An injection device

Abstract

The application relates to the technical field of medical devices, in particular to an injection device which comprises a first injector main body, at least one injector branch pipe, one end of which is communicated with the side wall of the first injector main body, and the other end of which is provided with a second sealing element, a first sealing element which is detachably connected to one end of the first injector main body, and a liquid pushing rod assembly which is slidably connected in the inner cavity of the first injector main body through the other end of the first injector main body, and the sealing length of the first liquid pushing rod assembly covers the communicating position of the injector branch pipe and the first injector main body, so that the technical problem that the existing collection pipe is inconvenient for multiple purification operations on the antigen of a test strip, the purification efficiency is low, the operation process is easy to cause pollution, and the final detection result is affected is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to an injection device. BACKGROUND

[0002] Antigen detection is a common medical detection method. Antigen detection is usually performed by using a test strip. However, a large number of instruments are required for antigen detection. How to simply, efficiently and quickly detect and improve production capacity has become a difficult problem for enterprises and technical personnel to solve. At present, most of the test strips on the market use a sampling tube for collection. The existing collection tube usually includes a tube body. One end of the tube body is closed, and the other end is open. One end of the collection tube opening is sealed by a tube cap. Before mixing and purifying the sampling sample, only one type of release agent is stored in one collection tube at a time. The collection tube needs to be purchased additionally for collection. Special personnel are also needed to collect the antigen. The collected test strip antigen needs to be released and purified in the laboratory. During the purification process, the tube cap of the collection tube needs to be opened. Different release agents are sequentially added by the operator, and the test is performed after multiple purification processes. Therefore, the existing collection tube is not convenient for multiple purification operations of the test strip antigen. The purification efficiency is low, and the operation process is easy to cause pollution, which affects the final detection result. SUMMARY

[0003] The present application provides an injection device, which solves the technical problem that the existing collection tube is not convenient for multiple purification operations of the test strip antigen, the purification efficiency is low, and the operation process is easy to cause pollution, which affects the final detection result.

[0004] Therefore, the present application provides an injection device, which comprises:

[0005] a first syringe body;

[0006] at least one syringe branch pipe, one end of which is in communication with the side wall of the first syringe body, and the other end of which is provided with a second sealing member;

[0007] a first sealing member, which is detachably connected to one end of the first syringe body;

[0008] a first liquid pushing rod assembly, one end of which is sealingly and slidingly connected to the inner cavity of the first syringe body through the other end of the first syringe body; and the sealing length of the first liquid pushing rod assembly covers the communication position of the syringe branch pipe and the first syringe body.

[0009] Optionally, the first liquid pushing rod assembly comprises a first liquid pushing rod and a first liquid pushing plug.

[0010] The first liquid pushing plug is sealingly and slidingly connected to the inner cavity of the first syringe body, and the sealing length of the first liquid pushing plug covers the communication position of the syringe branch pipe and the first syringe body.

[0011] One end of the first liquid pushing rod extends into the inner cavity of the first syringe body and is connected with the first liquid pushing plug, and the other end is provided with a first handle part.

[0012] Optionally, the first sealing part comprises an open end, a sealing end and a first sealing film, the open end is detachably connected with the first syringe body, and the first sealing film is sealingly connected between the open end and the sealing end; the sealing end is adapted to be connected with a puncture tube.

[0013] Optionally, a first limiting flange is arranged on the inner cavity of the first sealing part, a sealing ring is connected on the inner ring of the first limiting flange, and the sealing ring is in interference fit with the inner cavity of the first syringe body;

[0014] And / or, the first sealing film is a metal film sealed by heat sealing;

[0015] And / or, the inner side of the open end is threadedly connected with the side wall of the first syringe body;

[0016] And / or, the injection device further comprises:

[0017] A liquid outlet head matched with the first sealing part, one end of which is detachably connected with the sealing end of the first sealing part and is provided with a first puncture connector for communicating with the inner cavity of the first syringe body;

[0018] An injection needle arranged at the other end of the liquid outlet head and in communication with the first puncture connector.

[0019] Optionally, the number of the syringe branch pipes is two, and they are respectively symmetrically arranged on the two side walls of the first syringe body.

[0020] Optionally, a second limiting flange is arranged on the inner cavity of the first syringe body in the circumferential direction;

[0021] The second limiting flange is arranged between the communication part of the syringe branch pipe and the first syringe body and the first sealing part, so as to limit the sliding length of the first liquid pushing rod assembly in the inner cavity of the first syringe body.

