CN109568130B - Power-assisted medicine dispensing device - Google Patents
Power-assisted medicine dispensing device Download PDFInfo
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- CN109568130B CN109568130B CN201811513124.4A CN201811513124A CN109568130B CN 109568130 B CN109568130 B CN 109568130B CN 201811513124 A CN201811513124 A CN 201811513124A CN 109568130 B CN109568130 B CN 109568130B
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- pressure generator
- medicine
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- switching device
- pipeline
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
- A61J1/14—Details; Accessories therefor
- A61J1/20—Arrangements for transferring or mixing fluids, e.g. from vial to syringe
- A61J1/2003—Accessories used in combination with means for transfer or mixing of fluids, e.g. for activating fluid flow, separating fluids, filtering fluid or venting
- A61J1/2048—Connecting means
- A61J1/2051—Connecting means having tap means, e.g. tap means activated by sliding
Abstract
The invention relates to the technical field of medicine preparation tools, in particular to a power-assisted medicine preparation device. The device comprises a medicine storage barrel and a delivery pipe arranged at the front end of the medicine storage barrel, wherein an air bag communicated with the delivery pipe is arranged in an inner cavity of the medicine storage barrel; the rear end of the medicine storage cylinder is fixedly connected with a piston cylinder, a piston is installed in the piston cylinder in a sliding mode, and the rear end of the piston cylinder is provided with a pipeline switching device connected with a pressure generator. The medicine dispenser adopts the pressure generator to assist in exerting force, can suck or push out the medicine storage barrel with the liquid medicine as long as the gland is pressed, completes the medicine dispensing operation, has reasonable structure and convenient and light use, and is beneficial to reducing the labor intensity of medicine dispensing, improving the labor efficiency of personnel and reducing the dosage error of the medicine. In addition, the medicine is in a totally-enclosed air bag in the processes of inhalation and pushing, so that the medicine leakage caused by the abrasion of the piston is avoided, the environmental pollution is favorably reduced, and the body health of workers is protected.
Description
Technical Field
The invention relates to the technical field of medicine preparation tools, in particular to a power-assisted medicine preparation device.
Background
When a worker prepares the medicine, the injector needs to be repeatedly pushed and pulled to suck the liquid medicine, the quantity of the medicine prepared by a dispensing center serving as a professional medical structure every day is very large, and the pushing and pulling of the injector consumes very large physical force of the worker. In addition, the common injector is adopted to prepare the medicine, the medicine quantity sucked and injected by the injector is completely controlled by an operator, the attention and judgment capability of a person are reduced under the condition of long-time work fatigue, the dosage is easy to be mistaken, and the dosage is wrong. In addition, the syringe rear end of ordinary syringe that dispenses is open, relies on the peripheral sealing washer of piston in the syringe to play sealed effect during dispensing, nevertheless because the during operation sealing washer is sliding fit with the syringe inner wall, has a small amount of liquid medicine adhesion on the syringe inner wall when pushing the medicine inevitably, causes the medicine to reveal, and along with the increase of live time, the phenomenon that the medicine was revealed after the sealing washer wearing and tearing is more serious. The leakage of the medicine can not only cause metering errors, but also pollute the air quality of a workplace and threaten the physical health of workers.
Disclosure of Invention
The invention aims to provide a boosting type medicine dispenser which is reasonable in structure, convenient and light to use and capable of reducing the medicine dispensing labor intensity, improving the labor efficiency of personnel and reducing the medicine dosage errors.
The technical scheme adopted by the invention for solving the technical problem is as follows:
the invention relates to a booster-type medicine dispenser, which comprises a medicine storage barrel and a delivery pipe arranged at the front end of the medicine storage barrel, wherein the side wall of the medicine storage barrel is provided with a breathing hole, and an air bag communicated with the delivery pipe is arranged in an inner cavity of the medicine storage barrel; the rear end of the drug storage cylinder is fixedly connected with a piston cylinder, the piston cylinder and the drug storage cylinder are coaxially arranged, a piston is slidably mounted in the piston cylinder, a telescopic rod is mounted in the piston cylinder, the front end of the telescopic rod penetrates through a front end cover of the piston cylinder and is fixedly connected to the rear end of the air bag, and the rear end of the telescopic rod is fixedly connected to the piston; the front end of the piston cylinder is provided with a front channel port communicated with an inner cavity of the piston cylinder, the rear end of the piston cylinder is provided with a rear channel port communicated with the inner cavity of the piston cylinder, the front channel port is connected with the pressure generator through a front pipeline switching device, and the rear channel port is connected with the pressure generator through a rear pipeline switching device.
