CN111265764B

CN111265764B - Suction-injection dual-purpose injection booster

Info

Publication number: CN111265764B
Application number: CN202010207454.1A
Authority: CN
Inventors: 张同合; 孙传祝; 孙乐乐
Original assignee: Zibo Kechuang Medical Instrument Co ltd
Current assignee: Zibo Kechuang Medical Instrument Co ltd
Priority date: 2020-03-23
Filing date: 2020-03-23
Publication date: 2024-05-28
Anticipated expiration: 2040-03-23
Also published as: CN111265764A

Abstract

The invention provides an injection booster for dual-purpose injection, which is characterized in that: a support plate and a sleeve are arranged in the gun body, and an arc groove is arranged above the gun body; a transmission pin is arranged in a U-shaped groove of the trigger, two ends of a trigger shaft are supported on the gun body, one end of a spring I is hung on a pin shaft I of the gun body, and the other end of the spring I is hung on a pin shaft II of the trigger; two ends of a connecting rod I are respectively hinged at the inner end of a transmission pin and one end of a rocker arm, a connecting rod II is respectively hinged at the other end of the rocker arm and the middle part of the rocker arm, and two ends of a connecting rod III are respectively hinged on the end part of the rocker arm and a pin shaft III of a boosting sleeve; the two ends of the chain piece are hinged to the middle part of the shifting fork and the outer end of the transmission pin, a pin shaft III of the boosting sleeve is positioned in a U-shaped groove of the shifting fork, and two ends of a boosting rod sleeved with 2 clamping sleeves and the boosting sleeve are supported on the supporting plate; the injection tube is arranged in the arc groove of the gun body, one end of the plunger rod provided with the plunger is inserted into the injection tube, and the other end of the plunger rod is connected with the end part of the boosting rod. The invention has simple operation, and the quantity of the injected and inhaled liquid is easy to be accurately controlled.

Description

Suction-injection dual-purpose injection booster

Technical Field

The invention provides an injection booster for dual-purpose injection, which belongs to the field of medical appliances and equipment, and is mainly used for boosting and pressurizing when injecting liquid into a patient, and also can be used for dispensing before transfusion and the like.

Background

When the puerpera is in production, in order to shorten the labor and reduce the pain of the puerpera, the disposable cervical dilatation balloon is generally placed in the uterus and vagina of the puerpera, and then liquid is slowly injected into the disposable cervical dilatation balloon through the infusion tube to gradually expand the disposable cervical dilatation balloon, so that the effect of dilating the cervical orifice and vagina is achieved, and the smooth output of a fetus is facilitated.

At present, most of the commonly used injection boosting devices are plunger type injectors, injection input of liquid is finished by manual pushing of nurses, labor intensity is high, and the quantity of the input liquid is not easy to accurately control. When the quantity of the input liquid is too large, the puerpera is more painful, otherwise, the cervical orifice and the vagina can not be dilated. Therefore, the Zibo scientific invasive medical instrument limited company invents an absorbing and injecting dual-purpose injection booster (application number: 202010080463.9) which can well complete the injection work of liquid. However, the force-reducing operation system of the booster is realized by pulling the trigger and then transmitting parts such as a chain sheet, a shifting fork and the like, and can only be used for injecting liquid. Therefore, the invention also discloses a self-priming injection booster (application number: 202010174806.8) which can well finish the sucking and injecting work of liquid, but the gun body of the invention consists of two handles, so that the operation is inconvenient, the appearance is not attractive and the gun body is inconvenient to carry.

In view of the current situation of the medical instrument industry, there is an urgent need for a dual-purpose injection booster which is time-saving and labor-saving in operation, easy to control the amount of liquid to be sucked and injected, convenient to operate and attractive in appearance.

Disclosure of Invention

The invention aims to provide the suction-injection dual-purpose injection booster which can overcome the problems of the prior art and equipment, is time-saving and labor-saving in operation, is easy to accurately control the quantity of injected and sucked liquid, is convenient to operate and has attractive appearance.