[0022] Optionally, further comprising:

[0023] A puncture interface arranged on the side wall of the first syringe body and located between the second limiting flange and the first sealing part;

[0024] A second puncture connector arranged in the puncture interface and in communication with the inner cavity of the first syringe body;

[0025] A second syringe body, one end of which is sealed by a second sealing film;

[0026] a second liquid pushing rod assembly, one end of which is sealingly connected in the inner cavity of the second injector body through the other end of the second injector body;

[0027] Wherein, the puncture interface has a sealing state of detachably connecting a third sealing member at one end away from the first injector body, and an injection state of connecting with one end of the second injector body, and the second puncture joint punctures the second sealing membrane.

[0028] Optionally, a limiting assembly is further included, which is detachably connected with one end of the second injector body away from the second sealing membrane, for limiting the movement of the second liquid pushing rod assembly.

[0029] Optionally, the limiting assembly includes a first protective sleeve, which is respectively provided with a first clamping groove for clamping with the second injector body and a second clamping groove for clamping with the second liquid pushing rod assembly.

[0030] Optionally, the first injector body and the injector branch pipe are integrally injection molded.

[0031] The technical scheme of the present application has the following advantages:

[0032] The present application first moves one end of the first liquid pushing rod assembly to the communication position of the injector branch pipe and the first injector body before sample collection, blocks the end of the injector branch pipe through the first liquid pushing rod assembly, avoids the communication between the injector branch pipe and the first injector body, then detaches the second sealing member to put the release agent to be mixed and purified into the injector branch pipe, seals the injector branch pipe through the second sealing member, then puts another release agent into the first injector body after opening the first sealing member, and then puts the test strip after sample collection into the first injector body to mix with the release agent in the first injector body to dilute and purify the test strip to obtain purified liquid, then moves the first liquid pushing rod assembly away from the first sealing member to make the injector branch pipe communicate with the first injector body, and the release agent in the injector branch pipe flows into the first injector body and mixes with the purified liquid to purify again to obtain mixed liquid, then moves the first liquid pushing rod assembly towards the mixed liquid to inject the purified mixed liquid into the detection equipment for detection, which is convenient and convenient. The injection device provided by the present application can easily realize multiple purification operations, without the need for multiple transfer and purification operations after sample collection, reducing the operability of the sample purification process, improving the detection efficiency, and reducing the pollution risk of the detection process, improving the safety and accuracy of the detection. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are only some of the embodiments of the present application, and all other drawings obtained by those of ordinary skill in the art without creative effort based on these drawings belong to the protection scope of the present application.

[0034] Figure 1 A front view of an injection device provided for an embodiment of the present application;

[0035] Figure 2 An exploded view of an injection device provided for an embodiment of the present application;

[0036] Figure 3 A top view of an injection device provided for an embodiment of the present application;

[0037] Figure 4 A Figure 3 A-A sectional view in the middle;

[0038] Figure 5 A Figure 3 B-B sectional view in the middle;

[0039] Figure 6 A Figure 3 C-C sectional view in the middle.

[0040] Explanation of reference signs:

[0041] 1, first syringe body; 2, first sealing member; 21, first sealing film; 22, open end; 23, sealing end; 24, sealing ring; 3, syringe branch pipe; 4, second sealing member; 5, first liquid pushing rod assembly; 51, first liquid pushing rod; 52, first liquid pushing plug; 53, first handle part; 6, second sealing film; 7, first protective sleeve; 71, first clamping groove; 72, second clamping groove; 8, liquid outlet head; 9, first puncture connector; 10, injection needle; 11, second limiting flange; 12, third sealing member; 13, puncture interface; 14, second puncture connector; 15, second syringe body; 16, second liquid pushing rod assembly; 17, scale line. DETAILED DESCRIPTION

[0042] The technical solutions of the present application will be described below in connection with the drawings, obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0043] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0044] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] In addition, the technical features involved in the different embodiments of the application described below can be combined with each other as long as they do not conflict with each other.

[0046] Embodiment 1

[0047] Please refer to Figures 1 to 5 The embodiment of the injection device provided by the embodiment of the present application comprises: a first syringe body 1; at least one syringe branch pipe 3, one end of which is in communication with the side wall of the first syringe body 1, and the other end is provided with a second sealing element 4; a first sealing element 2, which is detachably connected to one end of the first syringe body 1; a first liquid pushing rod assembly 5, one end of which is sealingly and slidingly connected in the inner cavity of the first syringe body 1 through the other end of the first syringe body 1; the sealing length of the first liquid pushing rod assembly 5 covers the communication between the syringe branch pipe 3 and the first syringe body 1.