The front pipeline switching device and the rear pipeline switching device both comprise a valve cavity of a columnar structure and a plunger piston which is slidably arranged in an inner cavity of the valve cavity and is in piston fit with the inner wall of the valve cavity, the front end of the valve cavity is provided with an input and output port communicated with the inner cavity of the valve cavity, the side wall of the valve cavity is provided with a first pressure generator interface and a second pressure generator interface communicated with the inner cavity of the valve cavity, the distance between the first pressure generator interface and the second pressure generator interface in the axial direction of the valve cavity is greater than the length of the plunger piston, the plunger piston is provided with a through hole communicated with the rear end face of the plunger piston from the front end face of the plunger piston, and the rear end of the plunger piston is; the input/output port of the front pipeline switching device is communicated with the front channel port through a pipeline, the first interface of the pressure generator of the front pipeline switching device is communicated with the medium output end of the pressure generator through a pipeline, and the second interface of the pressure generator is communicated with the medium return end of the pressure generator through a pipeline; the input and output port of the rear pipeline switching device is communicated with the rear channel port through a pipeline, the first interface of the pressure generator of the rear pipeline switching device is communicated with the medium reflux end of the pressure generator through a pipeline, and the second interface of the pressure generator is communicated with the medium output end of the pressure generator through a pipeline.
The front pipeline switching device and the rear pipeline switching device both comprise a valve cavity with a columnar structure and a valve rod which is slidably arranged in an inner cavity of the valve cavity, a valve plate is fixedly arranged on the valve rod, an input/output port, a first interface and a second interface of the pressure generator which are communicated with the inner cavity of the valve cavity are arranged on the side wall of the valve cavity, the distance between the first interface and the second interface of the pressure generator in the axial direction of the valve cavity is larger than the thickness of the valve plate, the input/output port is located between the first interface and the second interface of the pressure generator, the inner wall of the valve cavity is provided with a front valve plate seat and a rear valve plate seat which are matched with the valve plates, the front valve plate seat and the rear valve plate seat are both in a convex ring structure, and the front valve plate seat and the rear valve plate seat are both positioned between the first interface and the second interface of the pressure generator and are respectively arranged at two sides of the input/output port; the valve rod extends to the outside of the valve cavity and is fixedly connected with the gland; the input/output port of the front pipeline switching device is communicated with the front channel port through a pipeline, the first interface of the pressure generator of the front pipeline switching device is communicated with the medium output end of the pressure generator through a pipeline, and the second interface of the pressure generator is communicated with the medium return end of the pressure generator through a pipeline; the input and output port of the rear pipeline switching device is communicated with the rear channel port through a pipeline, the first interface of the pressure generator of the rear pipeline switching device is communicated with the medium reflux end of the pressure generator through a pipeline, and the second interface of the pressure generator is communicated with the medium output end of the pressure generator through a pipeline.
The pressure generator is a hydraulic pump or an air pump.
Due to the adoption of the structure, the medicine dispenser adopts the pressure generator for assisting force, the staff can suck or push the liquid medicine into the medicine storage barrel or out the medicine storage barrel only by pressing the gland to complete the medicine dispensing operation, the medicine dispenser is reasonable in structure and convenient and light to use, and is beneficial to reducing the labor intensity of medicine dispensing, improving the labor efficiency of staff and reducing the dosage errors. In addition, the medicine is in a totally-enclosed air bag in the processes of inhalation and pushing, so that the medicine leakage caused by the abrasion of the piston is avoided, the environmental pollution is favorably reduced, and the body health of workers is protected.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is an enlarged schematic structural diagram of the pipeline switching device in the embodiment of fig. 1.
Fig. 3 is a schematic structural diagram of the pipe switching device in the embodiment of fig. 2 when the plunger moves to the front dead center.
Fig. 4 is a schematic structural diagram of another embodiment of the present invention.
Fig. 5 is an enlarged schematic structural diagram of the pipeline switching device in the embodiment of fig. 4.