The technical proposal is as follows: the syringe comprises a syringe, a plunger and a plunger rod, wherein the syringe is in a transparent state, one end of the syringe is closed, shoulder shoulders are arranged on the outer circles of two ends of the syringe, and 0-line scale marks positioned at the closed end are arranged on two sides of the outer cylindrical surface of the syringe along the length direction of the syringe; the closed end of the injection tube extends outwards to form a section of conical tube, the conical tube is positioned on the symmetrical surface of the scale marks on two sides, the outer diameter of one end of the conical tube, which is close to the injection tube, is large, the outer diameter of one end of the conical tube, which is far away from the injection tube, is small, and the axis of the conical tube is parallel to the axis of the injection tube; the outer diameter of the plunger is larger than the inner diameter of the injection tube, the difference value between the outer diameter of the plunger and the inner diameter of the injection tube is equal to 0.2mm-0.5mm, one end of the plunger rod is provided with the plunger, and one end provided with the plunger is inserted into the injection tube from the opening end of the injection tube; the boosting gun comprises a gun body, a boosting mechanism and a conversion device, wherein the inner cavity of the gun body is in a hollow thin shell shape and a pistol shape, the gun body comprises a gun shell I, a gun shell II, a supporting plate and a sleeve, which are bilaterally symmetrical, and the whole gun body formed by the gun shell I and the gun shell II is divided into a gun body in the middle, a gun barrel in the front, a tail part far from the rear upper part of the gun barrel and a gun handle positioned below; a supporting plate I is arranged in the inner cavity of the joint of the gun barrel and the gun body, a supporting plate II is arranged in the inner cavity of the joint of the tail and the gun body, round holes are formed in the supporting plate I and the supporting plate II, and the axes of the 2 round holes are coaxial; a sleeve I is arranged between the support plate I and the foremost end of the inner cavity of the gun barrel, a sleeve II is arranged between the support plate II and the rearmost end of the inner cavity of the tail part, and the axes of the sleeve I and the sleeve II are coaxial with the common axis of the round holes on the support plate I and the support plate II; the outermost ends of the gun shell I and the gun shell II tail are provided with round holes, the centers of the round holes are positioned on the axis of the sleeve II, the diameter of the round holes is equal to the inner diameter of the sleeve II, 1 pin shaft I extends out of the inner surfaces of the gun body parts of the gun shell I and the gun shell II respectively, and the axes of 2 pin shafts I are coaxial; the middle part above the gun body is provided with an arc groove smaller than a semicircle, the radius of the arc groove is equal to half of the outer diameter of the injection tube, the length of the arc groove is smaller than the total length from the front end of the gun barrel to the tail part of the gun shell, and the axis of the arc groove is parallel to the common axis of the sleeve I and the sleeve II; the two ends of the injection tube are arranged in the circular arc groove above the gun body through the clamp, and one end of the injection tube extending out of the conical tube faces the direction of the gun tube away from one end of the gun body; the gun body of the gun shell I and the gun body of the gun shell II are respectively extended out of 1 cylindrical boss inwards from the inner surface of one side of the gun barrel, and the axes of the 2 bosses are coaxial; the outer surfaces of the gun shell I and the gun shell II, which correspond to the boss of the inner surface, are provided with round holes, the round holes are blind holes, the axes of the 2 blind holes are coaxial, and the axes of the blind holes are coaxial with the boss axis; a through round hole is formed between the inner end face of the boss on the inner surface of the gun shell I and the outer surface of the gun shell I, a through round hole is also formed between the inner end face of the boss on the inner surface of the gun shell II and the outer surface of the gun shell II, the axes of the 2 through round holes are coaxial, the axes of the through round holes are coaxial with the axes of the boss, and the diameter of the through round holes is smaller than that of the coaxial blind holes; the inner surface of the gun shell I is positioned between the boss and the support plate I, another 1 boss is arranged, a blind hole is also arranged on the outer surface of the gun shell I corresponding to the boss of the inner surface, and the axis of the blind hole is coaxial with the axis of the boss; a through round hole is arranged between the inner end surface of the boss on the inner surface of the gun shell I and the outer surface of the gun shell I, the axis of the through round hole is coaxial with the axis of the boss, and the diameter of the through round hole is smaller than the diameter of the coaxial blind hole; the boosting mechanism is divided into 2 transmission routes of a route I and a route II, wherein the route I comprises a trigger, a trigger shaft, a transmission pin, a spring I, a clamping sleeve, a boosting rod, a shifting fork and a chain piece, the trigger is diamond-shaped, and two side surfaces of the extended long water chestnut perpendicular to the plane direction of the diamond are respectively concave arc-shaped and convex arc-shaped; a U-shaped groove is arranged at the position of the diagonal corner of the longer water chestnut, where the trigger extends out, and the symmetrical surfaces of the 2U-shaped side surfaces of the U-shaped groove are overlapped with the symmetrical surfaces of the diamond-shaped plane of the trigger in the direction perpendicular to the diamond-shaped plane; the middle part of the trigger is provided with a round hole with the axis perpendicular to the plane of the diamond, 1 round hole is respectively arranged at the diamond corner extending out of the opposite angle of the longer diamond, namely, 2U-shaped side surfaces of the U-shaped groove, 2 round hole axes on the 2U-shaped side surfaces are coaxial, and the 2 round hole axes are perpendicular to the symmetrical surfaces of the 2U-shaped side surfaces of the U-shaped groove, namely, the axes are parallel to the round hole axes of the middle part of the trigger; one end, close to the longer water chestnut, of the middle part of the trigger extends out of the two sides of the convex cambered surface of the longer water chestnut along the direction perpendicular to the diamond plane, of each pin shaft II, the 2 pin shafts II are coaxial, and the axis of each pin shaft II is parallel to the axis of a round hole in the middle part of the trigger; the trigger is arranged in the middle of the trigger shaft 1 through a round hole in the middle, 1 transmission pin is respectively arranged in the round holes on the 2U-shaped side surfaces of the trigger, two ends of the trigger shaft are respectively supported at the gun bodies of the gun shell I and the gun shell II and close to the gun barrel, and when one end of the trigger extending out of the longer water chestnut faces towards the gun handle, the concave cambered surface of the trigger extending out of the longer water chestnut faces towards one side of the gun barrel; the spring I is a torsion spring and is provided with 1 piece of spring wire which is symmetrical in a left-handed and right-handed way, the spring wires at two ends of the 2 pieces of springs I extend out of 1 section of straight line section along the radial direction of the spring I, the tail ends of the straight line section are respectively provided with a winding lug, the winding lugs at one end of each 1 piece of springs I which is symmetrical in the left-handed and right-handed way are respectively sleeved and hung on a pin roll I arranged on the inner surfaces of the gun shell I and the gun shell II, and the winding lugs at the other end are respectively sleeved and hung on a pin roll II arranged on the two side surfaces of the trigger; the outer circle of one end of the clamping sleeve in a cylindrical pipe shape is provided with a shoulder, the other end of the clamping sleeve is provided with an outer conical pipe section, the large end of the outer conical pipe section is far away from the cylindrical pipe section of the clamping sleeve, the diameter of the small end of the outer conical pipe section is equal to the outer diameter of the cylindrical pipe section of the clamping sleeve, the clamping sleeve is uniformly cut with a plurality of grooves along the circumferential direction of the clamping sleeve, the clamping sleeve is in a circular pipe shape, two sides of the middle part of the outer circle of the boosting sleeve with the inner diameter equal to the outer diameter of the cylindrical pipe section of the clamping sleeve symmetrically extend outwards to form 1 pin shaft III, and 2 pin shafts III are coaxial; the auxiliary push rod is inserted into the sleeve II from the tail of the gun body, 2 clamping sleeves are sleeved at the extending end of the auxiliary push rod, which passes through the support plate II, one end, which is close to the support plate II, of the clamping sleeve, which is cut with a groove, faces to one side of the gun barrel, and the other end, which is close to the support plate I, of the clamping sleeve, which is cut with a groove, faces to one side of the gun barrel; the outer circles of the 2 clamping sleeves are sleeved with boosting sleeves, the boosting rods penetrate through the 2 clamping sleeves and the extended ends of the boosting sleeves to be inserted into the sleeve I, and the other ends of the boosting rods, which are far away from the sleeve I, are connected with the extended ends of the plunger rods, which are inserted into the injection tube, through transmission plates; one end of a shifting fork in a rectangular flat plate shape is provided with a U-shaped groove, the symmetrical surface of the U-shaped groove coincides with the symmetrical surface of the rectangular plate surface of the shifting fork in the width direction, the other end and the middle part of the shifting fork are provided with round holes, 2 round hole axes are positioned on the symmetrical surface of the rectangular plate surface of the shifting fork in the width direction, 2 shifting forks are respectively fixed at two ends of a shifting fork shaft through round holes at one end, the round hole axes at the middle part of the 2 shifting forks are coaxial, and the symmetrical surfaces of the U-shaped grooves at one end of the 2 shifting forks coincide; the assembly formed by assembling the shifting fork and the shifting fork shaft is respectively supported at the positions, close to the tail, of the gun bodies of the gun shells I and II of the gun body through the extending ends of the shifting fork shaft after penetrating through the shifting fork, and 2 pin shafts III extending out of the outer circle of the boosting sleeve, close to the supporting plate II, are respectively positioned in U-shaped grooves of the 2 shifting forks; one end of each 2 pieces of chain pieces is respectively hinged in a round hole in the middle of each 2 pieces of shifting forks, the other end of each 2 pieces of chain pieces is respectively hinged at the end parts of each 2 pieces of transmission pins arranged on the trigger and slide out of the two side surfaces of the U-shaped groove; the route II of the boosting mechanism comprises a trigger, a trigger shaft, a transmission pin, a spring I, a clamping sleeve, a boosting rod, a rocker arm, a rocker and a connecting rod, wherein round holes are formed in the two ends and the middle of the rocker arm, the axes of 3 holes are parallel, 2 rocker arms are respectively fixed at the two ends of the rocker arm shaft through the round holes in the middle, and the axes of the round holes at the two ends of the 2 rocker arms are respectively coaxial; the assembly body formed by assembling the rocker arm and the rocker arm shaft is respectively supported at the middle parts of the gun bodies of the gun shell I and the gun shell II of the gun body through the extending ends of the rocker arm shaft after penetrating through the rocker arm; one end of the 2 connecting rods I are respectively hinged in round holes at one end of the 2 rocker arms, the other end of the 2 connecting rods I is respectively hinged at the end parts of two sides of the U-shaped groove, where the two transmission pins arranged on the trigger slide; round holes are formed in the two ends and the middle of each rocker, the axes of the 3 holes are parallel, 2 rockers are respectively fixed at the two ends of the rocker shaft through round holes at one end, and the axes of the round holes at the middle of the 2 rockers and the round holes at the other end are coaxial respectively; the assembled body of the rocker and the rocker shaft is respectively supported at the positions of the gun bodies, close to the gun handles, of the gun shells I and II of the gun body through the extending ends of the rocker shaft after penetrating through the rocker shaft at the two ends; one end of the 2 connecting rods II is respectively hinged in the round holes in the middle parts of the 2 rocking rods, and the other end of the 2 rocking rods are respectively hinged in the round holes in the other ends of the 2 rocking arms far away from the connecting rods I; one end of the 2 connecting rods III is respectively hinged in a round hole at the other end of the 2 rocking bars far away from the rocking bar shaft, and the other ends of the 2 connecting rods III are respectively sleeved and hung on 2 pin shafts III extending from the outer circle of the boosting sleeve near the supporting plate I; the conversion device comprises a button, a push rod, a limit cover, a bracket shaft, a locking plate, a short rocker arm shaft and a pull rod, wherein the button comprises a liquid suction button and an injection button, the center of the 2 buttons with the same structural shape and size is in a disc shape, a boss extends out of one end of the button, a blind hole is formed in the other end far away from the boss, and the axis of the blind hole is coaxial with the axis of the boss; the push rod comprises a liquid suction push rod and an injection push rod, the liquid suction push rod is cylindrical, and one end of the injection push rod which is cylindrical is provided with a semispherical head; one end of the liquid suction push rod is arranged in the blind hole of the liquid suction button, and one end of the injection push rod, which is not provided with the semispherical head, is arranged in the blind hole of the injection button; the center of the limit cover in a disc shape extends out of the 1 boss towards one end, a blind hole is formed in the other end far away from the boss, a round hole which is communicated with the outer surface of the boss extending out of the other end of the limit cover is formed in the bottom of the blind hole, and the axis of the blind hole and the axis of the through round hole are coaxial with the axis of the boss; the spring II is a spiral cylindrical compression spring, 2 springs II are respectively arranged in round holes which are arranged on the outer surface of the gun shell I and the gun shell II and correspond to the boss on the inner surface, and the liquid suction push rod of the 2 liquid suction button and liquid suction push rod combination body respectively passes through the 2 springs II and then respectively passes through round holes which are arranged between the inner end surface of the boss on the inner surface and the outer surface of the gun shell I and the gun shell II and are communicated with each other, and then is inserted into the gun body; the 2 limiting covers are respectively arranged on the outer surfaces of the gun shell I and the gun shell II after compressing the spring II through the disc end surfaces of the liquid suction buttons, boss parts of the limiting covers face outwards, and boss parts of the 2 liquid suction buttons extend outwards after penetrating through round holes formed between the bottoms of blind holes of the limiting covers and the outer surfaces of the bosses; the other 1 spring II is arranged in a round hole which is arranged on the outer surface near the supporting plate I and corresponds to the boss on the inner surface of the gun shell I, and after the hemispherical head end of the injection push rod of the 1 injection button and injection push rod combination passes through the spring II, the hemispherical head end passes through a round hole which is arranged on the inner surface near the boss on the supporting plate I and runs through between the inner end surface and the outer surface of the boss on the inner surface of the gun shell I and then is inserted into the gun body; the other 1 piece of limit cover is arranged on the outer surface of the gun shell I after compressing the spring II through the disc end face of the injection button, the boss part of the limit cover faces outwards, and the boss part of the injection button extends outwards after passing through a round hole which is arranged between the bottom of the blind hole of the limit cover and the outer surface of the boss; the bracket is J-shaped, round holes are formed in the two ends and the middle of the bracket, the axes of the 3 round holes are perpendicular to the J-shaped plane of the bracket, the bracket is arranged in the middle of a bracket shaft through a round hole at one end, the two ends of the bracket shaft are respectively supported on one sides of a gun body, close to a gun barrel, of a gun shell I5 and a gun shell II, and a supporting point of the bracket shaft on the gun shell I is positioned between 2 bosses on the gun shell I; the other end of the bracket faces away from the gun barrel, and the axis of the round hole at the other end of the bracket is coaxial with the axes of the 2 bosses on the gun shell I and the gun shell II; the spring III is a spiral cylindrical compression spring, the outer circle of the pressure head is in a stepped shape with two sections of large and small diameters, the two ends of the pressure head are respectively provided with a pressure head, the large end of the pressure head is positioned in the spring III, the small end faces outwards, the large and small diameter joint faces of the pressure head are respectively parallel and level with the outer end faces of the pressing rings at the two ends of the spring III, and a combination of 1 spring III and 2 pressure heads is arranged on a bracket and is coaxial with the axes of 2 bosses on the gun shell I and the gun shell II; the locking plate is in a mouse shape, the cross section of the locking plate is in a U-shaped groove shape, the U-shaped opening faces towards the abdomen of the mouse, 1 round hole is respectively arranged below the front part of the locking plate, namely, on the two side walls of the U-shaped groove, and the axes of the 2 round holes are coaxial and perpendicular to the longitudinal symmetry plane of the mouse of the locking plate; the distance between the axes of the 2 semicircular grooves and the axes of the 2 round holes below the front part of the locking plate is equal to the distance between the axes of the round holes at one end of the bracket far away from the bracket shaft and the axes of the round holes in the middle of the bracket; the upper part of the front part of the locking plate upwards extends out of the 1 boss towards the direction away from the front circular hole, and the end part of the boss is provided with a circular hole with the axis perpendicular to the longitudinal symmetrical surface of the locking plate; the 2 round holes below the front part of the locking plate are hinged in the round hole in the middle of the bracket through a pin shaft IV, the bottom surface of the U-shaped groove of the locking plate is positioned above the bracket, the 2 round holes below the front part of the locking plate are respectively positioned at two sides of the bracket, and the 2 semicircular grooves below the rear part of the locking plate face the gun handle direction of the gun body; the short rocker arm shaft is supported on the plate surface of the support plate I towards the side of the support plate II through lugs, the short rocker arm shaft is positioned in the inner cavity of the gun shell I, and the axis of the short rocker arm shaft is parallel to the joint surface of the gun shell I and the gun shell II and parallel to the plate surface of the support plate I; the short rocker arm comprises a short rocker arm I and a short rocker arm II, one end of the short rocker arm I is fixed at the end part of the short rocker arm shaft extending out of the lug, and one end of the short rocker arm I, which is far away from the short rocker arm shaft, is horizontally directed to the gun shell II; one end of the short rocker arm II is fixed at the end part of the short rocker arm shaft extending out of the lower part of the lug, and one end of the short rocker arm II, which is far away from the short rocker arm shaft, is horizontally directed to the tail part of the gun body; one end of the pull rod is hinged to the end part of the short rocker arm I, which is far away from the short rocker arm shaft, and the other end of the pull rod is hinged to the round hole of the boss end part extending upwards above the front part of the locking plate.

