CN103340678A

CN103340678A - Obstetric apparatus negative pressure generating device

Info

Publication number: CN103340678A
Application number: CN2013102972427A
Authority: CN
Inventors: 徐广�
Original assignee: JIANGSU KANGNUO MEDICAL DEVICES CO Ltd
Current assignee: JIANGSU KANGNUO MEDICAL DEVICES CO Ltd
Priority date: 2013-07-16
Filing date: 2013-07-16
Publication date: 2013-10-09

Abstract

The invention provides an obstetric apparatus negative pressure generating device, and belongs to the technical field of medical equipment. The obstetric apparatus negative pressure generating device comprises a negative pressure pipe with a negative pressure pipe cavity, an air inlet valve, a negative pressure display mechanism, a negative pressure continuous generating mechanism, an extraction pipe and a sucker. The air inlet valve is arranged at one end of the negative pressure pipe and is communicated with the negative pressure pipe cavity. The negative pressure display mechanism is arranged at the other end of the negative pressure pipe and is matched with the negative pressure pipe cavity. The negative pressure continuous generating mechanism is arranged on the negative pressure pipe and is communicated with the negative pressure pipe cavity. One end of the extraction pipe is connected with the negative pressure pipe and communicated with the negative pressure pipe cavity, and the sucker and the other end of the extraction pipe are connected. A damping spring is arranged at the middle position inside the negative pressure pipe cavity, one end of the damping spring is supported on the air inlet valve, and the other end of the damping spring is supported on the negative pressure display mechanism. The obstetric apparatus negative pressure generating device is high in operating efficiency, good in negative pressure continuous generating effect, convenient to operate, capable of lowering the labor intensity of medical staff, and conductive to shortening the childbirth process and giving birth to a baby quickly of a parturient.

Description

Borning aided device's depression generator

Technical field

The invention belongs to the medical devices technical field, be specifically related to a kind of borning aided device's depression generator.

Background technology

Known, clinical in medical treatment, just before giving birth the anemia of pregnant woman normally uses abdominal pressure under midwives and/or doctor's guidance, adopts air-breathing and mode that hold one's breath to increase strength of uterine contraction and with fetus crowded sending to the uterus outside, gives birth to until whole fetus.Yet because the anemia of pregnant woman is subjected to the influence of environmental factors, mental tension factor, physical factors and physiologic factor etc. when childbirth, thereby be difficult to reach and midwives, doctor between good fit tacit effect, can cause fetal asphyxia and stay sequela to the puerpera when serious.Particularly when the pileum of fetus has just exposed the uterus, owing to can't grab and pinch, thereby generally force the whole head of fetus to lean out rapidly in the mode of pushing puerpera's abdominal part, pinch whole head and shorten stages of labor in order to grab, because this practise midwifery mode is a kind of that can not flatter for industry and have a practise midwifery mode of doing something against one's will that injures fetus and undermine the anxiety of puerpera's health, thereby adopt in that department of obstetrics and gynecology are clinical double cautiously.

Utilize the practise midwifery apparatus for example obstetric forceps the stages of labor practise midwifery can help fetus head to give birth to fast to a certain extent effectively for the anemia of pregnant woman of head position does for the second time to fetus, if but error in operating process, so very easily undermine the fetus head, even can cause the fetus intracranial hemorrhage, cause baby's cerebral palsy.

Technical information about borning aided device can be seen in disclosed Chinese patent literature, typical " the novel borning aided device " who provides as " a kind of novel borning aided device " and the CN202458627U of Granted publication CN202168849U recommendation, the something in common of these two patents all has an air bag, in use air bag has been inserted the bottom, palace in puerpera uterus, and to airbag aeration, to increase the contractility in puerpera uterus, impel fetus to give birth to, shorten stages of labor.But, owing to air bag need be inserted the uterus, therefore there is following shortcoming: the one, troublesome poeration and time-consuming; The 2nd, increase puerpera's pain sensation; The 3rd, the anxiety of existence infection.

At present, department of obstetrics and gynecology are clinical, and to run into the highest puzzlement of probability be that aforesaid pileum fetus can't be grabbed by midwives, doctor when exposing the uterus and pinched, and if consuming time long in this stage, very easily cause fetal asphyxia.Puzzled in view of this, in Chinese patent literature, disclose the borning aided device to the fetus head vacuum suction, typical " the intelligent borning aided device " who introduces as Granted publication CN2756164Y, this patent scheme is attached to sucker the pileum (position, the crown) of the fetus that just exposes the uterus in use, then by the operation to negative pressure generator, make sucker produce negative pressure and under medical worker's pulling, fetus is pulled out from intrauterine, specifically can be capable to page 4 the 6th referring to the 2nd section of the Instructions Page 3 of this patent.But there is following shortcoming in this patent scheme: because the mode that adopts syringe to bleed makes sucker produce negative pressure, therefore reciprocal operating syringe, because whenever the piston (namely being used to claim cylinder piston) of syringe towards the direction drawing that deviates from syringe cavity once, just will be to the negative pressure control valve operation once, in order to make the piston of syringe push syringe cavity once again, open negative pressure control valve again, then again with piston towards the direction drawing that deviates from syringe cavity, so make sucker produce required negative pressure effect repeatedly.So not only troublesome poeration, and operating efficiency is lower and negative pressure generation weak effect.

