Injection nine-needle with negative pressure

Abstract

The utility model discloses a kind of injection nine needle heads with negative pressure, including liquid guide connector, rotating holder, needle seat, needle tube, glue injection sleeve and main body shell, liquid guide connector includes the connector part connected with injector, the docking sleeve connected with rotating holder and the shunt part matched with needle seat to form flow channel, needle seat is connected with nine needle tubes by nine needle positioning channels, and the through connecting hole in liquid guide connector is communicated with needle tube inside by flow channel. The utility model directly sets flow channel communicated with liquid guide connector on needle seat, so that liquid medicine directly enters needle tube after passing through flow channel, reduces the flow distance of liquid medicine before entering needle tube, and avoids liquid leakage.

Description

Technical Field

[0001] This utility model relates to the field of beauty equipment, specifically to a nine-needle injection head with negative pressure. Background Technology

[0002] The sterile nine-needle injection syringe is a specialized medical device commonly used for cosmetic injections such as mesotherapy. It consists of nine needles and can simultaneously inject multiple medications or liquids. These sterile nine-needle injection syringes are typically made of high-quality materials and undergo rigorous aseptic processing to ensure the safety and hygiene of the injection procedure.

[0003] Chinese patent CN212369381U discloses a nine-hole injection needle with negative pressure. The nine-needle Luer connector is screwed to a nine-needle rotary table. The end of the nine-needle Luer connector is connected to a nine-needle baffle and a nine-needle needle seat and is glued and fixed. The nine-needle needle seat is connected to nine needle tubes. The two through-holes in the nine-needle Luer connector are connected to the inside of the needle tubes. The stepped part of the nine-needle needle seat, nine-needle baffle and nine-needle Luer connector, which are connected as a whole, is installed into the nine-needle shell and can slide axially. The needle can make the skin compact under negative pressure and move the needles into the needle tubes. The nine needles can be injected at the same time, which is safe, reduces injection time, and is more conducive to uniform surface coverage injection.

[0004] However, the above-mentioned needle structure is prone to leakage during use. The main reason is that the nine needle tubes are connected to the nine needle seats instead of the baffle that directly forms the flow channel. This means that the liquid needs to pass through the flow channel formed by the end of the nine needle Luer connector and the baffle, the flow channel formed by the baffle and the nine needle seats, and the flow channel formed by the nine needle seats and the nine needle tubes before entering the needle tube. Moreover, these three flow channels are combined, which leads to the problem of poor sealing.

[0005] Therefore, this invention provides a novel nine-needle injection head with negative pressure to solve the leakage problem existing in the prior art. Utility Model Content

[0006] The purpose of this invention is to overcome the defects of the prior art and provide a new type of injection needle with negative pressure to solve the leakage problem of the existing injection needle.

[0007] To achieve the above objectives, this utility model provides a negative pressure injection nine-needle head, including a liquid guide connector, a rotating retainer, a needle seat, a needle tube, an injection sleeve, and a main body shell. The liquid guide connector includes a connector part connected to a syringe, a docking sleeve connected to the rotating retainer, and a diversion part that cooperates with the needle seat to form a flow channel. The needle seat is connected to nine needle tubes through nine needle positioning holes, and the through connection hole in the liquid guide connector communicates with the inside of the needle tube through the flow channel.

[0008] The injection sleeve is provided with a small square hole and a small conical column. The flow divider and the needle seat are installed in the small square hole and fixed to the small square hole. The needle tube connected to the needle seat extends out of the injection sleeve through the small conical column.

[0009] The main body shell is provided with a step that engages with the rotating card seat, a large square hole, a large conical column, a square chamber located outside the large conical column, and a negative pressure connector connected to the square chamber. The injection sleeve, together with the diversion part and the needle seat, is slidably installed into the large square hole of the main body shell and can slide axially. The needle tube is inserted into the large conical column.

[0010] Furthermore, the rotating bracket is threadedly connected to the mating sleeve.

