CN111329598A

CN111329598A - Liquid injection device

Info

Publication number: CN111329598A
Application number: CN201811558595.7A
Authority: CN
Inventors: 梁金
Original assignee: Shanghai Kanglulian Medical Technology Co ltd
Current assignee: Shanghai Kanglulian Medical Technology Co ltd
Priority date: 2018-12-19
Filing date: 2018-12-19
Publication date: 2020-06-26
Also published as: WO2020125474A1

Abstract

The application provides an injection device, which mainly comprises two injection components, wherein each injection component is respectively provided with an accommodating body, a liquid drawing unit and a liquid outlet unit, the accommodating body is internally provided with a cavity with variable volume, the liquid drawing unit and the liquid outlet unit are respectively communicated with the cavity, the volume of the cavity is increased to enable the interior of the cavity to generate negative pressure, liquid is injected into the cavity through the liquid drawing unit, the volume of the cavity is reduced to enable the interior of the cavity to generate positive pressure, and the liquid in the cavity is discharged through the liquid outlet unit.

Description

Liquid injection device

Technical Field

The embodiment of the application relates to the technical field of medical instruments, in particular to a medical continuous liquid injection device.

Background

Urinary calculi are one of the most common diseases in urology surgery, have a prevalence rate of 1% -20%, and are easy to relapse. Although urinary calculi are benign diseases, urinary system infection, urinary hydrops and even kidney function damage can be caused, so that urinary calculi still pose a great threat to human health.

At present, the minimally invasive treatment of urinary calculi becomes a conventional means for treating urinary calculi, and more than 90 percent of urinary calculi operations can be treated in a minimally invasive way in some larger medical centers in China. However, the surgery itself may cause injury to the patient, for example, an extended period of surgery may increase the risk of postoperative infection. Therefore, shortening the operation time and improving the operation efficiency are one of the important directions of the research of the existing urinary calculus intracavity minimally invasive therapeutic apparatus.

In addition, during the operation of the minimally invasive treatment in the urinary calculus cavity, an assistant (medical staff) is needed to assist the main surgeon in performing water injection operation so as to ensure that the operation visual field is clear, thereby facilitating the main surgeon to perform the operation. However, the "water filling" operation requires the assistant to use a large-capacity syringe to perform repeated water pumping and water filling actions, often requires a lot of time, and sometimes even requires two assistants (medical staff) to perform the water pumping and water filling actions in cooperation, which causes unnecessary waste of human resources and reduces the operation efficiency.

In view of this, how to provide a safe, efficient and easy-to-operate medical continuous water injection device to overcome various problems existing in the prior art is a technical problem to be solved by the present application.

Disclosure of Invention

In view of the above problems, a main object of the present invention is to provide an infusion device, which can provide a continuous saline infusion function for a minimally invasive surgery in urinary calculus, ensure a clear surgical field, improve surgical safety, and greatly reduce the working strength of medical staff.

Another objective of the present disclosure is to provide a liquid injection device, which can provide a fully closed liquid path to avoid exposure and contamination of liquid.

Still another object of the present application is to provide a liquid injection device, which has the advantages of simple and easy operation and stable liquid injection.

The application provides priming device, its characterized in that, annotates the liquid subassembly including two, each annotate the liquid subassembly and have respectively: the accommodating body is internally provided with a chamber with variable volume, wherein when the volume of the chamber is reduced, positive pressure is generated in the chamber, and when the volume of the chamber is increased, negative pressure is generated in the chamber; and a liquid drawing unit and a liquid outlet unit which are respectively communicated with the cavity; when negative pressure is generated inside the chamber, liquid is injected into the chamber through the liquid pumping unit to perform liquid pumping operation, and when positive pressure is generated inside the chamber, the liquid in the chamber is discharged through the liquid outlet unit to perform liquid injection operation; and the two cavities of the two liquid injection assemblies are alternately reduced, so that the two liquid outlet units of the two liquid injection assemblies discharge the liquid in the two cavities in an alternating mode, and the continuous liquid injection of the liquid injection device is realized.

Optionally, in an embodiment of the present application, when a force is applied to the container, the container contracts and the volume of the chamber decreases, and when the force is released, the container expands and the volume of the chamber increases.