In view of above-mentioned prior art, be necessary rationally to be improved, for this reason, the applicant has done useful design, has formed technical scheme described below finally.

Summary of the invention

Task of the present invention is to provide a kind of and helps mode with continued operation to be used in the exhaust tube continuous air extraction that is connected with sucker and use and embody operating efficiency height, easy to operate and negative pressure generation effect excellent and can significantly alleviate borning aided device's depression generator of medical worker's manipulation strength.

Task of the present invention is finished like this, and a kind of borning aided device's depression generator comprises the negative pressure pipe with negative pressure tube chamber; One intake valve, this intake valve are arranged on an end of negative pressure pipe, and communicate with the negative pressure tube chamber; One negative pressure pressure indication mechanism, this negative pressure pressure indication mechanism is arranged on the other end of negative pressure pipe, and matches with the negative pressure tube chamber; One negative pressure recurs mechanism, and this negative pressure recurs mechanism and is arranged on the described negative pressure pipe, and communicates with the negative pressure tube chamber; One exhaust tube and a sucker, one end of exhaust tube is connected with the negative pressure pipe and communicates with the negative pressure tube chamber, sucker is connected with the other end of exhaust tube, wherein: in described negative pressure tube chamber and the middle position that is positioned at the length direction of negative pressure tube chamber be provided with a damping spring, one end bearing of this damping spring is on described intake valve, and the other end is bearing on the described negative pressure pressure indication mechanism.

In a specific embodiment of the present invention, at the described end of described negative pressure pipe and be positioned at described negative pressure tube chamber and constitute an intake valve mount pad, described intake valve is installed on this intake valve mount pad, described negative pressure pressure indication mechanism comprises negative pressure scale piston, piston packing and negative pressure scale, negative pressure scale piston is arranged in the negative pressure tube chamber of described negative pressure pipe, constitute a piston seal ring recess at this negative pressure scale piston, and negative pressure scale piston on the end face of an end of described intake valve and the middle position that is positioned at this end face constitute a spring-loaded hole, piston packing is nested with in the piston seal ring recess, and be sealed and matched with the chamber wall of negative pressure tube chamber, one end of negative pressure scale and negative pressure scale piston are fixed, the other end is stretched over outside the negative pressure tube chamber, and be provided with the negative pressure scale mark, the described other end of described damping spring is to probe into state support in the described spring-loaded hole on negative pressure scale piston.

In another specific embodiment of the present invention, described negative pressure recurs mechanism and comprises first, second bourdon tube, air inlet pipe, fixed piston, extraction valve, air bleeding valve and pump cover, first bourdon tube directly is formed on the outer wall of a described end of described negative pressure pipe, this first bourdon tube has one first spring tube chamber, second bourdon tube directly is formed on the outer wall of the described other end of negative pressure pipe, this second bourdon tube has one second spring tube chamber, this is first years old, second bourdon tube is vertically parallel each other, and constitute vertical relation with the negative pressure pipe, air inlet pipe directly is formed on the outer wall of negative pressure pipe, and be positioned at first, between second bourdon tube, the air inlet tube chamber of this air inlet pipe communicates with described negative pressure tube chamber, fixed piston is fixed on the negative pressure pipe with airborne, and corresponding to first, between second bourdon tube, offer an aspirating hole and a steam vent at this fixed piston, wherein, aspirating hole is corresponding with described air inlet pipe, and communicate with the air inlet tube chamber, and the position of steam vent on fixed piston is positioned at fixed piston towards an end of first bourdon tube or towards an end of second bourdon tube, extraction valve corresponding to the location positioning of aspirating hole in the side of fixed piston back to described negative pressure pipe, air bleeding valve corresponding to the location positioning of steam vent in the side of fixed piston towards described negative pressure pipe, this air bleeding valve and extraction valve form back-to-back relation, pump cover constitutes a fixed piston chamber, the chamber wall in described fixed piston and this fixed piston chamber is sealed and matched, end at this pump cover constitutes one first spring cavity, in this first spring cavity, constitute one first spring guide pillar, this first spring guide pillar is inserted the first bourdon tube intracavity, and be arranged with an end of one first spring at this first spring guide pillar, and the other end of first spring is placed in the first bourdon tube intracavity of described first bourdon tube, the other end at pump cover constitutes one second spring cavity, in this second spring cavity, constitute one second spring guide pillar, this second spring guide pillar is inserted the second bourdon tube intracavity, and be arranged with an end of one second spring at this second spring guide pillar, and the other end of second spring is placed in the second bourdon tube intracavity of described second bourdon tube, wherein: an end of described fixed piston is fixed on the top of first fixed leg, the other end is fixed on the top of second fixed leg, and first fixed leg and second fixed leg directly are formed on the outer wall of described negative pressure pipe, and be positioned at described first, between second bourdon tube, and described air inlet pipe is positioned at first, between second fixed leg.