[0011] Furthermore, the docking sleeve is provided with a straight bracket, and the rotating bracket is provided with a groove that matches the straight bracket, and the straight bracket is inserted into the groove for connection.

[0012] Furthermore, the diverter and needle seat are fixed to the small square hole with glue.

[0013] Furthermore, the flow divider and the needle holder are provided with corresponding glue injection holes, and a cavity is left between the needle holder and the small square hole of the glue injection sleeve, through which glue enters the cavity.

[0014] Furthermore, the liquid guide connector is also provided with a reinforcing part, which is located between the docking sleeve and the diversion part.

[0015] Furthermore, four support columns are provided at the end of the large square hole on the main body shell.

[0016] Furthermore, the diversion section is provided with step one, step two and a star-shaped intersecting boss, and there is a connecting hole at the center of the star-shaped intersecting boss.

[0017] Furthermore, the needle holder is provided with a barrier that fits with the first step of the diversion part, a support part that fits with the second step of the diversion part, and a cross-shaped recess that connects with the cross-shaped protrusion of the diversion part. Nine needle positioning holes are provided on the cross-shaped recess.

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

[0019] 1. This utility model directly sets the flow channel connected to the liquid guide connector on the needle seat, so that the liquid medicine enters the needle tube directly after passing through the flow channel, reducing the flow distance of the liquid medicine before entering the needle tube and avoiding leakage.

[0020] 2. This utility model has a cavity between the needle seat and the small square hole of the injection sleeve. After the glue enters the cavity, it can achieve the fixation between the diversion part and the needle seat, between the needle seat and the needle tube, and between the diversion part, the needle seat, the needle tube and the injection sleeve, and the fixation is relatively firm.

[0021] 3. This utility model has a mutually cooperating support and a step two on the needle seat and the flow divider, which further seals the cross-shaped flow channel, thereby ensuring that the medicine flows in the cross-shaped flow channel and avoiding the risk of leakage from the side of the cross-shaped protrusion and concave platform. Attached Figure Description

[0022] 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.

[0023] 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.

[0024] Figure 1 This is an overall structural diagram of the present invention; Figure 2 This is a diagram of the internal structure of this utility model; Figure 3 This is a schematic diagram showing the connection of the liquid guide connector, needle seat, and injection sleeve in this utility model; Figure 4 This is a top view of the liquid guiding connector in this utility model; Figure 5 This is a cross-sectional view of the flow divider of the liquid guide connector in this utility model along direction A; Figure 6 This is a bottom view of the needle holder in this utility model; Figure 7 This is a cross-sectional view of the needle holder along direction B in this utility model; Figure 8 This is an internal structural diagram of another technical solution of this utility model.

[0025] In the diagram: 1. Liquid guide connector; 2. Rotary seat; 3. Main body shell; 4. Needle seat; 5. Needle tube; 6. Injection sleeve; 11. Connector; 12. Docking sleeve; 13. Diverter; 14. Reinforcing part; 131. Step 1; 132. Step 2; 133. Cross-shaped boss; 134. Connecting hole; 135. Injection hole; 31. Step; 32. Large square hole; 33. Large conical column; 34. Square chamber; 35. Negative pressure connector; 36. Support column; 401. Enclosure; 402. Support part; 403. Cross-shaped recess; 404. Needle positioning channel; 61. Small square hole; 62. Small conical column. Detailed Implementation

[0026] 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.

[0027] 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.

[0028] like Figures 1 to 7 As shown, this utility model provides a nine-needle injection head with negative pressure, including a liquid guide connector 1, a rotating seat 2, a needle seat 4, a needle tube 5, an injection sleeve 6, and a main body shell 3. The liquid guide connector 1 includes a connector part 11 connected to the syringe, a docking sleeve 12 connected to the rotating seat 2, and a diversion part 13 that cooperates with the needle seat 4 to form a flow channel. The needle seat 4 is connected to nine needle tubes 5 through nine needle positioning channels 404. The connecting hole 134 through the liquid guide connector 1 communicates with the inside of the needle tube 5 through the flow channel.

