Dental injection needle

Abstract

The utility model discloses a dental injection needle which comprises a needle seat, a needle tube and a protective sleeve, and the needle tube penetrates through the needle seat. The needle tube comprises a puncture end and a butt joint end, and the needle seat comprises a fixing part and a mounting part; the injection needle is characterized in that the injection needle further comprises a sealing piece; the protective sleeve is a cavity with an opening in one end and comprises an opening end and a containing cavity, and the containing cavity can completely contain the needle base and the needle tube; and the sealing piece is connected with the opening end. According to the technical scheme, the puncture end and the butt joint end of the needle tube can be covered through one protective sleeve, the manufacturing cost is reduced, the operation frequency is also reduced, and then the puncture probability of an operator is reduced; meanwhile, after injection is completed, the protective sleeve only needs to be sleeved once, the effect of protecting an operator is achieved, and the use process of the injection needle is simplified.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a dental injection needle. Background Technology

[0002] Dental injection needles are commonly used medical devices in dental treatments. They are primarily used to inject anesthetic drugs into specific areas of the patient's mouth for local anesthesia.

[0003] Patent CN103721324A discloses a disposable sterile dental injection needle, including a needle hub, an injection needle inserted into the needle hub, and a main protective sleeve at the head of the needle hub and a tail end protective sleeve. Patent CN219661960U discloses a universal threaded dental injection needle and dental syringe, wherein the injection needle includes a needle hub 1, a needle tube 4 passing through the needle hub 1, and a head sheath 5 and a tail sheath 6 located at both ends of the needle hub; wherein the head sheath 5 is used to cover the upper end of the needle tube 4 from above, and the tail sheath 6 is used to cover the lower end of the needle tube 4 from below, such as... Figure 1 As shown. In the above-mentioned prior art, when using it, the operator will first remove the tail sheath 6, then align the lower outer end of the needle tube 4 with the small hole on the cartridge syringe, fix the needle seat 1 on the syringe, and finally remove the head sheath 5 and inject. After the injection is completed, the head sheath 5 is put on the upper outside of the needle tube 4, and then the dental injection needle is removed.

[0004] However, when using the injection needle described in the aforementioned patent, the needle tip is always exposed during the installation and removal of the protective sheath, posing a risk of pricking medical personnel. This is particularly problematic during clinical procedures, where the upper part of the needle tube 4 is directly exposed, making it easy to prick the operator when installing and removing the needle. Similarly, when removing the needle, the lower part of the needle tube 4 is also exposed, making it easy for the operator to be pricked when reapplying the protective sheath. The repeated actions of removing and reapplying the sheath further increase the risk of injury. Furthermore, the operator must align the upper part of the needle tube 4 with the small hole in the syringe thread, which not only significantly reduces installation efficiency but also risks bending the upper part of the needle tube 4 due to misalignment. Utility Model Content

[0005] To prevent operators from being punctured during use, this utility model provides the following technical solution:

[0006] A dental injection needle includes a needle hub, a needle tube, and a protective sleeve, wherein the needle tube passes through the needle hub; the needle tube includes a puncture end and a docking end, and the needle hub includes a fixing part and a mounting part; the injection needle also includes a sealing element; the protective sleeve is a cavity with one open end, including an open end and a receiving cavity, the receiving cavity being able to completely contain the needle hub and the needle tube; the sealing element is connected to the open end.

[0007] Preferably, the height of the mounting portion is greater than or equal to the length of the mating end.

[0008] Preferably, the receiving cavity is provided with a limiting part, and the needle seat is provided with a mating part corresponding to the limiting part.

[0009] Preferably, the receiving cavity includes a first cavity and a second cavity, the limiting part is disposed on the inner wall of the first cavity, and the mating part is disposed on the mounting part.

[0010] Preferably, the inner diameter of the first cavity is the same as the outer diameter of the syringe used in conjunction with it; and the length of the first cavity is not less than the length of the docking end.

[0011] Preferably, the injection needle further includes an anti-rotation part, which includes a self-locking part and an adaptation part that cooperates with it; the self-locking part is arranged vertically around the outer periphery of the needle hub; the adaptation part is arranged vertically around the inner wall of the protective sleeve.

[0012] Preferably, the limiting part includes a first limiting part, and the mating part includes a first mating part; the first limiting part protrudes from the inner wall of the first cavity and has a hollow structure, and the first mating part protrudes from the mounting part; the inner diameter of the first limiting part is smaller than the outer diameter of the first mating part, and larger than the outer diameters of the mounting part and the fixing part.

