Seed transferring device

Abstract

The seed transferring device comprises a cylinder, a needle cylinder, a first duckbill valve, a piston assembly and a second duckbill valve, and a connecting part is arranged on the inner wall of one end of the cylinder; an elastic piece is arranged between one end of the needle cylinder and the inner wall of the stepped through hole or the connecting part or the cylinder, and a needle head is connected to the other end of the needle cylinder; the first duckbill valve can close the other end of the needle cylinder in one direction; the piston assembly is provided with a liquid outlet channel, one end of the piston assembly abuts against the inner wall of the stepped through hole or the connecting part, and the other end of the piston assembly is arranged in an inner cavity of the needle cylinder. The second duckbill valve can close the liquid outlet channel in a one-way mode. The needle head is inserted into a culture bottle and other containers, and the blood sample enters the needle cylinder; when the needle continues to extrude containers such as a culture bottle, the first duckbill valve is closed, the second duckbill valve is opened, and the blood sample in the needle cylinder is discharged in an accelerated manner; and when the needle head stops puncturing into or being pulled out of containers such as a culture bottle, the second duckbill valve is closed, the first duckbill valve is opened, and the blood sample in the needle cylinder stops being discharged.

Description

Technical Field

[0001] The utility model relates to the technical field of testing consumables, in particular to a seed converter. Background Art

[0002] In medical services, blood culture can identify bacteria and other culturable microorganisms. The detection of microorganisms has important clinical significance for the diagnosis and treatment of infectious diseases. The steps include inoculating blood into a culture bottle, then placing the culture bottle in an incubator for culturing to obtain a blood sample, and then transferring the blood sample to a plate and performing a drug sensitivity test to obtain the effect of the drug sensitivity test. When transferring blood samples, a transfer device is required. The current transfer device has a simple structure and is not easy to control the start and stop of blood sample transfer when used. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a seed converter, which is simple to use, easy to control and has high reliability.

[0004] A seed converter according to an embodiment of the utility model comprises a cylinder, a syringe, a first duckbill valve, a piston assembly and a second duckbill valve; a connecting portion is provided on the inner wall of one end of the cylinder, a stepped through hole is provided on the connecting portion, and the stepped through hole communicates with both ends of the cylinder; the syringe is arranged in the cylinder, an elastic member is provided between one end of the syringe and the inner wall of the stepped through hole or the connecting portion or the cylinder, and a needle is connected to the other end of the syringe; the first duckbill valve is made of a flexible material, the first duckbill valve is arranged in the inner cavity of the other end of the syringe, and the inlet end of the first duckbill valve is communicated with the needle cavity of the needle , the outlet end of the first duckbill valve is connected to the inner cavity of the syringe, and the first duckbill valve can unidirectionally close the other end of the syringe; a liquid outlet channel is provided on the piston assembly, one end of the piston assembly is against the inner wall of the stepped through hole or the connecting portion, and the other end of the piston assembly is arranged in the inner cavity of the syringe; the second duckbill valve is made of flexible material, the second duckbill valve is arranged in the liquid outlet channel, the inlet end of the second duckbill valve is connected to the inner cavity of the syringe, the outlet end of the second duckbill valve is connected to the liquid outlet channel and the stepped through hole, and the second duckbill valve can unidirectionally close the liquid outlet channel.

[0005] The invention has at least the following beneficial effects: the needle, the first duckbill valve, the syringe, the second duckbill valve, the liquid outlet channel and the stepped through hole form a channel for transferring the blood sample. When the needle is inserted into a container such as a culture bottle, the blood sample enters the syringe, and when the needle continues to squeeze the container such as the culture bottle, the first duckbill valve is closed, the second duckbill valve is opened, and the blood sample in the syringe is accelerated to be discharged through the second duckbill valve, the liquid outlet channel and the stepped through hole; and when the seed transfer device stops being inserted into a container such as a culture bottle or is pulled out of a container such as a culture bottle, the space surrounded by the syringe and the piston assembly remains unchanged in size, the internal pressure of the syringe remains unchanged, the second duckbill valve is closed, the first duckbill valve is opened, and the blood sample in the syringe stops being discharged. Therefore, even if the seed transfer device is used in a tilted state, it can be ensured that the seed transfer device can only transfer the blood sample in one direction when in use, the method of use is simple, the steps are few and the operation is easy, the transfer of the blood sample is convenient to control, and the reliability is high.