Detailed Description
As shown in fig. 1, the booster-type medicine dispenser of the present invention includes a medicine storage cartridge 1 and a delivery tube 2 installed at the front end of the medicine storage cartridge 1, wherein the side wall of the medicine storage cartridge 1 is provided with a breathing hole to keep the balance of internal and external pressure, and the delivery tube 2 may be an injection needle or a thin tube with other forms for convenient operation. An air bag 3 communicated with the delivery pipe 2 is arranged in the inner cavity of the storage cylinder 1, the air bag 3 is a cylindrical body made of soft, bendable and compressible silica gel, rubber and other materials, can be compressed or extended under stress, and is convenient to connect with the delivery pipe 2, the front end of the air bag 3 is fixedly connected to a front end cover 31, the front end cover 31 is made of hard materials such as plastics, stainless steel and the like, the front end cover 31 is clamped at the front end of the storage cylinder 1, the front end cover 31 is provided with a mounting hole for communicating with the delivery pipe 2, and the delivery pipe 2 is arranged on the mounting hole of the front end cover 31, so that the delivery pipe 2 is communicated with the inner cavity of the air bag; the rear end of the medicine storage barrel 1 is fixedly connected with a piston cylinder 5, the piston cylinder 5 and the medicine storage barrel 1 are coaxially arranged, the outer diameters of the piston cylinder 5 and the medicine storage barrel 1 are preferably equal, so that the piston cylinder 5 and the medicine storage barrel 1 can be conveniently held by hands, and the piston cylinder 5 and the medicine storage barrel 1 can adopt an integrated structure as shown in figure 1, namely, a front end cover of the piston cylinder 5 and a rear end cover of the medicine storage barrel 1 are fused into a whole; or a split structure fixedly connected together can be adopted, and the front end cover of the piston cylinder 5 and the rear end of the medicine storage cylinder 1 are fixedly connected together in a welding, bonding or bolt connection mode. A piston 6 is slidably arranged in the piston cylinder 5, and the piston 6 is in airtight fit with the inner wall of the piston cylinder 5, so that a medium in front of the piston 6 in motion can be compressed when the piston moves in the piston cylinder 5 along the axial direction, and the function of the piston is realized. The telescopic link 4 is installed in piston cylinder 5, the front end of telescopic link 4 passes front end housing 51 fixed connection of piston cylinder 5 in the rear end of gasbag 3, be provided with the sealing washer between telescopic link 4 and the front end housing 51, it is sealed with the medium in the piston cylinder 5 when guaranteeing that telescopic link 4 normally slides, avoid the medium to reveal, in addition, for conveniently connecting gasbag 3, as shown in figure 1, at the rear end fixedly connected with of gasbag 3 connecting plate 32 of the stereoplasm that materials such as plastics, stainless steel made, telescopic link 4 and connecting plate 32 fixed connection. Rear end fixed connection of telescopic link 4 is on piston 6, can promote connecting plate 32 axial displacement in storage cartridge case 1 through telescopic link 4 when piston 6 axial displacement to compression or tensile gasbag 3, and then through conveyer pipe 2 propelling movement or absorb the medicine.
The front end of the piston cylinder 5 is provided with a front channel port 52 communicated with an inner cavity of the piston cylinder, the rear end of the piston cylinder 5 is provided with a rear channel port 53 communicated with the inner cavity of the piston cylinder, the front channel port 52 is arranged in front of a front dead center of a motion track of the piston 6, and the rear channel port 53 is arranged behind a rear dead center of the motion track of the piston 6, so that media such as compressed air, hydraulic oil, distilled water and the like injected from the front channel port 52 can push the piston 6 to move backwards, and conversely, the media injected from the rear channel port 53 can push the piston 6 to move forwards. The front passage port 52 is connected to the pressure generator via a front line switching device 7, and the rear passage port 53 is connected to the pressure generator via a rear line switching device 8. The pressure generator is a hydraulic or air pump. The hydraulic pump uses water or hydraulic oil as a medium, the air pump uses compressed air as a working medium, and corresponding pipeline connections are switched through the front pipeline switching device 7 and the rear pipeline switching device 8, so that the piston 6 is pushed to move forwards or backwards. When the piston 6 moves forwards, the air bag 3 is compressed through the telescopic rod 4, and the liquid medicine in the air bag 3 can be pushed out; when the piston 6 moves backwards, the telescopic rod 4 stretches the air bag 3, negative pressure is formed in the air bag 3, and liquid medicine can be sucked through the conveying pipe 2.
The pipeline switching device can have at least two structures. As shown in fig. 1 and 2, as a first embodiment of the present invention, the front pipeline switching device 7 and the rear pipeline switching device 8 have the same structure, and each include a valve cavity 81 having a cylindrical structure, and a plunger 85 slidably mounted in an inner cavity of the valve cavity 81 and in piston fit with an inner wall of the valve cavity 81, the inner cavity of the valve cavity 81 has a cylindrical structure or a polygonal prism structure, and an outer profile of a cross section of the plunger 85 matches with a cross section of the valve cavity 81, so that the plunger 85 can axially move in the valve cavity 81 while maintaining a good seal with the inner wall of the valve cavity 81. In addition, in order to maintain the plunger 85 in good sealing contact with the inner wall of the valve chamber 81, the outer circumferential surface of the plunger 85 is provided with an annular sealing ring groove in which a sealing ring 88 is fitted.
