Injection needles that leave no drug residue on the skin

Abstract

This utility model relates to an injection needle that leaves no drug residue on the skin, belonging to the field of injection needle technology. It includes a guide sleeve, which is detachably connected to a needle tube connector via a fastener. An inner cavity is formed inside the guide sleeve, and a negative pressure interface is provided on the side wall of the guide sleeve. A negative pressure channel is provided inside the guide sleeve, connecting the inner cavity to the negative pressure interface. An exhaust component within the negative pressure channel allows gas to pass through while blocking liquid. This utility model connects to a negative pressure source via the negative pressure interface, continuously drawing air into the inner cavity of the guide sleeve to maintain a stable air pressure. Drug overflowing from the skin can reliably enter the inner cavity, eliminating concerns about delayed gas discharge and increased air pressure within the guide sleeve, thus preventing drug residue on the skin and ensuring the continuity of the injection operation. The exhaust component within the negative pressure channel prevents drug from entering the channel, allowing only gas to escape, preventing drug from being drawn into the device and causing corrosion or malfunction, thereby extending the device's lifespan.

Description

Technical Field

[0001] This utility model relates to an injection needle that leaves no drug residue on the skin, belonging to the field of injection needle technology. Background Technology

[0002] A hyaluronic acid injection device is a cosmetic instrument that injects nutrients such as hyaluronic acid, collagen, and vitamins into the dermis layer of the skin through physical or electronic means. In clinical injection procedures, the medication needs to be injected into the dermis layer to achieve therapeutic or cosmetic effects. If the needle does not penetrate the skin deeply enough, some medication will leak out during the injection process, and the residual medication on the skin will affect the hygiene and continuity of subsequent injections.

[0003] The existing injection needle's cannula extends from the needle post at the bottom of the guide sleeve. The needle post, when pressed against the skin surface, forms a relatively sealed state. Theoretically, any overflowing medication should enter the inner cavity of the guide sleeve through the gap between the steel needle and the needle post, simultaneously expelling the gas inside the cavity. However, due to the varying sizes of the gaps between the plastic parts inside the injection needle, if the gas is not expelled in time, the liquid may be unable to enter the inner cavity due to the high internal pressure, ultimately resulting in medication residue on the skin, affecting injection efficiency and the user experience. Utility Model Content

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide an injection needle that leaves no drug residue on the skin, and to improve the stability of the drug entering the inner cavity by setting a negative pressure suction structure, while avoiding damage to the equipment by the drug and ensuring the continuity of the injection operation.

[0005] The injection needle with no drug residue on the skin according to this utility model includes a guide sleeve, which is detachably connected to the needle tube connector by a fastener. The guide sleeve has an inner cavity for accommodating drug that overflows from the skin. The side wall of the guide sleeve is provided with a negative pressure interface for connecting a negative pressure source. The guide sleeve has a negative pressure channel connecting the inner cavity and the negative pressure interface. The negative pressure channel is provided with an exhaust component that allows gas to pass through and blocks liquid from passing through.

[0006] Furthermore, the needle tube connector is equipped with several needle tubes, with the bottom of the needle tubes passing through a guide sleeve.

[0007] Furthermore, the needle connector is provided with a liquid medicine chamber that communicates with the needle tube, and the top of the liquid medicine chamber is adapted to connect with the liquid medicine outlet of the water light instrument to realize the delivery of liquid medicine.

[0008] Furthermore, a protective cap is detachably installed at the bottom of the guide sleeve, which protects the syringe from contamination or damage when not in use.

[0009] Furthermore, the needle connector is threadedly sealed to the mounting fastener, and the mounting fastener is sealed and snapped into the guide sleeve.

[0010] Furthermore, the exhaust component is a microporous waterproof and breathable plug, which can stably achieve the effect of being breathable but not liquid-permeable, preventing the liquid medicine from entering the negative pressure channel.

[0011] The advantages of this utility model compared with the prior art are:

[0012] 1. This utility model connects to a negative pressure source through a negative pressure interface to continuously draw air into the inner cavity of the guide sleeve, keeping the air pressure in the inner cavity stable. The medicine overflowing from the skin can stably enter the inner cavity without worrying about the air pressure in the inner cavity rising due to the gas not being discharged in time, resulting in medicine residue on the skin, thus ensuring the continuity of the injection operation.

[0013] 2. The exhaust component in the negative pressure channel can prevent the liquid medicine from entering the negative pressure channel and only allow gas to be discharged, thus avoiding the liquid medicine being sucked into the water light instrument and causing equipment corrosion or malfunction, and extending the service life of the equipment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a cross-sectional view of the present invention.