[0029] The injection sleeve 6 is provided with a small square hole 61 and a small conical column 62. The diverter 13 and the needle seat 4 are installed in the small square hole 61 and fixed to the small square hole. The needle tube 5 connected to the needle seat 4 extends out of the injection sleeve 6 through the small conical column 62.

[0030] The main body shell 3 is provided with a step 31 that engages with the rotating bracket 2, a large square hole 32, a large conical column 33, a square chamber 34 located outside the large conical column 33, and a negative pressure connector 35 connected to the square chamber 34. The glue injection sleeve 6, together with the diverter 13 and the needle seat 4, is slidably installed into the large square hole 32 of the main body shell 3 and can slide axially. The needle tube 5 is inserted into the large conical column 33.

[0031] When the rotating bracket 2 rotates, it pushes the docking sleeve 12 to move axially.

[0032] In one technical solution, such as Figure 2 As shown, the rotating bracket 2 is threadedly connected to the mating sleeve 12, which requires the rotating bracket 2 to have an internal thread and the mating sleeve 12 to have a corresponding external thread.

[0033] The rotating bracket 2 engages with the step 31 of the main body shell 3 and can rotate around the step 31. At the same time, the rotating bracket 2 is screwed to the pushing part 12 of the liquid guide connector 1. When the rotating bracket 2 is rotated, it will not move axially because the rotating bracket 2 is axially locked to the main body shell 3. The liquid guide connector 1 screwed to the rotating bracket 2 will move axially and drive the fixed needle seat 4, needle tube 5 and main rubber sleeve 6 to move axially in the large square hole 32 of the main body shell 3, thereby realizing the extension or retraction of the needle tube 7 in the large conical column 33.

[0034] In application, the connector 11 of the liquid guide 1 of the nine-needle injection head is first installed on the syringe connector containing liquids such as hyaluronic acid and water-light essence. The negative pressure connector 35 of the main body shell 3 is connected to the negative pressure pump interface, including but not limited to, the water-light gun, via a negative pressure hose. Then, the syringe connected to the nine-needle injection head is connected to the water-light gun. When injecting liquid, after setting the liquid output parameters of the water-light gun, it is started. Rotating the rotating bracket 2 drives the liquid guide 1 to move axially inward, synchronously displacing the needle tip of the needle tube 5 inside the large conical column 33 on the main body shell 3 by axial displacement, exposing it by 1-3mm. The large conical column 33 of the main body shell 3, the outer end face of the square chamber 34, and the needle tip of the needle tube 5 are all in contact with the skin. Press the skin down gently, but not necessarily insert the needle tip of syringe 5 into the skin; start the water light gun, and the negative pressure pump of the water light gun will work, drawing out the gas in the main body shell 3 compartment 34 through the connected negative pressure hose, so that the air pressure in the main body shell 3 compartment 34 is less than atmospheric pressure. At this time, under the action of negative pressure, the skin contracts and bounces upward, actively entering the needle tip of syringe 5 1-3mm, until the skin adheres to the end face of the large conical column 33. The water light gun injects the liquids such as hyaluronic acid and water light essence into the lower layer of the skin in a quantitative, timed and even manner, greatly reducing the pain of the skin, and realizing simultaneous injection of nine syringes, which is safe, reduces injection time, and is more conducive to even surface coverage injection.

[0035] 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.

[0036] In another technical solution, such as Figure 8 As shown, the docking sleeve 12 is provided with a straight bracket, and the rotating bracket 2 is provided with a groove that matches the straight bracket. The straight bracket is inserted into the groove for connection. By rotating the rotating bracket 2, the docking sleeve 12 can be pushed to move axially.

[0037] The diverter 13 and the needle seat 4 are fixed to the small square hole 61 with glue.

