Multi-needle injection needle

Abstract

The utility model relates to a multi-needle injection needle, which comprises a plurality of needles, a needle seat mechanism, a needle depth adjusting mechanism and a knob, the needles are fixedly connected with the needle seat mechanism, the needle seat mechanism is connected with the needle depth adjusting mechanism, and the needle depth adjusting mechanism is connected with the knob to form an injection structure for adjusting depth. The depth adjusting mechanism comprises a sleeve, a guide column and a depth baffle, a needle through hole is formed in the position, corresponding to the needle, of the depth baffle, a first guide column mounting hole is formed in the upper surface of the depth baffle and slidably connected with the needle seat mechanism through the guide column, the needle seat mechanism is connected with the sleeve, and a clamping bean is arranged on the inner wall of the sleeve. And the chute rotates to drive the clamping bean to move up and down to form a depth adjusting structure for driving the needle to move up and down. According to the utility model, the needle head can inject from short to long through the depth adjusting structure; and a comprehensive, three-dimensional and uniform injection effect on an injection part can be achieved through one-time injection.

Description

Technical Field

[0001] This utility model belongs to the field of medical devices, and in particular relates to a multi-needle injection needle. Background Technology

[0002] Existing multi-needle injection needles are mostly used in the beauty industry. The exposed needle length of most multi-needle injection needles on the market is only 1mm-3mm, which cannot achieve deeper injection. Single-needle injection needles are typically used for clinical injections. When injecting medication into large areas of the body surface or organs, single-needle injection needles cannot guarantee uniform injection of medication at the injection site, nor can they guarantee injection at different depths. Patent document CN 114209927 A discloses a multi-needle injection needle that reduces internal air bubbles, including a needle hub, a distributor, a needle tube, and a silicone cone sleeve. The silicone cone sleeve is compressed by the distributor to fill the adjacent ends of the first needle tube mounting hole of the needle hub and the second needle tube mounting hole of the distributor. The upper end of the needle tube is not higher than the lowest plane of the first flow channel of the distributor. Patent document CN 215194589 U discloses a multi-needle injection needle, including a multi-needle needle body, a needle shell, and an adjusting seat. The adjusting seat is rotatably fitted onto the needle shell. The needle shell has an inner partition layer, which divides the inner cavity of the needle shell into an upper assembly cavity and a lower negative pressure cavity. A columnar sleeve extending into the lower negative pressure cavity is provided on the inner partition layer. The columnar sleeve has a through hole for the needle tube to pass through. The multi-needle needle seat of the multi-needle needle body is slidably fitted into the upper assembly cavity. Several needle sleeve portions are formed on the multi-needle needle seat. The needle tube of the multi-needle needle body passes through the needle sleeve portions and is fixed on the needle sleeve portions. The connector of the multi-needle needle body is threaded onto the adjusting seat. A rubber sealing device is provided in the upper assembly cavity of the needle shell to form a sliding sealing fit between the multi-needle needle seat and the inner wall of the needle shell. Patent document CN 209347811 U discloses a combined multi-needle syringe, including a syringe barrel with a shunt chamber at one end. A partition is located in the middle of the shunt chamber, and a bottom cover is detachably connected to the lower end of the shunt chamber. The bottom cover has multiple annular tracks, and multiple conduits communicating with the upper part of the shunt chamber are located at the lower end of the partition. A needle connector is located at the end of each conduit away from the partition, and the needle connector is slidably connected within the annular tracks. The needle connector has a locking structure for fixed connection to the annular tracks. Currently, multi-needle injection needles can only be used with devices and cannot be used manually after being connected to a syringe. This results in drawbacks such as inconvenience in carrying the device, cumbersome operation, and high price, and its application is mainly in the cosmetic industry. Therefore, there is an urgent clinical need to develop a multi-needle injection needle for injection into the body surface or internal organs. Utility Model Content

[0003] The present invention aims to overcome the shortcomings of the prior art by providing a multi-needle injection needle that can achieve a comprehensive, three-dimensional, and uniform injection effect at the injection site, and allows for depth adjustment.

