Disposable blunt aesthetic needle tip with retractable guide tip

Abstract

This invention discloses a disposable blunt aesthetic needle tip with a retractable guide tip, comprising a sharp needle tip for puncture guidance, a blunt needle tube for injection, an elastic telescopic component that elastically connects the sharp needle tip and the blunt needle tube, and a detachable fixing plug inserted into the blunt needle tube. The elastic telescopic component includes a telescopic spring and an elastic band connected to each other. In the initial injection state, the sharp needle tip is exposed outside the blunt needle tube, and both the telescopic spring and the elastic band are in a stretched state. The elastic band is located below the fixing plug, and the fixing plug presses the elastic band tightly against the inner wall of the blunt needle tube, ensuring that the elastic telescopic component is in a stable stretched state. The fixing plug and the blunt needle tube are tightly fitted. This invention utilizes the sharp needle tip for puncture guidance, and then releases the elastic potential energy of the elastic telescopic component through the fixing plug, causing it to pull the sharp needle tip back into the blunt needle tube, leaving only the blunt needle tube in the skin tissue to achieve a single injection of the medication.

Description

Technical Field

[0001] This utility model relates to the field of medical aesthetics technology, specifically to a disposable blunt aesthetic needle tip with a retractable guide needle tip. Background Technology

[0002] In the field of medical aesthetics, cosmetic injections are a common cosmetic procedure. To avoid cross-infection, cosmetic needles are usually replaced after each injection. Blunt needles are one of the commonly used injection tools. Blunt needles usually have a larger diameter, so they can better avoid blood vessels and nerves, causing less tissue trauma, reducing bruising, and making them safer. However, this also makes them difficult to penetrate the skin. Usually, they need to be used in conjunction with sharp needles for pilot puncture. That is, the sharp needle is used to puncture the skin to leave an incision for the blunt needle to be inserted, and then the sharp needle is withdrawn and the blunt needle is inserted. This operation is relatively cumbersome, and the repeated withdrawal and insertion of the needle can easily cause discomfort to the patient. In existing patents, there are very few technical solutions that make the above improvements to the needle.

[0003] For example, patent CN222426858U discloses a cosmetic needle tip assembly, including a housing, a transmitter and a limiting rod fixedly connected to the inner wall of the housing, an inlet fixedly installed on the top of the housing, a rotating sleeve rotatably connected to the inner wall of the housing, a lifting sleeve threadedly connected to the inner wall of the rotating sleeve, and a fixed needle plate slidably connected to the inner wall of the lifting sleeve. By rotating the rotating sleeve, the internal thread of the rotating sleeve drives the thread at the top of the lifting sleeve to move upward, causing the lifting sleeve to move inward along the direction of the limiting rod into the rotating sleeve. The height of the lifting sleeve continuously increases the height of the protruding section of the steel needle assembly, thereby controlling the length of the steel needle assembly. The above solution allows for adjustable needle length, making it easier for doctors to accurately insert needles and reducing the error rate. Although it improves the needle tip, it does not solve the aforementioned problems. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies and provide a disposable blunt aesthetic needle tip with a retractable guide needle tip. This combines the puncture guidance function of a sharp needle with that of a blunt needle, avoiding the need to remove the sharp needle before inserting the blunt needle to penetrate the skin.

[0005] To solve the above problems, the present invention adopts the following solution: A disposable blunt aesthetic needle tip with a retractable guide tip includes a sharp needle tip for puncture guidance, a blunt needle tube for injection, an elastic telescopic component, and a fixing insert. The blunt needle tube has a head that penetrates the skin and communicates with the outside, and has multiple side holes. The length of the sharp needle tip is shorter than the length of the blunt needle tube, and it is movably installed inside the blunt needle tube through the elastic telescopic component. The elastic telescopic component includes a telescopic spring and an elastic band connected to each other. One end of the elastic telescopic component is connected to the inner wall of the blunt needle tube through a flow connection plate, and the other end is connected to the sharp needle tip through a flow mesh plate. The needle tip is connected to the inner wall of the blunt needle tube, and a central through hole is provided in the middle to allow the drug solution to flow through. The flow mesh plate is arranged in a grid shape with several through holes and is located at the end of the sharp needle tip away from the head. In the initial state of injection, the head of the sharp needle tip is exposed outside the blunt needle tube. The telescopic spring and the elastic band are both in a stretched state, and the elastic band is located below one of the side holes. A fixing plug can be detachably inserted into the side hole, which presses the elastic band tightly against the inner wall of the blunt needle tube. The fixing plug and the side hole are tightly fitted.

