Syringe needle with adjustable needle distance

Abstract

The injection needle with the adjustable needle spacing comprises a needle tube arranged on a needle seat and a knob nested on the outer wall of the needle tube, a splitter plate is arranged on the needle seat, and a plurality of splitter holes communicated with a main runner are formed in the splitter plate; the outer wall of each needle tube is independently and fixedly connected with a sliding block; the knob sleeves the periphery of the guide block; the guide block is provided with guide block sliding grooves, wherein the number of the guide block sliding grooves is consistent with that of the needle tubes. The dynamic adjustment function of the needle distance enables the injection needle head to adapt to various medicament types, and the problem that the fixed needle distance design cannot meet the diffusion characteristics of different medicaments in the prior art is solved. The needle spacing is adjusted according to the medicament viscosity, so that the problem of overlapped injection caused by a large diffusion range of a thin medicament and the problem of insufficient coverage caused by a small diffusion range of a dense medicament are effectively avoided, the treatment effect is optimized, and the safety is improved.

Description

Technical Field

[0001] The present invention relates to the field of microneedle injection needles, and in particular to an injection needle with adjustable needle spacing. Background Art

[0002] Microneedle injection needles, also known as water light needles, are a common skin beauty treatment product used for facial water light injections. They inject hyaluronic acid into the surface layer of the skin to provide moisturizing, nourishing and improve skin quality.

[0003] Existing microneedle injection needles mostly use a fixed-gauge design, but this fixed-gauge design is not adjustable. The diffusion range of drugs with different viscosities varies significantly. When dilute drugs have a wide diffusion range, a fixed-gauge design can lead to overlapping injections, resulting in overinjection, adverse reactions, or waste. When thick drugs have a narrow diffusion range, the fixed-gauge design provides insufficient coverage, resulting in suboptimal results. Furthermore, fixed-gauge needles lack versatility; the same needle cannot be used with a variety of injection types, necessitating frequent needle changes.

[0004] Therefore, the problems existing in the prior art need to be further improved and developed. Summary of the Invention

[0005] (1) Purpose of the invention: In order to solve the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide an injection needle with adjustable needle spacing, which can adapt to the diffusion characteristics of drugs with different viscosities by dynamically adjusting the needle spacing, avoid over-injection or insufficient coverage, and improve the versatility and safety of the injection needle.

[0006] (II) Technical Solution: To solve the above-mentioned technical problems, the present technical solution provides an injection needle with adjustable needle spacing, comprising a needle tube disposed on a needle seat, and a knob nested in the outer wall of the needle tube; a diverter plate is disposed on the needle seat, and the diverter plate is provided with a plurality of diverter holes connected to the main flow channel; a slider is independently fixedly connected to the outer wall of each needle tube; the knob is sleeved on the outer periphery of a guide block; and the guide block is provided with guide block slots that are the same number as the needle tubes; The knob is provided with a distance adjustment slot, and the slider is embedded in the distance adjustment slot and the guide block slot. The distance adjustment slot drives the slider to move along the guide block slot, driving the needle tube to synchronously move centripetally or centrifugally to adjust the needle distance.

[0007] Furthermore, the number of the needle tubes is ≥2.

[0008] Furthermore, the slider includes a front cylinder, a middle square cylinder and a rear cylinder; the front cylinder is cylindrical and located at the front end of the slider; the rear cylinder is cylindrical and located at the rear end of the slider; the middle square cylinder is a flat rectangular parallelepiped and located in the middle part of the front cylinder and the rear cylinder; the axis of the front cylinder, middle square cylinder and rear cylinder of each slider coincides with the axis of the corresponding needle tube.

[0009] Furthermore, the knob is located at the front end of the slider, and is a cylindrical structure with openings at both ends, a horizontal plate in the middle, and a distance adjustment slot is provided on the horizontal plate of the knob, and the number of the distance adjustment slots is consistent with the number of the needle tubes.

[0010] Furthermore, the front and rear ends of the distance-adjusting chute pass through the horizontal plate, and the distance-adjusting chute is distributed in a spiral shape on the horizontal plate, and the center point of the spiral is located on the axis of the knob.