[0006] According to some embodiments of the present invention, the inlet end of the first duckbill valve is in a circular tube shape, and the outlet end of the first duckbill valve is in a flat shape.

[0007] According to some embodiments of the utility model, an annular protrusion is provided on the outer circular surface of the inlet end of the first duckbill valve, and an annular limiting groove is provided on the end surface of the other end of the syringe, and the annular protrusion is arranged in the annular limiting groove.

[0008] According to some embodiments of the utility model, the stepped through hole includes a first section, a second section and a third section which are connected in sequence, the diameters of the first section, the second section and the third section decrease in sequence, one end of the syringe is passed through the first section, one end of the syringe can be abutted against a first step surface formed between the first section and the second section, one end of the piston assembly abuts against a second step surface formed between the second section and the third section, one end of the elastic member abuts against the first step surface or the second step surface, and the other end of the elastic member abuts against one end of the syringe.

[0009] According to some embodiments of the utility model, an end cover of the syringe is provided with an end cover, and the end cover is provided with a mounting hole connected to the inner cavity of the syringe, the piston assembly includes a piston and a piston rod, the piston is provided in the inner cavity of the syringe, one end of the piston rod is passed through the mounting hole, one end of the piston rod extends to the outside of the syringe and rests on the second step surface, the other end of the piston rod is connected to the piston, the piston is provided with a first through hole, and the piston rod is provided with a second through hole, and the first through hole and the second through hole constitute the liquid outlet channel.

[0010] According to some embodiments of the present invention, the elastic member is a spring, and the elastic member is sleeved on one end of the piston rod.

[0011] According to some embodiments of the utility model, the outer circular surface of one end of the end cover is provided with a first flange, the first flange abuts against the end surface of one end of the syringe, and the outer circular surface of the other end of the end cover and the inner wall of one end of the syringe are connected through mutually matching convex rings and grooves.

[0012] According to some embodiments of the utility model, a second flange is provided on the outer circular surface of one end of the syringe, and a limiting protrusion is provided on the inner wall of the first section, and the limiting protrusion is used to limit the second flange within the first section.

[0013] According to some embodiments of the utility model, a guide frame is provided on the other end of the syringe, the needle is connected to the other end of the syringe through the guide frame, and the needle cavity of the needle is connected to the inlet end of the first duckbill valve.

[0014] According to some embodiments of the present invention, one end of the needle is connected to the guide frame, the other end of the needle is a pointed tip, and a side wall of the needle is provided with a plurality of needle holes along the length direction of the needle.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0017] Figure 1 This is a structural schematic diagram of a seed converter according to an embodiment of the utility model;

[0018] Figure 2 This is a schematic cross-sectional view of a seed converter according to an embodiment of the utility model;

[0019] Figure 3 for Figure 2 A local enlarged schematic diagram of the A in FIG.

[0020] Figure 4 This is a schematic diagram of the structure of a first duckbill valve in a seed converter according to an embodiment of the utility model;

[0021] Figure 5 This is a schematic structural diagram of a syringe, an elastic member, a guide frame and a needle in a seed converter according to an embodiment of the utility model;

[0022] Figure Number:

[0023] Cylinder 100; connecting portion 110; stepped through hole 200; first section 210; limiting protrusion 211; second section 220; third section 230; syringe 300; needle 310; end cover 320; mounting hole 321; first flange 322; second flange 330; guide frame 340; elastic member 400; first duckbill valve 500; piston assembly 600; piston 610; piston rod 620; third flange 621; liquid outlet channel 700; second duckbill valve 800. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0027] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0028] Reference Figures 1 to 3The utility model discloses a seed converter, including a cylinder 100, a syringe 300, a first duckbill valve 500, a piston assembly 600 and a second duckbill valve 800. A connecting portion 110 is provided on the inner wall of one end of the cylinder 100, and a stepped through hole 200 is provided on the connecting portion 110. The stepped through hole 200 communicates with both ends of the cylinder 100. The syringe 300 is arranged in the cylinder 100, and an elastic member 400 is provided between one end of the syringe 300 and the inner wall of the stepped through hole 200 or the connecting portion 110 or the cylinder 100. A needle 310 is connected to the other end of the syringe 300. The first duckbill valve 500 is made of a flexible material, and the first duckbill valve 500 is arranged in the inner cavity of the other end of the syringe 300. The inlet end of the first duckbill valve 500 is connected to the inner cavity of the other end of the syringe 300. The needle cavity of the needle 310 is connected, the outlet end of the first duckbill valve 500 is connected to the inner cavity of the syringe 300, and the first duckbill valve 500 can unidirectionally close the other end of the syringe 300; a liquid outlet channel 700 is provided on the piston assembly 600, one end of the piston assembly 600 is against the inner wall or the connecting part 110 of the stepped through hole 200, and the other end of the piston assembly 600 is arranged in the inner cavity of the syringe 300; the second duckbill valve 800 is made of flexible material, the second duckbill valve 800 is arranged in the liquid outlet channel 700, the inlet end of the second duckbill valve 800 is connected to the inner cavity of the syringe 300, the outlet end of the second duckbill valve 800 is connected to the liquid outlet channel 700 and the stepped through hole 200, and the second duckbill valve 800 can unidirectionally close the liquid outlet channel 700.

[0029] The connecting portion 110 of the cylinder 100 supports the piston assembly 600, and the connecting portion 110 supports the syringe 300 through the elastic member 400. The needle 310, the first duckbill valve 500, the syringe 300, the second duckbill valve 800, the liquid outlet channel 700 and the stepped through hole 200 form a channel for transferring blood samples. The first duckbill valve 500 and the second duckbill valve 800 are both made of flexible materials, which are easy to deform to close the valve cavity. Since the first duckbill valve 500 and the second duckbill valve 800 are both duckbill-shaped, under negative pressure, the outlet end of the first duckbill valve 500 is closed earlier than the inlet end, and the outlet end of the second duckbill valve 800 is closed earlier than the inlet end, thereby realizing the one-way closing function.

[0030] When transferring the seed, the cylinder 100 can be held by hand, the needle 310 is directed toward a container such as a culture bottle, and then the needle 310 is inserted into the container such as the culture bottle, and the blood sample enters the space surrounded by the syringe 300 and the piston assembly 600 through the needle 310, and the needle 310 continues to be inserted into the container such as the culture bottle, or the needle 310 is directly pressed by an external force, and the needle 310 is subjected to a reaction force, and the needle 310 drives the syringe 300 to move, and the syringe 300 compresses the elastic member 400, and the syringe 300 and the piston assembly 600 cooperate to reduce the space surrounded by the syringe 300 and the piston assembly 600 and increase the pressure. The other end of the syringe 300 can be closed unidirectionally, and the second duckbill valve 800 can unidirectionally close the liquid outlet channel 700, so the first duckbill valve 500 will be closed, the second duckbill valve 800 will be opened, and the blood sample in the syringe 300 will be accelerated to be discharged through the second duckbill valve 800, the liquid outlet channel 700 and the stepped through hole 200; and when the seed transfer device stops being inserted into or removed from a container such as a culture bottle, the size of the space surrounded by the syringe 300 and the piston assembly 600 remains unchanged, and the internal pressure of the syringe 300 remains unchanged, the second duckbill valve 800 is closed, the first duckbill valve 500 is opened, and the blood sample in the syringe 300 stops being discharged. Even when the seed transfer device is used in a tilted state, it can be ensured that the seed transfer device can only transfer blood samples unidirectionally when in use. The method of use is simple, the steps are few, and it is easy to operate, which is convenient for controlling the transfer of blood samples and has high reliability.