[0048] It should be noted that the number of syringe branch pipes 3 can be selected according to the number of release agents to be purified, and can be one, two, three or more, meeting the needs of mixing multiple release agents, preferably, in an embodiment, the syringe branch pipe 3 is two, which is reasonable in layout and can meet the purification needs of most samples.

[0049] In this embodiment, before sample collection, first move one end of the first liquid pushing rod assembly 5 to the communication position of the syringe branch pipe 3 and the first syringe body 1, block the end of the syringe branch pipe 3 by the first liquid pushing rod assembly 5, avoid the communication of the syringe branch pipe 3 and the first syringe body 1, then detach the second sealing piece 4, put the release agent to be mixed and purified into the syringe branch pipe 3, seal the syringe branch pipe 3 by the second sealing piece 4, then put another release agent into the first syringe body 1 by opening the first sealing piece 2, and then put the test paper strip after sample collection into the first syringe body 1, mix with the release agent in the first syringe body 1 to dilute and purify the test paper strip to obtain purified liquid, then move the first liquid pushing rod assembly 5 away from the first sealing piece 2, so that the syringe branch pipe 3 and the first syringe body 1 are communicated, the release agent in the syringe branch pipe 3 flows into the first syringe body 1 and mixes with the purified liquid to purify again to obtain mixed liquid, then move the first liquid pushing rod assembly 5 to the mixed liquid direction, inject the purified mixed liquid into the detection equipment for detection, which is convenient and convenient. The injection device provided by the application can easily realize multiple purification operations, without the need for multiple transfer and purification operations after sample collection, reducing the operability of the sample purification process, improving the detection efficiency, and the high sealing property can reduce the pollution risk in the detection process, improve the safety and accuracy of the detection.

[0050] Embodiment 2

[0051] As a further improvement to embodiment 1, as shown in Figures 1 to 6 The first liquid pushing rod assembly 5 includes a first liquid pushing rod 51 and a first liquid pushing plug 52; the first liquid pushing plug 52 is in sealing sliding connection with the inner cavity of the first syringe body 1, and the sealing length covers the communication position of the syringe branch pipe 3 and the first syringe body 1; one end of the first liquid pushing rod 51 extends into the inner cavity of the first syringe body 1 and is connected with the first liquid pushing plug 52, and the other end is provided with a first handle part 53.

[0052] In this embodiment, the first handle part 53 facilitates the movement of the first liquid pushing rod 51 and the first liquid pushing plug 52 in the syringe body, the sealing structure of the first liquid pushing plug 52 and the inner cavity of the first syringe body 1 facilitates the flow of the liquid in the inner cavity, and the sealing length of the first liquid pushing plug 52 covers the communication position of the syringe branch pipe 3 and the first syringe body 1, which facilitates the blocking and communication of the syringe branch pipe 3 and the first syringe body 1 when different release agents are put in, and facilitates the adjustment of the mixing and purification of different release agents.

[0053] On the basis of the above-mentioned embodiments, in a preferred embodiment, the first sealing member 2 comprises an open end 22, a sealing end 23 and a first sealing film 21, the open end 22 is detachably connected with the first syringe body 1, the first sealing film 21 is sealingly connected between the open end 22 and the sealing end 23; the sealing end 23 is suitable for being connected with a puncture tube.

[0054] It should be noted that the puncture tube is an external device, which can be applied to a detection device, and is convenient for being connected with the sealing end 23, and at the same time can puncture the first sealing film 21, so that the mixed liquid in the first syringe body 1 is communicated with the detection device, and the detection is facilitated.

[0055] In this embodiment, the open end 22 of the first sealing member 2 is detachably connected with the first syringe body 1, which facilitates the disassembly and assembly of the first sealing member 2 and the first syringe body 1, improves the utilization rate, and the first sealing film 21 arranged in the first sealing member 2 can seal the first syringe body 1, and the sealing end 23 is suitable for being connected with the puncture tube, so that the puncture tube punctures the sealing film while being connected with the sealing end 23, and the mixed liquid in the first syringe body 1 flows into the detection device along the puncture tube for detection.

[0056] On the basis of the above-mentioned embodiments, in a preferred embodiment, the first sealing film 21 is a metal film sealed by heat sealing. The metal film has good stability and toughness, is not easy to break and has good sealing performance. Specifically, the metal film is an aluminum film, which has good sealing performance and is not easy to be damaged, and is beneficial to be punctured by the puncture tube so that the mixed liquid flows out.

