A sterile injection needle

Abstract

The utility model discloses a sterile injection needle, including liquid guide connector, knob cover, needle holder, needle tube and main body shell, the up and down position between liquid guide connector and main body shell is adjusted through the rotation knob cover to the needle length of effective control needle tube of needle tube, through the filling of sealing glue between needle holder and the cavity cylinder between liquid guide connector, between needle holder and needle tube, not only can the sealing effect of the connection between needle holder and needle tube, avoid the leakage phenomenon when injecting, can also play the fixing effect between needle tube, prevent needle tube from appearing the shaking in the use process, finally still can strengthen the fixing between needle holder and cavity cylinder.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a sterile injection needle. Background Technology

[0002] With the continuous development of the medical aesthetics industry, disposable sterile injection needles have stood out as a popular product due to their high safety, minimal invasiveness, and excellent cosmetic effects. When assembled with a disposable sterile syringe and an electronic injector, the disposable sterile injection needle utilizes negative pressure to inject sodium hyaluronate (cosmetic solution) into the dermis layer to a depth of 1-2mm, thereby improving the patient's facial appearance.

[0003] Existing sterile injection needles use metal cannulas while the needle hub is made of plastic. Leakage often occurs between the cannulas and hub due to inadequate sealing. Furthermore, the depth of the epidermis varies among individuals undergoing injectable cosmetic procedures; some have thinner skin, while others have thicker skin. Because practitioners often lack control over the needle's extension length, this can easily leave needle marks of varying depths on the patient's face, resulting in less than ideal cosmetic outcomes. In severe cases, some wounds may even become inflamed. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a new type of sterile injection needle to solve the problems of leakage and lack of control over the needle extension length in the prior art.

[0005] To achieve the above objectives, this utility model provides a sterile injection needle, including a liquid guide connector, a knob cover, a needle seat, a needle tube, and a main body shell. The liquid guide connector has a connecting part at the upper end that connects to the syringe and an open cavity cylinder at the lower end. The connecting part and the cavity cylinder are provided with liquid outlet holes that can communicate with each other.

[0006] The needle hub is embedded in the hollow cylinder and fixedly connected to the hollow cylinder. The needle tube is inserted into the bottom of the hollow cylinder and connected to the corresponding needle hole of the needle hub. The needle tube is connected to the inside of the liquid outlet through the needle hub.

[0007] The upper end of the main body shell is provided with an inner cavity, and the hollow cylinder is installed in the inner cavity of the main body shell. The main body shell is provided with a horizontally arranged partition, and the partition is provided with a needle outlet hole, through which the needle tube passes.

[0008] The liquid guide connector is provided with a baffle, and the baffle forms a circular groove with the top of the hollow cylinder. The upper end of the knob cover is located in the circular groove. The inner side of the knob cover is provided with an internal thread, and the upper end of the main body shell is provided with an external thread. The knob cover is threadedly connected to the main body shell.

[0009] Furthermore, each of the needle holes in the main body shell is provided with a downwardly extending protective sleeve, and each protective sleeve does not extend beyond the lower end face of the main body shell.

[0010] Furthermore, the partition of the main body shell divides the inner cavity of the main body shell into an upper cavity and a lower cavity, and the main body shell is provided with a negative pressure connector, which is connected to the lower cavity.

[0011] Furthermore, there are nine needle outlets and nine needle tubes, and all the needle outlets and all the needle tubes are distributed in a matrix.

[0012] Furthermore, the outer side of the hollow cylinder is provided with a protruding ridge, and the inner side of the upper end of the main shell is provided with a groove corresponding to the protruding ridge.

[0013] Furthermore, the inner side of the hollow cylinder is provided with a second groove, and the needle seat is provided with a second protrusion corresponding to the second groove.

[0014] Furthermore, the top of the hollow cylinder is provided with a cylindrical groove, and the needle seat is provided with a cylindrical protrusion corresponding to the cylindrical groove.

[0015] Furthermore, the needle hub and the hollow cylinder, as well as the needle hub and the needle tube, are fixedly connected by sealant.

[0016] Furthermore, the needle holder is provided with a cross-shaped flow channel, and the needle hole is located on the cross-shaped flow channel.

