Quantitative liquid discharging device

Abstract

The utility model provides a quantitative liquid drainage device, and belongs to the technical field of medical auxiliary tools. The quantitative liquid discharger comprises a liquid storage structure, the liquid storage structure comprises a liquid storage barrel, a fixed bottom plate is arranged in the middle of the interior of the liquid storage barrel, and the fixed bottom plate and the liquid storage barrel are integrally connected; the top of the liquid storage barrel is connected with a liquid taking structure. The side face of the liquid taking structure is connected with a liquid inlet structure. An adjusting structure is arranged in the liquid storage barrel, and the adjusting structure is connected with the fixed bottom plate; and a locking structure is arranged in the liquid storage barrel and above the fixed bottom plate. By arranging the adjusting structure, the volume of the liquid storage barrel can be changed through the adjusting structure, the liquid extraction effect is effectively improved, by arranging the locking structure, the locking structure is simple and convenient to install, regular maintenance is not needed, the medical cost is effectively reduced, the liquid extraction structure automatically locks the liquid extraction piece when the liquid extraction amount reaches a set value, and the liquid extraction efficiency is improved. The operation is simple, and the liquid taking efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical auxiliary tools, in particular to a quantitative liquid discharger. Background Art

[0002] Many drugs used clinically, especially those for intramuscular injection, need to be quantitatively administered according to the patient's age, weight and other conditions. When taking liquid drugs, a syringe is usually used to extract the drug once or multiple times. For example, when normal saline is used for intravenous injection clinically, medical staff need to follow the patient's doctor's orders and use a syringe to inject or extract an appropriate amount of normal saline from the normal saline bottle. During this process, the syringe is repeatedly inserted into or extracted from the normal saline bottle. Each time the normal saline is extracted, the amount of liquid needs to be calculated, which brings great inconvenience to the medical staff. At the same time, the syringe needle is repeatedly exposed to the air and then inserted into the normal saline bottle, increasing the risk of normal saline contamination.

[0003] The quantitative liquid discharger in the prior art has problems such as complex structure and high maintenance cost, which increases medical costs. Therefore, the present application provides a quantitative liquid discharger to meet the needs. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a quantitative liquid discharger to solve the problems of complex structure and high maintenance cost of the existing quantitative liquid discharger.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A quantitative liquid discharger comprises a liquid storage structure, wherein the liquid storage structure comprises a liquid storage barrel, a fixed bottom plate is provided in the middle of the liquid storage barrel, and the fixed bottom plate is integrally connected to the liquid storage barrel; a liquid taking structure, wherein the liquid taking structure is provided at the top of the liquid storage barrel, and a liquid inlet structure is connected to the side of the liquid taking structure; an adjusting structure, wherein the adjusting structure is provided inside the liquid storage barrel and connected to the fixed bottom plate; and a locking structure, wherein the locking structure is provided inside the liquid storage barrel and located above the fixed bottom plate.

[0007] Optionally, a through hole is opened at the center of the fixed bottom plate surface, a threaded tube is integrally connected to the through hole on the outer surface of the fixed bottom plate, a perspective window is opened on the side of the liquid storage barrel, the perspective window is sealed and covered by a transparent plate, and a scale bar is engraved on one side of the perspective window.

[0008] Optionally, the adjustment structure includes an adjustment plate, which is located above the fixed bottom plate, and the side of the adjustment plate is in sealing contact with the inner wall of the liquid storage barrel. The bottom of the adjustment plate is rotatably connected to an adjustment screw, which passes through the threaded barrel and is threadedly connected to the threaded barrel.

[0009] Optionally, the locking structure includes a floating plate, which is located above the adjusting plate. Two groups of limit sliders are symmetrically provided on the side of the floating plate. The limit sliders are integrally connected to the floating plate. Two groups of limit grooves are symmetrically provided on the inner wall of the liquid storage barrel. The limit slider structure is adapted to the limit groove structure. A locking rod is integrally connected to the center of the floating plate surface.

[0010] Optionally, the liquid collection structure includes a liquid collection box, a liquid inlet is provided on the side of the liquid collection box, a positioning shaft cylinder is fixed to the bottom of the liquid collection box, a connecting hole 1 is provided at the bottom of the liquid collection box, a connecting hole 2 is provided on the floating plate, connecting hole 1 and connecting hole 2 are sealed and connected by a bellows, a connecting edge is fixedly connected to the bottom of the liquid collection box, a thread is provided on the surface of the connecting edge, the liquid collection box is embedded in the top opening of the liquid storage barrel through the connecting edge and is threadedly connected to the liquid storage barrel, a sealing cover is covered at the top opening of the liquid collection box, the sealing cover is rotatably engaged with the liquid collection box, a rotating rod is fixedly connected to the top of the sealing cover, and the rotating rod is L-shaped.

