Anti-blocking device for trace sampling needle

Abstract

The utility model discloses an anti-blocking device for a trace sampling needle, which relates to the technical field of sampling needles and comprises a needle cylinder and a needle head, a push rod is arranged in the needle cylinder, a rotating handle is fixedly arranged at one end of the needle head, a connecting ring is fixedly connected to one side of the rotating handle, a connecting hole is arranged on the peripheral side of the connecting ring, and one end of the needle head is rotatably mounted in a rotating groove. The rotating groove is formed in one end of the connecting piece, a fixing ring is fixedly installed on the outer side of the connecting piece, a guide rod is slidably installed on the fixing ring in a penetrating mode, one end of the guide rod is connected with the fixing ring through a spring, a movable ring is fixedly installed at the other end of the guide rod, the movable ring is slidably installed on the connecting piece, and a connecting block is fixedly installed on the movable ring. According to the utility model, the connection block is matched with the connection hole, and the rotation of the needle head is blocked by the connection block, so that the relative stability between the needle head and the connection piece is kept, and the dislocation between the needle head and the connection piece is avoided.

Description

Technical Field

[0001] This utility model relates to the field of sampling needle technology, specifically a micro-sampling needle anti-clogging device. Background Technology

[0002] A sampling needle is a precision tool widely used in laboratories, especially in clinical laboratories. It is typically a long, thin needle-shaped instrument, usually made of stainless steel or special plastic, with a hollow channel inside, which can accurately draw and dispense liquid samples or reagents. In blood testing, a sampling needle is used to draw a certain amount of blood from a blood collection tube and then transfer it to a specific testing container or instrument.

[0003] Chinese utility model patent application number 202122390391.0 provides a sample injector for preventing needle blockage in the determination of total carbon in chlorosilanes. By rotatably connecting the needle tube and by setting a first guide hole and a second guide hole, the first guide hole can be connected to different second guide holes to realize multiple delivery routes for sample injection, thereby reducing the probability of needle blockage and ensuring work efficiency.

[0004] However, during the use of the above-mentioned equipment, it was found that although the first and second marking lines can be used to correspond the flow guide holes, the first and second flow guide holes are prone to misalignment when the needle tube deflects during the delivery process, which affects the delivery effect. Operators need to pay attention to the correspondence between the first and second marking lines at all times. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a micro-volume sampling needle anti-clogging device, which solves the problem mentioned in the background technology that when the needle tube deflects, the first guide hole and the second guide hole are easily misaligned, thus affecting the delivery effect, and requiring operators to constantly monitor the correspondence between the first and second marking lines.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a micro-volume sampling needle anti-clogging device, comprising a syringe and a needle tip. A push rod is disposed inside the syringe. A rotating handle is fixedly disposed at one end of the needle tip. A connecting ring is fixedly connected to one side of the rotating handle. A connecting hole is formed on the circumference of the connecting ring. One end of the needle tip is rotatably mounted in a rotating groove, which is located at one end of a connecting member. A fixing ring is fixedly mounted on the outer side of the connecting member. A guide rod is slidably mounted through the fixing ring. One end of the guide rod is connected to the fixing ring via a spring. A movable ring is fixedly mounted at the other end of the guide rod. The movable ring is slidably mounted on the connecting member. A connecting block is fixedly mounted on the movable ring, and the connecting block is adapted to the connecting hole.

[0007] Preferably, the needle has multiple drainage tubes I, and the connector has drainage tube II inside, with each drainage tube II corresponding to a single drainage tube I.

[0008] Preferably, the connector has an internal mounting groove that is connected to the second drainage pipe, which is flared in shape.

[0009] Preferably, one end of the syringe is fixedly connected to a connector, and a corresponding block is fixedly installed on the connector.

[0010] Preferably, the mounting groove is connected to the connector, and the connector has a connecting groove on one end near the syringe, which is connected to the corresponding block.

[0011] This invention provides a device to prevent clogging of a micro-volume sampling needle. It has the following beneficial effects:

[0012] (1) This utility model adapts the connecting block to the connecting hole and uses the connecting block to block the rotation of the needle, thereby maintaining the relative stability between the needle and the connecting part and avoiding misalignment between the needle and the connecting part.

