Intrascar injection treatment device

Abstract

The invention relates to the technical field of medical instruments, and discloses an intrascar injection treatment device. The device comprises a high-pressure injector and an auxiliary seat, the high-pressure injector is composed of an injection cylinder, a piston core rod, a locking piece, an injection needle and a movable sleeve, the injection cylinder is provided with a cylinder lug plate and an injection nipple, the locking piece comprises a connecting cylinder, connecting convex grains are arranged on the inner side of the connecting cylinder, matched connecting concave grains are arranged on a pintle lug plate of the injection needle, and stable connection is achieved; the auxiliary base comprises a bottom carrying plate, an upper vertical protruding block and a telescopic rod, a mounting face is arranged at the top of the upper vertical protruding block, illuminating lamp beads are embedded into the mounting face, and an operation groove is formed in the middle of the bottom carrying plate. By optimizing the locking structure, the injection needle is quickly replaced and stably fixed, the injection precision is improved by utilizing the adjustable auxiliary seat and the illuminating lamp bead, and the stable injection pressure is ensured through the structural design of the high-pressure injector.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to an intra-scar injection therapy device. Background Technology

[0002] Scars are abnormal tissue proliferations that form during the healing process after human trauma. They not only affect appearance, but some scars may also be accompanied by itching, pain, and limited function, severely impacting the patient's quality of life. Intralesional scar injection therapy is a commonly used and effective clinical treatment method. This involves directly injecting corticosteroids, anti-proliferative drugs, etc., into the scar tissue to inhibit fibroblast proliferation and reduce collagen fiber synthesis, thereby softening and flattening the scar.

[0003] However, existing devices for intralesional injection in scars have several drawbacks: First, the connection structure between the injection needle and the syringe is poorly designed, often using a simple plug-and-play connection, which is prone to loosening and detachment during high-pressure injection, leading to drug leakage. This not only affects the treatment effect but may also cause drug waste and local tissue irritation. Second, the injection needles are limited to a single size, failing to meet the injection needs of scars of different thicknesses and types. For example, superficial scars require finer needles, while hypertrophic scars require longer needles. Changing to different needle sizes is cumbersome and prone to contamination. Third, there is a lack of effective... The auxiliary positioning and operation support mechanism requires medical staff to hold the syringe and precisely control the injection depth and angle during clinical operation. Prolonged operation can easily lead to fatigue, resulting in injection position deviation, affecting the uniformity of drug distribution, and thus reducing the treatment effect. Fourth, the field of vision in the scar area is poor during injection, especially in low light or when the scar is hidden, making it difficult to accurately observe the injection site, which increases the difficulty of operation. Fifth, the pressure control during high-pressure injection is not precise enough. Pressure changes are prone to occur during the piston rod push, resulting in uneven drug injection or local tissue damage due to excessive pressure.

[0004] In view of the problems existing in the above-mentioned technologies, there is an urgent need to design an intra-scar injection treatment device that is stable in connection, easy to operate, highly accurate, and widely applicable to meet clinical treatment needs. Summary of the Invention

[0005] The purpose of this invention is to provide an intra-scar injection therapy device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An intracranial injection therapy device includes a high-pressure injector and an auxiliary base, wherein the high-pressure injector is detachably mounted on the auxiliary base;

[0008] The high-pressure injector includes an injection cylinder, a piston rod, a locking component, an injection needle, and a movable sleeve.

[0009] The syringe is a hollow cylindrical structure with openings at both ends. It is made of medical-grade transparent polypropylene with a wall thickness of 1.5-2.0 mm. The outer surface of the syringe has axial volume graduations with a minimum division of 0.1 mL, facilitating precise dosage observation by medical personnel. An integrally formed injection nipple is located at the front end of the syringe. The nipple has a conical structure with its outer diameter gradually decreasing from the end closest to the syringe to the free end. The outer surface of the injection nipple has raised, annular ridges, numbering 3-5 rings, with a spacing of 0.8-1.2 mm between adjacent raised ridges, enhancing the sealing connection with the locking mechanism. Two symmetrical lugs are located at the rear end of the syringe. These lugs are rectangular sheets with a thickness of 2.0-2.5 mm, a length of 15-20 mm, and a width of 8-10 mm. The outer surface of the lugs has anti-slip textures, horizontal stripes spaced 1 mm apart, for easy gripping and operation by medical personnel.

