Painless hydrotherapy needle injection device with front end cooling function

Abstract

The invention relates to the technical field of medical beauty drug delivery equipment, and discloses a painless hydro-optical needle injection device with a front end cooling function. The microneedle injection assembly is located at the front end of the handheld main body, the microneedle injection assembly comprises a shell, a pressed surface opening is formed in the front end of the shell, a cold compress target plate and a cooling assembly located on the back face of the cold compress target plate are arranged in the shell, the cold compress target plate is arranged close to the pressed surface opening, and the cooling assembly is located on the back face of the cold compress target plate. The negative-pressure gas collecting chamber is located between the cold compress target plate and the cooling assembly, negative-pressure flow equalizing holes are distributed in the cold compress target plate, and the hole diameters of the negative-pressure flow equalizing holes and / or the distribution density of the negative-pressure flow equalizing holes are distributed in a gradient increasing mode from the center of the cold compress target plate to the peripheral edge of the cold compress target plate.

Description

Technical Field

[0001] This invention relates to the field of medical aesthetic drug delivery equipment technology, and more specifically, to a painless water-light injection device with a front-end cooling function. Background Technology

[0002] Mesotherapy (hyaluronic acid injection) is a minimally invasive drug delivery method widely used in clinical dermatology and medical aesthetics. Its basic working principle involves using a negative pressure chamber at the front of the injection device to lift the patient's facial skin, bringing it close to the injection end. Then, an internal mechanical transmission mechanism drives the microneedle array components to pierce the dermis, completing the quantitative injection of hyaluronic acid and other medications.

[0003] Existing technologies, such as Chinese patent document CN114984376A, disclose a hyaluronic acid injection structure, which details the basic architecture of using a vacuum negative pressure chamber to lift the skin and coordinating with a mechanical pusher to drive the microneedle tip for injection. However, in clinical applications, it has been found that due to the lack of an effective local cold compress mechanism, severe pain and postoperative redness and swelling are easily generated during microneedle insertion; moreover, the skin on the pressure surface tends to bulge towards the center of the cavity under negative pressure, resulting in inconsistent insertion depth of the microneedle array and affecting the accuracy of drug delivery. Summary of the Invention

[0004] The purpose of this invention is to provide a painless hyaluronic acid injection device with a front-end cooling function, which aims to solve the problems of severe pain caused by the lack of front-end cooling in the existing technology, and the uneven needle insertion depth caused by the central bulge in the negative pressure cavity due to the curvature of the face.

[0005] To achieve the above objectives, the present invention provides a painless mesotherapy injection device with a front-end cooling function, comprising: Handheld main body; A microneedle injection assembly is located at the front end of the handheld main body. The microneedle injection assembly includes a housing with a pressure-receiving surface opening at the front end. A cooling target plate and a cooling component located on the back of the cooling target plate are disposed inside the housing. The cooling target plate is positioned close to the pressure-receiving surface opening. A negative pressure gas collection chamber is located between the cooling target plate and the cooling component. Negative pressure equalization holes are distributed on the cooling target plate. The diameter of the negative pressure equalization holes and / or the distribution density of the negative pressure equalization holes increase in a gradient from the center of the cooling target plate to the outer edge.

[0006] Furthermore, the cooling component includes: The annular cooling pad and the thermally conductive backplate are provided. The cold end of the annular cooling pad is attached to the thermally conductive backplate by thermally conductive structural adhesive. The end of the thermally conductive backplate away from the annular cooling pad is connected to the back of the cooling target plate by a sealing frame. The negative pressure gas collection chamber is located between the cooling target plate and the thermally conductive backplate. The microneedle array assembly is slidably located at the central opening of the annular cooling pad and penetrates the thermally conductive backplate. The cooling target plate has through-holes for microneedle guide holes that slide and cooperate with each microneedle of the microneedle array assembly.

[0007] Furthermore, the front end of the handheld main body is integrally formed with a syringe fixing front seat, the front end of the syringe abuts against the syringe fixing front seat, the open end of the housing away from the pressure surface is screwed onto the syringe fixing front seat, and the syringe outlet head is connected to the microneedle array assembly inside the housing.

[0008] Furthermore, the housing is provided with a mounting ring seat, a return spring is sleeved on the microneedle array assembly, one end of the return spring abuts against the mounting ring seat, and the other end of the return spring abuts against the sliding ring seat, and the sliding ring seat is fixedly mounted on the microneedle array assembly.

