CN214388230U - Portable pneumatic medicine dispensing system - Google Patents

Abstract

The utility model discloses a portable pneumatic medicine dispensing system, which comprises an operating handle connected with a gas circuit control unit and a medicine dissolving device detachably inserted on the operating handle, wherein the operating handle comprises a handle body, the gas circuit control unit is connected with an air filter detachably arranged on the handle body through the handle body, and the handle body is detachably connected with a needle cylinder body of the medicine dissolving device through a connector connected with the handle body; the connector comprises a connecting sleeve which is connected with the handle body and is in socket joint with the syringe body, the syringe body is provided with a flange connected with the connecting sleeve, and a limiting tightening mechanism used for tightening the flange is movably constructed on the connecting sleeve. The utility model discloses a dismouting is convenient, and life improves, has prevented that the leakproofness of operating handle and filter equipment junction from reducing, is applicable to the technical field of medical dispensing machine.

Description

Portable pneumatic medicine dispensing system

Technical Field

The utility model belongs to the technical field of medical the dispensing, specifically speaking relates to a pneumatic dispensing system of portable.

Background

At present, in nurse's the field of dispensing, because a large amount of repeated operations of dispensing of needs every day, and the process of dispensing all is in the environment that exposes, in order to reduce nurse's working strength, the medicine that reduces simultaneously to be equipped with is in clean environment, adopts electronic or pneumatic dispensing equipment to connect medicine dissolving device (syringe), and application mechanical transmission or pneumatic drive medicine dissolving device aspirate the liquid medicine, and then has realized reducing nurse's working strength, aseptic technique's purpose. However, the filter device of the existing dispensing equipment is inconvenient to replace, and the filter device needs to be integrally disassembled to be disposed as medical waste, so that the cost is too high, and the service life of the operating handle is too low due to hard frequent disassembly and assembly, and meanwhile, the sealing performance of the joint of the operating handle and the filter device is affected.

SUMMERY OF THE UTILITY MODEL

The utility model provides a realize that the dismouting is convenient, improve operating handle's life simultaneously, and prevent the medical pneumatic dispensing system of the purpose that the leakproofness of operating handle and filter equipment junction reduces.

In order to achieve the above object, the utility model adopts the following technical scheme:

a portable pneumatic medicine dispensing system comprises an operating handle connected with a gas circuit control unit and a medicine dissolving device detachably inserted on the operating handle, wherein the operating handle comprises a handle body, the gas circuit control unit is connected with an air filter detachably arranged on the handle body through the handle body, and the handle body is detachably connected with a needle cylinder body of the medicine dissolving device through a connector connected with the handle body; the connector comprises a connecting sleeve which is connected with the handle body and is in socket joint with the syringe body, the syringe body is provided with a flange connected with the connecting sleeve, and a limiting tightening mechanism used for tightening the flange is movably constructed on the connecting sleeve.

Furthermore, the air filter comprises a first air passing piece and a second air passing piece which are detachably connected together and form an assembly cavity, the first air passing piece and the second air passing piece are respectively communicated with the outside through a first communication channel and a second communication channel which are arranged on respective bodies, a filtering membrane is movably assembled in the assembly cavity, and a first pressure relief channel and a second pressure relief channel which are used for balancing the pressure of the drug dissolving device are respectively constructed on the end walls of the two air passing pieces which form the assembly cavity; when gas enters the assembly cavity from the first communicating channel, the filtering membrane is attached to the second pressure relief channel and the second communicating channel, and the gas filtered by the filtering membrane enters the drug dissolver through the second communicating channel; when gas enters the assembly cavity from the first communication channel and the pressure in the drug dissolver is smaller than the pressure in the assembly cavity or is vacuum, the filter membrane deforms and is attached to the second communication channel, and meanwhile, the second pressure relief channel communicates the drug dissolver with the assembly cavity; when gas is pumped out of the assembly cavity through the first communicating channel, the filtering membrane is attached to the first pressure relief channel and the first communicating channel, and the gas filtered by the filtering membrane is pumped out of the medicine dissolver through the first communicating channel; when the gas is pumped out of the assembly cavity through the first communication channel and the pressure in the medicine dissolver is greater than the pressure in the assembly cavity; the filtering membrane deforms and is attached to the first communication channel, and meanwhile, the drug dissolving device is communicated with the assembly cavity through the first pressure relief channel.

Further, first communicating channel is close to a plurality of concentric annuluses on the terminal surface of assembly chamber including constructing in first body, just a plurality of annuluses communicate each other and communicate in the adapter tube through a plurality of slots, and the annular outside that just is located the outer lane on first body is constructed with first annular protruding, filtration membrane and the protruding cooperation of first annular and separate annular and assembly chamber.

Furthermore, the second air passing piece comprises a second body with a second connecting part, the second connecting part is connected with the first air passing piece, and a plurality of air holes communicated with the assembling cavity through a second communicating channel are formed in the second body; the second communicating channel comprises a plurality of plate-shaped bodies which are uniformly constructed on the end face of the second body close to one end of the assembly cavity, second annular bulges which surround the plate-shaped bodies and the air holes are constructed on the second body, and the filtering membrane is matched with the second annular bulges and separates the plate-shaped bodies from the assembly cavity.

Furthermore, the one end of cylinder body is sealed and is constructed at this end and has the syringe needle connector, in the other end department of cylinder body is constructed and is followed its radial outside flange that extends, the flange stretches into in the operating handle and fixed with handle body circumference, and the annular sealed recess has been seted up to the one end that keeps away from the syringe needle connector in the flange, the axis coincidence of sealed recess and cylinder body, and sealed recess communicates through the hollow position of location mouth with the cylinder body.

