A reagent bag connector and a reagent bag

Abstract

This utility model discloses a reagent bag connector, comprising: a connector shell, a sealing plug, and a rear plug. The connector shell has a receiving hole, and the sealing plug includes an elastic ball head. The sealing plug is made of an elastomeric material, and the sealing plug is fixed to the lower part or lower side of the connector shell by the rear plug. The elastic ball head blocks the receiving hole of the connector shell. A liquid dispensing connector extends from the upper end of the receiving hole and squeezes the elastic ball head to make the receiving hole and the lower part of the connector shell communicate to form a flow channel. This utility model's reagent bag connector utilizes the elastic ball head of the sealing plug to block the receiving hole of the connector shell, and the rear plug is used to fix the sealing plug, thereby sealing the connection channel between the inside and outside of the reagent bag. In use, the liquid dispensing connector pushes open the elastic ball head to open the flow channel. The elastomeric material has a large pre-compression force, avoiding the poor consistency of the elastic force of metal springs and the micro-leakage caused by vibration during transportation, greatly improving the sealing performance of the reagent bag connector.

Description

Technical Field

[0001] This utility model relates to the field of medical supplies technology, specifically to a reagent bag connector. Background Technology

[0002] Currently, commercially available electrolyte blood gas analyzer kits use reagent bags with integrated liquid inlet and outlet devices. Besides this function, these devices also include other auxiliary structures for easy attachment to the kit. The connection and disconnection between the reagents in the internal reagent bag and the flow path on the external instrument is achieved by opening and closing a solenoid valve on the instrument or a one-way valve on the reagent bag connector. This structure is prone to the following three drawbacks: ① The elastic element of the one-way valve is a metal spring, which requires a coating. This coating is prone to cracking or peeling, leading to reagent deterioration; ② The elastic force range of the metal elastic element is large, resulting in poor consistency and low reliability; ③ The seal is achieved by using the elastic force generated by compressing the metal elastic element to push the seal on the piston. This seal is susceptible to external vibrations or the shaking and impact of the reagents inside the bag during transportation, leading to micro-leakage and causing deterioration of the blood gas reagents. Utility Model Content

[0003] The main purpose of this invention is to provide a reagent bag nozzle that solves the problem of reagent deterioration caused by poor sealing performance of existing reagent bag nozzle structures.

[0004] To achieve the above objectives, the first aspect of this utility model provides a reagent bag nozzle, which includes a nozzle shell, a sealing plug, and a rear plug. The nozzle shell has a receiving hole, and the sealing plug includes an elastic ball head. The sealing plug is made of an elastomeric material, and the sealing plug is fixed to the lower part or lower side of the nozzle shell by the rear plug. The elastic ball head blocks the receiving hole of the nozzle shell, and the liquid dispensing connector extends from the upper end of the receiving hole to squeeze the sealing plug so that the receiving hole communicates with the lower part of the nozzle shell to form a flow channel.

[0005] Preferably, a liquid passage groove is formed on the lower side of the receiving hole, and the elastic ball head is disposed in the receiving hole. When the elastic ball head is in the elastic recovery state, it blocks the liquid passage groove and, under compression, makes the liquid passage groove, the receiving hole, and the lower part of the nozzle shell communicate to form a flow channel.

[0006] Preferably, the sealing plug further includes a first columnar body, the receiving hole includes a first section hole and a second section hole disposed at the lower end of the first section hole, the inner diameter of the second section hole is larger than the inner diameter of the first section hole, a sealing slope for transition is provided between the first section hole and the second section hole, the liquid passage groove is disposed on the second section hole, the first columnar body is at least partially located in the second section hole and the elastic ball head is at least partially inserted into the first section hole.

[0007] Preferably, the sealing plug is integrally formed, and N anti-rotation ribs are provided on the outer side of the first columnar body, and M ribs that cooperate with the anti-rotation ribs are provided on the hole wall corresponding to the receiving hole, wherein M≥N, and M and N are both positive integers.

