Reduced residual straight needle cannula

Abstract

The utility model relates to the field of needle tube in electronic industry, concretely is a kind of straight-through needle tube reducing residual, including needle tube and injection head, the needle tube is connected together with injection head, the needle tube is provided with straight-through passage in injection head, the straight-through passage is through the top of needle tube and the below of injection head, the straight-through passage is set to conical, to avoid liquid solid mixture residual in the needle tube, through the conical structure design of straight-through passage, inside no obstruction structure, liquid solid mixture can be more smooth in flow process, greatly reduce the residual phenomenon caused by complex structure, reduce residual can also avoid needle tube blockage problem, without frequent cleaning or replacement needle tube, thereby improve production efficiency, the liquid solid mixture amount of each delivery is more accurate, reduce the error of point gluing, injection and other operations caused by residual, ensure the stability of product quality.

Description

Technical Field

[0001] This utility model relates to the field of needles in the electronics industry, specifically a straight-through needle that reduces residue. Background Technology

[0002] In the electronics industry, syringes are often used to perform precise dispensing and injection operations on materials such as liquid and solid colloids.

[0003] However, traditional syringes have significant drawbacks. Due to their internal structural design, a large amount of the liquid-solid mixture remains inside the syringe after delivery and use. On one hand, the colloids used in the electronics industry are generally expensive, and this residual colloid cannot be fully utilized, resulting in serious material waste and directly increasing production costs. On the other hand, the residual liquid-solid mixture may solidify and clog the syringe during subsequent use, affecting its normal operation and even leading to product quality issues and reduced production efficiency. Therefore, a new type of syringe is urgently needed to solve these problems. Utility Model Content

[0004] The purpose of this invention is to provide a straight-through needle with reduced residue, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A residual straight-through needle tube includes a needle tube and an injection head, wherein the needle tube and the injection head are connected together, and a straight-through channel is provided inside the needle tube and the injection head. The straight-through channel extends from the top of the syringe to the bottom of the injection head, and the straight-through channel is tapered to prevent liquid-solid mixtures from remaining inside the syringe.

[0006] The straight-through channel has no obstructions, bends, or steps that could cause liquid-solid mixture residue to remain inside, so as to accurately deliver the liquid-solid mixture in the syringe from the outlet end to the required location.

[0007] The tapered structure of the straight-through channel tapers from the inlet end of the needle tube to the outlet end of the injection head, and the angle range of the tapered structure of the straight-through channel is 5°-30°.

[0008] This design allows the liquid-solid mixture to form a concentrated flow trend at the outlet, preventing the mixture from remaining at the outlet edge.

[0009] Furthermore, a sealing cap is fixedly connected to the outlet end of the needle tube, and a connecting pipe is provided above one side of the sealing cap to connect the straight channel to the upper part. A feed pipe for conveying the liquid-solid mixture into the needle tube is installed on the connecting pipe.

[0010] Furthermore, a blocking block is provided inside the straight-through channel, the cross-section of which corresponds to the cross-section of the straight-through channel inside the injection head, and a sealing ring is provided on the side wall of the blocking block to separate the straight-through channel from the lower part.

[0011] The structure of the sealing block and sealing ring controls the opening and closing of the outlet end, preventing the liquid-solid mixture inside from flowing out of the outlet end during the movement of the syringe, thus avoiding contamination of electronic components and waste of the liquid-solid mixture.

[0012] Furthermore, a connecting rod is fixedly connected above the sealing block, the connecting rod vertically passing through the axis of the sealing cover, and the connecting rod sliding in a sealing manner with the sealing cover.

[0013] The sliding structure of the connecting rod controls the rise and fall of the sealing block, enabling the straight-through channel outlet to open and close.

[0014] Furthermore, a plate is fixed to the upper end of the connecting rod, and a movable head is rotatably connected to the plate via a bearing. A spring is provided below the plate, and the two ends of the spring are fixedly connected to the sealing cover and the plate, respectively.

[0015] Furthermore, a limiting frame is fixedly connected to the sealing cover. The limiting frame is sleeved on the outside of the spring. The upper surface of the limiting frame is provided with four evenly distributed positioning grooves. The positioning grooves on the limiting frame are two symmetrically distributed first positioning grooves and two symmetrically distributed second positioning grooves.

[0016] Furthermore, the depth of the first positioning groove within the limiting frame is greater than the depth of the second positioning groove within the limiting frame, and symmetrically distributed positioning rods are fixedly connected below the movable head, with the positioning rods abutting against the two first positioning grooves or the two second positioning grooves.

[0017] By engaging the positioning rod with the first and second positioning grooves, and considering the difference in depth between the first and second positioning grooves, along with the spring structure, the sealing block is positioned in a state where the outlet end of the straight-through channel is completely closed and the outlet end is completely open.