[0004] To achieve the above objectives, this utility model provides a multi-needle injection needle, comprising several needles 1, a needle seat mechanism 2, a needle depth adjustment mechanism 3, and a knob 4. The needles are fixedly connected to the needle seat mechanism, and the needle seat mechanism is connected to the needle depth adjustment mechanism. A knob is connected to the needle depth adjustment mechanism, forming an injection structure for adjusting the depth. The depth adjustment mechanism 3 includes a sleeve 31, a guide post 32, and a depth baffle 33. A needle through hole 332 is provided on the depth baffle corresponding to the needle position. A first guide post mounting hole 331 is symmetrically provided on the upper surface of the depth baffle. The first guide post mounting hole is slidably connected to the needle seat mechanism through the guide post 32. The needle seat mechanism is connected to the sleeve 31. A locking bead 313 is provided on the inner wall of the sleeve 31. The locking bead is screwed into the spiral groove 41 of the knob 4. The rotation of the groove drives the locking bead to move up and down, forming a depth adjustment structure that realizes the up and down movement of the needle.

[0005] Furthermore, the needle seat mechanism includes a needle seat 21 and a needle seat support 22. The lower surface of the needle seat 21 is evenly distributed with a plurality of needle protrusions. A needle mounting hole 211 is provided in the center of the needle protrusion 216. The upper surface of the needle seat 21 is provided with an inlet hole 212 communicating with the needle mounting hole. The upper surface of the needle seat 21 is provided with a positioning pin 215 connected to the needle seat support 22. The side end of the needle seat 21 is provided with a guide tube mounting groove 214. A column 223 is fixedly connected to the upper surface of the needle seat support 22. The column 223 is slidably connected to the knob 4 of the depth adjustment mechanism. The needle seat 21 and the needle seat support 22 are respectively provided with a second guide post hole 226. The second guide post hole 226 is slidably connected to the guide post. The guide post is connected to the guide post mounting hole 331 of the sleeve 31.

[0006] Furthermore, the lower end of the guide post 32 is connected to the guide post mounting hole 331 of the depth baffle 33, and the upper end of the guide post 32 is connected to the guide post mounting hole 311 of the sleeve 31, forming a guide structure for depth adjustment.

[0007] Furthermore, the needle holder bracket 22 has a circular guide tube mounting groove 222 on its side end. After the needle holder bracket and the needle holder are fastened together, the circular guide tube mounting groove forms a guide tube mounting hole 23.

[0008] Furthermore, the lower surface of the needle holder 22 is provided with a flow channel 221, which covers the inlet holes 212 of all needles 1.

[0009] Furthermore, the distal end of the column of the needle holder is provided with an annular groove 224 and a stop groove 225.

[0010] Furthermore, the sleeve 31 is provided with a column positioning hole 312 inside, and a locking bead 313 is provided on the inner wall of the sleeve 31. The locking bead slides in the inclined groove on the outer circular surface of the knob 2, and the sleeve 31 drives the depth adjustment structure 3 to move simultaneously.

[0011] Furthermore, the upper outer circle of the knob 4 is provided with a toothed structure 42, the inner wall of the knob 4 is provided with a limit protrusion 43 and a stop rib 44, and the knob is provided with an indicator mark 45.

[0012] Furthermore, the outer wall of the sleeve 31 is provided with scale markings 314.

[0013] Furthermore, a catheter 5 is fixedly connected to the catheter mounting hole 23, and the other end of the catheter is connected to a Luer connector 6. One end of the Luer connector 6 is connected to a conventional syringe, and the other end is connected to the catheter 5.

[0014] Furthermore, a protective sleeve 8 is fixedly attached to the needle seat mechanism.