The front end of the valve cavity 81 is provided with an input/output port 82 communicated with the inner cavity of the valve cavity, as shown in fig. 2, as a preferred scheme, the front end of the valve cavity 81 is of a conical structure, the front end of the plunger 85 is a frustum body matched with the front end of the plunger, and the input/output port 82 is arranged on the conical top of the front end of the valve cavity 81 and is overlapped with the axis of the valve cavity 81; when the plunger 85 moves forward to the front stop point, the cone on the plunger 85 is just embedded into the cone structure at the front end of the valve cavity 81, so as to play a role of automatically adjusting the axis, ensure that the axis of the plunger 85 is always overlapped with the axis of the valve cavity 81, and prevent the axis of the plunger 85 from deviating.
The side wall of the valve chamber 81 is provided with a first interface 83 and a second interface 84 of the pressure generator which are communicated with the inner cavity of the valve chamber 81, and the distance between the first interface 83 of the pressure generator and the second interface 84 of the pressure generator in the axial direction of the valve chamber 81 is larger than the length of the plunger 85, so that only one of the interfaces can be blocked when the plunger 85 is positioned at the front dead center or the rear dead center respectively. As shown in fig. 2, when the plunger 85 is at the rear dead center, the side wall of the plunger 85 just blocks the pressure generator second port 84, and the pressure generator first port 83 is opened and communicated with the input/output port 82 through the front end inner cavity of the valve cavity 81; conversely, as shown in fig. 3, when the plunger 85 moves to the front dead center, the side wall of the plunger 85 just blocks the first interface 83 of the pressure generator, and the second interface 84 of the pressure generator is opened and communicated with the rear end inner cavity of the valve chamber 81.
The plunger 85 is provided with a through hole 86 communicated from the front end surface to the rear end surface thereof, as shown in fig. 2 and 3, preferably, the front end and the rear end of the plunger 85 are symmetrical frustum bodies, and the front end opening of the through hole 86 is positioned at the center of the frustum body and the axis of the plunger 85 so as to be convenient for butt joint with the input/output port 82; the front end opening of the through hole 86 is located on the conical surface of the rear-end frustum body, avoiding the center of the rear-end frustum body. The rear end of the plunger 85 is fixedly connected with a pressure lever 87, the pressure lever 87 extends to the outside of the valve cavity 81 and is fixedly connected with the gland 9, in order to facilitate the return of the gland 9, a spring 10 can be arranged on the inner side of the gland 9, the spring 10 is a spiral spring, and two ends of the spring 10 respectively abut against the inner side of the gland 9 and the outer side wall of the valve cavity 81, so that the gland 9 is kept away from the valve cavity 81, the plunger 85 is driven to be located at a rear dead center position, when a worker presses the gland 9, the pressure of the spring 10 can be overcome, and the plunger 85 is pushed to move forwards through the pressure lever 87 until the; as mentioned above, when the plunger 85 moves to the front dead center, the side wall of the plunger 85 just blocks the pressure generator first port 83, and the pressure generator second port 84 is opened and communicated with the rear end inner cavity of the valve chamber 81; at the same time, the front end opening of the through hole 86 at the front end of the plunger 85 is just butted against the input/output port 82, and the rear end opening of the through hole 86 is located in the rear end inner cavity of the valve chamber 81, so that the pressure generator second port 84 can be communicated with the input/output port 82 through the through hole 86.
As shown in fig. 1, the input/output port 82 of the front channel switching device 7 communicates with the front channel port 52 via a pipeline, which may be a channel provided in the side wall of the piston cylinder 5 as shown in fig. 1, or a pipeline connected between the input/output port 82 and the front channel port 52. The first pressure generator port 83 of the front line switching device 7 communicates via a line with the medium outlet 11 of the pressure generator, and the second pressure generator port 84 communicates via a line with the medium return 12 of the pressure generator, wherein the line can be a line connected between the two or a channel provided in the component. When a hydraulic pump is used as the pressure generator, the medium output end 11 is connected with the output end of the hydraulic pump, and the medium return end 12 is connected with the oil return port of the hydraulic pump; when an air pump is used as the pressure generator, the medium output end 11 is connected with the output end of the air pump, and the medium return end 12 is communicated with the atmosphere.