[0006] In the above scheme, when the aesthetic needle tip is removed, it is in its initial state. When injection is required, the sharp needle tip first pierces the skin and penetrates, while the blunt needle tube is inserted into the skin later along with the sharp needle tip. At this time, the sharp needle tip is pulled back into the blunt needle tube by the elastic telescopic component. Specifically, the fixing plug is pulled out, causing it to detach from the elastic band. Therefore, the telescopic spring and elastic band contract under their rebound force, pulling the sharp needle tip back into the blunt needle tube, leaving only the blunt needle tube in the skin tissue to achieve drug injection. The drug in the blunt needle tube passes through the central through hole, with part flowing into the gap between the sharp needle tip and the blunt needle tube, and part flowing into the sharp needle tip through the flow mesh plate. Then, they flow out into the skin tissue through the side hole or the blunt needle tube head, achieving a one-time injection of the drug.

[0007] Preferably, a puncture and injection stabilization assembly is provided between the blunt needle tube and the sharp needle tip. The puncture and injection stabilization assembly includes two elastic balls symmetrically disposed on the outer wall of the sharp needle tip and having elasticity, and two puncture arc blocks symmetrically disposed on the inner wall of the blunt needle tube. When in the initial state for puncture preparation, the elastic balls abut against the end of the puncture arc blocks near the head.

[0008] When using a sharp needle tip to puncture the skin, the skin can create some resistance to the sharp needle tip, causing it to tend to move into the blunt needle tube, which affects the puncture operation. Therefore, a puncture and injection stabilization component is designed so that during puncture, the puncture arc block can use an elastic ball to resist the inward movement of the sharp needle tip, ensuring smooth puncture and convenient operation.

[0009] Preferably, the puncture and injection stabilization assembly further includes two injection arc blocks symmetrically disposed on the inner wall of the blunt needle tube. The injection arc blocks cooperate with the elastic ball block. When the sharp needle tip retracts back into the blunt needle tube under the action of the elastic telescopic assembly, the elastic ball block abuts against the end of the injection arc block away from the head.

[0010] When the sharp needle tip retracts into the blunt needle tube and the medication is injected, the pressure of the medication injection will cause the sharp needle tip to move outward, affecting the stability and safety of the medication injection. Therefore, an injection arc block that cooperates with the elastic ball block is set so that during injection, the injection arc block can resist the outward movement of the sharp needle tip to a certain extent, ensuring injection stability.

[0011] Preferably, the blunt needle tip is chamfered and smoothed with a rounded edge.

[0012] The above-mentioned design facilitates the insertion of the blunt needle into the skin by beveling it, while the sharp needle tip follows the blunt needle tip. The rounded and smooth design not only makes insertion easier but also improves comfort.

[0013] Preferably, when the sharp needle tip retracts into the blunt needle tube, the head of the sharp needle tip is located between two adjacent side holes, wherein the first side hole near the head of the blunt needle tube is offset from the sharp needle tip, and the medicine can flow out smoothly from the first side hole.

[0014] The above settings are designed to ensure that the side holes are exposed as much as possible so that they can function properly.

[0015] Preferably, the plane of symmetry of the sharp needle tip forms an angle greater than zero with the common plane of symmetry of all the side holes.

[0016] The above configuration ensures that the fixing insert inserted into the side hole does not obstruct observation during sharp needle puncture.