[0017] Furthermore, the knob cover consists of a left knob cover and a right knob cover, which are connected by a snap fastener, and the outer wall of the knob cover is provided with multiple anti-slip strips.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects:

[0019] 1. This utility model adjusts the vertical position between the liquid guide connector and the main body shell by rotating the knob cover, thereby effectively controlling the needle extension length of the needle tube, so as to unify the needle insertion depth, effectively improve the cosmetic effect and reduce the risk of medical accidents.

[0020] 2. In this utility model, the needle seat and the hollow cylinder, as well as the needle seat and the needle tube, are fixedly connected by sealant. The sealant fills more than half of the hollow cylinder. The sealant not only seals the connection between the needle seat and the needle tube to prevent leakage during injection, but also fixes the needle tube to prevent it from shaking during use. Finally, it strengthens the fixation between the needle seat and the hollow cylinder. Attached Figure Description

[0021] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0022] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which this utility model can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should fall within the scope of the technical content disclosed in this utility model.

[0023] Figure 1 This is an overall structural diagram of the present invention;

[0024] Figure 2 This is a diagram of the internal structure of this utility model;

[0025] Figure 3 This is a schematic diagram showing the connection between the fluid guide connector, needle seat, and needle tube in this utility model;

[0026] Figure 4 This is a schematic diagram of the needle holder structure of this utility model;

[0027] In the diagram: 1. Liquid guide connector; 2. Knob cover; 3. Main body shell; 4. Needle seat; 5. Needle tube; 11. Connecting part; 12. Hollow cylinder; 13. Liquid outlet hole; 14. Baffle; 15. Circular groove; 31. Inner cavity; 32. Partition; 33. Needle outlet hole; 34. Protective sleeve; 35. Negative pressure connector; 41. Needle hole; 42. Protruding ridge II; 43. Cylindrical protrusion; 44. Cross-shaped flow channel. Detailed Implementation

[0028] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] To make the objectives and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0030] like Figures 1 to 4 As shown, this utility model provides a sterile injection needle, including a liquid guide connector 1, a knob cover 2, a needle seat 4, a needle tube 5, and a main body shell 3. The liquid guide connector 1 has a connecting part 11 at the upper end that is connected to the syringe and an open cavity cylinder 12 at the lower end. The connecting part 11 and the cavity cylinder 12 are provided with liquid outlet holes 13 that can communicate with each other.

[0031] The needle seat 4 is embedded in the hollow cylinder 12 and is fixedly connected to the hollow cylinder 12. The needle tube 5 is inserted into the bottom of the hollow cylinder 12 and is connected to the corresponding needle hole 41 of the needle seat 4. The needle tube 5 is connected to the inside of the liquid outlet hole 13 through the needle seat 4.

[0032] The upper end of the main body shell 3 is provided with an inner cavity 31, and the hollow cylinder 12 is installed in the inner cavity 31 of the main body shell 3. The main body shell 3 is provided with a horizontally arranged partition 32, and the partition 32 is provided with a needle outlet 33. The needle tube 5 passes through the needle outlet 33.

[0033] The liquid guide connector 1 is provided with a baffle 14, and the baffle 14 and the top of the hollow cylinder 12 form a circular groove 15. The upper end of the knob cover 2 is located in the circular groove 15. The inner side of the knob cover 2 is provided with an internal thread, and the upper end of the main body shell 3 is provided with an external thread. The knob cover 2 is threadedly connected to the main body shell 3.

[0034] When the knob cover 2 is rotated, it will drive the liquid guide connector 1 to move axially, and will also drive the fixed needle seat 4 and needle tube 5 to move axially within the main body shell 3, thereby realizing the extension or retraction of the needle tube 5 within the main body shell 3.

[0035] Each needle outlet 33 of the main body shell 3 is provided with a downwardly extending protective sleeve 34, and each protective sleeve 34 does not extend beyond the lower end face of the main body shell 3. The protective sleeve 34 is conical. When the needle tube 5 is not disengaging, the needle tip of the needle tube 5 is wrapped by the protective sleeve 34 to improve the safety factor of the sterile injection needle. In addition, the protective sleeve 34 can improve the positioning of the needle tube 5.

[0036] The partition 32 of the main body shell 3 divides the inner cavity 31 of the main body shell 3 into an upper cavity and a lower cavity. The main body shell 3 is provided with a negative pressure connector 35, which communicates with the lower cavity. The negative pressure connector 35 is used to connect to an external negative pressure tube. During injection, the individual's skin can be adsorbed onto the lower end face of the main body shell under the action of the negative pressure tube, so as to solve the technical problem of inconvenient injection due to the elasticity of the skin.

