CN110063777A - A kind of telescopic vacuum extractor of novel gynecological - Google Patents

Abstract

A kind of novel gynecological of the present invention discloses a kind of gathering for dynamic flexible vacuum extractor of the exhibition crossed belt by multiple exhaust tubes with telescopic vacuum extractor, pre- clamping is formed to fetal head, it is evacuated in cooperation exhaust tube, uniformly distributed suction is formed in fetal head position, and then form the vacuum extractor that second level clamping absorption mode carries out stable holding, it is characterized in that drive shell and extension pipe one end socket-connect, the drive shell is built-in with vortex fan, gripping handle is equipped on the outside of the drive shell, it is described to hold being above equipped with battery, and it is connected by power supply line with vortex fan, it is described to hold the power switch for being above equipped with control vortex fan power on/off, second connector sleeve one end and the extension pipe other end socket-connect, connecting rod one end and the second connector sleeve other end socket-connect, second connector sleeve is built-in with demarcation plate, and it is located at and connects Between extension bar and second connector sleeve one end, threaded rod one end and it is hinged by articulated shaft and the connecting rod other end.

Description

A kind of telescopic vacuum extractor of novel gynecological

Technical field

The telescopic vacuum extractor of a kind of novel gynecological of the invention is related to what a kind of gynemetrics used, to fetal head There is the vacuum extractor that the second level clamping clamped in advance attracts in portion, belong to field of medical device.In particular to a kind of by multiple The dynamic flexible vacuum extractor of the exhibition crossed belt of exhaust tube is gathered, and forms pre- clamping to fetal head, cooperates and be evacuated in exhaust tube, Fetal head position forms uniformly distributed suction, and then forms the vacuum extractor that second level clamping absorption mode carries out stable holding.

Background technique

Currently, needing to take vacuum extraction of fetal head when gynemetrics carries out childbirth midwifery, by ensuring fetus to fetal head attraction Smooth output, previous fetal head suction device attract fetal head by the way of direct Negative Pressure Difference, and traction is cooperated to drive Childbirth fetus is helped, therefore particularly important to the control of pressure difference, pressure is too small, and attraction is weak, slippage is easy to appear, if pressure mistake Greatly or pressure is uneven, will lead to fetal head injury, and the larger control of traction and adjusting are also very crucial, angular deviation is easy to cause Attraction process gas leakage, currently used vacuum extractor include tubaeform vacuum extractor, cup-shaped aspirator, the suction of cattle horn shape fetal head Lead device, these structures in actual use, since angle is fixed, it is difficult to control is adjusted, drawing when it is possible that tire Packet, and the problems such as along with fetal head scalp blister, scratch, lacerated wound.

Publication number CN107049446A discloses vacuum extractor, and the wide end of the conically shaped including metal, conically shaped is equipped with More are fixed to the steel wire keel of arc, and the inboard on steel wire keel top is equipped with the silica-gel bead that connection is rolled with it, steel wire keel Outer side covering have a negative pressure cover, the top side of negative pressure cover is equipped with sealing edge, and the top side of sealing edge curves inwardly, negative pressure cover and sealing edge The pellosil being integrally formed, the narrow end of conically shaped are equipped with connecting cylinder, and connecting cylinder inner wall is equipped with the internal valve cavity of Non-return air valve, even Connect cylinder outer wall is equipped with the air exhaust nozzle for being evacuated and ventilating, and air exhaust nozzle is connected to internal valve cavity, and the device is using curved wire dragon Clamping is fixed in bone, and clamping convergent force is not adjustable, and attracts stability poor, and use spherical hinge structure, angular deflection control It is difficult.

A kind of novel gynecological vacuum extractor of publication number CN108478265A, including hinge casing, hinge casing Top and bottom is provided through expansion connecting rod loose slot, and the side of hinge casing is provided with handle connecting rod, outside hinge The side of shell is connected with expansion handle by handle connecting rod, and the front for expanding handle is provided with control button, hinge casing Front is provided through hinge, and handle connecting rod, which is connected by a hinge, expansion connecting rod, and the bottom for expanding connecting rod is provided with Support rod, the bottom for expanding connecting rod are connected with eyelid retractor by support rod, and the front of eyelid retractor is provided with charging slot, charging slot Be internally provided with charging column, the bottom of support rod is provided with movable axis fixing seat, the device using clamp structure carry out fetal head Attract, and traction angle is fixed, it is difficult to control be adjusted, and negative pressure is attracted to be formed by single pipeline, uniformity is poor, and holds Situations such as easily blocking.