[0017] Preferably, the fixing plug is T-shaped and includes a telescopic control rod inserted into a side hole and a pull bar vertically disposed at the upper end of the telescopic control rod.

[0018] The above settings facilitate the removal of the fixed plug and release of the elastic potential energy stored in the elastic telescopic component.

[0019] Preferably, the inner wall of the blunt needle tube is recessed with an elastic groove, which is located below the telescopic control rod. When the fixing plug is inserted into the side hole, the telescopic control rod is tightly fitted into the elastic groove, and the rod wall of the telescopic control rod is also tightly fitted with the side hole wall.

[0020] The above settings are designed to further compress the elastic band with the fixed insertion rod, ensuring stable puncture by the sharp needle tip.

[0021] The beneficial effects of this utility model are as follows: This invention slightly improves upon a blunt needle tube by connecting its head to the outside. A sharp needle tip is then combined with the blunt needle tube. The sharp needle tip punctures the skin for guidance, while the blunt needle tube follows, penetrating the skin. An elastic telescopic component pulls the sharp needle tip back into the blunt needle tube, leaving the blunt needle tube within the skin tissue for a single injection of the medication. This eliminates the need for a sharp needle to puncture the skin first, then withdraw the sharp needle and insert the blunt needle, simplifying the injection process and improving patient comfort. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention in its initial state; Figure 2 This is a partial internal schematic diagram of the initial state of this utility model; Figure 3 This is a partial structural diagram of the sharp needle tip retracting into the blunt needle tube of this utility model. Figure 4 for Figure 2 A magnified view of a section at point I; Figure 5 for Figure 3 Enlarged view of a section at point II; Figure 6 for Figure 3 Enlarged view of a section at point III; Figure 7 for Figure 3 A magnified view of a section at point IV; Figure 8 for Figure 3 A magnified view of section V.

[0023] Reference numerals: 10 sharp needle tip, 20 blunt needle tube, 30 elastic telescopic component, 40 fixed installation plug, 50 head, 70 puncture and injection stabilization component, 80 elastic slot, 11 side hole, 31 telescopic spring, 32 elastic band, 41 telescopic control rod, 42 pull crossbar, 61 flow connection plate, 611 central through hole, 62 flow mesh plate, 71 elastic ball block, 72 puncture arc block, 73 injection arc block. Detailed Implementation