On the basis of the prior art, the injection tube is in a transparent state, one end of the injection tube is closed, shoulder shoulders are arranged on the outer circles of the two ends of the injection tube, and scale marks with 0 line positioned at the closed end are arranged on the two sides of the outer cylindrical surface of the injection tube along the length direction of the injection tube; the closed end of the injection tube extends outwards to form a section of conical tube, the conical tube is positioned on the symmetrical surface of the scale marks on two sides, the outer diameter of one end of the conical tube, which is close to the injection tube, is large, the outer diameter of one end of the conical tube, which is far away from the injection tube, is small, and the axis of the conical tube is parallel to the axis of the injection tube; the outer diameter of the plunger is larger than the inner diameter of the injection tube, the difference value between the outer diameter of the plunger and the inner diameter of the injection tube is equal to 0.2mm-0.5mm, one end of the plunger rod is provided with the plunger, and one end provided with the plunger is inserted into the injection tube from the opening end of the injection tube. The inner cavity of the gun body of the boosting gun is in a hollow thin shell shape and a pistol shape, a supporting plate I is arranged in the inner cavity of the joint part of the gun barrel and the gun body of the gun body, a supporting plate II is arranged in the inner cavity of the joint part of the tail part and the gun body, round holes are formed in the supporting plate I and the supporting plate II, and the axes of the 2 round holes are coaxial; a sleeve I is arranged between the support plate I and the foremost end of the inner cavity of the gun barrel, a sleeve II is arranged between the support plate II and the rearmost end of the inner cavity of the tail part, and the axes of the sleeve I and the sleeve II are coaxial with the common axis of the round holes on the support plate I and the support plate II; the outermost ends of the gun shell I and the gun shell II tail are provided with round holes, the centers of the round holes are positioned on the axis of the sleeve II, the diameter of the round holes is equal to the inner diameter of the sleeve II, 1 pin shaft I extends out of the inner surfaces of the gun body parts of the gun shell I and the gun shell II respectively, and the axes of 2 pin shafts I are coaxial; the middle part above the gun body is provided with an arc groove smaller than a semicircle, the radius of the arc groove is equal to half of the outer diameter of the injection tube, the length of the arc groove is smaller than the total length from the front end of the gun barrel to the tail part of the gun shell, and the axis of the arc groove is parallel to the common axis of the sleeve I and the sleeve II. The two ends of the injection tube are arranged in the circular arc groove above the gun body through the clamp, and one end of the injection tube extending out of the conical tube faces the direction of the gun tube away from one end of the gun body. The gun body of the gun shell I and the gun body of the gun shell II are respectively extended out of 1 cylindrical boss inwards from the inner surface of one side of the gun barrel, and the axes of the 2 bosses are coaxial; the outer surfaces of the gun shell I and the gun shell II, which correspond to the boss of the inner surface, are provided with round holes, the round holes are blind holes, the axes of the 2 blind holes are coaxial, and the axes of the blind holes are coaxial with the boss axis; a through round hole is formed between the inner end face of the boss on the inner surface of the gun shell I and the outer surface of the gun shell I, a through round hole is also formed between the inner end face of the boss on the inner surface of the gun shell II and the outer surface of the gun shell II, 2 through round hole axes are coaxial, the through round hole axes are coaxial with the boss axes, and the through round hole diameter is smaller than the coaxial blind hole diameter. The inner surface of the gun shell I is positioned between the boss and the support plate I, another 1 boss is arranged, a blind hole is also arranged on the outer surface of the gun shell I corresponding to the boss of the inner surface, and the axis of the blind hole is coaxial with the axis of the boss; a through round hole is arranged between the boss inner end face of the inner surface of the gun shell I and the outer surface of the gun shell I, the axis of the through round hole is coaxial with the axis of the boss, and the diameter of the through round hole is smaller than the diameter of the coaxial blind hole. The boosting mechanism is divided into 2 transmission routes of a route I and a route II, wherein in the route I: the trigger is diamond-shaped, and two side surfaces of the extended water chestnut with a longer length perpendicular to the plane direction of the diamond are respectively concave arc-shaped and convex arc-shaped; a U-shaped groove is arranged at the position of the diagonal corner of the longer water chestnut, where the trigger extends out, and the symmetrical surfaces of the 2U-shaped side surfaces of the U-shaped groove are overlapped with the symmetrical surfaces of the diamond-shaped plane of the trigger in the direction perpendicular to the diamond-shaped plane; the middle part of the trigger is provided with a round hole with the axis perpendicular to the plane of the diamond, 1 round hole is respectively arranged at the diamond corner extending out of the opposite angle of the longer diamond, namely, 2U-shaped side surfaces of the U-shaped groove, 2 round hole axes on the 2U-shaped side surfaces are coaxial, and the 2 round hole axes are perpendicular to the symmetrical surfaces of the 2U-shaped side surfaces of the U-shaped groove, namely, the axes are parallel to the round hole axes of the middle part of the trigger; one end, close to the longer water chestnut, of the middle part of the trigger extends out of the two sides of the convex cambered surface of the longer water chestnut along the direction perpendicular to the diamond plane, of each pin shaft II, the 2 pin shafts II are coaxial, and the axis of each pin shaft II is parallel to the axis of a round hole in the middle part of the trigger; the trigger passes through the round hole at middle part and installs at trigger axle 1 middle part, and 1 driving pin is equipped with respectively in the round hole on 2U-shaped sides of trigger, and trigger axle both ends are supported respectively in rifle body of rifle shell I and rifle shell II and are close to barrel department, and when the one end that the trigger stretches out longer water chestnut towards the stock, the concave cambered surface that the trigger stretches out longer water chestnut towards barrel one side. The spring I is provided with 1 piece respectively of bilateral symmetry, the spring wire at the two ends of 2 pieces of springs I radially outwards stretches out 1 section of straightway along the spring I, and the tail ends of the straightway are all provided with winding lugs, the winding lugs at one end of each 1 piece of springs I of bilateral symmetry are respectively sleeved and hung on a pin shaft I arranged on the inner surfaces of a gun shell I and a gun shell II, and the winding lugs at the other end are respectively sleeved and hung on a pin shaft II arranged on the two sides of a trigger. The centre gripping cover is the cylinder tubulose, and the one end excircle of centre gripping cover is equipped with the convex shoulder, and the other end is equipped with outer cone pipe section, and the cylinder pipe section of centre gripping cover is kept away from to outer cone pipe section's the big end, and the tip diameter of outer cone pipe section equals the external diameter of centre gripping cover cylinder pipe section, and the centre gripping has a plurality of grooves along the circumferencial direction of centre gripping cover evenly cut, and the boosting cover is the pipe form, and boosting cover internal diameter equals the cylinder pipe section external diameter of centre gripping cover, and the excircle middle part bilateral symmetry of boosting cover outwards stretches out 1 round pin axle III respectively, and 2 round pin axle III are coaxial. The auxiliary push rod is inserted into the sleeve II from the tail of the gun body, 2 clamping sleeves are sleeved at the extending end of the auxiliary push rod, which passes through the support plate II, one end, which is close to the support plate II, of the clamping sleeve, which is cut with a groove, faces to one side of the gun barrel, and the other end, which is close to the support plate I, of the clamping sleeve, which is cut with a groove, faces to one side of the gun barrel; the outer circles of the 2 clamping sleeves are sleeved with boosting sleeves, and the boosting rods penetrate through the 2 clamping sleeves and the extended ends of the boosting sleeves and are inserted into the sleeve I; the other end of the push rod far away from the sleeve I is connected with the extending end of the plunger rod 3 inserted into the injection tube through a transmission plate. One end of a shifting fork in a rectangular flat plate shape is provided with a U-shaped groove, the symmetrical surface of the U-shaped groove coincides with the symmetrical surface of the rectangular plate surface of the shifting fork in the width direction, the other end and the middle part of the shifting fork are provided with round holes, 2 round hole axes are positioned on the symmetrical surface of the rectangular plate surface of the shifting fork in the width direction, 2 shifting forks are respectively fixed at two ends of a shifting fork shaft through round holes at one end, the round hole axes at the middle part of the 2 shifting forks are coaxial, and the symmetrical surfaces of the U-shaped grooves at one end of the 2 shifting forks coincide; the assembly formed by assembling the shifting fork and the shifting fork shaft is respectively supported at the positions, close to the tail, of the gun bodies of the gun shells I and II of the gun body through the extending ends of the shifting fork shaft after penetrating through the shifting fork, and 2 pin shafts III extending out of the outer circle of the boosting sleeve, close to the supporting plate II, are respectively positioned in U-shaped grooves of the 2 shifting forks; one end of the 2 pieces of chain pieces are respectively hinged in round holes in the middle parts of the 2 pieces of shifting forks, and when a transmission pin arranged on a trigger slides out of two side surfaces of the U-shaped groove, the other end of the 2 pieces of chain pieces are respectively hinged at the outer end parts of the 2 pieces of transmission pins. In route II: round holes are formed in the two ends and the middle of the rocker arm, the axes of the 3 holes are parallel, 2 rocker arms are respectively fixed at the two ends of the rocker arm shaft through the round holes in the middle, and the axes of the round holes at the two ends of the 2 rocker arms are respectively coaxial; the assembly formed by assembling the 2 rocker arms and the 1 rocker arm shaft is respectively supported in the middle of the gun body of the gun shell I and the gun shell II of the gun body through the extending ends of the two ends of the rocker arm shaft, which penetrate through the rocker arms; one end of the 2 connecting rods I are respectively hinged in round holes at one end of the 2 rocker arms, and when a transmission pin arranged on the trigger slides into two side surfaces of the U-shaped groove, the other ends of the 2 connecting rods I are respectively hinged at the inner end parts of the 2 transmission pins. Round holes are formed in the two ends and the middle of each rocker, the axes of the 3 holes are parallel, 2 rockers are respectively fixed at the two ends of the rocker shaft through round holes at one end, and the axes of the round holes at the middle of the 2 rockers and the round holes at the other end are coaxial respectively; the assembly formed by assembling the 2 rockers and the 1 rocker shaft is respectively supported at the positions, close to the gun handles, of gun bodies of a gun shell I and a gun shell II of the gun body through the extending ends of the rocker shafts after penetrating through the rockers; one end of the 2 connecting rods II is respectively hinged in the round holes in the middle parts of the 2 rocking rods, and the other end of the 2 rocking rods are respectively hinged in the round holes in the other ends of the 2 rocking arms far away from the connecting rods I; one end of the 2 connecting rods III is respectively hinged in a round hole at the other end of the 2 rocking bars far away from the rocking bar shaft, and the other ends of the 2 connecting rods III are respectively sleeved and hung on 2 pin shafts III extending from the outer circle of the boosting sleeve near the supporting plate I. The button of the conversion device comprises a liquid suction button and an injection button, the structural shapes and the sizes of the liquid suction button and the injection button are the same, the center of the 2 buttons in the shape of a disc extends out of the 1 boss towards one end, a blind hole is arranged at the other end far away from the boss, and the axis of the blind hole is coaxial with the axis of the boss; the push rod comprises a liquid suction push rod and an injection push rod, the liquid suction push rod is cylindrical, and the injection push rod is cylindrical, but one end of the injection push rod is provided with a semispherical head; one end of the liquid suction push rod is arranged in the blind hole of the liquid suction button, and one end of the injection push rod, which is not provided with the semispherical head, is arranged in the blind hole of the injection button; the center of the limit cover in the shape of a disc stretches out of the 1 boss towards one end, the other end far away from the boss is provided with a blind hole, the bottom of the blind hole is provided with a round hole communicated with the outer surface of the boss stretching out of the other end of the limit cover, and the axis of the blind hole and the axis of the communicated round hole are coaxial with the axis of the boss. The spring II is a spiral cylindrical compression spring, 2 springs II are respectively arranged in round holes which are arranged on the outer surface of the gun shell I and the gun shell II and correspond to the boss on the inner surface, and the liquid suction push rod of the 2 liquid suction button and liquid suction push rod combination body respectively passes through the 2 springs II and then respectively passes through round holes which are arranged between the inner end surface of the boss on the inner surface and the outer surface of the gun shell I and the gun shell II and are communicated with each other, and then is inserted into the gun body; the 2 limiting covers are respectively arranged on the outer surfaces of the gun shell I and the gun shell II after compressing the spring II through the disc end faces of the liquid suction buttons, boss parts of the 2 limiting covers face outwards, and the boss parts of the 2 liquid suction buttons penetrate through round holes formed between the bottoms of blind holes of the limiting covers and the outer surfaces of the bosses and then extend outwards. The other 1 spring II is arranged in a round hole which is arranged on the outer surface near the supporting plate I and corresponds to the boss on the inner surface of the gun shell I, and after the hemispherical head end of the injection push rod of the 1 injection button and injection push rod combination passes through the spring II, the hemispherical head end passes through a round hole which is arranged on the inner surface near the boss on the supporting plate I and runs through between the inner end surface and the outer surface of the boss on the inner surface of the gun shell I and then is inserted into the gun body; in addition, the 1 piece of limiting cover is arranged on the outer surface of the gun shell I after compressing the spring II through the disc end face of the injection button, the boss part of the limiting cover faces outwards, and the boss part of the injection button 1 extends outwards after penetrating through a round hole formed between the bottom of a blind hole of the limiting cover and the outer surface of the boss. The bracket is J-shaped, round holes are formed in the two ends and the middle of the bracket, the axes of the 3 round holes are perpendicular to the J-shaped plane of the bracket, the bracket is arranged in the middle of a bracket shaft through a round hole at one end, the two ends of the bracket shaft are respectively supported on one sides of a gun body, close to a gun barrel, of a gun shell I and a gun shell II, and a supporting point of the bracket shaft on the gun shell I is positioned between 2 bosses on the gun shell I; the other end of the bracket faces away from the gun barrel, and the axis of the round hole at the other end of the bracket is coaxial with the axes of the 2 bosses on the gun shell I and the gun shell II. The spring III is a spiral cylinder compression spring, the outer circle of the pressure head is in a stepped shape with two sections of large and small diameters, pressure heads are arranged at two ends of the pressure head, the large end of the pressure head is positioned in the spring III, the small end faces outwards, the large and small diameter joint faces of the pressure head are respectively parallel to the outer end faces of the pressing rings at two ends of the spring III, and a combination of 1 spring III and 2 pressure heads is arranged in a circular hole with a bracket coaxial with the axes of 2 bosses on the gun shell I and the gun shell II. The locking plate is in a mouse shape, the cross section of the locking plate is in a U-shaped groove shape, the U-shaped opening faces towards the abdomen of the mouse, 1 round hole is respectively arranged below the front part of the locking plate, namely, on the two side walls of the U-shaped groove, and the axes of the 2 round holes are coaxial and perpendicular to the longitudinal symmetry plane of the mouse of the locking plate; the distance between the axes of the 2 semicircular grooves and the axes of the 2 round holes below the front part of the locking plate is equal to the distance between the axes of the round holes at one end of the bracket far away from the bracket shaft and the axes of the round holes in the middle of the bracket; the upper part of the front part of the locking plate upwards extends out of the 1 boss towards the direction away from the front circular hole, and the end part of the boss is provided with a circular hole with the axis perpendicular to the longitudinal symmetrical surface of the locking plate; the round holes below the front part of the locking plate are hinged in the round holes in the middle of the bracket through a pin shaft IV, the bottom surface of the U-shaped groove of the locking plate is positioned above the bracket, the round holes below the front part of the locking plate are respectively positioned on two sides of the bracket, and the 2 semicircular grooves below the rear part of the locking plate face the gun handle direction of the gun body. The short rocker arm shaft is supported on the plate surface of the support plate I towards the side of the support plate II through lugs, the short rocker arm shaft is positioned in the inner cavity of the gun shell I, and the axis of the short rocker arm shaft is parallel to the joint surface of the gun shell I and the gun shell II and parallel to the plate surface of the support plate I; one end of the short rocker arm I is fixed at the end part of the short rocker arm shaft extending out of the lug, and one end of the short rocker arm I, which is far away from the short rocker arm shaft, is horizontally directed to the gun shell II; one end of the short rocker arm II is fixed at the end of the short rocker arm shaft extending below the lug, and one end of the short rocker arm II, which is far away from the short rocker arm shaft, is horizontally directed to the tail of the gun body. One end of the pull rod is hinged to the end part of the short rocker arm I, which is far away from the short rocker arm shaft, and the other end of the pull rod is hinged to the round hole of the boss end part extending upwards above the front part of the locking plate.

