Flat-head needle tube

Abstract

The utility model discloses a flat-head needle tube, and relates to the technical field of needle tubes. The injector comprises a syringe, a needle seat is arranged at one end of the syringe, an injection head connected with the syringe is arranged in the needle seat, and the injection head comprises a first needle arranged at one end of the syringe and a second needle in sliding fit with the peripheral side of the first needle; a filter cover is arranged at one end of the second needle head, a protective cover is arranged at one end of the syringe, the first needle head and the second needle head are located in the protective cover, a clamping assembly is arranged between the protective cover and the syringe, and two movable rods corresponding to the filter cover are arranged at one end of the protective cover in a sliding fit mode. By means of the arranged movable rods, the two movable rods can be pressed to move, so that the two movable rods extrude and fix the filter cover, the filter cover can be taken down while the protective cover is taken down, and the situation that the hands of medical staff make contact with a needle head is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of needle technology, specifically, it relates to a flat-headed needle. Background Technology

[0002] Syringe syringes have become one of the most widely used instruments in the medical field, mainly used to draw or inject gas or liquid with a needle.

[0003] Chinese patent application CN202323160206.4 discloses a healthcare-friendly syringe with a safety needle, comprising: a syringe barrel; and a needle assembly including a first needle and a second needle. The first needle has a needle seat with a tensioning part, and the needle seat is detachably connected to the syringe barrel. One end of the first needle has a rounded flat tip, and the second needle is located inside the first needle, which is connected to the syringe barrel. Although this device can solve the problem of accidental needle tip injury to medical personnel in existing syringes through the flat tip of the first needle and the filter cap, in actual use, medical personnel's hands will come into contact with the needle during the process of adjusting the needle and removing the filter cap. Even with sterilization, there is still a certain risk. Furthermore, the filter cap only protects one end of the needle and lacks protection for the entire needle.

[0004] In view of this, this utility model is proposed. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a flat-headed needle tube.

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0007] A flat-headed syringe includes an injection barrel, one end of which is provided with a needle holder, and an injection head connected to the injection barrel is provided inside the needle holder. The injection head includes a first needle installed at one end of the injection barrel and a second needle that slides around the first needle.

[0008] The second needle has a filter cap at one end and a protective cover at one end of the syringe. The first and second needles are located inside the protective cover. A snap-fit ​​assembly is installed between the protective cover and the syringe. Two movable rods corresponding to the filter cap are slidably fitted at one end of the protective cover.

[0009] Optionally, the filter cover has insertion holes on both opposite outer sides, and two movable rods correspond to the two insertion holes respectively. A limiting piece is installed at one end of the movable rod that passes through the protective cover.

[0010] Optionally, the filter cover is cylindrical, with its inner diameter corresponding to the outer diameter of the second needle. The filter cover contains a filter screen, which corresponds to one end of the second needle.

[0011] Optionally, the snap-fit ​​assembly includes two snap rods installed at one end of the syringe and two snap slots opened at one end of the protective cover, with the two snap rods engaging with the two snap slots respectively.

[0012] Optionally, a sealing ring is installed at one end of the first needle, and the periphery of the sealing ring corresponds to the inner wall of the second needle.

[0013] Optionally, the needle holder is provided with a telescopic tube, one end of which is fixedly connected to one end of the second needle.

[0014] Optionally, support blocks are installed on both opposite outer sides of the syringe, and a retaining ring is installed on one side of each support block.

[0015] Optionally, the syringe is equipped with a liquid level scale.

[0016] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the following advantages at the same time:

[0017] The movable levers can be pressed to move the filter cover, allowing it to be removed simultaneously with the protective cover. This reduces the chance of medical staff coming into contact with the needle. The protective cover also protects the injection head before use, minimizing the impact of the external environment on the injection head.

[0018] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0020] Figure 1 This is a schematic diagram of the needle tube structure;

[0021] Figure 2 This is a schematic diagram of the protective cover structure;

[0022] Figure 3 This is a schematic diagram of the syringe structure;

[0023] Figure 4 This is a schematic diagram of the injection head structure;

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Injector cylinder, 2. Needle holder, 3. Injection head, 4. Support block, 5. First needle, 6. Second needle, 7. Filter cover, 8. Protective cover, 9. Snap-fit ​​assembly, 901. Snap-fit ​​rod, 902. Movable rod, 10. Insertion hole, 11. Limiting piece, 12. Fixing ring, 13. Sealing ring, 14. Telescopic tube, 15. Filter screen, 16. Liquid level scale.

[0026] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings.

[0028] Please see Figure 1-4 As shown, this embodiment provides a flat-headed syringe, including an injection barrel 1. One end of the injection barrel 1 is provided with a needle holder 2. The needle holder 2 is provided with an injection head 3 connected to the injection barrel 1. The injection head 3 includes a first needle 5 installed at one end of the injection barrel 1 and a second needle 6 that slides around the first needle 5.

[0029] The second needle 6 has a filter cap 7 at one end and a protective cover 8 at one end of the syringe 1. The first needle 5 and the second needle 6 are located inside the protective cover 8. A snap-fit ​​assembly 9 is installed between the protective cover 8 and the syringe 1. Two movable rods 10 corresponding to the filter cap 7 are slidably fitted at one end of the protective cover 8.

[0030] One application of this embodiment is as follows: When using the syringe, medical personnel take it out for injection. First, remove the protective cover 8 at one end of the syringe 1 to separate the snap-fit ​​assembly 9, exposing the second needle 6 at one end of the syringe 1. Then, the medicine can be drawn into the syringe 1 through the second needle 6. The filter cover 7 will filter the medicine to prevent glass fragments and medicine from entering the syringe 1 together. After the medicine is drawn out, the protective cover 8 can be snapped back onto one end of the syringe 1 to protect the second needle 6. When injection is needed, the two movable rods 10 can be pressed to compress and fix the filter cover 7. Then, the protective cover 8 can be removed together with the filter cover 7.