[0010] The piston rod is slidably inserted inside the syringe. The piston rod is made of medical-grade ABS plastic and is 30-40mm longer than the syringe. A piston head is fixedly connected to the front end of the piston rod. The piston head has a cylindrical structure, and its outer diameter matches the inner diameter of the syringe with a gap of 0.02-0.05mm. Two sealing rings are fitted on the outer surface of the piston head. The sealing rings are made of medical-grade nitrile rubber, have a circular cross-section, and a diameter of 1.5-2.0mm. The spacing between the rings is 3-5mm to enhance the seal between the piston head and the inner wall of the syringe, preventing leakage during injection. The rear end of the piston rod is equipped with a push handle, which is a circular plate structure with a diameter of 25-30mm. The outer surface of the push handle is provided with anti-slip protrusions, which are 1mm in diameter and spaced 2mm apart, to facilitate the application of thrust. The piston rod is provided with pressure scale lines along the axial direction, with a scale range of 0-50N and a minimum division of 1N, to facilitate medical personnel in controlling the injection pressure.

[0011] The locking element is fitted onto the injection nipple to secure the injection needle. The locking element includes a connecting cylinder, which is a cylindrical hollow structure made of medical-grade stainless steel with a wall thickness of 1.0-1.2 mm. The inner diameter of the connecting cylinder matches the maximum outer diameter of the injection nipple. The front end of the inner wall of the connecting cylinder has connecting ridges, which are annular threads with a pitch of 1.0-1.2 mm and a thread angle of 60°. The rear end of the inner wall of the connecting cylinder has a lower mounting groove, which is an annular groove with a depth of 0.8-1.0 mm and a width of 1.0-1.2 mm. A sealing ring, made of medical-grade silicone, is embedded in the lower mounting groove. Its outer diameter matches the width of the lower mounting groove, and its inner diameter fits tightly against the outer surface of the injection nipple, enhancing the seal between the locking element and the injection nipple. The outer surface of the connecting cylinder has anti-slip patterns in the center. These anti-slip patterns are vertical stripes, numbering 12-16, evenly distributed around the circumference of the connecting cylinder, facilitating the rotation of the locking element.

[0012] The injection needle includes a plug and a shaft. The plug is cylindrical and made of medical-grade stainless steel. The rear end of the plug has a loop plate, which is an annular protrusion whose outer diameter matches the inner diameter of the connecting tube. The outer surface of the loop plate has connecting grooves that match the connecting protrusions, enabling threaded connection between the injection needle and the locking element. The front end of the plug is integrally formed with the shaft, which is hollow and made of medical-grade stainless steel. The shaft has various outer diameters: 0.3mm, 0.4mm, 0.5mm, 0.6mm, and 0.7mm, corresponding to lengths of 5mm, 8mm, 10mm, 12mm, and 15mm, to accommodate injection needs for scars of different thicknesses. The front end of the shaft has a beveled face with an angle of 30°-45° for easy puncture of scar tissue.

[0013] The movable sleeve is fitted onto the outer surface of the syringe. The movable sleeve has a cylindrical hollow structure and is made of medical-grade ABS plastic. The inner diameter of the movable sleeve matches the outer diameter of the syringe with a gap of 0.1-0.2mm. The movable sleeve can slide along the axial direction of the syringe. The outer surface of the movable sleeve has anti-slip protrusions, which are hemispherical in shape, 2mm in diameter, and spaced 3mm apart, for easy gripping. The front end of the movable sleeve has an installation groove, which is an annular groove with a depth of 1.5-2.0mm and a width of 2.0-2.5mm, for attaching a protective cap to protect the injection needle.