[0011] Optionally, the liquid collection structure further includes a liquid collection member, which includes a central tube and a plurality of sealing blades evenly distributed around the central tube, the sealing blades are fixedly connected to the central tube, and the top of the central tube is fixedly connected to the bottom of the sealing cover.

[0012] Optionally, the sealing blade is in close contact with the inner surface of the sealing cover, and when the sealing cover is connected to the liquid collection box, the sealing blade is in close contact with the inner wall of the liquid collection box, and the central tube is sleeved outside the positioning shaft tube and is rotatably connected to the positioning shaft tube.

[0013] Optionally, the inner top plate of the central tube is provided with multiple groups of locking blocks 1, which are distributed in a circle and are integrally connected to the central tube, and the top of the locking block 1 is a curved surface structure; the locking rod is sleeved and connected to the positioning shaft tube, and the top of the locking rod is provided with multiple groups of locking blocks 2, which are distributed in a circle and are integrally connected to the locking rod, and the top of the locking block 2 is a curved surface structure.

[0014] Optionally, the liquid inlet structure includes an injection needle and an infusion tube, and the injection needle is sealedly connected to the liquid inlet through the infusion tube.

[0015] Compared with the prior art, the utility model has at least the following beneficial effects:

[0016] In the above scheme, by setting an adjustment structure, the adjustment structure can change the volume of the liquid storage barrel. The liquid extraction operator can set the volume of the liquid storage barrel to the required value before extracting the liquid. The operator does not need to deliberately calculate the volume of the extracted liquid during the liquid extraction process, which effectively improves the effect of extracting the liquid. The liquid extraction can be completed at one time without the need for the liquid extraction needle to be repeatedly inserted into the medicine bottle, which effectively reduces the risk of contamination of the medicine in the medicine bottle.

[0017] By setting a locking structure, the locking structure is simple, easy to install, and does not require regular maintenance, which effectively reduces medical costs. The liquid collection structure automatically locks the liquid collection part when the liquid collection volume reaches a set value, ending the liquid collection operation. The operation is simple and the liquid collection efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments of the present invention and, together with the description, further serve to explain the principles of the present invention and enable those skilled in the relevant art to make and use the present invention.

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the quantitative liquid discharger;

[0020] Figure 2 It is a schematic diagram of the partially cutaway structure of the quantitative liquid discharger;

[0021] Figure 3 This is a schematic diagram of the cutaway structure of the liquid storage barrel;

[0022] Figure 4 It is a schematic diagram of the liquid collection box structure;

[0023] Figure 5 It is a schematic diagram of the partial cutaway structure of the liquid taking part;

[0024] Figure 6 for Figure 5 The enlarged structural diagram at A in the middle;

[0025] Figure 7 It is a schematic diagram of the locking structure;

[0026] Figure 8 for Figure 7 Enlarged structural diagram at B in the middle.

[0027] [reference numerals]

[0028] 1. Liquid storage structure; 11. Liquid storage barrel; 12. Perspective window; 13. Scale bar; 14. Fixed bottom plate; 15. Threaded barrel; 16. Limiting slide groove; 2. Liquid extraction structure; 21. Liquid extraction box; 211. Positioning shaft barrel; 212. Connecting hole one; 213. Liquid inlet; 214. Connecting edge; 22. Sealing cover; 23. Rotating rod; 24. Liquid extraction part; 241. Center barrel; 242. Sealing blade; 243. Locking block one; 3. Liquid inlet structure; 31. Injection needle; 32. Infusion tube; 4. Adjustment structure; 41. Adjustment plate; 42. Adjustment screw; 5. Locking structure; 51. Floating plate; 52. Limiting slide block; 53. Connecting hole two; 54. Locking rod; 55. Locking block two; 6. Bellows.

[0029] As shown in the figure, in order to clearly implement the structure of the embodiment of the utility model, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the utility model to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0030] The following is a detailed description of a quantitative liquid discharger provided by the utility model in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the utility model.

[0031] It should be noted that the references to "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0032] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0033] It is to be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers, and “on” or “above” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers.