Summary of the invention

In order to improve above situation, a kind of novel gynecological of the present invention provides one kind with telescopic vacuum extractor and passes through The dynamic flexible vacuum extractor of the exhibition crossed belt of multiple exhaust tubes is gathered, and forms pre- clamping to fetal head, cooperates and taken out in exhaust tube Gas forms uniformly distributed suction in fetal head position, and then forms the vacuum extractor that second level clamping absorption mode carries out stable holding.

A kind of novel gynecological of the present invention is achieved in that a kind of novel woman of the present invention produces with telescopic vacuum extractor Section with telescopic vacuum extractor by end fixing sleeve, connecting sleeve, the first connector sleeve, connecting rod, deflection arm, extension pipe, hold Hold handle, drive shell, the second connector sleeve, adjust buckle, air inlet duct, stop collar, aperture regulation plate, exhaust tube, fetal head attract cover, Outer fixed ring, communicating pipe, power switch, battery, vortex fan, the first tube body, the second tube body, articulated shaft, threaded rod, movement Plate and demarcation plate composition, drive shell and extension pipe one end socket-connect, and the drive shell is built-in with vortex fan, the driving Hull outside is equipped with gripping handle, described to hold being above equipped with battery, and is connected by power supply line with vortex fan, described to hold It holds the power switch for being above equipped with control vortex fan power on/off, second connector sleeve one end and the extension pipe other end socket-connect, even Extension bar one end and the second connector sleeve other end socket-connect, and second connector sleeve is built-in with demarcation plate, and are located at connecting rod and the Between two connector sleeve one end, threaded rod one end and it is hinged by articulated shaft and the connecting rod other end, deflection arm one end and screw thread Bar is connected, and described deflection arm one end is equipped with insertion nail, and in threaded rod, first connector sleeve one end and threaded rod are another Bolt is held, connecting sleeve and the first connector sleeve other end are connected, and the connecting sleeve diameter is greater than the first connector sleeve diameter, Communicating pipe one end and connecting sleeve socket-connect, end fixing sleeve is placed on the communicating pipe other end, on the end fixing sleeve etc. Distance is provided with multiple air inlet ducts, and stop collar is equipped on the end fixing sleeve inner wall, and the stop collar corresponds to the position of air inlet duct It disconnecting, outer Fixing shrink ring is placed on the fixing sleeve of end, and aperture regulation plate is placed in the fixing sleeve of end, and is located at stop collar side, Multiple engaging lugs are equidistantly equipped on the outside of the aperture regulation plate, and is pierced by out of multiple air inlet ducts is connected with outer fixed ring respectively It connects, the through hole for being provided with multiple through holes on the aperture regulation plate, and being distributed in a ring is one group, what multiple groups through hole was formed Ring is homocentric, and the through hole in one group is angularly distributed, and movable plate is placed in the fixing sleeve of end, and is located at the stop collar other side, institute It states and is provided with multiple aspirating holes on movable plate, the diameter of the aspirating hole is gradually reduced from import to outlet, multiple exhaust tube one end It is respectively placed on movable plate, and is connected with multiple aspirating holes one-to-one correspondence, multiple exhaust tube other ends run through from multiple respectively It is passed through in hole, then extends outward end fixing sleeve, guide sleeve, the guide sleeve are equipped between the exhaust tube and through hole Outside is placed on aperture regulation plate, and end fixing sleeve one end inner wall is inclined-plane, and fetal head attracts cover to be located at end fixing sleeve Side, and be connected with multiple exhaust tube other ends, the fetal head attracts cover is internal to be connected with exhaust tube, and the fetal head attracts Cover is hemispherical hollow structure, and first tube body one end is placed on the second connector sleeve, and is connected with the second connector sleeve, the second tube body One end is slidably disposed in the first tube body, and the other end is pierced by from the second tube body other end and is placed on the first connector sleeve, and described Two tube bodies and the first connector sleeve are connected, and adjusting buckle is equipped on first tube body, and the fetal head attracts cover by flexible material It is made, the fetal head, which attracts, is equipped with one layer of protective pad on cover inner sidewall.

Beneficial effect.

One, drift angle can be adjusted, is adjusted in conjunction with the physiological status of puerpera, operating efficiency is improved, slows down the pain of childbirth Sense.

Two, it drives movable plate mobile by pumping and drives in exhaust tube and receive, formed and attract gathering for cover, carry out fetal head Attract clamping in advance.