[0009] Furthermore, the housing has an installation screw hole at the open end away from the pressure surface, and the syringe fixing front seat has an external thread that is screwed into the installation screw hole. The syringe fixing front seat extends into the housing from the installation screw hole and abuts against the microneedle array assembly.

[0010] Furthermore, the housing consists of a detachably connected front housing and a rear housing, the pressure-bearing surface opening is located on the front housing, the cold compress target plate and the cooling assembly are located inside the front housing, and the microneedle array assembly is located inside the rear housing.

[0011] Furthermore, the rear housing is provided with an outer annular mounting platform near the front housing end, and the centrifugal water-throwing ring is rotatably mounted on the outer annular mounting platform. An inner annular mounting port is formed on the inner wall of the front housing away from the pressure-bearing surface opening end. After the front housing and the rear housing are connected, the inner annular mounting port and the outer annular mounting platform form a negative pressure suction chamber in which the centrifugal water-throwing ring is located. Multiple suction pipes are located in the front housing and are connected between the negative pressure gas collection chamber and the negative pressure suction chamber. The front housing is provided with a condensate collection tank that communicates with the negative pressure suction chamber.

[0012] Furthermore, the rear housing is provided with a main negative pressure port that communicates with the negative pressure extraction chamber. A miniature vacuum pump is installed at the rear end of the handheld main body and connected to the main negative pressure port through a pipeline. Multiple wind-receiving blades that cross the main airflow are fixedly connected radially on the outer circumference of the centrifugal water-throwing ring.

[0013] Furthermore, the housing is provided with heat dissipation holes for the hot end of the annular cooling chip to dissipate heat.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses a painless water light injection device with front-end cooling function. Through the gradient configuration of negative pressure equalization holes, the device utilizes the large adsorption force in the edge area to generate outward tension, effectively suppressing protrusion and improving the uniformity of needle insertion depth.

[0015] The present invention discloses a painless water light injection device with front-end cooling function, which uses negative pressure airflow to drive the centrifugal water-throwing ring to rotate at high speed. The centrifugal force traps the condensed water in the condensed water collection tank, reducing the possibility of liquid entering the vacuum pump, thereby reducing pump body liquid hammer damage.

[0016] The present invention discloses a painless water light injection device with front-end cooling function. By utilizing the threaded engagement between the housing and the fixed front seat, the position of the cooling target plate relative to the microneedle array is finely adjusted through the spiral stroke, ensuring the controllability of injection depth in areas with different skin thicknesses. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is an external view of a painless water-light injection device with front-end cooling function according to the present invention. Figure 2 This is a cross-sectional view of a painless mesotherapy injection device with front-end cooling function according to the present invention. Figure 3 for Figure 2 A magnified view of a portion of the microneedle injection component; Figure 4 This is a split view of the microneedle injection component in a painless mesotherapy injection device with front-end cooling function according to the present invention. Figure 5 This is a schematic diagram of the microneedle injection component in a painless mesotherapy injection device with front-end cooling function according to the present invention.

[0019] In the diagram: 10. Handheld main body; 11. Microneedle injection assembly; 12. Housing; 13. Pressure surface opening; 14. Cooling target plate; 15. Cooling assembly; 16. Negative pressure gas collection chamber; 17. Annular cooling plate; 18. Heat-conducting back plate; 19. Microneedle array assembly; 20. Syringe fixing front seat; 21. Syringe; 22. Mounting ring seat; 23. Return spring; 24. Sliding ring seat; 25. Front housing; 26. Rear housing; 27. Mounting screw; 28. Centrifugal water-spinning ring; 29. ​​Negative pressure suction chamber; 30. Suction pipeline; 31. Condensate collection tank; 32. Main negative pressure port; 33. Wind-receiving blade. Detailed Implementation

[0020] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0021] Please see Figures 1 to 5 This invention provides a painless mesotherapy injection device with a front-end cooling function, comprising: Handheld main body 10; A microneedle injection assembly 11 is located at the front end of the handheld main body 10. The microneedle injection assembly 11 includes a housing 12. The front end of the housing 12 is provided with a pressure-receiving surface opening 13. A cooling target plate 14 and a cooling component 15 located on the back of the cooling target plate 14 are provided inside the housing 12. The cooling target plate 14 is arranged close to the pressure-receiving surface opening 13. A negative pressure gas collection chamber 16 is located between the cooling target plate 14 and the cooling component 15. Negative pressure equalization holes are distributed on the cooling target plate 14. The diameter of the negative pressure equalization holes increases gradually from the center of the cooling target plate 14 to the outer edge.

