CN219308771U

CN219308771U - Quantitative injection dropper

Info

Publication number: CN219308771U
Application number: CN202320213942.2U
Authority: CN
Inventors: 丛景; 吴奕婷; 冯一帆; 程意文; 袁源智; 郭译侬; 董春琼
Original assignee: Zhongshan Hospital Fudan University
Current assignee: Zhongshan Hospital Fudan University
Priority date: 2023-02-14
Filing date: 2023-02-14
Publication date: 2023-07-07
Anticipated expiration: 2033-02-14

Abstract

The utility model provides a quantitative injection dropper which comprises a sac and an injection tube, wherein one side of the sac is provided with an air inlet and outlet hole communicated with the inside and the outside of the sac, the injection tube is connected with the other side of the sac, a liquid containing cavity is arranged in the injection tube, the liquid containing cavity is communicated with the sac, and an injection head communicated with the inside and the outside of the liquid containing cavity is arranged on the injection tube. The quantitative injection dropper is capable of quantitatively controlling injection of medicines and the like, the bag part is communicated with the liquid accommodating cavity through air inlet and outlet holes, pushing force and suction force to the liquid accommodating cavity are generated by pressing the bag, and medicines in the liquid accommodating cavity can be quantitatively controlled by plugging and opening the air inlet and outlet holes in the process of pressing the bag.

Description

Quantitative injection dropper

Technical Field

The utility model relates to the technical field of medical experiments, in particular to a quantitative injection dropper.

Background

The dropper is a common experimental appliance in medical experiments, and is used for sucking and dripping the liquid medicine for experiments to realize the transfer of the liquid medicine for experiments, wherein the dropper is required to be kept perpendicular to the upper part of the container during dripping, so that the tilting is avoided, the dropper is contraindicated to be inverted, the dropper cannot extend into the container, the container wall cannot be touched, and besides sucking the solution, the tip of the dropper cannot be contacted with other objects so as to avoid contamination by impurities.

For example, chinese patent publication No. CN2801278Y discloses a dropper for transferring small amounts of liquid, which is composed of a bladder and a straight tube connected as one body; both the bladder and the straight tube are made of plastic. The dropper can be processed and molded by adopting an injection molding process, and the raw material cost and the processing cost are very low; the plastic bag is not crushed in the transportation and storage processes; the scale mark can be formed in the forming process, the drip tube is convenient and practical, the existing drip tube adopts a single outlet, only has pushing injection or negative pressure suction effect through pressing operation, although the liquid can be pushed in, the negative pressure generated by the single outlet changes when the liquid is sucked, and the problem that the extraction amount cannot be adjusted exists.

In view of the foregoing, there is an urgent need for an injection dropper capable of adjusting the amount of extraction.

Disclosure of Invention

In order to solve the problem that the extraction amount cannot be adjusted by the existing dropper, the utility model provides a quantitative injection dropper.

According to one object of the present utility model, there is provided a quantitative injection dropper comprising:

one side of the bag is provided with an air inlet and outlet hole communicated with the inside and the outside of the bag;

the injection tube is connected with the other side of the sac, a liquid accommodating cavity is arranged in the injection tube, the liquid accommodating cavity is communicated with the sac, and an injection head which is communicated with the inside and the outside of the liquid accommodating cavity is arranged on the injection tube.

Preferably, the quantitative injection dropper further comprises an elastic membrane, the elastic membrane is fixedly connected with the inner wall of the liquid accommodating cavity, a gas flow gap is reserved between the elastic membrane and the inner wall of the liquid accommodating cavity, the number of the elastic membranes is two, and the gas flow gaps of the two elastic membranes are arranged in a staggered mode in the axial direction of the injection tube.

Preferably, the two elastic films are sequentially arranged along the axial direction of the injection tube, and the two elastic films are attached to each other.

Preferably, the quantitative injection dropper further comprises a metering piece, wherein the metering piece is arranged on the injection tube, and the metering piece is arranged along the axial direction of the injection tube.