In another specific embodiment of the present invention, on described fixed piston and respectively constituting a pair of location embedding foot corresponding to described aspirating hole and corresponding to the position of described steam vent and with aspectant state, described extraction valve is positioned on the described a pair of location embedding foot corresponding to the position of described aspirating hole, and a pair of of position that described air bleeding valve is positioned at corresponding to described steam vent is positioned on the embedding foot.

In another specific embodiment of the present invention, on described fixed piston and at an end and the other end back to the surface of a side of described negative pressure pipe, respectively constitute a defining flange, and the lateral margin at fixed piston constitutes a fixed piston seal groove, be equipped with a fixed piston sealing ring in this fixed piston seal groove, the chamber wall in the fixed piston chamber of this fixed piston sealing ring and described pump cover is sealed and matched.

Also have in the specific embodiment of the present invention, described extraction valve comprises the valve seat and of the bleeding valve block of bleeding, respectively constitute the valve seat positioning embeded groove of bleeding at the two ends of the valve seat of bleeding, bleed the valve seat positioning embeded groove with chimeric fixing corresponding to the described location embedding foot at the position of described aspirating hole, constitute the valve seat gas port of bleeding at the middle part of the valve seat of bleeding, this valve seat gas port of bleeding is corresponding with described aspirating hole, the valve block of bleeding is arranged on quick condition and is formed on the valve seat of bleeding and the bleed valve block intracavity corresponding with the valve seat gas port of bleeding, and this valve block of bleeding is corresponding with described aspirating hole.

More of the present invention and in specific embodiment, described air bleeding valve comprises a delivery valve seat and an exhaust valve plate, respectively constitute a delivery valve seat positioning embeded groove at the two ends of delivery valve seat, the delivery valve seat positioning embeded groove is with chimeric fixing corresponding to the described a pair of location embedding foot at the position of described steam vent, constitute the delivery valve seat gas port at the middle part of delivery valve seat, this delivery valve seat gas port is corresponding with described steam vent, exhaust valve plate is arranged on quick condition and is formed in exhaust valve plate intracavity on the delivery valve seat and corresponding with the delivery valve seat gas port, and this exhaust valve plate is corresponding with described steam vent.

In of the present invention and then specific embodiment, on described negative pressure pipe and in the position corresponding to the described end of described exhaust tube, constitute an exhaust tube joint, the exhaust tube joint chamber of this exhaust tube joint communicates with described negative pressure tube chamber, a described end of exhaust tube and the inserting of exhaust tube joint, and the tube chamber of bleeding of exhaust tube communicates with exhaust tube joint chamber, on described sucker and back to the side in sucker chamber, constitute the exhaust tube groove of stepping down, and constitute a bulging flange at the sucker intracavity and in the position of the groove of stepping down corresponding to exhaust tube, offer an aspirating hole that communicates with the sucker chamber at this bulging flange, the described other end of described exhaust tube is corresponding with aspirating hole and communicate with aspirating hole.

Technical scheme provided by the invention can recur the continued operation of mechanism and make the negative pressure tube chamber of negative pressure pipe be in negative pressure state quickly negative pressure, make sucker be in negative pressure state through exhaust tube, thereby held by the pileum of sucker to fetus, so that the medical worker is by applying pulling force and the head of fetus is pulled out the uterus sucker, thereby have operating efficiency height, negative pressure and recur effective, easy to operate and can alleviate the strong point of medical worker's manipulation strength, and help the puerpera to shorten the childbirth journey, baby fast gives birth to.

Description of drawings

Fig. 1 is the embodiments of the invention structure chart.

Fig. 2 is the detailed structure view of intake valve of the present invention.

Fig. 3 matches with the fetus head for sucker of the present invention and sucker is exported sketch map when applying pulling force.

The specific embodiment

For the auditor that the makes Patent Office especially public can be expressly understood technical spirit of the present invention and beneficial effect more, the applicant general elaborates in the mode of embodiment below, but all be not restriction to the present invention program to the description of embodiment, any according to the present invention's design done only for pro forma but not substantial equivalent transformation all should be considered as technical scheme category of the present invention.

Embodiment:

See also Fig. 1, provided a preferred for example negative pressure pipe 1 of engineering plastics (ABS) making of plastics that adopts, this negative pressure pipe 1 constitutes a negative pressure tube chamber 11.Be the left end of location status shown in Figure 1 and be positioned at negative pressure tube chamber 11 and constitute an intake valve mount pad 12 at an end of negative pressure pipe 1, and the other end of negative pressure pipe 1 is the right-hand member of location status shown in Figure 1 and is positioned at and offers a scale resigning hole 15 on the end face.Side at the length direction of negative pressure pipe 1 is that the downside of location status shown in Figure 1 and the position placed in the middle that is positioned at length direction substantially constitute an exhaust tube joint 14, and the exhaust tube joint chamber 141 of this exhaust tube joint 14 communicates with negative pressure tube chamber 11.