[0022] The working principle and beneficial effects of the above technical solution are as follows: This invention provides a painless mesotherapy injection device with a front-end cooling function. After negative pressure is activated, the air in the negative pressure collection chamber 16 is evacuated, and the flexible skin is drawn into the shell 12 through the pressure-bearing surface opening 13 under external atmospheric pressure, with the dermis layer suspended and isolated from the periosteum. The aperture of the periphery of the cooling target plate 14 is larger than that of the central area. After negative pressure is activated, the peripheral area generates a strong vertical upward pressure due to its larger force-bearing area. This adsorption force is converted into an outward lateral traction force, pulling the skin outward and making the skin adhere to the reference surface of the cooling target plate. The cooling component 15 achieves large-area cold compress analgesia of the cooling target plate 14.

[0023] As an optional embodiment of the present invention, the negative pressure equalization holes can also be configured such that their distribution density increases in a gradient from the center of the cold compress target plate 14 to the outer edge. The outer region has small pore size but high distribution density. During the transient phase of suction, when the gas flows through the high-density micropore region, resistance is generated due to the sudden contraction of the cross-sectional area. According to Bernoulli's principle, the flow velocity accelerates dramatically, forming a local low pressure, thereby improving the sensitivity of capturing the skin edge.

[0024] In one embodiment, the cooling component 15 includes: An annular cooling pad 17 and a heat-conducting backplate 18 are provided. The cold end of the annular cooling pad 17 is attached to the heat-conducting backplate 18 by a heat-conducting structural adhesive. The end of the heat-conducting backplate 18 away from the annular cooling pad 17 is connected to the back of the cold compress target plate 14 by a sealing frame. The negative pressure gas collection chamber 16 is located between the cold compress target plate 14 and the heat-conducting backplate 18. The microneedle array assembly 19 is slidably located at the central opening of the annular cooling pad 17 and penetrates the heat-conducting backplate 18. The cold compress target plate 14 is provided with microneedle guide holes that slide and cooperate with each microneedle of the microneedle array assembly 19.

[0025] The working principle and beneficial effects of the above technical solution are as follows: The annular cooling pad 17 operates, its cold end transferring the cold source to the cooling target plate 14 via the heat-conducting backplate 18. The cooling target plate 14 serves as a skin contact panel, thereby achieving large-area cold compress analgesia. The end of the heat-conducting backplate 18 furthest from the annular cooling pad 17 is connected to the back of the cooling target plate 14 via a sealing frame, thus forming a thin negative pressure air collection chamber 16. The cold end of the annular cooling pad 17 can completely adhere to the heat-conducting backplate 18, maximizing heat transfer efficiency. Meanwhile, the suction pipe 30 achieves lateral suction, allowing air to flow in all directions within this flat space, using the lateral airflow to draw away condensate from the heat-conducting backplate 18.

[0026] In one embodiment, the front end of the handheld main body 10 is integrally formed with a syringe fixing front seat 20, the front end of the syringe 21 abuts against the syringe fixing front seat 20, the end of the housing 12 away from the pressure surface opening 13 is screwed onto the syringe fixing front seat 20, and the liquid outlet head of the syringe 21 is connected to the microneedle array assembly 19 inside the housing 12.

[0027] The working principle and beneficial effects of the above technical solution are as follows: The housing 12 can be screwed onto the syringe fixing front seat 20 for easy disassembly and assembly. After the syringe 21 is installed on the handheld body 10, its front end extends into the syringe fixing front seat 20, which not only fixes the syringe 21 but also connects the syringe 21 liquid outlet head with the microneedle array assembly 19.

[0028] In one embodiment, the housing 12 is provided with a mounting ring seat 22, and a reset spring 23 is sleeved on the microneedle array assembly 19. One end of the reset spring 23 abuts against the mounting ring seat 22, and the other end of the reset spring 23 abuts against the sliding ring seat 24. The sliding ring seat 24 is fixedly mounted on the microneedle array assembly 19.

[0029] The housing 12 has a mounting screw 27 at the end away from the pressure surface opening 13. The syringe fixing front seat 20 has an external thread that is screwed into the mounting screw 27. The syringe fixing front seat 20 extends into the housing 12 from the mounting screw 27 and abuts against the microneedle array assembly 19.