[0013] Preferably, the limiting part further includes a second limiting part, and the mating part includes a second mating part; the second limiting part protrudes from the inner wall of the first cavity and has a hollow structure, and the second mating part is located on the outer periphery of the fixing part.

[0014] Preferably, the inner diameter of the first cavity is larger than the inner diameter of the second cavity, and the second limiting part is formed by the upper end surface of the second cavity.

[0015] Preferably, the protective sleeve is further provided with an inner sleeve, which is fitted onto the puncture end.

[0016] Preferably, the receiving cavity is provided with a limiting part, the limiting part including a second limiting part, and the mating part including a second mating part; the inner sleeve is provided with an outer part and an inner part; the outer part mates with the second limiting part, and the inner part mates with the second mating part.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) This application can cover the puncture end and the docking end of the needle with a protective sleeve, which not only reduces the manufacturing cost but also reduces the number of operations, thereby reducing the probability of puncture injury to the operator; at the same time, after the injection is completed, only one protective sleeve needs to be put on to achieve the protection effect for the operator and simplify the injection needle usage process.

[0019] (2) The protective sleeve design of this application avoids the exposed end of the needle tube after use, greatly reducing the risk of puncture to the operator;

[0020] (3) This application protects the needle tube by designing a limiting part on the needle hub and the protective sleeve so that the puncture end of the needle tube can be suspended inside the protective sleeve.

[0021] (4) This application designs an anti-rotation part in the needle hub and protective sleeve to ensure that the syringe and injection needle will not rotate during installation. With the assistance of the limiting part and the anti-rotation part, the operator can complete the assembly of the syringe and injection needle more quickly.

[0022] (5) Designing the seal as a sealing sticker not only saves costs but also makes it convenient for operators to use;

[0023] (6) By making the inner diameter of the part of the protective sleeve that accommodates the syringe and the inner diameter of the opening end consistent with the outer diameter of the syringe, the operator only needs to align the opening end of the protective sleeve with the syringe when using the injection needle of this application, so that the puncture end of the needle can automatically enter the small hole at the thread of the syringe. This not only eliminates the step of manual aiming, but also reduces the risk of needle bending.

[0024] (7) This application provides an inner sleeve inside the protective sleeve to form double protection for the puncture end, further reducing the risk of needle damage. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of an existing dental injection needle;

[0026] Figure 2a This is an overall appearance drawing of the first dental injection needle of this utility model;

[0027] Figure 2b This is a schematic diagram of the overall structure of the first dental injection needle of this utility model;

[0028] Figure 3 For the above Figure 2b Enlarged view of the needle seat structure;

[0029] Figure 4 For the above Figure 2b Cross-sectional view of the injection needle;

[0030] Figure 5 For the above Figure 4 Enlarged view of a portion of point A in the middle;

[0031] Figure 6a This is an overall appearance drawing of the second type of dental injection needle of this utility model;

[0032] Figure 6b This is a schematic diagram of the overall structure of the second type of dental injection needle in this utility model;

[0033] Figure 7 For the above Figure 6b Cross-sectional view of the injection needle in the image;

[0034] Figure 8 This is a schematic diagram of the structure of this utility model including the inner sleeve;

[0035] Figure 9 For the above Figure 8 Cross-sectional view. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0037] Example 1:

[0038] like Figure 2a , 2b As shown in Figures 4, 6a, 6b, and 7, this embodiment provides a dental injection needle, including a needle hub 100, a needle tube 200, a protective sleeve 300, and a sealing element 400. The needle tube 200 is disposed through the needle hub 100; the protective sleeve 300 covers the needle tube 200 and the needle hub 100 so that the needle tube 200 and the needle hub 100 are completely contained by the protective sleeve 300, that is, the length of the protective sleeve 300 is not less than the length of the needle tube 200; the sealing element 400 is disposed at the open end of the protective sleeve 300 to form a sealed environment inside the protective sleeve 300, thereby preventing the needle hub 100 and the needle tube 200 from being contaminated.

[0039] Specifically, such as Figure 2a , 2b and Figure 3-7As shown, the needle holder 100 includes a fixing part 110 and a mounting part 120; the fixing part 110 is used to limit and fix the needle tube 200; the mounting part 120 is used to mount and fix the syringe. The mounting part 120 has a cavity, and a connecting thread 121 is provided on the inner wall of the cavity to facilitate the connection and separation of the syringe and the injection needle. The connecting thread 121 can be designed according to the needs of the application scenario to match the thread on the syringe to be connected.