The working principle is as follows: when the injector is used for absorbing liquid, the trigger of the injector is in an un-actuated state, namely in a reset state, and the injection button is in an un-pressed state. One end of the infusion tube is sleeved on a conical tube of the injection booster for dual-purpose injection, and the other end of the infusion tube is inserted into a bottle containing liquid. An operator simultaneously presses the liquid suction buttons positioned on the outer sides of a gun shell I and a gun shell II of the gun body by two fingers, after a spring II is compressed, a liquid suction push rod is used for pushing a transmission pin positioned at the opposite angle of a longer extending water chestnut of a trigger, namely in 2U-shaped side round holes of a U-shaped groove, to simultaneously slide inwards from two sides, and then a spring III is compressed by a pressure head; when the distance between the large-diameter joint surface and the small-diameter joint surface of the 2 pressing heads at the two ends of the spring III is smaller than or equal to the distance between the inner surfaces of the two side surfaces of the U-shaped groove of the locking plate, the locking plate swings around the pin shaft IV hinged in the round hole in the middle of the bracket towards the center direction of the pressing head, and the arc surfaces of the 2 semicircular grooves below the rear part of the locking plate are in contact with the small-section outer cylindrical surface of the pressing head. At this time, the compressed spring iii cannot be extended due to the restriction of the locking piece, and the driving pins at both sides cannot be pushed outward by the pressing head. Thus, the inner ends of the 2 driving pins are hinged with one ends of the 2 connecting rods I respectively, and the outer ends are completely separated from the chain piece. Simultaneously, the liquid suction button is reset under the action of the spring II.

The gun handle is held by an operator, the trigger is pulled by fingers, after the spring I is compressed by the trigger, the connecting rod I is driven by the transmission pin, one end of the rocker arm, which is close to the auxiliary push rod, swings towards the direction close to the gun barrel, and the other end of the rocker arm swings towards the direction far away from the gun barrel by the middle of the rocker arm, so that the farthest end of the rocker arm far away from the rocker shaft drives the auxiliary push sleeve sleeved on the excircle of the clamping sleeve close to the gun barrel through the connecting rod III, and slides towards the direction far away from the gun barrel. Because the one end that the clamping sleeve kept away from the barrel is equipped with outer cone pipe section, and the cylinder pipe section of clamping sleeve is kept away from to outer cone pipe section's big end, the clamping sleeve evenly cuts along the circumferencial direction of clamping sleeve has a plurality of grooves, and the clamping sleeve has elasticity. When the boosting sleeve slides from the cylindrical section of the clamping sleeve to the outer conical section, the inner diameter of the boosting sleeve is smaller than the diameter of the large end of the outer conical section of the clamping sleeve, so that the boosting sleeve gradually clamps the clamping sleeve on the boosting rod through the outer conical section of the clamping sleeve, thereby driving the boosting rod and driving the plunger rod and the plunger to move towards a direction away from the closed end of the injection tube through the transmission plate. The negative pressure is created by the progressive increase in the volume of the interior chamber formed by the plunger, the inside diameter of the syringe and the closed end of the syringe, so that liquid within the bottle is drawn into the syringe.

After the liquid is sucked once, the trigger is loosened, the trigger is reset under the action of the spring I, and the boosting sleeve is driven to slide towards the direction approaching to the gun barrel according to the opposite transmission route. Because of the outer conical tube section and the elastic effect of one end of the clamping sleeve, the boosting sleeve can loosen the clamping sleeve clamped on the boosting rod, so that the boosting sleeve can not stir the clamping sleeve to slide at the initial stage of trigger reset, and the boosting rod can stay in place; only when the boosting sleeve contacts with the outer circular shoulder of the clamping sleeve, the clamping sleeve is driven to slide through the shoulder. However, since the clamping sleeve does not clamp the push rod, the plunger and the like will remain in place, and the fluid pressure in the syringe will remain unchanged. When the trigger is fully reset, the trigger is pulled again to repeat the above action, i.e., to draw a portion of the fluid into the syringe again. The trigger is repeatedly pulled for a plurality of times, so that the liquid in the bottle can be continuously sucked into the injection tube. The two sides of the outer cylindrical surface of the injection tube are provided with scale marks, so that the quantity of sucked liquid can be accurately controlled, when the quantity of liquid in the injection tube reaches the requirement, the trigger is stopped to be pulled, and then the infusion tube sleeved on the conical tube of the injection tube is pulled off.

When in injection, the trigger is in an un-actuated state, namely in a reset state, the liquid suction button is in an un-pressed state, and the infusion tube which is arranged in the puerperal body and extends out of the disposable cervical dilation balloon is sleeved on the conical tube of the injection tube. After the injection button positioned on the outer side of the gun shell I of the gun body is pressed by an operator, the end part of the short rocker arm II far away from the short rocker arm shaft is pushed by the semispherical head of the injection push rod to swing towards the direction far away from the gun shell I, the short rocker arm I is driven to swing towards the direction close to the gun barrel by the short rocker arm shaft, the locking plate is pulled to rotate around the pin shaft IV by the pull rod, and the 2 semicircular grooves below the rear part of the locking plate swing towards the direction far away from the pressure head. Once the locking tab is out of the limit on the ram and spring iii, spring iii will suddenly elongate and push the drive pin outward through the ram. At this time, the inner end of the 2 driving pins is completely separated from the connecting rod I, and the outer ends are respectively hinged with one ends of the 2 chain pieces. Simultaneously, release the finger, injection button resets under the effect of spring II.

After an operator holds the gun handle of the gun body and pulls the trigger to compress the spring I, the shifting fork is pulled by the chain piece to swing around the shifting fork shaft towards the direction approaching to the gun barrel; simultaneously, the shifting fork is shifted through the U-shaped groove arranged at one end of the shifting fork and sleeved on the boosting sleeve far away from the excircle of the clamping sleeve of the gun barrel to slide towards the direction close to the gun barrel. Similarly, the plunger rod and the plunger are driven by the drive plate to move towards the closed end of the syringe, so that a part of liquid in the syringe is injected into the disposable cervical dilation balloon in the puerperal body due to the pressure increase in the syringe.

After one liquid injection is completed, the trigger is loosened, the trigger is reset under the action of the spring I, and the boosting sleeve is driven to slide towards the direction away from the gun barrel according to the opposite transmission route. For the same reasons as described above, the clamping sleeve does not clamp the push rod, and therefore the push rod, as well as the plunger rod, plunger etc., will remain stationary in place and the fluid pressure in the syringe will remain unchanged. When the trigger is completely reset, the trigger is pulled again to repeat the above actions, namely, a part of liquid is injected into the disposable cervical dilation balloon in the puerperal body again. The trigger is repeatedly pulled for a plurality of times, so that the liquid can be continuously injected into the disposable cervical dilation balloon. The quantity of the injected liquid can be accurately controlled through the scale marks arranged on the two sides of the outer cylindrical surface of the injection tube, and the injection is stopped when the cervical orifice and the vagina of the puerpera reach the expected expansion degree.

Compared with the prior art, the gun has the advantages that the conversion device is arranged, the boosting mechanism in the gun body is provided with 2 transmission routes which can be freely converted, and the directions of 2 clamping sleeves in the 2 routes sleeved on the same 1 boosting rod are opposite; the large end of the outer conical tube section with one end of the elastic clamping sleeve is far away from the cylindrical tube section of the clamping sleeve, and a plurality of grooves are uniformly cut along the circumferential direction of the clamping sleeve, so that when the boosting sleeve slides from the cylindrical section of the clamping sleeve to the outer conical section, the clamping sleeve can be gradually clamped on the boosting rod, the boosting rod is driven, and the plunger is driven to move through the transmission plate. When the liquid suction button is pressed down and a route II is selected, the trigger is pulled to suck the liquid in the bottle into the injection tube; when the injection button is pressed down and the route I is selected, the liquid in the injection tube can be injected into the disposable cervical dilation balloon in the puerpera by pulling the trigger. Therefore, time and labor are saved, and the labor intensity of operators is greatly reduced. Because the two sides of the outer circle of the injection tube are provided with the scale marks, the quantity of liquid sucked into the injection tube or injected into the puerpera can be accurately controlled, the pain of the puerpera caused by the overlarge quantity of the input liquid can be avoided, and the effect of expanding the cervical orifice and the vagina due to the insufficient quantity can be avoided.