Furthermore, the gas circuit control unit comprises a base body, a first channel and a second channel which are arranged on the base body and are communicated through a first electromagnetic valve, a third channel is communicated with the second channel through a second electromagnetic valve, the third channel is directly or indirectly communicated with the first channel through one or more third electromagnetic valves, and a medium inlet which is communicated with the first channel and is positioned between the first electromagnetic valve and the third electromagnetic valve, a medium outlet which is communicated with the second channel and is positioned between the first electromagnetic valve and the second electromagnetic valve, and a medium return opening which is communicated with the third channel and is positioned between the second electromagnetic valve and the third electromagnetic valve are respectively constructed on the base body.

Furthermore, a fourth channel communicated with the outside is formed on the base body, the number of the third electromagnetic valves is two, namely a third electromagnetic valve A and a third electromagnetic valve B, the third electromagnetic valve A is used for communicating the first channel with the fourth channel, and the third electromagnetic valve B is used for communicating the third channel with the fourth channel.

Furthermore, a fifth channel communicated with the outside is formed on the base body, and the fifth channel is communicated with the second channel through a fourth electromagnetic valve arranged between the fifth channel and the second channel.

Further, the medicine dissolving device comprises a needle cylinder body, a piston body is movably assembled in the needle cylinder body, one end of the needle cylinder body is sealed, a needle head connector is constructed at the end, a flange extending outwards along the radial direction of the needle cylinder body is constructed at the other end of the needle cylinder body, the flange extends into the operating handle and is circumferentially fixed with the operating handle, an annular sealing groove is formed in one end, far away from the needle head connector, of the flange, the sealing groove coincides with the axis of the needle cylinder body, the sealing groove is communicated with the hollow part of the needle cylinder body through a positioning opening, a layer of sealed rubber layer covers the piston body, the peripheral wall of the rubber layer expands tightly on the inner wall of the needle cylinder body, and one end face, far away from the needle cylinder body and the needle head connector, of the rubber layer is separated from the end face corresponding to the piston body.

Furthermore, a recess is formed on the end surface of the piston body, which is separated from the rubber layer, and the recess is positioned in the center of the piston body; or the end surface of the piston body, which is separated from the rubber layer, is a concave arc concave surface, and the lowest part of the arc concave surface is positioned at the center of the piston body; or the piston body is an arc convex surface which is convex downwards on the end face of one end, which is in contact with the liquid medicine in the needle cylinder body, and the highest position of the arc convex surface is positioned at the center of the piston body.

The utility model discloses owing to adopted foretell structure, it compares with prior art, and the technical progress who gains lies in: the utility model discloses the handle body passes through the connector fixed cylinder body, and cylinder body cartridge is in the adapter sleeve to tighten the flange on the cylinder body through spacing tightening mechanism, and operating personnel realizes the fixed or separation of adapter sleeve and cylinder body through controlling spacing tightening mechanism, and then realizes that cylinder body and adapter sleeve are connected more conveniently, adopts flange circumference to seal simultaneously, also can adopt circumference seal and end face seal mutually combined's way, and then improves the leakproofness of connecting; the handle body, the air filter, the connector and the syringe body can be disassembled, so that the assembly and the replacement and maintenance of each part are convenient; to sum up, the utility model discloses a dismouting is convenient, improves operating handle's life simultaneously, and prevents the purpose that the leakproofness of operating handle and filter equipment junction reduces.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.

In the drawings:

FIG. 1 is a schematic structural view of the connection between the operating handle connector and the syringe body according to the embodiment of the present invention;

FIG. 2 is an exploded view of the structure of FIG. 1;

fig. 3 is a schematic structural diagram of an embodiment of the present invention;

fig. 4 is a schematic structural view of the embodiment of the present invention;

FIG. 5 is a schematic structural view of a first air passing member according to an embodiment of the present invention;

fig. 6 is a schematic structural view of the first air passing member at another angle according to the embodiment of the present invention;

fig. 7 is a structural bottom view of the first air passing member according to the embodiment of the present invention;

FIG. 8 is a schematic structural view of a second air passing member according to an embodiment of the present invention;

fig. 9 is a schematic structural view of the second air passing member at another angle according to the embodiment of the present invention;

FIG. 10 is a top view of a second air passage member according to an embodiment of the present invention;

FIG. 11 is a cross-sectional view of an axial configuration of an embodiment of the present invention with a filter membrane removed;

fig. 12 is a sectional view of an axial structure of an embodiment of the present invention;

FIG. 13 is a cross-sectional view of the axial configuration of an embodiment of the present invention as gas normally passes through the filter membrane and into the drug dissolver;

fig. 14 is a cross-sectional view of the axial structure of the embodiment of the present invention in the case of a large pressure difference between the assembly chamber and the drug dissolver when gas enters the assembly chamber;

FIG. 15 is an enlarged view of the structure of portion A in FIG. 14;

FIG. 16 is a cross-sectional view of the axial structure of an embodiment of the present invention during normal gas extraction through the filter membrane from the drug dissolver;

fig. 17 is a sectional view of the axial structure of the embodiment of the present invention in the case of a large pressure difference between the assembly chamber and the drug dissolver when gas is pumped out of the assembly chamber;

FIG. 18 is an enlarged view of the portion B in FIG. 17;

FIG. 19 is a schematic view of the structure of the syringe body according to the embodiment of the present invention;

fig. 20 is a structural sectional view of an embodiment of the present invention;

fig. 21 is a schematic structural diagram of an embodiment of the present invention;

fig. 22 is another schematic structural diagram of the embodiment of the present invention;

FIG. 23 is a schematic structural view of a syringe body according to an embodiment of the present invention;

fig. 24 is a schematic structural view of a sealing member according to an embodiment of the present invention;

figure 25 is a sectional view of the syringe body according to the embodiment of the present invention

Fig. 26 is a schematic structural view of the piston body of the present invention connected to a rubber layer;

fig. 27 is a schematic structural view of another piston body of the present invention connected to a rubber layer;

fig. 28 is a schematic structural view of another piston body of the present invention connected to a rubber layer;

fig. 29 is a schematic structural view of another piston body of the present invention connected to a rubber layer;

fig. 30 is a schematic structural diagram of an embodiment of the present invention;

fig. 31 is a schematic structural view of another embodiment of the present invention;

fig. 32 is a schematic structural view of another embodiment of the present invention;

fig. 33 is a schematic structural diagram of another embodiment of the present invention.