[0040] like Figure 4 and 7 As shown, the needle tube 200 includes a puncture end 210 and a docking end 220. The puncture end 210 is used to puncture human tissue to infuse medication, and the docking end 220 is used to puncture a vial contained in a syringe to allow medication to enter the needle tube 200. Further, the height of the mounting portion 120 may be less than the length of the docking end 220, such as... Figure 2b As shown; alternatively, the height of the mounting portion 120 can be greater than or equal to the length of the mating end 220, so that the mating end 220 is completely placed within the cavity of the mounting portion 120, thereby providing double protection for the mating end 220, such as... Figure 6b and 7 As shown.

[0041] like Figure 2b , 4 As shown in Figures 6b and 7, the protective sleeve 300 is a cavity with one open end, comprising a receiving cavity 310 and an open end 320. The receiving cavity 310 is used to receive the needle hub 100 and the needle tube 200, and the open end 320 is connected to the sealing member 400. A limiting part 311 is provided in the receiving cavity 310, and a corresponding mating part 130 corresponding to the limiting part 311 is provided at a corresponding position on the needle hub 100. The mating part 130 may be provided in the mounting part 120 of the needle hub 100 or in the fixing part 110 of the needle hub 100. Preferably, the receiving cavity 310 includes a first cavity 312 and a second cavity 313; the first cavity 312 is used to receive the needle hub 100 and the docking end 220, and the second cavity 313 is used to receive the puncture end 210 and part of the fixing part 110.

[0042] Meanwhile, to ensure that the protective sleeve 300 can fully accommodate the needle 200 without damaging it, the length of the protective sleeve 300 is greater than the length of the needle 200. Furthermore, the length of the first cavity 312 is not less than the length of the docking end 220; the length of the second cavity is greater than the length of the puncture end 210.

[0043] Furthermore, the inner diameter of the upper part of the receiving cavity 310 (the side near the opening end 320) is the same as the outer diameter of the syringe, so that the upper part of the receiving cavity 310 can accommodate the syringe. Preferably, the inner diameter of the opening end 320 and the inner diameter of the first cavity 312 are the same as the outer diameter of the syringe.

[0044] The sealing element 400 is used to close the open end 320 of the protective sleeve 300. It can be in the form of a cap or a sealing sticker. The sealing element 400 is preferably a sealing sticker for ease of use and cost savings.

[0045] When assembling the dental injection needle, first insert the puncture end 210 of the needle tube 200 into the protective sleeve 300 through the opening end 320, then insert the fixing part 110 into the protective sleeve 300, then insert the mounting part 120 into the protective sleeve 300, and limit the needle hub 100 by the mating part 130 and the limiting part 311 of the first cavity 312 to prevent the puncture end 210 from contacting the bottom of the protective sleeve 300; at this time, the needle hub 100 and the needle tube 200 of the injection needle are completely placed in the receiving cavity 310; finally, the sealing member 400 is pasted on the opening end 320, so that the protective sleeve 300 forms a sealed space to complete the assembly of the injection needle.

[0046] In use, the operator simply needs to open the seal 400, hold the syringe in one hand, and align the opening 320 of the protective sleeve 300 with the bottom of the syringe with the other hand, inserting the syringe into the receiving cavity 310 to complete the assembly of the syringe and injection needle. Specifically: after aligning the opening 320 with the bottom of the syringe and allowing the bottom of the syringe to enter the protective sleeve 300, the puncture end 220 of the needle tube 200 automatically enters the small hole at the thread of the syringe. Then, by rotating, the syringe is connected to the connecting thread 121 in the mounting part 120. At this time, the limiting part 311 and the mating part 130 cooperate to provide support for the connection between the syringe and the injection needle, assisting the operator in completing the installation of the syringe and injection needle. After installation, the operator only needs to remove the protective sleeve once to start the injection, avoiding the chance of puncture. After the injection, the operator only needs to put the protective sleeve 300 over the entire injection needle, starting from the puncture end 210, and then remove and discard the syringe.

[0047] Compared to existing technologies, the technical solution of this application reduces the number of protective sleeves and lowers the probability of puncture wounds to the operator by reducing the number of operations. Furthermore, after injection, only one protective sleeve needs to be applied to cover the puncture end 210 and the docking end 220, preventing the docking end 220 from being completely exposed to the environment and significantly reducing the operator's risk of puncture wounds. Moreover, by making the inner diameter of the first cavity 312 consistent with the outer diameter of the syringe, not only is the alignment step eliminated, but bending of the docking end 220 is also avoided. Additionally, compared to existing technologies, the injection needle used in this application is lower in cost and the operation process is simpler.

