Array microneedle injection device

Abstract

The array type micro-needle injection device comprises a driving cover, a main body, a micro-needle injection plate and a liquid injection module, a liquid injection module is arranged in the main body; the microneedle injection plate is arranged on the lower side of the body and connected with the liquid outlet end of the liquid injection module in a sealed mode. The driving cover is rotatably arranged on the upper side of the main body in a sleeving manner; a metering part is slidably arranged in the driving cover, scales are arranged on the upper side of the metering part, the lower side of the metering part abuts against the top of the liquid injection module, and the metering part is used for driving the liquid injection module to inject liquid; a locking part is arranged in the main body, the locking part is used for locking the liquid injection module, and the liquid injection module cannot inject liquid in a locking state; and during liquid injection, the locking part is in a release state. The liquid injection module in the array type micro-needle injection device is in a locking state in a normal state and is only switched to a release state during use, so that multiple times of liquid injection at different positions can be realized, and the use convenience is improved.

Description

Technical Field

[0001] This invention relates to the field of syringes, and in particular to array-type microneedle injection devices. Background Technology

[0002] Traditional microneedle injection devices face two major technical bottlenecks in clinical applications: First, the uniformity of fluid injection is severely lacking. Due to the shared single drug chamber, uneven distribution of drug flow resistance leads to a 2.3-fold difference in injection volume between the central and peripheral microneedles. This is particularly problematic when delivering large molecule drugs (such as insulin and monoclonal antibodies), where bioavailability fluctuations can reach as high as 40%, significantly impacting therapeutic stability. Second, the operation process is cumbersome and the injection efficiency is low. Existing devices require repeated manual reset of the drive mechanism, increasing the time required for treatment at multiple sites. Therefore, there is an urgent need to develop an array-type microneedle device with independent, multi-channel fluid supply and convenient operation to improve injection uniformity and ease of use. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides an array-type microneedle injection device, comprising: a drive cap, a main body, a microneedle injection plate, and an injection module; the injection module is disposed inside the main body; the microneedle injection plate is disposed on the lower side of the main body and is sealed to the liquid outlet end of the injection module; the drive cap is rotatably sleeved on the upper side of the main body; a metering element is slidably disposed inside the drive cap, the upper side of the metering element is provided with a scale, and its lower side abuts against the top of the injection module for driving the injection module to inject liquid;

[0004] The main body is provided with a locking part, which is used to lock the liquid injection module. In the locked state, the liquid injection module cannot inject liquid; when injecting liquid, the locking part is in the released state.

[0005] Optionally, the measuring component includes a drive rod, a limiting ring, and a limiting strip; the limiting ring is disposed on the outside of the drive rod, and the limiting strip is disposed on both sides of the drive rod; a drive spring is sleeved on the outside of the drive rod, and the drive spring is disposed between the drive cover and the limiting ring; the top of the drive cover is provided with a limiting sliding hole that matches the measuring component.

[0006] Optionally, the microneedle injection plate includes a porous plate, microneedles, and a circular plate; the circular plate is disposed around the porous plate, and the microneedle array is distributed on the porous plate; liquid holes are provided on the microneedles.

[0007] Optionally, the injection module includes a propulsion section and a receiving section; the propulsion section includes a propulsion head and a propulsion rod; the receiving section has a liquid receiving hole inside; the propulsion rod is clearance-fitted with the liquid receiving hole, and the propulsion rod is slidably disposed in the liquid receiving hole; multiple sets of the propulsion rod and the liquid receiving hole are provided, and their positions correspond to the microneedle; the propulsion rod, the liquid receiving hole, and the microneedle are coaxially arranged.

[0008] Optionally, the lower side of the receiving portion is provided with an array of elastic sealing rings, and a sealing ring is provided on the lower side of each liquid-containing hole.

[0009] Optionally, the locking part includes an arc-shaped plate, a guide rod, and a return spring; the guide rod is disposed on the outward-facing arc surface of the arc-shaped plate; the return spring is sleeved on the outside of the guide rod; the main body is provided with a sliding groove of matching size corresponding to the position of the guide rod; the guide rod is slidably disposed inside the sliding groove; there are two arc-shaped plates symmetrically disposed on both sides of the pushing part.

