A cosmetic pre-filled adjustable-depth microneedle delivery device

Abstract

The utility model relates to micro -needle injection technical field discloses a pre -filled adjustable depth microneedle administration device for beauty, including installation cylinder and storage pipe, the installation cylinder outside thread has the adjusting cover, the installation cylinder is fixedly connected with the connecting joint, the installation cylinder top fixedly connected with the connecting joint, the installation cylinder inside top fixedly connected with the mounting rod, the mounting rod lower end fixedly connected with array base, array base lower end fixedly connected with a plurality of needle holder, the needle holder is fixedly connected with the microneedle in, one end of storage pipe is fixedly connected with the finger plate, and the piston is connected in the storage pipe and inserts, and the piston one end is fixedly connected with the push rod. Thread adjustable adjusting cover can adjust the depth of microneedle penetration, adapt to different skin quality and operating site, solve the depth fixed of traditional device, the poor problem of scene adaptability, and adopt the piston pressure to push the administration, completely avoid the disadvantage that gravity liquid out is not smooth, and the liquid output is not steady, and the liquid medicine is along the microneedle synchronous into the deep layer of skin through the shunt structure, and the liquid medicine penetration efficiency and utilization are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of microneedle injection technology, and in particular to a pre-filled adjustable depth microneedle drug delivery device for cosmetic use. Background Technology

[0002] Cosmetic microneedle injection devices are minimally invasive drug delivery devices commonly used in the field of cosmetic dermatology. They can precisely deliver cosmetic drugs into the deep tissues of the skin. The overall structure is simple, and the core components usually include a microneedle array, an operating handle, and a device shell. The microneedles used in these devices are generally made of safe materials that meet medical standards. The needles are extremely fine in diameter, penetrating only the stratum corneum of the skin's surface during puncture, without damaging deep subcutaneous nerves and blood vessels. The procedure produces only mild pain, making it highly acceptable to users. Among existing related technologies, Chinese utility model patent CN223641175U discloses a beauty serum infusion device. The main body of this device includes a medicine storage bottle, the bottom of which is connected to a cap via a threaded structure. Multiple microneedles are arranged on the lower surface of the cap, with micropores between the microneedles for guiding the beauty serum. Simultaneously, multiple support pillars are also provided at the bottom of the cap, with a pressing panel mounted between the support pillars around the microneedles. This solution integrates medicine storage, serum application, and microneedle acupuncture functions into one unit, achieving a certain degree of integrated design and simplifying the operation process. However, in actual clinical and daily use scenarios, the microneedle puncture depth of this device is a fixed value and cannot be flexibly adjusted according to different operation sites and differences in the skin type of users. The adaptability of the scenario is poor. In addition, during operation, the liquid medicine is first applied to the skin surface and then punctured through the microneedle. This results in most of the liquid medicine remaining on the skin surface after the microneedle forms a drug delivery channel in the skin. It cannot efficiently enter the skin channel opened by the microneedle, and the transdermal penetration efficiency of the beauty liquid is greatly reduced, making it difficult to achieve the expected drug delivery and beauty effect. Utility Model Content

[0003] The purpose of this invention is to provide a pre-filled adjustable depth microneedle drug delivery device for cosmetic use. It adopts a pre-filled drug storage structure combined with a pressure dispensing method, so that the drug solution can directly enter the skin channel along the surface of the microneedle, thereby improving the absorption efficiency and effectively solving the problems in the background technology.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A pre-filled adjustable depth microneedle drug delivery device for cosmetic use includes a mounting cylinder and a drug reservoir. An adjustment cover is threaded onto the outer side of the mounting cylinder. A connecting joint is fixedly connected to the mounting cylinder. A mounting rod is fixedly connected to the top of the mounting cylinder. An array base is fixedly connected to the lower end of the mounting rod. Several needle seats are fixedly connected to the lower end of the array base. Microneedles are fixedly connected inside the needle seats. A finger plate is fixedly connected to one end of the drug reservoir. A piston is inserted into the drug reservoir. A push rod is fixedly connected to one end of the piston. A limiter is engaged on the drug reservoir near the finger plate. The end of the drug reservoir away from the finger plate is threadedly connected to the connecting joint.

[0005] Preferably, an annular silicone pad is fixedly connected to the lower end of the adjustment cover along the contour to spread the medicine evenly on the skin surface.

[0006] Preferably, a guide hole is provided in the middle of the mounting rod to guide the liquid medicine in the storage tube into the array substrate. A mounting groove is provided at the lower end of the mounting rod, and the mounting groove is connected to the guide hole to provide a mounting foundation for the connection between the array substrate and the mounting rod.

[0007] Preferably, a retaining ring is fixedly connected to the array base, the retaining ring is snapped into the mounting groove, a diversion cavity is opened in the array base, and a number of diversion holes are opened at the bottom of the diversion cavity. The diversion holes are arranged in groups of three around the corresponding needle seat. After the liquid medicine in the medicine storage tube enters the diversion cavity through the guide hole, it is discharged through the multiple diversion holes.