Labeling components: 1-syringe body, 2-needle head connector, 3-flange, 4-annular clamping groove, 5-sealing groove, 6-positioning opening, 7-rubber ring body, 8-sealing protrusion, 9-positioning protrusion, 10-connecting sleeve, 11-control sleeve, 12-limiting bead, 13-abutting part, 14-retainer ring, 15-spring, 16-limiting plate, 17-sealing part, 18-thread sleeve, 19-anti-slip thread, 20-fixing part, 22-slot, 23-assembly part, 24-handle body, 25-air inlet button, 26-air exhaust button, 27-air pipe, 100-first air passing part, 101-first body, 102-first connecting part, 103-joint pipe, 104-air passage, 105-a first annular bulge, 106-a spacer ring, 107-a ring groove, 108-a groove, 109-a reinforcing plate, 200-a second gas passing piece, 201-a second body, 202-a second connecting part, 203-an assembling lug, 204-a second annular bulge, 205-an air hole, 206-a plate-shaped body, 207-an installing groove, 300-an assembling cavity, 400-a filtering membrane, 28-a base body, 29-a first channel, 30-a medium inlet, 31-a second channel, 32-a medium outlet, 33-a third channel, 34-a medium return opening, 35-a first electromagnetic valve, 36-a second electromagnetic valve, 37-a fourth channel, 38-a third electromagnetic valve A, 39-a third electromagnetic valve B, 40-a fifth channel, 41-a fourth electromagnetic valve, 42-mounting hole, 43-third solenoid valve C, 44-piston body, 45-rubber layer, 46-annular bulge, 47-recess and 48-arc concave surface.

Detailed Description

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for purposes of illustration and explanation only and are not intended to limit the invention.

The utility model discloses a pneumatic dispensing system of portable, including gas circuit control unit, operating handle and medicine dissolving device, wherein, operating handle and gas circuit control unit are connected, and the cartridge can be dismantled on operating handle to the medicine dissolving device.

As a preferred embodiment of the present invention, as shown in FIGS. 1-2, the syringe comprises a handle body 24, an air inlet button 25 and an air exhaust button 26 are mounted on the handle body 24, the air inlet button 25 and the air exhaust button 26 are electrically connected to a PLC respectively, an air tube 27 is inserted into one end of the handle body 24, the air tube 27 extends into the handle body 24 and is connected to an air filter mounted at the other end of the handle body 24, the end of the air filter far away from the handle body 24 is detachably connected to a connector, and the handle body 24 is detachably connected to the syringe body 1 via the connector. Specifically, the connector comprises a connecting sleeve 10 connected with the handle body 24 and connected with the syringe body 1 in a socket-and-spigot manner, the syringe body 1 is provided with a flange 3 connected with the connecting sleeve 10, and a limiting tightening mechanism for tightening the flange 3 is movably constructed on the connecting sleeve 10. The utility model discloses a theory of operation and advantage lie in: the utility model discloses handle body 24 passes through connector fixed needle cylinder body 1, and needle cylinder body 1 cartridge is in adapter sleeve 10 to tighten flange 3 on the needle cylinder body 1 through spacing tightening mechanism, and operating personnel realizes the fixed or separation of adapter sleeve 10 and needle cylinder body 1 through controlling spacing tightening mechanism, and then realizes that the connection of needle cylinder body 1 and adapter sleeve 10 is more convenient, adopts flange 3 circumferential seal simultaneously, also can adopt circumferential seal and end face seal mutually combined method, and then improves the leakproofness of connecting; the handle body 24, the air filter, the connector and the syringe body 1 can be disassembled, so that the assembly and the replacement and maintenance of each part are convenient; to sum up, the utility model discloses a dismouting is convenient, improves handle body 24's life simultaneously, and prevents the purpose that the leakproofness of handle body 24 and filter equipment junction reduces.

As a preferred embodiment of the present invention, as shown in fig. 19 to 25, the connecting head comprises the connecting sleeve 10 and the limiting tightening mechanism, the connecting sleeve 10 is connected with the handle body 24 and is socket-connected with the syringe body 1, wherein the syringe body 1 has the flange 3 connected with the connecting sleeve 10, and the limiting tightening mechanism is movably configured on the connecting sleeve 10 and is used for tightening the flange 3, thereby realizing the fixation of the syringe body 1. The working principle and the advantages of the embodiment are as follows: the connecting device is fixed with the handle body 24, the needle cylinder body 1 is inserted into the connecting sleeve 10, the flange 3 on the needle cylinder body 1 is tightened through the limiting tightening mechanism, an operator controls the limiting tightening mechanism to fix or separate the connecting sleeve 10 and the needle cylinder body 1, and then the connection between the needle cylinder body 1 and the connecting sleeve 10 is more convenient, meanwhile, the flange 3 is circumferentially sealed, and a method of mutually combining circumferential sealing and end face sealing can be adopted, so that the connection tightness is improved; to sum up, this embodiment has the characteristics that can quick assembly disassembly dissolves the medicine ware, has improved the leakproofness of dissolving medicine ware and handle body 24 simultaneously.