[0014] The auxiliary seat includes a base plate, an upper protrusion, and a telescopic rod. The base plate is a rectangular plate structure made of medical-grade ABS plastic. The base plate is 150-200mm long, 100-120mm wide, and 10-15mm thick. The lower surface of the base plate is provided with an anti-slip pad made of medical-grade silicone, 2-3mm thick, with a diamond-shaped anti-slip pattern to enhance the stability of the auxiliary seat when placed. A working groove is provided in the middle of the base plate. The working groove is a rectangular recess with a length of 80-100mm, a width of 50-60mm, and a depth of 10-15mm to accommodate the scar area and provide space for injection operations.

[0015] The upper protrusion is fixedly installed on both sides of the upper surface of the base plate. The upper protrusion is a rectangular block structure made of medical-grade ABS plastic. The height of the upper protrusion is 80-100mm, the width is 30-40mm, and the thickness is 20-25mm. The inner sidewall of the upper protrusion is provided with a sliding groove. The sliding groove is a rectangular groove with a length of 60-80mm, a width of 10-12mm, and a depth of 5-8mm.

[0016] The telescopic rod has two ends that are slidably connected to the grooves of the upper protrusions on both sides. The telescopic rod includes a fixed section and a telescopic section. The fixed section is a hollow structure, and the telescopic section can slide through the inside of the fixed section. The outer surface of the fixed section is provided with a locking bolt, which is threaded to the fixed section. Its front end abuts against the outer surface of the telescopic section to fix the position of the telescopic section. The middle part of the telescopic rod is provided with a mounting seat. The mounting seat is a semi-circular groove structure, and its inner diameter is adapted to the outer diameter of the syringe. The inner side wall of the mounting seat is provided with a buffer pad. The buffer pad is made of medical silicone material with a thickness of 2-3mm to protect the syringe and enhance the fixation effect.

[0017] The top of the upper protrusion has a mounting surface, which is inclined at an angle of 30°-45°. Illumination lamp beads are embedded in the mounting surface. There are 4-6 LED lamp beads, which are evenly distributed on the mounting surface. The power of the lamp beads is 0.5-1W, the color temperature is 5000-6000K, and the light is soft and bright enough to illuminate the working tank area and improve the clarity of the injection field of view. The side of the upper protrusion has a control switch and a charging interface. The control switch is electrically connected to the lamp beads and is used to control the lamp beads to turn on and off. The charging interface is a USB-C interface. There is a lithium battery inside with a capacity of 1000-1500mAh to power the lamp beads.

[0018] As a further aspect of the present invention: the volume of the syringe is 5-20mL, and syringes of different volumes can be selected according to treatment needs. The outer surface of the syringe is also provided with temperature marking lines, the temperature marking lines corresponding to the range of 2-8℃, indicating the drug storage temperature.

[0019] As a further embodiment of the present invention: the piston rod is provided with reinforcing ribs, which are axially arranged strip-shaped protrusions, numbering 4-6, and evenly distributed in the circumferential direction of the rod body. The height of the reinforcing ribs is 1-1.5mm and the thickness is 0.5-0.8mm, thereby enhancing the structural strength of the piston rod and preventing bending under stress.

[0020] As a further embodiment of the present invention: the front end of the connecting cylinder of the locking member is provided with a dust cover, the dust cover is hinged to the connecting cylinder, and the dust cover is made of medical grade ABS plastic. When closed, it can cover the needle shaft of the injection needle to prevent dust contamination when not in use.

[0021] As a further aspect of the present invention: the outer surface of the needle shaft of the injection needle is provided with a lubricating coating, which is a medical-grade PTFE coating with a thickness of 0.01-0.02mm, to reduce friction during puncture and alleviate patient pain.

