CN113842522A

CN113842522A - Adjustable small-dose injection pump

Info

Publication number: CN113842522A
Application number: CN202111134362.6A
Authority: CN
Inventors: 邓倩; 王利明; 曾丹; 周薇; 杨宇
Original assignee: Individual
Current assignee: Chongqing General Hospital
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2021-12-28
Anticipated expiration: 2041-09-27
Also published as: CN113842522B

Abstract

The invention provides an adjustable small-dose injection pump, which relates to the technical field of medical instruments and comprises a dose continuous pushing assembly, a dose fixed-gear adjusting assembly and an injection assembly, wherein the dose continuous pushing assembly comprises a pushing barrel component, a piston component and an elastic pushing component; the continuous and stable pushing action can be completed only through the dose continuous pushing assembly without an external power supply, the injection amount can be adjusted according to the actual requirements of patients through the dose fixed-gear adjusting assembly, the application range is wide, the use and the operation are convenient, and the injection effect is obvious.

Description

Adjustable small-dose injection pump

Technical Field

The invention relates to the technical field of medical instruments, in particular to an adjustable small-dose injection pump.

Background

The infusion pump or the infusion pump is a special medical device for injecting liquid medicine into a patient body, and is widely used in the medical field, at present, the existing infusion pump or infusion pump in clinic needs to be plugged or charged and then used, and is inconvenient to use, and the existing infusion pump or infusion pump is mainly suitable for injecting large-dose (more than or equal to 50ml) liquid medicine, and the mechanical infusion pump for injecting small-dose (less than or equal to 50ml) has the problems of unstable injection action, incapability of realizing dosage adjustment and the like, and brings inconvenience for use.

Disclosure of Invention

The invention aims to provide an adjustable small-dose injection pump, which solves the technical problem that the existing injection pump in the prior art is inconvenient to use; the invention provides a plurality of technical effects which can be generated by the optimized technical scheme in the technical schemes; see below for details.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention provides an adjustable small-dose injection pump, which comprises a dose continuous pushing component and an injection component, wherein: the continuous dose pushing assembly comprises a pushing barrel component, a piston component and an elastic pushing component, a buffer cavity is arranged in the pushing barrel component, buffer liquid is contained in the buffer cavity, the piston component is arranged in the pushing barrel component in a sliding mode, the volume of the buffer cavity can be changed by the sliding of the piston component, and the piston component is connected with the elastic pushing component; the injection assembly is connected to the piston member.

Preferably, the adjustable bolus pump comprises a dose sizing adjustment assembly, wherein: the dose gear-fixing adjusting assembly is connected with the piston member and can adjust the relative position of the piston member relative to the pushing barrel member so as to enable the elastic pushing member to deform, and the deformed elastic pushing member can drive the piston member to slide.

Preferably, the buffer cavity is communicated with a liquid storage cavity through a pipeline, and the liquid storage cavity is used for storing buffer liquid; the pipeline includes main liquid pipe, the buffer chamber with the stock solution chamber passes through main liquid pipe is linked together, be provided with the check valve on the main liquid pipe, the water conservancy diversion direction of check valve is followed the stock solution chamber extremely the buffer chamber, main liquid pipe on with the parallelly connected branch liquid pipe that is provided with of check valve, the internal diameter of branch liquid pipe is less than main liquid pipe's internal diameter.

Preferably, the piston member is in sliding fit with the wall of the inner cavity of the pushing cylinder member so as to divide the inner cavity of the pushing cylinder member into the buffer cavity and the liquid storage cavity.

Preferably, the pushing end of the piston member is arranged in the pushing cylinder member, and the connecting end of the piston member is provided with a pushing connecting piece; the dose setting and adjusting assembly and the injection assembly are both connected with the pushing connecting piece.

Preferably, the dose stop adjustment assembly comprises a dial member connected to the push connector.

Preferably, the injection assembly is removably connected to the push connection.

Preferably, the adjustable small-dose bolus pump comprises a base on which the continuous dose pushing assembly, the dose sizing adjustment assembly and the injection assembly are disposed.

Preferably, an installation cavity is arranged in the base, and the dose continuous pushing assembly is arranged in the installation cavity; the base is provided with a mounting seat, and the injection assembly is detachably mounted on the mounting seat.

Preferably, the base is provided with a dose scale for assisting the dose dial adjustment assembly in adjusting the injection amount.