[0008] Preferably, the tail end of the first columnar body is provided with a hollow sealing plug cavity, and the front end of the rear plug is provided with a columnar protrusion, the columnar protrusion being assembled in the sealing plug cavity.

[0009] Preferably, the rear plug is cylindrical, and a through-hole for liquid flow is provided on the cylindrical body of the rear plug.

[0010] The tail of the connector shell is provided with a rear plug groove, and the rear plug is provided with a hook that engages with the rear plug groove.

[0011] Preferably, the top of the receiving hole is further provided with a placement groove, the reagent bag nozzle is further provided with a sealing ring disposed in the placement groove, the inner wall of the placement groove is further provided with a front plug groove, the reagent bag nozzle is further provided with a front plug for pressing the sealing ring, and the outer side of the front plug is provided with a fastening position for engaging with the front plug groove.

[0012] Preferably, the reagent bag nozzle includes wing plates connected to both sides of the front part of the nozzle shell, and the wing plates and the nozzle shell directly form an assembly slot.

[0013] As a second aspect of the present invention, a reagent bag is also provided, comprising a bag body and a reagent bag nozzle as described in any of the first aspects of the present invention.

[0014] The reagent bag connector of this invention utilizes the elastic ball head of the sealing plug to block the receiving hole of the connector shell. The rear plug is used to fix the sealing plug, thereby sealing the connection channel between the inside and outside of the reagent bag. During use, the liquid dispensing connector is used to squeeze the elastic ball head, causing the sealing plug to deform, thus enabling the receiving hole to connect with the bag body below the connector shell to form a flow channel. When the liquid dispensing connector is removed, the elastic ball head returns to its original blocking state, forming a one-way valve function. The metal elastic element is replaced by an elastic ball head made of elastomeric material, which avoids the coating layer peeling off and blocking the channel and causing reagent deterioration. The elastomeric material has a large pre-compression force, avoiding the occurrence of micro-leakage caused by poor elasticity of metal springs and vibration during transportation, which greatly improves the sealing performance of the reagent bag connector and reduces the possibility of reagent bag deterioration due to micro-leakage of the connector.

[0015] When the reagent bag with this reagent bag connector is inserted into the reagent bag connector, the sealing plug is compressed and deformed, the one-way valve opens, the reagent liquid is connected, and the instrument pump draws the liquid from the bag into the instrument's liquid path; when the liquid connector is removed, the sealing plug immediately springs back, blocking the outward flow of the liquid, and the one-way valve connector's blocking function is restored. The reagent bag only opens its flow channel when the liquid connector is inserted for use, which can keep the reagent from deteriorating for a long time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the reagent bag connector of this utility model;

[0018] Figure 2 This is an exploded view of the reagent bag connector of this utility model;

[0019] Figure 3 This is a cross-sectional view of the reagent bag connector of this utility model;

[0020] Figure 4 This is a cross-sectional view of the liquid outlet of the reagent bag of this utility model;

[0021] Figure 5 This is a schematic diagram of the sealing plug structure of this utility model;

[0022] Figure 6 This is a cross-sectional view of the sealing plug of this utility model;

[0023] Figure 7 This is a schematic diagram of the rear plug structure of this utility model;

[0024] Figure 8 This is a sectional view of the rear plug of this utility model;

[0025] Figure 9 This is a partial sectional view of the connector shell of this utility model;

[0026] Figure 10 This is a cross-sectional view of the connector shell of this utility model;

[0027] Figure 11 This is a schematic diagram of the sealing ring structure of this utility model;

[0028] Figure 12 This is a cross-sectional view of the sealing ring of this utility model;

[0029] Figure 13 This is a schematic diagram of the reagent bag structure of this utility model.

