WO2022198908A1

WO2022198908A1 - Liquid extraction device and liquid extraction method

Info

Publication number: WO2022198908A1
Application number: PCT/CN2021/113564
Authority: WO
Inventors: 何俊
Original assignee: 武汉佰美斯医疗科技有限公司
Priority date: 2021-03-25
Filing date: 2021-08-19
Publication date: 2022-09-29

Abstract

Provided are a liquid extraction device and a liquid extraction method. The liquid extraction device comprises a fixing member, a pressing member and a needle assembly, wherein the fixing member is provided with a mounting position used for mounting an encapsulation tube; the pressing member can be moved between a first position close to the fixing member and a second position away from the fixing member; the pressing member and the fixing member clamp the encapsulation tube when in the first position; the pressing member and the fixing member unclamp the encapsulation tube when in the second position; the needle assembly comprises a needle base and a liquid extraction needle; the liquid extraction needle is arranged on the needle base; the portions of the needle base and the fixing member that are close to the mounting position have a connection state and a separation state; and when in the connection state, the tip of the liquid extraction needle extends into the mounting position, and when in the separation state, the tip of the liquid extraction needle is away from the mounting position. By means of the present invention, it can be ensured that the liquid extraction needle is reliably inserted into the encapsulation tube, and a liquid extraction operation can be realized under the action of pressing. In addition, the liquid extraction device is easy to operate, has a high liquid extraction success rate, does not easily leave surplus liquid, and can effectively prevent contact contamination from occurring during liquid extraction.

Description

A kind of liquid taking out device and liquid taking method

CROSS-REFERENCE TO RELATED APPLICATIONS

This application requires the application number 202110316919.1 submitted on March 25, 2021, the name of the invention is "a liquid extraction device", the application number submitted on March 25, 2021 is 202110322731.8, the name of the invention is "a pipeline package" Liquid Removal Method" and the priority of the Chinese patent application No. 202110910424.1 filed on August 9, 2021 and entitled "A Liquid Removal Device", which are incorporated herein by reference in their entirety.

technical field

The invention relates to the technical field of liquid taking tools, in particular to a liquid taking out device and a liquid taking method.

Background technique

At present, in industry or other fields, for the packaging of liquid, a tubular packaging structure is usually adopted, so as to encapsulate the liquid in a section of packaging tube. For example, some industrial glues, some reagents used in biochemical experiments, etc. will use this tubular packaging method. The tubular packaging method can realize quantitative packaging of the required liquid, which is convenient for taking the whole tube, and can solve the problem of inconvenient operation in dosage control.

Tubular encapsulation of liquids is widely used in the medical field. In one of the application examples, when donating blood, the blood station will sample and preserve the blood of the blood donor, and the preserved sample will be packaged in a section of blood cylindrical catheter by hot melt. The blood pairing operation between the packaged blood sample and the patient who needs blood transfusion is one of the indispensable and important steps before clinical blood transfusion treatment. In another application example, for an existing treatment method for bioremediation of severe dry eye syndrome with autologous serum extracted from whole blood, this treatment method uses autologous serum, which is produced in Afterwards, it is also packaged in a section of blood cylindrical catheter by hot melt. When using, the autologous serum needs to be taken out, and then the eye drop treatment is performed.

However, the above-mentioned tubular packaging method has certain difficulties in taking out the liquid. Currently, encapsulated liquids are typically dispensed manually. In practice, scissors or sharp tools are used to cut or puncture the cylindrical catheter, and then the liquid is squeezed out manually. This manual operation method is not only inconvenient to operate, but also when a tool is used to cut or puncture the cylindrical catheter, the liquid in the cylindrical catheter is likely to flow out during the puncturing process, and there is a safety risk of contact pollution.

SUMMARY OF THE INVENTION

The present invention provides a liquid taking out device and a liquid taking method, which are used to solve the problems of inconvenient operation and easy contact pollution when taking liquid from the packaged liquid at present.

The invention provides a liquid extraction device, comprising: a fixing member, a pressing member and a needle assembly; the fixing member is provided with a mounting position, and the mounting position is used for installing a packaging tube; the pressing member can be close to the fixing member moving between a first position of the piece and a second position away from the fixing piece; in the first position, the pressing piece and the fixing piece clamp the packaging tube; at the second position , the pressing member and the fixing member release the clamping of the packaging tube; the needle assembly includes a needle seat and a liquid-taking needle; the liquid-taking needle is arranged on the needle seat; the needle seat and the The part of the fixing member close to the installation position has a connection state and a separation state; in the connection state, the needle of the liquid taking needle extends into the installation position; in the separation state, the liquid taking needle The needle is away from the mounting position.

According to a liquid extraction device provided by the present invention, a detachable connection structure is provided between the fixing member and the needle seat; in the connection state, the needle seat and the fixing member are close to the installation position The parts are connected by the detachable connecting structure.