Drawings

FIG. 1 is an isometric view of an embodiment of the invention with a pipette button in an unpressed reset state, an injection button in a depressed reset state, a trigger pulled to a limit, and a plunger advanced to empty liquid in a syringe;

FIG. 2 is an isometric view of the embodiment of the invention shown in FIG. 1 with the gun housing I hidden, the pipette button in an unpressed reset state, the injection button in a depressed reset state, the trigger pulled to a limit, and the plunger advanced to the liquid in the syringe in an empty state;

FIG. 3 is an isometric view of the embodiment of the invention shown in FIG. 1 with the concealed gun housing I, the pipette button in an unpressed reset state, the injection button in a depressed reset state, the trigger reset, and the plunger advanced to the empty state of the liquid in the syringe;

FIG. 4 is an isometric view of the embodiment of the invention shown in FIG. 1 with the gun housing I hidden, the pipette button in a reset condition after depression, the injection button in an unpressed reset condition, the trigger pulled to a limit, and the plunger retracted to a state where the fluid in the syringe is increased to a maximum volume;

FIG. 5 is an isometric view of the embodiment of the invention shown in FIG. 1 with the pipette button in a depressed reset state, with the injection button in an unpressed reset state, and with the trigger reset, with the injection button, injection plunger, spring I, short rocker II, short rocker arm shaft, lugs, tie rods, locking tabs, brackets, bracket shafts, drive pins, and trigger combination;

FIG. 6 is an isometric view of the embodiment of the invention shown in FIG. 1 with the pipette button in an unpressed reset state, the injection button in a pressed state, and the trigger reset, the injection button, injection plunger, spring I, short rocker arm II, short rocker arm shaft, lug, pull rod, locking tab, bracket shaft, drive pin, spring III, and trigger combination;

FIG. 7 is an isometric view of the embodiment of the invention shown in FIG. 1 with the fluid-absorbent button in a depressed state, the injection button in an unpressed reset state, the locking tab in a locked state against spring III, and the trigger reset, the fluid-absorbent button, fluid-absorbent push rod, spring I, locking tab, bracket, drive pin, and trigger assembly;

FIG. 8 is an isometric view of the combination of the pipette button, pipette push rod, spring I, locking tab, bracket, spring III, ram, drive pin, and trigger of the embodiment of the invention shown in FIG. 1 in the unpressed reset state, the injection button in the depressed state, the locking tab in the relaxed state against spring III, and the trigger reset;

FIG. 9 is an isometric view of the gun housing I of the embodiment of FIG. 1 in accordance with the present invention;

Fig. 10 is an isometric view of the gun case ii of the embodiment of the invention shown in fig. 1.

Detailed Description

1. Syringe 2, plunger 3, plunger rod 4, conical tube 5, gun case i 6, gun case ii 7, support plate i 8, support plate ii 9, sleeve i 10, sleeve ii 11, pin i 12, yoke 13, boss 14, trigger 15, trigger shaft 16, drive pin 17, spring i 18, grip sleeve 19, booster sleeve 20, booster 21, fork 22, link 23, pin ii 24, pin iii 25, drive plate 26, fork shaft 27, rocker arm 28, rocker 29, rocker arm shaft 30, link i 31, rocker arm shaft 32, link ii 33, link iii 34, limit cap 35, bracket 36, bracket shaft 37, lock tab 38, short rocker arm shaft 39, pull rod 40, fluid suction button 41, injection button 42, fluid suction push rod 43, injection push rod 44, spring ii 45, spring iii 46, pressure head 47, pin iv 48, lug 49, short rocker arm i 50, short rocker arm ii.

In the embodiment shown in fig. 1-10: the injection tube 1 is in a transparent state, one end of the injection tube is closed, shoulder shoulders are arranged on the outer circles of the two ends of the injection tube, and 0-line scale marks positioned at the closed end are arranged on the two sides of the outer cylindrical surface of the injection tube 1 along the length direction of the injection tube 1; the closed end of the injection tube 1 extends outwards to form a section of conical tube 4, the conical tube 4 is positioned on the symmetrical surface of scale marks on two sides, the outer diameter of one end of the conical tube 4 close to the injection tube 1 is large, the outer diameter of one end of the conical tube 4 far away from the injection tube 1 is small, and the axis of the conical tube 4 is parallel to the axis of the injection tube 1; the outer diameter of the plunger 2 is larger than the inner diameter of the injection tube 1, the difference between the outer diameter of the plunger 2 and the inner diameter of the injection tube 1 is equal to 0.2mm-0.5mm, one end of the plunger rod 3 is provided with the plunger 2, and one end provided with the plunger 2 is inserted into the injection tube 1 from the opening end of the injection tube 1. The inner cavity of the gun body of the boosting gun is in a hollow thin shell shape and a pistol shape, a supporting plate I7 is arranged in the inner cavity of the joint part of the gun barrel of the gun body and the gun body, a supporting plate II 8 is arranged in the inner cavity of the joint part of the tail part and the gun body, round holes are formed in the supporting plate I7 and the supporting plate II 8, and the axes of the 2 round holes are coaxial; a sleeve I9 is arranged between the support plate I7 and the foremost end of the inner cavity of the gun barrel, a sleeve II 10 is arranged between the support plate II 8 and the rearmost end of the inner cavity of the tail part, and the axes of the sleeve I9 and the sleeve II 10 are coaxial with the common axis of round holes on the support plate I7 and the support plate II 8; the outermost ends of the tail parts of the gun shell I5 and the gun shell II 6 are provided with round holes, the centers of the round holes are positioned on the axis of the sleeve II 10, the diameter of the round holes is equal to the inner diameter of the sleeve II 10, 1 pin shaft I11 extends out of the inner surfaces of the gun body parts of the gun shell I5 and the gun shell II 6 respectively, and the axes of 2 pin shafts I11 are coaxial; the middle part above the gun body is provided with an arc groove smaller than a semicircle, the radius of the arc groove is equal to half of the outer diameter of the injection tube 1, the length of the arc groove is smaller than the total length from the front end of the gun barrel to the tail part of the gun shell, and the axis of the arc groove is parallel to the common axis of the sleeve I9 and the sleeve II 10. The two ends of the injection tube 1 are arranged in the circular arc groove above the gun body through the clamp 12, and one end of the injection tube 4 extending out of the circular arc groove faces the direction of the gun barrel away from one end of the gun body. The gun bodies of the gun shell I5 and the gun shell II 6 respectively extend out of 1 cylindrical boss 13 towards the inner side of the inner surface of one side of the gun barrel, and the axes of the 2 cylindrical bosses 13 are coaxial; the outer surfaces of the gun shell I5 and the gun shell II 6, which correspond to the boss 13 on the inner surface, are provided with round holes, the round holes are blind holes, the axes of the 2 blind holes are coaxial, and the axes of the blind holes are coaxial with the axis of the boss 13; a through round hole is formed between the inner end face of the boss 13 on the inner surface of the gun shell I5 and the outer surface of the gun shell I5, a through round hole is also formed between the inner end face of the boss 13 on the inner surface of the gun shell II 6 and the outer surface of the gun shell II 6, the axes of the through round holes of 2 pieces are coaxial, the axes of the through round holes are coaxial with the axes of the bosses 13, and the diameter of the through round hole is smaller than the diameter of a coaxial blind hole. The inner surface of the gun shell I5 is positioned between the boss 13 and the support plate I7, another 1 boss 13 is arranged, a blind hole is also arranged on the outer surface of the gun shell I5 corresponding to the boss 13 on the inner surface, and the axis of the blind hole is coaxial with the axis of the boss 13; a through round hole is arranged between the inner end face of the boss 13 on the inner surface of the gun shell I5 and the outer surface of the gun shell I5, the axis of the through round hole is coaxial with the axis of the boss 13, and the diameter of the through round hole is smaller than the diameter of the coaxial blind hole. The boosting mechanism is divided into 2 transmission routes of a route I and a route II, wherein in the route I: the trigger 14 is diamond-shaped, and two side faces of the extended water chestnut with a longer length perpendicular to the plane direction of the diamond are respectively concave arc-shaped and convex arc-shaped; a U-shaped groove is arranged at the position of the longer water chestnut extending from the trigger 14 and opposite to the longer water chestnut, and the symmetrical surfaces of 2U-shaped side surfaces of the U-shaped groove are overlapped with the symmetrical surfaces of the diamond-shaped plane of the trigger 14 in the direction perpendicular to the diamond-shaped plane; the middle part of the trigger 14 is provided with a round hole with the axis perpendicular to the plane of the diamond, the diamond part extending out of the opposite angle of the longer diamond, namely, the 2U-shaped side surfaces of the U-shaped groove are respectively provided with 1 round hole, the axes of the 2 round holes on the 2U-shaped side surfaces are coaxial, and the axes of the 2 round holes are perpendicular to the symmetrical surfaces of the 2U-shaped side surfaces of the U-shaped groove, namely, the axes are parallel to the axes of the round holes in the middle part of the trigger 14; one end, close to the longer water chestnut, of the middle part of the trigger 14 extends out, and one side, close to the longer water chestnut, of the convex cambered surface extends out 1 pin II 23,2 pin II 23 coaxially along the direction perpendicular to the diamond plane, and the axis of the pin II 23 is parallel to the axis of a round hole in the middle part of the trigger 14; the trigger 14 is installed in the middle of the trigger shaft 15 through a round hole in the middle, 1 transmission pin 16 is respectively arranged in round holes in the 2U-shaped side faces of the trigger 14, two ends of the trigger shaft 15 are respectively supported at the gun bodies of the gun shells I5 and II 6 and are close to the gun barrel, and when one end of the trigger 14 extending longer water chestnut faces towards the gun handle, the concave cambered surface of the trigger 14 extending longer water chestnut faces towards one side of the gun barrel. The spring I17 is a torsion spring, 1 piece is arranged in the left-handed and right-handed symmetry, the spring wires at two ends of 2 pieces of springs I17 extend out of 1 section of straight line section along the radial direction of the spring I17, the tail ends of the straight line section are respectively provided with a winding lug, the winding lugs at one end of each 1 piece of springs I17 in the left-handed and right-handed symmetry are respectively sleeved and hung on a pin shaft I11 arranged on the inner surfaces of the gun shell I5 and the gun shell II 6, and the winding lugs at the other end are respectively sleeved and hung on a pin shaft II 23 arranged on two side surfaces of the trigger 14. The clamping sleeve 18 is cylindrical, a shoulder is arranged on the outer circle of one end of the clamping sleeve 18, an outer conical tube section is arranged on the other end of the clamping sleeve, the large end of the outer conical tube section is far away from the cylindrical tube section of the clamping sleeve 18, the diameter of the small end of the outer conical tube section is equal to the outer diameter of the cylindrical tube section of the clamping sleeve 18, 8 grooves are uniformly cut in the clamping sleeve 18 along the circumferential direction of the clamping sleeve 18, the boosting sleeve 19 is in a circular tube shape, the inner diameter of the boosting sleeve 19 is equal to the outer diameter of the cylindrical tube section of the clamping sleeve 18, 1 pin III 24 extends outwards symmetrically on two sides of the middle of the outer circle of the boosting sleeve 19, and 2 pins III 24 are coaxial. The auxiliary push rod 20 is inserted