[0013] (2) By setting up a funnel-shaped drainage tube II, the large opening of the funnel-shaped drainage tube II has a large opening area, which reduces the possibility of cells and other substances accumulating in the drainage tube II and causing blockage.

[0014] This solves the problem that when the syringe deflects, the first and second guide holes are easily misaligned, which affects the delivery effect and requires operators to constantly monitor the correspondence between the first and second marking lines. Attached Figure Description

[0015] Figure 1 This is an exploded view of the overall structure of this utility model;

[0016] Figure 2 This utility model Figure 1 A structural diagram of the central needle tip;

[0017] Figure 3 This utility model Figure 1 A diagram illustrating the structure of the syringe.

[0018] Figure 4 This utility model Figure 1 Structural diagram of the connecting component;

[0019] Figure 5 This utility model Figure 4 A diagram showing the internal structure of the connecting component.

[0020] In the diagram, 1. Syringe; 11. Connector; 12. Corresponding block; 2. Connector; 21. Connecting groove; 22. Drainage tube two; 23. Rotating groove; 24. Moving ring; 241. Connecting block; 25. Fixing ring; 26. Guide rod; 27. Spring; 28. Mounting groove; 3. Needle; 31. Rotating handle; 32. Connecting ring; 321. Connecting hole; 33. Drainage tube one; 4. Push rod. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0022] Example 1:

[0023] Please see Figures 1-5 A micro-volume sampling needle anti-clogging device includes a syringe 1 and a needle 3. A push rod 4 is provided inside the syringe 1. A rotating handle 31 is fixedly provided at one end of the needle 3. A connecting ring 32 is fixedly connected to one side of the rotating handle 31. A connecting hole 321 is provided on the periphery of the connecting ring 32. One end of the needle 3 is rotatably installed in a rotating groove 23. The rotating groove 23 is provided on one end of a connector 2. A fixing ring 25 is fixedly installed on the outer side of the connector 2. A guide rod 26 is slidably installed through the fixing ring 25. One end of the guide rod 26 is connected to the fixing ring 25 through a spring 27. A movable ring 24 is fixedly installed at the other end of the guide rod 26. The movable ring 24 is slidably installed on the connector 2. A connecting block 241 is fixedly installed on the movable ring 24. The connecting block 241 is adapted to the connecting hole 321.

[0024] The needle 3 has multiple drainage tubes 33, and the connector 2 has a drainage tube 22 inside, which corresponds to a single drainage tube 33.

[0025] Specifically, during sample application, each drainage tube 33 corresponds to a drainage tube 22. The user controls the movement of the push rod 4 to allow the sample to flow from the drainage tube 33 into the drainage tube 22. If the drainage tube 33 becomes blocked during the process of the sample entering the drainage tube 22, the user controls the moving ring 24 to move towards the fixed ring 25, causing the guide rod 26 to slide within the fixed ring 25. This causes the spring 27 to be stretched by an external force. The connecting block 241 is removed from the connecting hole 321, which makes it easier for the user to control the rotation of the needle 3. When the other drainage tube 33 in the needle 3 corresponds to the drainage tube 22, the user releases the moving ring 24, so that the spring 27 loses its external force restriction, and then returns to its original state and pushes the moving ring 24 to move the connecting block 241 towards the connecting hole 321, thereby causing the connecting block 241 to enter the connecting hole 321, thereby restricting the needle 3 and preventing the needle 3 from deflecting.

[0026] By using multiple drainage tubes 33 corresponding to drainage tubes 22 respectively, even if a drainage tube 33 is blocked by impurities, the sample addition operation can still be continued by switching to other normal drainage tubes 33, ensuring the continuity of the work; the connecting hole 321 corresponds to the drainage tube 33, and when the connecting block 241 is connected to the connecting hole 321, it can ensure that the corresponding drainage tube 33 and drainage tube 22 are connected.

[0027] Example 2:

[0028] To achieve connectivity between connector 2 and syringe 1, please refer to [link / reference]. Figures 1-5 Based on embodiment 1, the connector 2 has an installation groove 28 inside, which is connected to the second drainage pipe 22, which is funnel-shaped.

[0029] One end of the syringe 1 is fixedly connected to a connector 11, and a corresponding block 12 is fixedly installed on the connector 11.

[0030] The mounting slot 28 is connected to the connector 11. The connector 2 has a connecting slot 21 on one end near the syringe 1. The connecting slot 21 is connected to the corresponding block 12.