[0011] Furthermore, the center of the horizontal plate of the knob is a hollow circular hole; a cylindrical protrusion is provided at the center of the front end of the guide block, and the cylindrical protrusion is inserted into the hollow circular hole in the center of the knob horizontal plate. The cylindrical protrusion is used to fix the guide block to the knob, and the outer diameter of the cylindrical protrusion is equal to the aperture of the hollow circular hole in the center of the knob horizontal plate.

[0012] Furthermore, the guide block is located between the slider and the diverter plate and is a disc-shaped structure. The knob is sleeved on the outer circumference of the guide block, and a sealing ring is provided between the knob and the guide block for sealing.

[0013] Furthermore, the guide block is provided with guide block slots having the same number as the needle tubes, the guide block slots extend radially, and the front and rear ends of the guide block slots pass through the guide block.

[0014] Furthermore, a raised limiting groove is provided on the front end face of the guide block, and the limiting groove is in the shape of a hollow arrow with the arrow pointing toward the axis of the guide block. The area between the arrows of the two limiting grooves provides limiting for the slider of the inner ring, and the area inside the hollow arrow body of the limiting groove provides limiting for the slider of the outer ring.

[0015] Furthermore, the front cylinder of the slider is embedded in the distance adjustment slot, the rear cylinder of the slider is embedded in the guide block slot, and the middle square column of the slider is limited in the limiting slot of the guide block.

[0016] (III) Beneficial Effects: The dynamic adjustment of needle spacing in this invention enables the injection needle to adapt to a variety of drug types, resolving the problem of fixed needle spacing designs in the prior art that cannot meet the diffusion characteristics of different drugs. By adjusting the needle spacing according to the drug viscosity, the problem of overlapping injections caused by the wide diffusion range of thin drugs and the problem of insufficient coverage caused by the narrow diffusion range of dense drugs are effectively avoided, thereby optimizing the treatment effect and improving safety. The intuitive knob adjustment and scale marking design allow users to quickly set the needle spacing, with convenient and precise operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a diagram showing the assembly relationship between the needle tube and the slider in the present invention; Figure 2 This is a diagram showing the assembly relationship between the slider and the guide block slot in the present invention; Figure 3 is a cross-sectional view of the injection needle of the present invention; Figure 4 This is a schematic diagram of the clockwise adjustment principle of the needle spacing in the present invention; Figure 5 This is a schematic diagram of the counterclockwise adjustment principle of the needle spacing in the present invention; Figure 6 Schematic diagram of the structure of the guide block in the present invention; Figure 7 This is an exploded view of the injection needle of the present invention.

[0018] Figure numerals: 1, needle seat; 2, diverter plate; 3, needle tube; 4, guide block; 5, sealing ring; 6, slider; 7, knob; 8, sheath; 401, guide block slide groove; 701, distance adjustment slide groove. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with preferred embodiments. More details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can obviously be implemented in a variety of other ways different from the description. Those skilled in the art can make similar generalizations and deductions based on actual application situations without violating the connotation of the present invention. Therefore, the scope of protection of the present invention should not be limited by the content of this specific embodiment.

[0020] The accompanying drawings are schematic diagrams of embodiments of the present invention. It should be noted that the drawings are merely examples and are not drawn to scale, and should not be used to limit the actual scope of protection claimed in the present invention.

[0021] An injection needle with adjustable needle spacing comprises a needle tube 3 mounted on a needle base 1 and a knob 7 nested in the outer wall of the needle tube 3. A diverter plate 2 is disposed on the needle base 1, and the diverter plate 2 is provided with a plurality of diverter holes communicating with the main flow channel. A slider 6 is independently fixedly connected to the outer wall of each needle tube 3. The knob 7 is sleeved on the outer periphery of a guide block 4. The guide block 4 is provided with guide block slots 401, the same number as the needle tubes 3. The knob 7 is provided with a distance adjustment slot 701, and the slider 6 is embedded in the distance adjustment slot 701 and the guide block slot 401. The distance adjustment slot 701 drives the slider 6 to move along the guide block slot 401, driving the needle tube 3 to synchronously move centripetally or centrifugally to adjust the needle distance.

