CN114652383A - Hand-held liquid quantitative distribution device - Google Patents

Abstract

The invention relates to a hand-held liquid quantitative distribution device, comprising a hand-held peristaltic pump and a container of liquid to be dispensed. The hand-held peristaltic pump comprises a manual drive part, a pump head and a distribution pipe, one end of the distribution pipe is connected to the The container is connected, and the other end passes through the pump head; the pump head includes a rotating part for squeezing the distribution pipe, and the manual driving part is drivingly connected with the rotating part for driving the rotating part Rotation to dose the liquid in the container through the dispensing tube.

Description

A handheld liquid quantitative distribution device

technical field

The invention relates to the technical field of medical devices, in particular to a handheld liquid quantitative distribution device.

Background technique

Varicose veins of the lower extremities are common diseases in vascular surgery, which refer to vascular diseases characterized by dilated lesions due to venous return obstruction caused by the insufficiency of the superficial venous valves of the lower extremities. A healthy venous valve will help the normal return of venous blood. However, once the venous valve expands or its function becomes weak, the blood will flow back to the lower extremity veins, increasing the pressure in the lower extremity veins, which will become tortuous, dilated, and form varicose veins.

The main risk factors associated with varicose veins are prolonged standing, prolonged sitting, increasing age, obesity, pregnancy, etc., and are also affected by genetic inheritance. According to statistics, the incidence of varicose veins in the lower extremity is about 15%-30% worldwide. It is estimated that there are 1.1 billion varicose veins in males aged 40-80 and 2.2 billion in females worldwide. Timely and effective intervention will seriously affect the quality of life in the later stage.

The main methods currently used for the treatment of varicose veins of the lower extremities are surgical treatment (high ligation and stripping of the great saphenous vein), thermal ablation (laser ablation and radiofrequency ablation), foam sclerotherapy and the latest cyanoacrylate treatment. The traditional high ligation and stripping of the great saphenous vein requires anesthesia and has a large wound surface. Laser ablation and radiofrequency ablation have good closure rates, but have potential thermal risks and are expensive. Foam sclerotherapy is a noninvasive treatment modality, but has a high recurrence rate. All of the above treatments require the patient to wear compression stockings after surgery.

The latest cyanoacrylate treatment method is to use cyanoacrylate adhesive to align the diseased vein, promote the fibrosis of the wall tissue to lead to the permanent closure of the diseased vein, with high closure rate and low recurrence rate. During treatment, the volume of adhesive entering the diseased vein needs to be controlled to prevent adverse effects from delivering multiple doses of adhesive. At present, most of the delivery devices for passive quantitative distribution of liquid on the market are dispenser guns, that is, guns with handles that can be braked. First, the liquid is aspirated by the syringe and assembled with the dispenser gun, and the syringe plunger is abutted against the pawl plunger. The detent plunger is actuated distally by the handle trigger, thereby pushing the syringe plunger to complete liquid dispensing, wherein the dosing of the liquid dispensing is controlled by the detent plunger. However, many recent adverse events have shown that the dispensing device with this structure cannot effectively and reliably deliver the liquid quantitatively.

SUMMARY OF THE INVENTION

In order to solve the above problems, the present invention provides a hand-held liquid quantitative dispensing device, comprising a hand-held peristaltic pump and a container of liquid to be dispensed, the hand-held peristaltic pump comprising a manual drive part, a pump head and a dispensing tube, the One end of the distribution pipe is connected with the container, and the other end passes through the pump head;

The pump head includes a rotating part for squeezing the dispensing pipe, the manual driving part is drivingly connected with the rotating part, and is used for driving the rotating part to rotate so as to pass the liquid in the container through the dispensing pipe. Pipes are delivered quantitatively.

Preferably, the hand-held peristaltic pump is in the form of a pistol.

Preferably, the rotating part comprises a turntable, and the turntable is rotatably arranged in the pump casing of the pump head through a rotating shaft;

A plurality of pressing rollers for pressing the distribution pipe are arranged on one side of the turntable at an even interval, and a plurality of the pressing rollers are equidistantly arranged around the outer circumference of the rotating shaft.

Preferably, an arc-shaped pressure roller wall is protruded from an inner side wall of the pump housing, and the pressure roller wall and the pressure roller press the distribution pipe.

Preferably, the manual driving part includes a trigger, a trigger buckle and a ratchet mechanism, and the ratchet mechanism is arranged on the other side of the turntable; the ratchet mechanism includes a ratchet wheel and a non-return pawl, and the ratchet wheel is connected to the other side of the turntable. The turntable is coaxially and fixedly connected; the non-return pawl is rotatably arranged on the turntable;

The trigger is movably connected with the pump housing, one end of the trigger buckle is fixedly connected with the trigger, and the other end is pressed against the ratchet, and the trigger is pushed through the trigger buckle. Ratchet spins.