[0031] Specifically, the corresponding block 12 on connector 11 is connected to the connecting groove 21 on connector 2, which makes the connection between syringe 1 and connector 2 more precise and stable, avoiding misalignment and loosening during connection. The mounting groove 28 is connected to the second drainage tube 22, further improving the fluid channel inside connector 2. Through the connection with the second drainage tube 22, it is ensured that the sample can be smoothly transferred in connector 2 and enter syringe 1. The second drainage tube 22 is funnel-shaped, with the diameter gradually increasing from the inlet to the outlet. The large diameter tube can accommodate larger particles, and the sample flowing in from the small diameter inlet is less likely to cause blockage in the second drainage tube 22.

[0032] Working principle: Align the corresponding block 12 on the connector 11 at one end of the syringe 1 with the connecting groove 21 on the connector 2, so that they are connected accordingly. Ensure that the corresponding block 12 is accurately inserted into the connecting groove 21. This will form a stable connection between the syringe 1 and the connector 2, and prevent misalignment and loosening during use.

[0033] When sample addition is required, the user pushes the plunger 4 within the syringe 1, allowing the sample to flow from drainage tube 33 into drainage tube 22. Drainage tube 22 is funnel-shaped, with its diameter gradually increasing from the inlet to the outlet. The larger outlet diameter allows for the passage of larger particles, helping to prevent sample blockage. However, if a blockage is detected in drainage tube 33, the user initiates a drainage tube switching operation. The user manually moves the moving ring 24 towards the fixed ring 25. At this time, the guide rod 26 slides within the fixed ring 25, and the spring 27 is stretched by external force. The connecting block 241 moves out of the connecting hole 321. After the connecting block 241 is removed, the user can rotate the needle 3 to add another drainage tube. The unblocked drainage tube 33 is rotated to the position corresponding to the drainage tube 22. When the other drainage tube 33 is rotated into place and accurately corresponds to the drainage tube 22, the user releases the moving ring 24. After the spring 27 loses its external force restriction, it returns to its original state and pushes the moving ring 24 to move the connecting block 241 towards the connecting hole 321, so that the connecting block 241 re-enters the connecting hole 321, thereby restricting the needle 3, ensuring its stable position, and preventing the needle 3 from deflecting. After completing the above operation, the new drainage tube 33 can be used to continue the sample addition operation to ensure the continuity of work.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A micro-volume sampling needle anti-clogging device, comprising a syringe barrel (1) and a needle tip (3), wherein a push rod (4) is provided inside the syringe barrel (1), characterized in that: One end of the needle (3) is fixedly provided with a rotating handle (31), and a connecting ring (32) is fixedly connected to one side of the rotating handle (31). A connecting hole (321) is opened on the periphery of the connecting ring (32). One end of the needle (3) is rotatably installed in a rotating groove (23). The rotating groove (23) is opened on one end of the connector (2). A fixing ring (25) is fixedly installed on the outer side of the connector (2). A guide rod (26) is slidably installed through the fixing ring (25). One end of the guide rod (26) is connected to the fixing ring (25) through a spring (27). A moving ring (24) is fixedly installed on the other end of the guide rod (26). The moving ring (24) is slidably installed on the connector (2). A connecting block (241) is fixedly installed on the moving ring (24). The connecting block (241) is adapted to the connecting hole (321).

2. The anti-clogging device for a micro-volume sampling needle according to claim 1, characterized in that: The needle (3) has multiple drainage tubes (33), and the connector (2) has drainage tubes (22) inside, which correspond to a single drainage tube (33).

3. The anti-clogging device for a micro-volume sampling needle according to claim 2, characterized in that: The connector (2) has an installation groove (28) inside, which is connected to the second drainage pipe (22), which is horn-shaped.

4. The anti-clogging device for a micro-volume sampling needle according to claim 3, characterized in that: One end of the syringe (1) is fixedly connected to a connector (11), and a corresponding block (12) is fixedly installed on the connector (11).

5. The anti-clogging device for a micro-volume sampling needle according to claim 4, characterized in that: The mounting groove (28) is connected to the connector (11) in a corresponding manner. The connector (2) has a connecting groove (21) on one end near the syringe (1). The connecting groove (21) is connected to the corresponding block (12) in a corresponding manner.

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