The adjustable small-dose injection pump provided by the invention at least has the following beneficial effects:

the adjustable small-dose injection pump comprises a dose continuous pushing assembly and an injection assembly, the dose continuous pushing assembly comprises a pushing barrel component, a piston component and an elastic pushing component, a buffer cavity is arranged inside the pushing barrel component, buffer solution is contained in the buffer cavity, the piston component is arranged in the pushing barrel component in a sliding mode, the piston component is connected with the elastic pushing component, in the pushing process, the elastic pushing component provides pushing force, hydraulic pressure of the buffer solution inside the buffer cavity is overcome to do work, continuous pushing action is achieved, when force is balanced, pushing action is stopped, injection is completed, the dose continuous pushing assembly enables the injection assembly to continuously and stably push action, and a precondition is provided for guaranteeing injection effect.

The injection assembly is connected with the piston member, before injection, the piston member is driven to slide through external force, so that the elastic pushing member deforms, pushing force for injecting liquid medicine is provided, during injection, injection of quantitative liquid medicine is completed through the injection assembly, the adjustment operation is convenient and fast, and the injection effect is obvious.

The invention adopts a mechanical injection mode, does not need an external power supply, can complete continuous and stable pushing action only through the dose continuous pushing assembly, is convenient and fast to use and operate and has obvious injection effect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIGS. 1 and 2 are schematic structural views of an embodiment of the elastic pushing member of the invention in a buffer cavity;

FIG. 3 is a schematic view of the base-containing structure of the present invention;

FIG. 4 is a schematic structural view of an embodiment of the present invention in which the elastic pushing member is located in the liquid storage cavity;

FIG. 5 is a schematic structural view of an embodiment of the present invention in which the resilient pushing member is located outside the push tube member;

FIG. 6 is a schematic structural view of an embodiment of the present invention having a reservoir;

FIG. 7 is a schematic structural view of another embodiment of a base-containing structure of the present invention.

Reference numerals

1. A dose continuous pushing assembly; 11. a push barrel member; 12. a piston member; 13. an elastic pushing member; 14. pushing the connecting piece; 2. a dose setting adjustment assembly; 21. a toggle piece; 3. an injection assembly; 4. a buffer chamber; 5. a liquid storage cavity; 6. a pipeline; 61. a main liquid pipe; 62. a one-way valve; 63. a branch liquid pipe; 7. a base; 71. dose graduations.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

Example 1:

the present invention provides an adjustable small-dose bolus pump, as shown with reference to fig. 1 and 2, comprising a dose continuous pushing assembly 1, a dose setting adjustment assembly 2 and an injection assembly 3.

The continuous propelling movement subassembly 1 of dose includes propelling movement section of thick bamboo component 11, piston component 12 and elasticity propelling movement component 13, and elasticity propelling movement component 13 sets up to the spring, and propelling movement section of thick bamboo component 11 is inside to be provided with cushion chamber 4, and the inside buffer solution that has held of cushion chamber 4, buffer solution is hydraulic oil, and piston component 12 slides and sets up in propelling movement section of thick bamboo component 11, and piston component 12 slides and can change the volume of cushion chamber 4 to make hydraulic oil flow in or flow out cushion chamber 4, piston component 12 links to each other with elasticity propelling movement component 13.

The dosing and dosing adjustment assembly 2 is connected to the piston member 12 and is capable of adjusting the relative position of the piston member 12 with respect to the pusher member 11 such that the resilient pusher member 13 is deformed, the deformed resilient pusher member 13 being capable of driving the piston member 12 to slide.

The injection assembly 3 is connected to the piston member 12.

Before the injection, confirm the injection volume of treating the injection liquid medicine according to patient's demand, inhale through injection subassembly 3 and treat the injection liquid medicine, later adjust piston member 12 to corresponding position through dose level adjusting part 2, at this in-process, elasticity propelling movement component 13 takes place deformation, produces the propelling movement power, and hydraulic oil flows into to the cushion chamber 4 in.

During the injection, release dose level adjusting part 2, piston member 12 is under the effect of propelling force, and the hydraulic pressure of overcoming the inside hydraulic oil of cushion chamber 4 lasts, stable slip to cushion chamber 4 direction, and hydraulic oil flows out cushion chamber 4, and injection subassembly 3 lasts, stable injecting, and when 11 internal balance of a propelling movement section of thick bamboo component, injection subassembly 3 just accomplishes the injection of liquid medicine.

The invention adopts a mechanical injection mode, can realize continuous and stable pushing action only through the dose continuous pushing component 1, can flexibly adjust the injection quantity required by a patient through the dose gear setting adjusting component 2, and has convenient and fast whole injection operation and remarkable injection efficiency.

Example 2

Example 2 is based on example 1:

as shown in figure 2, the buffer cavity 4 is communicated with the liquid storage cavity 5 through a pipeline, the liquid storage cavity 5 is used for containing hydraulic oil, and in the injection process, the hydraulic oil can flow back and forth between the buffer cavity 4 and the liquid storage cavity 5, so that the buffer liquid can be reused.

Alternatively, as shown in fig. 2, the pipe line 6 includes a main liquid pipe 61, and both ends of the main liquid pipe 61 are connected to the first communication hole and the second communication hole, respectively.