According to a liquid extraction device provided by the present invention, the detachable connection structure includes a clip structure; the clip structure includes a clip slot and a clip that are adapted to each other; the clip slot and the clip are arranged separately on the fixing member and the needle seat.

According to the liquid extraction device provided by the present invention, the latching groove is provided on the fixing member, and the latching is provided on the needle seat.

According to the liquid take-out device provided by the present invention, the pressing member and the needle assembly are disposed on opposite sides of the fixing member along a first direction.

According to a liquid take-out device provided by the present invention, the installation position is an installation groove provided on the fixing member, and the installation groove is provided with a needle-penetrating hole near the groove wall of the needle assembly, and the needle-penetrating hole is used for for the needle of the liquid collection needle to pass through.

According to the liquid taking-out device provided by the present invention, the bottom of the installation groove is provided with a pipe-penetrating hole, and the pipe-penetrating hole is used for the packaging pipe to pass through.

According to a liquid take-out device provided by the present invention, the fixing member is in the shape of a strip; the installation position is arranged at the first end of the fixing member, the second end of the fixing member extends along the second direction, and the The second direction is perpendicular to the first direction.

A liquid extraction device provided according to the present invention further comprises: an elastic pulling plate; one end of the elastic pulling plate is connected with the first end of the fixing member, and the other end of the elastic pulling plate is connected with the needle seat ; the elastic pulling plate is used to drive the needle seat away from the fixing member; and/or, it further comprises: a connecting plate; the connecting plate and the pressing member are respectively arranged at the position of the fixing member along the first direction On the opposite side, the first end of the connecting plate is connected with the needle seat, the second end of the connecting plate and the fixing member are connected by a first connecting part; the connecting plate is connected with the first At least one of the parts is an elastic member.

According to a liquid extraction device provided by the present invention, when the liquid extraction device is provided with the elastic pulling plate and the connecting plate, the other end of the elastic pulling plate and the first end of the connecting plate They are located on opposite sides of the needle base along the second direction; or, in the case that the liquid extraction device is provided with the connecting plate, the second end of the connecting plate passes through the middle of the fixing member. The first connecting portion is connected, or, the second end of the connecting plate and the second end of the fixing member are connected through the first connecting portion.

According to a liquid extraction device provided by the present invention, the pressing member is in the shape of a strip; the first end of the pressing member is close to the first end of the fixing member; the second end of the pressing member is close to the fixing member The second end is connected to the fixing member through a second connecting portion; at least one of the pressing member and the second connecting portion is an elastic member.

According to a liquid extraction device provided by the present invention, the second end of the pressing member is connected to the middle portion of the fixing member through the second connecting portion, or the second end of the pressing member is connected to the fixing member through the second connecting portion. The second end is connected by the second connecting part; and/or, in the case where the pressing member is a rigid member and the second connecting part is an elastic member, from the second end of the fixing member to the first In the extension direction of one end, the distance between the pressing member and the fixing member gradually increases.

According to a liquid extraction device provided by the present invention, when the second connecting portion is an elastic member, at least one groove is provided on the second connecting portion.

According to the liquid extraction device provided by the present invention, at least one of the fixing member and the pressing member is provided with a hollow groove.

According to a liquid extraction device provided by the present invention, a side surface of the fixing member away from the needle seat is provided with concave-convex patterns; and/or a side surface of the needle holder away from the fixing member is provided with concave-convex patterns; and /or, a side surface of the pressing member away from the fixing member is provided with concave-convex patterns.

According to a liquid take-out device provided by the present invention, the material of the liquid take-out device is polypropylene, polyethylene, polyoxymethylene resin, polyamide, high-density polyethylene, acrylonitrile-butadiene-styrene copolymer and polyamide At least one of ethylene terephthalate or polypropylene, polyethylene, polyoxymethylene resin, polyamide, high density polyethylene, acrylonitrile-butadiene-styrene copolymer and polyethylene terephthalate Modified material of at least one of glycol esters.

The present invention also provides a liquid taking method of the above-mentioned liquid taking out device, comprising: installing one end of the packaging tube in the installation position, and placing the other part of the packaging tube in the clamping area between the pressing member and the fixing member; The needle seat and the part of the fixing part close to the installation position are assembled and connected, so that the needle of the liquid-taking needle extends into the installation position and is inserted into the packaging tube; the pressing part is switched from the second position away from the fixing part to being close to the fixing part. In the first position, to squeeze the packaged tube in the clamping area, the liquid in the packaged tube is squeezed out from the liquid sampling needle.

The present invention provides a device for taking out liquid and a method for taking liquid. By arranging a fixing member, a pressing member and a needle assembly, when taking the liquid encapsulated in the packaging tube, one end of the packaging tube can be installed at the installation position first, and the packaging tube can be sealed. The other parts of the tube are placed in the clamping area between the pressing piece and the fixing piece; then, the needle seat and the fixing piece near the installation position are assembled in a connected state, so that the needle of the liquid-taking needle extends into the installation position, and Insert into the packaging tube; finally, switch the pressing member from the second position away from the fixing member to the first position close to the fixing member, so as to squeeze the packaging tube in the clamping area, and remove the liquid in the packaging tube from the liquid sampling needle. extrude.