[0024] Example 1: Reference Figures 1-8This embodiment provides a disposable blunt aesthetic needle tip with a retractable guide needle tip, which combines the puncture guidance function of a sharp needle with the high safety advantage of a blunt needle. It avoids the need to withdraw the sharp needle before inserting the blunt needle and then piercing the skin, simplifying the operation steps and improving the patient's treatment comfort. The aesthetic needle tip includes a sharp needle tip 10 for puncture guidance, a blunt needle tube 20 for injection, an elastic telescopic component 30 that elastically connects the sharp needle tip 10 and the blunt needle tube 20, and a fixing plug 40 for fixing the elastic telescopic component 30 to a stable stretched state. The head 50 of the blunt needle tube 20, which penetrates the skin, communicates with the outside and also has multiple side holes 11 that communicate with the outside. The length and diameter of the sharp needle tip 10 are smaller than those of the blunt needle tube 20. To ensure the puncture stability of the sharp needle tip 10, the sharp needle tip 10 needs to have a certain length, which is about one-third the length of the blunt needle tube 20. The sharp needle tip 10 is movably installed inside the blunt needle tube 20 through the elastic telescopic component 30, and there is a narrow gap between the outer wall of the sharp needle tip 10 and the inner wall of the blunt needle tube 20. The elastic telescopic component 30 includes a telescopic spring 31 and an elastic band 32. One end of the telescopic spring 31 is connected to the inner wall of the blunt needle tube 20 through a flow connecting plate 61, and the other end is connected to the sharp needle tip 10 through a flow mesh plate 62. The flow connecting plate 61 is connected to the inner wall of the blunt needle tube 20 and has a central through hole 611 in its middle to allow the liquid medicine to flow through. The flow mesh plate 62 is arranged in a grid shape with several through holes to allow the liquid medicine to flow through the sharp needle tip 10 to the head 50 of the blunt needle tube 20. The flow mesh plate 62 is located at the end of the sharp needle tip 10 away from the head 50. The telescopic spring 31 is connected to the elastic band 32. In order to ensure the stability of the connection between the elastic telescopic component 30 and the sharp needle tip 10, provide a certain support, and reduce the degree of random shaking of the sharp needle tip 10, the telescopic spring 31 is divided into two sections, and the elastic band 32 is connected between the two sections. In the initial state of injection, the head 50 of the sharp needle tip 10 is exposed outside the blunt needle tube 20. Both the telescopic spring 31 and the elastic band 32 are in a stretched state, and the elastic band 32 is located below one of the side holes 11. A fixing plug 40 can be detachably inserted into the side hole 11. The fixing plug tightly presses the elastic band 32 against the inner wall of the blunt needle tube 20. The fixing plug 40 and the side hole 11 are tightly fitted to ensure that the elastic telescopic component 30 is in a stable stretched state. Therefore, after the sharp needle tip 10 completes the puncture and guides the blunt needle tube 20 into the skin tissue, the fixing plug 40 can be pulled out to release the elastic potential energy accumulated by the stretching of the elastic telescopic component 30, pulling the sharp needle tip 10 to be completely retracted into the blunt needle tube 20, leaving only the blunt needle tube 20 in the skin tissue to achieve a one-time injection of the drug solution.

[0025] refer to Figure 4 , Figure 7To ensure stable puncture and drug injection of the sharp needle tip 10, a puncture and injection stabilization component 70 is specially designed to improve puncture and injection stability. The specific structure is as follows: A puncture and injection stabilization assembly 70 is provided between the blunt needle tube 20 and the sharp needle tip 10. The puncture and injection stabilization assembly 70 includes two elastic balls 71 symmetrically arranged on the outer wall of the sharp needle tip 10 and having elasticity, and two puncture arc blocks 72 symmetrically arranged on the inner wall of the blunt needle tube 20. When in the initial state for puncture, the elastic balls 71 abut against the end of the puncture arc blocks 72 near the head 50, so that during puncture, the direction of the force exerted by the skin on the sharp needle tip 10 is opposite to the direction of the blocking force of the puncture arc blocks 72 on the elastic balls 71. Therefore, the puncture and injection stabilization assembly 70 is provided so that during puncture, the puncture arc blocks 72 can resist the inward movement of the sharp needle tip 10 through the elastic balls 71, ensuring smooth puncture. The puncture and injection stabilization component 70 also includes two injection arc blocks 73 symmetrically disposed on the inner wall of the blunt needle tube 20. The injection arc blocks 73 cooperate with the elastic ball block 71. When the sharp needle tip 10 retracts back into the blunt needle tube 20 under the action of the elastic telescopic component 30, the elastic ball block 71 abuts against the end of the injection arc block 73 away from the head 50. The rebound force generated after the elastic telescopic component 30 is stretched is greater than the sum of the resistances between the elastic ball block 71 and the puncture arc block 72 and the injection arc block 73 respectively. During injection, the direction of the force exerted by the flow of the drug on the sharp needle tip 10 is opposite to the direction of the blocking force of the injection arc block 73 on the elastic ball block 71. Therefore, the injection arc block 73 is provided in cooperation with the elastic ball block 71 so that during injection, the injection arc block 73 can provide a certain degree of resistance to the outward movement of the sharp needle tip 10, thus ensuring injection stability.