[0022] The central axis of the needle hub 1 is used as the reference axis. Along the reference axis, the end closest to the syringe is the rear end, and the end closest to the needle tip of the needle tube 3 is the front end. The radial direction is perpendicular to the reference axis, and the circumferential direction is the rotational direction around the reference axis. The axes of the diverter plate 2, knob 7, and guide block 4 coincide with the reference axis.

[0023] Specifically, such as Figure 1-7 As shown, the rear end of the needle seat 1 is provided with a Luer interface for connecting a syringe; the diverter plate 2 is fixed to the front end inside the needle seat 1, and the diverter plate 2 is provided with a main channel and a diverter hole, the main channel is connected to the Luer interface, and the diverter hole is connected to the main channel; the rear end of the needle tube 3 is connected to the diverter hole one by one; the number of the needle tubes 3 is ≥2; each of the outer walls of the needle tube 3 is independently fixedly connected to a slider 6; the knob 7 is sleeved on the outer periphery of the guide block 4 and is coaxially arranged with the diverter plate 2; the front end of the knob 7 is threadedly connected to the rear end of the sheath 8, and the sheath 8 rotates synchronously with the knob 7; the guide block 4 is provided with a guide block slot 401 that is the same in number as the needle tubes 3, and the guide block slot 401 extends radially.

[0024] The knob 7 is provided with a distance-adjusting groove 701, the front end of the slider 6 is embedded in the distance-adjusting groove 701, and the rear end of the slider 6 is embedded in the guide block groove 401. When the knob 7 is rotated, the distance-adjusting groove 701 drives the slider 6 to move spirally and radially along the guide block groove 401, driving the needle tube 3 to move synchronously centripetally or centrifugally to adjust the needle distance.

[0025] The needle seat 1 is a cylindrical hollow structure with a Luer interface at the rear end, which matches the syringe. The front end of the needle seat 1 is open, and an annular step is provided inside the needle seat 1 for positioning the diverter plate 2.

[0026] The structure shape of the flow distribution plate 2 matches the arrangement mode of the needle tube 3. The center of the rear end of the flow distribution plate 2 is provided with a main flow channel communicated with the needle seat 1, and the front end of the flow distribution plate 2 is distributed with flow distribution holes consistent with the number of the needle tube 3, and the hole diameter of the flow distribution hole matches the outer diameter of the needle tube 3. The main flow channel of the flow distribution plate 2 is communicated with the flow distribution hole, and is used for circulating the medicament. The flow distribution plate 2 is clamped or bonded with the needle seat 1 through the annular step inside the needle seat 1, so as to ensure that the front end and the rear end of the flow distribution plate 2 have no leakage of the medicament.

[0027] The front end of the needle tube 3 is a beveled needle tip, and the rear end is a flat mouth. Preferably, the needle tube 3 is a stainless steel capillary tube. The rear end of the needle tube 3 is inserted into the flow distribution hole of the flow distribution plate 2, and the insertion depth is 1-2 mm, which is fixed by laser welding. The welding point is located at the junction of the front end surface of the flow distribution plate 2 and the outer wall of the needle tube 3, and forms an annular seal. Preferably, the needle tube 3 is in a circular ring array.

[0028] As shown in Figure 1 Each outer wall of the needle tube 3 is independently fixedly connected with one sliding block 6, and the sliding block 6 includes a front cylinder, a middle square column and a rear cylinder. The front cylinder is cylindrical and located at the front end of the sliding block 6; the rear cylinder is cylindrical and located at the rear end of the sliding block 6; and the middle square column is a flat cuboid and located between the front cylinder and the rear cylinder. The axis of the front cylinder, the middle square column and the rear cylinder of each sliding block 6 coincides with the axis of the corresponding needle tube 3.

[0029] The knob 7 is located at the front end of the sliding block 6 and has a cylindrical structure with two open ends, and a horizontal plate is arranged in the middle. The vertical section is H-shaped, the outer wall of the knob 7 is provided with a convex column, and the convex column is used to provide a force point when the knob 7 rotates. A distance adjusting sliding groove 701 is arranged on the horizontal plate of the knob 7, the number of the distance adjusting sliding grooves 701 is consistent with the number of the needle tube 3, the front and rear ends of the distance adjusting sliding groove 701 penetrate the horizontal plate, the distance adjusting sliding grooves 701 are distributed in a spiral line on the horizontal plate and the spiral center point is located on the axis of the knob 7. The center of the horizontal plate of the knob 7 is a hollow hole.

