the one end that its vertical section was kept away from to L shaped plate 202 horizontal segment is equipped with the slider 204 that matches with arc guide way 203, and slider 204 imbeds in the arc guide way 203. Wherein, the other end that slider 204 connects L shaped plate 202 end relatively rotates and is connected with a catch bar I205, and the other end of catch bar I205 is connected with a catch bar II 206, and the other end that catch bar II 206 is connected with catch bar I205 end relatively is connected with motor I207, and motor I207 is fixed on fixed plate 201. In addition, the vertical section of L shaped plate 202 is articulated to have a rotor plate 208 of vertical setting, is equipped with the lifting unit who is used for connecting the coupling assembling of knocking mechanism and is used for adjusting coupling assembling height on rotor plate 208, and coupling assembling is connected with lifting unit.

The lifting assembly of this embodiment includes two fixed blocks 210 that set up on rotor plate 208, and one of them fixed block 210 is located another fixed block 210 directly over, is equipped with vertical lead screw 211 and two round bars 212 that set up between two fixed blocks 210, and the both ends of lead screw 211 rotate with two fixed blocks 210 respectively to be connected, and the upper end of rotor plate 208 still is equipped with motor II 213, and the output shaft of motor II 213 is connected with the top of lead screw 211. Furthermore, the connecting assembly of this embodiment includes a nut i matched with the lead screw 211, a sliding plate 220 longitudinally arranged is arranged on the side wall of the nut i farthest from the rotating plate 208, and the other end of the sliding plate 220 opposite to the end connected with the nut i is connected with a vertically arranged connecting block i 221. Moreover, the sliding plate 220 is further provided with two sliding blocks, and the two sliding blocks are respectively sleeved on the two round rods 212. In addition, the other end below that connecting block I221 is connected with a supporting shoe 222 relative to connecting sliding plate 220 end, and the supporting shoe 222 top is equipped with the cylindrical chucking pole 223 of vertical setting, and chucking pole 223 upper end is equipped with the external screw thread.

The knocking mechanism comprises a circular tube 301 which is longitudinally arranged, wherein the opening surface of the circular tube 301 is provided with a tympanic membrane 310, the side wall of the circular tube 301 is provided with an eccentric wheel 302, the center of the eccentric wheel 302 is connected with a motor III, and the motor III is arranged inside the circular tube 301. The eccentric wheel 302 is provided with a lifting rod 303 arranged longitudinally, the lifting rod 303 is hinged with a knocking rod 304 relative to the ball at the other end connected with the end of the eccentric wheel 302, and the knocking rod 304 is connected with a knocking block 305 relative to the other end connected with the end of the lifting rod 303. And a support rod 306 is arranged between the knocking rod 304 and the circular tube 301 in the longitudinal direction, one end of the support rod 306 is fixed on the side wall of the circular tube 301 provided with the eardrum 310, and the other end of the support rod 306 is hinged with the knocking rod 304. In addition, the knocking mechanism further comprises two connecting blocks II 307 fixed on the left side and the right side of the circular tube 301, two connecting blocks II 307 are connected with one clamping block 309 on the other end of the circular tube 301 relatively, and the two clamping blocks 309 are provided with through holes longitudinally arranged. The knocking mechanism of the embodiment further comprises two nuts II 308, and the internal threads of the nuts II 308 are matched with the external threads on the clamping rod 223.