[0057] On the basis of the above-mentioned embodiments, in a preferred embodiment, the inner side of the open end 22 is threadedly connected with the side wall of the first syringe body 1. By threadedly connecting the open end 22 with the first syringe body 1, the first sealing member 2 and the first syringe body 1 are facilitated to be disassembled and assembled. As a convertible embodiment, the inner side of the open end 22 can be clamped with the side wall of the first syringe body 1, so as to facilitate disassembly and assembly.

[0058] In an embodiment, a plurality of anti-skid strips are arranged on the outer side of the first sealing member 2 in the vertical direction, so as to improve the friction and facilitate the disassembly and assembly of the first sealing member 2. Alternatively, a plurality of anti-skid ring strips are arranged on the outer side of the first sealing member 2 in the axial direction; or a plurality of anti-skid protrusions are arranged on the outer side of the first sealing member 2, which are in a hemispherical shape.

[0059] On the basis of the above-mentioned embodiments, in a preferred embodiment, a first limiting flange is arranged on the inner cavity of the first sealing member 2, a sealing ring 24 is connected on the inner ring of the first limiting flange, and the sealing ring 24 is in interference fit with the inner cavity of the first syringe body 1.

[0060] In the embodiment, the first limiting flange limits the connection depth of the open end 22 with the first syringe body 1, and the first limiting flange cooperates with the sealing ring 24 to improve the sealing performance of the first sealing member 2.

[0061] Preferably, the first sealing film 21 is arranged on the side of the first limiting flange facing the sealing end 23, further improving the sealing performance of the first sealing member 2.

[0062] Based on the above-mentioned embodiments, in a preferred embodiment, the second sealing member 4 is a first silica gel plug, one end of the first silica gel plug extends into the syringe branch pipe 3 and is in interference fit with the inner cavity of the syringe branch pipe 3.

[0063] In the embodiment, the first silica gel plug is in interference fit with the inner cavity of the syringe branch pipe 3 to seal the syringe branch pipe 3, improve the sealing effect, prevent the release agent from being contaminated, and the first silica gel plug is convenient to disassemble and cover with the injection branch pipe.

[0064] Based on the above-mentioned embodiments, in a preferred embodiment, the injection device further comprises: a liquid outlet head 8 matched with the first sealing member 2, one end of which is detachably connected with the sealing end 23 of the first sealing member 2, and the liquid outlet head 8 is provided with a first puncture connector 9 for communicating with the inner cavity of the first syringe body 1; and an injection needle 10 arranged at the other end of the liquid outlet head 8 and in communication with the first puncture connector 9.

[0065] In the embodiment, the sealing end 23 of the first sealing member 2 is connected with one end of the liquid outlet head 8 provided with the first puncture connector 9, the first puncture connector 9 will pierce the first sealing film 21 in the first sealing member 2, so that the first puncture connector 9 is in communication with the inner cavity of the first syringe body 1, and then in communication with the injection needle 10. When in use, the mixed liquid flows out of the first syringe body 1 through the first puncture connector 9 and then through the injection needle 10, the injection needle 10 can drip, and the liquid outlet mode of the first sealing member 2 is converted through the liquid outlet head 8. When direct dripping on the test paper is needed, the liquid outlet mode can be converted by dripping through the injection needle 10 using the liquid outlet head 8, or when detection on the detection device is needed, the liquid outlet mode can be converted by directly communicating through the first sealing member 2 and the puncture pipe. The liquid outlet head 8 can be selected according to different use scenarios, and the application scenarios of the injection device are improved.

[0066] Specifically, the first puncture connector 9 is in the shape of a conical frustum and is provided with sawteeth at the tip for puncture, and the inside of the first puncture connector 9 is a hollow pipeline for conveniently communicating the injection needle 10 with the inner cavity of the first syringe body 1.

[0067] Based on the above-mentioned embodiments, in a preferred embodiment, the number of the syringe branch pipes 3 is two, and they are symmetrically arranged on the two side walls of the first syringe body 1.

[0068] In the embodiment, the first liquid pushing rod 51 is arranged symmetrically on the two side walls of the first injector body 1, so that the first liquid pushing rod 51 can seal and communicate with the communication part between the injector branch pipe 3 and the first injector body 1 at the same time.