[0031] See also Figure 2 and Figure 4 The inlet end of the first duckbill valve 500 is in a circular tube shape, and the outlet end of the first duckbill valve 500 is flat. The inner cavity cross-sectional area of ​​the inlet end is larger than the inner cavity cross-sectional area of ​​the outlet end. The inlet end has greater deformation resistance than the outlet end, and two opposite planes are provided at the outlet end. Therefore, when negative pressure occurs, the outlet end is closed compared to the inlet end, thereby avoiding the backflow of blood samples at the first duckbill valve 500.

[0032] See also Figure 2 and Figure 4 In some of the embodiments, an annular protrusion is provided on the outer circular surface of the inlet end of the first duckbill valve 500, and an annular limiting groove is provided on the end face of the other end of the syringe 300. The annular protrusion is arranged in the annular limiting groove. The annular limiting groove serves to receive and limit the annular protrusion, thereby limiting the inlet end of the first duckbill valve 500 to the end face of the other end of the syringe 300, and the outlet end of the first duckbill valve 500 extends into the inner cavity of the syringe 300, which can avoid interference between the first duckbill valve 500 and other structures outside the syringe 300.

[0033] It is conceivable that the structure of the second duckbill valve 800 is the same as that of the first duckbill valve 500 , and both the outlet end of the second duckbill valve 800 and the outlet end of the first duckbill valve 500 face one end of the cylinder 100 .

[0034] See also Figure 3 In some embodiments, the stepped through hole 200 includes a first section 210, a second section 220 and a third section 230 which are connected in sequence, and the diameters of the first section 210, the second section 220 and the third section 230 decrease in sequence. One end of the syringe 300 is passed through the first section 210, and one end of the syringe 300 can be against a first step surface formed between the first section 210 and the second section 220. The first step surface limits the travel of the syringe 300 toward one end of the cylinder 100.

[0035] One end of the piston assembly 600 is against the second step surface formed between the second section 220 and the third section 230, and the second step surface serves to push the piston assembly 600. When the cylinder 100 drives the needle 310 to insert into a container such as a culture bottle, the cylinder 100 carries the piston assembly 600 to move together. Since the needle 310 is subjected to a reverse force, the needle 310 and the syringe 300 move toward the direction close to the piston assembly 600, so that the pump composed of the syringe 300 and the piston assembly 600 serves to pump blood samples.

[0036] One end of the elastic member 400 abuts against the first step surface or the second step surface, and the other end of the elastic member 400 abuts against one end of the syringe 300. The elastic member 400 pushes the syringe 300, so that the pump composed of the syringe 300 and the piston assembly 600 can pump blood samples in containers such as culture bottles.

[0037] It should be understood that for the pump composed of the syringe 300 and the piston assembly 600 to work, when the elastic member 400 is in the extended state, it is necessary to ensure that a certain distance is maintained between one end of the syringe 300 and the first step surface. One end of the syringe 300 can be against the first step surface to prevent the syringe 300 from having an excessive stroke, thereby preventing the elastic member 400 from being irreversibly deformed and failing due to the over-stroke movement of the syringe 300.

[0038] See also Figure 2 and Figure 3 In some embodiments, an end cover 320 is provided at one end of the syringe 300, and a mounting hole 321 communicating with the inner cavity of the syringe 300 is provided on the end cover 320. The piston assembly 600 includes a piston 610 and a piston rod 620. The piston 610 is provided in the inner cavity of the syringe 300, and one end of the piston rod 620 is passed through the mounting hole 321. One end of the piston rod 620 extends to the outside of the syringe 300 and rests on the second step surface. The other end of the piston rod 620 is connected to the piston 610. A first through hole is provided on the piston 610, and a second through hole is provided on the piston rod 620. The first through hole and the second through hole constitute a liquid outlet channel 700.