[0031] The movable rods 10 can be pressed to move the two movable rods 10, so that the two movable rods 10 can press and fix the filter cover 7. Thus, the filter cover 7 can be removed at the same time as the protective cover 8, reducing the situation where medical staff's hands come into contact with the needle. The protective cover 8 will protect the injection head 3 before using the syringe 1, reducing the impact of the external environment on the injection head 3.

[0032] like Figure 2As shown, in this embodiment, the filter cover 7 has insertion holes 11 on both opposite outer sides. Two movable rods 10 correspond to the two insertion holes 11 respectively, and a limiting piece 12 is installed at one end of the movable rod 10 that passes through the protective cover 8. When the two movable rods 10 are pressed through the insertion holes 11, they can enter the two insertion holes 11 respectively, so that the movable rods 10 are connected and fixed to the filter cover 7. When the protective cover 8 moves, the protective cover 8 can move the filter cover 7 through the movable rods 10, so that the filter cover 7 can be removed from one end of the second needle 6.

[0033] like Figure 2-3 As shown, the filter cap 7 in this embodiment is cylindrical, and its inner diameter corresponds to the outer diameter of the second needle 6. A filter screen 16 is installed inside the filter cap 7, and the filter screen 16 corresponds to one end of the second needle 6. By using the filter screen 16, after the filter cap 7 is fitted onto the second needle 6, the filter screen 16 covers one end of the second needle 6, allowing it to filter the extracted medication.

[0034] like Figure 1-2 As shown, the snap-fit ​​assembly 9 in this embodiment includes two snap-fit ​​rods 901 mounted on one end of the syringe 1 and two snap-fit ​​slots 902 formed on one end of the protective cover 8. The two snap-fit ​​rods 901 engage with the two snap-fit ​​slots 902 respectively. By using the snap-fit ​​rods 901, the protective cover 8 is aligned with one end of the syringe 1, so that the two snap-fit ​​rods 901 correspond to the two snap-fit ​​slots 902 respectively. Then, by rotating the protective cover 8, the snap-fit ​​rods 901 engage with the snap-fit ​​slots 902, thus installing and fixing the protective cover 8. Conversely, the protective cover 8 can be removed.

[0035] like Figure 4 As shown, in this embodiment, a sealing ring 14 is installed at one end of the first needle 5, and the periphery of the sealing ring 14 corresponds to the inner wall of the second needle 6. The sealing ring 14 seals the connection between the first needle 5 and the second needle 6.

[0036] like Figure 3-4 As shown, the needle holder 2 in this embodiment is provided with a telescopic tube 15, one end of which is fixedly connected to one end of the second needle 6. The telescopic tube 15 can be pushed to extend or retract, thereby driving the second needle 6 and adjusting the length of the extended portion of the second needle 6, thus enabling better extraction of the medication from the ampoule.

[0037] like Figure 3 As shown, in this embodiment, support blocks 4 are installed on both opposite outer sides of the syringe 1, and a fixing ring 13 is installed on one side of each of the two support blocks 4. The support blocks 4 can support the syringe 1 and prevent it from rolling and falling when placed. The fixing ring 13 makes it convenient for medical staff to handle and use.

[0038] like Figure 3 As shown, the syringe 1 in this embodiment is provided with a liquid level scale 17. The liquid level scale 17 allows the measurement of the drug solution in the syringe 1 to be viewed.

[0039] This utility model is not limited to the above-described embodiments. Anyone should know that structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model. Technical aspects, shapes, and structures not described in detail in this utility model are all publicly known technologies.

Claims

1. A trocar tube characterized by, include: The syringe (1) has a needle holder (2) at one end and an injection head (3) connected to the syringe (1) inside the needle holder (2). The injection head (3) includes a first needle (5) installed at one end of the syringe (1) and a second needle (6) that slides around the first needle (5). The second needle (6) has a filter cap (7) at one end and a protective cover (8) at one end of the syringe (1). The first needle (5) and the second needle (6) are located inside the protective cover (8). A snap-fit ​​assembly (9) is installed between the protective cover (8) and the syringe (1). Two movable rods (10) corresponding to the filter cap (7) are slidably fitted at one end of the protective cover (8).

2. A trocar according to claim 1, wherein The filter cover (7) has two insertion holes (11) on its opposite outer sides. Two movable rods (10) correspond to the two insertion holes (11) respectively. A limiting piece (12) is installed at one end of the movable rod (10) that passes through the protective cover (8).

3. A trocar according to claim 1, wherein The filter cover (7) is cylindrical, and the inner diameter of the filter cover (7) corresponds to the outer diameter of the second needle (6). The filter cover (7) is equipped with a filter screen (16), which corresponds to one end of the second needle (6).

4. A trocar according to claim 1, wherein The snap-fit ​​assembly (9) includes two snap rods (901) installed at one end of the syringe (1) and two snap slots (902) opened at one end of the protective cover (8). The two snap rods (901) are snapped into the two snap slots (902) respectively.

5. A trocar according to claim 1, wherein One end of the first needle (5) is equipped with a sealing ring (14), and the periphery of the sealing ring (14) corresponds to the inner wall of the second needle (6).

6. A trocar according to claim 1, wherein The needle holder (2) is provided with a telescopic tube (15), one end of which is fixedly connected to one end of the second needle (6).

7. A trocar according to claim 1, wherein Support blocks (4) are installed on both opposite outer sides of the syringe (1), and a fixing ring (13) is installed on one side of each of the two support blocks (4).

8. A trocar according to claim 1, wherein The syringe (1) is equipped with a liquid level scale (17).

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