Ask for an interview Fig. 2 and in conjunction with Fig. 1, provided an intake valve 2, this intake valve 2 is fixed on the aforesaid intake valve mount pad 12 with horizontally-arranged state, and communicate with negative pressure tube chamber 11, intake valve 2 preferably but not the structure that definitely is limited to is as follows: comprise valve body 21, valve rod 22, spring 23 and air inlet button 24, valve body 21 is fixing with intake valve holder 12, this valve body 21 is made of jointly the valve pocket pipeline section 211 of right-hand member and the valve rod pipeline section 212 of left end, valve pocket pipeline section 211 constitutes a valve pocket 2111, this valve pocket 2111 communicates with negative pressure tube chamber 11, the valve rod pipeline section 212 of stepping down constitutes the valve rod chamber 2121 of stepping down, step down at valve pocket 2111 and valve rod and to constitute a sealing ring between the chamber 2121 and stop that step circle 213(also can directly be called sealing ring sealed step circle), stop that at the sealing circle middle position of step circle 213 offers one and be used for to connect the step down through hole 2131 in chamber 2121 of valve pocket 2111 and valve rod, this through hole 2131 is essentially the valve rod resigning hole.Again, constitute a valve body mounting flange limit 214 that is raised in the outer surface of valve body 21 on the outer wall of valve body 21 and in the position that stops step circle 213 corresponding to sealing ring, these valve body mounting flange limit 214 preferred adhesive and aforesaid intake valve mount pads 12 of using are fixed.One end of valve rod 22 is that illustrated left end is stretched over valve rod and steps down in the chamber 2121 after through hole 2131 is namely being passed in the position that stops the aforementioned through-hole 2131 on the step circle 213 corresponding to sealing ring, and being illustrated right-hand member, the other end of valve rod 22 is positioned at valve pocket 2111, and be equipped with a valve stem packing ring 221 at this other end, this valve stem packing ring 221 stops that with aforementioned sealing ring step circle 213 matches towards a side of valve pocket 2111.Valve rod spring 23 is positioned at valve pocket 2111, and be nested with the aforementioned other end (right-hand member) at valve rod 22, one end of this valve rod spring 23 (diagram left end) is bearing on the spring-loaded boss 222 that is formed on the valve rod 22, and the other end of valve rod spring 23 is bearing on the chamber diapire of valve pocket 2111.Air inlet button 24 constitutes valve rod connector 241 towards a side of valve rod 22, valve rod connector 241 has a valve rod and probes into chamber 2411(Fig. 1 and show), this valve rod probes into chamber 2411 and cooperates with an aforementioned end (left end) of valve rod 22, that is to say that the left end insertion valve rod of valve rod 22 probes in the chamber 2411.Shown in figure, aforesaid valve stem packing ring 221 stops between step circle 213 and the spring-loaded boss 222 at sealing ring in the position on the valve rod 22.

When promoting air inlet button 24, drive valve rod 22 to the direction displacement of valve pocket 2111, make valve stem packing ring 221 leave sealing ring and stop step circle 213, namely remove and stop cooperating of step circle 213 with sealing ring, outside air just enters valve pocket 2111 from through hole 2131, because valve pocket 2111 communicates with negative pressure tube chamber 11, so previous residing negative pressure state is disengaged along with the introducing of outside air in the negative pressure tube chamber 11, and vice versa.

Provided the negative pressure pressure indication mechanism 3 of the right-hand member (location status shown in Figure 1) that is arranged on negative pressure pipe 1, this negative pressure pressure indication mechanism 3 comprises negative pressure scale piston 31, piston packing 32 and negative pressure scale 33, negative pressure scale piston 31 is arranged in the negative pressure tube chamber 11 of negative pressure pipe 1, on this negative pressure scale piston 31 and around its circumferencial direction, constitute a piston seal ring recess 311, piston packing 32 is nested with in this piston seal ring recess 311, and constitutes between the chamber wall of this piston packing 32 and negative pressure tube chamber 11 and be sealed and matched.One end of negative pressure scale 33 (left end shown in Figure 1) is fixing with negative pressure scale piston 31, and the other end is stretched over outside the negative pressure tube chamber 11 through aforesaid scale resigning hole 15, and is provided with negative pressure scale mark 331 at this other end.

Preferably, one damping spring 13 is set in the negative pressure tube chamber 11 of aforementioned negative pressure pipe 1, one end of this damping spring 13 (illustrated left end) is bearing on the intake valve 2, more precisely be bearing on the damping spring seat 2112 that the terminal narrow contracting of (being nested with) aforementioned valve pocket pipeline section 211 forms, the other end of damping spring 13 (diagram right-hand member) is bearing in negative pressure scale piston 31 towards an end of intake valve 2.As preferred scheme, also can offer a spring-loaded hole 312 towards the middle position of the end face of an end of intake valve 2 at negative pressure scale piston 31, the aforementioned other end of damping spring 13 is supported in this spring-loaded hole 312.

The negative pressure that will describe recurs under the action of mechanism 4 below, negative pressure pressure in the negative pressure tube chamber 11 is shown by this negative pressure pressure indication mechanism 3, for example, when the negative pressure pressure in the negative pressure tube chamber 11 increases gradually, negative pressure scale piston 31 is (state shown in Figure 1) displacement just gradually left, namely towards the direction displacement of intake valve 2, drive negative pressure scale 33 synchronous shift by negative pressure scale piston 31, thereby disclose force value (negative pressure force value) by the negative pressure scale mark 331 on the negative pressure scale 33, use and avoid blindness.When removing the negative pressure in the negative pressure tube chamber 11, so as long as the promotion air inlet button of saying when in the above intake valve 2 being described by the applicant 24, make outside air enter negative pressure tube chamber 11, discharging under air inlet button 24 and the return action power at damping spring 13, negative pressure scale piston 31 is reset to by present state shown in Figure 1.