[0030] The working principle and beneficial effects of the above technical solution are as follows: The housing 12 is screwed onto the syringe fixing front seat 20 via a mounting screw 27. When adjusting the insertion depth of the microneedle array assembly 19, the housing 12 is manually rotated using the screw connection between the housing 12 and the syringe fixing front seat 20 to control the depth to which the syringe fixing front seat 20 extends into the housing 12 from the mounting screw 27. That is, when the housing 12 is rotated clockwise, the insertion depth of the syringe fixing front seat 20 into the housing 12 is greater; conversely, when the housing 12 is rotated counterclockwise, the insertion depth of the syringe fixing front seat 20 into the housing 12 is smaller. By rotating the housing 12, the operator changes the insertion depth of the fixing front seat 20 into the housing 12 through the thread lift. This displacement changes the relative distance between the microneedle array assembly 19 and the reference plane of the cold compress target plate 14, achieving precise adjustment of the insertion depth. This mechanical fine-tuning is not only structurally stable but also adaptable to the skin characteristics of different areas such as the periorbital region and forehead. Since the insertion depth of the microneedle array assembly 19 can be adjusted within millimeters, the rotation angle of the housing 12 will not be too large.

[0031] In one embodiment, the housing 12 is composed of a detachably connected front housing 25 and a rear housing 26, the pressure-bearing surface opening 13 is located on the front housing 25, the cold compress target plate 14 and the cooling component 15 are located inside the front housing 25, and the microneedle array component 19 is located inside the rear housing 26.

[0032] The beneficial effects of the above technical solution are as follows: The housing 12 is split into a front housing 25 and a rear housing 26 to facilitate the maintenance of the cold-applied target plate 14 and the cooling assembly 15 inside the housing 12.

[0033] In one embodiment, the rear housing 26 is provided with an outer annular mounting platform near the front housing 25, and the centrifugal water-throwing ring 28 is rotatably mounted on the outer annular mounting platform. The inner wall of the front housing 25 away from the opening 13 of the pressure surface is formed with an inner annular mounting port. After the front housing 25 and the rear housing 26 are connected, the inner annular mounting port and the outer annular mounting platform form a negative pressure suction chamber 29 in which the centrifugal water-throwing ring 28 is located. Multiple suction pipes 30 are located in the front housing 25 and are connected between the negative pressure gas collection chamber 16 and the negative pressure suction chamber 29. The front housing 25 is provided with a condensate collection tank 31 that communicates with the negative pressure suction chamber 29.

[0034] The rear housing 26 is provided with a main negative pressure port 32 that communicates with the negative pressure extraction chamber 29. A micro vacuum pump is installed at the rear end of the handheld main body 10 and is connected to the main negative pressure port 32 through a pipeline. Multiple wind-receiving blades 33 that cross the main airflow are fixedly connected radially on the outer circumference of the centrifugal water-throwing ring 28.

[0035] The working principle and beneficial effects of the above technical solution are as follows: After the miniature vacuum pump connected to the main negative pressure port 32 is started, the air in the negative pressure collection chamber 16 is evacuated, and the skin is flattened and placed against the cooling target plate 14. The cooling component 15 includes annular cooling fins 17. When condensation is generated during cooling, the negative pressure airflow enters the negative pressure extraction chamber 29 through the extraction pipe 30. The airflow impacts the wind-receiving blades 33 on the centrifugal water-throwing ring 28, driving it to rotate at high speed. The centrifugal force generated by the rotation throws the condensate droplets radially into the condensate collection tank 31. This structure achieves physical separation of the gas and liquid phases, ensuring that the gas entering the vacuum pump remains dry and significantly reducing the risk of bacterial growth inside the equipment.

[0036] In one embodiment, the housing 12 is provided with heat dissipation holes for the hot end of the annular cooling chip 17 to dissipate heat.

[0037] The beneficial effects of the above technical solution are as follows: The heat dissipation holes facilitate heat dissipation from the hot end of the annular cooling chip 17, thereby preventing heat from accumulating inside the housing 12.