[0037] In application, first install the connecting part 11 of the sterile injection needle's liquid guide connector 1 onto the syringe connector containing liquids such as hyaluronic acid or water-light serum. Connect the negative pressure connector 35 of the main body shell 3 to the negative pressure pump interface (including but not limited to) the water-light gun via a negative pressure tube. Then connect the syringe with the sterile injection needle to the water-light gun. When injecting liquid, set the water-light gun's output parameters and start it. Rotate the knob cover 2 to move the liquid guide connector 1 downwards axially, synchronously displacing the needle tip of the needle tube 5 axially to expose 1-3mm from the lower end face of the main body shell 3. Place the lower end face of the main body shell 3 and the needle tip of the needle tube 5 onto the skin. The needle tip presses the skin down elastically, but the needle tip of needle tube 5 does not necessarily enter the skin. When the water light gun is activated, the negative pressure pump of the water light gun works, and the gas in the lower cavity of the main body shell 3 is extracted through the connected negative pressure tube, so that the air pressure in the lower cavity of the main body shell 3 is less than the atmospheric pressure. At this time, under the action of negative pressure, the skin of the person contracts tightly and bounces upward, actively entering the needle tip of needle tube 5 1-3mm. The water light gun injects the liquid containing hyaluronic acid, water light essence and other liquids into the lower layer of the skin in a quantitative, timed and even manner. The pain of the skin is greatly reduced, and multiple needle tubes can be injected at the same time, which is safe, reduces the injection time, and is more conducive to even surface coverage injection.

[0038] This invention can also be installed on a syringe, eliminating the need for a water jet gun; it can be used directly by hand holding the syringe.

[0039] The number of needle outlets 33 and needle tubes 5 are both nine, and all needle outlets 33 and needle tubes 5 are distributed in a matrix. The nine-needle setup can significantly improve injection efficiency.

[0040] To ensure the relative position between the needle tube 5 and the needle outlet 33, an anti-rotation structure is required. The outer side of the hollow cylinder 12 is provided with a protruding ridge, and the inner side of the upper end of the main body shell 3 is provided with a groove corresponding to the protruding ridge, so that the liquid guide connector 1 and the main body shell 3 cannot rotate relative to each other, thereby ensuring the relative position between the needle tube 5 and the needle outlet 33.

[0041] During injection, the knob cover 2 is rotated to adjust the vertical position between the liquid guide connector 1 and the main body shell 3. Because an anti-rotation structure is provided between the liquid guide connector 1 and the main body shell 3, the rotation of the knob cover 2 will not cause the liquid guide connector 1 to rotate. The upper end of the knob cover 2 is located within the circular groove 15 of the liquid guide connector 1, allowing the liquid guide connector 1 to move upwards or downwards via the circular groove 15. When the knob cover 2 moves the liquid guide connector 1 downwards, the needle tip of the needle tube 5, which is fixedly connected to the liquid guide connector 1, gradually extends out from the lower end face of the main body shell 3. When the knob cover 2 moves the liquid guide connector 1 upwards, the needle tip of the needle tube 5, which is fixedly connected to the liquid guide connector 1, gradually retracts into the protective sleeve 34 of the main body shell 3. Compared with the prior art, this invention can effectively control the needle extension length to uniformly control the insertion depth, effectively improving the cosmetic effect and reducing the risk of medical accidents.

[0042] The inner side of the hollow cylinder 12 is provided with a groove II, and the needle seat 4 is provided with a protrusion II 42 corresponding to the groove II, so that the liquid guide connector 1 and the needle seat 4 cannot rotate relative to each other.

[0043] The top of the hollow cylinder 12 is provided with a cylindrical groove, and the needle seat 4 is provided with a cylindrical protrusion 43 corresponding to the cylindrical groove. The cylindrical protrusion 43 is aligned and embedded into the cylindrical groove of the hollow cylinder 12 to tightly fix the needle seat 4 and the liquid guide connector 1.

[0044] The needle hub 4 and the hollow cylinder 12, as well as the needle hub 4 and the needle tube 5, are all fixedly connected by sealant. Furthermore, the sealant fills more than half of the hollow cylinder 12, and the filled portion is as follows: Figure 3 As shown in A, the sealant not only seals the connection between the needle hub 4 and the needle tube 5, preventing leakage when liquid flows from the needle hub 4 into the needle tube 5 during injection, but also fixes the needle tubes 5 to prevent them from shaking during use. Finally, it also strengthens the fixation between the needle hub 4 and the hollow cylinder 12.