[0018] Compared with the prior art, the beneficial effects of this utility model are: This invention utilizes a conical structure design with a straight-through channel and an unobstructed internal structure, allowing the liquid-solid mixture to flow more smoothly. This significantly reduces residue caused by the complex structure, and the reduced residue also avoids syringe blockage. This eliminates the need for frequent cleaning or syringe replacement, thereby improving production efficiency. The amount of liquid-solid mixture delivered each time is more precise, reducing errors in dispensing, injection, and other operations caused by residue, and ensuring the stability of product quality. The structure of the sealing block and the sealing ring controls the opening and closing of the discharge end of the straight channel. The positioning rod is fixed in the state of sealing or opening the outlet end by the snap-fit ​​structure between the first positioning groove and the second positioning groove, and can be freely adjusted to prevent the liquid-solid mixture from leaking out when the needle moves, contaminating electronic components and wasting the liquid-solid mixture. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention; Figure 3 This is a three-dimensional structural diagram of the present invention; Figure 4 This is a three-dimensional structural diagram of the present invention; Figure 5 This is a three-dimensional structural diagram of the present invention.

[0020] In the diagram: 1. Needle; 11. Injection head; 12. Straight-through channel; 2. Sealing cap; 21. Connecting tube; 3. Sealing block; 31. Sealing ring; 32. Connecting rod; 4. Moving head; 41. Positioning rod; 42. Spring; 5. Limiting frame; 51. First positioning groove; 52. Second positioning groove; 6. Feed tube. Detailed Implementation

[0021] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0022] Example 1: Please see Figures 1 to 5 The present invention provides a technical solution: a straight-through needle tube for reducing residue, comprising a needle tube 1 and an injection head 11, wherein the needle tube 1 and the injection head 11 are connected together, and a straight-through channel 12 is provided inside the needle tube 1 and the injection head 11. The straight-through channel 12 extends through the top of the needle tube 1 and the bottom of the injection head 11. The straight-through channel 12 is tapered to prevent liquid-solid mixtures from remaining in the needle tube 1.

[0023] The straight-through channel 12 has no obstructions, bends, steps, or other structures that could cause liquid-solid mixture residue to remain inside, so as to accurately deliver the liquid-solid mixture in the syringe 1 from the outlet end to the required location.

[0024] The tapered structure of the straight-through channel 12 tapers from the inlet end of the needle tube 1 to the outlet end of the injection head 11, and the angle range of the tapered structure of the straight-through channel 12 is 5°-30°.

[0025] This design allows the liquid-solid mixture to form a concentrated flow trend at the outlet, preventing the mixture from remaining at the outlet edge.

[0026] Example 2: The residual-reducing straight-through needle disclosed in Embodiment 2 of this utility model has a structure that is basically the same as that in Embodiment 1. The difference is that a sealing cap 2 is fixedly connected to the outlet end of the needle 1, and a connecting pipe 21 connecting the straight-through channel 12 to the upper side is provided on one side of the sealing cap 2. A feed pipe 6 for conveying a liquid-solid mixture into the needle 1 is installed on the connecting pipe 21.

[0027] A sealing block 3 is provided inside the straight channel 12. The cross-section of the sealing block 3 corresponds to the cross-section of the straight channel 12 inside the injection head 11. A sealing ring 31 is provided on the side wall of the sealing block 3 to separate the straight channel 12 from the bottom.

[0028] The structure of the sealing block 3 and the sealing ring 31 controls the opening and closing of the outlet end, preventing the liquid-solid mixture inside from flowing out from the outlet end during the movement of the needle tube 1, thus avoiding contamination of electronic components and waste of the liquid-solid mixture.

[0029] Example 3: The residual straight-through needle disclosed in Embodiment 3 of this utility model has a structure that is basically the same as that in Embodiment 2. The difference is that a connecting rod 32 is fixedly connected above the sealing block 3. The connecting rod 32 vertically passes through the axis of the sealing cap 2, and the connecting rod 32 slides in a sealing manner with the sealing cap 2.

[0030] The sliding structure of the connecting rod 32 controls the rise and fall of the sealing block 3, so that the outlet end of the straight channel 12 can be opened and closed.

[0031] The upper end of the connecting rod 32 is fixed with a plate, and the plate is rotatably connected to a movable head 4 via a bearing. A spring 42 is provided below the plate, and the two ends of the spring 42 are fixedly connected to the sealing cover 2 and the plate, respectively.

[0032] The sealing cover 2 is also fixedly connected to a limiting frame 5. The limiting frame 5 is sleeved on the outside of the spring 42. The upper surface of the limiting frame 5 is provided with four evenly distributed positioning grooves. The positioning grooves on the limiting frame 5 are two symmetrically distributed first positioning grooves 51 and two symmetrically distributed second positioning grooves 52.