[0030] Explanation of icon numbers:

[0031] Reagent bag connector 1;

[0032] 10. Connector housing, 11. Receiving hole, 111. First section hole, 112. Second section hole, 113. Third section hole, 114. Sealing slope, 115. Placement groove, 116. Front plug groove, 12. Receiving cavity, 13. Liquid passage groove, 14. Protruding rib, 15. Rear plug groove, 16. Wing plate, 161. Assembly groove, 17. Connector bag film pressing surface;

[0033] 20 sealing plug, 21 elastic ball head, 22 first columnar body, 23 anti-rotation rib, 24 inner cavity of sealing plug

[0034] 30. Rear plug; 31. Columnar protrusion; 32. Column; 33. Rear plug liquid passage hole; 34. Hook; 35. Annular ring.

[0035] Sealing ring 40, triangular ring rib 41;

[0036] Front plug 50, latch 51;

[0037] Liquid dispensing connector 2; bag body 2.

[0038] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0041] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0042] Combined with appendix Figure 1-13 This utility model proposes a reagent bag connector 1, which includes a connector shell 10, a sealing plug 20, and a rear plug 30. The connector shell 10 has a receiving hole 11. The sealing plug 20 includes an elastic ball head 21, which is made of an elastomeric material. The sealing plug 20 is fixed to the lower part or lower side of the connector shell 10 by the rear plug 30. The elastic ball head 21 blocks the receiving hole 11 of the connector shell 10. The liquid dispensing connector 2 extends into the upper end of the receiving hole 11 and squeezes the sealing plug 20 so that the receiving hole 11 and the lower part of the connector shell 10 are connected to form a flow channel.

[0043] The reagent bag connector 1 of this invention utilizes the elastic ball head 21 of the sealing plug 20 to block the receiving hole 11 of the connector shell 10. The rear plug 30 is used to fix the sealing plug 20, thereby sealing the connection channel between the inside and outside of the reagent bag. In use, the liquid dispensing connector 2 is used to squeeze the elastic ball head 21, and the sealing plug 20 is compressed and deformed, thereby making the receiving hole and the bag body below the connector shell connected to form a flow channel. When the liquid dispensing connector 2 is removed, the elastic ball head 21 returns to its original blocking state, forming a one-way valve function. The metal elastic element is replaced by the elastic ball head 21 of the elastomeric material, which avoids the coating layer peeling off and blocking the channel and causing the reagent to deteriorate. The elastomeric material has a large pre-compression force, avoiding the poor consistency of the elastic force of the metal spring and the micro-leakage caused by vibration during transportation, which greatly improves the sealing performance of the reagent bag connector 1 and reduces the possibility of the reagent bag deteriorating due to micro-leakage of the connector.

[0044] Specifically, the elastic ball head 21 is a solid hemispherical spherical plug, the shape of which matches the receiving groove 11. The sealing plug 20 is made of an elastomer material. In this embodiment, it is made of silicone rubber, which has small deformation and can ensure reliable sealing even in the event of eccentricity. In other embodiments, nitrile rubber, natural rubber, polyurethane elastomers, etc., can be used. The sealing plug 20 satisfies the requirement that, under compression, the elastic ball head 21 moves downwards, thereby allowing the receiving hole 11 to communicate with the lower part of the nozzle shell 10 to form a flow channel for reagent circulation. Under the state of elastic force recovery, the elastic ball head 21 blocks the receiving hole 11, thereby closing the flow channel. Specifically, the deformation of the sealing plug 20 can be caused by the elastic ball 21 itself having sufficient deformation to deform during compression, thereby moving its position downward and removing the blockage of the receiving hole 11. Alternatively, it can be caused by the compression of the elastic ball head 21 to deform the sealing plug 20 as a whole, thereby moving the position of the elastic ball head 21 downward and removing the blockage of the receiving hole 11, thus opening the corresponding flow channel. For example, the lower or middle part of the sealing plug can be caused by the deformation of its elastomeric material during compression, thereby driving the position of the elastic ball head 21 downward.