[0015] Beneficial effects: Compared with existing technologies, this invention includes multiple needles of uniform length and spacing, ensuring uniform drug delivery to the injection site. Furthermore, it incorporates a depth adjustment structure, enabling injection from short to long needles. In use, a conventional syringe filled with medication is connected to the Luer connector, and the depth adjustment mechanism allows for comprehensive, three-dimensional, and uniform injection at the injection site in a single injection. This is particularly suitable for injecting medication into large areas of the body surface or organs, ensuring drug delivery at different depths. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional view of the main view of this utility model;

[0018] Figure 3 This is a cross-sectional view of the side view of this utility model;

[0019] Figure 4 This is a schematic diagram of a multi-needle fixing base mechanism;

[0020] Figure 5A This is a schematic diagram of the upper surface structure of the needle hub;

[0021] Figure 5B This is a schematic diagram of the lower surface structure of the needle holder;

[0022] Figure 6A This is a schematic diagram of the lower surface structure of the needle holder support;

[0023] Figure 6B This is a schematic diagram of the upper surface structure of the needle holder;

[0024] Figure 7 This is an exploded view of the depth adjustment mechanism;

[0025] Figure 8 This is a schematic diagram of the sleeve structure;

[0026] Figure 9A This is a schematic diagram of the knob's inclined groove structure;

[0027] Figure 9B This is a schematic diagram of the internal structure of the knob's tooth-like shape.

[0028] In the diagram: 1. Multi-needle needle; 2. Seat mechanism; 21. Needle seat; 211. Needle mounting hole; 212. Inlet hole; 213. Guide post hole; 214. Guide tube mounting groove one; 22. Needle seat bracket; 221. Flow channel; 222. Guide tube mounting groove two; 223. Column; 224. Annular groove; 225. Stop groove; 226. Guide post hole two; 23. Guide tube mounting hole; 3. Needle depth adjustment mechanism. 31. Sleeve; 311. Guide post mounting hole 2; 312. Post positioning hole; 313. Snap-fit; 314. Scale mark; 32. Guide post; 33. Depth baffle; 331. Guide post mounting hole 1; 332. Needle through hole; 4. Knob; 41. Slanted groove; 42. Toothed structure; 43. Limiting protrusion; 44. Stop rib; 45. Indicator mark; 5. Guide tube; 6. Luer connector; 8. Protective sleeve. Detailed Implementation

[0029] The following detailed description of the specific implementation of the present invention, in conjunction with preferred embodiments, is provided in the accompanying drawings. This embodiment provides a multi-needle injection needle, comprising several needles 1, a needle seat mechanism 2, a needle depth adjustment mechanism 3, and a knob 4. The needles are fixedly connected to the needle seat mechanism, and the needle seat mechanism is connected to the needle depth adjustment mechanism. A knob is connected to the needle depth adjustment mechanism, forming an injection structure for adjusting the depth. The depth adjustment mechanism 3 includes a sleeve 31, a guide post 32, and a depth baffle 33. A needle through hole 332 is provided on the depth baffle corresponding to the needle position. A first guide post mounting hole 331 is symmetrically provided on the upper surface of the depth baffle. The first guide post mounting hole is slidably connected to the needle seat mechanism through the guide post 32. The needle seat mechanism is connected to the sleeve 31. A locking bead 313 is provided on the inner wall of the sleeve 31. The locking bead is screwed into the spiral groove 41 of the knob 4. The rotation of the groove drives the locking bead to move up and down, forming a depth adjustment structure that realizes the up and down movement of the needle.