Three, multiple exhaust tube distributions are drawn, and suction is evenly distributed, and avoids the excessive formation tire packet of local suction.

Four, seperated splicing structure, use scope is wide, can be combined according to varying environment, adjusts installation, easy to carry It uses.

Five, deflection fetal head can be adjusted and attract cover, convenient for adjusting angle, enable direction of draw to be conditioned control, keep away Exempt from direction change when drawing, attracts and cover the tire packet to be formed that falls off.

Six, attracted by the clamping of second level, improve the stability that fetal head attracts cover, avoid single side in the prior art Tire packet situation caused by falling off during the attraction of formula.

Seven, multiple exhaust tubes, which extract, attracts, and avoids suction deficiency caused by existing aspirator bleed-off passage blocks, in turn Cover is attracted to fall off the phenomenon that fetal head position forms tire packet.

Detailed description of the invention

Fig. 1 is a kind of three-dimensional structure diagram of the telescopic vacuum extractor of novel gynecological of the present invention；

Fig. 2 is the stereo-resolution figure that a kind of novel gynecological of the present invention attracts cover with telescopic vacuum extractor fetal head；

Fig. 3 is the structural schematic diagram that a kind of novel gynecological of the present invention attracts cover with telescopic vacuum extractor fetal head；

Fig. 4 is a kind of structural schematic diagram of the telescopic vacuum extractor of novel gynecological of the present invention；

Fig. 5 is the three-dimensional structure diagram that a kind of novel gynecological of the present invention deflects interconnecting piece with telescopic vacuum extractor；

Fig. 6 is a kind of three-dimensional structure diagram of telescopic the first connector sleeve of vacuum extractor of novel gynecological of the present invention；

Fig. 7 is a kind of three-dimensional structure diagram of telescopic the second connector sleeve of vacuum extractor of novel gynecological of the present invention；

Fig. 8 is a kind of three-dimensional structure diagram of the telescopic vacuum extractor connecting rod of novel gynecological of the present invention；

Three-dimensional structure diagram when Fig. 9 is the telescopic vacuum extractor angular deflection of a kind of novel gynecological of the invention；

In attached drawing

Wherein are as follows: end fixing sleeve (1), connecting sleeve (2), the first connector sleeve (3), connecting rod (4), deflection arm (5), extension pipe (6), it holds (7), drive shell (8), the second connector sleeve (9), adjusts buckle (10), air inlet duct (11), stop collar (12) is opened It spends adjustable plate (13), exhaust tube (14), fetal head, which attracts, covers (15), outer fixed ring (16), communicating pipe (17), power switch (18), Battery (19), vortex fan (20), the first tube body (21), the second tube body (22), articulated shaft (23), threaded rod (24) are mobile Plate (25), demarcation plate (26).

Specific embodiment:

A kind of novel gynecological of the present invention is achieved in that a kind of novel gynecological of the present invention is used with telescopic vacuum extractor Telescopic vacuum extractor is by end fixing sleeve (1), connecting sleeve (2), the first connector sleeve (3), connecting rod (4), deflection arm (5), extension pipe (6), gripping are (7), drive shell (8), the second connector sleeve (9), adjusting buckle (10), air inlet duct (11), limit Position ring (12), aperture regulation plate (13), exhaust tube (14), fetal head attract cover (15), outer fixed ring (16), communicating pipe (17), electricity Source switch (18), battery (19), vortex fan (20), the first tube body (21), the second tube body (22), articulated shaft (23), screw thread Bar (24), movable plate (25) and demarcation plate (26) composition, drive shell (8) and extension pipe (6) one end socket-connect, the driving shell Body (8) is built-in with vortex fan (20), and gripping handle (7) is equipped on the outside of the drive shell (8), is equipped on the gripping handle (7) Battery (19), and be connected by power supply line with vortex fan (20), control vortex fan is equipped on the gripping handle (7) (20) power switch (18) of power on/off, the second connector sleeve (9) one end and extension pipe (6) other end socket-connect, connecting rod (4) one End and the second connector sleeve (9) other end socket-connect, and second connector sleeve (9) is built-in with demarcation plate (26), and are located at connecting rod (4) between the second connector sleeve (9) one end, threaded rod (24) one end and pass through articulated shaft (23) and connecting rod (4) other end phase Hingedly, deflection arm (5) one end is connected with threaded rod (24), and described deflection arm (5) one end is equipped with insertion nail, and is embedded at screw thread In bar (24), the first connector sleeve (3) one end and threaded rod (24) other end bolt, connecting sleeve (2) and the first connector sleeve (3) The other end is connected, and connecting sleeve (2) diameter is greater than the first connector sleeve (3) diameter, communicating pipe (17) one end and connection card Set (2) socket-connects, and end fixing sleeve (1) is placed on communicating pipe (17) other end, equidistant on the end fixing sleeve (1) to open Have multiple air inlet ducts (11), is equipped with stop collar (12) on end fixing sleeve (1) inner wall, the corresponding air inlet of the stop collar (12) The position of slot (11) disconnects, and outer fixed ring (16) is placed on end fixing sleeve (1), and aperture regulation plate (13) is placed in end and fixes It covers in (1), and is located at stop collar (12) side, multiple engaging lugs are equidistantly equipped on the outside of the aperture regulation plate (13), and respectively It is pierced by from multiple air inlet ducts (11) and is connected with outer fixed ring (16), be provided with multiple run through on the aperture regulation plate (13) Hole, and the through hole being distributed in a ring is one group, the ring that multiple groups through hole is formed is homocentric, and the through hole in one group angularly divides Cloth, movable plate (25) are placed in end fixing sleeve (1), and are located at stop collar (12) other side, are provided on the movable plate (25) The diameter of multiple aspirating holes, the aspirating hole is gradually reduced from import to outlet, and multiple exhaust tube (14) one end are respectively placed in shifting On movable plate (25), and it is connected with multiple aspirating holes one-to-one correspondence, multiple exhaust tube (14) other ends are respectively from multiple through holes It inside passes through, then extends outward end fixing sleeve (1), be equipped with guide sleeve between the exhaust tube (14) and through hole, it is described It is placed on aperture regulation plate (13) on the outside of guide sleeve, end fixing sleeve (1) one end inner wall is inclined-plane, and fetal head attracts cover (15) it is located at end fixing sleeve (1) side, and is connected with multiple exhaust tubes (14) other end, the fetal head attracts in cover (15) Portion is connected with exhaust tube (14), and it is hemispherical hollow structure that the fetal head, which attracts cover (15), and the first tube body (21) one end is placed in On second connector sleeve (9), and it is connected with the second connector sleeve (9), the second tube body (22) one end is slidably disposed at the first tube body (21) in, the other end is pierced by from the second tube body (22) other end and is placed on the first connector sleeve (3), second tube body (22) and the One connector sleeve (3) is connected, and adjusting buckle (10) is equipped on first tube body (21), and the fetal head attracts cover (15) by soft Material is made, and the fetal head, which attracts, is equipped with one layer of protective pad on cover (15) inner sidewall.

In use, it is equipped with distance between the movable plate (25) and communicating pipe (17) the other end face under original state, into It is equipped with connection gap between air drain (11) and communicating pipe (17), attracts cover (15) to cover in fetus head fetal head first, by holding It holds and (7) holds aspirator, press power switch (18), vortex fan (20) is powered to starting to work and is evacuated, into And fetal head is attracted by communicating pipe (17) and exhaust tube (14) and is evacuated in cover (15), while extraneous gas passes through air inlet duct (11) it fills into communicating pipe (17), movable plate (25) is mobile to communicating pipe (17) direction by gas suction when pumping, and drives Multiple exhaust tubes (14) are mobile to shrink, and movable plate (25) and communicating pipe (17) the other end face fit, and then air inlet duct (11) It is blocked, extraneous gas can only be evacuated by exhaust tube (14), and fetal head attracts cover (15) to shrink drive in exhaust tube (14) Under also shunk, and then tighten in fetus head, then proceed to keep pumping fetus is attracted, in distraction procedure In, it can according to need and angular deflection adjusting, deflection process are carried out to connecting rod (4) and threaded rod (24) by deflection arm (5) In the second tube body (22) slided along the first tube body (21), by adjusting buckle to the second tube body (22) and the first tube body (21) It is fixed, and then is attracted by cover (15) and is held for fetal head, angle between (7) is adjusted, easily facilitate operation；

The deflection arm (5) can form fixed angle between extension pipe (6), attract cover (15) for manually adjusting fetal head Deflection angle, so as to when fetal head attracts cover (15) to draw drawing, it can be ensured that the directionality of drawing, while can be in medical care people In member's traction process, the deflection for carrying out angle is adjusted, and is avoided fetal head attraction from covering (15) and fall off to cause to pull fetal head and is caused tire packet；