The main liquid pipe 61 is provided with a check valve 62, and the direction of the check valve 62 is from the liquid storage cavity 5 to the buffer cavity 4; a branch pipe 63 is provided in parallel with the check valve 62 on the main pipe 61, and the inner diameter of the branch pipe 63 is smaller than that of the main pipe 61.

During adjustment of the relative position of the piston member 12 by the dosing adjustment assembly 2, said hydraulic oil mainly flows through the non-return valve 62 and, during injection, through the branch 63, which on the one hand facilitates the adjustment of the relative position of the piston member 12 and on the other hand restricts the flow area by the branch 63 having a smaller diameter, so that the injection is more continuous and stable.

As an alternative embodiment, the pushing cylinder member 11 is configured to be cylindrical, the piston member 12 is slidably fitted to a cavity wall of an inner cavity of the pushing cylinder member 11, the piston member 12 divides the inner cavity of the pushing cylinder member 11 into the buffer cavity 4 and the liquid storage cavity 5, and a first communication hole and a second communication hole are respectively formed at two ends of the pushing cylinder member 11 and are communicated with the buffer cavity 4 and the liquid storage cavity 5, and the first communication hole and the second communication hole are communicated through the pipeline 6 outside the pushing cylinder member 11.

In a normal state, the elastic pushing member 13 is in an undeformed state, the inside of the pushing barrel member 11 is balanced, and at the moment, the injection assembly 3 is in a completely compressed state, and no liquid medicine is in the interior.

Before injection, the balance in the pushing barrel component 11 is broken through the dosage and gear adjusting component 2, so that the piston component 12 slides along the pushing barrel component 11, and the elastic pushing component 13 deforms.

During injection, the dose gear-fixing adjusting assembly 2 is released, the elastic pushing component 13 pushes the piston component 12 to reversely slide until the interior of the piston component returns to a balanced state again, and during the injection process, due to the existence of hydraulic pressure of hydraulic oil, the sliding of the piston component 12 is continuous and stable, so that the injection effect is effectively guaranteed.

As an alternative embodiment, as shown in fig. 2, the piston member 12 comprises a piston body disposed in the pusher member 11, the piston body forming the pushing end of the piston member 12, and a piston rod, the end of the piston rod remote from the piston body forming the connecting end of the piston member 12, the connecting end being provided with the pushing connection 14.

The push connection 14 is provided as a push rod having two ends connected to the dose setting adjustment assembly 2 and the injection assembly 3, respectively.

The push connector 14 connects the piston member 12, the dosing assembly 2 and the injection assembly 3 together in such a way that they can act in synchronism.

As an alternative embodiment, as shown in fig. 2, the dose setting adjustment assembly 2 comprises a dial 21, the dial 21 is provided as a dial, and the dial 21 is connected with the push connector 14; can drive piston member 12 through stirring and slide, elasticity propelling movement component 13 deformation, simple structure, the simple operation.

As an alternative embodiment, as shown in fig. 2, the injection assembly 3 comprises a syringe and an injection piston, the end of the piston rod of which is detachably connected with the push connection 14; the injection assembly 3 can be disassembled and assembled.

In the actual injection process, the injection assembly 3 with the corresponding specification can be selected and installed according to the difference of the patient on the type, the dosage and the like of the liquid medicine.

Alternatively, the connection of injection assembly 3 to pusher connector 14 may be by snap fit, bayonet fitting, or the like.

As an alternative embodiment, as shown in fig. 3, the adjustable small-dose bolus pump includes a base 7, the continuous dose pushing assembly 1, the dose setting adjustment assembly 2 and the injection assembly 3 are all disposed on the base 7, and the base 7 is used for mounting and supporting the device, so that the whole device is more compact and firm.

As an optional implementation manner, as shown in fig. 3, an installation cavity is provided in the base 7, the dosage continuous pushing component 1 is provided in the installation cavity, and the dosage continuous pushing component 1 contains hydraulic oil, so that the dosage continuous pushing component 1 is installed inside the base 7, the dosage continuous pushing component 1 can be effectively protected, and the service life of the device is prolonged.

As an alternative embodiment, as shown in fig. 3, the base 7 is provided with a mounting seat on which the syringe of the injection assembly 3 is removably mounted.

The injection tube with the injection piston all adopts and can dismantle the connection, and the installation is firm on the one hand, guarantees the stationarity of injection process, and on the other hand dismouting is convenient, the change and the clearance of the different specification injection unit 3 of being convenient for.

The base 7 is provided with a slideway communicated with the installation cavity, and the pushing connecting piece 14 is in sliding fit with the slideway.