[0008] Preferably, the needle hub has several flow channels circumferentially formed on its outer side. The flow channels are located below the corresponding diversion holes. The medicine discharged from the diversion holes flows along the flow channels to the microneedle and along the extension path of the microneedle, so that the medicine can enter the skin more efficiently when the microneedle is inserted into the skin.

[0009] Preferably, the limiter includes a connecting rod, and a limit plate and an upper retaining ring and a lower retaining ring are fixedly connected to one side of the connecting rod from bottom to top. The lower retaining ring is engaged with the outside of the drug storage tube, the upper retaining ring is inserted through the outside of the push rod and abuts against the finger plate, and the limit plate abuts against the end of the push rod away from the piston, which is used to prevent the push rod from being accidentally pressed when the drug storage tube is not in use.

[0010] Compared with the prior art, the present invention has the following beneficial effects: In this invention, the adjustable screw thread cover can adjust the microneedle insertion depth to suit different skin types and operating sites, solving the problems of fixed depth and poor adaptability of traditional devices. The piston pressure push drug delivery completely avoids the drawbacks of poor gravity-driven liquid delivery and unstable liquid volume. The drug solution enters the deep skin layer synchronously along the microneedle through the diversion structure, greatly improving the drug penetration efficiency and utilization rate. At the same time, the pre-filled disposable design with the anti-accidental contact limiter not only eliminates the risk of cross-infection, but also improves the safety and convenience of operation. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a sectional view of the mounting cylinder and adjusting cover of this utility model; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the array substrate structure of this utility model; Figure 5 This is a schematic diagram of the assembly structure of the drug storage tube and the limiter of this utility model. Figure 6 This is a cross-sectional view of the medicine storage tube and limiter of this utility model.

[0012] In the diagram: 1. Mounting cylinder; 2. Drug storage tube; 3. Adjusting cover; 4. Mounting rod; 5. Array base; 6. Needle seat; 7. Microneedle; 8. Connecting joint; 9. Finger plate; 10. Piston; 11. Push rod; 12. Limiter; 13. Mounting groove; 14. Guide hole; 15. Diverting chamber; 16. Diverting hole; 17. Guide groove; 18. Snap ring; 19. Connecting rod; 20. Limiting plate; 21. Upper snap ring; 22. Lower snap ring. Detailed Implementation

[0013] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0014] like Figures 1-6As shown, this utility model provides a pre-filled adjustable depth microneedle drug delivery device for cosmetic use, including a mounting cylinder 1 and a drug storage tube 2. An adjustment cover 3 is threadedly connected to the outside of the mounting cylinder 1. A connecting joint 8 is fixedly connected to the mounting cylinder 1. An mounting rod 4 is fixedly connected to the top inside the mounting cylinder 1. An array base 5 is fixedly connected to the lower end of the mounting rod 4. Several needle seats 6 are fixedly connected to the lower end of the array base 5. Microneedles 7 are fixedly connected inside the needle seats 6. A finger plate 9 is fixedly connected to one end of the drug storage tube 2. A piston 10 is inserted into the drug storage tube 2. A push rod 11 is fixedly connected to one end of the piston 10. A limiter 12 is snapped onto the drug storage tube 2 near the finger plate 9. The end of the drug storage tube 2 away from the finger plate 9 is threadedly connected to the connecting joint 8.

[0015] like Figures 1-2 As shown, a ring-shaped silicone pad is fixedly connected to the lower end of the adjustment cover 3 along the contour, which is used to spread the medicine on the skin surface evenly.

[0016] like Figures 2-4 As shown, a guide hole 14 is provided in the middle of the mounting rod 4 to guide the liquid medicine in the storage tube 2 into the array base 5. A mounting groove 13 is provided at the lower end of the mounting rod 4, and the mounting groove 13 is connected to the guide hole 14 to provide a mounting base for the connection between the array base 5 and the mounting rod 4. A retaining ring 18 is fixedly connected to the array base 5 and is snapped into the mounting groove 13. A diversion cavity 15 is provided in the array base 5, and several diversion channels are provided at the bottom of the diversion cavity 15. The three orifices 16 and the diversion orifices 16 are arranged in a group around the corresponding needle base 6. After the liquid medicine in the drug storage tube 2 enters the diversion cavity 15 through the guide hole 14, it is discharged through multiple diversion orifices 16. Several guide grooves 17 are opened on the outer circumference of the needle base 6. The guide grooves 17 are located below the corresponding diversion orifices 16. The liquid medicine discharged from the diversion orifice 16 flows along the guide grooves 17 to the microneedle 7 and flows along the extension path of the microneedle 7, so that the liquid medicine can enter the skin more efficiently when the microneedle 7 is inserted into the skin.