Preferably, the quantitative injection dropper further comprises a filter element, and the filter element is arranged on the air inlet and outlet hole.

Preferably, the quantitative injection dropper further comprises a hand piece, the bag is embedded in the hand piece, the pressing piece is arranged on the bag and communicated with the bag, the pressing piece extends out of the hand piece, the air inlet and outlet holes are formed in the pressing piece, the injection tube is embedded in the hand piece, and the injection head is exposed out of the hand piece.

Preferably, a bottoming sensing piece is arranged on one side of the inner wall of the bag, opposite to the pressing piece, wherein the bottoming sensing piece is a hard bottoming sensing piece which is elliptical.

Preferably, the hand piece is a transparent tubular hand piece, the bag is a tubular bag, and the axis of the injection tube, the axis of the bag and the axis of the hand piece are coincident.

Preferably, the hand piece is a hand piece with an oval outer diameter, the axis of the injection head is parallel to the axis of the hand piece, and the axis of the injection head is perpendicular to the long axis of the oval outer diameter of the hand piece.

Preferably, the quantitative injection dropper further comprises a flexible supporting pad, wherein the flexible supporting pad is fixedly arranged on the periphery of the end part, close to the injection head, of the handheld piece.

Compared with the prior art, the utility model has the beneficial effects that:

1. the quantitative injection dropper is capable of quantitatively controlling injection of medicines and the like, the bag part is communicated with the liquid accommodating cavity through air inlet and outlet holes, pushing force and suction force to the liquid accommodating cavity are generated by pressing the bag, and medicines in the liquid accommodating cavity can be quantitatively controlled by plugging and opening the air inlet and outlet holes in the process of pressing the bag;

2. the quantitative injection dropper is suitable for the design of single-hand operation of pressing and pushing, the extraction of abdominal cavity body fluid can be completed by controlling the side pressing piece to extrude the bag, and the pressing piece is positioned at the side of the handheld piece, so that the operation is easier to control by one hand, the injection stability is good, and compared with the existing injection from the tail end of the injector, and the dropper, the rationality of the operation method and the injection stability are better;

3. according to the quantitative injection dropper, the injection angle is convenient to position, the injection head is in offset design, the needle inserting angle of an injection needle on the injection head can be controlled through the inclination of the hand piece, safer needle inserting depth can be conveniently controlled, the needle inserting angle is more in accordance with experimental requirements, and experimental operation safety is improved from various aspects;

4. this ration injection burette separates the liquid between syringe and the bag through the elastic membrane, avoids the liquid extravagant, influences the accuracy nature of liquid volume, and syringe part design measuring piece can accurate suggestion liquid holds the liquid volume in chamber.

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings.

Drawings

FIG. 1 is a schematic view of a cross-section of one embodiment of a quantitative injection dropper according to the present utility model.

Fig. 2 is a schematic view showing connection between an injection head and an injection tube according to an embodiment of the quantitative injection dropper of the present utility model.

FIG. 3 is a schematic view of a metering device according to an embodiment of the quantitative injection dropper of the present utility model.

FIG. 4 is a schematic view of an elastic membrane of an embodiment of a quantitative injection dropper according to the present utility model.

FIG. 5 is a schematic view of another elastic membrane of an embodiment of a quantitative injection dropper according to the present utility model.

In the figure: 100. a pouch; 101. a pressing member; 102. a bottoming sensing member; 103. air inlet and outlet holes; 200. a syringe; 201. a liquid containing chamber; 202. an injection head; 300. an elastic film; 300a, an elastic membrane; 300b, an elastic membrane; 400. a metering member; 500. a filter; 600. a hand piece; 700. a flexible support pad.

Detailed Description

The following description is presented to enable one of ordinary skill in the art to practice the utility model. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the utility model defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the utility model.