As a preferred embodiment of the present invention, as shown in fig. 20, the spacing tightening mechanism includes a control sleeve 11 sleeved outside the connecting sleeve 10, assembling holes are uniformly opened on the connecting sleeve 10 along the circumference thereof, spacing beads 12 are respectively assembled in each assembling hole, an abutting portion 13 is constructed on the inner wall of the control sleeve 11, when the abutting portion 13 abuts on each spacing bead 12, the spacing beads 12 protrude out of the inner wall of the connecting sleeve 10 and are clamped in an annular clamping groove 4 opened on the circumferential surface of the flange 3, so as to realize the fixed connection of the syringe body 1. Through the control sleeve 11 of the axial activity along adapter sleeve 10 for control sleeve 11 and spacing pearl 12 butt or separation, and then realize the fixed connection or the connection release to the flange 3 of syringe body 1. In the embodiment, in order to limit the upper and lower sliding limits of the control sleeve 11, a limiting plate 16 extending outwards along the radial direction of the connecting sleeve 10 is configured, and when one end of the control sleeve 11 away from the syringe body 1 abuts on the limiting plate 16, the abutting part 13 is separated from the limitation of the limiting bead 12; a retainer ring 14 is arranged on the outer wall of the connecting sleeve 10 close to one end of the syringe body 1, and when the control sleeve 11 is contacted with the retainer ring 14, the abutting part 13 is abutted against the outer side of the limiting bead 12, so that the limiting bead 12 is clamped in the annular groove of the flange 3. In order to facilitate the return of the control sleeve 11, a boss extending outward in the radial direction is configured on the connecting sleeve 10, a spring 15 is sleeved on the connecting sleeve 10, two ends of the spring 15 are respectively abutted against the boss and the abutting part 13, when the abutting part 13 is abutted against the outer side of the limiting bead 12, the spring 15 is in a compression state or a free state, so that the control sleeve 11 is always kept in a state of being abutted against the retainer ring 14 under the action of non-external force, and the situation that the syringe body 1 is loosened or separated from the connecting sleeve 10 in the using process is avoided. In order to avoid the unstable holding phenomenon of the operator during the process of sliding the control sleeve 11, the present embodiment is configured with a grid-shaped anti-slip pattern 19 on the outer surface of the control sleeve 11.

As a preferred embodiment of the present invention, the connection mode between the syringe body 1 and the present invention is various, and the present embodiment is implemented by enumerating the following modes:

first, as shown in fig. 20, a sealing portion 17 is formed on the inner wall of the connecting sleeve 10 along the radial direction inward thereof, the sealing portion 17 is engaged with the end of the flange 3 of the cylinder body 1, and a sealing member is provided on the surface of the sealing portion 17 sealed with the flange 3 in order to improve sealability.

Secondly, as shown in fig. 2, a fitting 23 for sealing the end of the flange 3 of the cylinder body 1 is engaged with the inside of the connecting sleeve 10, the fitting 23 abuts against the corresponding end of the handle body 24, and a sealing member is fitted between the fitting 23 and the flange 3 of the cylinder body 1.

Thirdly, as shown in fig. 1-2, the connection sleeve 10 is clamped at the corresponding end of the handle body 24, or the connection sleeve 10 is clamped at the air filter detachably connected with the handle body 24, a claw is configured on the connection sleeve 10, and a mounting groove 207 for clamping the claw is configured at the end of the handle body 24 or the air filter. The air filter and the handle body 24 are detachably connected by a screw connection or the like, or the air filter and the handle body 24 are integrally formed.

As a preferred embodiment of the present invention, the connection mode with the handle body 24 of the present invention is multiple, and the following connection mode is preferred: firstly, a thread sleeve 18 is formed at one end of the connecting sleeve 10 far away from the syringe body 1, and the thread sleeve 18 is in threaded connection with the end part of the handle body 24; secondly, at one end of the connecting sleeve 10 far away from the syringe body 1 is a fixing part 20, and the corresponding end of the fixing part 20 and the handle body 24 is constructed into an integrally formed structure.

The utility model also discloses a dispense and use medicine dissolving cylinder, as shown in fig. 5, including cylinder body 1, 1 one end of this cylinder body is sealed, and be constructed with syringe needle connector 2 at this end, a erection joint for the syringe needle, another department at cylinder body 1 is constructed with along its radial outside flange 3 that extends, medical personnel insert handle body 24 with cylinder body 1's flange 3, this flange 3 stretches into in handle body 24 and fixed with 24 circumference joints of handle body, annular sealed recess 5 has been seted up to the one end of keeping away from syringe needle connector 2 at flange 3, this sealed recess 5 and cylinder body 1's axis coincidence, and sealed recess 5 is through the hollow position intercommunication of locating port 6 with cylinder body 1.

As a preferred embodiment of the present invention, in order to facilitate the production, the cost input and the liquid level observation in the syringe body 1, the needle head connector 2 and the flange 3 are made of an integrally formed polyethylene material.

As a preferred embodiment of the present invention, as shown in fig. 5, in order to further limit the axial rotation of the syringe body 1 and the handle body 24 and improve the connection and sealing strength between the syringe body 1 and the handle body 24, the number of the positioning holes 6 is at least two and is uniformly arranged along the circumferential direction of the flange 3.

As a preferred embodiment of the present invention, a ring groove 4 extending radially inward is formed on the circumferential surface of the flange 3, and the flange 3 is connected to the handle body 24 via the ring groove 4. Install foretell connector on the handle body 24, this connector passes through the joint and realizes being connected with cylinder body 1 in ring groove 4, like this because cylinder body 1 is fixed with 24 annular joints of handle body for the joint strength of the two improves, and then improves handle body 24's life, and connects back cylinder body 1 and is bound by the connector and can't take place axial motion, and then has ensured its leakproofness with handle body 24.

The utility model also discloses a special sealing member with dissolve medicine cylinder matched with, as shown in fig. 6-7, including rubber ring body 7, this rubber ring body 7 is fixed on handle body 24, is constructed along its axially extended annular sealed arch 8 in the inboard of rubber ring body 7, and the position department corresponding with location mouth 6 on sealed arch 8 constructs the location arch 9, and when the terminal surface of rubber ring body 7 was hugged closely on the flange 3 terminal surface in the sealed recess 5 outside, sealed arch 8 and location arch 9 inlayed respectively and were established in sealed recess 5 and location mouth 6.

As a preferred embodiment of the present invention, the cross section of the rubber ring body 7 is rectangular, so that the rubber ring body 7 and the end surface of the flange 3 are in surface-to-surface contact, and the sealing performance between the syringe body 1 and the rubber ring body 7 is further improved.