Preferably, a stopper is fixed in the pump casing, a stopper is provided on the stopper, and the stopper is connected to the trigger through a return spring.

Preferably, the distribution tube is connected to a delivery catheter into the human body through a luer connector.

Preferably, the container is a collapsible container made of a non-rigid polymer material.

Preferably, the container is a screw-top bottle, the bottle mouth is provided with an external thread, one end of the dispensing tube is connected with a connecting cap, and the connecting cap is provided with an internal thread that fits with the external thread of the screw-top bottle. thread, and the connecting cap is threadedly connected with the screw bottle.

Preferably, the distribution tube is elastic.

Compared with the prior art, the present invention has the following technical effects:

1. The handheld liquid quantitative distribution device of the present invention can more reliably transport liquid by means of a peristaltic pump, with high repeatability and stability, and can quantitatively distribute and transport liquid more reliably and conveniently;

2. The hand-held liquid quantitative distribution device of the present invention, by selecting the material of the distribution pipe, more preferably fluorine rubber or silicone rubber, satisfies the elastic requirements, and at the same time has good compatibility with the liquid, preventing the transmission of liquid. Pollution;

3. The handheld liquid quantitative distribution device of the present invention does not need to use a syringe to suck liquid during the use process, and the operation is more convenient.

Of course, it is not necessary for any product embodying the present invention to achieve all of the above-described advantages simultaneously.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained from these drawings without any creative effort. In the attached picture:

1 is an internal front view of a handheld liquid quantitative dispensing device provided by a preferred embodiment of the present invention;

FIG. 2 is an internal rear view of the handheld liquid metering dispensing device provided by the preferred embodiment of the present invention.

Detailed ways

The invention provides a handheld liquid quantitative distribution device, which mainly distributes liquid products (such as low-viscosity dilute solutions or high-viscosity adhesives, etc.) quantitatively to designated parts of the human body through a peristaltic pump.

In the present invention, the hand-held liquid quantitative dispensing device comprises a hand-held peristaltic pump and a container for the liquid to be dispensed, the hand-held peristaltic pump comprises a manual drive part, a pump head and a dispensing tube, one end of the dispensing tube is connected to the The container is connected, and the other end passes through the pump head;

The pump head includes a rotating part for squeezing the dispensing pipe, the manual driving part is drivingly connected with the rotating part, and is used for driving the rotating part to rotate so as to pass the liquid in the container through the dispensing pipe. Pipes are delivered quantitatively.

Since the hand-held peristaltic pump belongs to the mature technology in the field, the present invention does not specifically limit the hand-held peristaltic pump, and all technical solutions for quantitatively transporting liquid through the hand-held peristaltic pump belong to the protection scope of the present invention. Therefore, The present invention does not specifically limit the manual drive part and the pump head. The following will be described in detail with reference to a specific embodiment. This embodiment is implemented on the premise of the technical solution of the present invention, and provides a detailed implementation manner and a specific operation process, but the protection scope of the present invention is not limited to Limited to the following embodiments, those skilled in the art can modify and modify the present invention within the scope of not changing the spirit and content of the present invention.

Please refer to FIG. 1 and FIG. 2. In this embodiment, the handheld liquid quantitative distribution device is used to treat varicose veins of the lower extremities. During the treatment process, the adhesive is quantitatively delivered to the diseased vein through a peristaltic pump, so as to control the entry of the adhesive. Adhesive volume in diseased veins. Of course, the handheld liquid quantitative distribution device provided by the present invention can also be used in other medical operations, which is not limited by the present invention. Specifically, the device includes a hand-held peristaltic pump and a dispensed liquid container 1:

The hand-held peristaltic pump is a pistol type, which includes a manual drive part, a pump head and a distribution pipe 7, the pump head includes a pump housing 14 and a rotating part, and the rotating part includes a turntable 4, and the turntable 4 is rotated and arranged on the pump housing through a rotating shaft 6. within 14.

One side of the turntable 4 is evenly spaced with a number of pressing wheels 5 for squeezing the distribution pipe 7, and a plurality of the pressing wheels 5 are arranged around the outer circumference of the rotating shaft 6 at equal distances, that is, these several The center of each pressing roller 5 forms a circle, and the center of the circle is on the axis of the rotating shaft 6 .