[0033] The depth of the first positioning groove 51 within the limiting frame 5 is greater than the depth of the second positioning groove 52 within the limiting frame 5. A symmetrically distributed positioning rod 41 is fixedly connected below the movable head 4, and the positioning rod 41 abuts against the two first positioning grooves 51 or the two second positioning grooves 52.

[0034] By engaging the positioning rod 41 with the first positioning groove 51 and the second positioning groove 52, and considering the difference in depth between the first positioning groove 51 and the second positioning groove 52, combined with the structure of the spring 42, the sealing block 3 is positioned in a state where the outlet end of the straight-through channel 12 is completely closed and the outlet end is completely open.

[0035] The specific details of this plan are as follows: Fix the sealing cap 2 onto the needle tube 1, lift the movable head 4 upwards so that the bottom of the positioning rod 41 moves above the limit frame 5, and rotate the movable head 4 on the plate so that the positioning rod 41 rotates above the first positioning groove 51. Release the movable head 4, and under the elastic force of the spring 42, the positioning rod 41 abuts against the first positioning groove 51. At this time, the sealing block 3 and the sealing ring 31 completely block the outlet end of the straight channel 12. Install the feed pipe 6 onto the connecting pipe 21 and inject the liquid-solid mixture into the straight channel 12. Under the elastic force of the spring 42, combined with the gravity and pressure of the liquid-solid mixture, the sealing block 3 is prevented from moving upwards, which would cause the outlet end of the straight channel 12 to open. Move the needle tube 1 so that its outlet end is above the desired dispensing or injection position. Lift and rotate the movable head 4 so that the positioning rod 41 is engaged in the second positioning groove 52. Keep the sealing block 3 in the upper position, that is, the outlet end of the straight channel 12 is open, and the dispensing and injection process is performed on the desired position.

[0036] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A straight-through needle for reducing residue, comprising a needle tube (1) and an injection head (11), characterized in that, The needle tube (1) is connected to the injection head (11), and a straight-through channel (12) is provided inside the needle tube (1) and the injection head (11). The through channel (12) extends from the top of the needle tube (1) to the bottom of the injection head (11). The through channel (12) is tapered to prevent liquid-solid mixtures from remaining in the needle tube (1).

2. The reduced-residue straight-through needle tube according to claim 1, characterized in that, The conical structure of the straight channel (12) narrows from the inlet end of the needle tube (1) to the outlet end of the injection head (11), and the angle range of the conical structure of the straight channel (12) is 5°-30°.

3. The reduced residue straight-through needle tube according to claim 1, characterized in that, The inlet end of the needle tube (1) is fixedly connected to a sealing cap (2). A connecting pipe (21) connecting the straight channel (12) to the top is provided on one side of the sealing cap (2). A feed pipe (6) for conveying a liquid-solid mixture into the needle tube (1) is installed on the connecting pipe (21).

4. The reduced-residue straight-through needle tube according to claim 3, characterized in that, A sealing block (3) is provided inside the straight channel (12). The cross-section of the sealing block (3) corresponds to the cross-section of the straight channel (12) inside the injection head (11). A sealing ring (31) is provided on the side wall of the sealing block (3) to separate the straight channel (12) from the bottom.

5. The reduced-residue straight-through needle tube according to claim 4, characterized in that, A connecting rod (32) is fixedly connected above the sealing block (3). The connecting rod (32) passes vertically through the axis of the sealing cover (2). The connecting rod (32) slides in a sealing manner with the sealing cover (2).

6. The reduced-residue straight-through needle tube according to claim 5, characterized in that, The upper end of the connecting rod (32) is fixed with a plate, and the plate is rotatably connected to a movable head (4) via a bearing. A spring (42) is provided below the plate, and the two ends of the spring (42) are fixedly connected to the sealing cover (2) and the plate, respectively.

7. The reduced-residue straight-through needle tube according to claim 6, characterized in that, The sealing cover (2) is also fixedly connected to a limiting frame (5). The limiting frame (5) is sleeved on the outside of the spring (42). The upper surface of the limiting frame (5) is provided with four evenly distributed positioning grooves. The positioning grooves on the limiting frame (5) are two symmetrically distributed first positioning grooves (51) and two symmetrically distributed second positioning grooves (52).

8. The reduced-residue straight-through needle tube according to claim 7, characterized in that: The depth of the first positioning groove (51) in the limiting frame (5) is greater than the depth of the second positioning groove (52) in the limiting frame (5). A symmetrically distributed positioning rod (41) is fixedly connected below the movable head (4). The positioning rod (41) abuts against the two first positioning grooves (51) or the two second positioning grooves (52).

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