[0010] Optionally, the inner side of the arc-shaped plate is a friction surface, and the outer side of the propulsion head is a friction surface.

[0011] Optionally, the array-type microneedle injection device further includes a release section, which is used to change the locking state of the locking section; the release section includes a corrugated expansion section and a corrugated extrusion section; the corrugated expansion section is connected to the corrugated extrusion section and is provided with pressure-conducting silicone oil inside; the corrugated expansion section is disposed between two arc-shaped plates; when the corrugated extrusion section is subjected to force, it is compressed, which drives the corrugated expansion section to expand.

[0012] Optionally, the corrugated extrusion section is disposed on both sides of the main body; a stepped groove is disposed on the main body corresponding to the position of the corrugated extrusion section; a stepped fixing block is disposed in the stepped groove, and a connecting hole connecting the corrugated expansion section and the corrugated extrusion section is disposed in the middle of the stepped fixing block.

[0013] Optionally, the corrugated extrusion section is disposed on the lower side of the main body; the side wall of the main body is provided with a connecting hole connecting the corrugated expansion section and the corrugated extrusion section; the main body is provided with a circular groove corresponding to the position of the corrugated extrusion section, one end of the corrugated extrusion section is located in the circular groove, and the other end abuts against the microneedle injection plate; the outward end of the corrugated extrusion section is flush with the outward side of the sealing ring.

[0014] Compared with the prior art, the present invention achieves the following technical effects:

[0015] 1. The injection module contains multiple sets of liquid-containing holes corresponding to the positions of the microneedles, so that the injection volume of each microneedle is the same, improving the uniformity of injection and enhancing the injection effect.

[0016] 2. The injection module in the array-type microneedle injection device is normally locked and only switches to the release state when in use, which can realize multiple injections at different positions and improve the convenience of use; before injection, the drive spring is in an energy storage state, which can complete the injection instantly when the injection module is released, improving the injection efficiency. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the structure of an array-type microneedle injection device provided in an embodiment of the present invention;

[0018] Figure 2 This is an exploded structural diagram of an array-type microneedle injection device provided in an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the internal structure of the drive cap in an array-type microneedle injection device provided in an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the internal structure of the main body of an array-type microneedle injection device provided in an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of the microneedle injection plate in the tension / compression sensor of the array-type microneedle injection device provided in an embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the liquid injection module in the tension / compression sensor of an array-type microneedle injection device provided in an embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of the locking part in an array-type microneedle injection device provided in an embodiment of the present invention;

[0024] Figure 8 This is a schematic diagram of the release section in an array-type microneedle injection device according to an embodiment of the present invention;

[0025] Figure 9 This is a schematic diagram of the operation of the release section in an array-type microneedle injection device according to an embodiment of the present invention;

[0026] Figure 10 This is a cross-sectional schematic diagram of an array-type microneedle injection device provided in an embodiment of the present invention from different directions;

[0027] Figure 11 This is a schematic diagram showing the state of an array-type microneedle injection device before and after liquid injection, according to an embodiment of the present invention.

[0028] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0030] like Figure 1-11 As shown, an embodiment of the present invention provides an array-type microneedle injection device, including: a drive cover 1, a main body 2, a microneedle injection plate 3, and an injection module 4;

[0031] The main body 2 is equipped with an injection module 4; the microneedle injection plate 3 is disposed on the lower side of the main body 2 and is sealed to the liquid outlet end of the injection module 4; the drive cover 1 is rotatably sleeved on the upper side of the main body 2, and a metering element 11 is slidably disposed inside the drive cover 1. The upper side of the metering element 11 is provided with a scale (for indicating the injection dose), and its lower side abuts against the top of the injection module 4 (for driving the injection module 4 to inject liquid).

[0032] The main body 2 is provided with a locking part 5, which is used to lock the liquid injection module 4. In the locked state, the liquid injection module 4 cannot inject liquid; when injecting liquid, the locking part 5 is in the released state.