As a preferred embodiment of the present invention, the syringe body 1 is marked with the sub alignment line, and the handle body 24 is provided with the main alignment line, so that when the syringe body 1 is inserted into the handle body 24 and the sub alignment line and the main alignment line are inserted into the main alignment line, the sealing protrusion 8 and the positioning protrusion 9 are respectively inserted into the sealing groove 5 and the positioning hole 6. The problem that medical personnel can not accurately position in the process of inserting the needle cylinder body 1 into the operation joint is avoided, and after the needle cylinder body 1 is inserted into a preset position, the position of the needle cylinder body is the best angle for observing the liquid level of the medical personnel.

In summary, as shown in fig. 7, in the present embodiment, the flange 3 is connected to the handle body 24, so that the strength of the connection between the butterfly wing at the tail end of the existing syringe body 1 and the handle body 24 is increased, and the connection is convenient, and meanwhile, since the syringe body 1 is circumferentially fixed by the flange 3 and the end surface of the flange 3 is used for sealing, the problem of mutual influence between the fixation and the sealing due to the two-in-one function of sealing and connecting the end surface of the existing drug dissolving device is avoided; moreover, due to the arrangement of the sealing groove 5, the positioning opening 6 and a special sealing piece, the sealing between the syringe body 1 and the handle body 24 is changed in a step-type gradient manner, so that the sealing capability is improved and the service life is prolonged; the matching of the positioning opening 6 and the positioning bulge 9 increases the strength of the syringe body 1 and the handle body 24 on one hand, and positions the syringe body 1 on the other hand, so that a nurse can observe scales on the syringe body 1 conveniently, and the syringe body 1 and the handle body 24 are prevented from rotating axially; therefore, the utility model provides a dissolve the inconvenient, the problem that the leakproofness reduces of medicine ware cartridge.

As a preferred embodiment of the present invention, as shown in fig. 3 to 18, the air filter includes a first air passing member 100 and a second air passing member 200, the first air passing member 100 and the second air passing member 200 are detachably connected to each other, an assembly chamber 300 is formed therebetween, the first air passing member 100 and the second air passing member 200 communicate the assembly chamber 300 with the outside through a first communicating channel and a second communicating channel respectively opened on their bodies, a filtering membrane 400 is movably assembled in the assembly chamber 300, and a first pressure releasing channel and a second pressure releasing channel for balancing the pressure of the drug dissolver are respectively constructed on the end walls of the first air passing member 100 and the second air passing member 200 constituting the assembly chamber 300. The first air passing part 100 and the second air passing part 200 are made of metal or plastic materials. The working principle and the advantages of the embodiment are as follows: because the filter membrane 400 of the present embodiment is movably assembled in the assembly chamber 300 formed by the first gas passing piece 100 and the second gas passing piece 200; during the pumping of the liquid medicine, the filtering membrane 400 has four actions: first, as shown in fig. 13, when the liquid medicine in the medicine dissolver is injected into a target medicine bottle or a medicine bag, and the pressure difference between the piston of the medicine dissolver and the pressure in the assembly chamber 300 is small, the filter membrane 400 is attached to the second pressure relief channel and the second communication channel, the gas filtered by the filter membrane 400 enters the medicine dissolver through the second communication channel, and pushes the piston to push out the liquid medicine in the medicine dissolver; secondly, as shown in fig. 16, when gas is pumped out of the assembly cavity 300 through the first communication channel, and the pressure difference between the piston of the drug dissolver and the pressure in the assembly cavity 300 is small, the filter membrane 400 is attached to the first pressure relief channel and the first communication channel, and the gas filtered by the filter membrane 400 is pumped out of the drug dissolver through the first communication channel, so that the piston moves integrally with the pulling force of the gas, and the drug dissolver can further pump the liquid medicine; thirdly, as shown in fig. 14 to 15, when gas enters the assembly chamber 300 through the first communication channel and the pressure in the drug dissolver is lower than the pressure in the assembly chamber 300 or is a vacuum, the filter membrane 400 deforms and adheres to the second communication channel, and the second pressure release channel communicates the drug dissolver with the assembly chamber 300, so that the pressure of the drug dissolver and the pressure in the assembly chamber 300 are balanced or nearly balanced, and then the first action is completed; fourthly, as shown in fig. 17 to 18, when gas is pumped out of the assembly chamber 300 through the first communication channel and the suction force is not balanced with the pressure in the drug dissolver, the filter membrane 400 is deformed and attached to the first communication channel, and the drug dissolver is communicated with the assembly chamber 300 through the first pressure relief channel, so that the pressure of the drug dissolver and the pressure of the assembly chamber 300 are balanced or nearly balanced, and then the second action is completed; in the embodiment, the first gas passing piece 100 and the second gas passing piece 200 are detachably connected, so that the filtering membrane 400 can be conveniently and periodically replaced, and the filtering membrane 400 can be replaced according to the use times, thereby avoiding the problems of resource waste and large cost investment caused by the conventional integral replacement; in conclusion, the problem that the pumping of the liquid medicine cannot be completed due to the fact that the front-back pressure difference of the filtering membrane 400 is large and the piston in the medicine dissolving device cannot be driven to move is solved, and meanwhile the purpose of reducing the investment cost is achieved.

As a preferred embodiment of the present invention, as shown in fig. 5, the first gas passing member 100 includes a first body 101, the first body 101 has a first connecting portion 102 having a cylindrical shape, an external bolt is formed on a circumferential surface of the first connecting portion 102, and the first connecting portion 102 is screwed with the second gas passing member 200, so that the first gas passing member 100 and the second gas passing member 200 are attached and detached and the filtering membrane 400 is replaced. In the present embodiment, the first body 101 is provided with a joint tube 103 communicating with the first communicating channel, the hollow part of the joint tube 103 is an air channel 104, and the joint tube 103 is connected with a gas pipe. In order to reduce the weight of the handle body 24 held by the medical staff and save the material investment, the first body 101 is a shell-shaped structure, a reinforced connecting member is configured between the joint pipe 103 and the shell-shaped structure, the reinforced connecting member comprises a sleeve body configured on the shell structure and used for sleeving the joint pipe 103, and a plurality of reinforcing plates 109 are configured between the sleeve body and the joint pipe 103 for improving the connecting strength of the joint pipe 103.