[0039] The end cover 320 serves to limit and guide the piston rod 620, so that the syringe 300, the piston 610 and the piston rod 620 are on the same axis, and when the piston 610 and the piston rod 620 slide relative to the syringe 300, the sealing between the circumference of the piston 610 and the inner wall of the syringe 300 can be ensured.

[0040] See also Figure 3 and Figure 5 In some of the embodiments, the elastic member 400 is a spring, and the elastic member 400 is sleeved on one end of the piston rod 620 , and the piston rod 620 serves as a limit for the elastic member 400 .

[0041] In some of the embodiments, the outer circular surface of one end of the end cover 320 is provided with a first flange 322, and the first flange 322 abuts against the end surface of one end of the syringe 300. The outer circular surface of the other end of the end cover 320 and the inner wall of one end of the syringe 300 are connected through mutually matching convex rings and grooves. The first flange 322 can prevent the entire end cover 320 from being inserted into the inner cavity of the syringe 300. The setting of the convex ring and the groove can also prevent the entire end cover 320 from being inserted into the inner cavity of the syringe 300. The setting of the convex ring and the groove also ensures the sealing between the peripheral side of the end cover 320 and the inner wall of the syringe 300.

[0042] In some of the embodiments, a second flange 330 is provided on the outer circular surface of one end of the syringe 300, and a limiting protrusion 211 is provided on the inner wall of the first section 210. The second flange 330 is located between the limiting protrusion 211 and the first step surface. The limiting protrusion 211 can prevent the syringe 300 and the second flange 330 from completely withdrawing from the first section 210, that is, the limiting protrusion 211 limits the second flange 330 within the first section 210.

[0043] See also Figure 3 and Figure 5 It can be understood that a third flange 621 is provided on the outer circular surface of the end of one end of the piston rod 620, one end of the elastic member 400 abuts against the end cover 320, the elastic member 400 acts on one end of the syringe 300 through the end cover 320, the other end of the elastic member 400 abuts against the third flange 621, and the third flange 621 abuts against the second step surface.

[0044] See also Figure 1 , Figure 2 and Figure 5In some of the embodiments, a guide frame 340 is provided on the other end of the syringe 300, and the needle 310 is connected to the other end of the syringe 300 through the guide frame 340. The needle 310 is fixed on the guide frame 340, and the needle cavity of the needle 310 is connected to the inlet end of the first duckbill valve 500. When the needle 310 moves, it drives the guide frame 340 to move. The peripheral side of the guide frame 340 abuts against the inner wall of the cylinder 100. The guide frame 340 moves along the inner wall of the cylinder 100, which can prevent the needle 310 and the syringe 300 from deflecting or swinging.

[0045] It can be understood that a connecting hole is provided at one end of the guide frame 340, the needle cavity of the needle 310 is connected to the connecting hole, the guide frame 340 is sleeved on the other end of the syringe 300, and the connecting hole and the other end of the syringe 300 are interference fit.

[0046] In some of the embodiments, one end of the needle 310 is connected to the guide frame 340, and the other end of the needle 310 is a pointed tip. When the pointed tip is inserted into a container such as a culture bottle, the resistance encountered can be reduced. The side wall of the needle 310 is provided with multiple needle holes along the length direction of the needle 310, and the blood sample can smoothly enter the needle cavity of the needle 310 and the inner cavity of the syringe 300 through the multiple needle holes.

[0047] It can be understood that the cylinder 100, the syringe 300, the first duckbill valve 500, the piston 610, the piston rod 620, the second duckbill valve 800, the stepped through hole 200, the liquid outlet channel 700, the end cover 320, the elastic member 400 and the guide frame 340 are coaxially arranged.