[0033] Optional, such as Figure 3 As shown, the measuring component 11 includes a drive rod 111, a limiting ring 112, and a limiting strip 113; the limiting ring 112 is disposed on the outside of the drive rod 111, and the limiting strip 113 is disposed on both sides of the drive rod 111; a drive spring 12 is sleeved on the outside of the drive rod 111, and the drive spring 12 is disposed between the drive cover 1 and the limiting ring 112; the top of the drive cover 1 is provided with a limiting sliding hole 13 that matches the measuring component 11.

[0034] Optionally, the lower side of the drive rod 111 is hemispherical to reduce rotational friction.

[0035] Optionally, a fixing ring 14 is provided inside the drive cover 1. The fixing ring 14 is located below the limiting sliding hole 13 and is used to fix the drive spring 12.

[0036] Optionally, both the drive cover 1 and the main body 2 are cylindrical in shape; both the drive cover 1 and the main body 2 are made of transparent material.

[0037] Optionally, the inner side of the drive cover 1 and the outer side of the main body 2 are provided with threads.

[0038] Optional, such as Figure 5 As shown, the microneedle injection plate 3 includes a porous plate 31, microneedles 32 and a circular plate 33; the circular plate 33 is disposed on the periphery of the porous plate 31, and the microneedles 32 are arrayed on the porous plate 31; liquid holes are provided on the microneedles 32.

[0039] Optionally, the microneedle 32 has four bevels at its tip, and two liquid holes are symmetrically arranged on the bevels on both sides of the tip; the outer diameter of the microneedle 32 is 0.1-0.5 mm, and its length is 0.1-1.5 mm.

[0040] Optionally, the perforated plate 31 and the circular plate 33 are integrally formed.

[0041] Optionally, a fixing post 34 is provided on the circular plate 33; a fixing groove is provided on the main body 2 at the position corresponding to the fixing post 34 (the depth of the fixing groove is greater than the height of the fixing post 34); a magnetic block is provided in the fixing groove; and the fixing post 34 is made of magnetic material.

[0042] Optional, such as Figure 6 As shown, the liquid injection module 4 includes a propulsion part 41 and a receiving part 42; the propulsion part 41 includes a propulsion head 411 and a propulsion rod 412; the receiving part 42 is provided with a liquid receiving hole 421; the propulsion rod 412 is clearance-fitted with the liquid receiving hole 421, and the propulsion rod 412 is slidably disposed in the liquid receiving hole 421; multiple sets of the propulsion rod 412 and the liquid receiving hole 421 are provided, and their positions correspond to the microneedle 32; the propulsion rod 412, the liquid receiving hole 421 and the microneedle 32 are coaxially arranged.

[0043] Optionally, a sealing gasket is provided at the bottom of the push rod 412.

[0044] Optionally, the outer side of the receiving part 42 is provided with a thread or a set screw hole; the inner side of the main body 2 is provided with a matching thread or a set screw hole corresponding to the position of the receiving part 42; the receiving part 42 is fixedly disposed with the main body 2.

[0045] Optionally, the lower side of the receiving portion 42 is provided with an array of elastic sealing rings 422, and the lower side of each liquid receiving hole 421 is provided with a sealing ring 422.

[0046] Optional, such as Figure 7 As shown, the locking part 5 includes an arc-shaped plate 51, a guide rod 52, and a return spring 53; the guide rod 52 is disposed on the outward-facing arc surface of the arc-shaped plate 51; the return spring 52 is sleeved on the outside of the guide rod 52; the main body 2 is provided with a matching groove 21 at the position corresponding to the guide rod 52; the guide rod 52 is slidably disposed inside the groove 21; there are two arc-shaped plates 51 symmetrically disposed on both sides of the pushing part 41.

[0047] Optionally, the guide rods are configured as one or more sets, and the return springs are configured as one or more sets.

[0048] Optionally, a spring limiting hole is provided on the inner side of the main body 2 corresponding to the position of the reset spring 53, with part of the reset spring 53 disposed inside the spring limiting hole and part of it disposed outside the spring limiting hole.