into the sleeve II 10 from the tail of the gun body, 2 clamping sleeves 18 are sleeved at the extending end of the auxiliary push rod, which passes through the supporting plate II 8, one end, with a groove, of the 1 clamping sleeve 18, which is close to the supporting plate II 8 faces to one side of the gun barrel, and the other end, with a groove, of the other 1 clamping sleeve 18, which is close to the supporting plate I7 faces away from one side of the gun barrel; the outer circles of the 2 clamping sleeves 18 are respectively sleeved with a boosting sleeve 19, and the boosting rod 20 penetrates through the 2 clamping sleeves 18 and the extended ends of the boosting sleeves 19 and is inserted into the sleeve I9; the other end of the push rod 20 remote from the sleeve i 9 is connected to the protruding end of the plunger rod 3 after insertion into the syringe 1 via a transmission plate 25. One end of a shifting fork 21 in a rectangular flat plate shape is provided with a U-shaped groove, the symmetrical surface of the U-shaped groove coincides with the symmetrical surface of the shifting fork 21 in the width direction of the rectangular plate surface, the other end and the middle part of the shifting fork 21 are provided with round holes, 2 round hole axes are positioned on the symmetrical surface of the shifting fork 21 in the width direction of the rectangular plate surface, 2 shifting forks 21 are respectively fixed at two ends of a shifting fork shaft 26 through round holes at one end, the round hole axes at the middle part of the 2 shifting forks 21 are coaxial, and the symmetrical surfaces of the U-shaped grooves at one end of the 2 shifting forks 21 coincide; the assembled combination of the shifting fork 21 and the shifting fork shaft 26 is respectively supported at the positions of the gun bodies, close to the tail, of the gun bodies of the gun shell I5 and the gun shell II 6 through the extending ends of the shifting fork shaft 26 after penetrating through the shifting fork 21, and 2 pin shafts III 24 extending out of the excircle of the boosting sleeve 19, close to the supporting plate II 8, are respectively positioned in U-shaped grooves of the 2 shifting forks 21; one end of the 2-piece chain piece 22 is respectively hinged in a round hole in the middle of the 2-piece shifting fork 21, and when the transmission pin 16 arranged on the trigger 14 slides out of two side surfaces of the U-shaped groove, the other end of the 2-piece chain piece 22 is respectively hinged at the outer end part of the 2-piece transmission pin 16. In route II: round holes are formed in the two ends and the middle of the rocker arm 27, the axes of the 3 holes are parallel, 2 rocker arms 27 are respectively fixed at the two ends of the rocker arm shaft 29 through the round holes in the middle, and the axes of the round holes at the two ends of the 2 rocker arms 27 are respectively coaxial; the assembly formed by assembling the 2 rocker arms 27 and the 1 rocker arm shaft 29 is respectively supported in the middle parts of the gun bodies of the gun shell I5 and the gun shell II 6 of the gun body through the extending ends of the two ends of the rocker arm shaft 29, which penetrate through the rocker arms 27; one end of the 2-piece connecting rod I30 is respectively hinged in a round hole at one end of the 2-piece rocker arm 27, and when the transmission pin 16 arranged on the trigger 14 slides into two side surfaces of the U-shaped groove, the other end of the 2-piece connecting rod I30 is respectively hinged at the end part of the inner end of the 2-piece transmission pin 16. Round holes are formed in the two ends and the middle of the rocker 28, the axes of the 3 holes are parallel, 2 rockers 28 are respectively fixed at the two ends of the rocker shaft 31 through round holes at one end, and the axes of the round holes at the middle and the other end of the 2 rockers 28 are respectively coaxial; the assembled body of the 2 rocking bars 28 and the 1 rocking bar shaft 31 is respectively supported at the positions of the gun bodies, close to the gun handles, of the gun shells I5 and II 6 of the gun body through the protruding ends of the rocking bars 31 after penetrating through the rocking bars 28; one end of the 2 connecting rods II 32 is respectively hinged in the round holes in the middle of the 2 rocking rods 28, and the other end of the 2 rocking rods 27 is respectively hinged in the round holes in the other end of the 2 rocking rods 27 away from the connecting rods I30; one end of the 2 connecting rods III 33 are respectively hinged in round holes at the other ends of the 2 rocking bars 28 far away from the rocking bar shaft 31, and the other ends are respectively sleeved and hung on 2 pin shafts III 24 extending out of the outer circle of the boosting sleeve 19 near the supporting plate I7. The button of the conversion device comprises a liquid suction button 40 and an injection button 41, the structural shapes and the sizes of the liquid suction button 40 and the injection button 41 are the same, the center of the 2 buttons in the shape of a disc extends out of a boss 1 toward one end, a blind hole is arranged at the other end far away from the boss, and the axis of the blind hole is coaxial with the axis of the boss; the push rod comprises a liquid suction push rod 42 and an injection push rod 43, wherein the liquid suction push rod 42 is cylindrical, and the injection push rod 43 is also cylindrical, but one end of the injection push rod is provided with a half ball head; one end of the liquid suction push rod 42 is arranged in the blind hole of the liquid suction button 40, and one end of the injection push rod 43, which is not provided with a semispherical head, is arranged in the blind hole of the injection button 41; the center of the disc-shaped limit cover 34 extends out of the boss 1 toward one end, a blind hole is formed in the other end far away from the boss, a round hole penetrating through the outer surface of the boss extending out of the other end of the limit cover 34 is formed in the bottom of the blind hole, and the axis of the blind hole and the axis of the penetrating round hole are coaxial with the axis of the boss. The spring II 44 is a spiral cylindrical compression spring, 2 springs II 44 are respectively arranged in round holes which are arranged on the outer surface of the gun shell I5 and the gun shell II 6 and correspond to the boss 13 on the inner surface, and the liquid suction push rod 42 of the 2 liquid suction button 40 and liquid suction push rod 42 combination body respectively passes through the 2 springs II 44 and then respectively passes through round holes which are communicated between the inner end surface and the outer surface of the boss 13 on the inner surface of the gun shell I5 and the gun shell II 6 and then is inserted into the gun body; the 2 limiting covers 34 are respectively installed on the outer surfaces of the gun shell I5 and the gun shell II 6 after compressing the springs II 44 through the disc end faces of the liquid suction buttons 40, boss parts of the limiting covers 34 face outwards, and boss parts of the 2 liquid suction buttons 40 penetrate through round holes formed between the bottoms of blind holes of the limiting covers 34 and the outer surfaces of the bosses and then extend outwards. The other 1 spring II 44 is arranged in a round hole which is arranged on the outer surface of the gun shell I5 near the supporting plate I7 and corresponds to the boss 13 on the inner surface, and after the hemispherical head end of the injection push rod 43 of the combination of the 1 injection button 41 and the injection push rod 43 passes through the spring II 44, the hemispherical head end passes through a round hole which is arranged on the inner surface of the gun shell I5 near the supporting plate I7 and is communicated with the outer surface between the inner end surface of the boss 13 on the inner surface and is inserted into the gun body; in addition, the 1 piece of limiting cover 34 is arranged on the outer surface of the gun shell I5 after compressing the spring II 44 through the disc end face of the injection button 41, the boss part of the limiting cover 34 faces outwards, and the boss part of the injection button 41 extends outwards after passing through a round hole which is arranged between the bottom of a blind hole of the limiting cover 34 and the outer surface of the boss. The bracket 35 is J-shaped, round holes are formed in the two ends and the middle of the bracket 35, the axes of the 3 round holes are perpendicular to the J-shaped plane of the bracket 35, the bracket 35 is arranged in the middle of the bracket shaft 36 through the round hole at one end, the two ends of the bracket shaft 36 are respectively supported on one sides of the gun bodies of the gun shell I5 and the gun shell II 6, which are close to the gun barrel, and the supporting point of the bracket shaft 36 on the gun shell I5 is positioned between 2 bosses 13 on the gun shell I5; the other end of the bracket 35 faces away from the barrel, and the axis of the round hole at the other end of the bracket 35 is coaxial with the axes of the 2 bosses 13 on the gun cases I5 and II 6. The spring III 45 is a spiral cylinder compression spring, the outer circle of the pressure head 46 is in a stepped shape with two sections of large and small diameters, the pressure heads 46 are arranged at the two ends of the spring III 45, the large end of the pressure head 46 is positioned in the spring III 45, the small end faces outwards face, the large and small diameter joint faces of the pressure heads 46 are respectively flush with the outer end faces of the pressing rings at the two ends of the spring III 45, and the combination of 1 spring III 45 and 2 pressure heads 46 is arranged in a circular hole coaxial with the axes of the 2 bosses 13 on the gun shell I5 and the gun shell II 6 of the bracket 35. The locking plate 37 is in a mouse shape, the cross section of the locking plate is in a U-shaped groove shape, the U-shaped opening faces towards the abdomen of the mouse, 1 round hole is respectively arranged below the front part of the locking plate 37, namely, on the two side walls of the U-shaped groove, and the axes of the 2 round holes are coaxial and perpendicular to the longitudinal symmetry plane of the mouse of the locking plate 37; the distance between the axes of the 2 semicircular grooves and the axes of the 2 round holes below the front part of the locking piece 37 is equal to the distance between the axes of the round holes of the bracket 35 at the end far away from the bracket shaft 36 and the axes of the round holes in the middle of the bracket 35; the upper part of the front part of the locking plate 37 upwards extends out of the 1 boss towards the direction away from the front circular hole, and the end part of the boss is provided with a circular hole with the axis perpendicular to the longitudinal symmetrical surface of the locking plate 37; the 2 round holes below the front part of the locking plate 37 are hinged in the round holes in the middle of the bracket 35 through a pin shaft IV 47, the U-shaped groove bottom surface of the locking plate 37 is positioned above the bracket 35, the 2 round holes below the front part of the locking plate 37 are respectively positioned on two sides of the bracket 35, and the 2 semicircular grooves below the rear part of the locking plate 37 face the gun handle direction of the gun body. The short rocker arm shaft 38 is supported on the surface of the support plate I7 towards the support plate II 8 through lugs 48, the short rocker arm shaft 38 is positioned in the inner cavity of the gun shell I5, and the axis of the short rocker arm shaft 38 is parallel to the joint surface of the gun shell I5 and the gun shell II 6 and parallel to the surface of the support plate I7; one end of a short rocker arm I49 is fixed to the end of the short rocker arm shaft 38 extending above the lug 48, and one end of the short rocker arm I49 away from the short rocker arm shaft 38 is horizontally directed toward the gun housing II 6; one end of the short rocker arm II 50 is fixed to the end of the short rocker arm shaft 38 that protrudes below the lug 48, and the end of the short rocker arm II 50 that is remote from the short rocker arm shaft 38 is directed horizontally toward the tail of the gun body. One end of the pull rod 39 is hinged to the end of the short rocker arm I49 away from the short rocker arm shaft 38, and the other end is hinged to a circular hole in the boss end extending upward above the front part of the lock piece 37.