[0016] In the diagram: 1. Needle connector; 11. Medication chamber; 2. Mounting fastener; 3. Guide sleeve; 31. Inner cavity; 32. Negative pressure interface; 33. Negative pressure channel; 34. Exhaust assembly; 4. Protective cap; 5. Needle. Detailed Implementation

[0017] The present invention will be further described below with reference to specific embodiments.

[0018] like Figure 1-2 As shown, this embodiment is achieved through the following technical solution: it includes a guide sleeve 3, which is detachably connected to the needle tube connector 1 via a fastener 2. The guide sleeve 3 forms an inner cavity 31 for accommodating the medicine overflowing from the skin. The side wall of the guide sleeve 3 is provided with a negative pressure interface 32 for connecting a negative pressure source. The guide sleeve 3 is provided with a negative pressure channel 33 that connects the inner cavity 31 and the negative pressure interface 32. The negative pressure channel 33 is provided with an exhaust assembly 34 that allows gas to pass through and blocks liquid from passing through.

[0019] In this embodiment, the needle tube connector 1 is equipped with several needle tubes 5, with the bottom of each needle tube 5 penetrating the guide sleeve 3. The needle tube connector 1 has a liquid medicine chamber 11 communicating with the needle tubes 5. The top of the liquid medicine chamber 11 is adapted to connect with the liquid medicine outlet of the water-light instrument to achieve liquid medicine delivery. The protective cap 4 is detachably installed at the bottom of the guide sleeve 3, protecting the needle tubes 5 from contamination or damage when not in use. The needle tube connector 1 is threadedly sealed to the mounting fastener 2, and the mounting fastener 2 is securely engaged with the guide sleeve 3. The exhaust assembly 34 is a microporous waterproof and breathable plug made of PTFE material, which can stably achieve the effect of air permeability without liquid permeability, preventing liquid medicine from entering the negative pressure channel 33.

[0020] The working process of this utility model is as follows:

[0021] When using, remove the protective cap 4, connect the top of the needle connector 1 to the liquid outlet of the water light instrument, and then connect the negative pressure interface 32 to the negative pressure source of the water light instrument.

[0022] Under negative pressure, the bottom of the guide sleeve 3 is pressed tightly against the skin, the needle 5 is inserted into the skin, the medicine flows through the medicine cavity 11, and is injected into the dermis through the needle 5;

[0023] The medicine overflows from the skin and enters the inner cavity 31. At the same time, the air in the inner cavity 31 passes through the exhaust assembly 34, flows through the negative pressure channel 33, and is discharged through the negative pressure interface 32, ensuring the air pressure in the inner cavity 31 is stable, thereby improving the stability of the medicine entering the inner cavity.

[0024] All spilled medication is drawn into the inner cavity 31, effectively preventing medication residue from remaining on the skin and affecting the next injection. The exhaust assembly 34 prevents medication from being drawn into the water light device during injection, thus preventing damage to the equipment.

Claims

1. A needle for injection without skin residue of a drug solution, characterized in that, Includes a guide sleeve (3), which is detachably connected to the needle connector (1) via a fastener (2). The guide sleeve (3) forms an inner cavity (31) for accommodating the drug solution that overflows from the skin. The side wall of the guide sleeve (3) is provided with a negative pressure interface (32) for connecting a negative pressure source. The guide sleeve (3) is provided with a negative pressure channel (33) that connects the inner cavity (31) and the negative pressure interface (32). The negative pressure channel (33) is provided with an exhaust assembly (34) that allows gas to pass through and blocks liquid from passing through.

2. The injection needle without drug solution skin residue according to claim 1, wherein The needle tube connector (1) is equipped with several needle tubes (5), and the bottom of the needle tubes (5) passes through the guide sleeve (3).

3. The injection needle without skin residue of liquid medicine according to claim 2, characterized in that, The needle tube connector (1) is provided with a liquid medicine chamber (11) that communicates with the needle tube (5). The top of the liquid medicine chamber (11) is used to be adapted and connected to the liquid medicine outlet of the water light instrument.

4. The injection needle without skin residue of liquid medicine according to claim 2, characterized in that, The bottom of the guide sleeve (3) is detachably fitted with a protective cap (4).

5. The injection needle without skin residue of liquid medicine according to claim 1, characterized by, The needle tube connector (1) is threadedly sealed to the mounting fastener (2), and the mounting fastener (2) is sealed and snapped into the guide sleeve (3).

6. The injection needle without drug solution skin residue according to claim 1, wherein The exhaust assembly (34) is a microporous waterproof and breathable plug.

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