Please see Fig. 1 by emphasis, above mentioned negative pressure recurs mechanism 4 and comprises first, second bourdon tube 41,42, air inlet pipe 43, fixed piston 44, extraction valve 45, air bleeding valve 46 and pump cover 47, first bourdon tube 41 extends on the outer wall of an end (left end) that is formed in aforementioned negative pressure pipe 1, this first bourdon tube 41 has one first spring tube chamber 411, second bourdon tube 42 is formed on the outer wall of the aforementioned other end (right-hand member) of negative pressure pipe 1, this second bourdon tube 42 has one second spring tube chamber 421, first, second bourdon tube 41,42 is vertically parallel each other, and and negative pressure pipe 1 between constitute vertical relation.Air inlet pipe 43 is formed on the outer wall of negative pressure pipe 1, and between first, second bourdon tube 41,42, the air inlet tube chamber 431 of this air inlet pipe 43 communicates with aforementioned negative pressure tube chamber 11.Fixed piston 44 is fixed on the negative pressure pipe 1 with airborne, specifically: an end of fixed piston 44 is the top that left end is fixed on first fixed leg 446, the other end of fixed piston 44 is the top that right-hand member is fixed on second fixed leg 447, and first, second fixed leg 446,447 directly is formed on the outer wall of negative pressure pipe 1.Because first, second fixed leg 446,447 is between first, second bourdon tube 41,42, so fixed piston 44 is between first, second bourdon tube 41,42, and aforesaid air inlet pipe 43 is between first, second fixed leg 446,447.By shown in Figure 1, offer an aspirating hole 441 and a steam vent 442 at fixed piston 44, wherein, aspirating hole 441 is corresponding with aforementioned air inlet pipe 43, and communicates with air inlet tube chamber 431.In the present embodiment, the position of steam vent 442 on fixed piston 44 is positioned at fixed piston 44 towards an end of second bourdon tube 42, namely is positioned at the right-hand member of fixed piston 44.If yet steam vent 442 is transferred to fixed piston 44 towards an end of first bourdon tube 41, namely be positioned at the left end of fixed piston 44, should be considered as equivalence so and substitute and still belong to technology contents category disclosed by the invention.Air bleeding valve 45 corresponding to the location positioning of aspirating hole 441 in the side of fixed piston 44 back to negative pressure pipe 1, namely fix (state shown in Figure 1) with fixed piston 44 towards a last side.Air bleeding valve 46 corresponding to the location positioning of steam vent 442 in the side of fixed piston 44 towards negative pressure pipe 1, namely with fixed piston 44 towards under a side fix (state shown in Fig. 1).This air bleeding valve 46 forms back-to-back relation with extraction valve 45.Pump cover 47 constitutes a fixed piston chamber 471, and aforesaid fixed piston 44 is sealed and matched with the chamber wall in this fixed piston chamber 471.By shown in Figure 1, end (left end) at pump cover 47 constitutes one first spring cavity 472, in this first spring cavity 472, constitute one first spring stack 4721, this first spring stack 4721 is inserted in the first spring tube chamber 411, and be arranged with the end (upper end) of one first spring 47211 at this first spring stack 4721, and the other end of first spring 47211 (lower end) is placed in the first spring tube chamber 411 of first bourdon tube 41; The other end (right-hand member) at pump cover 47 constitutes one second spring cavity 473, in this second spring cavity 473, constitute one second spring stack 4731, this second spring stack 4731 is inserted in the second spring tube chamber 421, and be arranged with the end (upper end) of one second spring 47311 at this second spring stack 4731, and the other end of second spring 47311 (lower end) is placed in the second spring tube chamber 421 of second bourdon tube 42.

Continue to see Fig. 1, on aforesaid fixed piston 44 and corresponding to aspirating hole 441 and corresponding to the position of steam vent 442 and all respectively constitute a pair of location embedding foot 443 with aspectant state, in the drawings, though the not shown a pair of location embedding foot 443 that faces each other that is positioned at steam vent 442 places of applicant can be according to being fully understood corresponding to a pair of location embedding foot 443 that faces each other at aspirating hole 441 places.Aforesaid extraction valve 45 location are fixed between a pair of location embedding foot 443 corresponding to the position of aspirating hole 441 shortly, and aforesaid air bleeding valve 46 location are fixed between a pair of location embedding foot 443 corresponding to the position of steam vent 442 shortly.

By shown in Figure 1, on fixed piston 44 and at an end and the other end back to the surface of a side of negative pressure pipe 1, respectively constitute a defining flange 444, and the lateral margin at fixed piston 44 constitutes a fixed piston seal groove 445, in this fixed piston seal groove 445, be equipped with a fixed piston sealing ring 4451, be sealed and matched by the chamber wall of this fixed piston sealing ring 4451 with the fixed piston chamber 471 of aforementioned pump cover 47.