Optionally, in an embodiment of the present application, the accommodating body is made of an elastic material having an elastic restoring force, so that when the acting force is released, the accommodating body is automatically expanded by the elastic restoring force provided by the elastic material.

Optionally, in an embodiment of the present application, the liquid injection assembly further includes an elastic member, wherein when the acting force is applied to the accommodating body, the elastic member deforms, and when the acting force is released, the elastic member, which deforms, provides an elastic acting force for the accommodating body, so that the accommodating body automatically expands.

Optionally, in an embodiment of the present application, the liquid drawing unit and the liquid outlet unit are one-way valves, where when a negative pressure is generated inside the chamber, the liquid drawing unit is in an open state, and the liquid outlet unit is in a closed state, and when a positive pressure is generated inside the chamber, the liquid drawing unit is in a closed state, and the liquid outlet unit is in an open state.

Optionally, in an embodiment of the present application, the liquid injection device further includes at least one three-way connection member, which is respectively communicated with the two liquid outlet units and/or the two liquid suction units of the two liquid injection assemblies.

Optionally, in an embodiment of the present application, the housing is a bellows-like structure.

Optionally, in an embodiment of the present application, the liquid injection assembly further includes an operation unit, the operation unit is an independent element disposed on the accommodating body or the operation unit and the accommodating body are integrally formed, wherein the operation unit is stressed to reduce a volume of the cavity in the accommodating body.

Optionally, in an embodiment of the present application, the liquid injection device further includes a linkage unit, which is respectively connected to the two operation units of the two liquid injection assemblies, so as to generate linkage change for the two chambers of the two liquid injection assemblies, wherein when the volume of the chamber of one of the two liquid injection assemblies is reduced, the volume of the chamber of the other of the two liquid injection assemblies is increased.

Optionally, in an embodiment of the present application, the liquid injection apparatus further includes a liquid supply device and an endoscope respectively connected via a conduit, so as to alternately inject the liquid provided by the liquid supply device into the two chambers via the two liquid drawing units of the two liquid injection assemblies, and alternately discharge the liquid in the two chambers via the two liquid discharge units, so that the liquid is continuously injected into the endoscope.

According to the technical scheme, the liquid injection device provided by the embodiment of the application has the advantages that the two cavities of the two liquid injection assemblies are alternately reduced, so that the two cavities discharge liquid in an alternate mode, and the function of continuous liquid injection is provided. In the preferred embodiment, this application accessible sets up the linkage unit for two chambeies in annotating the liquid subassembly produce the linkage change, make the liquid injection device's of this application operation more simple and convenient and go out liquid stability. Compared with the prior art, the injection device can effectively reduce the time for switching the injector and the assistant for repeated operation, further effectively shorten the operation time, improve the operation efficiency, provide a fully closed liquid path, and reduce the risk of occurrence of operation-related complications.

In other embodiments, the accommodating body of the present application may be made of an elastic material having an elastic restoring force, so that when the acting force applied to the accommodating body is released, the elastic restoring force of the elastic material may be used to automatically expand the compressed accommodating body to automatically inject the liquid into the evacuated chamber, thereby having the advantages of simple operation and controllable liquid injection flow rate.

In another embodiment, the three-way connecting piece can be arranged to connect the liquid injection device with other related external equipment, so that the liquid injection device and the external related equipment can be conveniently connected and installed.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the embodiments of the present application, and other drawings can be obtained by those skilled in the art according to the drawings.

Fig. 1 to 3 are schematic diagrams of a first embodiment of a liquid injection device of the present application, wherein fig. 1 and 2 are a side sectional view and a side view of the liquid injection device of the first embodiment, respectively; FIG. 3 is a schematic view of an application example of the liquid injection device of the first embodiment;

FIG. 4 is a schematic side view of a second embodiment of a fluid injection apparatus of the present application;

FIG. 5 is a schematic side view of a third embodiment of a fluid injection apparatus of the present application;

fig. 6 and 7 are an overall schematic view and a side schematic view of a fourth embodiment of the liquid injection device of the present application; and

fig. 8 and 9 are an overall schematic view and a side cross-sectional schematic view of a fifth embodiment of the liquid injection device of the present application.