It can be seen that the present invention can ensure that the liquid-taking needle is reliably inserted into the packaging tube, and realize the liquid-taking operation under the action of squeezing. Contact contamination in the liquid.

Description of drawings

In order to explain the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are the For some embodiments of the invention, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is one of the structural representations of the liquid take-out device provided by the present invention;

Fig. 2 is the partial enlarged schematic diagram of K place in Fig. 1 provided by the present invention;

Fig. 3 is the second structural schematic diagram of the liquid take-out device provided by the present invention;

Fig. 4 is the third structural schematic diagram of the liquid take-out device provided by the present invention;

Fig. 5 is the schematic flow sheet of the liquid taking method based on the liquid taking out device provided by the present invention;

Reference number:

1: Pressing piece; 2: Fixing piece; 3: Needle assembly;

4: Clip structure; 5: Elastic pull plate; 6: Connection plate;

7: The first connecting part; 8: The second connecting part; 9: The hollow slot;

10: Concave-convex pattern; 21: Installation slot; 22: Needle hole;

23: piercing hole; 31: needle seat; 32: liquid-taking needle;

41: Card slot; 42: Buckle; 81: Groove.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention. , not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

A liquid extraction device and a liquid extraction method of the present invention will be described below with reference to FIGS. 1 to 5 .

As shown in FIG. 1 to FIG. 4 , this embodiment provides a liquid extraction device, including: a fixing member 2 , a pressing member 1 and a needle assembly 3 ; the fixing member 2 is provided with an installation position, and the installation position is used for installing the packaging tube; The pressing member 1 can move between a first position close to the fixing member 2 and a second position away from the fixing member 2; in the first position, the pressing member 1 and the fixing member 2 form a clamping for the packaging tube; in the second position, The pressing member 1 and the fixing member 2 release the clamping of the packaging tube; the needle assembly 3 includes a needle seat 31 and a liquid-taking needle 32; the liquid-taking needle 32 is arranged on the needle seat 31; It has a connected state and a disconnected state; in the connected state, the needle head of the liquid taking needle 32 extends into the installation position; in the disconnected state, the needle head of the liquid taking needle 32 is away from the installation position.

Specifically, in this embodiment, by arranging the fixing member 2 , the pressing member 1 and the needle assembly 3 , when taking the liquid packaged in the packaging tube, one end of the packaging tube can be installed at the installation position first, and the other parts of the packaging tube can be installed at the installation position. in the clamping area between the pressing member 1 and the fixing member 2; then, assemble the needle holder 31 and the fixing member 2 close to the installation position in a connected state, so that the needle of the liquid-taking needle 32 extends into the installation position, and Insert into the packaging tube; finally, switch the pressing member 1 from the second position away from the fixing member 2 to the first position close to the fixing member 2, so as to squeeze the packaging tube in the clamping area and remove the liquid in the packaging tube from the The liquid-taking needle 32 is extruded.

It can be seen that the liquid taking-out device shown in this embodiment can ensure that the liquid-taking needle 32 is reliably inserted into the packaging tube, and realizes the liquid-taking operation under the action of squeezing, which is not only convenient to operate, but also has a high success rate of liquid-taking, and is not easy to cause In addition, during the process of removing the liquid, the operator does not need to hold the liquid collection needle, nor does the operator need to install the liquid collection needle on the needle seat, and the operator's hand does not come into contact with the liquid collection needle at all. It can effectively prevent contact pollution during liquid extraction, and greatly improve operational safety.

It should be pointed out here that the liquid extraction device shown in this embodiment is suitable for extracting liquid from a cylindrical packaging tube encapsulated with liquid, and the liquid may be blood samples, serum, industrial glue, biological reagents known in the art etc., which are not specifically limited.

For the needle assembly 3 shown in this embodiment, the liquid-taking needle 32 can be detachably mounted on the needle seat 31, or the liquid-taking needle 32 can be fixed on the needle seat 31, which is not specifically limited. Here, in this embodiment, the liquid collection needle 32 and the needle seat 31 are preferably integrally formed by injection molding.

In order to remove the liquid in the prior art, in addition to manual operation, two needles are used to pierce both ends of the packaging tube, and then air is blown into one end to press the liquid out. This liquid extraction method is a targeted design to realize the full extrusion of the liquid in consideration of the problems of inconvenient operation and difficulty in ensuring the complete extrusion of the liquid in the existing manual extrusion method. In theory, as long as the double-sided puncture of the packaged tube can be achieved, when air is blown from one side of the packaged tube, the liquid can be completely pressed out from the needle on the other side of the packaged tube by the air pressure.