As a preferred embodiment of the present invention, as shown in fig. 6 to 7, the first communicating channel includes a plurality of concentric ring grooves 107 formed on an end surface of the first body 101 near the assembling chamber 300, and the ring grooves 107 communicate with each other and with the joint pipe 103 via a plurality of grooves 108, a spacer ring 106 is formed between the adjacent ring grooves 107, and each groove 108 communicates the ring groove 107 divided by the spacer ring 106 and is formed to extend radially outward from the center of the first body 101. A first annular projection 105 is configured on the first body 101, outside the annular groove 107 of the outermost ring, and the rim of the filter membrane 400 cooperates with the first annular projection 105 and separates the annular groove 107 from the assembly chamber 300. When gas is pumped out of the assembly cavity 300 through the first communication channel and the suction force is not balanced with the pressure in the drug dissolver, the filter membrane 400 deforms, the situation shown in fig. 17 to 18 can occur, and the situation that the piston cannot move effectively is avoided. The first air passing member 100 of the present embodiment is an integrally formed structure, so that the mass production thereof and the strength of the finished product are effectively ensured.

As a preferred embodiment of the present invention, as shown in fig. 8, the second air passing member 200 includes a second body 201, the second body 201 has a second connecting portion 202, the second body 201 is a sleeve-shaped structure with a radial cross section being circular, one end of the sleeve-shaped structure far away from the first body 101 is closed, and a plurality of air holes 205 are uniformly opened at the one end, the air holes 205 are communicated with the assembly cavity 300 through a second communicating channel, the second connecting portion 202 is an internal thread formed on an inner wall of the sleeve-shaped structure, and the second connecting portion 202 is in threaded connection with the first air passing member 100. The second communicating channel of this embodiment includes a plurality of plate-like bodies 206, the plate-like bodies 206 are uniformly configured on an end surface of the second body 201 near the fitting chamber 300, the second body 201 is configured with a second annular protrusion 204 enclosing both the plate-like body 206 and the air hole 205 therein, and the edge of the filter membrane 400 is engaged with the second annular protrusion 204 and separates the plate-like body 206 from the fitting chamber 300. The second body 201 of the present embodiment is configured with a fitting ear 203, and the first air passing member 100 abuts on the fitting ear 203 through the connection of the second connecting portion 202. When gas enters the assembly cavity 300 through the first communication channel and the pressure in the drug dissolver is smaller than the pressure in the assembly cavity 300 or is vacuum, the situation shown in fig. 14-15 can occur, and the filter membrane 400 deforms, so that the pressure of the drug dissolver and the pressure in the assembly cavity 300 are balanced or nearly balanced, and the situation that the piston cannot effectively move is avoided. The second air passing member 200 of the present embodiment is an integrally formed structure, so as to facilitate mass production thereof and ensure the connection strength with the first air passing member 100. The second body 201 of the present embodiment is configured with a mounting groove 207 at an end portion thereof away from the mounting cavity 300 for mounting a connector of the drug dissolver.

The utility model discloses a medical injector piston, as shown in figure 26, including piston body 44, the outside cladding of piston body 44 has one deck confined rubber layer 45, and the perisporium of this rubber layer 45 expands tightly on the inner wall of cylinder body, and the structure activity assembly that piston body 44 and rubber layer 45 constitute is at the cylinder originally internally, and wherein, the one end terminal surface and the corresponding terminal surface alternate segregation of piston body 44 of cylinder body and syringe needle link are kept away from to rubber layer 45. The utility model discloses a theory of operation and advantage lie in: because the utility model discloses a piston body 44 is by rubber layer 45 cladding, and the rubber layer 45 keeps away from the one end terminal surface of cylinder body and syringe needle link and the corresponding terminal surface alternate segregation of piston body 44, the part of rubber layer 45 and piston body 44 separation is by the pulling under the external pulling force, and then breaks away from the laminating with the corresponding terminal surface of piston body 44, because rubber layer 45 has the elastic deformation ability, this part of rubber layer 45 warp and cooperates the pulling force and drive piston body 44 motion, and then accomplishes the suction of cylinder body to the liquid medicine, can know from this, the utility model provides an in-process of dissolving medicine ware suction or propelling movement liquid medicine, the phenomenon that can't be drawed and pulling appears in the piston, and then makes and dispenses smoothly.

As a preferred embodiment of the present invention, in order to reduce the friction between the peripheral wall of the rubber layer 45 and the inner wall of the cylinder body, a means is employed to reduce the contact area between the two, specifically, a plurality of annular protrusions 46 are integrally formed on the peripheral surface of the rubber layer 45, these annular protrusions 46 are provided at intervals in the axial direction of the piston body 44, and each annular protrusion 46 coincides with the axis of the piston body 44.

As a preferred embodiment of the present invention, the drawing of the rubber layer 45 is performed in order to increase the drawing force, and the middle force concentration of the piston is ensured in the process of pushing the piston body 44, so as to prevent the piston body 44 from shifting in the syringe body. Specifically, two measures are taken, the first is that, as shown in fig. 27, a recess 47 is formed on the end surface of the piston body 44 and the rubber layer 45 which are separated from each other, the recess 47 being located at the center of the piston body 44; secondly, as shown in fig. 28, the end surface of the piston body 44 and the rubber layer 45 which are separated from each other is a concave arc concave surface 48, and the lowest part of the arc concave surface 48 is located at the center of the piston body 44.