When the pregnant woman uses the device, the two rotating plates 208 and the parts connected with the rotating plates need to be rotated to be far away from the seat body 1, so that the pregnant woman can sit down conveniently. After the pregnant woman sits down, the rotating plate 208 is moved to be in the same straight line with the vertical section of the L-shaped plate 202, and then the two ends of the knocking assembly are connected with the two groups of connecting assemblies. In the connection process, the clamping rods 223 of the two supporting blocks 222 are respectively passed through the through holes of the two clamping blocks 309. After the knocking mechanism and the connecting assembly are connected, the motor I207 is started again, the motor III is started again after the knocking mechanism and the connecting assembly are adjusted to a proper position, the motor III rotates to drive the eccentric block to rotate, the eccentric block rotates to drive the lifting rod 303 to ascend and descend, when the lifting rod 303 ascends, one end, far away from the lifting rod 303, of the knocking rod 304 connected with the lifting rod 303 ascends, one end, far away from the lifting rod 303 descends, of the knocking membrane 310 emits sound, and the fetus is awakened to enable the fetus to adjust the posture.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The antenatal examination auxiliary device comprises a seat body (1) with closed armrests, and is characterized by also comprising two groups of rotating mechanisms which are respectively arranged at the armrests at the left side and the right side of the seat body (1) and a knocking mechanism which is arranged between the two groups of rotating mechanisms and is connected with the two groups of rotating mechanisms, the rotating mechanism comprises a fixed plate (201) which is longitudinally arranged at the armrest, an L-shaped plate (202) is arranged on the fixed plate (201), the horizontal section of the L-shaped plate (202) is rotationally connected with the fixed plate (201), an arc-shaped guide groove (203) is arranged on the fixed plate (201), the upper end of the arc-shaped guide groove (203) and the joint of the L-shaped plate (202) and the fixed plate (201) are at the same height, one end of the horizontal section of the L-shaped plate (202), which is far away from the vertical section of the L-shaped plate, is provided with a sliding block (204) matched with the arc-shaped guide groove (203), and the sliding block (204) is embedded into the arc-shaped guide groove (203); the other end, opposite to the end connected with the L-shaped plate (202), of the sliding block (204) is rotatably connected with a push rod I (205), the other end of the push rod I (205) is connected with a push rod II (206), the other end, opposite to the end connected with the push rod I (205), of the push rod II (206) is connected with a motor I (207), and the motor I (207) is fixed on the fixing plate (201); articulated on the vertical section of L shaped plate (202) have a rotor plate (208) of vertical setting, be equipped with the coupling assembling that is used for connecting knocking mechanism and be used for the lift subassembly of adjusting coupling assembling height on rotor plate (208), coupling assembling is connected with lift subassembly.

2. The prenatal examination auxiliary device as claimed in claim 1, wherein the lifting assembly comprises two fixed blocks (210) arranged on the rotating plate (208), one fixed block (210) is located right above the other fixed block (210), a vertically arranged screw rod (211) and two round rods (212) are arranged between the two fixed blocks (210), two ends of the screw rod (211) are rotatably connected with the two fixed blocks (210) respectively, a motor II (213) is further arranged at the upper end of the rotating plate (208), and an output shaft of the motor II (213) is connected with the top of the screw rod (211).

3. The prenatal examination auxiliary device as claimed in claim 2, wherein the coupling assembly comprises a nut I matched with the screw rod (211), a sliding plate (220) longitudinally arranged is arranged on the side wall of the nut I farthest from the rotating plate (208), and the other end of the sliding plate (220) opposite to the end of the coupling nut I is connected with a vertically arranged connecting block I (221); the sliding plate (220) is also provided with two sliding blocks, and the two sliding blocks are respectively sleeved on the two round rods (212).

4. The prenatal examination auxiliary device as claimed in claim 3, wherein a supporting block (222) is connected to the lower portion of the other end of the connecting block I (221) opposite to the end connected with the sliding plate (220), a vertically arranged cylindrical clamping rod (223) is arranged at the top of the supporting block (222), and an external thread is arranged at the upper end of the clamping rod (223).

5. The antenatal examination auxiliary device according to claim 1, wherein the knocking mechanism comprises a circular tube (301) which is longitudinally arranged, tympanic membranes (310) are arranged on the opening surfaces of the circular tube (301), an eccentric wheel (302) is arranged on the side wall of the circular tube (301), a motor III is connected to the center of the eccentric wheel (302), and the motor III is arranged inside the circular tube (301); the eccentric wheel (302) is provided with a lifting rod (303) which is longitudinally arranged, the lifting rod (303) is hinged with a knocking rod (304) relative to a ball at the other end connected with the end of the eccentric wheel (302), and the other end of the knocking rod (304) relative to the end connected with the lifting rod (303) is connected with a knocking block (305); a support rod (306) which is longitudinally arranged is arranged between the knocking rod (304) and the circular tube (301), one end of the support rod (306) is fixed on the side wall of the circular tube (301) provided with the tympanic membrane (310), and the other end of the support rod (306) is hinged with the knocking rod (304); the knocking mechanism further comprises connecting blocks II (307) fixed on the left side and the right side of the circular tube (301), the two connecting blocks II (307) are connected with one clamping block (309) on the other end of the circular tube (301) relatively, and the two clamping blocks (309) are provided with through holes which are longitudinally arranged.

6. A prenatal examination assistance device as claimed in claim 4, wherein the striking mechanism further comprises two nuts II (308), the internal threads of the nuts II (308) matching the external threads on the clamping bar (223).