Example 1

Referring to fig. 1, the present utility model provides a technical solution: a quantitative injection dropper, comprising:

a bag 100, wherein one side of the bag 100 is provided with an air inlet and outlet hole 103 communicated with the inside and the outside of the bag 100;

the syringe 200, syringe 200 and the opposite side of bag 100 are connected, are provided with liquid holding chamber 201 in the syringe 200, and liquid holding chamber 201 and bag 100 are linked together to be provided with the injection head 202 that communicates the inside and outside of liquid holding chamber 201 on the syringe 200.

Through connecting the bag 100 and the injection tube 200, the operator blocks the air inlet and outlet hole 103 and presses the bag 100 during operation, so that the injection tube 200 can suck and inject external liquid through the injection head 202, the sucked liquid stays in the liquid accommodating cavity 201, the air inlet and outlet hole 103 is further increased, the operator can open and close the air inlet and outlet hole through the finger belly to play a role in negative pressure regulation, the injection device with a single outlet is more flexible, and the pressure balance in the liquid accommodating cavity 201 can be achieved through the air inlet and outlet of the air inlet and outlet hole 103, so that quantitative liquid extraction is completed.

The drip tube solves the problems that the traditional drip tube with a single outlet only has pushing injection or negative pressure suction effect through pressing operation, although the liquid can be pushed in, the negative pressure generated by the single outlet when the liquid is sucked is changed, and the extraction amount cannot be adjusted.

With respect to the quantitative extraction of the liquid, it should be noted that, in the process of extracting the liquid by the injection device, the required amount is reached, but the negative pressure is too high, the air can slowly enter the bag 100 through the air inlet and outlet hole 103 by releasing the air inlet and outlet hole 103, then releasing the negative pressure, pushing the injection of the liquid by pneumatic transmission, and the principle of air pressure balance, sucking the external liquid by the negative pressure, wherein the bag 100 and the finger abdomen are pressed to cover or uncover the air inlet and outlet hole 103 to obtain the suction force, and sucking the liquid medicine of the required metering.

The operator passes through hand shutoff business turn over gas pocket 103, and then realizes the accurate control to the interior pumping liquid of liquid accommodation chamber 201, and wherein in order to avoid hand shutoff business turn over gas pocket 103 in-process, pollutant such as dust of hand adhesion gets into bag 100 through business turn over gas pocket 103, and then pollutes the liquid in the liquid accommodation chamber 201, and further, this ration injection burette still includes filter 500, and filter 500 installs on business turn over gas pocket 103.

In one embodiment of the present utility model, the air volume of the bag 100 is 1ml, which is used to push the liquid in the liquid containing cavity 201 to enter, the diameter of the air inlet and outlet hole 103 is 3mm, so as to ensure the air to enter and exit, the finger width of the adult operator is about 25mm, the finger width can be covered completely, the finger abdomen is soft and elastic, and the finger abdomen can be well attached to the air inlet and outlet hole 103, so that the situation that the operator can have insufficient attachment between the air inlet and outlet hole 103 and the finger abdomen of the operator in the process of opening and closing the air inlet and outlet hole 103 through the finger abdomen is avoided.

Specifically, the filter 500 is a filter membrane, where the filter membrane can block contaminants such as dust outside the air inlet and outlet 103, and can ensure that air at two ends of the air inlet and outlet 103 can be normally communicated.

In order to make the quantitative injection dropper suitable for single-hand pressing injection operation, an operator can conveniently hold the whole quantitative injection dropper, and the following embodiment is presented on the basis of embodiment 1.

Example 2

As shown in fig. 1, the quantitative injection dropper further comprises a hand piece 600, the bag 100 is embedded in the hand piece 600, wherein the bag 100 is provided with a pressing piece 101, the pressing piece 101 is communicated with the bag 100, the pressing piece 101 extends out of the hand piece 600, the air inlet and outlet hole 103 is formed in the pressing piece 101, the injection tube 200 is embedded in the hand piece 600, and the injection head 202 is exposed out of the hand piece 600.