Claims

1. The utility model provides a dual-purpose injection booster of inhaling that is used for dilating lying-in woman's cervical orifice and vagina, includes syringe and boost gun, and wherein the syringe includes syringe (1), plunger (2) and plunger rod (3), and syringe (1) is transparent state, and one end is sealed, and both ends excircle all is equipped with the convex shoulder, and the both sides of syringe (1) outer cylinder are equipped with 0 line along the length direction of syringe (1) and are located the scale mark of blind end; the closed end of the injection tube (1) extends outwards to form a section of conical tube (4), the conical tube (4) is positioned on the symmetrical plane of scale marks on two sides, the outer diameter of one end of the conical tube (4) close to the injection tube (1) is large, the outer diameter of one end of the conical tube far away from the injection tube (1) is small, and the axis of the conical tube (4) is parallel to the axis of the injection tube (1); the outer diameter of the plunger (2) is larger than the inner diameter of the injection tube (1), the difference between the outer diameter of the plunger (2) and the inner diameter of the injection tube (1) is equal to 0.2mm-0.5mm, one end of the plunger rod (3) is provided with the plunger (2), and one end provided with the plunger (2) is inserted into the injection tube (1) from the opening end of the injection tube (1); the boosting gun comprises a gun body, a boosting mechanism and a conversion device, wherein the inner cavity of the gun body is in a hollow thin shell shape and a pistol shape, the gun body comprises a gun shell I (5) and a gun shell II (6) which are bilaterally symmetrical, a supporting plate and a sleeve, and the whole gun body formed by the gun shell I (5) and the gun shell II (6) is divided into a gun body in the middle, a gun barrel in the front, a gun handle which is far away from the rear upper part of the gun barrel and a gun handle which is positioned below; a bearing plate I (7) is arranged in the inner cavity of the joint of the gun barrel and the gun body, a bearing plate II (8) is arranged in the inner cavity of the joint of the tail and the gun body, round holes are formed in the bearing plate I (7) and the bearing plate II (8), and the axes of the 2 round holes are coaxial; a sleeve I (9) is arranged between the support plate I (7) and the foremost end of the inner cavity of the gun barrel, a sleeve II (10) is arranged between the support plate II (8) and the rearmost end of the inner cavity of the tail part, and the axes of the sleeve I (9) and the sleeve II (10) are coaxial with the common axis of round holes on the support plate I (7) and the support plate II (8); the outermost ends of the tail parts of the gun shell I (5) and the gun shell II (6) are provided with round holes, the centers of the round holes are positioned on the axis of the sleeve II (10), the diameter of the round holes is equal to the inner diameter of the sleeve II (10), 1 pin shaft I (11) extends inwards from the inner surfaces of the gun body parts of the gun shell I (5) and the gun shell II (6), and the axes of 2 pin shafts I (11) are coaxial; the middle part above the gun body is provided with an arc groove smaller than a semicircle, the radius of the arc groove is equal to half of the outer diameter of the injection tube (1), the length of the arc groove is smaller than the total length from the front end of the gun barrel to the tail part of the gun shell, and the axis of the arc groove is parallel to the common axis of the sleeve I (9) and the sleeve II (10); two ends of the injection tube (1) are arranged in an arc groove above the gun body through a clamp (12), and one end of the injection tube (4) extending out of the conical tube faces the direction of one end of the gun tube away from the gun body; the method is characterized in that: the inner surfaces of the gun bodies of the gun shell I (5) and the gun shell II (6) close to the gun barrel side are respectively extended with 1 piece of cylindrical boss (13), and the axes of the 2 pieces of bosses (13) are coaxial; round holes are formed in the outer surfaces of the gun shell I (5) and the gun shell II (6) corresponding to the boss (13) on the inner surface, the round holes are blind holes, the axes of the 2 blind holes are coaxial, and the axes of the blind holes are coaxial with the axis of the boss (13); a through round hole is formed between the inner end face of a boss (13) on the inner surface of the gun shell I (5) and the outer surface of the gun shell I (5), a through round hole is also formed between the inner end face of a boss (13) on the inner surface of the gun shell II (6) and the outer surface of the gun shell II (6), the axes of the 2 through round holes are coaxial, the axes of the through round holes are coaxial with the axes of the boss (13), and the diameter of the through round holes is smaller than the diameter of the coaxial blind holes; the inner surface of the gun shell I (5) is positioned between the boss (13) and the supporting plate I (7) and is also provided with another 1 boss (13), the outer surface of the gun shell I (5) corresponding to the boss (13) on the inner surface is also provided with a blind hole, and the axis of the blind hole is coaxial with the axis of the boss (13); a through round hole is arranged between the inner end surface of a boss (13) on the inner surface of the gun shell I (5) and the outer surface of the gun shell I (5), the axis of the through round hole is coaxial with the axis of the boss (13), and the diameter of the through round hole is smaller than the diameter of the coaxial blind hole; the boosting mechanism is divided into 2 transmission routes of a route I and a route II, wherein the route I comprises a trigger (14), a trigger shaft (15), a transmission pin (16), a spring I (17), a clamping sleeve (18), a boosting sleeve (19), a boosting rod (20), a shifting fork (21) and a chain piece (22), the trigger (14) is diamond-shaped, and two side surfaces of the extended water chestnut with a longer length, which are perpendicular to the plane direction of the diamond, are respectively concave arc-shaped and convex arc-shaped; a U-shaped groove is arranged at the position of the diagonal corner of the longer water chestnut, extending out of the trigger (14), and the symmetrical surfaces of the 2U-shaped side surfaces of the U-shaped groove are overlapped with the symmetrical surfaces of the diamond-shaped plane of the trigger (14) in the direction perpendicular to the diamond-shaped plane; the middle part of the trigger (14) is provided with a round hole with an axis perpendicular to the plane of the diamond, the diamond part extending out of the diagonal corner of the longer diamond, namely, the 2U-shaped side surfaces of the U-shaped groove are respectively provided with 1 round hole, the axes of the 2 round holes on the 2U-shaped side surfaces are coaxial, and the axes of the 2 round holes are perpendicular to the symmetrical surfaces of the 2U-shaped side surfaces of the U-shaped groove, namely, the axes are parallel to the axes of the round holes in the middle part of the trigger (14); the middle part of the trigger (14) is close to one end of the longer water chestnut, one side of the convex cambered surface close to the longer water chestnut extends out of 1 pin roll II (23) along the direction perpendicular to the diamond plane, 2 pin rolls II (23) are coaxial, and the axis of the pin roll II (23) is parallel to the axis of a round hole in the middle part of the trigger (14); the trigger (14) is arranged in the middle of the trigger shaft (15) through a round hole in the middle, 1 transmission pin (16) is respectively arranged in the round holes on the 2U-shaped side surfaces of the trigger (14), two ends of the trigger shaft (15) are respectively supported at the positions, close to the gun barrels, of the gun bodies of the gun shells I (5) and II (6), and when one end, stretching out of a longer water chestnut, of the trigger (14) faces towards the gun handle, a concave cambered surface, stretching out of the longer water chestnut, of the trigger (14) faces towards one side of the gun barrel; the spring I (17) is a torsion spring, 1 piece is arranged in the left-handed and right-handed symmetry, the spring wires at two ends of the 2 pieces of spring I (17) extend out of 1 section of straight line section along the radial direction of the spring I (17), the tail ends of the straight line section are respectively provided with a winding lug, the winding lugs at one end of each 1 piece of spring I (17) in the left-handed and right-handed symmetry are respectively sleeved and hung on the pin shafts I (11) arranged on the inner surfaces of the gun shell I (5) and the gun shell II (6), and the winding lugs at the other end are respectively sleeved and hung on the pin shafts II (23) arranged on the two sides of the trigger (14); the outer circle of one end of the clamping sleeve (18) in a cylindrical pipe shape is provided with a shoulder, the other end of the clamping sleeve is provided with an outer conical pipe section, the large end of the outer conical pipe section is far away from the cylindrical pipe section of the clamping sleeve (18), the diameter of the small end of the outer conical pipe section is equal to the outer diameter of the cylindrical pipe section of the clamping sleeve (18), the clamping sleeve (18) is uniformly cut with a plurality of grooves along the circumferential direction of the clamping sleeve (18), the clamping sleeve is in a circular pipe shape, the two sides of the middle of the outer circle of the boosting sleeve (19) with the inner diameter equal to the outer diameter of the cylindrical pipe section of the clamping sleeve (18) symmetrically extend out 1 pin III (24), and 2 pin III (24) are coaxial; the auxiliary push rod (20) is inserted into the sleeve II (10) from the tail of the gun body, 2 clamping sleeves (18) are sleeved at the extending end of the auxiliary push rod, which penetrates through the supporting plate II (8), one end, with a groove, of the 1 clamping sleeve (18) close to the supporting plate II (8) faces to one side of the gun barrel, and the other end, with a groove, of the 1 clamping sleeve (18) close to the supporting plate I (7) faces to one side, back to the gun barrel; the outer circles of the 2 clamping sleeves (18) are respectively sleeved with a boosting sleeve (19), the boosting rod (20) penetrates through the 2 clamping sleeves (18) and the extending ends of the boosting sleeves (19) to be inserted into the sleeve I (9), and the other end, far away from the sleeve I (9), of the boosting rod (20) is connected with the extending ends of the plunger rod (3) inserted into the injection tube (1) through a transmission plate (25); one end of a shifting fork (21) in a rectangular flat plate shape is provided with a U-shaped groove, the symmetrical surface of the U-shaped groove coincides with the symmetrical surface of the shifting fork (21) in the width direction of the rectangular plate surface, the other end and the middle part of the shifting fork (21) are respectively provided with round holes, the axes of the 2 round holes are positioned on the symmetrical surface of the shifting fork (21) in the width direction of the rectangular plate surface, the 2 shifting forks (21) are respectively fixed at two ends of a shifting fork shaft (26) through the round holes at one end, the axes of the round holes at the middle part of the 2 shifting forks (21) are coaxial, and the symmetrical surfaces of the U-shaped grooves at one end of the 2 shifting forks (21) coincide; the assembled body of the shifting fork (21) and the shifting fork shaft (26) is respectively supported at the positions of the gun bodies, close to the tail, of the gun bodies of the gun shells I (5) and II (6) of the gun bodies through the extending ends of the shifting fork shaft (26) after penetrating through the shifting fork (21), and 2 pin shafts III (24) extending out of the excircles of the boosting sleeve (19) close to the supporting plate II (8) are respectively positioned in U-shaped grooves of the 2 shifting forks (21); one end of the 2 pieces of chain pieces (22) are respectively hinged in round holes in the middle of the 2 pieces of shifting forks (21), the other end of the 2 pieces of chain pieces (22) are respectively hinged at the end parts of the 2 pieces of transmission pins (16) arranged on the trigger (14) which slide out of the two side surfaces of the U-shaped groove; the route II of the boosting mechanism comprises a trigger (14), a trigger shaft (15), a transmission pin (16), a spring I (17), a clamping sleeve (18), a boosting sleeve (19), a boosting rod (20), a rocker arm (27), a rocker arm (28) and a connecting rod, wherein round holes are formed in the two ends and the middle of the rocker arm (27), the axes of 3 holes are parallel, 2 rocker arms (27) are respectively fixed at the two ends of a rocker arm shaft (29) through the round holes in the middle, and the round hole axes of the two ends of 2 rocker arms (27) are coaxial; the assembly body formed by assembling the rocker arm (27) and the rocker arm shaft (29) is respectively supported at the middle parts of the gun bodies of the gun shell I (5) and the gun shell II (6) of the gun body through the extending ends of the rocker arm shaft (29) after penetrating through the rocker arm (27); one end of the 2 connecting rods I (30) is respectively hinged in a round hole at one end of the 2 rocker arms (27), the other end of the 2 connecting rods I (30) is respectively hinged at the end parts of 2 transmission pins (16) arranged on the trigger (14) and slide into two side surfaces of the U-shaped groove; round holes are formed in the two ends and the middle of each rocker (28), the axes of the 3 holes are parallel, 2 rockers (28) are respectively fixed at the two ends of a rocker shaft (31) through round holes at one end, and the axes of the round holes at the middle and the other end of the 2 rockers (28) are respectively coaxial; the assembled body of the rocker (28) and the rocker shaft (31) is respectively supported at the positions of the gun bodies, close to the gun handles, of the gun shells I (5) and II (6) of the gun body through the extending ends of the rocker shaft (31) after penetrating through the rocker (28); one end of the 2 connecting rods II (32) is respectively hinged in a round hole in the middle of the 2 rocking rods (28), and the other end of the 2 rocking rods II (27) is respectively hinged in a round hole in the other end of the 2 rocking rods II (30) far away from the connecting rods I; one end of the 2 connecting rods III (33) is respectively hinged in a round hole at the other end of the 2 rocking bars (28) far away from the rocking bar shaft (31), and the other end is respectively sleeved and hung on 2 pin shafts III (24) extending from the outer circle of the boosting sleeve (19) close to the supporting plate I (7); the conversion device comprises a button, a push rod, a limit cover (34), a bracket (35), a bracket shaft (36), a locking plate (37), a short rocker arm shaft (38) and a pull rod (39), wherein the button comprises a liquid suction button (40) and an injection button (41), the centers of 2 buttons with the same structural shape and size are in the shape of a disc, a boss extends out from one end of the button, a blind hole is arranged at the other end far from the boss, and the axis of the blind hole is coaxial with the axis of the boss; the push rod comprises a liquid suction push rod (42) and an injection push rod (43), the liquid suction push rod (42) is cylindrical, and one end of the injection push rod (43) which is cylindrical is provided with a semispherical head; one end of the liquid suction push rod (42) is arranged in a blind hole of the liquid suction button (40), and one end of the injection push