[0030] In a preferred embodiment, the needle seat mechanism includes a needle seat 21 and a needle seat support 22. The lower surface of the needle seat 21 is evenly distributed with several needle protrusions. A needle mounting hole 211 is provided in the center of each needle protrusion 216. The upper surface of the needle seat 21 is provided with an inlet hole 212 communicating with the needle mounting hole. A positioning pin 215 connected to the needle seat support 22 is provided on the upper surface of the needle seat 21. A semi-circular guide tube mounting groove 214 is provided on the side end of the needle seat 21. A column 223 is fixedly connected to the upper surface of the needle seat support 22. The column 223 is slidably connected to the knob 4 of the depth adjustment mechanism. A second guide post hole 226 is correspondingly provided on the needle seat 21 and the needle seat support 22. The second guide post hole 226 is slidably connected to the guide post. The guide post is connected to the guide post mounting hole 331 of the sleeve 31.

[0031] In a preferred embodiment, the lower end of the guide post 32 is connected to the guide post mounting hole 331 of the depth baffle 33, and the upper end of the guide post 32 is connected to the guide post mounting hole 311 of the sleeve 31, thus forming a guide structure for depth adjustment.

[0032] In a preferred embodiment, the needle holder bracket 22 is provided with a circular guide tube mounting groove 222 on its side end. After the needle holder bracket and the needle holder are fastened together, the circular guide tube mounting groove forms a guide tube mounting hole 23.

[0033] In a preferred embodiment, the lower surface of the needle holder 22 is provided with a flow channel 221, which covers the inlet holes 212 of all needles 1.

[0034] In a preferred embodiment, the distal end of the column of the needle holder is provided with an annular groove 224 and a stop groove 225.

[0035] In a preferred embodiment, the sleeve 31 is provided with a column positioning hole 312 inside, and the inner wall of the sleeve 31 is provided with a locking bead 313. The locking bead slides in the inclined groove on the outer circular surface of the knob 2, and the sleeve 31 drives the depth adjustment structure 3 to move simultaneously.

[0036] In a preferred embodiment, the upper outer circle of the knob 4 is provided with a toothed structure 42, the inner wall of the knob 4 is provided with a limit protrusion 43 and a stop rib 44, and the knob is provided with an indicator mark 45.

[0037] In a preferred embodiment, the outer wall of the sleeve 31 is provided with scale markings 314.

[0038] In a preferred embodiment, the catheter 5 is fixedly connected to the catheter mounting hole 23, and the other end of the catheter is connected to the Luer connector 6. One end of the Luer connector 6 is connected to a conventional syringe, and the other end is connected to the catheter 5.

[0039] In a preferred embodiment, a protective sleeve 8 is fixedly attached to the needle seat mechanism.

[0040] The working principle and process of this utility model will be further explained below in conjunction with its structure.

[0041] See appendix for details Figure 1 -9, specifically including multi-needle needle 1, seat mechanism 2, needle depth adjustment mechanism 3, knob 4, protective sleeve 8, catheter 5, Luer tee connector 6.

[0042] The multi-needle needle 1 is inserted into the base mechanism 2;

[0043] The base mechanism 2 includes a needle holder 21 and a needle holder support 22. One end of the needle holder 21 is provided with a needle mounting hole 211, and the horizontal and vertical spacing of the needle mounting holes 211 is consistent. The other end of the needle holder 21 is provided with an inlet hole 212 corresponding to the needle 1, which connects to the mounting hole 211 and extends through the entire needle holder 21. The needle holder 21 is provided with a guide post hole 213, which extends through the entire needle holder 21. The other end of the needle holder 21 is provided with a guide tube mounting groove 214. The other end of the needle holder 21 is connected to the needle holder support 22. One end of the needle holder support 22 is provided with a flow channel 221, which covers all the inlet holes 212 of the needle 1. One end of the needle holder support 22 is provided with a guide tube mounting groove 222, which connects with the guide tube mounting groove 214 to form a guide tube mounting hole 23. The needle holder bracket 22 has a column 223 at one end, and an annular groove 224 and a stop groove 225 at the far end of the column 223. The needle holder bracket 22 has a second guide hole 226 that penetrates the entire needle holder bracket 22 and coincides with the first guide hole 213. In this embodiment, the multi-needle needle 1 is inserted into the needle mounting hole 211 of the needle holder 21 and glued to fix the needle 1. The needle holder 21 and the needle holder bracket 22 are fixed by ultrasonic welding.