[0017] like Figures 5-6 As shown, the limiter 12 includes a connecting rod 19. From bottom to top, a limit plate 20, an upper retaining ring 21, and a lower retaining ring 22 are fixedly connected to one side of the connecting rod 19. The lower retaining ring 22 is engaged with the outside of the drug storage tube 2. The upper retaining ring 21 is inserted through the outside of the push rod 11 and abuts against the finger plate 9. The limit plate 20 abuts against the end of the push rod 11 away from the piston 10, which is used to prevent the push rod 11 from being accidentally pressed when the drug storage tube 2 is not in use.

[0018] It should be noted that this utility model is a pre-filled adjustable depth microneedle drug delivery device for cosmetic use. Before use, first tear open the aluminum film seal at one end of the drug storage tube 2 to complete the pretreatment before drug delivery. Hold the installation cylinder 1 and fix the connecting connector 8 fixed on the installation cylinder 1 to the drug storage tube 2 by screwing it on, thus completing the sealed connection between the installation cylinder 1 and the drug storage tube 2. Then rotate the adjustment cover 3 on the outside of the installation cylinder 1. By adjusting the contact limit between the adjustment cover 3 and the skin, the depth of the microneedle 7 inserted into the skin can be precisely adjusted to suit different operating sites and skin types. After completing the depth adjustment, first remove the limiter 12 that is snapped on the drug storage tube 2, and flatten the annular silicone pad at the lower end of the adjustment cover 3 onto the skin surface. Then, slowly and evenly press the push rod 11 to drive the piston 10 in the drug storage tube 2 forward, pressing the pre-filled drug in the drug storage tube 2 into the guide hole 14 inside the mounting rod 4. The drug is delivered to the diversion cavity 15 inside the array base 5 through the guide hole 14. After the drug is evenly distributed in the diversion cavity 15, it flows out downward through the diversion hole 16 and flows along the guide groove 17 on the outer periphery of the needle seat 6, evenly wrapping the surface of the microneedle 7. At this time, press the device lightly, and the microneedle 7 penetrates the stratum corneum of the skin to form a fine drug delivery channel. The drug wrapped on the surface of the microneedle 7 enters the deep layer of the skin synchronously with the acupuncture action to complete the drug delivery. This device is designed for single use only. After all operations are completed, the entire device should be disposed of in accordance with regulations to prevent cross-infection and hygiene hazards caused by reuse.

[0019] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pre-filled adjustable depth microneedle drug delivery device for cosmetic use, characterized in that: It includes an installation cylinder (1) and a medicine storage tube (2). An adjustment cover (3) is threadedly connected to the outside of the installation cylinder (1). A connecting joint (8) is fixedly connected to the installation cylinder (1). An installation rod (4) is fixedly connected to the top of the installation cylinder (1), and an array base (5) is fixedly connected to the lower end of the installation rod (4). Several needle seats (6) are fixedly connected to the lower end of the array base (5), and micro needles (7) are fixedly connected inside the needle seats (6). One end of the drug storage tube (2) is fixedly connected to a finger plate (9), a piston (10) is inserted inside the drug storage tube (2), a push rod (11) is fixedly connected to one end of the piston (10), a limiter (12) is snapped onto the drug storage tube (2) near the finger plate (9), and the end of the drug storage tube (2) away from the finger plate (9) is threaded onto the connecting joint (8).

2. The pre-filled adjustable depth microneedle drug delivery device for cosmetic use according to claim 1, characterized in that: The lower end of the adjustment cover (3) is fixedly connected with an annular silicone pad along the contour.

3. The pre-filled adjustable depth microneedle drug delivery device for cosmetic use according to claim 1, characterized in that: A guide hole (14) is provided in the middle of the mounting rod (4), and a mounting groove (13) is provided at the lower end of the mounting rod (4), and the mounting groove (13) is connected to the guide hole (14).

4. The pre-filled adjustable depth microneedle drug delivery device for cosmetic use according to claim 3, characterized in that: A buckle (18) is fixedly connected to the array base (5). The buckle (18) is snapped into the mounting groove (13). A diversion cavity (15) is opened in the array base (5). Several diversion holes (16) are opened at the bottom of the diversion cavity (15). The diversion holes (16) are arranged in groups of three around the corresponding needle seat (6).

5. A pre-filled adjustable depth microneedle drug delivery device for cosmetic use according to claim 4, characterized in that: The needle seat (6) has several guide grooves (17) circumferentially opened on the outer side, and the guide grooves (17) are located below the corresponding diversion holes (16).

6. The pre-filled adjustable depth microneedle drug delivery device for cosmetic use according to claim 1, characterized in that: The limiter (12) includes a connecting rod (19), and a limit plate (20) and an upper retaining ring (21) and a lower retaining ring (22) are fixedly connected from bottom to top on one side of the connecting rod (19).

7. A pre-filled adjustable depth microneedle drug delivery device for cosmetic use according to claim 6, characterized in that: The lower retaining ring (22) is engaged with the outside of the drug storage tube (2), the upper retaining ring (21) is inserted through the outside of the push rod (11) and abuts against the finger plate (9), and the limiting plate (20) abuts against the end of the push rod (11) away from the piston (10).

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