[0034] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0035] like Figure 1 and Figure 2 As shown, the embodiment of the utility model provides a quantitative liquid discharger, including a liquid storage structure 1, a liquid collection structure 2 is connected to the top of the liquid storage structure 1, a liquid inlet structure 3 is connected to the side of the liquid collection structure 2, the liquid inlet structure 3 includes an injection needle 31 and an infusion tube 32, the injection needle 31 is sealed with a liquid inlet 213 through the infusion tube 32, the liquid storage structure 1 includes a liquid storage barrel 11, a fixed bottom plate 14 is provided in the middle of the liquid storage barrel 11, the fixed bottom plate 14 is integrally connected to the liquid storage barrel 11, and two groups of limiting slide grooves 16 are symmetrically opened on the inner wall of the liquid storage barrel 11, A through hole is provided at the center of the surface of the fixed bottom plate 14, and a threaded tube 15 is integrally connected to the through hole on the outer surface of the fixed bottom plate 14. A perspective window 12 is provided on the side of the liquid storage barrel 11, and the perspective window 12 is sealed and covered by a transparent plate. A scale bar 13 is engraved on one side of the perspective window 12, and the bottom of the perspective window 12 is at least flush with the fixed bottom plate 14, so that the zero scale line of the scale bar 13 is flush with the upper surface of the fixed bottom plate 14. The position of the adjustment plate 41 can be observed through the perspective window 12, and the current volume of the liquid storage chamber can be clearly judged according to the scale bar 13, so that quantitative adjustment can be made as needed.

[0036] like Figure 2 and Figure 3 As shown, the liquid storage barrel 11 is provided with an adjustment structure 4 inside, and the adjustment structure 4 is connected to the fixed bottom plate 14, the adjustment structure 4 includes an adjustment plate 41, the adjustment plate 41 is located above the fixed bottom plate 14, the side of the adjustment plate 41 is in sealing contact with the inner wall of the liquid storage barrel 11, the bottom of the adjustment plate 41 is rotatably connected with an adjustment screw 42, the adjustment screw 42 passes through the threaded barrel 15 and is threadedly connected thereto, and by providing the adjustment plate 41 and the adjustment screw 42, a screw-nut connection is formed between the adjustment screw 42 and the threaded barrel 15. The adjusting plate 41 is sealed with the inner wall of the liquid storage barrel 11 to separate the inner wall of the liquid storage barrel 11 into two layers of cavities, and the position of the adjusting plate 41 can be adjusted to change the volume of the upper and lower cavities of the liquid storage barrel 11. The upper cavity of the adjusting plate 41 is a liquid storage cavity for storing liquid. The volume of the liquid storage cavity decreases as the adjusting plate 41 rises, and increases as the adjusting plate 41 falls, thereby realizing the function of quantitative liquid extraction.

[0037] like Figure 2 , Figure 7 and Figure 8 As shown, a locking structure 5 is provided inside the liquid storage barrel 11, and the locking structure 5 is located above the fixed bottom plate 14, and the locking structure 5 includes a floating plate 51, and the floating plate 51 is located above the adjusting plate 41, and two groups of limiting sliders 52 are symmetrically provided on the side of the floating plate 51, and the limiting sliders 52 are integrally connected to the floating plate 51, and the limiting slider 52 structure is adapted to the limiting slide groove 16 structure, and the floating plate 51 is made of a material with a relatively low density, and can float on the surface of the medicine, and rise as the liquid level of the medicine rises, and a locking rod 54 is integrally connected to the center of the surface of the floating plate 51, and when the floating plate 51 floats up and down, it will drive the locking rod 54 connected thereto to move synchronously, and when the locking rod 54 moves up to the upper opening of the liquid storage barrel 11, the top of the locking rod 54 will contact the top of the liquid extraction structure 2.

[0038] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the liquid taking structure 2 is arranged on the top of the liquid storage barrel 11 and connected thereto, the liquid taking structure 2 includes a liquid taking box 21, a liquid inlet 213 is provided on the side of the liquid taking box 21, a positioning shaft cylinder 211 is fixed to the bottom of the liquid taking box 21, a connecting hole 1 212 is provided at the bottom of the liquid taking box 21, a connecting hole 2 53 is provided on the floating plate 51, the connecting hole 1 212 and the connecting hole 2 53 are sealedly connected by a bellows 6, the liquid taking box 21 is connected to the liquid storage cavity of the liquid storage barrel 11 through the bellows 6 and through the floating plate 51, wherein the bellows 6 is retractable and can automatically adjust its length as the floating plate 51 moves up and down, so that the liquid taking box 21 and the liquid storage barrel 11 can always be connected.