[0044] The depth adjustment mechanism 3 includes a sleeve 31, a guide post 32, and a depth baffle 33. One end of the depth baffle 33 has a guide post mounting hole 331. The depth baffle 33 also has a needle through hole 332 that penetrates the entire depth baffle 33. One end of the sleeve 31 has a guide post mounting hole 311. The sleeve 31 has a column positioning hole 312 inside. A locking bead 313 is provided on the inner wall of the sleeve 31. A scale mark 314 is provided on the outer wall of the sleeve 31. One end of the guide post 32 is connected to the guide post mounting hole 331 of the depth baffle 33, and the other end of the guide post 32 is connected to the guide post mounting hole 311 of the sleeve 31. In this embodiment, one end of the guide post 32 is installed into the guide post mounting hole 331 of the depth baffle 33 and fixed with adhesive. With the other end of the guide post 32 facing the needle 1, the guide post 32 passes through the guide post hole 213 and the guide post hole 226 of the seat mechanism 2, while ensuring that the needle through hole 332 on the depth baffle 33 passes through the needle 1. The column positioning hole 312 of the sleeve 31 passes through the column 223 of the needle seat bracket 22, and the guide post mounting hole 311 is connected to the other end of the guide post 32. Glue is applied to fix it, ensuring that the depth baffle 33, the guide post 32, and the sleeve 31 form a fixed integral structure.

[0045] The knob 4 has a groove 41 on one outer surface and a toothed structure 42 on the other. The inner wall of the knob 4 has a limiting protrusion 43 and a stop rib 44. An indicator mark 45 is located on the other end of the knob. In this embodiment, the groove 41 of the knob 4 is pressed against the column 223 of the needle holder bracket 22, and the stop rib 44 is aligned with the stop groove 225 of the needle holder bracket 22. Then, the knob 4 is pushed, causing the limiting protrusion 43 of the knob 4 to engage with the annular groove 224 of the needle holder bracket 22, thus ensuring the knob 4 is fixed in the axial direction. Simultaneously, the groove 41 of the knob 2 encloses the locking bead 313 of the sleeve 31. The groove 41 and the locking bead 313 form a mating structure, allowing the locking bead 313 to slide within the groove 41. This causes the sleeve 31 to move simultaneously with the entire depth adjustment structure 3, further realizing different lengths of exposed needle tip 1.

[0046] In this embodiment, one end of the conduit 5 is connected to the conduit mounting hole 23, which is composed of the conduit mounting groove 214 of the needle seat 21 and the conduit mounting groove 222 of the needle seat bracket 22, and the other end of the conduit 5 is connected to the Luer connector 6.

[0047] In this embodiment, one end of the Luer connector 6 is connected to a conventional syringe, and the other end is connected to the catheter 5;

[0048] In this embodiment, the protective sleeve 8 is interference-fitted with the base mechanism 2, so that the needle 1 is protected inside the protective sleeve 8;

[0049] Working principle

[0050] This product is individually packaged, with the syringe connected to the Luer connector 6. To use, load the syringe with the medication and connect it to the Luer connector. Remove the protective sleeve 8 from each multi-needle injection needle. Push the syringe plunger, ensuring all needles 1 of the multi-needle injection needle are at the critical leakage point. Hold the toothed structure 42 of the knob 4 and rotate it. Under the rotational force, the inclined groove 41 of the knob 4 drives the locking bead 313 of the sleeve 31 to move up and down, thereby adjusting the depth of the depth adjustment structure 3. This allows the depth baffle 33 to adjust the exposed needle length. Simultaneously, under the rotational force, the stop rib 44 of the knob 4 moves from one stop groove 225 to another, and the indicator mark 45 of the knob 4 points from one graduation mark 314 to an adjacent graduation mark 314. This achieves precise control of the needle length 1. Insert the needle 1 of this multi-needle injection needle into the injection site and push the syringe plunger to inject the prescribed amount of medication. This injection process is repeated until the entire lesion site is treated. This method allows for three-dimensional, precise, and uniform injection at the injection site.