[0045] The sealing plug 20 is fixed to the lower part or lower side of the connector shell 10 by the rear plug 30. Its elastic ball head 21 may be partially disposed in the receiving hole 11, or abut against the lower opening of the receiving hole 11. Specifically, in this utility model, the lower part of the connector shell 10 is provided with a receiving cavity 12, and the receiving hole 11 extends from the upper end of the connector shell 10 to the inner side of the receiving cavity 12.

[0046] Furthermore, as a preferred embodiment, a liquid-passing groove 13 is also provided on the lower side of the receiving hole 11. The elastic ball head 21 is disposed in the receiving hole 11. When the elastic ball head 21 is in the elastic recovery state, it blocks the liquid-passing groove 13 and, under compression, makes the liquid-passing groove 13 communicate with the receiving hole 11 and the lower part of the nozzle shell 10 to form a flow channel.

[0047] Combination Figure 2-5 A liquid-passing groove 13 is provided on the lower side of the receiving hole 11. An elastic ball head 21 is disposed within the receiving hole 11, ensuring the stability of the elastic ball head 21 within the receiving hole 11 and facilitating the formation of a flow channel when the liquid dispensing connector 2 is inserted into the receiving hole 11 and squeezes the elastic ball head 21. At this time, the reagent flows from the liquid dispensing connector 2 into the receiving hole 11, through the liquid-passing groove 13, and into the receiving cavity 12 and the reagent bag below, or vice versa. One or more liquid-passing grooves 13 can be provided to facilitate the flow of reagent into the reagent bag.

[0048] like Figure 4As shown, the arrows indicate the direction of reagent flow during liquid dispensing. The reagent from the reagent bag flows from the bag body 2 to the accommodating cavity 12, and then through the liquid-passing tank 13 into the dispensing connector 2 in the accommodating hole 11, thus being delivered to the external instrument.

[0049] Specifically, the sealing plug 20 includes a first columnar body 22 in addition to the elastic ball head 21. The receiving hole 11 includes a first section hole 111 and a second section hole 112 disposed at the lower end of the first section hole 111. The inner diameter of the second section hole 112 is larger than the inner diameter of the first section hole 111. A sealing inclined surface 114 for transition is provided between the first section hole 111 and the second section hole 112. The liquid passage groove 13 is disposed on the second section hole 112. The first columnar body 22 is at least partially located in the second section hole 112, and the elastic ball head 21 is at least partially inserted into the first section hole 111. The sealing plug 20 can be fixed by using the first section hole 111 and the second section hole 112, while the sealing inclined surface 114 can interact with other structures to ensure a tight contact between the elastic ball head 21 and the sealing inclined surface 114. The curvature of the sealing inclined surface 114 is the same as the curvature of the elastic ball head 21.

[0050] In this embodiment, the length of the first segment hole 111 must be less than the insertion length of the liquid-taking connector 2. When the liquid-taking connector 2 is inserted from the upper end of the receiving hole 11, it is inserted into the first segment hole 111 and squeezes the elastic ball head 21, causing the liquid passage 13 to leak out, thereby opening the flow channel. In this embodiment, the sealing plug 20 is entirely placed inside the first segment hole 111 and the second segment hole 112.

[0051] Combined with appendix Figure 5-8 Furthermore, the sealing plug 20 of this invention is integrally molded from a single piece of silicone rubber. N anti-rotation ribs 23 are formed on the outer side of the first columnar body 22, and M raised ribs 14, which cooperate with the anti-rotation ribs 23, are formed on the wall of the corresponding receiving hole 11, where M ≥ N, and M and N are both positive integers. The raised ribs 14 are located at the position of the second segment hole 112. The raised ribs 14 allow the anti-rotation ribs 23 to be embedded and engaged. The cooperation between the anti-rotation ribs 23 and the raised ribs 14 prevents the sealing plug 20 from rotating and springing back after unloading, thus avoiding a poor seal. The fact that M is greater than N facilitates the alignment of the sealing plug 20.