Above mentioned extraction valve 45 comprises the valve seat 451 and of the bleeding valve block 452 of bleeding, respectively constitute the valve seat positioning embeded groove 4511 of bleeding at the two ends of the valve seat 451 of bleeding, the valve seat positioning embeded groove 4511 of bleeding is chimeric fixing with the aforesaid a pair of location embedding foot 443 corresponding to the position of aspirating hole 441.Middle part at the valve seat 451 of bleeding constitutes the valve seat gas port 4512 of bleeding, this valve seat gas port 4512 of bleeding is corresponding with aforesaid aspirating hole 441, bleed valve block 452 with quick condition (unfixed mode) be arranged on be formed on the valve seat 451 of bleeding and corresponding with the valve seat gas port 4512 of the bleeding valve block chamber 4513 of bleeding in, this valve block 452 of bleeding is corresponding with aspirating hole 441.

And then by shown in Figure 1, air bleeding valve 46 comprises a delivery valve seat 461 and one piece of exhaust valve plate 462, respectively constitute a delivery valve seat positioning embeded groove 4611 at the two ends of delivery valve seat 461, delivery valve seat positioning embeded groove 4611 is chimeric fixing with the aforesaid a pair of location embedding foot 443 corresponding to the position of steam vent 442.Constitute delivery valve seat gas port 4612 at the middle part of delivery valve seat 461, this delivery valve seat gas port 4612 is corresponding with aforesaid steam vent 442, exhaust valve plate 462 with quick condition (in unfixed mode) be arranged on be formed on the delivery valve seat 461 and corresponding with delivery valve seat gas port 4612 exhaust valve plate chamber 4613 in, this exhaust valve plate 462 is corresponding with steam vent 442.

The function of above mentioned defining flange 444 is protection extraction valves 45; in order to avoid when pump cover is pressed for 47 times the spacing and crushing valve seat 45 of bleeding for want of; and the related valve block 452 of bleeding that undermines; therefore, preferred scheme is the height of defining flange 444 namely to be gone up the plane and the upper surface of the valve seat 451 of bleeding is consistent.

Please still see Fig. 1, an exhaust tube 5 and a sucker 6 have been provided, one end of exhaust tube 5 is insinuated in the aforesaid exhaust tube joint 14, and the tube chamber 51 of bleeding of this exhaust tube 5 communicates (exhaust tube joint chamber 141 communicates with negative pressure tube chamber 11) with aforesaid exhaust tube joint chamber 141, and sucker 6 is connected with the other end of exhaust tube 5.

By shown in Figure 1, on sucker 6 and in the side back to sucker chamber 61, constitute the exhaust tube groove 62 of stepping down, and in sucker chamber 61 and in the position of the cavity 62 of stepping down corresponding to exhaust tube, constitute a bulging flange 63, offer an aspirating hole 631 that communicates with sucker chamber 61 at this bulging flange 63, the other end of aforementioned exhaust tube 5 and aspirating hole 631 are corresponding and communicate with aspirating hole 631.According to common practise, aforesaid bulging flange 63 comes down to be formed by the step down material transfer at groove 62 places of exhaust tube.

Preferably, in the tube chamber 51 of bleeding of aforesaid exhaust tube 5, be equipped with a pull rope 7, one end of this pull rope 7 leans out an end of exhaust tube 5 and a pull rope fixing head 71 is fixedly arranged, this pull rope fixing head 71 is placed in the aforesaid exhaust tube joint chamber 141, and the chamber diapire by exhaust tube joint chamber 141 limits pull rope fixing head 71, thereby an end of pull rope 7 is connected with exhaust tube joint 14, and the other end of pull rope 7 is being fixed on the aforesaid bulging flange 63 behind the other end that leans out exhaust tube 5.

Aforesaid pull rope 7 adopts the rope silk, namely adopts steel wire rope, because the intensity of exhaust tube 5 is relatively low, is difficult to stand traction and pulls, and therefore just can satisfy the traction requirement of sucker 6 under negative pressure state after implanting the pull rope of being filled the post of by steel wire 7.

Preferably, be provided with a protective pad 6 in aforesaid sucker chamber 61, this protective pad 6 namely adopts foam-rubber cushion, so that by the head skin care of this foam-rubber cushion to fetus for having the ventilative protective pad of airing function.

Application examples:

Ask for an interview Fig. 3 and continuation in conjunction with Fig. 1 and Fig. 2, when will head 8(Fig. 3 of the fetus that just exposes the uterus being shown) during traction, by midwives or doctor sucker 6 is placed into head 8 so, press pump cover 47 repeatedly by midwives or other related personnel, be example with location status shown in Figure 1, when pump cover 47 is pressed downwards, then the valve block 452 of bleeding of extraction valve 45 is closed, and the exhaust valve plate 462 of air bleeding valve 46 is opened, at this moment, advance into air in fixed piston chamber 471 earlier just from exhaust valve plate 462 aerofluxuss of steam vent 442 through opening.When under first, second spring 47211,47311 return action power and when making pump cover 47 to top offset, exhaust valve plate 462 is closed, and the valve block 452 of bleeding is opened, this moment, negative pressure tube chamber 11 interior air entered fixed piston chamber 471 through air inlet tube chamber 431, the aspirating hole 441 of air inlet pipe 43 and the valve seat gas port 4512 of bleeding, when pressing down pump cover 47 again, the air that advances into earlier in the fixed piston chamber 471 drains into the external world through steam vent 442, exhaust valve plate 462 and delivery valve seat gas port 4612 successively.In this process, because exhaust tube 5 is connected between negative pressure pipe 1 and the sucker 6, therefore the air in the sucker chamber 61 enters negative pressure tube chamber 11 through the tube chamber 51 of bleeding of exhaust tube 5, until make sucker 6 reliably adhesive be head in the head 8(of fetus), pressure in the negative pressure tube chamber 11 is disclosed by the negative pressure scale, after reaching required negative pressure value according to requiring, just can be by midwives or doctor across 7 tractions of 5 pairs of pull ropes of exhaust tube, in order to the head 8 puerpera uterus of giving birth to fast.When needing negative pressure tube chamber 11 releases of pressure after finishing using, as long as push away the air inlet button 24 of (pressing) moving intake valve 2 so.

In sum, technical scheme provided by the invention has remedied the shortcoming in the prior art, finished the invention task, embodied the technique effect in the superincumbent technique effect of the applicant hurdle, can yet be regarded as is a ultimate attainment technical scheme that is able in the department of obstetrics and gynecology clinical practice.

Claims

1. A kind of borning aided device's depression generator is characterized in that comprising the negative pressure pipe (1) with negative pressure tube chamber (11); One intake valve (2), this intake valve (2) is arranged on an end of negative pressure pipe (1), and communicates with negative pressure tube chamber (11); One negative pressure pressure indication mechanism (3), this negative pressure pressure indication mechanism (3) is arranged on the other end of negative pressure pipe (1), and matches with negative pressure tube chamber (11); One negative pressure recurs mechanism (4), and this negative pressure recurs mechanism (4) and is arranged on the described negative pressure pipe (1), and communicates with negative pressure tube chamber (11); One exhaust tube (5) and a sucker (6), one end of exhaust tube (5) is connected with negative pressure pipe (1) and communicates with negative pressure tube chamber (11), sucker (6) is connected with the other end of exhaust tube (5), wherein: in described negative pressure tube chamber (11) and the middle position that is positioned at the length direction of negative pressure tube chamber (11) be provided with a damping spring (13), one end bearing of this damping spring (13) is on described intake valve (2), and the other end is bearing on the described negative pressure pressure indication mechanism (3).

2. Borning aided device's depression generator according to claim 1, it is characterized in that at the described end of described negative pressure pipe (1) and be positioned at described negative pressure tube chamber (11) constituting an intake valve mount pad (12), described intake valve (2) is installed on this intake valve mount pad (12), described negative pressure pressure indication mechanism (3) comprises negative pressure scale piston (31), piston packing (32) and negative pressure scale (33), negative pressure scale piston (31) is arranged in the negative pressure tube chamber (11) of described negative pressure pipe (1), constitute a piston seal ring recess (311) at this negative pressure scale piston (31), and negative pressure scale piston (31) on the end face of an end of described intake valve (2) and the middle position that is positioned at this end face constitute a spring-loaded hole (312), piston packing (32) is nested with in piston seal ring recess (311), and be sealed and matched with the chamber wall of negative pressure tube chamber (11), one end of negative pressure scale (33) and negative pressure scale piston (31) are fixing, the other end is stretched over outside the negative pressure tube chamber (11), and be provided with negative pressure scale mark (331), the described other end of described damping spring (13) is to probe into the interior state support in described spring-loaded hole (312) on negative pressure scale piston (31).

3. Borning aided device's depression generator according to claim 1, it is characterized in that described negative pressure recurs mechanism (4) and comprises first, second bourdon tube (41,42), air inlet pipe (43), fixed piston (44), extraction valve (45), air bleeding valve (46) and pump cover (47), first bourdon tube (41) directly is formed on the outer wall of a described end of described negative pressure pipe (1), this first bourdon tube (41) has one first spring tube chamber (411), second bourdon tube (42) directly is formed on the outer wall of the described other end of negative pressure pipe (1), this second bourdon tube (42) has one second spring tube chamber (421), this is first years old, second bourdon tube (41,42) vertically parallel each other, and constitute vertical relation with negative pressure pipe (1), air inlet pipe (43) directly is formed on the outer wall of negative pressure pipe (1), and be positioned at first, second bourdon tube (41,42) between, the air inlet tube chamber (431) of this air inlet pipe (43) communicates with described negative pressure tube chamber (11), fixed piston (44) is fixed on the negative pressure pipe (1) with airborne, and corresponding to first, second bourdon tube (41,42) between, offer an aspirating hole (441) and a steam vent (442) at this fixed piston (44), wherein, aspirating hole (441) is corresponding with described air inlet pipe (43), and communicate with air inlet tube chamber (431), and the position of steam vent (442) on fixed piston (44) is positioned at fixed piston (44) towards an end of first bourdon tube (41) or towards an end of second bourdon tube (42), extraction valve (45) corresponding to the location positioning of aspirating hole (441) in the side of fixed piston (44) back to described negative pressure pipe (1), air bleeding valve (46) corresponding to the location positioning of steam vent (442) in the side of fixed piston (44) towards described negative pressure pipe (1), this air bleeding valve (46) forms back-to-back relation with extraction valve (45), pump cover (47) constitutes a fixed piston chamber (471), described fixed piston (44) is sealed and matched with the chamber wall in this fixed piston chamber (471), end at this pump cover (47) constitutes one first spring cavity (472), in this first spring cavity (472), constitute one first spring guide pillar (4721), this first spring guide pillar (4721) is inserted in the first spring tube chamber (411), and be arranged with an end of one first spring (4721) at this first spring guide pillar (4721), and the other end of first spring (47211) is placed in the first spring tube chamber (411) of described first bourdon tube (41), the other end at pump cover (47) constitutes one second spring cavity (473), in this second spring cavity (473), constitute one second spring guide pillar (4731), this second spring guide pillar (4731) is inserted in the second spring tube chamber (421), and be arranged with an end of one second spring (47311) at this second spring guide pillar (4731), and the other end of second spring (47311) is placed in the second spring tube chamber (421) of described second bourdon tube (42), wherein: an end of described fixed piston (44) is fixed on the top of first fixed leg (446), the other end is fixed on the top of second fixed leg (447), and first fixed leg (446) and second fixed leg (447) directly are formed on the outer wall of described negative pressure pipe (1), and be positioned at described first, second bourdon tube (41,42) between, and described air inlet pipe (43) is positioned at first, second fixed leg (446,447) between.