However, in actual use, it is found that such a liquid extraction method has major problems. Firstly, the piercing operation is inconvenient, and secondly, for some liquids, the liquid is forced out by blowing air, which inevitably causes the encapsulated liquid to come into contact with the outside air, causing pollution. For example, for biologically active liquids such as serum repair fluid, external contamination will cause problems such as protein inactivation, which will lead to contamination of the liquid during operation and reduce its quality. Finally, in the actual use of the above-mentioned liquid extraction method, in order to ensure that the needle will not detach and leak after piercing the packaging tube, and to ensure sealing, the needle will penetrate to a certain depth. At this time, the liquid in the part of the needle hole and the pierced end of the packaging tube cannot be taken out, which will cause waste of liquid to a certain extent and cannot be taken out completely.

Through research, it is found that although the existing liquid packaging will consider the use loss, there will generally be a margin, and the liquid packaged in the packaging tube is generally used for one-time use. and cannot be used again. However, this part of the encapsulation margin is small. If the method of double-sided piercing is adopted, once the piercing depth is not properly controlled, it is easy to cause the amount of residual liquid to exceed the encapsulation margin, resulting in insufficient liquid extraction.

Based on this, this embodiment does not consider the liquid taking method that can take out the liquid as completely as possible by blowing gas, and designs the liquid taking out device shown in this embodiment from the perspective of safety and operation success rate. Here, the present embodiment adopts a liquid-taking needle in the form of a single needle, and uses a mechanical extrusion method similar to traditional manual liquid-taking to take out the liquid. The success rate of the operation is greatly improved, and the contact time between the liquid and the outside world is shortened as much as possible, which effectively ensures the safety of liquid extraction and avoids contact pollution during liquid extraction.

Preferably, in order to improve the convenience of taking the liquid and ensure that the needle of the liquid taking needle 32 is always inserted into the packaging tube during the liquid taking process, a detachable connection structure is provided between the fixing member 2 and the needle seat 31 in this embodiment. . In this way, when the fixing member 2 and the needle seat 31 are in a connected state, the needle seat 31 and the position of the fixing member 2 close to the installation position are connected by a detachable connection structure, so as to ensure that the needle of the liquid taking needle 32 is pierced into the position inside the packaging tube remain unchanged, thereby increasing the success rate of liquid extraction.

As shown in FIG. 2 , in order to ensure the convenience of the connection between the needle seat 31 and the fixing member 2 , the detachable connection structure shown in this embodiment is preferably a snap-fit structure 4 ; the snap-fit structure 4 includes a snap-fit slot 41 . and the buckle 42 ; the slot 41 and the buckle 42 are respectively arranged on the fixing member 2 and the needle seat 31 .

As shown in FIG. 1 to FIG. 4 , the locking groove 41 shown in this embodiment is provided on the fixing member 2 , and the locking buckle 42 is provided on the needle seat 31 . Of course, if the arrangement space allows, in this embodiment, the card slot 41 can also be arranged on the needle holder 31 , and the buckle 42 can be arranged on the fixing member 2 .

As shown in FIG. 1 to FIG. 4 , in order to facilitate the liquid taking operation, in this embodiment, the pressing member 1 and the needle assembly 3 are respectively arranged on opposite sides of the fixing member 2 along the first direction.

Further, in order to reliably fix the packaging tube when taking the liquid, the installation position shown in this embodiment is the installation groove 21 provided in the fixing member 2, and the shape of the notch of the installation groove 21 is adapted to the shape of the packaging tube. . A needle-penetrating hole 22 is provided on the groove wall of the installation groove 21 close to the needle assembly 3 , and the needle-penetrating hole 22 is used for the needle of the liquid-taking needle 32 to pass through.

At the same time, in this embodiment, a pipe-penetrating hole 23 is provided at the bottom of the installation groove 21 , and the pipe-penetrating hole 23 is used for the packaging pipe to pass through.

In this way, before the actual liquid taking operation, the packaging tube can be clamped into the installation groove 21, and one end of the packaging tube can be passed through the tube through hole 23, so as to realize the reliable fixation of the packaging tube.

Further, based on the optimized design of the installation groove 21 , the needle-piercing hole 22 and the tube-piercing hole 23 , this implementation can ensure that the needle of the liquid-taking needle 32 can be reliably fixed to the packaging tube while being targeted from the packaging tube. The tube body is pierced, avoiding the hot-melt end on the packaging tube, which improves the success rate of piercing the liquid-taking needle 32, thereby correspondingly improving the success rate of liquid-taking.

When the liquid taking operation is performed, the needle of the liquid taking needle 32 is pierced into the packaging tube provided in the installation groove 21 under the guidance of the needle piercing hole 22 until the clamping groove 41 and the buckle 42 are in the clamping state, which ensures the extraction of the liquid. The position where the liquid needle 32 is pierced remains unchanged, which can prevent the operator's hand from accidentally touching the needle of the liquid taking needle 32, effectively avoid contact pollution, and greatly improve the operation safety.