The design that the position of the stop collar (12) corresponding air inlet duct (11) disconnects, can be avoided and cause to hinder to air inlet duct (11) Gear avoids most starting to influence extraneous gas by air inlet duct (11) to communicating pipe (17) interior tonifying Qi in pumping；

The ring that multiple groups through hole is formed is homocentric, and the design that the through hole in one group is angularly distributed can make multiple exhaust tubes (14) it is uniformly distributed, and then is evacuated and is evenly distributed, it is more preferable to the attraction stability of fetal head；

The design that the diameter of the aspirating hole is gradually reduced from import to outlet, can be such that gas flow rate gradually increases in aspirating hole Add, the air-flow velocity of entrance location is enabled to be less than the flow velocity of outlet port, reduces extraction pair, it is excessive to fetal head suction force, Other injuries such as scuffing are caused to fetal head, protect fetal head；

End fixing sleeve (1) one end inner wall is the design on inclined-plane, can be carried out when multiple exhaust tubes (14) are unfolded to it Limit, the maximum opening of control exhaust tube (14) expansion avoid exhaust tube (14) expansion excessive, so that fetal head attracts cover (15) mistake Degree expansion, influences the patency of fetal head drawing, brings other concurrent problems；

The fetal head attracts cover (15) to be made of flexible material, preferably silica gel material, can be with movable plate (25), aperture tune Section plate (13), exhaust tube (14) are formed between end fixing sleeve (1) and are linked；

When pumping, extraneous gas is filled by end fixing sleeve (1), passage movable plate (25) recession, and then pulls exhaust tube (14) it is slided along dynamic aperture regulation plate (13), so that multiple exhaust tubes (14) are inwardly gathered, so that fetal head attracts cover (15) it shrinks, fetal head is clamped, positioning can be clamped in advance to fetal head, the clamping that cooperation exhaust tube (14) forms second level attracts Structure improves the protection attracted fetal head, further increases the stability for attracting traction process, avoiding to fall off causes Tire packet；

The fetal head attracts the design that one layer of protective pad is equipped on cover (15) inner sidewall, can cooperate and attract the interior receipts covered and tire Head contact forms protection point in contacting points position, avoids direct contact with and forms clamping impression in fetal head position, further to tire Youngster protects on head, avoids frictionally damage；

The design of the deflection arm (5) and threaded rod (24) coordination hinge axis (23) can draw cover angle to fetal head and adjust Section, and then adapt to multi-angle traction；

The multiple exhaust tube (14) cooperation fetal head attracts the design of cover (15), is evacuated compared to one-pipe, and gas distribution is more equal It is even, and then stability is more preferable, while avoiding when extracting, since the blocking of extracting channel influences the suction extracted, Jin Er It falls off in traction process, tire packet occurs, drawn by the dispersion of multichannel, enable suction equiblibrium mass distribution, improve single After exhaust tube (14) blocks, the stability that works on；

The deflection arm (5), the design that the first tube body (21) and the second tube body (22) are fixed by adjusting buckle, can be right Fetal head, which attracts cover (15) and holds, is fixed angle between (7), and deflection in distraction procedure is avoided to influence fetal head traction；

Combine the anti-blocking alternate configuration of multiple exhaust tubes (14), multiple exhaust tubes (14) uniformly pumping, pre- clamping and pumping second level It grips, adjust the deflection angle adaptation direction of draw multiple technologies means that fetal head attracts cover (15), improve fetal head attraction Stability when (15) obtain attraction process and drawing is covered, avoids falling off, causes tire packet, reach through the scalable of exhaust tube (14) The mobile contraction for realizing cephalotractor clamps the purpose drawn.

Claims (10)