[0069] On the basis of the above-mentioned embodiment, in a preferred embodiment, the inner cavity of the first injector body 1 is provided with a second limiting flange 11 in the circumferential direction; the second limiting flange 11 is arranged between the communication part between the injector branch pipe 3 and the first injector body 1 and the first sealing member 2, so as to limit the sliding length of the first liquid pushing rod assembly 5 in the inner cavity of the first injector body 1.

[0070] It should be noted that in actual application, the mixed solution after the sample is purified is not all used for detection, and the required amount is different according to different detection scenes.

[0071] In the embodiment, the second limiting flange 11 is arranged in the inner cavity of the first injector body 1, so that when the first liquid pushing rod assembly 5 is pushed to inject the mixed solution, the second limiting flange 11 limits the pushing amount of the first liquid pushing rod assembly 5 in the inner cavity of the first injector body 1, so as to avoid that the injection amount is too large or too small to affect the final detection result, and the second limiting flange 11 is arranged on the side of the injector branch pipe 3 close to the first sealing member 2, so as not to affect the blocking of the first liquid pushing rod assembly 5 to the injector branch pipe 3.

[0072] Preferably, the second limiting flange 11 is pre-set at a length away from the communication part between the injector branch pipe 3 and the first injector body 1, so that the sealing length of the first liquid pushing rod assembly 5 in contact with the second limiting flange 11 can also cover the communication part between the injector branch pipe 3 and the first injector body 1, so as to limit the first liquid pushing rod assembly 5 while playing a blocking role, so as to prevent the first liquid pushing rod assembly 5 from moving.

[0073] On the basis of the above-mentioned embodiment, in a preferred embodiment, it further comprises: a puncture interface 13 arranged on the side wall of the first injector body 1 and located between the second limiting flange 11 and the first sealing member 2; a second puncture connector 14 arranged in the puncture interface 13 and communicating with the inner cavity of the first injector body 1; a second injector body 15 sealed by a second sealing film 6 at one end; a second liquid pushing rod assembly 16 slidably connected in the inner cavity of the second injector body 15 at one end through the other end of the second injector body 15; wherein the puncture interface 13 away from the first injector body 1 has a sealing state of detachably connecting the third sealing member 12 and a state of connecting with one end of the second injector body 15, and the second puncture connector 14 pierces the second sealing film 6.

[0074] It should be noted that the puncture interface 13 is detachably connected with one end of the second syringe body 15, and the puncture interface 13 is arranged between the second limiting flange 11 and the first sealing element 2. When there is a requirement for the sequence of adding the release agent and the syringe branch 3 is preferred, the release agent can be added through the puncture interface 13 for mixing and purification in priority, so as to improve the flexibility and convenience of application.

[0075] In the embodiment, when it is needed to mix the release agent again for purification, the release agent can be placed in the second syringe body 15, then the third sealing element 12 at the puncture interface 13 is opened, and one end of the second sealing film 6 arranged in the second syringe body 15 is connected with the puncture interface 13, so that the second puncture connector 14 arranged in the puncture interface 13 pierces the second sealing film 6, so that the inner cavity of the second syringe body 15 is communicated with the first syringe body 1, and the release agent in the second syringe body 15 flows into the first syringe body 1 through the second puncture connector 14, and then the release agent is injected into the first syringe body 1 for mixing and purification by cooperating with the second liquid pushing rod assembly 16. When purification is not needed, the puncture interface 13 can be sealed by the third sealing element 12, so that the puncture interface 13 is in a sealed state, so that adaptive use can be achieved according to requirements, and application scenarios are diversified.

[0076] In an embodiment, the second syringe body 15 is in an L shape, which can save space when connected and is convenient for operation.

[0077] Further, the third sealing element is a second silica gel plug, one end of the second silica gel plug extends into the puncture interface 13 and is in interference fit with the inner cavity of the puncture interface 13, the puncture interface 13 is sealed by the interference fit of the second silica gel plug and the inner cavity of the puncture interface 13, the sealing effect is improved, the release agent is prevented from being contaminated, and the second silica gel plug is convenient for disassembly and cover of the puncture interface 13.

[0078] Further, the second sealing film 6 is a metal film sealed by heat sealing, preferably an aluminum film, which is convenient for storing the release agent and being pierced by the second puncture connector 14.

[0079] On the basis of the above-mentioned embodiments, in a preferred embodiment, a limiting assembly is further included, the limiting assembly is detachably connected with one end of the second syringe body 15 away from the second sealing film 6, and is used for limiting movement of the second liquid pushing rod assembly 16.