[0026] The aforementioned puncture and injection stabilization component 70 also ensures that the sharp needle tip 10 is obstructed by the puncture arc block 72 and the injection arc block 73 during the process of elastically retracting back into the blunt needle tube 20. This obstruction can slow down the retraction speed of the sharp needle tip 10, thereby reducing discomfort caused by the excessively fast retraction speed of the sharp needle tip.

[0027] refer to Figure 3 , Figure 8 To smoothly and quickly guide the blunt needle 20 into the skin and improve patient comfort, the head 50 of the blunt needle 20 is chamfered and smoothed with a rounded edge.

[0028] refer to Figure 3To ensure the side holes 11 are exposed as much as possible so that they can facilitate the flow of medication into the skin tissue, when the sharp needle tip 10 retracts into the blunt needle tube 20, the head 50 of the sharp needle tip 10 is located between two adjacent side holes 11. The first side hole 11 closest to the head 50 of the blunt needle tube 20 is offset from the sharp needle tip 10, allowing the medication to flow out smoothly from this first side hole 11.

[0029] refer to Figure 1 To improve ease of use and ensure that the fixing insert 40 does not obstruct the doctor's view during the puncture procedure, the symmetrical plane of the sharp needle tip 10 forms an angle greater than zero with the common symmetrical plane of all the side holes 11; in this embodiment, the angle is 90 degrees.

[0030] refer to Figures 1-2 To facilitate the removal and removal of the fixing plug 40, the fixing plug 40 is T-shaped and includes a telescopic control rod 41 inserted into the side hole 11 and a pull bar 42 vertically disposed on the upper end of the telescopic control rod 41. In use, the telescopic control rod 41 is removed by pulling the pull bar 42.

[0031] refer to Figure 4 , Figure 6 To further achieve the pressing of the fixed insertion rod against the elastic band 32 and ensure stable puncture by the sharp needle tip 10, the inner wall of the blunt needle tube 20 is recessed with an elastic groove 80. The elastic groove 80 is located below the telescopic control rod 41. When the fixed insertion rod 40 is inserted into the side hole 11, the telescopic control rod 41 is tightly fitted into the elastic groove 80, and at the same time, the rod wall of the telescopic control rod 41 is also tightly fitted into the wall of the side hole 11.

[0032] The specific working process of this embodiment is as follows: When the aesthetic needle tip is removed, the aesthetic needle tip is in its initial state, that is, the telescopic spring 31 and the elastic band 32 are both in the stretched state, and the elastic telescopic component 30 is stably in the stretched state by the fixing plug 40, while the head 50 of the sharp needle tip 10 is exposed outside the blunt needle tube 20. When injection is required, the sharp needle tip 10 is first inserted into the skin, and the blunt needle tube 20 is inserted into the skin later along with the sharp needle tip 10. At this time, the sharp needle tip 10 is pulled back into the blunt needle tube 20 by the elastic telescopic component 30. Specifically, the fixing plug 40 is pulled out, so that it is separated from the elastic band 32. Therefore, the telescopic spring 31 and the elastic band 32 contract under their rebound force, and pull the sharp needle tip 10 completely retracted into the blunt needle tube 20, leaving only the blunt needle tube 20 in the skin tissue. The liquid medicine in the blunt needle tube 20 passes through the central through hole 611. Part of it flows into the gap between the sharp needle tip 10 and the blunt needle tube 20, and part of it flows through the flow mesh plate 62 through the sharp needle tip 10. Then, they flow out into the skin tissue through the side hole 11 or the head 50 of the blunt needle tube 20, realizing a one-time injection of the liquid medicine.

[0033] The above description is merely a specific example of this utility model and does not constitute any limitation on this utility model. Obviously, those skilled in the art, after understanding the content and principle of this utility model, may make various modifications and changes in form and details without departing from the principle and structure of this utility model. However, these modifications and changes based on the concept of this utility model are still within the protection scope of the claims of this utility model.