4. Borning aided device's depression generator according to claim 3, it is characterized in that going up and respectively constituting a pair of location embedding foot (443) corresponding to described aspirating hole (441) and corresponding to the position of described steam vent (442) and with aspectant state at described fixed piston (44), described extraction valve (45) is positioned on the described a pair of location embedding foot (443) corresponding to the position of described aspirating hole (441), and a pair of of position that described air bleeding valve (46) is positioned at corresponding to described steam vent (442) is positioned on the embedding foot (443).

5. Borning aided device's depression generator according to claim 3, it is characterized in that going up and respectively constituting a defining flange (444) at an end and the other end back to the surface of a side of described negative pressure pipe (1) at described fixed piston (44), and the lateral margin at fixed piston (44) constitutes a fixed piston seal groove (445), be equipped with a fixed piston sealing ring (4451) in this fixed piston seal groove (445), this fixed piston sealing ring (4451) is sealed and matched with the chamber wall in the fixed piston chamber (471) of described pump cover (47).

6. Borning aided device's depression generator according to claim 4, it is characterized in that described extraction valve (45) comprises the valve seat of bleeding (451) and a valve block (452) of bleeding, respectively constitute the valve seat positioning embeded groove (4511) of bleeding at the two ends of the valve seat of bleeding (451), bleed valve seat positioning embeded groove (4511) with chimeric fixing corresponding to the described location embedding foot (443) at the position of described aspirating hole (441), constitute the valve seat gas port (4512) of bleeding at the middle part of the valve seat of bleeding (451), this valve seat gas port (4512) of bleeding is corresponding with described aspirating hole (441), bleed valve block (452) with quick condition be arranged on be formed on the valve seat of bleeding (451) and corresponding with the valve seat gas port (4512) of the bleeding valve block chamber (4513) of bleeding in, this valve block of bleeding (452) is corresponding with described aspirating hole (441).

7. Borning aided device's depression generator according to claim 4, it is characterized in that described air bleeding valve (46) comprises a delivery valve seat (461) and an exhaust valve plate (462), respectively constitute a delivery valve seat positioning embeded groove (4611) at the two ends of delivery valve seat (461), delivery valve seat positioning embeded groove (4611) is with chimeric fixing corresponding to the described a pair of location embedding foot (443) at the position of described steam vent (442), constitute delivery valve seat gas port (4612) at the middle part of delivery valve seat (461), this delivery valve seat gas port (4612) is corresponding with described steam vent (442), exhaust valve plate (462) is arranged on quick condition and is formed in the exhaust valve plate chamber on the delivery valve seat (461) and corresponding with delivery valve seat gas port (4612) (4613), and this exhaust valve plate (462) is corresponding with described steam vent (442).

8. Borning aided device's depression generator according to claim 1, it is characterized in that going up and constituting an exhaust tube joint (14) in the position corresponding to the described end of described exhaust tube (5) at described negative pressure pipe (1), the exhaust tube joint chamber (141) of this exhaust tube joint (14) communicates with described negative pressure tube chamber (11), a described end of exhaust tube (5) and exhaust tube joint (14) inserting, and the tube chamber of bleeding (51) of exhaust tube (5) communicates with exhaust tube joint chamber (141), go up and constitute the exhaust tube groove (62) of stepping down back to the side of sucker chamber (61) at described sucker (6), and in sucker chamber (61) and in the position of the groove (62) of stepping down corresponding to exhaust tube, constitute a bulging flange (63), offer an aspirating hole (631) that communicates with sucker chamber (61) at this bulging flange (63), the described other end of described exhaust tube (5) is corresponding with aspirating hole (631) and communicate with aspirating hole (631)