[0045] The needle holder 4 is provided with a cross-shaped flow channel 44, and the needle hole 41 is provided on the cross-shaped flow channel 44. When the needle holder 4 is fixed to the top of the hollow cylinder 12 by the cylindrical protrusion 43, the liquid outlet hole 13 and the cross-shaped flow channel 44 form a closed space. The liquid in the syringe flows into the cross-shaped flow channel from the liquid outlet hole 13 and then enters the needle tube 5 through the needle hole 41 and flows out.

[0046] The knob cover 2 consists of a left knob cover and a right knob cover, which are connected by a snap fastener. The outer wall of the knob cover 2 is provided with multiple anti-slip strips to facilitate rotation.

[0047] In this invention, the liquid guide connector 1, needle seat 4, needle tube 5 and main body shell 3 are all integrally formed, thereby ensuring the strength of each component during use.

Claims

1. A sterile injection needle, characterized in that It includes a liquid guide connector (1), a knob cover (2), a needle seat (4), a needle tube (5), and a main body shell (3). The liquid guide connector (1) has a connecting part (11) at the upper end that connects to the syringe and an open cavity cylinder (12) at the lower end. The connecting part (11) and the cavity cylinder (12) are provided with liquid outlet holes (13) that can communicate with each other. The needle seat (4) is embedded in the hollow cylinder (12) and fixedly connected to the hollow cylinder (12). The needle tube (5) is inserted into the bottom of the hollow cylinder (12) and inserted into the corresponding needle hole (41) of the needle seat (4). The needle tube (5) is connected to the inside of the liquid outlet hole (13) through the needle seat (4). The upper end of the main shell (3) is provided with an inner cavity (31), the hollow cylinder (12) is installed in the inner cavity (31) of the main shell (3), the main shell (3) is provided with a horizontally arranged partition (32), the partition (32) is provided with a needle outlet hole (33), and the needle tube (5) is inserted into the needle outlet hole (33); The liquid guide connector (1) is provided with a baffle (14), and the baffle (14) and the top of the hollow cylinder (12) form a circular groove (15). The upper end of the knob cover (2) is located in the circular groove (15). The inner side of the knob cover (2) is provided with an internal thread, and the upper end of the main body shell (3) is provided with an external thread. The knob cover (2) is threadedly connected to the main body shell (3).

2. The aseptic injection needle of claim 1, wherein, Each of the needle holes (33) of the main body shell (3) is provided with a downwardly extending protective sleeve (34), and each protective sleeve (34) does not extend beyond the lower end face of the main body shell (3).

3. The aseptic injection needle of claim 1, wherein, The partition (32) of the main shell (3) divides the inner cavity (31) of the main shell (3) into an upper cavity and a lower cavity. The main shell (3) is provided with a negative pressure connector (35), which is connected to the lower cavity.

4. The aseptic injection needle of claim 1, wherein, The number of needle outlets (33) and needle tubes (5) are both nine, and all needle outlets (33) and needle tubes (5) are distributed in a matrix.

5. The aseptic injection needle of claim 1, wherein, The outer side of the hollow cylinder (12) is provided with a protruding ridge, and the inner side of the upper end of the main shell (3) is provided with a groove corresponding to the protruding ridge.

6. The aseptic injection needle of claim 1, wherein, The inner side of the hollow cylinder (12) is provided with a groove II, and the needle seat (4) is provided with a protrusion II (42) corresponding to the groove II.

7. The aseptic injection needle of claim 1, wherein, The top of the hollow cylinder (12) is provided with a cylindrical groove, and the needle seat (4) is provided with a cylindrical protrusion (43) corresponding to the cylindrical groove.

8. The aseptic injection needle of claim 1, wherein, The needle seat (4) and the hollow cylinder (12), as well as the needle seat (4) and the needle tube (5), are fixedly connected by sealant.

9. The aseptic injection needle of claim 1, wherein, The needle holder (4) is provided with a cross-shaped flow channel (44), and the needle hole (41) is provided on the cross-shaped flow channel (44).

10. The aseptic injection needle of claim 1, wherein, The knob cover (2) consists of a left knob cover and a right knob cover, which are connected by a snap fastener. Multiple anti-slip strips are provided on the outer side wall of the knob cover (2).

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