Element number

1 liquid injection device

10,20 annotate liquid subassembly

11,21 container

12,22 chamber

13,23 liquid drawing unit

14,24 liquid outlet unit

15,15a,15b three-way connection piece

16a,16b operating unit

161a,161b handle

162a,162b push rod

17 linkage unit

18a,18b hand held unit

181a,182a holding part

181b,182b grip part

19a,19b three-way valve

191a,192a,191b,192b valve port

2 liquid supply equipment (brine bottle)

3 endoscope

4,5 catheters

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application shall fall within the scope of the protection of the embodiments in the present application.

Please refer to fig. 1 and fig. 2, which are different schematic diagrams of a first embodiment of a liquid injection device of the present application. The embodiment of the present application provides an injection device 1, which can communicate with an external device (e.g. an endoscope), so as to provide an injection operation of liquid for the external device (please refer to the following detailed description). In the embodiment of the present application, the liquid is, for example, a physiological saline used in a surgical procedure, but not limited thereto, and other liquids may also be applied to the injection device 1 of the present application.

As shown in the drawings, the liquid filling device 1 mainly comprises two

liquid filling assemblies

10,20, in the embodiment, each

liquid filling assembly

10,20 has a

container

11,21, a

liquid drawing unit

13,23 and a

liquid outlet unit

14,24, respectively.

A

chamber

12,22 with a variable volume is formed inside the

accommodating body

11,21, wherein the

chamber

12,22 is a relatively closed space, so that when the volume of the

chamber

12,22 is reduced, a positive pressure is generated inside the

chamber

12,22, and when the volume of the

chamber

12,22 is increased, a negative pressure is generated inside the

chamber

12, 22.

In an embodiment, the

accommodating bodies

11,21 may be made of an elastic material having elastic restoring force, for example, the

accommodating bodies

11,21 are balloons, but not limited thereto, and other shapes and materials may also be suitable for the present application. When a force is applied to the accommodating bodies 11,21 (for example, when the outer surface of the balloon is squeezed), the

accommodating bodies

11,21 are contracted to reduce the volumes of the

chambers

12,22 inside the

accommodating bodies

11,21, and when the force applied to the

accommodating bodies

11,21 is released, the

accommodating bodies

11,21 are automatically expanded by the elastic restoring force provided by the elastic material, so that the volumes of the

chambers

12,22 inside the

accommodating bodies

11,21 are automatically increased. It should be noted that the above-mentioned acting force can be implemented by, for example, a manual operation, but is not limited thereto, and in other embodiments, the acting force can also be implemented by, for example, a mechanical operation.

In another embodiment, an elastic member (not shown) may be disposed to provide an elastic force to the

accommodating bodies

11,21, specifically, when the elastic member applies a force to the

accommodating bodies

11,21, the elastic member is also pressed to deform, and when the force applied to the

accommodating bodies

11,21 is released, the deformed elastic member provides an elastic force to the

accommodating bodies

11,21, so that the

accommodating bodies

11,21 expand automatically, and the volume of the

chambers

12,22 inside the

accommodating bodies

11,21 is increased automatically.

In addition, the

liquid drawing units

13,23 and the

liquid outlet units

14,24 are respectively communicated with the two

chambers

12,22 of the two

accommodating bodies

11,21, wherein when the volume of the

chambers

12,22 is reduced to generate negative pressure inside the chambers, liquid can be respectively injected into the

chambers

12,22 through the

liquid drawing units

13,23 to perform liquid drawing operation, and when the volume of the

chambers

12,22 is increased to generate positive pressure inside the chambers, liquid stored in the

chambers

12,22 can be respectively discharged through the

liquid outlet units

14,24 to perform liquid injection operation.

Referring to fig. 2 and fig. 3, in the present embodiment, one end of each of the

liquid drawing units

13 and 23 may be respectively communicated with the

chambers

12 and 22, and the other end of each of the

liquid drawing units

13 and 23 may be merged by the conduit 4 and then communicated with a liquid supply apparatus 2 (e.g., a saline bottle) to inject the liquid (e.g., physiological saline) provided by the liquid supply apparatus 2 into the

chambers

12 and 22. Similarly, one end of each of the

liquid outlet units

14,24 is communicated with the

chambers

12,22, respectively, and the other end of each of the

liquid outlet units

14,24 is communicated with the endoscope 3 after being converged by the guide tube 5, so that the liquid in the

chambers

12,22 is injected into the endoscope 3.