[0030] As shown in Figure 6As shown, the guide block 4 is located between the slider 6 and the diverter plate 2 and has a disc-shaped structure. The knob 7 is sleeved on the outer circumference of the guide block 4, and a sealing ring 5 is provided between the knob 7 and the guide block 4 for sealing. The guide block 4 is provided with guide block grooves 401, which are the same number as the needle tubes 3. The guide block grooves 401 extend radially, and the front and rear ends of the guide block grooves 401 pass through the guide block 4. The front surface of the guide block 4 is also provided with a raised limit groove, which is in the shape of a hollow arrow, with the arrow pointing toward the axis of the guide block 4. The space between the arrowhead outer walls of the two limit grooves provides a limit for the inner ring slider 6, and the hollow arrow body of the limit groove provides a limit for the outer ring slider 6. A cylindrical protrusion is provided at the center of the front end of the guide block 4. The cylindrical protrusion is inserted into the hollow circular hole in the center of the horizontal plate of the knob 7, and is used to fix the guide block 4 to the knob 7. The outer diameter of the cylindrical protrusion is equal to the diameter of the hollow circular hole in the center of the horizontal plate of the knob 7. A guide block 4 connecting arm is fixedly provided at the rear end of the guide block 4. The guide block 4 connecting arm is snap-fitted to the needle seat 1 to fix the guide block 4 to the needle seat 1.

[0031] The front cylinder of the slider 6 is embedded in the distance adjustment slot 701, the rear cylinder of the slider 6 is embedded in the guide block slot 401, and the middle square column of the slider 6 is limited in the limit slot of the guide block 4. Figure 4 、 5 As shown, when the knob 7 is rotated, the distance adjustment slot 701 drives the slider 6 to move radially along the guide block slot 401, causing the needle tube 3 to move centrifugally or centrifugally to adjust the needle distance. When injecting a dilute medication, rotating the knob 7 clockwise causes the needle tube 3 to move circumferentially away from the reference axis, increasing the distance between the needles. When injecting a thicker medication, rotating the knob 7 counterclockwise causes the needle tube 3 to move circumferentially toward the reference axis, decreasing the distance between the needles.

[0032] The sheath 8 is a cylindrical structure with two open ends. The front end of the knob 7 is threadedly connected to the rear end of the sheath 8, and the sheath 8 rotates synchronously with the knob 7. A negative pressure chamber is formed between the front end of the sheath 8 and the skin, providing suction to the skin. Preferably, the length of the needle tip protruding from the front end of the sheath 8 is 0.5 to 2.5 mm.

[0033] The present invention provides a preferred embodiment, which, based on the original solution, adds scale marks on the needle seat 1 to correspond to different needle spacing adjustment gears, thereby improving the needle spacing adjustment accuracy and facilitating quantitative adjustment of the needle spacing.

[0034] The application also provides a preferred embodiment, which is based on the original scheme and additionally comprises a viscosity monitoring module, specifically including a micro pressure sensor, a micro flow sensor and an external display screen. The micro pressure sensor and the micro flow sensor are arranged in the shunt hole of the shunt plate 2, for real-time monitoring of the pressure and flow rate of the medicament in the needle tube 3. The external display screen is electrically connected with the micro pressure sensor and the micro flow sensor through wires, for real-time display of the pressure and flow rate of the medicament in the needle tube 3, and calculation of the viscosity of the medicament, thereby providing real-time data basis for the adjustment of the needle spacing. Specifically, before injection, when the medicament flows through the shunt plate 2, the sensor detects the pressure and flow rate data in real time, and the external display screen calculates and displays the pressure, flow rate and viscosity of the medicament according to the preset algorithm of the corresponding relationship between the viscosity and the pressure / flow rate, thereby providing a quantitative basis for the operator to adjust the needle spacing, such as displaying: the recommended needle spacing is 6 mm. By additionally arranging the micro sensor and the external display screen, the application provides real-time quantitative data basis for the adjustment of the needle spacing, thereby further improving the adjustment accuracy.