1. the telescopic vacuum extractor of a kind of novel gynecological, it is characterized in that: being connected by end fixing sleeve, connecting sleeve, first Female connector, connecting rod, deflection arm, extension pipe, hold handle, drive shell, the second connector sleeve, adjusting buckle, air inlet duct, stop collar, Aperture regulation plate, exhaust tube, fetal head attract cover, outer fixed ring, communicating pipe, power switch, battery, vortex fan, the first pipe Body, the second tube body, articulated shaft, threaded rod, movable plate and demarcation plate composition, drive shell and extension pipe one end socket-connect, described Drive shell is built-in with vortex fan, is equipped with gripping handle on the outside of the drive shell, described to hold being above equipped with battery, and leads to It crosses power supply line to be connected with vortex fan, described hold connects the power switch for being above equipped with control vortex fan power on/off, second Female connector one end and the extension pipe other end socket-connect, and connecting rod one end and the second connector sleeve other end socket-connect, second connection Set is built-in with demarcation plate, and positioned at connecting rod and second connector sleeve one end between, threaded rod one end and passes through articulated shaft and connection The bar other end is hinged, and deflection arm one end is connected with threaded rod, and described deflection arm one end is equipped with insertion nail, and is embedded at screw thread In bar, first connector sleeve one end and threaded rod other end bolt, connecting sleeve and the first connector sleeve other end are connected, connection Pipe one end and connecting sleeve socket-connect, and end fixing sleeve is placed on the communicating pipe other end, equidistant on the end fixing sleeve Multiple air inlet ducts are provided with, stop collar is equipped on the end fixing sleeve inner wall, outer Fixing shrink ring is placed on the fixing sleeve of end, aperture Adjustable plate is placed in the fixing sleeve of end, and is located at stop collar side, is equidistantly equipped with multiple engaging lugs on the outside of the aperture regulation plate, And be pierced by out of multiple air inlet ducts be connected with outer fixed ring respectively, movable plate is placed in the fixing sleeve of end, and is located at stop collar The other side is provided with multiple aspirating holes on the movable plate, and multiple exhaust tube one end are respectively placed on movable plate, and with multiple pumpings Hole, which corresponds, to be connected, and multiple exhaust tube other ends are passed through out of multiple through holes respectively, and it is solid then to extend outward end Fixed set is equipped with guide sleeve, is placed on aperture regulation plate on the outside of the guide sleeve between the exhaust tube and through hole, fetal head is inhaled Draw cover and be located at end fixing sleeve side, and be connected with multiple exhaust tube other ends, the fetal head attracts cover internal and exhaust tube It is connected, it is hemispherical hollow structure that the fetal head, which attracts cover, and first tube body one end is placed on the second connector sleeve, and is connected with second Female connector is connected, and second tube body one end is slidably disposed in the first tube body, and the other end is pierced by from the second tube body other end and is placed in On first connector sleeve, second tube body and the first connector sleeve are connected, and adjusting buckle is equipped on first tube body.

2. a kind of telescopic vacuum extractor of novel gynecological according to claim 1, it is characterised in that the pumping When, extraneous gas is filled by end fixing sleeve, passage movable plate recession, and then pulls exhaust tube sliding along dynamic aperture regulation plate It is dynamic, so that multiple exhaust tubes are inwardly gathered, so that fetal head attracts cover to shrink, fetal head is clamped, it can be pre- to fetal head Positioning is clamped, cooperation exhaust tube forms the clamping Attraction structure of second level.

3. a kind of telescopic vacuum extractor of novel gynecological according to claim 1, it is characterised in that the deflection Arm can form fixed angle between extension pipe, attract the deflection angle of cover, for manually adjusting fetal head to inhale in fetal head When drawing cover absorption drawing, it can be ensured that the directionality of drawing, while the inclined of angle can be carried out in medical staff's traction process Modulation section.

4. a kind of telescopic vacuum extractor of novel gynecological according to claim 1, it is characterised in that the aperture The through hole for being provided with multiple through holes on adjustable plate, and being distributed in a ring is one group, and the ring that multiple groups through hole is formed is homocentric, one group Interior through hole is angularly distributed.

5. a kind of telescopic vacuum extractor of novel gynecological according to claim 1, it is characterised in that the end Fixing sleeve one end inner wall is inclined-plane, can be limited when multiple exhaust tubes are unfolded to it, the maximum of control exhaust tube expansion Aperture avoids exhaust tube expansion excessive, so that fetal head attracts cover excessively expansion.

6. a kind of telescopic vacuum extractor of novel gynecological according to claim 1, it is characterised in that the limit The position that ring corresponds to air inlet duct disconnects.

7. a kind of telescopic vacuum extractor of novel gynecological according to claim 1, it is characterised in that the pumping The diameter in hole is gradually reduced from import to outlet.

8. a kind of telescopic vacuum extractor of novel gynecological according to claim 1, it is characterised in that the connection Cutting ferrule diameter is greater than the first connector sleeve diameter.

9. a kind of telescopic vacuum extractor of novel gynecological according to claim 1, it is characterised in that the fetal head Attract and is equipped with one layer of protective pad on cover inner sidewall.

10. according to claim 1 or the telescopic vacuum extractor of a kind of novel gynecological described in 9, it is characterised in that described Fetal head attracts cover to be made of flexible material.