In the embodiment, the

liquid drawing units

13 and 23 and the

liquid outlet units

14 and 24 are four one-way valves respectively to control the flow direction of the liquid. When negative pressure is generated in the

chamber

12,22, the

liquid suction unit

13,23 is in an open state under the action of the negative pressure, and the

liquid outlet unit

14,24 is in a closed state under the action of the negative pressure, and when positive pressure is generated in the

chamber

12,22, the

liquid suction unit

13,23 is in a closed state under the action of the positive pressure, and the

liquid outlet unit

14,24 is in an open state under the action of the positive pressure.

Therefore, the present application can make the two

chambers

12,22 of the two

liquid injection assemblies

10,20 alternately shrink, so that the two

liquid outlet units

14,24 of the two

liquid injection assemblies

10,20 discharge the liquid inside the two

chambers

12,22 in an alternating manner.

Specifically, in the actual operation, the volume of the chamber 22 inside the accommodating body 21 is reduced and the volume of the chamber 12 inside the accommodating body 11 is increased by applying a force to the accommodating body 21 and simultaneously releasing the force applied to the accommodating body 11, in this state, the liquid in the saline bottle 2 can be unidirectionally injected into the chamber 12 through the liquid drawing unit 13 by the negative pressure formed inside the chamber 12, and the liquid in the chamber 22 can be unidirectionally discharged and injected into the endoscope 3 through the liquid discharging unit 24 by the positive pressure formed inside the chamber 22, that is, the liquid injection operation can be performed on the endoscope 3 by the liquid injection assembly 20. When the liquid in the chamber 21 is nearly exhausted, the acting force exerted on the accommodating body 21 can be released, and the acting force is exerted on the accommodating body 11, so that the volume of the chamber 12 inside the accommodating body 11 is reduced, and the volume of the chamber 22 inside the accommodating body 21 is increased, in this state, the liquid in the saline bottle 2 can be unidirectionally injected into the chamber 22 through the liquid drawing unit 23 by the negative pressure formed inside the chamber 22, and meanwhile, the liquid in the chamber 12 can be unidirectionally exhausted through the liquid outlet unit 14 by the positive pressure formed inside the chamber 12 and injected into the endoscope 3, that is, the liquid injection operation is performed on the endoscope 3 by the liquid injection assembly 10. Borrow this through annotating liquid subassembly 10 and annotating liquid subassembly 20 and exert the effort in turn for annotate liquid subassembly 10 and annotate liquid subassembly 20 and pass through pipe 5 with alternate mode and pour into liquid into to endoscope 3, thereby realize that endoscope 6 can annotate liquid to the human body in succession in the operation process, in order to ensure the washing in operation field of vision, consequently, priming device 1 of this application can effectively improve the security of operation, and can alleviate medical personnel's working strength.

In an embodiment of the present application, the liquid injection device 1 further includes at least one three-way connection 15, which can selectively and respectively communicate with the two

liquid outlet units

14,24 and/or the two

liquid suction units

13,23 of the two

liquid injection assemblies

10,20 according to actual requirements.

Referring to fig. 4, in an embodiment, the liquid injection device 1 may include a three-way connection 15, which may be respectively connected to the liquid outlet unit 14 of the liquid injection assembly 10 and the liquid outlet unit 24 of the liquid injection assembly 20, so as to join the passages of the liquid outlet unit 14 and the liquid outlet unit 24 and then communicate with the endoscope 3 shown in fig. 3 through a common conduit (not shown), thereby simplifying the connection operation between the liquid injection device 1 and the endoscope 3.

It should be noted that the arrangement of the three-way connection member 15 is not limited to that shown in fig. 4, in other embodiments, the three-way connection member 15 may be respectively connected to the liquid drawing unit 13 of the liquid filling assembly 10 and the liquid drawing unit 23 of the liquid filling assembly 20, so as to join the passages of the liquid drawing unit 13 and the liquid drawing unit 23 and then connect the passages to the saline bottle 2 in fig. 3 through a common conduit (not shown), thereby simplifying the connection operation between the saline bottle 2 and the liquid filling device 1.