An arc-shaped pressure roller wall 3 is protruded on an inner side wall of the pump housing 14, and a section of the distribution pipe 7 is located between the arc-shaped pressure roller wall 3 and the pressure roller 5, and the pressure roller wall 3 is connected to the pressure roller. 5. Squeeze the distribution tube 7.

The manual drive part includes a trigger 10, a trigger buckle 9 and a ratchet mechanism, and the ratchet mechanism is arranged on the other side of the turntable 4 (the pressure wheel 5 and the ratchet mechanism are respectively located on both sides of the turntable 4); the ratchet wheel The mechanism includes a ratchet wheel 16 and a non-return pawl 15. The ratchet wheel 16 is coaxially and fixedly connected to the turntable 4;

The trigger 10 is movably connected with the pump housing 14, one end of the trigger buckle 9 is fixedly connected with the trigger 10, and the other end is pressed against the ratchet teeth 17 of the gear 16, and the trigger 10 is pressed, the trigger 10 pushes the ratchet 16 to rotate through the trigger catch 9 .

A limiter 11 is fixed in the pump housing 14 , and a limiter 12 is arranged on the limiter 11 , and the limiter 12 is connected to the trigger 10 through a return spring 13 .

In this embodiment, the end of the distribution pipe 7 connected to the container 1 is defined as the proximal end of the distribution pipe 7 , and the end of the distribution pipe 7 away from the container 1 is defined as the distal end of the distribution pipe 7 .

In this embodiment, the turntable 4 moves in a circular motion with the rotating shaft 6 as the axis. Since the pressure roller 5 and the turntable 4 are relatively fixed (the fixing method can be welding, bonding, etc.), the pressure roller 5 moves along with the turntable 4 at an angular velocity. The same circular motion squeezes the distribution tube 7 with the pinch roller wall 3, creating a partial vacuum, thereby moving the liquid distally.

In this embodiment, the distal end of the distribution tube 7 is connected with a luer connector 8 for connecting a delivery catheter into the human body.

The container 1 is a collapsible container made of a non-rigid polymer material for storing liquid. In this embodiment, a screw-top bottle is used as an example, and the bottle mouth is provided with an external thread. The proximal end of the distribution tube 7 is connected with the connection cap 2, the connection cap 2 is provided with an inner thread adapted to the outer thread of the screw bottle, and the connection cap 2 is threadedly connected with the screw bottle. The manufacturing material of this screw bottle is mainly HDPE (High Density Polyethylene).

For the handheld liquid quantitative distribution device of the present invention, the distribution pipe 7 is in direct contact with the liquid, and should have good compatibility, extremely low adsorption, not easy to age, and good air tightness. At the same time, the distribution pipe 7 should have a certain elasticity, that is, the shape can be quickly restored after being radially compressed, and the preferred material of the distribution pipe 7 is silicone rubber, fluorine rubber, etc.

In this embodiment, when the trigger 10 is actuated once, the trigger 10 moves in the right direction in FIG. 1 and finally abuts against the limit post 12 , while the trigger catch 9 moves the same distance in the right direction in FIG. 1 . The trigger buckle 9 is initially in contact with the roots of the ratchet teeth 17 of the ratchet wheel 16, and the movement of the trigger buckle 9 applies a force to the left side (right direction in Figure 1 ) of the ratchet tooth 17 in the horizontal direction in FIG. 2 to drive the ratchet wheel. 16 moves clockwise in FIG. 2 . In this embodiment, the ratchet wheel 16 has a total of 12 ratchet teeth 17 , so the movement angle of the ratchet wheel 16 for a single time is 30°.

The non-return pawl 15 moves with the pawl shaft 18 as the axis. When the ratchet wheel 16 moves clockwise in FIG. 2 , the non-return pawl 15 slides on a certain tooth back of the ratchet tooth 17 . When the ratchet wheel 16 rotates 30°, the non-return pawl 15 is in contact with the next ratchet tooth 17 . To prevent the ratchet 16 from moving counterclockwise in FIG. 2 .

The trigger 10 stops moving after abutting against the limit post 12, and forces the return spring 13 to be in a compressed state. When the trigger 10 is released, under the action of the elastic potential energy of the return spring 13, the trigger 10 is reset (moves in the right direction in FIG. 2) to the initial position, and the trigger catch 9 slides on the back of the ratchet teeth 17 and then resets to the original position. The initial position and offset with the next ratchet 17 to support the next trigger 10 activation.