[0051] The above detailed description of a multi-needle injection needle with reference to the embodiments is illustrative rather than limiting. Several embodiments can be listed according to the defined scope. Therefore, changes and modifications without departing from the overall concept of this utility model should be within the protection scope of this utility model.

Claims

1. A multi-needle injection needle, characterized in that: The device includes several needles, a needle hub mechanism, a needle depth adjustment mechanism, and a knob. The needles are fixedly connected to the needle hub mechanism, which is connected to the needle depth adjustment mechanism. The needle depth adjustment mechanism is equipped with a knob, forming an injection depth adjustment structure. The depth adjustment mechanism includes a sleeve, a guide post, and a depth baffle. The depth baffle has a needle through hole corresponding to the needle position. The upper surface of the depth baffle has symmetrical first guide post mounting holes, which are slidably connected to the needle hub mechanism through the guide post. The needle hub mechanism is connected to the sleeve. The inner wall of the sleeve has a locking bead, which is screwed into the spiral groove of the knob. The rotation of the groove drives the locking bead to move up and down, forming a depth adjustment structure that realizes the up and down movement of the needle.

2. The multi-needle injection needle according to claim 1, characterized in that: The needle holder mechanism includes a needle holder and a needle holder support. The lower surface of the needle holder has several needle protrusions evenly distributed, with a needle mounting hole in the center of each protrusion. The upper surface of the needle holder has an inlet hole communicating with the needle mounting hole. The upper surface of the needle holder also has a positioning pin connected to the needle holder support. A guide tube mounting groove is provided at the side end of the needle holder. A column is fixedly connected to the upper surface of the needle holder support. The column is slidably connected to the knob of the depth adjustment mechanism. The needle holder and needle holder support each have a corresponding second guide post hole, which is slidably connected to the guide post. The guide post is connected to the guide post mounting hole of the sleeve.

3. The multi-needle injection needle according to claim 1, characterized in that: The lower end of the guide post is connected to the guide post mounting hole of the depth baffle, and the upper end of the guide post is connected to the guide post mounting hole of the sleeve, forming a guide structure for depth adjustment.

4. The multi-needle injection needle according to claim 2, characterized in that: The needle holder bracket has a circular guide tube mounting groove on its side end. After the needle holder bracket and the needle holder are fastened together, the circular guide tube mounting groove forms a guide tube mounting hole.

5. The multi-needle injection needle according to claim 2 or 4, characterized in that: The lower surface of the needle holder is provided with a flow channel, which covers the inlet holes of all needles.

6. The multi-needle injection needle according to claim 5, characterized in that: The distal end of the column of the needle holder is provided with an annular groove and a stop groove.

7. The multi-needle injection needle according to claim 1, characterized in that: The sleeve has a column positioning hole inside and a locking bead on the inner wall of the sleeve. The locking bead slides in the inclined groove on the outer surface of the knob. The sleeve drives the depth adjustment structure to move at the same time. The outer wall of the sleeve has scale markings.

8. The multi-needle injection needle according to claim 1, characterized in that: The upper outer circle of the knob has a toothed structure, the inner wall of the knob is provided with limit protrusions and stop ribs, and the knob is provided with indicator marks.

9. The multi-needle injection needle according to claim 4, characterized in that: The catheter is fixedly connected to the catheter mounting hole, and the other end of the catheter is connected to a Luer connector. One end of the Luer connector is connected to a conventional syringe, and the other end is connected to the catheter.

10. The multi-needle injection needle according to claim 1, characterized in that: A protective sleeve is fixedly attached to the needle seat mechanism.

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