The input/output 82 of the rear pipe switching device 8 is connected to the rear channel 53 via a pipe, the first pressure generator port 83 of the rear pipe switching device 8 is connected to the medium return port 12 of the pressure generator via a pipe, and the second pressure generator port 84 is connected to the medium output port 11 of the pressure generator via a pipe.
As shown in fig. 1, 2 and 3, when the plungers 85 in the front pipeline switching device 7 and the rear pipeline switching device 8 are located at the rear dead center, the plunger 85 in the front pipeline switching device 7 closes the pressure generator second port 84 connected to the medium return end 12, which corresponds to closing the passage between the front pipeline switching device 7 and the medium return end 12, the medium output end 11 is connected to the input/output port 82 of the front pipeline switching device 7 through the pressure generator first port 83 of the front pipeline switching device 7 and the front end of the inner cavity of the valve cavity 81 of the front pipeline switching device 7, which are connected to the medium output end 11, and further connected to the front passage port 52, and the medium output by the pressure generator such as the hydraulic pump is injected into the front end of the piston cylinder 5 through the front pipeline switching device 7, pushing the piston 6 to move backwards, thereby stretching the air bag 3. Meanwhile, the plunger 85 in the rear pipe switching device 8 closes the second interface 84 of the pressure generator connected to the medium output end 11, which is equivalent to closing the passage between the rear pipe switching device 8 and the medium output end 11, and the medium return end 12 is connected to the input/output port 82 of the rear pipe switching device 8 through the first interface 83 of the pressure generator of the rear pipe switching device 8 and the front end of the inner cavity of the valve cavity 81 of the rear pipe switching device 8, so that the medium behind the piston 6 can be smoothly guided into the medium return end 12 through the input/output port 82 of the rear pipe switching device 8 when the piston 6 moves backwards, and finally flows back to the medium storage tank of the hydraulic pump, or can be directly discharged to the atmosphere when an air pump is used.
In this operating state, the piston 6 moves backward up to the rear dead center position and stretches the balloon 3 to the maximum, at which time the liquid medicine can be sucked into the balloon 3 from the delivery tube 2 if inserted into the medicine bottle.
When the air bag 3 needs to be pushed out after being filled with the liquid medicine, the pressing cover 9 is pressed, and the plunger 85 is pushed forward by the pressing rod 87 until the plunger 85 moves to the front dead center position shown in fig. 3. At this time, the through hole 86 of the plunger 85 in the front pipe switching device 7 is butted with the input/output port 82 of the front pipe switching device 7, and the through hole 86 of the plunger 85 in the rear pipe switching device 8 is butted with the input/output port 82 of the rear pipe switching device 8. The plunger 85 in the front pipeline switching device 7 closes the first interface 83 of the pressure generator communicating with the medium output end 11, which is equivalent to closing the passage between the front pipeline switching device 7 and the medium output end 11, and the medium return end 12 communicates with the input/output port 82 of the front pipeline switching device 7 through the second interface 84 of the pressure generator of the front pipeline switching device 7, the rear end of the inner cavity of the valve cavity 81 of the front pipeline switching device 7 and the through hole 86 on the plunger 85, so that the medium in front of the piston 6 can be smoothly introduced into the medium return end 12 through the front passage port 52 and the front pipeline switching device 7; meanwhile, the plunger 85 in the rear pipeline switching device 8 closes the first interface 83 of the pressure generator communicated with the medium return end 12, which corresponds to closing the passage between the rear pipeline switching device 8 and the medium return end 12, and the medium output end 11 is communicated with the input/output port 82 of the rear pipeline switching device 8 through the second interface 84 of the pressure generator of the rear pipeline switching device 8, the rear end of the inner cavity of the valve cavity 81 of the rear pipeline switching device 8 and the through hole 86 of the plunger 85, so that the medium output by the pressure generator in the hydraulic pump can be injected into the rear end of the piston cylinder 5 through the rear pipeline switching device 8 to push the piston 6 to move forward, thereby realizing the action of compressing the air bag 3.
In this operating state, the piston 6 moves forward up to the front dead center position and compresses the balloon 3 to the minimum, at which time if the balloon 3 is filled with a medical fluid, the medical fluid can be injected into another container for dispensing the drug.