[0039] A connecting edge 214 is fixedly connected to the bottom of the liquid collection box 21, and a thread is provided on the surface of the connecting edge 214. The liquid collection box 21 is embedded in the top opening of the liquid storage barrel 11 through the connecting edge 214 and is threadedly connected to it. The liquid collection box 21 and the liquid storage barrel 11 are detachably connected, which is convenient for pouring out the liquid in the liquid storage barrel 11. The liquid storage barrel 11 can be used as a container for a short time, and it is also convenient for cleaning the liquid storage barrel 11. A sealing cover 22 is covered at the top opening of the liquid collection box 21. The sealing cover 22 is rotatably engaged with the liquid collection box 21. A rotating rod 23 is fixedly connected to the top of the sealing cover 22. The rotating rod 23 is an L-shaped structure. The rotating rod 23 is convenient for driving the sealing cover 22 to rotate, thereby reducing the difficulty of rotating the sealing cover 22.

[0040] like Figures 4 to 6As shown, the liquid collection structure 2 also includes a liquid collection member 24, which includes a central tube 241 and a plurality of sealing blades 242 evenly distributed around the central tube 241, the sealing blades 242 are fixedly connected to the central tube 241, the top of the central tube 241 is fixedly connected to the bottom of the sealing cover 22, the liquid collection member 24 can rotate synchronously with the rotation of the sealing cover 22, and the liquid collection member 24 rotates relative to the liquid collection box 21 when the liquid collection member 24 rotates, the sealing blades 242 are tightly attached to the inner surface of the sealing cover 22, and when the sealing cover 22 is connected to the liquid collection box 21, the sealing blades 242 are tightly attached to the inner wall of the liquid collection box 21, and the central tube 241 is sleeved on the outside of the positioning shaft tube 211 and is rotatably connected to it.

[0041] The sealing blades 242 are sealedly connected to the inner walls of the liquid collection box 21 and the inner walls of the sealing cover 22. Multiple groups of sealing blades 242 separate the cavity of the liquid collection box 21 into several groups of sealed cavities. The sealed cavities can move with the rotation of the sealing blades 242. When the sealed cavity includes the position of the connecting hole 212, the group of sealed cavities is connected to the liquid storage barrel 11, and the liquid in the group of sealed cavities can enter the liquid storage barrel 11 through the bellows 6. When the sealed cavity includes the liquid inlet 213, the sealed cavity is connected to the liquid inlet structure 3. The sealing blades 242 rotate rapidly to generate vacuum negative pressure inside the liquid collection box 21, and the vacuum negative pressure can suck the liquid into the sealed cavity through the liquid inlet structure 3.

[0042] The inner top plate of the center tube 241 is provided with a plurality of locking blocks 243, which are distributed in a circle and are integrally connected to the center tube 241, and the top of the locking block 243 is a curved surface structure. The locking rod 54 can be sleeved and connected with the positioning shaft tube 211, and the top of the locking rod 54 is provided with a plurality of locking blocks 2 55, which are distributed in a circle and are integrally connected to the locking rod 54, and the top of the locking block 2 55 is a curved surface structure. When the floating plate 51 rises to the highest point with the liquid level of the medicine, the top of the locking rod 54 contacts the top of the center tube 241, and the locking block 2 55 at the top of the locking rod 54 contacts the locking block 1 243 at the top of the center tube 241 and interlaces with each other. The locking rod 54 locks the center tube 241, and then locks the liquid taking part 24 to complete the liquid taking operation.

[0043] The working principle of the utility model is as follows: when the medical staff quantitatively extracts the bottled medicine according to the patient's doctor's order, they first rotate the adjusting screw 42 to drive the adjusting plate 41 to move to the desired scale line against the scale bar 13, then insert the injection needle 31 into the medicine bottle and lead the medicine bottle, and then quickly rotate the rotating rod 23, the rotating rod 23 drives the sealing cover 22 to rotate, the sealing cover 22 drives the liquid taking part 24 to rotate, the sealing blade 242 in the liquid taking part 24 rotates to generate a negative pressure vacuum in the liquid taking box 21, the negative pressure vacuum absorbs the liquid in the medicine bottle into the liquid taking box 21 through the liquid inlet structure 3, and enters the cavity in the middle of the sealing blade 242, and as the sealing blade 242 rotates, the liquid is brought into The liquid is introduced into the liquid storage barrel 11 through the connecting hole 212 and the bellows 6. As the liquid level in the liquid storage barrel 11 rises, the float 51 rises with the increase of the liquid level. When the hollow cavity in the liquid storage barrel 11 is filled, the float 51 rises to the highest point. The locking rod 54 enters the interior of the central tube 241 as the float 51 rises and contacts the top of the central tube 241. After the locking block 255 at the top of the locking rod 54 is interlaced with the locking block 1 243 inside the central tube 241, the locking rod 54 locks the central tube 241, and then locks the liquid taking part 24. The liquid taking part 24 and the sealing cover 22 are locked synchronously, and the rotating rod 23 cannot drive the sealing cover 22 to continue to rotate. The operator stops the liquid taking operation and completes the liquid taking function.