[0052] In a specific embodiment, M is 7 and N is 3. That is, there are three semi-cylindrical anti-rotation ribs 23 on the outside of the first columnar body 22, and seven protruding ribs 14 are provided on the hole wall corresponding to the second section hole 112. Based on the cooperation between the anti-rotation ribs 23 and the protruding ribs 14, the expansion and contraction deformation of the sealing plug 20 is guided.

[0053] In one specific embodiment, the tail end of the first columnar body 22 is provided with a hollow sealing plug cavity 24, and the front end of the rear plug 30 is provided with a columnar protrusion 31. The columnar protrusion 31 is assembled in the sealing plug cavity 24, and the sealing plug 20 is fixed by the docking of the columnar protrusion 31 and the sealing plug 20, thereby pressing the sealing plug 20. Furthermore, the setting of the sealing plug cavity 24 also facilitates the deformation of the sealing plug 20, so that when the elastic ball head 21 is squeezed, the sealing plug deforms, and the position of the elastic ball head 21 moves downward, thereby making the liquid groove 13 and the receiving hole 11 connected.

[0054] Specifically, the rear plug 30 is cylindrical, with a cylindrical protrusion 31 located at the front end of the column body 32. A through-hole 33 is provided on the column body 32 of the rear plug 30, which communicates with the inner cavity 24 of the sealing plug during assembly. This allows for timely drainage of liquid from the inner cavity 24 of the sealing plug when the sealing plug 20 is deformed under pressure, preventing obstruction during deformation.

[0055] Combined with appendix Figure 7-9 Furthermore, the tail of the connector shell 10 is provided with a rear plug groove 15, and the rear plug 30 is provided with a hook 34 that engages with the rear plug groove 15.

[0056] Specifically, the receiving groove also includes a third section hole 113 located at the lower end of the second section hole 112. The rear plug groove 15 is formed on the outer wall of the third section hole 113 and is an annular groove on the outer wall. The rear plug 30 is provided with an annular ring 35, which is located on the outer side of the post 32 of the rear plug 30. The inner side of the annular ring 35 is provided with a hook 34 that engages with the rear plug groove 15.

[0057] Combined with appendix Figure 8 and appendix Figure 9 Specifically, the outer diameter of the third-section hole 113 is larger than the outer diameter of the second-section hole 112 and larger than the outer diameter of the column 32 of the rear plug 30, but smaller than the inner diameter of the annular ring 35. The sealing plug 20 is entirely located within the receiving hole 11, and the front end of the rear plug 30 and part of the first columnar body 22 are located within the third-section hole 113. The bottom of the corresponding outer wall of the receiving hole 11 is embedded in the annular ring 35. The rear plug 30 is engaged with the rear plug groove 15 through the hook 34 on the inner side of the annular ring 35, simultaneously pressing the sealing plug 20. Utilizing the action of the rear plug groove 15 and the hook 34, the rear plug 30 can rotate but will not fall off. Simultaneously, the rear plug 30 is partially placed in the third-section hole 113, which can be used to clamp and shape the tail of the connector shell 10, preventing deformation and pressure on the connector sealing plug 20, thus affecting its elastic deformation. Specifically, multiple rear plug grooves 15 and hooks 34 can be provided. The hooks 34 can be evenly distributed within the annular ring 35, and the rear insert groove 15 can be multiple annular grooves evenly arranged vertically.

[0058] In this invention, the rear plug 30 is connected to the nozzle shell 10 by an internal and external clamping snap-fit ​​structure, which ensures that the rear plug 30 will not fall off and cause the reagent bag to fail to seal.