By adding the hand piece 600 and further limiting the position relation among the hand piece 600, the bag 100 and the injection tube 200, wherein the hand piece 600 is a hard hand piece, so that the hand piece 600 protects the bag 100 and the injection tube 200, the bag 100 and the injection tube 200 are prevented from being touched in the using process, the suction precision is prevented from being influenced, the pressing piece 101 is positioned outside the hand piece 600, an operator can adjust the negative pressure in the bag 100 only by pressing the pressing piece 101 at the part, error touch is avoided, and meanwhile, the pressing piece 101 is positioned at the side edge of the hand piece 600 and is suitable for single-hand operation.

In order to improve the usability of the quantitative injection dropper, further, a bottoming sensing piece 102 is arranged on one side of the inner wall of the bag 100 opposite to the pressing piece 101, wherein the bottoming sensing piece 102 is a hard bottoming sensing piece 102 with an elliptical shape, and an operator can judge the pressing amplitude by matching with the bottoming sensing piece 102 when operating the pressing piece 101 by adding the bottoming sensing piece 102, so that the pumping and injection operations are stopped in time.

Specifically, the side of the pressing member 101 away from the pouch 100 is arc-shaped, and the bottoming sensing member 102 is a bottoming sensing member of hard silica gel.

In one embodiment of the present utility model, the quantitative injection dropper is applied to the intraperitoneal quantitative injection of experimental mice, wherein an injection needle is detachably connected to the injection head 202.

The mice and the human are mammals, and are similar to the human in physiological and biochemical aspects, metabolic pathways and regulation mechanisms thereof, so that research results of the mice can be reasonably deduced to the human, and therefore, in experimental mammals of mammals, the experimental mice are most widely applied, various treatment experiments, modeling and the like are very common by injecting medicines, gas/liquid and the like into abdominal cavity or extracting body fluid of the abdominal cavity, and effective injection or extraction of the body fluid of the abdominal cavity is the basis for obtaining accurate experimental numbers.

When the experimental mouse is operated, the injection liquid is preset in the liquid accommodating cavity 201, an operator plugs the air inlet and outlet holes 103 through the finger abdomen, and presses the bag 100 to push the liquid in the liquid accommodating cavity 201 to enter the experimental mouse body through the injection head 202.

Through the control of the bag 100 and the air inlet and outlet holes 103, not only can the liquid be accurately injected into the experimental mice, but also the body fluid of the experimental mice can be extracted, and the liquid can be accurately extracted.

In order to control safer needle insertion depth and more meet the needle insertion angle required by experiments, the utility model further provides the following embodiments.

Example 3

As shown in fig. 1-3, the handpiece 600 is a handpiece 600 having an oval outer diameter, the axis of the injection head 202 is parallel to the axis of the handpiece 600, and the axis of the injection head 202 is perpendicular to the major axis of the oval outer diameter of the handpiece 600.

Through setting up syringe 202 off side to inject the external diameter of piece 600 and inject, be convenient for the operator to hold oval hand piece 600 minor diameter both sides, when inserting the needle through the device, with the major axis of the oval external diameter of piece 600 wherein one end as the fulcrum support skin needle-in, with control needle depth, accomplish after the injection, can pull out the needle without loosening business turn over gas pocket 103, do not influence injection effect, wherein when experimental mouse intraperitoneal injection, needle-in angle is 30 to 60, in order to reach the injection requirement of experimental requirement.

When the device is applied to an experimental mouse, in view of the abdominal characteristics of the experimental mouse, the length of the injection needle is 0.4-0.8cm, the inner diameter of the needle head is 0.16mm, the effectiveness and smoothness of needle insertion force are ensured by the triangular pointed side edge of the needle head, and meanwhile, the needle insertion depth is controlled, so that accidental injury to organs in the abdominal cavity is avoided.

In order to avoid discomfort caused by the lateral side of the hand piece 600 pressing the skin of the patient during the injection process of the injection needle, the quantitative injection dropper further comprises a flexible supporting pad 700, wherein the flexible supporting pad 700 is fixedly arranged on the periphery of the end part of the hand piece 600 close to the injection head 202.