Preferably, referring to fig. 8 and 9, in the present embodiment, the priming device 1 may include two three-

way connectors

15a,15b, wherein the three-way connector 15a is respectively connected to the liquid drawing unit 13 of the priming assembly 10 and the liquid drawing unit 23 of the priming assembly 20, so as to join the passages of the liquid drawing unit 13 and the liquid drawing unit 23 and then connect the passages to the saline bottle 2 in fig. 3, and the three-way connector 15b is respectively connected to the liquid outlet unit 14 of the priming assembly 10 and the liquid outlet unit 24 of the priming assembly 20, so as to join the passages of the liquid outlet unit 14 and the liquid outlet unit 24 and then connect the passages to the endoscope 3 shown in fig. 3.

It should be noted that the

accommodating bodies

11,21 of the present application may be designed as a bellows-like structure as shown in fig. 5 to 9, in addition to the balloon as shown in fig. 1 to 4. However, it is not limited thereto, and other accommodating body structures that can make the

chambers

12,22 formed inside the

accommodating bodies

11,21 be variable in volume can be applied to the present application.

In other embodiments, the

injection assemblies

10,20 are further provided with an

operation unit

16a,16b, respectively. The arrangement, arrangement position, arrangement number, and the like of the

operation units

16a and 16b according to the present invention are not limited to those shown in the drawings of the present application, and in other words, may be changed according to actual needs. For example, the operation unit may be an independent operation element provided on the

accommodating body

11, 21; in other embodiments, the operation unit may be integrally formed with the

accommodating bodies

11,21, that is, the operation unit is a part of the

accommodating bodies

11,21, which only represents the best force application position when applying the force to the

accommodating bodies

11, 21.

Referring to fig. 5, in the embodiment, the operation unit 16a includes a handle 161a and a push rod 162a, and the operation unit 16b includes a push rod 161b and a push rod 162b, when operating, a user can apply force alternately to the

handles

161a and 161b, so that the

push rods

162a and 162b are stressed to respectively squeeze the

accommodating bodies

11 and 21 in the corrugated tube structure, thereby reducing the volume of the

chambers

12 and 22 in the

accommodating bodies

11 and 21, and achieving the purpose of easily squeezing the

accommodating bodies

11 and 21. In addition, when the user releases the force applied to the

handles

161a,161b, the

accommodating bodies

11,21 having the bellows-like structure are automatically expanded by the elastic restoring force provided by the elastic material, so that the external liquid is automatically injected into the

chambers

12,22 by the negative pressure formed in the

chambers

12,22 during the expansion process.

Referring to fig. 6 and 7, in the present embodiment, the

operation units

16a and 16b are respectively the hand-held portions disposed at the two opposite ends of the

cavities

12 and 22, and the liquid injection device 1 further includes a linkage unit 17 (for example, a connecting rod) respectively connected to the

operation units

16a and 16b disposed at the two opposite ends of the

liquid injection assemblies

10 and 20, so that when the volume of the

cavity

12 and 22 of one of the two

liquid injection assemblies

10 and 20 is reduced, the volume of the

cavity

12 and 22 of the other of the two

liquid injection assemblies

10 and 20 is increased, thereby generating linkage change between the two

cavities

12 and 22 of the two

liquid injection assemblies

10 and 20.

Specifically, as shown in the figure, when a user applies a force to the operation unit 16a, for example, pushes the operation unit 16a rightward along the axial direction of the liquid injection device 1, the linkage unit 17 moves rightward along the axial direction of the liquid injection device 1, so as to drive the operation unit 16b to move rightward synchronously, and in this state, the volume of the cavity 12 of the liquid injection assembly 10 is gradually reduced, and the volume of the cavity 22 of the liquid injection assembly 20 is gradually increased; on the contrary, when the user applies a force to the operation unit 16b, for example, pushes the operation unit 16b leftwards along the axial direction of the liquid injection device 1, the linkage unit 17 can move leftwards along the axial direction of the liquid injection device 1, so as to drive the operation unit 16a to move leftwards synchronously, in this state, the volume of the cavity 22 of the liquid injection assembly 20 is gradually reduced, and the volume of the cavity 12 of the liquid injection assembly 10 is gradually increased, so that the volume of the cavity 12 and the volume of the cavity 22 are changed in linkage by the linkage unit 17, thereby the design not only can further simplify the operation, but also can make the continuous liquid discharge of the liquid injection device 1 more stable.