[0080] In the embodiment, the movement of the second liquid pushing rod assembly 16 is limited by the limiting assembly, so as to avoid that the second liquid pushing rod assembly 16 is separated from the second syringe body 15, the stored release agent flows out, or the second liquid pushing rod assembly 16 moves towards one end of the second sealing film 6 to push the release agent in the second syringe body 15, so that the second sealing film 6 is broken, and the sealing property is affected.

[0081] In the above embodiment, in a preferred embodiment, the limiting assembly comprises a first protective sleeve 7, and the first protective sleeve 7 is respectively provided with a first clamping groove 71 for clamping the second syringe body 15 and a second clamping groove 72 for clamping the second liquid pushing rod assembly 16.

[0082] In the embodiment, when the second syringe body 15 is equipped with the release agent, the first clamping groove 71 of the first protective sleeve 7 is clamped with the second syringe body 15, and the second clamping groove 72 is clamped with the second liquid pushing rod assembly 16, so as to limit the movement of the second liquid pushing rod assembly 16 in the second syringe body 15.

[0083] Specifically, the second liquid pushing rod assembly 16 comprises a second liquid pushing rod and a second liquid pushing plug; the second liquid pushing plug is in sealing sliding connection with the inner cavity of the second syringe body 15; one end of the second liquid pushing rod extends into the inner cavity of the second syringe body 15 and is connected with the second liquid pushing plug, and the other end is provided with a second handle part.

[0084] In the embodiment, the second liquid pushing rod is moved by the second handle part to drive the second liquid pushing plug to move in the inner cavity of the second syringe body 15, and the liquid injection is performed.

[0085] Specifically, one end of the second syringe body 15 is provided with a first clamping part matched with the first clamping groove 71, and the other end of the second liquid pushing rod assembly 16 is provided with a second clamping part matched with the second clamping groove 72. The first clamping groove 71 is matched and clamped with the first clamping part, and the second clamping groove 72 is matched and clamped with the second clamping part, so as to limit the movement of the first liquid pushing rod assembly 5. Preferably, the second handle part is disc-shaped and the axis is connected with the second liquid pushing rod, the second clamping groove 72 is matched and clamped with the outer edge of the second handle part, and the disassembly and clamping process is relatively convenient.

[0086] In an embodiment, a second protective sleeve is further included, and the second protective sleeve is respectively provided with a third clamping groove for clamping the first syringe body 1 and a fourth clamping groove for clamping the first liquid pushing rod assembly 5.

[0087] In this embodiment, the first liquid pushing rod assembly 5 is further limited by the second protective sleeve, so as to avoid that the first liquid pushing rod assembly 5 moves in the process of loading the releasing agent into the first syringe body 1 and the syringe branch pipe 3, and thus the first syringe body 1 and the syringe branch pipe 3 are communicated, which affects the purification effect of the mixed liquid after the different releasing agents are mixed together, and thus the detection result is affected. The specific working process is as follows: before the first syringe body 1 and the syringe branch pipe 3 are loaded with the releasing agent, the first liquid pushing rod assembly 5 is moved to the position where the sealed syringe branch pipe 3 is communicated with the first syringe body 1, the first liquid pushing rod assembly 5 is separated, and the third clamping groove on the second protective sleeve is clamped with the first syringe body 1 and the fourth clamping groove is clamped with the first liquid pushing rod assembly 5. Then, after the releasing agent and the test strip are fully reacted after being loaded, the second protective sleeve is disassembled, the first liquid pushing rod assembly 5 is moved to make the first syringe body 1 and the syringe branch pipe 3 communicated, and the mixed liquid is mixed and purified.

[0088] Specifically, one end of the first syringe body 1 has a third clamping part matched with the third clamping groove, and the end of the first liquid pushing rod assembly 5 away from the first syringe body 1 has a fourth clamping part matched with the fourth clamping groove. The third clamping groove and the third clamping part are matched and clamped, and the fourth clamping groove and the fourth clamping part are matched and clamped, so as to limit the movement of the first liquid pushing rod assembly 5. Preferably, the first handle part 53 is disc-shaped and the shaft is connected with the first liquid pushing rod 51, the fourth clamping groove is matched and clamped with the outer edge of the first handle part 53, and the disassembly and clamping process is relatively convenient.

[0089] On the basis of the above-mentioned embodiments, in a preferred embodiment, the first syringe body 1 and the syringe branch pipe 3 are integrally injection molded. By integrally injection molding, the stability of the structure is improved, and the service life is further improved.