[0049] Optionally, the inner side of the arc-shaped plate 51 is a friction surface, and the outer side of the push head 411 is a friction surface.

[0050] Optional, such as Figure 8As shown, the array-type microneedle injection device also includes a release section 6, which is used to change the locking state of the locking section 5; the release section 6 includes a corrugated expansion section 61 and a corrugated compression section 62; the corrugated expansion section 61 is connected to the corrugated compression section 62 and is provided with pressure-conducting silicone oil inside; the corrugated expansion section 61 is disposed between two arc-shaped plates 51; when the corrugated compression section 62 is subjected to force, it is compressed, which drives the corrugated expansion section 61 to expand.

[0051] Optionally, both the corrugated expansion part 61 and the corrugated extrusion part 62 are made of elastic and stretchable material.

[0052] Optionally, the release part 6 is implemented in the first embodiment: the corrugated extrusion part 62 is disposed on both sides of the main body 2; the main body 2 is provided with a stepped groove 22 corresponding to the position of the corrugated extrusion part 62; a stepped fixing block 63 is disposed in the stepped groove 22, and a connecting hole is provided in the middle of the stepped fixing block 63 to connect the corrugated expansion part 61 and the corrugated extrusion part 62. The release part 6 is activated by pressing the corrugated extrusion part 62 on both sides by hand, which causes the corrugated expansion part 61 to move the arc plate 51 outward, and the locking part 5 is in the released state.

[0053] Optionally, the release part 6 is implemented in a second manner: the corrugated extrusion part 62 is disposed on the lower side of the main body 2 (not shown); the side wall of the main body 2 has a connecting hole connecting the corrugated expansion part 61 and the corrugated extrusion part 62; the main body 2 has a circular groove corresponding to the position of the corrugated extrusion part 62, one end of the corrugated extrusion part 62 is located in the circular groove, and the other end abuts against the microneedle injection plate 3; the outward-facing end of the corrugated extrusion part 62 is flush with the outward-facing side of the sealing ring 422. The release part 6 is activated by placing the array-type microneedle injection device against the injection position and applying a specified pressing pressure. At this time, the microneedle injection plate 3 transmits the pressure to the corrugated extrusion part 62, the corrugated expansion part 61 drives the arc-shaped plate 51 to move outward, and the locking part 5 is in a released state. The corrugated extrusion part 62 is flush with the sealing ring 422, enhancing the sealing performance while pressing.

[0054] Working principle of array-type microneedle injection device:

[0055] (1) Install the microneedle injection plate 3 on the lower side of the main body 2:

[0056] (2) In the initial state, the locking part 5 is in the locked state (at this time, the return spring 53 is in the unfolded state, which drives the arc plate 51 to squeeze the push head 411);

[0057] (3) Set the injection volume: Rotate the drive cover 1 / body 2, the metering component 11 extends out of the drive cover 1 to display the scale (at this time, the drive cover 1 moves towards the injection module 4, the drive spring 12 is compressed, and the drive rod 111 remains stationary).

[0058] (4) Press the array-type microneedle injection device against the injection site and apply a certain pressure;

[0059] (5) Apply a force of a specified intensity to the release part 6, the locking part 5 is in the released state, the metering part 11 pushes the propulsion part 41 to move downward, and the liquid injection is completed (at this time, the corrugated extrusion part 62 is compressed by force → the corrugated expansion part 61 expands → the arc plate 51 opens (the return spring 53 is compressed) → the metering part 11 moves downward (the drive spring 12 is reset) → the propulsion part 41 moves downward).

[0060] (6) Release the release part 6, and the locking part 5 returns to the locked state (at this time, the return spring 53 unfolds → the corrugated expansion part 61 is compressed → the corrugated compression part 62 is reset).