Referring to fig. 8 and 9, the main structure of the liquid injection device 1 of the present embodiment is the same as that of the above embodiment, but the difference is that the liquid injection device 1 is further provided with a

handheld unit

18a,18b, wherein a pair of protruding holding

portions

181a,182a is formed on the handheld unit 18a, and a pair of protruding holding

portions

181b,182b is also formed on the handheld unit 18b, so that the user can respectively hold the holding

portions

181a,182a and the holding

portions

181b,182b with both hands, thereby applying an acting force to the operation unit 16a and the operation unit 16 b.

In addition, the present embodiment further utilizes a three-way valve 19a to integrate the liquid drawing unit 13 and the liquid outlet unit 14 of the liquid injection assembly 10, and the three-way valve 19a has two

valve ports

191a and 192a with one-way flow direction, wherein when negative pressure is generated in the chamber 12, the valve port 191a is opened and the valve port 192a is closed, and when positive pressure is generated in the chamber 12, the valve port 192a is opened and the valve port 191a is closed. Similarly, the liquid drawing unit 23 and the liquid outlet unit 24 of the liquid filling assembly 20 are also replaced by a three-way valve 19b, and the three-way valve 19b also has two

valve ports

191b and 192b with one-way flow directions, wherein when negative pressure is generated in the chamber 22, the valve port 191b is opened and the valve port 192b is closed, and when positive pressure is generated in the chamber 22, the valve port 192b is opened and the valve port 191b is closed, so that the overall structure of the liquid filling device 1 of the present application is further simplified by the above arrangement.

In actual operation, the two hands of the user can respectively hold the holding

portions

181a,182a and the holding

portions

181b,182b, wherein, when the user applies a force to the operation unit 16a, for example, pushes the operation unit 16a rightward along the axial direction of the liquid injection device 1, the linkage unit 17 can move rightward along the axial direction of the liquid injection device 1, so as to drive the operation unit 16b to move rightward synchronously, in this state, the volume of the chamber 12 of the liquid injection assembly 10 is gradually reduced, a positive pressure is generated inside the chamber 12, so that the valve port 192a of the three-way valve 19a is opened and the valve port 191a is closed, and thus the liquid in the chamber 12 is discharged through the valve port 192a and flows out through the three-way connection 15 b; meanwhile, the volume of the chamber 22 of the liquid injection assembly 20 gradually increases, and negative pressure is generated in the chamber 22, so that the valve port 191b of the three-way valve 19b is opened and the valve port 192b is closed, and the liquid flowing in from the three-way connection 15a is injected into the chamber 22 through the valve port 191 b.

Conversely, when the user applies a force to the operating unit 16b, such as pushing the operating unit 16b leftward in the axial direction of the injection device 1, the interlocking unit 17 can be moved leftward in the axial direction of the injection device 1, thereby driving the operation unit 16a to move leftwards synchronously, in this state, the volume of the chamber 22 of the liquid injection assembly 20 is gradually reduced, and positive pressure is generated in the chamber 22, so that the valve port 192b of the three-way valve 19b is opened and the valve port 191b is closed, thereby discharging the liquid in the chamber 22 through the valve port 192b, and flowing out through the three-way connection 15b, meanwhile, the volume of the chamber 12 of the liquid injection assembly 10 gradually increases, so as to generate a negative pressure inside the chamber 12, such that the valve port 191a of the three-way valve 19a is opened and the valve opening 192a is closed, so that the liquid flown in by the three-way connection 15a is injected into the chamber 12 via the valve port 191 a.