[0022] As a further embodiment of the present invention: the rear end of the movable sleeve is provided with a limiting ring, which is an annular protrusion integrally formed with the movable sleeve. The outer diameter of the limiting ring is larger than the outer diameter of the main body of the movable sleeve, so as to prevent the movable sleeve from slipping off the rear end of the injection cylinder.

[0023] As a further aspect of the present invention: the bottom plate of the auxiliary seat is provided with scale lines, which are set along the length and width of the working groove, with a minimum graduation value of 1mm, which facilitates the measurement of scar size.

[0024] As a further aspect of the present invention: the mounting base of the telescopic rod is provided with an elastic strap, the two ends of which are respectively fixed to the two sides of the mounting base. The elastic strap is made of medical-grade spandex, with a width of 10-15mm and a thickness of 1-1.5mm, to further fix the high-pressure injector and prevent displacement during injection.

[0025] As a further aspect of the present invention: a transparent protective cover is provided on the outside of the lighting lamp bead. The transparent protective cover is made of medical-grade PC material with a thickness of 1-1.5mm and is sealed to the mounting surface to prevent liquid from entering and damaging the lighting lamp bead.

[0026] As a further embodiment of the present invention: the upper protrusion of the auxiliary seat can slide along the length of the base plate. The base plate is provided with a strip hole, and the bottom of the upper protrusion is provided with a fixing bolt. The fixing bolt passes through the strip hole and is locked by a nut to realize the adjustment of the spacing of the upper protrusion, so as to adapt to the treatment of scars in different locations.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] High connection stability: This invention achieves a threaded connection through the connecting convex groove of the locking component and the connecting concave groove of the injection needle, and enhances the sealing performance with a sealing ring. This solves the problems of easy loosening and leakage of the needle in existing devices, ensuring a stable connection between the needle and the injection cylinder during high-pressure injection, and avoiding poor treatment effect and waste of resources caused by drug leakage.

[0029] Wide range of applications: The injection needles are available in various outer diameters and lengths, allowing for selection of the appropriate needle based on the thickness and type of scar. The injection cartridge offers multiple volume options to meet the needs of different dosage injections. The spacing between the upper protrusions on the auxiliary seat is adjustable, and the telescopic rod is extendable, making it suitable for injection treatment of scars of different sizes and locations on the human body.

[0030] Highly convenient to operate: The threaded connection structure of the locking part facilitates quick replacement and disassembly of the injection needle, making operation simple and less prone to contamination; the movable sleeve design makes it easy for medical staff to hold the syringe, and the pressure scale line on the piston rod and the volume scale line on the syringe barrel make the injection dosage and pressure control more precise; the mounting base of the auxiliary seat can fix the syringe, reduce the fatigue of medical staff in hand operation, and improve the comfort of operation.

[0031] High injection precision: The working slot of the auxiliary seat provides a stable space for injection operation, and the scale lines on the base plate can measure the size of the scar, making it easy to determine the injection site; the lighting bulb provides sufficient illumination, solving the problem of poor visibility and ensuring that the injection needle accurately punctures into the scar tissue; the height and position of the telescopic rod are adjustable, making it easy to control the injection angle and depth, ensuring that the drug is evenly distributed in the scar tissue and improving the treatment effect.

[0032] High safety: The lubricating coating on the injection needle reduces puncture pain, and the beveled design of the needle shaft reduces puncture damage; both the syringe and piston rod are made of medical-grade materials, meeting biocompatibility requirements; the sealed protection design of the illumination bulb prevents liquid from entering, improving the safety of the device; the anti-slip pad and elastic strap enhance the stability of the device, avoiding accidental injury caused by displacement during operation. Attached Figure Description

[0033] 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.

[0034] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0035] Figure 2 This is a schematic diagram of the high-pressure injector structure of the present invention.