[0038] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A painless mesotherapy injection device with front-end cooling function, characterized in that, include: Handheld main body (10); Microneedle injection assembly (11) is located at the front end of the handheld main body (10). The microneedle injection assembly (11) includes a housing (12). The front end of the housing (12) is provided with a pressure-receiving surface opening (13). The housing (12) is provided with a cold compress target plate (14) and a cooling component (15) located on the back of the cold compress target plate (14). The cold compress target plate (14) is located close to the pressure-receiving surface opening (13). A negative pressure gas collection chamber (16) is located between the cold compress target plate (14) and the cooling component (15). The cold compress target plate (14) is provided with negative pressure equalization holes. The aperture of the negative pressure equalization holes and / or the distribution density of the negative pressure equalization holes are distributed in a gradient increasing manner from the center of the cold compress target plate (14) to the outer edge.

2. A painless mesotherapy injection device with front-end cooling function according to claim 1, characterized in that, The cooling component (15) includes: The annular cooling plate (17) and the heat-conducting back plate (18) are provided. The cold end of the annular cooling plate (17) is attached to the heat-conducting back plate (18) by a heat-conducting structural adhesive. The end of the heat-conducting back plate (18) away from the annular cooling plate (17) is connected to the back of the cold compress target plate (14) by a sealing frame. The negative pressure gas collection chamber (16) is located between the cold compress target plate (14) and the heat-conducting back plate (18). The microneedle array assembly (19) is slidably located in the center opening of the annular cooling plate (17) and penetrates the heat-conducting back plate (18). The cold compress target plate (14) is provided with microneedle guide holes that slide and cooperate with each microneedle of the microneedle array assembly (19).

3. A painless mesotherapy injection device with front-end cooling function according to claim 1, characterized in that, The front end of the handheld main body (10) is integrally formed with a syringe fixing front seat (20). The front end of the syringe (21) abuts against the syringe fixing front seat (20). The end of the housing (12) away from the pressure surface opening (13) is screwed onto the syringe fixing front seat (20). The liquid outlet of the syringe (21) is connected to the microneedle array assembly (19) inside the housing (12).

4. A painless mesotherapy injection device with front-end cooling function according to claim 3, characterized in that, The housing (12) is provided with a mounting ring seat (22), and a reset spring (23) is sleeved on the microneedle array assembly (19). One end of the reset spring (23) abuts against the mounting ring seat (22), and the other end of the reset spring (23) abuts against the sliding ring seat (24). The sliding ring seat (24) is fixedly installed on the microneedle array assembly (19).

5. A painless mesotherapy injection device with front-end cooling function according to claim 3, characterized in that, The housing (12) has an installation screw hole (27) at the end away from the pressure surface opening (13). The syringe fixing front seat (20) has an external thread that is screwed into the installation screw hole (27). The syringe fixing front seat (20) extends into the housing (12) from the installation screw hole (27) and abuts against the microneedle array assembly (19).

6. A painless mesotherapy injection device with front-end cooling function according to claim 2, characterized in that, The housing (12) is composed of a detachably connected front housing (25) and a rear housing (26). The pressure-bearing surface opening (13) is located on the front housing (25). The cold compress target plate (14) and the cooling component (15) are located inside the front housing (25). The microneedle array component (19) is located inside the rear housing (26).

7. A painless mesotherapy injection device with front-end cooling function according to claim 6, characterized in that, The rear housing (26) is provided with an outer annular mounting platform near the front housing (25). The centrifugal water-throwing ring (28) is rotatably mounted on the outer annular mounting platform. The inner wall of the front housing (25) away from the opening (13) of the pressure surface is formed with an inner annular mounting port. After the front housing (25) and the rear housing (26) are connected, the inner annular mounting port and the outer annular mounting platform form a negative pressure suction chamber (29) in which the centrifugal water-throwing ring (28) is located. Multiple suction pipes (30) are located in the front housing (25) and are connected between the negative pressure gas collection chamber (16) and the negative pressure suction chamber (29). The front housing (25) is provided with a condensate collection tank (31) that is connected to the negative pressure suction chamber (29).

8. A painless mesotherapy injection device with front-end cooling function according to claim 7, characterized in that, The rear housing (26) is provided with a main negative pressure port (32) that communicates with the negative pressure extraction chamber (29). A micro vacuum pump is installed at the rear end of the handheld main body (10) and connected to the main negative pressure port (32) through a pipeline. Multiple wind-receiving blades (33) that cross the main airflow are fixedly connected radially on the outer circumference of the centrifugal water-throwing ring (28).

9. A painless mesotherapy injection device with front-end cooling function according to claim 2, characterized in that, The housing (12) is provided with heat dissipation holes for the hot end of the annular cooling chip (17) to dissipate heat.

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