[0048] Example 2:

[0049] The difference between this embodiment and embodiment 1 is that, in order to prevent the needle hub 100 and the protective sleeve 300 from rotating during the assembly of the syringe and the injection needle, this embodiment also has an anti-rotation part in the dental injection needle.

[0050] like Figure 2b , 3 As shown in Figures 4, 5, 6b, and 7, the anti-rotation part includes a self-locking part 140 and an adapting part 340 that cooperates with the self-locking part 140. The self-locking part 140 is located on the outer periphery of the needle holder 100, and the adapting part 340 is located at a corresponding position on the inner periphery of the protective sleeve 300. Multiple self-locking parts 140 are vertically arranged around the outer periphery of the needle holder 100; multiple adapting parts 340 are vertically arranged at corresponding positions on the inner wall of the protective sleeve 300; the number of self-locking parts 140 is the same as the number of adapting parts 340. In specific design, the self-locking part 140 can be designed as a prismatic protrusion or a groove; the adapting part 340 is correspondingly set as a groove or a prismatic protrusion. Preferably, the self-locking part 140 is located on the outer periphery of the mounting part 120, and the shape of the mounting part 120 is preferably a regular polygon, with one self-locking part 140 provided on each face of the regular polygon to facilitate the assembly of the injection needle. More preferably, the mounting portion 120 is octagonal in shape.

[0051] When assembling the injection needle, after placing the puncture end 210 into the protective sleeve 300, the self-locking part 140 and the adapting part 340 on the needle hub 100 must be aligned before placing the remaining part of the injection needle into the protective sleeve 300. During use, the self-locking part 140 and the adapting part 340 cooperate to provide resistance opposite to the torque of a threaded connection for the connection between the syringe and the injection needle, assisting the operator in easily assembling the syringe and injection needle.

[0052] Example 3:

[0053] The difference between this embodiment and Embodiment 1 or 2 is that the limiting part 311 includes a first limiting part 311a and a second limiting part 311b; the mating part 130 includes a first mating part 130a and a second mating part 130b. The first limiting part 311a corresponds to the first mating part 130a; the second limiting part 311b corresponds to the second mating part 130b.

[0054] like Figure 4 , 5As shown in Figure 7, the first limiting part 311a protrudes from the inner wall of the first cavity 312 and is a cavity structure with a certain thickness; the first mating part 130a is provided on the mounting part 120 and is a protruding ring parallel to the mounting part 120; the inner diameter of the first limiting part 311a is larger than that of the fixing part 110 and the mounting part 120, but smaller than that of the outer diameter of the first mating part 130a, so that the first limiting part 311a and the first mating part 130a can contact each other, thereby forming a support for the needle seat 100. During assembly, the lower surface of the first mating part 130a contacts the upper surface of the first limiting part 311a. Specifically, the first mating part 130a can be provided at the top of the mounting part 120, such as... Figure 4 As shown; it can also be located in the middle of the mounting portion 120, such as Figure 7 As shown.

[0055] like Figure 4 , 7 As shown, the second limiting part 311b is located below the first limiting part 311a, and it is also a cavity structure with a certain thickness; the second mating part 130b is located on the outer periphery of the fixing part 110 to form a second limiting with the second limiting part 311b. The second limiting part 311b can be directly protruding from the inner wall of the first cavity, or it can be designed as other structures. As a specific embodiment, the inner diameter of the first cavity 312 is larger than the inner diameter of the second cavity 313, and the second limiting part 311b is formed from the upper end surface of the second cavity 313, such as... Figure 7 As shown. The second mating part 130b is a protrusion surrounding the outer periphery of the fixing part 110. There are multiple second mating parts 130b, which are arranged parallel to the needle tube 200. The outer diameter of the second mating part 130b is larger than the inner diameter of the second limiting part 311b, so that the second mating part 130b and the second limiting part 311b form a contact surface.

[0056] To ensure the airtightness of the protective sleeve 300, the first cavity 312, the second cavity 313, and the first limiting part 311 are preferably integrally formed.

[0057] Example 4:

[0058] The difference between this embodiment and embodiments 1, 2, or 3 is that, Figure 7 and 8 As shown, the protective sleeve 300 is further provided with an inner sleeve 301, which can be fitted onto the puncture end 210 to protect the needle tip of the puncture end 210. Furthermore, the inner sleeve 301 is disposed within the second cavity 313, and its length is greater than the length of the puncture end 210 but less than the length of the second cavity 313.