[0036] Figure 3 This is a schematic diagram of the injection cylinder structure of the present invention.

[0037] Figure 4 This is a schematic diagram of the locking component structure of the present invention.

[0038] Figure 5 This is a cross-sectional structural diagram of the locking component of the present invention.

[0039] Figure 6 This is a schematic diagram of the multi-size injection needle structure of the present invention.

[0040] Figure 7 This is a schematic diagram of the auxiliary seat structure of the present invention.

[0041] In the diagram: 10-High-pressure injector, 20-Auxiliary seat; 101-Injection cylinder, 102-Piston rod, 103-Locking component, 104-Injection needle, 105-Modible sleeve; 111-Cylinder lug, 121-Injection nipple, 131-Connecting cylinder, 141-Connecting groove; 113-Protective groove, 123-Mounting groove, 133-Lower mounting groove, 143-Connecting groove; 114-Needle plug lug, 124-Needle rod; 201-Bottom plate, 202-Upper erector protrusion, 203-Telescopic rod, 204-Mounting surface, 205-Lighting bulb, 206-Working groove. Detailed Implementation

[0042] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "configuration" should be interpreted broadly. For example, they can refer to a fixed connection or configuration, a detachable connection or configuration, or an integral connection or configuration. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0045] Example 1

[0046] Please see Figures 1-7 In this embodiment of the invention, an intracranial injection treatment device includes a high-pressure injector 10 and an auxiliary seat 20, wherein the high-pressure injector 10 is detachably mounted on the auxiliary seat 20.

[0047] The syringe 101 of the high-pressure injector 10 has a volume of 10mL, is made of medical-grade transparent polypropylene, has a wall thickness of 1.8mm, and has a volume scale with a minimum graduation of 0.1mL and a temperature marking line of 2-8℃ on its outer surface; the injection nipple 121 at the front end of the syringe 101 is conical, and has four protective raised lines 113 on its outer surface with a spacing of 1.0mm; the two ear plates 111 at the rear end are rectangular, with a thickness of 2.2mm, a length of 18mm, a width of 9mm, and have horizontal anti-slip stripes on their outer surface.

[0048] The piston rod 102 is 35mm longer than the syringe 101 and is made of medical-grade ABS plastic. The outer diameter of the piston head at the front end is 0.03mm away from the inner diameter of the syringe 101. It is fitted with two medical-grade nitrile rubber sealing rings with a diameter of 1.8mm and a spacing of 4mm. The push handle at the rear end is circular with a diameter of 28mm and hemispherical anti-slip protrusions on the outer surface. The rod body is equipped with pressure scale lines of 0-50N, a minimum graduation value of 1N, and 6 axial reinforcing ribs with a height of 1.2mm and a thickness of 0.6mm.

[0049] The connecting cylinder 131 of the locking component 103 is made of medical-grade stainless steel with a wall thickness of 1.1mm. The connecting ridge 141 at the front end of the inner wall has a pitch of 1.1mm and a thread angle of 60°. The lower mounting groove 133 at the rear end has a depth of 0.9mm and a width of 1.1mm, and a medical-grade silicone sealing ring is embedded inside. There are 14 vertical anti-slip grooves in the middle of the outer surface. A medical-grade ABS plastic dust cover is hinged to the front end of the connecting cylinder 131.

[0050] The needle plug of the injection needle 104 is made of medical-grade stainless steel, and the connecting groove 143 of the needle plug ear plate 114 matches the connecting groove 141; the needle shaft 124 has an outer diameter of 0.5 mm, a length of 10 mm, a bevel angle of 35° at the front end, and a 0.015 mm thick medical-grade PTFE lubricating coating on its outer surface.

[0051] The movable sleeve 105 is made of medical-grade ABS plastic. The gap between the inner diameter and the outer diameter of the syringe 101 is 0.15mm. The outer surface is provided with hemispherical anti-slip protrusions with a diameter of 2mm and a spacing of 3mm. The front mounting groove 123 has a depth of 1.8mm and a width of 2.2mm. The rear end is provided with a limiting ring to prevent slippage.