As a preferred embodiment of the present invention, in order to avoid that the piston body 44 sticks to the end portion of the syringe body after pushing the liquid medicine in the syringe body completely, and cannot be sucked again, the specific measure is, as shown in fig. 29, that the end surface of the piston body 44 contacting with the liquid medicine in the syringe body is a downward convex arc-shaped convex surface, and the highest point of the arc-shaped convex surface is located at the center of the piston body 44.

As a preferred embodiment of the present invention, as shown in fig. 30-31, the air path control unit includes a base body 28, a first channel 29, a second channel 31 and a third channel 33 which are independent from each other are respectively configured on the base body 28, wherein the first channel 29, the second channel 31 and the third channel 33 are respectively and correspondingly communicated with a medium inlet 30, a medium outlet 32 and a medium return 34 which are configured on the base body 28, a first solenoid valve 35 communicates the first channel 29 with the second channel 31, a second solenoid valve 36 communicates the second channel 31 with the third channel 33, the third channel 33 is directly or indirectly communicated with the first channel 29 through one or more third solenoid valves, the medium inlet 30 is communicated with the first channel 29 between the first solenoid valve 35 and the third solenoid valve, the medium outlet 32 is communicated with the second channel 31 between the first solenoid valve 35 and the second solenoid valve 36, the medium return port 34 communicates with the third passage 33 between the second solenoid valve 36 and the third solenoid valve. The utility model discloses a theory of operation and advantage lie in: when the first electromagnetic valve 35 is opened and other electromagnetic valves are closed, a medium enters from the medium inlet 30 and exits from the medium outlet 32, so that the medicine dissolving device can push liquid medicine; when the second electromagnetic valve 36 is opened and other electromagnetic valves are closed, the medium is sucked from the medium outlet 32 and is discharged from the medium return port 34, so that the medicine dissolving device can suck the liquid medicine; when the third electromagnetic valve is opened and other electromagnetic valves are closed, the medium enters from the medium inlet 30 and exits from the medium return port 34, so that the medium keeps a circulating state when the medicine dissolver does not work; the utility model discloses a three channels and three solenoid valves at least realize dissolving the medicine ware and to the pump sending of liquid medicine, and dissolve the medicine ware and be in the purpose that keeps the medium in a circulation circuit under the out-of-operation condition, effectively reduce the arrangement of the electrical component on the controller like this, improved the stability of whole equipment operation in-process, the while production degree of difficulty greatly reduced, the quantity of solenoid valve is effectively reduced, the input cost reduction.

As a preferred embodiment of the present invention, as shown in fig. 30, the third channel 33 on the base body 28 is directly communicated with the first channel 29 through a third electromagnetic valve, which is a third electromagnetic valve C43, so that the structure is simple and compact, and the control is convenient and stable.

As a preferred embodiment of the present invention, as shown in fig. 31, on the basis of the first channel 29, the second channel 31 and the third channel 33, a fourth channel 37 communicating with the outside is further configured on the base body 28, and two third electromagnetic valves, namely, a third electromagnetic valve a38 and a third electromagnetic valve B39, are provided, wherein the third electromagnetic valve a38 communicates the first channel 29 with the fourth channel 37, and the third electromagnetic valve B39 communicates the third channel 33 with the fourth channel 37. When the medicine dissolver needs to suck liquid medicine, the third electromagnetic valve A38 and the second electromagnetic valve 36 are controlled to be opened, other electromagnetic valves are controlled to be closed, medium enters the outside from the medium inlet 30 through the fourth channel 37, the damage of the power source caused by overhigh outlet pressure of the power source is prevented, and the medicine dissolver sucks the liquid medicine along with the suction of the power source; when needs carry out dissolving medicine ware propelling movement liquid medicine, control third solenoid valve B39, first solenoid valve 35 are opened, and other solenoid valves are closed, and external medium returns 34 by the medium and returns to the power supply for prevent that the return pressure of power supply from forming the vacuum and causing the damage of power supply, the power supply carries the medium by medium import 30 to dissolving the medicine ware, and then realizes the propelling movement of the liquid medicine in the dissolving medicine ware. When the power source is still in operation in a stopped state, the third solenoid valve a38 and the third solenoid valve B39, and the other solenoid valves are closed, and the medium passes through the medium inlet 30, the medium return port 34, and the power source to form a circulation loop, and the circulation loop can be balanced by communication with the outside through the fourth passage 37 according to the loss or surplus of the medium.

As a preferred embodiment of the present invention, as shown in fig. 32 and 33, in the embodiments shown in fig. 31 and 32, a fifth passage 40 is provided, and the fifth passage 40 is formed on the base body 28 and communicates with the outside, and the fifth passage 40 and the second passage 31 communicate with each other via a fourth solenoid valve 41 installed therebetween. When the suction or pushing action is completed, the fourth electromagnetic valve 41 is controlled to be opened for a short time and then closed, so that the pressure of the medicine dissolving device is released, and the next suction or pushing action is influenced under the condition of unbalanced pressure after certain pressure is kept in the medicine dissolving device.

In a preferred embodiment of the present invention, the base body 28 is provided with a plurality of mounting holes 42, and the base body 28 is fixed to the target object by bolts engaged with the mounting holes 42. In order to enhance the strength of the base body 28 and reduce the manufacturing difficulty, the base body 28 is a metal product formed integrally.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the protection of the claims of the present invention.

Claims (10)

1. The utility model provides a pneumatic dispensing system of portable which characterized in that: the automatic medicine dissolving device comprises an operating handle connected with an air path control unit and a medicine dissolving device detachably inserted on the operating handle, wherein the operating handle comprises a handle body, the air path control unit is connected with an air filter detachably arranged on the handle body through the handle body, and the handle body is detachably connected with a needle cylinder body of the medicine dissolving device through a connector connected with the handle body; the connector comprises a connecting sleeve which is connected with the handle body and is in socket joint with the syringe body, the syringe body is provided with a flange connected with the connecting sleeve, and a limiting tightening mechanism used for tightening the flange is movably constructed on the connecting sleeve.