Therefore, the liquid injection device 1 of the present embodiment utilizes the linkage unit 17 to make the volume of the chamber 12 and the volume of the chamber 22 change in a linkage manner, so as to increase the stability and controllability of the liquid injection device 1 for performing continuous liquid injection operation, and meanwhile, through the arrangement of the

handheld units

18a and 18b, the user can apply acting force to the operation unit 16a and the operation unit 16b conveniently. Furthermore, the liquid drawing unit and the liquid outlet unit of the liquid injection assembly are integrated by the three-

way valves

19a and 19b, so that the overall structure of the liquid injection device 1 can be simplified, the complexity of the manufacturing work can be reduced, and the manufacturing cost can be reduced.

In conclusion, the liquid injection device disclosed by the invention realizes the function of continuous liquid injection by enabling the two cavities of the two liquid injection assemblies to be alternately changed, and compared with the existing injector water injection, the liquid injection device is simple to operate and can also ensure the stability and continuity of water injection flow and pressure in the operation process. In addition, the time for switching the syringes and the repeated operation of the assistant can be effectively reduced, so that the operation time can be effectively shortened, the operation efficiency can be improved, and the risk of occurrence of operation-related complications can be reduced.

In addition, the liquid injection device can also provide a fully closed liquid passage, so that the exposure and the pollution of liquid in the operation process are avoided, and the operation safety is further improved.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A priming device, comprising:

two annotate liquid subassemblies, each said annotate liquid subassembly has respectively:

the accommodating body is internally provided with a chamber with variable volume, wherein when the volume of the chamber is reduced, positive pressure is generated in the chamber, and when the volume of the chamber is increased, negative pressure is generated in the chamber; and

a liquid drawing unit and a liquid outlet unit which are respectively communicated with the cavity;

when negative pressure is generated inside the chamber, liquid is injected into the chamber through the liquid pumping unit to perform liquid pumping operation, and when positive pressure is generated inside the chamber, the liquid in the chamber is discharged through the liquid outlet unit to perform liquid injection operation; and wherein the one or more of the one,

the two liquid outlet units of the two liquid injection assemblies discharge the liquid in the two cavities in an alternating mode by alternately reducing the two cavities of the two liquid injection assemblies, so that the continuous liquid injection of the liquid injection device is realized.

2. The fluid injection apparatus according to claim 1, wherein when a force is applied to the housing, the housing contracts and the volume of the chamber decreases, and when the force is released, the housing expands and the volume of the chamber increases.

3. The fluid injection apparatus according to claim 2, wherein the container is made of an elastic material having an elastic restoring force, so that when the acting force is released, the container is automatically expanded by the elastic restoring force provided by the elastic material.

4. The liquid injection device according to claim 2, wherein the liquid injection assembly further comprises an elastic member, wherein the elastic member deforms when the acting force is applied to the accommodating body, and the elastic member, which deforms when the acting force is released, provides an elastic acting force for the accommodating body, so that the accommodating body automatically expands.

5. The liquid injection device according to claim 1, wherein the liquid drawing unit and the liquid outlet unit are one-way valves, wherein when negative pressure is generated inside the chamber, the liquid drawing unit is in an open state, and the liquid outlet unit is in a closed state, and when positive pressure is generated inside the chamber, the liquid drawing unit is in a closed state, and the liquid outlet unit is in an open state.

6. The liquid injection device according to claim 1, further comprising at least one three-way connection member, which is respectively connected to the two liquid outlet units and/or the two liquid drawing units of the two liquid injection assemblies.

7. The liquid injection device according to claim 1, wherein the housing is of a bellows structure.

8. The liquid injection device according to any one of claims 1 to 7, wherein the liquid injection assembly further comprises an operation unit, the operation unit is an independent element disposed on the housing or is integrally formed with the housing, and the operation unit is forced to reduce the volume of the chamber in the housing.

9. The filling device according to claim 8, further comprising a linkage unit respectively connected to the two operation units of the two filling assemblies to generate linkage change of the two chambers of the two filling assemblies, wherein when the volume of the chamber of one of the two filling assemblies is reduced, the volume of the chamber of the other of the two filling assemblies is increased.

10. The priming apparatus according to any one of claims 1 to 7 and 9, further comprising a liquid supply device and an endoscope connected via a conduit, respectively, for alternately injecting the liquid supplied from the liquid supply device into the two chambers via the two liquid drawing units of the two priming assemblies, and alternately discharging the liquid in the two chambers via the two liquid discharging units, so that the liquid is continuously injected into the endoscope.