[0035] The present invention also provides a preferred embodiment. Based on the original solution, two sets of pitch-adjusting grooves 701 with different helix angles are provided on the inner wall of the knob 7. The inner helix angle is smaller than the outer helix angle, and the pitch-adjusting grooves 701 are arranged concentrically along the central axis of the knob 7. An outer stepped damping protrusion is provided on the inner wall of the hollow arrow-shaped body of the guide block 4's limiting groove. The outer stepped damping protrusion increases in height as it radially approaches the reference axis, thereby adjusting the sliding resistance of the outer slider 6 within the limiting groove. An inner stepped damping protrusion is also provided on the arrow-shaped outer wall of the limiting groove. The inner stepped damping protrusion increases in height as it radially moves away from the reference axis, thereby adjusting the sliding resistance of the inner slider 6 within the limiting groove. When the knob 7 is rotated clockwise, the outer slider 6 slides radially within the hollow arrow-shaped body of the limiting groove, away from the reference axis. The resistance exerted by the outer stepped damping protrusion on the outer slider 6 gradually decreases, and the sliding speed of the outer slider 6 increases. The inner slider 6 slides radially on the arrow-shaped outer wall of the limiting groove, away from the reference axis. The resistance exerted by the inner stepped damping protrusion on the inner slider 6 gradually increases, and the sliding speed of the inner slider 6 slows down. Conversely, when the knob 7 is rotated counterclockwise, the outer slider 6 slides radially within the hollow arrow-shaped body of the limiting groove, toward the reference axis. The resistance exerted by the outer stepped damping protrusion on the outer slider 6 gradually increases, and the sliding speed of the outer slider 6 slows down. The inner slider 6 slides radially on the arrow-shaped outer wall of the limiting groove, toward the reference axis. The resistance exerted by the inner stepped damping protrusion on the inner slider 6 gradually decreases, and the sliding speed of the inner slider 6 increases. This embodiment can create a circular, non-uniform needle spacing distribution (sparse at the periphery and dense at the center), supporting dynamic adjustment of the inner and outer ring needle tubes 3, adapting to the needs of injecting dilute medications over large areas or specific local areas. The height of the outer and inner ring stepped damping protrusions is set according to specific needs and is not specifically limited here.

[0036] Working Principle: The needle spacing is preset according to the viscosity of the medication. Turning the knob clockwise or counterclockwise causes the knob to rotate synchronously with the spacing adjustment slot. The inner wall of the spacing adjustment slot squeezes the slider, generating a radial driving force. The slider is constrained by the guide block slot and can only move along the radial trajectory of the guide block slot. It cannot rotate circumferentially with the knob, thus driving the needle tubing in a synchronous radial direction. When the knob is turned clockwise, the needle tubing moves away from the center, increasing the needle spacing. When the knob is turned counterclockwise, the needle tubing moves toward the center, decreasing the needle spacing. Once the needle spacing is adjusted, the negative pressure chamber is activated to apply suction to the skin, and the syringe pushes the medication. After injection, the needle is removed.

[0037] The adjustable needle spacing of the present invention can be used in a variety of skin beauty treatment scenarios. For example, when injecting a hydrating injection into the face, thin agents such as hyaluronic acid have a larger diffusion range. The user can increase the needle spacing by rotating the knob to avoid overinjection or adverse reactions caused by overlapping injections. For dense agents such as whitening injections, the diffusion range is smaller, and the user can reduce the needle spacing to expand the coverage area, thereby ensuring the treatment effect is achieved. By dynamically adjusting the needle spacing, the injection needle can adapt to a variety of drug types, significantly reducing the frequency of needle replacement, operational complexity, and usage costs.

[0038] The dynamic adjustment function of the needle spacing in the present invention enables the injection needle to adapt to a variety of drug types, solving the problem in the prior art that the fixed needle spacing design cannot meet the diffusion characteristics of different drugs. By adjusting the needle spacing according to the viscosity of the drug, the problem of overlapping injections caused by the large diffusion range of thin drugs and the problem of insufficient coverage caused by the small diffusion range of dense drugs are effectively avoided, thereby optimizing the treatment effect and improving safety. The intuitive knob adjustment and scale marking design allow users to quickly set the needle spacing, and the operation is convenient and accurate. In addition, by adding a micro sensor and an external display screen, the present invention provides a real-time quantitative data basis for needle spacing adjustment, further improving the adjustment accuracy.