[0059] Combined with appendix Figure 2 and appendix Figure 9 In one specific embodiment, the top of the receiving hole 11 is further provided with a placement groove 115, the reagent bag nozzle 1 further includes a sealing ring 40 disposed in the placement groove 115, the inner wall of the placement groove 115 is further provided with a front plug groove 116, the reagent bag nozzle 1 is further provided with a front plug 50 for pressing the sealing ring 40, and the outer side of the front plug 50 is provided with a fastening position 51 that engages with the front plug groove 116.

[0060] Further integration Figure 10 and 11 The sealing ring 40 is used to seal the front end of the liquid dispensing connector 2. The sealing ring 40 is a cylindrical black rubber part with four annular triangular ribs 41 inside. The multiple triangular annular ribs 41 of the sealing ring 40 ensure the isolation of the reagent from the atmosphere and the sealing of the reagent in the working state when the reagent bag is dispensing liquid from the instrument's liquid dispensing connector 2. When the instrument's sampling connector is inserted, multiple seals are achieved before the sealing plug 20 is opened, isolating the liquid in the bag from contact with the outside air. The front plug 50 is used to fix the sealing ring 40. After the sealing ring 40 is inserted into the placement groove 115 of the connector shell 10, the buckle 51 of the front plug 50 is engaged with the front plug slot 116 of the placement groove 115, thereby pressing the sealing ring 40 to ensure the airtightness between the sealing ring 40 and the connector shell 10.

[0061] Combination Figure 2 and Figure 3 Furthermore, in this invention, the reagent bag connector 1 includes wing plates 16 connected to both sides of the front part of the connector shell 10, and the wing plates 16 and the connector shell 10 directly form an assembly slot 161. The assembly slot 161 is used to secure the reagent bag to the reagent pack or reagent kit, facilitating the fixation of the reagent bag.

[0062] As a second aspect of this utility model, in conjunction with the appendix Figure 13 Furthermore, a reagent bag is provided, comprising a bag body 2 and a reagent bag connector 1 as described in any of the above embodiments. A connector bag film sealing surface 17 is provided on the outer side of the connector shell 10, and the high-barrier film bag body 2 and the connector bag film sealing surface are sealed together to form a reagent bag using a heat-press sealing method.

[0063] The reagent bag connector 1 of this invention utilizes the elastic ball head 21 of the sealing plug 20 to block the receiving hole 11 of the connector shell 10. A rear plug 30 is used to fix the sealing plug 20, thereby sealing the connection channel between the inside and outside of the reagent bag. During use, the liquid dispensing connector 2 squeezes the elastic ball head 21, causing the sealing plug 20 to deform and thus creating a flow channel. When the liquid dispensing connector 2 is removed, the elastic restoring force of the sealing plug 20 causes the elastic ball head 21 to recover, thereby blocking the receiving groove 11 again, forming a one-way valve function. The metal elastic element is replaced by a silicone rubber sealing plug 20, preventing the coating layer from peeling off and blocking the channel, and preventing reagent deterioration. The silicone rubber component has a large pre-compression force, avoiding the poor consistency of the metal spring force and the micro-leakage caused by vibration during transportation, greatly improving the sealing performance of the reagent bag connector 1 and reducing the possibility of reagent bag deterioration due to micro-leakage at the connector.

[0064] Working principle:

[0065] The reagent bag connector 1 consists of a connector shell 10, a front plug 50, a sealing ring 40, a sealing plug 20, and a rear plug 30. The sealing ring 40 is fastened to the front plug 50 by the snap 51 and the front plug groove 116 of the connector shell 10. It is pressed tightly into the placement groove 115 by the elastic deformation of the front plug 50 and the sealing ring 40, forming a sealing structure on the outside of the connector shell 10. The sealing plug 20 is inserted from the bottom of the receiving hole 11, with the elastic ball head 21 facing into the first section hole 111. The cylindrical body of the sealing plug 20 is inserted into the second section hole 112, and then pressed and fastened by the rear plug 30. Through the pre-elastic deformation of the sealing plug 20, the elastic ball head 21 is pressed against the sealing slope 114 on the inside of the receiving hole 11, forming a seal.