As shown in fig. 4 and 5, as another embodiment of the present invention. Preceding pipeline auto-change over device 7 and back pipeline auto-change over device 8 all include columnar structure's valve pocket 81, the valve stem 96 of slidable mounting in the inner chamber of valve pocket 81, fixed mounting has valve block 97 on the valve stem 96, be provided with input output 82, the first interface 83 of pressure generator and the pressure generator second interface 84 of intercommunication its inner chamber on the valve pocket 81 lateral wall, the distance of the first interface 83 of pressure generator and pressure generator second interface 84 in valve pocket 81 axis direction is greater than the thickness of valve block 97 to valve block 97 can have certain clearance between the first interface 83 of pressure generator and pressure generator second interface 84. The input/output port 82 is located between the first interface 83 and the second interface 84 of the pressure generator, a front valve seat 98 and a rear valve seat 99 which are matched with the valve plate 97 are arranged on the inner wall of the valve cavity 81, the front valve seat 98 and the rear valve seat 99 are both in a convex ring structure, and the diameter of the inner ring of the front valve seat 98 and the diameter of the inner ring of the rear valve seat 99 are smaller than that of the valve plate 97, so that the inner cavity of the front valve seat 98 or the rear valve seat 99 can be blocked when the valve plate 97 covers the same. The front valve plate seat 98 and the rear valve plate seat 99 are located between the pressure generator first interface 83 and the pressure generator second interface 84 and are respectively arranged at two sides of the input/output port 82, when the valve plate 97 moves backwards to cover the rear valve plate seat 99 as shown in fig. 5, the inner cavity of the rear valve plate seat 99 can be blocked, the channel between the pressure generator second interface 84 and the input/output port 82 is closed, and the pressure generator first interface 83 is communicated with the input/output port 82; conversely, when the valve plate 97 moves forward to cover the front valve plate seat 98, the inner cavity of the front valve plate seat 98 can be blocked and the passage between the pressure generator first port 83 and the input/output port 82 is closed, and the pressure generator second port 84 is communicated with the input/output port 82.
The valve rod 96 extends to the outside of the valve cavity 81 and is fixedly connected with the gland 9; the input/output port 82 of the front pipeline switching device 7 is communicated with the front channel port 52 through a pipeline, the pressure generator first interface 83 of the front pipeline switching device 7 is communicated with the medium output port 11 of the pressure generator through a pipeline, and the pressure generator second interface 84 is communicated with the medium return port 12 of the pressure generator through a pipeline; the input/output 82 of the rear pipe switching device 8 is connected to the rear channel 53 via a pipe, the first pressure generator port 83 of the rear pipe switching device 8 is connected to the medium return port 12 of the pressure generator via a pipe, and the second pressure generator port 84 is connected to the medium output port 11 of the pressure generator via a pipe.
As a further improvement of this embodiment, a return spring 91 is sleeved on the valve rod 96, the return spring 91 is located in the inner cavity of the valve cavity 81, one end of the return spring 91 is fixedly connected to the valve rod 96, and the other end of the return spring abuts against the rear valve seat 99, the valve rod 96 and the valve plate 97 are kept at the rear dead center position by the elastic force of the return spring 91, and the valve plate 97 is pushed to move forward by overcoming the elastic force of the return spring 91 only when the gland 9 is pressed.
The working principle of this embodiment is similar to the previous embodiment. The medium output end 11 is connected with the output pipe of a pressure generator such as a hydraulic pump and an air pump, and the medium return end 12 is connected with the medium recovery pipe of the hydraulic pump or connected with the atmosphere. In use, in a state that the gland 9 is released, the two valve plates 97 in the front pipeline switching device 7 and the rear pipeline switching device 8 are both located at a rear dead center position and cover the rear valve plate seat 99, at this time, the valve plates 97 close a passage between the pressure generator second interface 84 and the input/output port 82, and the pressure generator first interface 83 is communicated with the input/output port 82; the medium output by the pressure generator is injected into the first interface 83 of the pressure generator of the front pipeline switching device 7 through the medium output end 11, and is injected into the front end of the piston cylinder 5 through the input/output port 82 of the front pipeline switching device 7 communicated with the first interface, so that the piston 6 is pushed to move backwards, and the action of stretching the air bag 3 is further realized. Meanwhile, the medium return end 12 is communicated with the input/output port 82 of the rear pipe switching device 8 through the pressure generator first port 83 of the rear pipe switching device 8 and the front end of the inner cavity of the valve chamber 81 of the rear pipe switching device 8, so that when the piston 6 moves backward, the medium behind the piston 6 can be smoothly guided into the medium return end 12 through the input/output port 82 of the rear pipe switching device 8 and finally flows back to the medium storage tank of the hydraulic pump, or can be directly discharged to the atmosphere when an air pump is used.