As an alternative embodiment, as shown in fig. 3, a dose scale 71 is disposed on the base 7 at a position corresponding to the edge of the sliding slot where the dial slides, and the dose scale 71 is used to assist the dose setting adjustment assembly 2 in adjusting the injection amount during the injection process.

As an alternative embodiment, a handle is provided on the base 7 for being held by a human hand, and the handle is matched with a mechanical injection structure, is not limited by the external environment, and has excellent portability.

The embodiment is mainly suitable for injecting the liquid medicine with the injection amount of less than 50ml, so that the stirring operation is not influenced while the embodiment has the characteristics of compact structure, small volume, light weight, convenient carrying and the like.

Example 3

Example 3 is based on example 2:

as shown in fig. 2, an elastic push member 13 is provided in the buffer chamber 4, and both ends thereof are connected to the push cylinder member 11 and the piston member 12, respectively.

The elastic pushing member 13 of this embodiment is mainly subjected to tensile deformation, and the pushing force thereof is a pulling force.

Example 4

Example 4 is based on example 2:

as shown in fig. 4, the elastic pushing member 13 is disposed in the reservoir 5, and both ends thereof are connected to the pushing cylinder member 11 and the piston member 12, respectively.

The elastic pushing member 13 of this embodiment is mainly subjected to compression deformation, and its pushing force is a pushing force.

Example 5

Example 5 is based on example 2:

as shown in fig. 5, the elastic pushing member 13 is disposed outside the pushing cylinder member 11, and is sleeved on the piston rod of the piston member 12, and two ends of the elastic pushing member are respectively connected to the pushing cylinder member 11 and the pushing connector 14.

The elastic pushing member 13 of this embodiment mainly generates tensile deformation, the pushing force is pulling force, and the elastic pushing member 13 is located at the outer side, which is convenient for maintenance and replacement of the component.

Example 6

Example 6 differs from example 2 in that:

as shown in fig. 6 and 7, the adjustable small-dose bolus pump comprises an oil storage tank, a liquid storage cavity 5 is arranged in the oil storage tank, and the second communication hole is arranged on the oil storage tank.

In the description of the present application, it is to be understood that the terms "upper", "lower", "inner", "outer", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. An adjustable bolus pump comprising a dose continuous pushing assembly and an injection assembly, wherein:

the continuous dose pushing assembly comprises a pushing barrel component, a piston component and an elastic pushing component, a buffer cavity is arranged in the pushing barrel component, buffer liquid is contained in the buffer cavity, the piston component is arranged in the pushing barrel component in a sliding mode, the volume of the buffer cavity can be changed by the sliding of the piston component, and the piston component is connected with the elastic pushing component;

the injection assembly is connected to the piston member.

2. The adjustable bolus pump of claim 1, comprising a dose sizing adjustment assembly, wherein:

the dose gear-fixing adjusting assembly is connected with the piston member and can adjust the relative position of the piston member relative to the pushing barrel member so as to enable the elastic pushing member to deform, and the deformed elastic pushing member can drive the piston member to slide.

3. The adjustable bolus pump of claim 1 wherein the buffer chamber is in communication with a reservoir chamber via tubing, the reservoir chamber being for storage of a buffer fluid;

the pipeline includes main liquid pipe, the buffer chamber with the stock solution chamber passes through main liquid pipe is linked together, be provided with the check valve on the main liquid pipe, the water conservancy diversion direction of check valve is followed the stock solution chamber extremely the buffer chamber, main liquid pipe on with the parallelly connected branch liquid pipe that is provided with of check valve, the internal diameter of branch liquid pipe is less than main liquid pipe's internal diameter.

4. The adjustable bolus pump of claim 3 wherein the piston member is in sliding engagement with a wall of the inner chamber of the pusher barrel member to divide the inner chamber of the pusher barrel member into the buffer chamber and the reservoir chamber.

5. The adjustable bolus pump of claim 2 wherein the push end of the piston member is disposed within the push barrel member, the connecting end of the piston member being provided with a push connector;

the dose setting and adjusting assembly and the injection assembly are both connected with the pushing connecting piece.

6. The adjustable bolus pump of claim 5 wherein the dose setting adjustment assembly includes a dial member coupled to the push connector.

7. The adjustable bolus pump of claim 5, wherein the syringe assembly is removably coupled to the push coupler.

8. The adjustable bolus pump of claim 1, comprising a base on which the continuous dose pushing assembly, the dosing and sizing assembly, and the injection assembly are disposed.

9. The adjustable bolus pump of claim 8, wherein a mounting cavity is provided within the base, the constant bolus dose assembly being disposed within the mounting cavity;

the base is provided with a mounting seat, and the injection assembly is detachably mounted on the mounting seat.

10. The adjustable bolus pump of claim 8 wherein the base has a dose scale disposed thereon for assisting the dose setting adjustment assembly in adjusting the injection volume.