As shown in FIG. 1 , the fixing member 2 shown in this embodiment is in the shape of a strip; the installation position is arranged at the first end of the fixing member 2 , and the second end of the fixing member 2 extends along the second direction, and the second direction is the same as the first end of the fixing member 2 . Orientation is vertical. Wherein, the fixing member 2 shown in this embodiment may be a strip-shaped fixing block or a fixing plate, which is not specifically limited herein.

Further, this embodiment is provided with an elastic pull plate 5 on the one hand; one end of the elastic pull plate 5 is connected with the first end of the fixing member 2, and the other end of the elastic pull plate 5 is connected with the needle seat 31; the elastic pull plate 5 is used for To drive the needle seat 31 away from the fixing member 2 .

At the same time, this embodiment is also provided with a connecting plate 6 on the other hand; the connecting plate 6 and the pressing member 1 are respectively arranged on the opposite side of the fixing member 2 along the first direction, and the first end of the connecting plate 6 is connected with the needle seat 31 , the second end of the connecting plate 6 and the fixing member 2 are connected by a first connecting part 7; at least one of the connecting plate 6 and the first connecting part 7 is an elastic member.

Here, in this embodiment, the elastic pulling plate 5 can be provided separately, the connecting plate 6 can also be arranged separately, and the elastic pulling plate 5 and the connecting plate 6 can also be provided together.

Before performing the liquid extraction operation on the packaging tube, this embodiment is based on the structural design of the elastic pulling plate 5, the connecting plate 6 and the first connecting part 7, which can ensure that the fixing member 2 and the needle seat 31 are in a separated state, so as to avoid installing the packaging tube. When the liquid sampling needle 32 pierces the packaging tube, or brings installation risks to the installer.

Correspondingly, after the liquid extraction operation is performed on the packaging tube, when the buckle 42 is detached from the clamping slot 41 , the present embodiment can automatically separate the fixing member 2 from the needle seat 31 based on the elastic force of the elastic pulling plate 5 . Also, under the action of the connecting plate 6 and/or the first connecting portion 7, the fixing member 2 can be automatically separated from the needle seat 31 to ensure that the needle of the liquid-taking needle 32 leaves the packaging tube.

As shown in FIG. 1 and FIG. 3 , the liquid extraction device shown in this embodiment is provided with an elastic pulling plate 5 and a connecting plate 6 at the same time, so that this embodiment realizes the integrated design of the fixing member 2 and the needle seat 31 at the same time. The automatic separation of the fixing member 2 and the needle seat 31 can also be realized under the assistance of at least one of the elastic pulling plate 5 , the connecting plate 6 and the first connecting portion 7 .

As shown in FIG. 4 , in this embodiment, the elastic pulling plate 5 and the connecting plate 6 are not provided between the fixing member 2 and the needle seat 31 . In this way, in this embodiment, after the liquid sampling operation is completed on the packaging tube, the operator can manually separate the fixing member 2 from the needle seat 31 .

As shown in FIG. 1 and FIG. 3 , in order to optimize the arrangement structure of the liquid extraction device, in this embodiment, when the liquid extraction device is provided with an elastic pulling plate 5 and a connecting plate 6 , the other end of the elastic pulling plate 5 is connected to the connecting plate. The first ends of 6 are located on opposite sides of the needle hub 31 along the second direction.

At the same time, the present embodiment can also optimize the design of the installation form of the connecting plate 6 in the case that the liquid extraction device is provided with the connecting plate 6 according to actual requirements. For example, in this embodiment, the second end of the connecting plate 6 and the middle of the fixing member 2 can be connected through the first connecting portion 7 , and the second end of the connecting plate 6 and the second end of the fixing member 2 can also be connected in this embodiment. The first connection portion 7 is connected, which is not specifically limited here.

Further, in order to facilitate the clamping operation of the packaging tube, the pressing member 1 shown in this embodiment is designed in a strip shape; the first end of the pressing member 1 is close to the first end of the fixing member 2; the second end of the pressing member 1 The end is close to the second end of the fixing member 2, and is connected with the fixing member 2 through the second connecting portion 8; at least one of the pressing member 1 and the second connecting portion 8 is an elastic member.

Specifically, in the case where both the fixing member 2 and the pressing member 1 are designed in strips, a strip-shaped clamping area is formed between the fixing member 2 and the pressing member 1 shown in this embodiment, which is a reliable way to form a reliable sealing area for the packaging tube. At the same time of clamping, it is also convenient to perform a squeezing operation on the packaged tube, so as to completely squeeze out the liquid packaged in the packaged tube.

At the same time, in this embodiment, at least one of the pressing member 1 and the second connecting portion 8 is an elastic member, and before performing the pressing operation on the packaging tube, the pressing member 1 is in a second position away from the fixing member 2, so that The packaging tube is arranged in the above-mentioned clamping area, and the pressing member 1 performs the pressing operation on the packaging tube; correspondingly, after the pressing operation is performed on the packaging tube, the pressing member 1 can automatically move from the position close to the fixing member 2 under the action of the elastic force. The first position is moved to a second position away from the fixing member 2 .