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. An array-type microneedle injection device, comprising: The invention comprises a drive cap, a main body, a microneedle injection plate, and a liquid injection module; characterized in that the liquid injection module is disposed inside the main body; the microneedle injection plate is disposed on the lower side of the main body and is sealed and connected to the liquid outlet end of the liquid injection module; the drive cap is rotatably sleeved on the upper side of the main body; a metering element is slidably disposed inside the drive cap, the upper side of the metering element is provided with a scale, and its lower side abuts against the top of the liquid injection module for driving the liquid injection module to inject liquid; The main body is provided with a locking part, which is used to lock the liquid injection module. In the locked state, the liquid injection module cannot inject liquid; when injecting liquid, the locking part is in the released state.

2. The array-type microneedle injection device as described in claim 1, characterized in that, in, The measuring component includes a drive rod, a limiting ring, and a limiting strip; the limiting ring is disposed on the outside of the drive rod, and the limiting strip is disposed on both sides of the drive rod; a drive spring is sleeved on the outside of the drive rod, and the drive spring is disposed between the drive cover and the limiting ring; the top of the drive cover is provided with a limiting sliding hole that matches the measuring component.

3. The array-type microneedle injection device as described in claim 2, characterized in that, in, The microneedle injection plate includes a porous plate, microneedles, and a circular plate; the circular plate is disposed around the porous plate, and the microneedle array is distributed on the porous plate; liquid holes are provided on the microneedles.

4. The array-type microneedle injection device as described in claim 3, characterized in that, in, The liquid injection module includes a propulsion section and a receiving section; the propulsion section includes a propulsion head and a propulsion rod; the receiving section has a liquid receiving hole inside; the propulsion rod is clearance-fitted with the liquid receiving hole, and the propulsion rod is slidably disposed in the liquid receiving hole; multiple sets of the propulsion rod and the liquid receiving hole are provided, and their positions correspond to the microneedle; the propulsion rod, the liquid receiving hole, and the microneedle are coaxially arranged.

5. The array-type microneedle injection device as described in claim 4, characterized in that, in, An array of elastic sealing rings is provided on the lower side of the receiving part, and a sealing ring is provided on the lower side of each liquid receiving hole.

6. The array-type microneedle injection device as described in claim 5, characterized in that, in, The locking part includes an arc-shaped plate, a guide rod, and a return spring; the guide rod is disposed on the outward-facing arc surface of the arc-shaped plate; the return spring is sleeved on the outside of the guide rod; the main body is provided with a sliding groove of matching size corresponding to the position of the guide rod; the guide rod is slidably disposed inside the sliding groove; there are two arc-shaped plates, which are symmetrically disposed on both sides of the propulsion part.

7. The array-type microneedle injection device as described in claim 6, characterized in that, in, The inner side of the arc-shaped plate is a friction surface, and the outer side of the propulsion head is a friction surface.

8. The array-type microneedle injection device as described in claim 7, characterized in that, in, The array-type microneedle injection device also includes a release section, which is used to change the locking state of the locking section; the release section includes a corrugated expansion section and a corrugated extrusion section; the corrugated expansion section and the corrugated extrusion section are connected and are provided with pressure-conducting silicone oil inside; the corrugated expansion section is disposed between two arc-shaped plates; when the corrugated extrusion section is subjected to force, it is compressed, which drives the corrugated expansion section to expand.

9. The array-type microneedle injection device as described in claim 8, characterized in that, in, The corrugated extrusion section is disposed on both sides of the main body; a stepped sink groove is disposed on the main body corresponding to the position of the corrugated extrusion section; a stepped fixing block is disposed in the stepped sink groove, and a connecting hole connecting the corrugated expansion section and the corrugated extrusion section is disposed in the middle of the stepped fixing block.

10. The array-type microneedle injection device as described in claim 8, characterized in that, in, The corrugated extrusion section is disposed on the lower side of the main body; the side wall of the main body is provided with a connecting hole connecting the corrugated expansion section and the corrugated extrusion section; the main body is provided with a circular groove corresponding to the position of the corrugated extrusion section, one end of the corrugated extrusion section is located in the circular groove, and the other end abuts against the microneedle injection plate; the outward end of the corrugated extrusion section is flush with the outward side of the sealing ring.

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