2. The portable pneumatic dispensing system of claim 1, wherein: the air filter comprises a first air passing piece and a second air passing piece which are detachably connected together and form an assembly cavity, the first air passing piece and the second air passing piece are respectively communicated with the outside through a first communication channel and a second communication channel which are arranged on respective bodies, a filtering membrane is movably assembled in the assembly cavity, and a first pressure relief channel and a second pressure relief channel which are used for balancing the pressure of the drug dissolving device are respectively formed on the end walls of the first air passing piece and the second air passing piece which form the assembly cavity; when gas enters the assembly cavity from the first communicating channel, the filtering membrane is attached to the second pressure relief channel and the second communicating channel, and the gas filtered by the filtering membrane enters the drug dissolver through the second communicating channel; when gas enters the assembly cavity from the first communication channel and the pressure in the drug dissolver is smaller than the pressure in the assembly cavity or is vacuum, the filter membrane deforms and is attached to the second communication channel, and meanwhile, the second pressure relief channel communicates the drug dissolver with the assembly cavity; when gas is pumped out of the assembly cavity through the first communicating channel, the filtering membrane is attached to the first pressure relief channel and the first communicating channel, and the gas filtered by the filtering membrane is pumped out of the medicine dissolver through the first communicating channel; when the gas is pumped out of the assembly cavity through the first communication channel and the pressure in the medicine dissolver is greater than the pressure in the assembly cavity; the filtering membrane deforms and is attached to the first communication channel, and meanwhile, the drug dissolving device is communicated with the assembly cavity through the first pressure relief channel.

3. A portable pneumatic dispensing system according to claim 2, wherein: first communicating channel is close to a plurality of endocentric annuluses on the terminal surface of assembly chamber including constructing in first body, just a plurality of annuluses communicate each other and communicate in the adapter tube through a plurality of slots, and the annular outside that just is located the outer lane on first body is constructed with first annular arch, filtration membrane and the protruding cooperation of first annular and separate annular and assembly chamber.

4. A portable pneumatic dispensing system according to claim 2, wherein: the second air passing piece comprises a second body with a second connecting part, the second connecting part is connected with the first air passing piece, and a plurality of air holes communicated with the assembling cavity through a second communicating channel are formed in the second body; the second communicating channel comprises a plurality of plate-shaped bodies which are uniformly constructed on the end face of the second body close to one end of the assembly cavity, second annular bulges which surround the plate-shaped bodies and the air holes are constructed on the second body, and the filtering membrane is matched with the second annular bulges and separates the plate-shaped bodies from the assembly cavity.

5. The portable pneumatic dispensing system of claim 1, wherein: the syringe comprises a syringe body, a handle body, a needle head connector, a flange and a sealing groove, wherein one end of the syringe body is closed and is constructed with the needle head connector at the end, the other end of the syringe body is constructed with the flange which extends outwards along the radial direction of the syringe body, the flange extends into the operating handle and is fixed with the handle body in the circumferential direction, one end of the flange, which is far away from the needle head connector, is provided with the annular sealing groove, the sealing groove is superposed with the axis of the syringe body, and the sealing groove is communicated with the hollow part of the syringe body through a positioning port.

6. The portable pneumatic dispensing system of claim 1, wherein: the gas circuit control unit comprises a base body, a first channel and a second channel which are arranged on the base body and are communicated through a first electromagnetic valve, a third channel is communicated with the second channel through a second electromagnetic valve, the third channel is directly or indirectly communicated with the first channel through one or more third electromagnetic valves, and a medium inlet which is communicated with the first channel and is positioned between the first electromagnetic valve and the third electromagnetic valve, a medium outlet which is communicated with the second channel and is positioned between the first electromagnetic valve and the second electromagnetic valve, and a medium return opening which is communicated with the third channel and is positioned between the second electromagnetic valve and the third electromagnetic valve are respectively constructed on the base body.

7. The portable pneumatic dispensing system of claim 6, wherein: and a fourth channel communicated with the outside is formed on the base body, the number of the third electromagnetic valves is two, namely a third electromagnetic valve A and a third electromagnetic valve B, the third electromagnetic valve A is used for communicating the first channel with the fourth channel, and the third electromagnetic valve B is used for communicating the third channel with the fourth channel.

8. A portable pneumatic dispensing system according to claim 6 or 7, wherein: and a fifth channel communicated with the outside is formed on the base body, and the fifth channel is communicated with the second channel through a fourth electromagnetic valve arranged between the fifth channel and the second channel.

9. The portable pneumatic dispensing system of claim 1, wherein: the medicine dissolving device comprises a needle cylinder body, a piston body is movably assembled in the needle cylinder body, one end of the needle cylinder body is sealed and is constructed with a needle head connector at the end, the other end of the needle cylinder body is constructed with a flange which extends along the radial direction outwards, the flange extends into the operating handle and is fixed with the operating handle in the circumferential direction, one end of the flange far away from the needle head connector is provided with an annular sealing groove, the sealing groove is coincided with the axis of the needle cylinder body, the sealing groove is communicated with the hollow part of the needle cylinder body through a positioning port, the piston body is externally coated with a layer of sealed rubber layer, the peripheral wall of the rubber layer is tightly expanded on the inner wall of the needle cylinder body, and one end face of the rubber layer far away from the needle cylinder body and the needle head connector is separated from the end face corresponding to the piston body.

10. A portable pneumatic dispensing system according to claim 9, wherein: a recess is formed on the end surface of the piston body, which is separated from the rubber layer, and the recess is positioned in the center of the piston body; or the end surface of the piston body, which is separated from the rubber layer, is a concave arc concave surface, and the lowest part of the arc concave surface is positioned at the center of the piston body; or the piston body is an arc convex surface which is convex downwards on the end face of one end, which is in contact with the liquid medicine in the needle cylinder body, and the highest position of the arc convex surface is positioned at the center of the piston body.

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