Claims

1. A disposable blunt aesthetic needle needle having a retractable guide needle tip, characterized in that, The device includes a sharp needle tip (10) for puncture guidance, a blunt needle tube (20) for injection, an elastic telescopic assembly (30), and a fixing plug (40). The blunt needle tube (20) has a head (50) that penetrates the skin and communicates with the outside and has multiple side holes (11). The length of the sharp needle tip (10) is shorter than the length of the blunt needle tube (20) and is movably installed inside the blunt needle tube (20) through the elastic telescopic assembly (30). The elastic telescopic assembly (30) includes a connecting telescopic spring (31) and an elastic band (32). One end of the elastic telescopic assembly (30) is connected to the inner wall of the blunt needle tube (20) through a flow connecting plate (61), and the other end is connected to the sharp needle tip (10) through a flow mesh plate (62). (61) A central through hole (611) is provided in the middle of the inner wall of the blunt needle tube (20) to allow the liquid to flow through. The flow mesh plate (62) is arranged in a grid shape with several through holes. It is located at the end of the sharp needle tip (10) away from the head (50). When the injection is in the initial state, the head (50) of the sharp needle tip (10) is exposed outside the blunt needle tube (20). The telescopic spring (31) and the elastic band (32) are both in a stretched state. The elastic band (32) is located below one of the side holes (11). A fixing plug (40) can be detachably inserted into the side hole (11). It presses the elastic band (32) tightly against the inner wall of the blunt needle tube (20). The fixing plug (40) and the side hole (11) are tightly fitted.

2. The disposable blunt aesthetic needle needle head with a retractable guide needle tip of claim 1, wherein, A puncture and injection stabilization assembly (70) is provided between the blunt needle tube (20) and the sharp needle tip (10). The puncture and injection stabilization assembly (70) includes two elastic balls (71) symmetrically arranged on the outer wall of the sharp needle tip (10) and two puncture arc blocks (72) symmetrically arranged on the inner wall of the blunt needle tube (20). When the needle is in the initial state and ready to puncture, the elastic balls (71) abut against the end of the puncture arc blocks (72) near the head (50).

3. The disposable blunt aesthetic needle needle head with a retractable guide needle tip of claim 2, wherein, The puncture and injection stabilization assembly (70) also includes two injection arc blocks (73) symmetrically disposed on the inner wall of the blunt needle tube (20). The injection arc blocks (73) cooperate with the elastic ball block (71). When the sharp needle tip (10) retracts back into the blunt needle tube (20) under the action of the elastic telescopic assembly (30), the elastic ball block (71) abuts against the end of the injection arc block (73) away from the head (50).

4. The disposable blunt aesthetic needle needle head with a retractable guide needle tip of claim 1, wherein, The blunt needle tube (20) has a chamfered head (50) and is smoothed by a rounded arc.

5. The disposable blunt aesthetic needle needle head with a retractable guide needle tip of claim 1, wherein, When the sharp needle tip (10) retracts into the blunt needle tube (20), the head (50) of the sharp needle tip (10) is located between two adjacent side holes (11), wherein the first side hole (11) near the head (50) of the blunt needle tube (20) is offset from the sharp needle tip (10).

6. The disposable blunt aesthetic needle of claim 1-5, wherein, The plane of symmetry of the sharp needle tip (10) forms an angle greater than zero with the common plane of symmetry of all the side holes (11).

7. The disposable blunt aesthetic needle needle head with a retractable guide needle tip of claim 1, wherein, The fixed connector (40) is T-shaped and includes a telescopic control rod (41) inserted into the side hole (11) and a pull bar (42) vertically disposed on the upper end of the telescopic control rod (41).

8. The disposable blunt aesthetic needle needle head with a retractable guide needle tip of claim 7, wherein, The inner wall of the blunt needle tube (20) is recessed with an elastic groove (80). The elastic groove (80) is located below the telescopic control rod (41). When the fixing plug (40) is inserted into the side hole (11), the telescopic control rod (41) is tightly fitted in the elastic groove (80), and the rod wall of the telescopic control rod (41) is also tightly fitted with the hole wall of the side hole (11).

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