[0059] Furthermore, the inner sleeve 301 is provided with an insert portion to fix the inner sleeve 301 relative to the protective sleeve 30 and the fixing portion 110. Specifically, an outer insert portion 302 and an inner insert portion (not shown in the figure) are provided on the inner sleeve 301. The outer insert portion 302 is provided on the outer periphery of the inner sleeve 301 to fix the relative position of the inner sleeve 301 and the needle seat 100; the inner insert portion 303 is provided on the inner wall of the inner sleeve 301 to fix the position of the inner sleeve 301 within the protective sleeve 300 in the vertical direction.

[0060] After the inner sleeve 301 is installed inside the protective sleeve 300, the outer insert 302 cooperates with the second limiting part 311b to limit the inner sleeve. The inner insert and the second mating part 130b cooperate to fix the needle seat 100 and the inner sleeve 301. At this time, the outer diameter of the second mating part 130b needs to be larger than the inner diameter of the inner sleeve so that the second mating part 130b can cooperate with the inner insert; the outer diameter of the outer insert 302 is larger than the inner diameter of the second limiting part 311b so that the second limiting part 311b can contact the outer insert 302. The inner insert is preferably a vertical groove provided on the inner wall of the inner sleeve 301 that can cooperate with the second mating part 130b; the outer insert 302 is preferably provided at the top of the inner sleeve 301, and the outer diameter of the outer insert 302 is larger than the outer diameter of the inner sleeve 301 and smaller than the inner diameter of the first cavity 312.

[0061] By setting an inner sleeve 301 inside the protective sleeve 300, the needle tip of the syringe 200 can be double-protected, which not only ensures safety but also further avoids contamination of the needle tip.

[0062] It should be noted that the technical features in embodiments 1 to 4 above can be combined arbitrarily, and the resulting technical solutions all fall within the protection scope of this application. Furthermore, in this document, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0063] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dental injection needle, comprising a needle hub, a needle tube, and a protective sheath, wherein the needle tube penetrates the needle hub; the needle tube includes a puncture end and a docking end, and the needle hub includes a fixing part and a mounting part; characterized in that, The injection needle also includes a seal; the protective sleeve is a cavity with one open end, including an open end and a receiving cavity, the receiving cavity being able to completely contain the needle hub and the needle tube; the seal is connected to the open end.

2. The injection needle as described in claim 1, characterized in that, The height of the mounting part is greater than or equal to the length of the docking end.

3. The injection needle as described in claim 1 or 2, characterized in that, The cavity is provided with a limiting part, and the needle seat is provided with a mating part corresponding to the limiting part.

4. The injection needle as described in claim 3, characterized in that, The receiving cavity includes a first cavity and a second cavity, the limiting part is disposed on the inner wall of the first cavity, and the mating part is disposed on the mounting part.

5. The injection needle as described in claim 4, characterized in that, The inner diameter of the first cavity is the same as the outer diameter of the syringe used in conjunction with it; and the length of the first cavity is not less than the length of the docking end.

6. The injection needle as described in claim 3, characterized in that, The injection needle also includes an anti-rotation part, which includes a self-locking part and an adaptation part that cooperates with it; the self-locking part is arranged vertically around the outer periphery of the needle hub; the adaptation part is arranged vertically around the inner wall of the protective sleeve.

7. The injection needle as described in claim 4, characterized in that, The limiting part includes a first limiting part, and the mating part includes a first mating part; the first limiting part protrudes from the inner wall of the first cavity and is a hollow structure, and the first mating part protrudes from the mounting part; the inner diameter of the first limiting part is smaller than the outer diameter of the first mating part, and larger than the outer diameters of the mounting part and the fixing part.

8. The injection needle as described in claim 7, characterized in that, The limiting part further includes a second limiting part, and the mating part includes a second mating part; the second limiting part protrudes from the inner wall of the first cavity and is a hollow structure, and the second mating part is located on the outer periphery of the fixing part.

9. The injection needle as described in claim 8, characterized in that, The inner diameter of the first cavity is larger than the inner diameter of the second cavity, and the second limiting part is formed by the upper end surface of the second cavity.

10. The injection needle as described in claim 3, characterized in that, The protective sleeve also includes an inner sleeve, which is fitted over the puncture end.

11. The injection needle as described in claim 10, characterized in that, The cavity is provided with a limiting part, the limiting part including a second limiting part, and the mating part including a second mating part; the inner sleeve is provided with an outer part and an inner part; the outer part mates with the second limiting part, and the inner part mates with the second mating part.

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