[0048] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] Of course, the present invention is not limited to the above-mentioned embodiments, and technicians familiar with the field may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A seed converter, characterized in that: include: A cylinder, wherein a connecting portion is provided on the inner wall of one end, and a stepped through hole is provided on the connecting portion, and the stepped through hole connects the two ends of the cylinder; A syringe is arranged in the cylinder, an elastic member is arranged between one end of the syringe and the inner wall of the stepped through hole or the connecting part or the cylinder, and a needle is connected to the other end of the syringe; A first duckbill valve is made of a flexible material, the first duckbill valve is arranged in the inner cavity of the other end of the syringe, the inlet end of the first duckbill valve is communicated with the needle cavity of the needle, the outlet end of the first duckbill valve is communicated with the inner cavity of the syringe, and the first duckbill valve can unidirectionally close the other end of the syringe; A piston assembly is provided with a liquid outlet channel, one end of the piston assembly is against the inner wall of the stepped through hole or the connecting portion, and the other end of the piston assembly is arranged in the inner cavity of the syringe; The second duckbill valve is made of flexible material. The second duckbill valve is arranged in the liquid outlet channel. The inlet end of the second duckbill valve is connected to the inner cavity of the syringe. The outlet end of the second duckbill valve is connected to the liquid outlet channel and the stepped through hole. The second duckbill valve can close the liquid outlet channel in one direction.

2. A seed converter according to claim 1, characterized in that: The inlet end of the first duckbill valve is in a circular tube shape, and the outlet end of the first duckbill valve is in a flat shape.

3. A seed converter according to claim 1, characterized in that: An annular protrusion is provided on the outer circular surface of the inlet end of the first duckbill valve, and an annular limiting groove is provided on the end surface of the other end of the syringe, and the annular protrusion is arranged in the annular limiting groove.

4. A seed converter according to claim 1, characterized in that: The stepped through hole includes a first section, a second section and a third section which are connected in sequence, and the diameters of the first section, the second section and the third section decrease in sequence. One end of the syringe is passed through the first section, and one end of the syringe can be abutted against a first step surface formed between the first section and the second section. One end of the piston assembly abuts against a second step surface formed between the second section and the third section. One end of the elastic member abuts against the first step surface or the second step surface, and the other end of the elastic member abuts against one end of the syringe.

5. A seed converter according to claim 4, characterized in that: An end cover of the syringe is provided with an end cover, and a mounting hole connected to the inner cavity of the syringe is provided on the end cover. The piston assembly includes a piston and a piston rod. The piston is provided in the inner cavity of the syringe, and one end of the piston rod is passed through the mounting hole. One end of the piston rod extends out of the syringe and abuts against the second step surface. The other end of the piston rod is connected to the piston. A first through hole is provided on the piston, and a second through hole is provided on the piston rod. The first through hole and the second through hole constitute the liquid outlet channel.

6. A seed converter according to claim 5, characterized in that: The elastic member is a spring, and the elastic member is sleeved on one end of the piston rod.

7. A seed converter according to claim 5, characterized in that: The outer circular surface of one end of the end cover is provided with a first flange, which abuts against the end surface of one end of the syringe, and the outer circular surface of the other end of the end cover and the inner wall of one end of the syringe are connected through a convex ring and a groove that cooperate with each other.

8. A seed converter according to claim 4, characterized in that: A second flange is provided on the outer circular surface of one end of the syringe, and a limiting protrusion is provided on the inner wall of the first section, and the limiting protrusion is used to limit the second flange in the first section.

9. A seed converter according to claim 1, characterized in that: A guide frame is provided on the other end of the syringe, the needle is connected to the other end of the syringe through the guide frame, and the needle cavity of the needle is communicated with the inlet end of the first duckbill valve.

10. A seed converter according to claim 9, characterized in that: One end of the needle is connected to the guide frame, the other end of the needle is a pointed tip, and a side wall of the needle is provided with a plurality of needle openings along the length direction of the needle.

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