In the pushing operation, the pressing cover 9 needs to be pressed, the two valve plates 97 in the front pipeline switching device 7 and the rear pipeline switching device 8 synchronously move to the front dead center position and cover the front valve plate seat 98, at this time, the valve plates 97 close the passage between the first interface 83 and the input/output port 82 of the pressure generator, and the second interface 84 of the pressure generator is communicated with the input/output port 82; the medium output by the pressure generator is injected into the second interface 84 of the pressure generator of the rear pipeline switching device 8 through the medium output end 11, and is injected into the rear end of the piston cylinder 5 through the input/output port 82 of the rear pipeline switching device 8 communicated with the second interface, so as to push the piston 6 to move forwards, and further realize the action of compressing the air bag 3. Meanwhile, the medium return end 12 is communicated with the input/output port 82 of the front pipe switching device 7 through the second interface 84 of the pressure generator of the front pipe switching device 7 communicated with the medium return end and the rear end of the inner cavity of the valve cavity 81 of the front pipe switching device 7, so that the medium in front of the piston 6 can be smoothly introduced into the medium return end 12 through the input/output port 82 of the front pipe switching device 87 when the piston 6 moves forward, and finally flows back to the medium storage tank of the hydraulic pump, or can be directly discharged to the atmosphere when an air pump is adopted.
Claims (2)
1. Helping hand formula medicine dispenser, including storing up cartridge case (1) and installing conveyer pipe (2) at storage cartridge case (1) front end, its characterized in that: the side wall of the medicine storage barrel (1) is provided with a breathing hole, and an air bag (3) communicated with the delivery pipe (2) is arranged in the inner cavity of the medicine storage barrel (1); the rear end of the drug storage cylinder (1) is fixedly connected with a piston cylinder (5), the piston cylinder (5) and the drug storage cylinder (1) are coaxially arranged, a piston (6) is slidably mounted in the piston cylinder (5), a telescopic rod (4) is mounted in the piston cylinder (5), the front end of the telescopic rod (4) penetrates through a front end cover (51) of the piston cylinder (5) and is fixedly connected to the rear end of the air bag (3), and the rear end of the telescopic rod (4) is fixedly connected to the piston (6); the front end of the piston cylinder (5) is provided with a front channel opening (52) communicated with an inner cavity of the piston cylinder, the rear end of the piston cylinder (5) is provided with a rear channel opening (53) communicated with the inner cavity of the piston cylinder, the front channel opening (52) is connected with a pressure generator through a front pipeline switching device (7), and the rear channel opening (53) is connected with the pressure generator through a rear pipeline switching device (8).
2. The power-assisted medicine dispenser according to claim 1, wherein the front pipeline switching device (7) and the rear pipeline switching device (8) comprise a valve cavity (81) with a columnar structure, and a plunger (85) slidably mounted in an inner cavity of the valve cavity (81) and in piston fit with the inner wall of the valve cavity (81), the front end of the valve cavity (81) is provided with an input/output port (82) communicated with the inner cavity of the valve cavity, the side wall of the valve cavity (81) is provided with a first pressure generator interface (83) and a second pressure generator interface (84) communicated with the inner cavity of the valve cavity, the distance between the first pressure generator interface (83) and the second pressure generator interface (84) in the axial direction of the valve cavity (81) is greater than the length of the plunger (85), the plunger (85) is provided with a through hole (86) communicated with the rear end face from the front end face of the plunger, and the rear end of the plunger (85) is, the compression rod (87) extends to the outside of the valve cavity (81) and is fixedly connected with the gland (9); the input/output port (82) of the front pipeline switching device (7) is communicated with the front channel port (52) through a pipeline, the first interface (83) of the pressure generator of the front pipeline switching device (7) is communicated with the medium output end of the pressure generator through a pipeline, and the second interface (84) of the pressure generator is communicated with the medium return end of the pressure generator through a pipeline; the input/output port (82) of the rear pipeline switching device (8) is communicated with the rear channel port (53) through a pipeline, the first interface (83) of the pressure generator of the rear pipeline switching device (8) is communicated with the medium return end of the pressure generator through a pipeline, and the second interface (84) of the pressure generator is communicated with the medium output end of the pressure generator through a pipeline.