Here, in this embodiment, the opposite end faces of the fixing member 2 and the pressing member 1 can be designed to match the shape, so as to ensure that when the pressing member 1 is pressed, the fixing member 2 and the pressing member 1 can completely seal the liquid in the packaging tube as much as possible. extrusion.

Wherein, without affecting the extrusion operation of the packaging tube, in this embodiment, a positioning structure adapted to the packaging tube may be provided on the opposite end faces of the fixing member 2 and the pressing member 1. For example, the positioning structure may be a rib, The rib on the fixing member 2 extends along the length direction of the fixing member 2 , and the rib on the pressing member 1 extends along the length direction of the pressing member 1 .

In this way, this embodiment is based on the design of the positioning structure, which can effectively prevent the packaging tube from sliding or twisting in the clamping area between the fixing member 2 and the pressing member 1 when the packaging tube is squeezed, resulting in the inability of the liquid in the packaging tube. Extrude a lot. In this embodiment, the positioning structure can limit the position of the packaging tube, so as to ensure that the packaging tube can be limited in the clamping area during extrusion. At the same time, arranging convex ribs can ensure complete extrusion, and ensure that the liquid in the packaging tube can be completely squeezed out as much as possible.

In one embodiment, when the second connecting portion 8 is an elastic member, the second connecting portion 8 shown in this embodiment is provided with at least one groove 81 . Here, by designing the grooves 81 in this embodiment, it can ensure that the second connecting part 8 can better complete the bending deformation, so as to avoid stress accumulation on the second connecting part 8 , which will affect the deformation performance and the deformation performance of the second connecting part 8 . service life. At the same time, based on the design of the groove 81 in this embodiment, material collapse can also be avoided when the second connecting portion 8 is injection-molded.

At the same time, the present embodiment can optimize the design of the installation form of the pressing member 1 on the fixing member 2 according to actual requirements. As shown in FIG. 1 , the second end of the pressing member 1 shown in this embodiment is connected with the second end of the fixing member 2 through the second connecting portion 8 . In this case, since the second end of the connecting plate 6 shown in this embodiment is integrally connected with the second end of the fixing member 2, this embodiment can realize the liquid taking operation for a relatively long packaging tube, and ensure that The overall aesthetics and operability of the liquid dispensing device.

As shown in FIG. 3 and FIG. 4 , in this embodiment, the second end of the pressing member 1 and the middle portion of the fixing member 2 can also be connected through a second connecting portion 8 . In this way, this embodiment also ensures the aesthetics and operability of the liquid taking device on the basis of ensuring the liquid taking performance of the liquid taking device.

As shown in FIG. 1 , FIG. 3 and FIG. 4 , in this embodiment, when the pressing member 1 is a rigid member and the second connecting portion 8 is an elastic member, the extension from the second end of the fixing member 2 to the first end is In the direction, the distance between the pressing member 1 and the fixing member 2 gradually increases.

Specifically, in this embodiment, the pressing member 1 can be designed in an arc shape. During the actual installation of the packaging tube, since the head end of the packaging tube is installed at the installation position, the tail end of the packaging tube extends along the second direction and is close to the second connecting portion 8 , so that the pressing member 1 and the fixing member 2 are connected to the pressing member 1 and the fixing member 2 . The optimized design, when the pressing member 1 is pressed, the second end of the pressing member 1 will first approach the fixing member 2, and the first end of the pressing member 1 will be close to the fixing member 2, so that the pressing member 1 can follow the packaging tube. From the tail end to the head end, squeeze the packaging tube gradually to ensure that all the liquid in the packaging tube is taken out and avoid liquid residue.

As shown in Figure 1, Figure 3 and Figure 4, in order to ensure the yield of injection molding, avoid material collapse during injection molding, and realize the lightweight design of the liquid extraction device, the fixing member 2 and the pressing member 1 shown in this embodiment are shown in this embodiment. At least one of them is provided with a hollow slot 9 .

The hollow grooves 9 on the fixing member 2 shown in this embodiment are arranged in sequence along the extending direction of the fixing member 2, and the cross-sectional shape of the hollow grooves 9 on the fixing member 2 may be triangular. The hollow grooves 9 on the pressing member 1 shown in this embodiment are arranged in sequence along the extending direction of the pressing member 1 , and the cross-sectional shape of the hollow grooves 9 on the pressing member 1 may be circular or bar-shaped.

At the same time, in order to facilitate the operator to hold the liquid extraction device stably during the liquid extraction operation, in this embodiment, a concave-convex pattern 10 is provided on the side of the fixing member 2 away from the needle seat 31; and/or, in this embodiment, the needle A side surface of the seat 31 away from the fixing member 2 is provided with a concave-convex pattern 10 ; and/or, in this embodiment, a side surface of the pressing member 1 away from the fixing member 2 is provided with a concave-convex pattern 10 . Obviously, the design of the concave-convex pattern 10 shown in this embodiment is beneficial for the operator to prevent slipping during operation.