[0044] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the preferred embodiment of the present invention, and the present invention can be fully understood by those skilled in the art without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A quantitative liquid discharger, characterized in that: include: A liquid storage structure, the liquid storage structure comprising a liquid storage barrel, a fixed bottom plate is provided in the middle of the liquid storage barrel, and the fixed bottom plate is integrally connected to the liquid storage barrel; A liquid taking structure, which is arranged on the top of the liquid storage barrel, and a liquid inlet structure is connected to the side of the liquid taking structure; An adjusting structure, which is arranged inside the liquid storage barrel and connected to the fixed bottom plate; The locking structure is arranged inside the liquid storage barrel and above the fixed bottom plate.

2. The quantitative liquid discharger according to claim 1, characterized in that: A through hole is provided at the center of the surface of the fixed bottom plate, a threaded tube is integrally connected to the through hole on the outer surface of the fixed bottom plate, a perspective window is provided on the side of the liquid storage barrel, the perspective window is sealed and covered by a transparent plate, and a scale bar is engraved on one side of the perspective window.

3. The quantitative liquid discharger according to claim 1, characterized in that: The adjusting structure comprises an adjusting plate, which is located above the fixed bottom plate, the side of the adjusting plate is in sealing contact with the inner wall of the liquid storage barrel, the bottom of the adjusting plate is rotatably connected with an adjusting screw, and the adjusting screw passes through the threaded barrel and is threadedly connected with the threaded barrel.

4. The quantitative liquid discharger according to claim 1, characterized in that: The locking structure includes a floating plate, which is located above the adjusting plate. Two groups of limit sliders are symmetrically arranged on the side of the floating plate. The limit sliders are integrally connected to the floating plate. Two groups of limit slide grooves are symmetrically opened on the inner wall of the liquid storage barrel. The limit slider structure is adapted to the limit slide groove structure. A locking rod is integrally connected to the center of the floating plate surface.

5. The quantitative liquid discharger according to claim 4, characterized in that: The liquid collection structure includes a liquid collection box, a liquid inlet is provided on the side of the liquid collection box, a positioning shaft cylinder is fixed on the bottom of the liquid collection box, a connecting hole 1 is provided on the bottom of the liquid collection box, a connecting hole 2 is provided on the floating plate, the connecting hole 1 and the connecting hole 2 are sealed and connected by a bellows, a connecting edge is fixedly connected to the bottom of the liquid collection box, a thread is provided on the surface of the connecting edge, the liquid collection box is embedded in the top opening of the liquid storage barrel through the connecting edge and is threadedly connected to the liquid storage barrel, a sealing cover is covered on the top opening of the liquid collection box, the sealing cover is rotatably engaged with the liquid collection box, a rotating rod is fixedly connected to the top of the sealing cover, and the rotating rod is in an L-shaped structure.

6. The quantitative liquid discharger according to claim 5, characterized in that: The liquid collection structure also includes a liquid collection member, which includes a central tube and a plurality of sealing blades evenly distributed around the central tube. The sealing blades are fixedly connected to the central tube, and the top of the central tube is fixedly connected to the bottom of the sealing cover.

7. The quantitative liquid discharger according to claim 6, characterized in that: The sealing blade is in close contact with the inner surface of the sealing cover. When the sealing cover is connected to the liquid collection box, the sealing blade is in close contact with the inner wall of the liquid collection box. The central cylinder is sleeved outside the positioning shaft cylinder and is rotatably connected to the positioning shaft cylinder.

8. The quantitative liquid discharger according to claim 6, characterized in that: The inner top plate of the central tube is provided with multiple groups of locking blocks 1, which are distributed in a circle and are integrally connected to the central tube, and the top of the locking block 1 is a curved surface structure; the locking rod is sleeved and connected to the positioning shaft tube, and the top of the locking rod is provided with multiple groups of locking blocks 2, which are distributed in a circle and are integrally connected to the locking rod, and the top of the locking block 2 is a curved surface structure.

9. The quantitative liquid discharger according to claim 1, characterized in that: The liquid inlet structure comprises an injection needle and an infusion tube, and the injection needle is sealedly connected to the liquid inlet through the infusion tube.

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