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811513124.4A CN109568130B (en) | 2018-12-11 | 2018-12-11 | Power-assisted medicine dispensing device |
| CN202110051752.0A CN112716796B (en) | 2018-12-11 | 2018-12-11 | Power-assisted medicine dispensing device |
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| CN201811513124.4A CN109568130B (en) | 2018-12-11 | 2018-12-11 | Power-assisted medicine dispensing device |
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| CN109568130A CN109568130A (en) | 2019-04-05 |
| CN109568130B true CN109568130B (en) | 2021-02-05 |
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| CN113509381B (en) * | 2021-08-06 | 2023-09-22 | 四川省医学科学院·四川省人民医院 | Liquid extraction assembly for dispensing robot |
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| CH119329A (en) * | 1925-03-17 | 1927-04-01 | Cournand Jules | Syringe-ampoule. |
| JPS62500429A (en) * | 1984-09-07 | 1987-02-26 | ヴア−グナ−，ヴオルフガング | Injection device with sensor |
| US4813937A (en) * | 1986-05-07 | 1989-03-21 | Vaillancourt Vincent L | Ambulatory disposable infusion delivery system |
| WO1988002637A2 (en) * | 1986-10-17 | 1988-04-21 | Pattullo, Norman | Apparatus for feeding drugs |
| CN2110862U (en) * | 1991-12-20 | 1992-07-22 | 罗正祥 | Atmospheric pressure type graduated cylinder |
| CN2223103Y (en) * | 1995-03-31 | 1996-03-27 | 四川省南充中心医院 | Venous transfusion medical fluid dissolution preparing device |
| US5785701A (en) * | 1996-09-17 | 1998-07-28 | Becton Dickinson And Company | Sterile vial connector assembly for efficient transfer of liquid |
| US5954696A (en) * | 1997-12-15 | 1999-09-21 | B. Braun Medical, Inc. | Pressure infusion pump |
| JP3928248B2 (en) * | 1998-02-27 | 2007-06-13 | ニプロ株式会社 | Chemical liquid self-injection tool |
| CN2384625Y (en) * | 1999-09-03 | 2000-06-28 | 卿平 | Medicine dispensing device |
| US20030216695A1 (en) * | 2002-05-17 | 2003-11-20 | Chang-Ming Yang | Needle syringe |
| WO2006016869A1 (en) * | 2004-07-08 | 2006-02-16 | Drugtech Corporation | Delivery system |
| WO2006042554A2 (en) * | 2004-10-21 | 2006-04-27 | Danfoss A/S | Device for micro dialysis integrating pump, probe and perfusion fluid |
| EP1833532B1 (en) * | 2004-12-24 | 2011-02-23 | Collyn Patent Holdings Pty Ltd | Safety syringe |
| US7887528B2 (en) * | 2006-09-20 | 2011-02-15 | Yandell Marion E | Vial assembly and method for reducing nosocomial infections |
| WO2008152639A2 (en) * | 2007-06-12 | 2008-12-18 | Bypass, Inc. | Pressure pulse actuating device for delivery systems |
| CA2607399A1 (en) * | 2007-10-22 | 2009-04-22 | Ming-Jeng Shue | Intravenous catheter introducing device |
| WO2014006730A1 (en) * | 2012-07-05 | 2014-01-09 | 有限会社日本エレクテル | Balloon catheter system |
| CN104470432B (en) * | 2012-08-02 | 2016-10-12 | 张建铭 | There is the syringe-type vacuum blood collector of needle point protection |
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| EP2994223B1 (en) * | 2013-05-07 | 2018-05-16 | Biosafe S.A. | Mixing system for mixing biological specimens with additives |
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| CN204233539U (en) * | 2014-09-26 | 2015-04-01 | 河南科技大学第一附属医院 | A kind of anti-pollution injector |
| CN104337523B (en) * | 2014-10-24 | 2016-06-01 | 吴燕霞 | The syringe of energy auto-pumping |
| CN105078753A (en) * | 2015-09-10 | 2015-11-25 | 肖刚 | Hydro-acupuncture rapid dispensing apparatus |
| US10286151B2 (en) * | 2016-02-26 | 2019-05-14 | West Pharma. Services IL, Ltd. | Plunger with reduced leakage during storage |
| CN206687910U (en) * | 2016-08-01 | 2017-12-01 | 廖崇州 | Move medicine device |
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| CN108904275A (en) * | 2018-06-07 | 2018-11-30 | 刘静 | Easy dispensing injector with pin |
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| CN109568130A (en) | 2019-04-05 |
| CN112716796A (en) | 2021-04-30 |
| CN112716796B (en) | 2022-07-08 |
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