In the conventional dropper structure, in the process of rebounding the dropper head after the dropper head is pressed, the suction force cannot be controlled, the sucked liquid easily flows back into the dropper head part, so as to avoid that the liquid inside the syringe 200 is flushed into the bag 100 in the process of sucking the external liquid through the syringe head 202, that is, the liquid is wasted, the precise amount of the injected liquid cannot be ensured, and air is mixed, so that the accuracy of the sucking amount of the quantitative injection dropper is improved, and the following embodiment is further provided on the basis of embodiment 2.

Example 4

As shown in fig. 1-5, the quantitative injection dropper further comprises an elastic membrane 300, the elastic membrane 300 is fixedly connected with the inner wall of the liquid accommodating cavity 201, a gas flow gap is reserved between the elastic membrane 300 and the inner wall of the liquid accommodating cavity 201, the number of the elastic membranes 300 is two, the gas flow gaps of the two elastic membranes 300 are arranged in a staggered manner in the axial direction of the injection tube 200, when an operator operates the injection tube 200 to suck liquid, the injection head 202 is placed downwards, the injection tube 200 splashes in the liquid accommodating cavity 201 under the action of negative pressure in the liquid sucking process, and the two elastic membranes 300 can shield the splashed liquid on the premise of ensuring the internal communication of the liquid accommodating cavity 201 and the bag 100, so that the liquid is prevented from entering the bag 100.

Further, the two elastic films 300 are sequentially arranged along the axial direction of the syringe 200, and the two elastic films 300 are attached to each other.

In one embodiment of the present utility model, as shown in fig. 1, 3, 4 and 5, two elastic films 300 are an elastic film 300a and an elastic film 300b, respectively.

Through limiting the position relation of the two elastic films 300, the two elastic films 300 are attached to each other under the action of elasticity, and the two elastic films 300 attached to each other can fully block the liquid between the bag 100 and the injection tube 200, so that the liquid inside the injection tube 200 is prevented from flowing backwards into the bag 100, and meanwhile, the two elastic films 300 can deform when the two elastic films 300 are subjected to negative pressure action, so that a ventilation gap is generated between the two elastic films 300, and the communication between the inside of the injection tube 200 and the gas inside the bag 100 is ensured.

In order to facilitate the operator to read the amount of the liquid sucked in the syringe 200 outside the device to ensure the accuracy of the sucked liquid amount, further, the hand piece 600 is a transparent tubular hand piece 600, the bag 100 is a tubular bag 100, the axis of the syringe 200, the axis of the bag 100 and the axis of the hand piece 600 are coincident, the syringe 200 is provided with a metering piece 400, and the metering piece 400 is arranged along the axis direction of the syringe 200.

By setting the hand piece 600 to be transparent tubular and limiting the axial positions among the bag 100, the hand piece 600 and the injection tube 200, an operator is not easy to shield the injection tube 200 when pressing the bag 100, and can check the liquid amount in the injection tube 200 by matching with the metering piece 400 on the injection tube 200, so that the accuracy of the liquid sucking amount of the device is improved.

In one embodiment of the utility model, the metering member 400 is a scale mark.

In summary, the quantitative injection dropper has the following advantages:

the quantitative injection dropper can quantitatively control the injection of medicines and the like, the part of the bag 100 is filled with air from the air inlet and outlet holes 103, the bag 100 is communicated with the liquid accommodating cavity 201, the pushing force and the suction force to the liquid accommodating cavity 201 are generated by pressing the bag 100, and the medicines in the liquid accommodating cavity 201 can be quantitatively controlled by plugging and opening the air inlet and outlet holes 103 in the process of pressing the bag 100;

the quantitative injection dropper is suitable for the design of single-hand operation of pressing and pushing, the extraction of abdominal cavity body fluid can be completed by controlling the side pressing piece 101 to squeeze the bag 100, and the pressing piece 101 is positioned at the side of the hand piece 600, so that the operation is easier to control by one hand, the injection stability is good, and compared with the existing single-hand injection dropper and the dropper, the rationality of the operation method and the injection stability are better;