rod (43) without the semispherical head is arranged in a blind hole of the injection button (41); the center of the disc-shaped limit cover (34) extends out of the boss 1 toward one end, a blind hole is formed in the other end far away from the boss, a round hole which is communicated with the outer surface of the boss extending out of the other end of the limit cover (34) is formed in the bottom of the blind hole, and the axis of the blind hole and the axis of the communicated round hole are coaxial with the axis of the boss; the spring II (44) is a helical cylindrical compression spring, 2 springs II (44) are respectively arranged in round holes which are arranged on the outer surface and correspond to the boss (13) on the inner surface of the gun shell I (5) and the gun shell II (6), and the liquid suction push rod (42) of the 2 liquid suction button (40) and liquid suction push rod (42) combination body respectively passes through the 2 springs II (44) and then respectively passes through round holes which are communicated between the inner end surface and the outer surface of the boss (13) on the inner surface of the gun shell I (5) and the gun shell II (6) and then is inserted into the gun body; the 2 limiting covers (34) are respectively arranged on the outer surfaces of the gun shell I (5) and the gun shell II (6) after compressing the spring II (44) through the disc end surfaces of the liquid suction buttons (40), boss parts of the limiting covers (34) face outwards, and boss parts of the 2 liquid suction buttons (40) penetrate through round holes formed between the bottoms of blind holes of the limiting covers (34) and the outer surfaces of the bosses and then extend outwards; in addition, 1 spring II (44) is arranged in a round hole which is arranged on the outer surface close to the supporting plate I (7) and corresponds to a boss (13) on the inner surface of the gun shell I (5), after the hemispherical head end of an injection push rod (43) of the combination of the 1 injection button (41) and the injection push rod (43) passes through the spring II (44), the hemispherical head end passes through a round hole which is communicated between the inner end surface and the outer surface of the boss (13) which is arranged on the inner surface close to the supporting plate I (7) of the gun shell I (5) and then is inserted into the gun body; the other 1 piece of limit cover (34) is arranged on the outer surface of the gun shell I (5) after compressing the spring II (44) through the disc end surface of the injection button (41), the boss part of the limit cover (34) faces outwards, and the boss part of the injection button (41) extends outwards after penetrating through a round hole arranged between the bottom of a blind hole of the limit cover (34) and the outer surface of the boss; the bracket (35) is J-shaped, round holes are formed in the two ends and the middle of the bracket (35), the axes of the 3 round holes are perpendicular to the J-shaped plane of the bracket (35), the bracket (35) is arranged in the middle of a bracket shaft (36) through the round hole at one end, the two ends of the bracket shaft (36) are respectively supported on one sides of a gun body, close to a gun barrel, of a gun shell I (5) and a gun shell II (6), and the supporting point of the bracket shaft (36) on the gun shell I (5) is positioned between 2 bosses (13) on the gun shell I (5); the other end of the bracket (35) faces away from the gun barrel, and the axis of a round hole at the other end of the bracket (35) is coaxial with the axes of 2 bosses (13) on the gun shell I (5) and the gun shell II (6); the spring III (45) is a spiral cylindrical compression spring, the outer circle of the pressure head (46) is in a stepped shape with two sections of large and small diameters, the two ends of the spring III (45) are respectively provided with the pressure head (46), the large end of the pressure head (46) is positioned in the spring III (45), the small end faces outwards, the large and small diameter joint faces of the pressure head (46) are respectively parallel to the outer end faces of the pressing rings at the two ends of the spring III (45), and the combination of 1 spring III (45) and 2 pressure heads (46) is arranged in a circular hole coaxial with the axes of the bracket (35) and the 2 bosses (13) on the gun shell I (5) and the gun shell II (6); the locking plate (37) is in a mouse shape, the cross section of the locking plate is in a U-shaped groove shape, the U-shaped opening faces towards the abdomen of the mouse, 1 round hole is respectively arranged below the front part of the locking plate (37), namely, on the two side walls of the U-shaped groove, the axes of the 2 round holes are coaxial, and the longitudinal symmetry plane of the mouse of the locking plate (37) is perpendicular; the distance between the axes of the 2 semicircular grooves and the axes of the 2 round holes below the front part of the locking plate (37) is equal to the distance between the axes of the round holes at one end of the bracket (35) far away from the bracket shaft (36) and the axes of the round holes in the middle of the bracket (35); the upper part of the front part of the locking plate (37) upwards extends out of the 1 boss towards the direction away from the round hole at the front part, and the end part of the boss is provided with a round hole with the axis perpendicular to the longitudinal symmetry plane of the locking plate (37); the 2 round holes below the front part of the locking plate (37) are hinged in the round hole in the middle of the bracket (35) through a pin shaft IV (47), the U-shaped groove bottom surface of the locking plate (37) is positioned above the bracket (35), the 2 round holes below the front part of the locking plate (37) are respectively positioned at two sides of the bracket (35), and the 2 semicircular grooves below the rear part of the locking plate (37) face the gun handle direction of the gun body; the short rocker arm shaft (38) is supported on the surface of the supporting plate I (7) towards the side of the supporting plate II (8) through lugs (48), the short rocker arm shaft (38) is positioned in the inner cavity of the gun shell I (5), and the axis of the short rocker arm shaft (38) is parallel to the joint surface of the gun shell I (5) and the gun shell II (6) and parallel to the surface of the supporting plate I (7); the short rocker arm comprises a short rocker arm I (49) and a short rocker arm II (50), one end of the short rocker arm I (49) is fixed at the end part of the short rocker arm shaft (38) extending out of the lug (48), and one end of the short rocker arm I (49) away from the short rocker arm shaft (38) is horizontally directed to the gun shell II (6); one end of a short rocker arm II (50) is fixed at the end part of the short rocker arm shaft (38) extending out of the lower part of the lug (48), and one end of the short rocker arm II (50) away from the short rocker arm shaft (38) horizontally points to the tail part of the gun body; one end of the pull rod (39) is hinged to the end part of the short rocker arm I (49) far away from the short rocker arm shaft (38), and the other end of the pull rod is hinged in a round hole of the boss end part extending upwards above the front part of the locking plate (37); when the suction and injection dual-purpose injection booster for dilating the cervical orifice and vagina of the puerperal women is used, the operation should be performed according to the following procedures: when the injector is used for absorbing liquid, the trigger of the injector booster gun is in an un-actuated state, namely in a reset state, and the injection button is in an un-pressed state; one end of the infusion tube is sleeved on a conical tube of the injection booster for dual-purpose injection, and the other end of the infusion tube is inserted into a bottle containing liquid; an operator simultaneously presses the liquid suction buttons positioned on the outer sides of a gun shell I and a gun shell II of the gun body by two fingers, after a spring II is compressed, a liquid suction push rod is used for pushing a transmission pin positioned at the opposite angle of a longer extending water chestnut of a trigger, namely in 2U-shaped side round holes of a U-shaped groove, to simultaneously slide inwards from two sides, and then a spring III is compressed by a pressure head; when the distance between the large-diameter joint surface and the small-diameter joint surface of the 2 pressing heads at the two ends of the spring III is smaller than or equal to the distance between the inner surfaces of the two side surfaces of the U-shaped groove of the locking plate, the locking plate swings around a pin shaft IV hinged in a round hole in the middle of the bracket towards the center direction of the pressing head until the arc surfaces of the 2 semicircular grooves below the rear part of the locking plate are attached to the small-section outer cylindrical surface of the pressing head; at this time, due to the limitation of the locking plate, the compressed spring III cannot be stretched, and the transmission pins at two sides cannot be pushed outwards through the pressure head; therefore, the inner ends of the 2 driving pins are respectively hinged with one ends of the 2 connecting rods I, and the outer ends are completely separated from the chain piece; simultaneously, the liquid suction button is reset under the action of the spring II; after an operator holds a gun handle and pulls a trigger by fingers, the trigger compresses a spring I, a transmission pin drives a connecting rod I, pulls one end of a rocker arm, which is close to an auxiliary push rod, to swing towards the direction, which is close to a gun barrel, and the other end of the rocker arm pulls the middle part of the rocker arm to swing towards the direction, which is far away from the gun barrel, through a connecting rod II, so that the farthest end, which is far away from a rocker shaft, of the rocker arm drives an auxiliary push sleeve sleeved on the excircle of a clamping sleeve, which is close to the gun barrel, to slide towards the direction, which is far away from the gun barrel, through a connecting rod III; because the outer conical tube section is arranged at one end of the clamping sleeve, which is far away from the gun barrel, and the cylindrical tube section of the clamping sleeve is far away from the large end of the outer conical tube section, a plurality of grooves are uniformly cut on the clamping sleeve along the circumferential direction of the clamping sleeve, and the clamping sleeve has elasticity; when the boosting sleeve slides from the cylindrical section of the clamping sleeve to the outer conical section, the inner diameter of the boosting sleeve is smaller than the diameter of the large end of the outer conical section of the clamping sleeve, so that the boosting sleeve gradually clamps the clamping sleeve on the boosting rod through the outer conical section of the clamping sleeve, thereby driving the boosting rod and driving the plunger rod and the plunger to move towards a direction away from the closed end of the injection tube through the transmission plate; the negative pressure is formed due to the gradual increase of the inner cavity volume formed by the plunger, the inner diameter of the injection tube and the closed end of the injection tube, so that the liquid in the bottle is sucked into the injection tube; after the liquid is sucked once, the trigger is loosened, the trigger is reset under the action of the spring I, and the boosting sleeve slides towards the direction approaching to the gun barrel; because of the outer conical tube section and the elastic effect of one end of the clamping sleeve, the boosting sleeve can loosen the clamping sleeve clamped on the boosting rod, so that the boosting sleeve can not stir the clamping sleeve to slide at the initial stage of trigger reset, and the boosting rod can stay in place; only when the boosting sleeve contacts with the outer circular shoulder of the clamping sleeve, the clamping sleeve is driven to slide by the shoulder; however, as the clamping sleeve does not clamp the auxiliary push rod, the plunger piston and the like still stay in place, and the liquid pressure in the injection tube also remains unchanged; when the trigger is completely reset, repeatedly pulling the trigger for a plurality of times, so that the liquid in the bottle can be continuously sucked into the injection tube; the two sides of the outer cylindrical surface of the injection tube are provided with scale marks, so that the quantity of sucked liquid can be accurately controlled, when the quantity of liquid in the injection tube reaches the requirement, the trigger is stopped to be pulled, and then the infusion tube sleeved on the conical tube of the injection tube is pulled off; when in injection, the trigger is in an un-actuated state, namely in a reset state, the liquid suction button is in an un-pressed state, and the infusion tube which is arranged in the puerperal body and extends out of the disposable cervical dilation balloon is sleeved on the conical tube of the injection tube; after an operator presses an injection button positioned on the outer side of a gun shell I of a gun body and compresses a spring II, a half ball head of an injection push rod pushes a short rocker arm II to swing away from the end part of a short rocker arm shaft and towards the direction away from the gun shell I, the short rocker arm I is driven to swing towards the direction close to a gun barrel through the short rocker arm shaft, a locking plate is pulled to rotate around a pin shaft IV through a pull rod, and 2 semicircular grooves below the rear part of the locking plate swing towards the direction away from the pressure head; once the locking tab is out of the limit of the ram and the spring iii, the spring iii will suddenly elongate and push the drive pin outwardly through the ram; at this time, the inner end of the 2 driving pins is completely separated from the connecting rod I, and the outer ends are respectively hinged with one ends of the 2 chain pieces; meanwhile, the finger is loosened, and the injection button is reset under the action of the spring II; after an operator holds the gun handle of the gun body and pulls the trigger to compress the spring I, the shifting fork is pulled by the chain piece to swing around the shifting fork shaft towards the direction approaching to the gun barrel; simultaneously, the shifting fork shifts the boosting sleeve sleeved on the excircle of the clamping sleeve far away from the gun barrel through a U-shaped groove arranged at one end of the shifting fork to slide towards the direction close to the gun barrel; similarly, the plunger rod and the plunger are driven by the transmission plate to move towards the closed end of the injection tube, so that part of liquid in the injection tube is injected into the disposable cervical dilation balloon in the puerpera due to the increase of the pressure in the injection tube; after one liquid injection is completed, the trigger is loosened, the trigger is reset under the action of the spring I, and the boosting sleeve slides towards the direction away from the gun barrel; because the clamping sleeve does not clamp the auxiliary push rod, the plunger piston and the like still stay in place, and the liquid pressure in the injection tube is kept unchanged; when the trigger is completely reset, repeatedly pulling the trigger for a plurality of times, so that the liquid can be continuously injected into the disposable cervical dilation balloon; the quantity of the injected liquid can be accurately controlled through the scale marks arranged on the two sides of the outer cylindrical surface of the injection tube, and the injection is stopped when the cervical orifice and the vagina of the puerpera reach the expected expansion degree.