[0052] The base plate 201 of the auxiliary seat 20 is made of medical-grade ABS plastic, with a length of 180mm, a width of 110mm, and a thickness of 12mm. The lower surface is provided with a 3mm thick medical silicone anti-slip pad with a diamond pattern. The middle working groove 206 is 90mm long, 55mm wide, and 12mm deep. The base plate 201 is provided with a scale line with a 1mm graduation value.

[0053] The upper protrusion 202 has a height of 90mm, a width of 35mm, a thickness of 22mm, and an inner wall groove with a length of 70mm, a width of 11mm, and a depth of 6mm. The upper protrusion 202 can slide along the length of the bottom plate 201 and is locked by fixing bolts and nuts.

[0054] The telescopic rod 203 includes a fixed section and a telescopic section. The outer surface of the fixed section is provided with locking bolts. The middle mounting seat is a semi-circular groove with a 2.5mm thick medical silicone cushioning pad on the inner side wall. The mounting seat is provided with a 12mm wide and 1.2mm thick medical-grade spandex elastic strap.

[0055] The top mounting surface 204 of the upper protrusion 202 is tilted at a 40° angle and has five 0.8W, 5500K color temperature LED lighting beads 205 embedded in it. The outer side is covered with a 1.2mm thick medical-grade PC transparent protective cover. The upper protrusion 202 has a control switch and a USB-C charging port on its side and contains a 1200mAh lithium battery.

[0056] The specific implementation method is as follows: Before use, select the appropriate size of the syringe 101, piston rod 102 and injection needle 104 according to the thickness of the scar and the required drug dosage; align the needle plug ear plate 114 of the injection needle 104 with the connecting cylinder 131 of the locking member 103, rotate the locking member 103, and through the threaded engagement of the connecting convex 141 and the connecting concave 143, firmly fix the injection needle 104 on the injection nipple 121, and ensure a seal with the sealing ring; turn on the control switch of the lighting bulb 205 of the auxiliary seat 20 and check whether the power is sufficient.

[0057] Place the patient's scar area in the working slot 206 of the auxiliary seat 20, adjust the spacing of the upper protrusions 202 according to the scar location, and lock them with fixing bolts; adjust the length and height of the telescopic rod 203, place the high-pressure injector 10 in the mounting seat, and fix it with elastic straps; medical staff hold the movable sleeve 105 and the tube ear plate 111, determine the injection site according to the scale line on the base plate 201, and under the illumination of the lighting bulb 205, accurately puncture the injection needle 104 into the scar tissue.

[0058] Pushing the handle of the piston rod 102 controls the injection pressure according to the pressure scale on the piston rod 102 and the injection dosage according to the volume scale on the syringe 101, slowly and evenly injecting the drug into the scar. After injection, rotate the locking member 103 in the opposite direction to remove the injection needle 104, turn off the lighting bulb 205, and clean and disinfect the device for later use. It should be noted that this invention is an intralesional scar injection treatment device, and all components are general standard parts or parts known to those skilled in the art. Its structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0059] Example 2

[0060] Based on the intrascar injection therapy device provided in the first embodiment of this application, the second embodiment of this application proposes another intrascar injection therapy device. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0061] Specifically, the second embodiment of this application provides a scar intra-injection treatment device in the following ways: the injection cylinder 101 has a volume of 5 mL and a wall thickness of 1.5 mm; the needle shaft 124 of the injection needle 104 has an outer diameter of 0.3 mm, a length of 5 mm, and a front end bevel angle of 30°; the base plate 201 of the auxiliary seat 20 has a length of 150 mm and a width of 100 mm, and the working groove 206 has a length of 80 mm and a width of 50 mm; the top mounting surface 204 of the upper protrusion 202 has an inclination angle of 30° and is embedded with four 0.5W, 5000K color temperature LED lighting beads 205, and has an internal lithium battery capacity of 1000mAh, which is suitable for injection treatment of superficial small-area scars.