according to the quantitative injection dropper, the injection angle is convenient to position, the injection head 202 is in an offset design, the needle inserting angle of an injection needle on the injection head 202 can be controlled through the inclination of the hand piece 600, the safer needle inserting depth can be conveniently controlled, the needle inserting angle is more in accordance with the experimental requirements, and the experimental operation safety is improved from various aspects;

according to the quantitative injection dropper, liquid between the injection tube 200 and the bag 100 is blocked through the elastic membrane 300, so that liquid waste is avoided, the accuracy of liquid quantity is influenced, the metering piece 400 is arranged on the part of the injection tube 200, and the liquid quantity of the liquid containing cavity 201 can be accurately prompted.

The above-described embodiments are only for illustrating the technical spirit and features of the present utility model, and it is intended to enable those skilled in the art to understand the content of the present utility model and to implement it accordingly, and the scope of the present utility model as defined by the present embodiments should not be limited only by the present embodiments, i.e. equivalent changes or modifications made in accordance with the spirit of the present utility model will still fall within the scope of the present utility model.

Claims

1. A quantitative injection dropper, comprising:

a bag (100), wherein one side of the bag (100) is provided with an air inlet and outlet hole (103) communicated with the inside and the outside of the bag (100);

the injection tube (200) is connected with the other side of the bag (100), a liquid accommodating cavity (201) is arranged in the injection tube (200), the liquid accommodating cavity (201) is communicated with the bag (100), and an injection head (202) which is communicated with the inside and the outside of the liquid accommodating cavity (201) is arranged on the injection tube (200);

still include hand piece (600), bag (100) inlay in hand piece (600), wherein be provided with on bag (100) and press piece (101), press piece (101) with bag (100) are linked together, press piece (101) extend in hand piece (600) are outer, business turn over gas pocket (103) set up in on pressing piece (101), syringe (200) inlay in hand piece (600), wherein injection head (202) expose outside hand piece (600).

2. A quantitative injection dropper as claimed in claim 1, wherein:

still include elastic membrane (300), elastic membrane (300) with liquid holds chamber (201) inner wall fixed connection, elastic membrane (300) with reserve between liquid holds chamber (201) inner wall and have the gas flow clearance, the quantity of elastic membrane (300) sets up to two, two elastic membrane (300) the gas flow clearance is in dislocation arrangement in injection tube (200) axis direction.

3. A quantitative injection dropper as claimed in claim 2, wherein:

the two elastic films (300) are sequentially arranged along the axial direction of the injection tube (200), and the two elastic films (300) are attached to each other.

4. A quantitative injection dropper as claimed in claim 1, wherein:

the injection tube (200) is provided with the metering piece (400), and the metering piece (400) is arranged along the axis direction of the injection tube (200).

5. A quantitative injection dropper as claimed in claim 1, wherein:

the filter assembly further comprises a filter (500), and the filter (500) is installed on the air inlet and outlet hole (103).

6. A quantitative injection dropper as claimed in claim 1, wherein:

one side of the inner wall of the bag (100) opposite to the pressing piece (101) is provided with a bottoming sensing piece (102), wherein the bottoming sensing piece (102) is a hard bottoming sensing piece (102) which is elliptical.

7. A quantitative injection dropper as claimed in claim 1, wherein:

the hand piece (600) is a transparent tubular hand piece (600), the bag (100) is a tubular bag (100), and the axis of the injection tube (200), the axis of the bag (100) and the axis of the hand piece (600) are coincident.

8. A quantitative injection dropper as claimed in claim 7, wherein:

the handpiece (600) is a handpiece (600) having an oval outer diameter, the axis of the injection head (202) is parallel to the axis of the handpiece (600), and the axis of the injection head (202) is perpendicular to the major axis of the oval outer diameter of the handpiece (600).

9. A quantitative injection dropper as claimed in claim 1, wherein:

also included is a flexible support pad (700), the flexible support pad (700) being fixedly disposed about the periphery of the end of the handpiece (600) proximate the injection head (202).