The movement power of the turntable 4 is provided by the ratchet 16 . The turntable 4 and the ratchet wheel 16 are relatively fixed, and the rotary shaft 6 is used as the axis to perform a circular motion with the same angular velocity, and each time rotates 30°. The pressure wheel 5 then squeezes a section of the distribution pipe 7 with the pressure wheel wall 3, and a partial vacuum is formed at the distal end of the distribution pipe 7, so that the liquid is transported from the screw bottle to the distal end of the distribution pipe 7 for a fixed distance, that is, a single time. Trigger 10 is actuated to deliver a metered amount of fluid. Since the turntable 4 and the ratchet wheel 16 are restricted by the non-return pawl 15, they cannot rotate counterclockwise in FIG. 2, that is, the dispensing device can prevent the liquid from flowing backward.

In a preferred embodiment, as the trigger 10 is actuated again, the pressure wheel 5 continues to squeeze the distribution tube 7, and the pressure point on the distribution tube 7 moves from the proximal end to the distal end. Due to the resilience of the distribution tube 7, the pipeline at the proximal end of the distribution tube 7 naturally rebounds with the movement of the pressing wheel 5, and the liquid moves to the distal end accordingly, so that the liquid is continuously delivered to the distal end with a single fixed distribution volume. .

For the handheld liquid quantitative dispensing device of the present invention, the volume of the liquid to be quantitatively dispensed depends on the volume of the partial vacuum formed, which is related to the inner diameter of the dispensing tube 7 and the angle at which the pressure wheel 5 is moved by a single pull of the trigger 10, The radius of the pressure roller 5 is related. When other conditions are the same, the smaller the inner diameter of the distribution pipe 7, the smaller the angle of the movement of the pressing wheel 5 caused by pulling the trigger 10 once, and the smaller the radius of the pressing wheel 5, the smaller the volume of liquid to be dispensed in a single time. These three parameters are optimally designed to achieve the target single-dispensing volume.

Claims (10)

1. A hand-held liquid quantitative dispensing device is characterized by comprising a hand-held peristaltic pump and a container for the dispensed liquid, wherein the hand-held peristaltic pump comprises a manual driving part, a pump head and a dispensing pipe, one end of the dispensing pipe is connected with the container, and the other end of the dispensing pipe penetrates through the pump head;

the pump head is including being used for the extrusion the rotating part of distributing pipe, manual drive portion with the rotating part drive is connected, is used for the drive the rotating part is rotatory in order to with liquid in the container passes through the distributing pipe ration is sent out.

2. A hand-held liquid dosing device according to claim 1 wherein the hand-held peristaltic pump is of the pistol type.

3. A hand-held liquid dosing device according to claim 1, wherein the rotatable portion comprises a rotatable disc rotatably disposed within the pump housing of the pump head by a rotatable shaft;

a plurality of pinch rollers used for extruding the distribution pipe are uniformly arranged on one side face of the rotary table at intervals, and the pinch rollers are arranged on the periphery of the rotary shaft in a winding mode at equal intervals.

4. A hand-held liquid dosing device as claimed in claim 3 wherein an inner side wall of the pump housing has an arcuate pinch roller wall projecting therefrom, the pinch roller wall and pinch roller squeezing the dispensing tube.

5. A hand-held liquid dosing device according to claim 3 wherein the manual actuation means comprises a trigger, a trigger catch and a ratchet mechanism, the ratchet mechanism being provided on the other side of the dial; the ratchet mechanism comprises a ratchet wheel and a non-return pawl, and the ratchet wheel is coaxially and fixedly connected with the rotary disc; the non-return pawl is rotationally arranged on the rotary disc;

the trigger is movably connected with the pump shell, one end of the trigger buckle is fixedly connected with the trigger, the other end of the trigger buckle is abutted against the ratchet, the trigger is pressed, and the trigger pushes the ratchet to rotate through the trigger buckle.

6. A hand-held liquid dispensing device according to claim 5 wherein a stop is mounted within the pump housing, the stop having a stop post thereon, the stop post being connected to the trigger by a return spring.

7. A hand-held liquid dosing device as claimed in claim 1 wherein the dispensing tube is connected to the delivery conduit into the body by a luer fitting.

8. A hand-held liquid dosing device according to claim 1 wherein the container is a collapsible container of non-rigid polymeric material.

9. A hand-held liquid dosing device according to claim 1 wherein the container is a screw top bottle, the mouth of which is provided with external threads, one end of the dispensing tube being connected to a connecting cap, the connecting cap being provided with internal threads adapted to the external threads of the screw top bottle, the connecting cap being in threaded connection with the screw top bottle.

10. A hand-held liquid dosing device according to claim 1 wherein the dispensing tube is resilient.

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