[0090] On the basis of the above-mentioned embodiments, in a preferred embodiment, the material of the first syringe body 1 and the syringe branch pipe 3 is polypropylene material. By using polypropylene material, the storage capacity of the releasing agent can be improved, and the releasing agent can be stored for a long time, thereby improving the application range of the injection device.

[0091] Further, the material of the second syringe body 15 is polypropylene material, and by using polypropylene material, the storage capacity of the releasing agent can be improved, and the releasing agent can be stored for a long time.

[0092] Further, a plurality of anti-skid ribs along the length direction of the first syringe body 1 are arranged on the first syringe body 1 in the circumferential direction, so as to improve the friction and facilitate use.

[0093] On the basis of the above-mentioned embodiments, in a preferred embodiment, the first syringe body 1 is provided with a scale line 17, and the scale line 17 is arranged on the side of the communication position of the syringe branch pipe 3 and the first syringe body 1 close to the first handle part 53.

[0094] In this embodiment, the scale line 17 can facilitate the user to observe the position of the movement of the first liquid pushing rod assembly 5, ensure the communication between the injector branch pipe 3 and the first injector main body 1, and avoid the movement of the first liquid pushing rod assembly 5 in the direction away from the first sealing element 2 with too large distance, which leads to the failure of the normal movement of the first liquid pushing rod assembly 5 due to the change of the internal pressure difference.

[0095] The use process of the injection device in the embodiment is as follows: first, the first liquid pushing rod 51 is pushed by the first handle part 53 to drive the first liquid pushing plug 52 to move towards the first sealing part 2 until the first liquid pushing plug 52 moves to a position where the first syringe branch pipe 3 can be in communication with the first syringe main body 1, then the third clamping groove on the second protective sleeve is clamped with the first syringe main body 1, the fourth clamping groove is clamped with the first handle part 53, the movement of the first liquid pushing rod assembly 5 is limited, and the first syringe main body 1 and the first syringe branch pipe 3 are kept in a blocked state, then the first silica gel plug on the first syringe branch pipe 3 is opened, the releasing agent is put into the first syringe branch pipe 3, and the first silica gel plug is sealed, then the first sealing part 2 is opened, the one end of the first syringe main body 1 is covered by the opening end 22 of the first sealing part 2 after another releasing agent is injected, the opening end 22 is covered to the position where the first syringe main body 1 contacts with the first limiting flange, the first syringe main body 1 is sealed by the first sealing film 21 and the sealing ring 24 in the first sealing part 2, the first sealing part 2 can be opened when in use, the test strip for collecting samples is put into the first syringe main body 1, the releasing agent in the first syringe main body 1 is purified first to obtain purified liquid, after the test strip and the releasing agent are purified for a preset time, the second protective sleeve is separated from the first syringe main body 1 and the first handle part 53, the first handle part 53 is pulled to drive the first liquid pushing rod 51 to move the first liquid pushing plug 52 away from the first sealing part 2, so that the first syringe branch pipe 3 is in communication with the first syringe main body 1, at this time, the releasing agent in the first syringe branch pipe 3 flows into the first syringe main body 1 and mixes with the purified liquid to be purified again to obtain mixed liquid, at this time, if it is needed to add releasing agent again for purification, the third sealing part 12 at the puncture interface 13 is opened, the second syringe main body 15 is connected with the puncture interface 13 through one end of the second syringe main body 15 provided with the second sealing film 6, the second puncture connector 14 pierces the second sealing film 6, at this time, the first protective sleeve 7 is separated from the second syringe main body 15 and the second liquid pushing rod, the releasing agent in the second syringe main body 15 is injected into the first syringe main body 1 along the second puncture connector 14 by pushing the second liquid pushing rod to obtain new mixed liquid, after the new mixed liquid is reacted and purified for a preset time, the second protective sleeve is separated from the first syringe main body 1 and the first liquid pushing rod 51, then the sealing end 23 of the first sealing part 2 is connected with the puncture tube in the external equipment, the puncture end of the puncture tube can pierce the first sealing film 21, so that the inner cavity of the first syringe main body 1 is in communication with the puncture tube, at this time, the first liquid pushing rod assembly 5 is matched, the first liquid pushing rod 51 is pushed by the first handle part 53 to drive the first liquid pushing plug 52 to push the mixed liquid in the first syringe main body 1 to move towards the first sealing part 2 until the second limiting flange 11 limits the first liquid pushing plug 52 to limit the liquid output of the first syringe main body 1, the mixed liquid in the first syringe main body 1 is injected into the detection equipment along the puncture tube for detection, or the liquid outlet 8 is connected with the first sealing part 2, the first sealing film 21 is pierced by the first puncture connector 9,The mixed solution is caused to flow out from the first injector body 1, pass through the first puncture joint 9, and then pass through the injection needle 10 to drip the mixed solution onto the test paper for detection. In this way, multiple purification operations can be easily realized without the need for multiple transfers after collecting the sample, reducing the operability of the sample purification process, improving the detection efficiency, and having high sealing to reduce the risk of contamination during the detection process, thereby improving the safety and accuracy of the detection.