Further, the material of the liquid extraction device shown in this embodiment is polypropylene (Polypropylene, PP), polyethylene (polyethylene, PE), polyoxymethylene (Polyoxymethylene, POM), polyamide (Polyamide, PA), high density At least one of polyethylene (High Density Polyethylene, HDPE), acrylonitrile-butadiene-styrene copolymer (Acrylonitrile Butadiene Styrene plastic, ABS plastic) and polyethylene terephthalate (Polyethylene terephthalate, PET) or a modified material of at least one of the above materials.

At the same time, the liquid extraction device shown in this embodiment can be processed and manufactured by means of injection molding, which simplifies the manufacturing process and reduces the production difficulty and production cost. In the actual preparation process, in this embodiment, materials with similar physical properties can be mixed in proportion, for example, PP plastic can be mixed with PE plastic, ABS plastic can also be mixed with POM plastic, of course, there are other mixing forms. This is not listed one by one.

As shown in Figure 5, the present embodiment also provides a liquid taking method of the above-mentioned liquid taking out device, comprising the steps:

In step 510, one end of the packaging tube is installed at the installation position, and the other part of the packaging tube is placed in the clamping area between the pressing member and the fixing member.

Here, in this embodiment, the head end of the packaging tube can be clamped in the installation groove, and the end of the head end of the packaging tube can be passed through the tube through hole, so as to realize the reliable fixation of the packaging tube. Then, ensure that the packaging tube is arranged in the clamping area along the extending direction of the fixing member, so that when the pressing member is pressed, the packaging tube is gradually pressed from the tail end to the head end of the packaging tube.

Step 520 , assemble the needle holder and the part of the fixing member close to the installation position in a connected state, so that the needle of the liquid taking needle extends into the installation position and is inserted into the packaging tube.

Here, in this embodiment, the buckle is clamped to the slot, so that the needle seat and the fixing member remain connected, and the needle of the liquid-taking needle passes through the needle hole and penetrates from the tube body of the packaging tube to the packaging tube. inside the tube. Based on the positioning function of the buckle and the groove, this embodiment can ensure that the position of the needle of the liquid-taking needle in the packaging tube remains unchanged during liquid-taking.

In step 530, the pressing member is switched from a second position away from the fixing member to a first position close to the fixing member, so as to squeeze the packaging tube in the clamping area and squeeze the liquid in the packaging tube from the liquid sampling needle.

Here, after the liquid extraction operation is completed, in the case that the liquid extraction device is a reusable product, the clamping state of the buckle and the clamping groove is first released, and the fixing member and the needle seat are connected to the elastic pulling plate, the connecting plate and the first Automatic separation under the elastic assistance of at least one of the connecting parts, and then taking out the packaged tube that has completed liquid extraction, and sterilizing the liquid extraction device for next use.

Since the liquid taking method shown in this embodiment adopts the structure of the above-mentioned liquid taking-out device, the liquid taking method shown in this embodiment includes all the technical solutions of the above-mentioned embodiments, and therefore, at least has all the technical solutions of the above-mentioned embodiments. All the beneficial effects brought about will not be repeated here.

It should be pointed out here that, in order to ensure that the liquid in the packaging tube is completely taken out, after the extrusion operation of the packaging tube is completed, the packaging tube can be observed first. At one end of the liquid-taking needle, shake the liquid take-out device, so that the residual liquid in the packaging tube can be thrown to the head end of the packaging tube under the action of centrifugal force. The residual liquid is completely squeezed out.

Now the liquid taking method shown in the present embodiment is respectively compared with a kind of split type U-shaped liquid take-out device with publication number CN211855949U and a kind of straight-tube pipeline liquid take-out device and liquid take-out method with publication number CN110742804A. Wherein, the above two publications both adopt the method of piercing the packaging tube on both sides, and perform the liquid taking operation by the method of blowing air in one side and squeezing.

In the experiment, a No. 4 needle was selected, and the liquid taking method shown in this example and the existing two patented technologies were respectively used to take liquid from 100 encapsulated tubes packed with liquid, and the success rate of puncturing was calculated. The success rate of penetration using the two existing patented technologies is about 70%, while the success rate of penetration using the liquid collection method shown in this embodiment is over 95%. It can be seen that the liquid collection method shown in this embodiment is obvious. superior to the existing technology.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be The technical solutions described in the foregoing embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

A liquid take-out device, characterized in that it includes:

a fixing piece, the fixing piece is provided with an installation position, and the installation position is used for installing the packaging tube;

a pressing member, the pressing member can move between a first position close to the fixing member and a second position away from the fixing member; in the first position, the pressing member and the fixing member are opposite each other the packaging tube is clamped; in the second position, the pressing member and the fixing member release the clamping of the packaging tube;

Needle head assembly; the needle head assembly includes: a needle seat and a liquid-taking needle; the liquid-taking needle is arranged on the needle seat; the needle seat and the part of the fixing member close to the installation position are in a connected state and a separated state ; In the connected state, the needle of the liquid-taking needle extends into the installation position; in the disconnected state, the needle of the liquid-taking needle is away from the installation position.
The liquid extraction device according to claim 1, wherein:

A detachable connection structure is provided between the fixing member and the needle seat; in the connection state, the needle seat and the position of the fixing member close to the installation position are connected by the detachable connection structure .
The liquid extraction device according to claim 2, wherein:

The detachable connection structure includes a clip structure; the clip structure includes a clip slot and a clip which are adapted to each other; the clip slot and the clip are separately arranged on the fixing member and the needle seat.
The liquid extraction device according to claim 3, wherein:

The card slot is arranged on the fixing piece, and the buckle is arranged on the needle seat.
The liquid extraction device according to any one of claims 1 to 4, wherein:

The pressing member and the needle assembly are respectively disposed on opposite sides of the fixing member along the first direction.
The liquid extraction device according to claim 5, wherein:

The installation position is an installation groove provided on the fixing member, and a needle penetration hole is provided in the installation groove near the groove wall of the needle assembly, and the needle penetration hole is used for the needle of the liquid taking needle to pass through. .
The liquid extraction device according to claim 6, wherein:

The bottom of the installation groove is provided with a pipe-through hole, and the pipe-through hole is used for the packaging pipe to pass through.
The liquid extraction device according to claim 5, wherein:

The fixing member is in the shape of a strip; the installation position is arranged at the first end of the fixing member, and the second end of the fixing member extends along a second direction, and the second direction is perpendicular to the first direction.
The liquid extraction device according to claim 8, wherein:

It also includes: an elastic pulling plate; one end of the elastic pulling plate is connected with the first end of the fixing member, and the other end of the elastic pulling plate is connected with the needle seat; the elastic pulling plate is used to drive the The needle seat is far away from the fixing member;

and/or, further comprising: a connecting plate; the connecting plate and the pressing member are respectively disposed on opposite sides of the fixing member along the first direction, the first end of the connecting plate is connected with the needle seat, the The second end of the connecting plate and the fixing member are connected by a first connecting part; at least one of the connecting plate and the first connecting part is an elastic member.
The liquid extraction device according to claim 9, wherein:

When the liquid extraction device is provided with the elastic pulling plate and the connecting plate, the other end of the elastic pulling plate and the first end of the connecting plate are separated from the needle along the second direction. the opposite side of the seat;

Alternatively, in the case where the liquid extraction device is provided with the connecting plate, the second end of the connecting plate and the middle part of the fixing member are connected through the first connecting part, or the first connecting plate The two ends are connected with the second end of the fixing member through the first connecting portion.
The liquid extraction device according to claim 8, wherein:

The pressing piece is in the shape of a strip; the first end of the pressing piece is close to the first end of the fixing piece; the second end of the pressing piece is close to the second end of the fixing piece, and passes through the second connecting part connected with the fixing member; at least one of the pressing member and the second connecting portion is an elastic member.
The liquid extraction device according to claim 11, wherein:

The second end of the pressing member and the middle portion of the fixing member are connected through the second connecting portion, or the second end of the pressing member and the second end of the fixing member are connected through the second connecting portion ;

And/or, when the pressing member is a rigid member and the second connecting portion is an elastic member, in the extending direction from the second end to the first end of the fixing member, the pressing member and the The spacing between the fixing pieces gradually increases.
The liquid extraction device according to claim 11, wherein:

When the second connecting portion is an elastic member, at least one groove is provided on the second connecting portion.
The liquid extraction device according to any one of claims 1 to 4, wherein:

At least one of the fixing member and the pressing member is provided with a hollow slot.
The liquid extraction device according to any one of claims 1 to 4, wherein:

A side surface of the fixing member away from the needle seat is provided with concave-convex patterns;

And/or, a side surface of the needle seat away from the fixing member is provided with concave-convex patterns;

And/or, a side surface of the pressing member away from the fixing member is provided with concave-convex patterns.
The liquid extraction device according to any one of claims 1 to 4, wherein:

The material of the liquid extraction device is at least one of polypropylene, polyethylene, polyoxymethylene resin, polyamide, high-density polyethylene, acrylonitrile-butadiene-styrene copolymer and polyethylene terephthalate. One, or at least one of polypropylene, polyethylene, polyoxymethylene resin, polyamide, high-density polyethylene, acrylonitrile-butadiene-styrene copolymer and polyethylene terephthalate Modified material.
A liquid taking method of a liquid taking out device according to any one of claims 1 to 16, characterized in that, comprising:

One end of the packaging tube is installed in the installation position, and the other part of the packaging tube is placed in the clamping area between the pressing part and the fixing part;

Assemble the needle seat and the part of the fixing part close to the installation position in a connected state, so that the needle of the liquid taking needle extends into the installation position and is inserted into the packaging tube;

The pressing member is switched from a second position away from the fixing member to a first position close to the fixing member, so as to squeeze the packaged tube in the clamping area and squeeze the liquid in the packaged tube from the liquid sampling needle.