[0066] After the one-way valve reagent bag connector 1 is assembled, the high-barrier film bag body 2 and the connector bag film pressing surface 17 are sealed into a reagent bag using a heat-pressing method. The instrument's liquid dispensing connector 2 is inserted into the reagent bag connector 1. The liquid dispensing connector 2 is tightly connected to the annular rib inside the sealing ring 40 to ensure that external air does not enter the reagent bag. The front end pushes inward, and the sealing plug 20 is compressed and deformed, opening the one-way valve, connecting the reagent liquid, and the instrument pump draws the liquid from the bag to the instrument's liquid path; when the liquid dispensing connector 2 is withdrawn, the sealing plug 20 immediately rebounds, blocking the outward liquid channel, and the one-way valve connector's barrier function is restored.

[0067] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A reagent bag connector, characterized in that, include: The connector shell, sealing plug, and rear plug are provided. The connector shell has a receiving hole. The sealing plug includes an elastic ball head and is made of an elastomeric material. The sealing plug is fixed to the lower part or lower side of the connector shell by the rear plug. The elastic ball head blocks the receiving hole of the connector shell. The liquid receiving connector extends from the upper end of the receiving hole and squeezes the sealing plug to make the receiving hole communicate with the lower part of the connector shell to form a flow channel.

2. The reagent bag connector according to claim 1, characterized in that, A liquid passage groove is formed on the lower side of the receiving hole. The elastic ball head is disposed in the receiving hole. When the elastic ball head is in the elastic recovery state, it blocks the liquid passage groove and, under compression, makes the liquid passage groove, the receiving hole, and the lower part of the nozzle shell communicate to form a flow channel.

3. The reagent bag connector according to claim 2, characterized in that, The sealing plug further includes a first columnar body, the receiving hole includes a first section hole and a second section hole disposed at the lower end of the first section hole, the inner diameter of the second section hole is larger than the inner diameter of the first section hole, a sealing slope for transition is provided between the first section hole and the second section hole, the liquid passage groove is disposed on the second section hole, the first columnar body is at least partially located in the second section hole and the elastic ball head is at least partially inserted into the first section hole.

4. The reagent bag connector according to claim 3, characterized in that, The sealing plug is integrally formed, and N anti-rotation ribs are provided on the outer side of the first columnar body. M ribs that cooperate with the anti-rotation ribs are provided on the hole wall corresponding to the receiving hole, where M≥N and M and N are both positive integers.

5. The reagent bag connector according to claim 3, characterized in that, The tail end of the first columnar body is provided with a hollow sealing plug cavity, and the front end of the rear plug is provided with a columnar protrusion, which is assembled in the sealing plug cavity.

6. The reagent bag connector according to claim 5, characterized in that, The rear plug is cylindrical, and a through-hole for liquid flow is provided on the cylindrical body of the rear plug.

7. The reagent bag connector according to any one of claims 1-6, characterized in that, The tail of the connector shell is provided with a rear plug groove, and the rear plug is provided with a hook that engages with the rear plug groove.

8. The reagent bag connector according to any one of claims 1-6, characterized in that, The top of the receiving hole is also provided with a placement groove, and the reagent bag nozzle also includes a sealing ring disposed in the placement groove. The inner wall of the placement groove is also provided with a front plug groove, and the reagent bag nozzle is also provided with a front plug for pressing the sealing ring. The outer side of the front plug is provided with a fastener that engages with the front plug groove.

9. The reagent bag connector according to any one of claims 1-6, characterized in that, The reagent bag connector includes wing plates connected to both sides of the front part of the connector shell, and the wing plates and the connector shell directly form an assembly slot.

10. A reagent bag, characterized in that, Includes a bag body and a reagent bag connector as described in any one of claims 1-9.

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