[0038] The diversion section 13 and the needle seat 4 are provided with corresponding glue injection holes 135. A cavity 7 is left between the needle seat 4 and the small square hole 61 of the glue injection sleeve 6. The glue enters the cavity 7 through the glue injection hole 135, thereby realizing the fixation between the diversion section 13 and the needle seat 4, between the needle seat 4 and the needle tube 5, and between the diversion section 13, the needle seat 4, the needle tube 5 and the glue injection sleeve 6.

[0039] When glue is injected into cavity 7, the glue not only seals the connection between needle hub 4 and nine needle tubes 5, preventing leakage of medicine from flowing from needle hub 4 into needle tubes 5, but also fixes the nine needle tubes 5 to prevent shaking during use. Finally, it also strengthens the fixation between needle hub 4 and glue injection sleeve 6.

[0040] In the preparation process of this nine-needle injection head, the first step is to assemble and insert the needle. The needle base 4 is inserted into the small square hole 61 of the injection sleeve 6, and then the injection sleeve 6 is placed into the fixture (a tool used for installation). The needle is picked up with tweezers, with the needle tip pointing downwards. The needle is inserted from top to bottom and from left to right, and the needle tip should not touch other objects to avoid bending the needle tip. The second step is to assemble and inject the glue. The liquid guide connector 1 is inserted into the above components. It is important to ensure that the injection holes 135 are aligned. Glue is applied to the injection holes 135 until they are flush with the upper edge of the injection sleeve 6. At this time, the glue completely covers the diversion part 13, which strengthens the fixation between the needle base 4 and the inner wall of the small square hole 61, and between the diversion part 13 and the inner wall of the small square hole 61. At the same time, the glue completely covers the diversion part 13, which further increases the fixation between the diversion part 13 and the small square hole 61. When adjusting the axial extension and retraction of the needle tube 5, the rotating bracket 2 is rotated. The rotating bracket 2 drives the docking sleeve 12 of the liquid guide connector 1 to move axially. The docking sleeve 12 and the diversion part 13 are integrally molded, which in turn drives the diversion part 13 to move axially. In turn, the diversion part 13 drives the needle seat 4, needle tube 5 and main rubber sleeve 6, which are fixed together by glue, to move axially in the large square hole 32 of the main body shell 3.

[0041] The liquid guide connector 1 is also provided with a reinforcing part 14, which is located between the docking sleeve 12 and the diversion part 13. It is used to reinforce the docking sleeve 12 when it is moved by force, and promote the synchronous movement of the diversion part 13.

[0042] In this invention, the liquid guide connector 1, the rotating seat 2, the needle seat 4, the needle tube 5, the glue injection sleeve 6, and the main body shell 3 are all integrally formed, thereby ensuring the strength of each component during use.

[0043] Four support pillars 36 are provided on the side of the large square hole 32 on the main body shell 3 facing the glue injection sleeve 6. The moving distance of the needle tube 5 is determined by the distance L between the end face of the small square hole 61 of the glue injection sleeve 6 and the support pillars 36. When the end face of the small square hole 61 contacts the support pillar 36, the distance L is the minimum value, which is the maximum value of the needle tube 5 protruding from the outer end face of the large conical column 33. Generally, the length is no more than 4mm. When the distance L is the maximum value, it is the length of the needle tube 5 retracted into the outer end face of the large conical column 33. Generally, it will be flush with the outer end face, or retracted within 1mm.

[0044] The larger the contact area between the two objects, the greater the force required for separation. Therefore, the support column 36 reduces the contact between the end face of the small square hole 61 and the end face of the large square hole 32. Thus, when the syringe 5 finishes injection and needs to be retracted, the rotating bracket 2 can be rotated in the opposite direction, achieving separation with less force.

[0045] The diversion section 13 is provided with a first step 131, a second step 132 and a cross-shaped boss 133, and a connecting hole 134 is located at the center of the cross-shaped boss 133.