[0039] The above content is an explanation of the preferred embodiments of the present invention, which can help those skilled in the art to more fully understand the technical solutions of the present invention. However, these embodiments are merely illustrative, and it cannot be determined that the specific implementation methods of the present invention are limited to the description of these embodiments. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions and transformations can be made, which should be deemed to fall within the scope of protection of the present invention.

Claims

1. An injection needle with adjustable needle spacing, comprising a needle tube disposed on a needle seat, and a knob nested in the outer wall of the needle tube, characterized in that: A diverter plate is provided on the needle seat, and a plurality of diverter holes communicating with the main flow channel are provided on the diverter plate; a slider is independently fixedly connected to the outer wall of each needle tube; the knob is sleeved on the outer periphery of the guide block; the guide block is provided with guide block slots that are the same in number as the needle tubes; The knob is provided with a distance adjustment slot, and the slider is embedded in the distance adjustment slot and the guide block slot. The distance adjustment slot drives the slider to move along the guide block slot, driving the needle tube to synchronously move centripetally or centrifugally to adjust the needle distance.

2. The injection needle with adjustable needle spacing according to claim 1, characterized in that: The number of the needle tubes is ≥2.

3. The injection needle with adjustable needle spacing according to claim 1, characterized in that: The slider includes a front cylinder, a middle square cylinder and a rear cylinder; the front cylinder is cylindrical and located at the front end of the slider; the rear cylinder is cylindrical and located at the rear end of the slider; the middle square cylinder is a flat rectangular parallelepiped and located in the middle part of the front cylinder and the rear cylinder; the axis of the front cylinder, middle square cylinder and rear cylinder of each slider coincides with the axis of the corresponding needle tube.

4. The injection needle with adjustable needle spacing according to claim 1, characterized in that: The knob is located at the front end of the slider, and is a cylindrical structure with openings at both ends, with a horizontal plate in the middle. A distance adjustment slot is set on the horizontal plate of the knob, and the number of the distance adjustment slots is consistent with the number of the needle tubes.

5. The injection needle with adjustable needle spacing according to claim 1, characterized in that: The front and rear ends of the distance-adjusting chute pass through the horizontal plate. The distance-adjusting chute is distributed in a spiral shape on the horizontal plate, and the center point of the spiral is located on the axis of the knob.

6. The injection needle with adjustable needle spacing according to claim 1, characterized in that: The center of the horizontal plate of the knob is a hollow circular hole; a cylindrical protrusion is provided at the center of the front end of the guide block, and the cylindrical protrusion is inserted into the hollow circular hole in the center of the knob horizontal plate. The cylindrical protrusion is used to fix the guide block to the knob, and the outer diameter of the cylindrical protrusion is equal to the aperture of the hollow circular hole in the center of the knob horizontal plate.

7. The injection needle with adjustable needle spacing according to claim 1, characterized in that: The guide block is located between the slider and the diverter plate and is a disc-shaped structure. The knob is sleeved on the outer circumference of the guide block. A sealing ring is provided between the knob and the guide block for sealing.

8. The injection needle with adjustable needle spacing according to claim 1, characterized in that: The guide block is provided with guide block sliding grooves having the same number as the needle tubes, the guide block sliding grooves extend radially, and the front and rear ends of the guide block sliding grooves pass through the guide block.

9. The injection needle with adjustable needle spacing according to claim 1, characterized in that: The front end surface of the guide block is also provided with a raised limiting groove, which is in the shape of a hollow arrow with the arrow pointing toward the axis of the guide block. The area between the arrows of the two limiting grooves provides a limit for the slider of the inner ring, and the area inside the hollow arrow body of the limiting groove provides a limit for the slider of the outer ring.

10. The injection needle with adjustable needle spacing according to claim 1, characterized in that: The front cylinder of the slider is embedded in the distance adjustment slot, the rear cylinder of the slider is embedded in the guide block slot, and the middle square column of the slider is limited in the limiting slot of the guide block.

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