[0096] Obviously, the above embodiments are only examples for clearly illustrating the present application, and are not intended to limit the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments cannot be exhaustively listed. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. An injection device, characterized in that The injection device comprises: a first syringe body (1); at least one syringe branch (3) having one end in communication with the side wall of the first syringe body (1) and the other end provided with a second sealing member (4); a first sealing member (2) detachably connected to one end of the first syringe body (1); a first liquid pushing rod assembly (5) having one end sealingly and slidably connected to the inner cavity of the first syringe body (1) through the other end of the first syringe body (1), and the sealing length of the first liquid pushing rod assembly (5) covering the communication part of the syringe branch (3) and the first syringe body (1); the first sealing member (2) comprises an open end (22), a sealing end (23) and a first sealing film (21), the inner side of the open end (22) is threadedly connected with the side wall of the first syringe body (1), and the first sealing film (21) is sealingly connected between the open end (22) and the sealing end (23); the sealing end (23) is adapted to be connected with a puncture tube; the first liquid pushing rod assembly (5) comprises a first liquid pushing rod (51) and a first liquid pushing plug (52); the first liquid pushing plug (52) is sealingly and slidably connected with the inner cavity of the first syringe body (1), and the sealing length covers the communication part of the syringe branch (3) and the first syringe body (1); one end of the first liquid pushing rod (51) extends into the inner cavity of the first syringe body (1) and is connected with the first liquid pushing plug (52), and the other end is provided with a first handle part (53); the inner cavity of the first syringe body (1) is provided with a second limiting flange (11) in the circumferential direction; the second limiting flange (11) is arranged between the communication part of the syringe branch (3) and the first syringe body (1) and the first sealing member (2), so as to limit the sliding length of the first liquid pushing rod assembly (5) in the inner cavity of the first syringe body (1).

2. An injection device according to claim 1, wherein, a first limiting flange is arranged on the inner cavity of the first sealing member (2), a sealing ring (24) is connected to the inner ring of the first limiting flange, and the sealing ring (24) is in interference fit with the inner cavity of the first syringe body (1); and / or, the first sealing film (21) is a metal film sealed by heat sealing; and / or, the injection device further comprises: a liquid outlet head (8) matched with the first sealing member (2), one end of which is detachably connected with the sealing end (23) of the first sealing member (2) and is provided with a first puncture connector (9) for communicating with the inner cavity of the first syringe body (1); an injection needle (10) arranged at the other end of the liquid outlet head (8) and in communication with the first puncture connector (9).

3. The injection device of claim 1, wherein, The number of the syringe branches (3) is two, and they are respectively and symmetrically arranged on the two side walls of the first syringe body (1).

4. The injection device of claim 1, wherein, Further comprising: a puncture interface (13) arranged on the side wall of the first syringe body (1) and located between the second limiting flange (11) and the first sealing member (2). A second puncture joint (14) is arranged in the puncture interface (13) and communicates with the inner cavity of the first syringe body (1); A second syringe body (15) is sealed by a second sealing film (6) at one end; A second liquid pushing rod assembly (16) is slidably connected in the inner cavity of the second syringe body (15) at the other end of the second syringe body (15); Wherein, the puncture interface (13) is detachably connected with a third sealing member (12) at the end away from the first syringe body (1) in a sealed state, and is connected with the one end of the second syringe body (15) in an injection state in which the second puncture joint (14) pierces the second sealing film (6).

5. An injection device according to claim 4, wherein, Further comprising a limiting assembly which is detachably connected with the one end of the second syringe body (15) away from the second sealing film (6) and is used for limiting the movement of the second liquid pushing rod assembly (16).

6. An injection device according to claim 5, wherein, The limiting assembly comprises a first protective sleeve (7) which is respectively provided with a first clamping groove (71) for clamping the second syringe body (15) and a second clamping groove (72) for clamping the second liquid pushing rod assembly (16).

7. An injection device according to any of claims 1 to 6, wherein, The first syringe body (1) and the syringe branch pipe (3) are integrally injection molded.

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