[0046] The needle holder 4 is provided with a barrier 401 that fits against the step 131 of the diversion part 13, a support part 402 that fits against the step 132 of the diversion part 13, and a cross-shaped recess 403 that connects with the cross-shaped protrusion 133 of the diversion part 13. The cross-shaped recess 403 is provided with nine needle positioning channels 404. The cross-shaped protrusion 133 and the cross-shaped recess 403 connect to form a closed space, which is a cross-shaped flow channel. The liquid medicine in the syringe flows into the cross-shaped flow channel from the connecting hole 134 and then enters the needle hole of the needle tube 5 through the needle positioning channel 404 and is output. Here, a support part 402 and a step 132 that cooperate with each other are respectively provided on the needle seat 4 and the flow divider 13, which further seals the cross-shaped flow channel, thereby ensuring that the medicine flows in the cross-shaped flow channel and avoiding the risk of leakage from the side of the cross-shaped protrusion 133 and the cross-shaped concave platform 403.

Claims

1. A nine-needle injection head with negative pressure, characterized in that, The device includes a liquid guide connector (1), a rotating seat (2), a needle seat (4), a needle tube (5), an injection sleeve (6), and a main body shell (3). The liquid guide connector (1) includes a connector part (11) connected to the syringe, a docking sleeve (12) connected to the rotating seat (2), and a diversion part (13) that cooperates with the needle seat (4) to form a flow channel. The needle seat (4) is connected to nine needle tubes (5) through nine needle positioning holes (404). The connecting hole (134) that runs through the liquid guide connector (1) is connected to the inside of the needle tube (5) through the flow channel. The injection sleeve (6) is provided with a small square hole (61) and a small conical column (62). The diverter (13) and the needle seat (4) are installed in the small square hole (61) and fixed to the small square hole (61). The needle tube (5) connected to the needle seat (4) extends out of the injection sleeve (6) through the small conical column (62). The main body shell (3) is provided with a step (31) that engages with the rotating card seat (2), a large square hole (32), a large conical column (33), a square chamber (34) located outside the large conical column (33), and a negative pressure connector (35) connected to the square chamber (34). The glue injection sleeve (6), together with the diversion part (13) and the needle seat (4), is slidably installed into the large square hole (32) of the main body shell (3) and can slide axially. The needle tube (5) is inserted into the large conical column (33).

2. The nine-needle injection head according to claim 1, characterized in that, The rotating bracket (2) is threadedly connected to the mating sleeve (12).

3. The nine-needle injection head according to claim 1, characterized in that, The docking sleeve (12) is provided with a straight bracket, and the rotating card seat (2) is provided with a groove that matches the straight bracket. The straight bracket is inserted into the groove for connection.

4. The nine-needle injection head according to claim 1, characterized in that, The diverter (13) and needle seat (4) are fixed to the small square hole (61) with glue.

5. The nine-needle injection head according to claim 4, characterized in that, The diversion section (13) and the needle seat (4) are provided with corresponding glue injection holes (135). A cavity (7) is left between the needle seat (4) and the small square hole (61) of the glue injection sleeve (6). The glue enters the cavity (7) through the glue injection hole.

6. The nine-needle injection head according to claim 1, characterized in that, The liquid guide connector (1) is also provided with a reinforcing part (14), which is located between the docking sleeve (12) and the diversion part (13).

7. The nine-needle injection head according to claim 1, characterized in that, Four support columns (36) are provided at the end of the large square hole (32) on the main shell (3).

8. The nine-needle injection head according to claim 1, characterized in that, The diversion section (13) is provided with step one (131), step two (132) and cross-shaped boss (133), and there is a connecting hole (134) at the center of the cross-shaped boss (133).

9. The nine-needle injection head according to claim 8, characterized in that, The needle holder (4) is provided with a enclosure (401) that fits against the first step (131) of the diversion part (13), a support part (402) that fits against the second step (132) of the diversion part (13), and a cross-shaped recess (403) that connects with the cross-shaped protrusion (133) of the diversion part (13). The cross-shaped recess (403) is provided with nine needle positioning holes (404).

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