[0062] Example 3

[0063] Based on the intrascar injection therapy device provided in the first embodiment of this application, the third embodiment of this application proposes another intrascar injection therapy device. The third embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the third embodiment will not affect the separate implementation of the first embodiment.

[0064] Specifically, the third embodiment of this application provides a scar intra-injection treatment device that differs in that the injection cylinder 101 has a volume of 20mL and a wall thickness of 2.0mm; the needle shaft 124 of the injection needle 104 has an outer diameter of 0.7mm, a length of 15mm, and a front end bevel angle of 45°; the base plate 201 of the auxiliary seat 20 has a length of 200mm and a width of 120mm, and the working groove 206 has a length of 100mm and a width of 60mm; the top mounting surface 204 of the upper protrusion 202 has an inclination angle of 45°, and is embedded with 6 1W, 6000K color temperature LED lighting beads 205, and has an internal lithium battery capacity of 1500mAh, making it suitable for injection treatment of hypertrophic large-area scars.

[0065] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0066] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An intralesional scar injection therapy device, characterized in that, Its features are: It includes a high-pressure injector (10) and an auxiliary seat (20), wherein the high-pressure injector (10) is detachably mounted on the auxiliary seat (20); The high-pressure injector (10) includes a syringe barrel (101), a piston rod (102), a locking element (103), an injection needle (104), and a movable sleeve (105). The syringe barrel (101) is a cylindrical hollow structure with openings at both ends. It is made of medical-grade transparent polypropylene with a wall thickness of 1.5-2.0 mm. The outer surface is provided with volume graduation lines along the axial direction, and the minimum graduation value of the graduation lines is 0.1 mL. The front end of the syringe barrel (101) is integrally formed with a conical injection nipple (121). The outer diameter of the injection nipple (121) increases from the point of approach to the injection point. The end of the syringe (101) gradually decreases in size from one end to the free end. The outer surface of the injection nipple (121) is provided with 3-5 rings of annular raised protective textures (113). The distance between adjacent protective textures (113) is 0.8-1.2 mm. The rear end of the syringe (101) is symmetrically provided with two rectangular plate-like tube ears (111). The thickness of the tube ears (111) is 2.0-2.5 mm, the length is 15-20 mm, and the width is 8-10 mm. The outer surface of the tube ears (111) is provided with transverse striped anti-slip textures. The spacing between the anti-slip textures is 1 mm. The piston rod (102) is slidably inserted inside the syringe (101). It is made of medical-grade ABS plastic and is 30-40 mm longer than the syringe (101). A cylindrical piston head is fixedly connected to the front end of the piston rod (102). The outer diameter of the piston head is matched with the inner diameter of the syringe (101), with a gap of 0.02-0.05 mm. Two medical-grade nitrile rubber sealing rings are fitted on the outer surface of the piston head. The sealing rings have a circular cross-section and a diameter of 1.5-2.0 mm. The distance between the two sealing rings is 3-5 mm. A circular plate-shaped push handle is provided at the rear end of the piston rod (102). The diameter of the push handle is 25-30 mm. The outer surface of the push handle has anti-slip protrusions with a diameter of 1 mm and a spacing of 2 mm. A pressure scale line with a range of 0-50 N and a minimum division value of 1 N is provided on the rod body of the piston rod (102) along the axial direction. The locking element (103) is sleeved on the injection nipple (121) and includes a cylindrical hollow connecting tube (131). The connecting tube (131) is made of medical-grade stainless steel with a wall thickness of 1.0-1.2 mm. The inner diameter of the connecting tube (131) is adapted to the maximum outer diameter of the injection nipple (121). The front end of the inner wall of the connecting tube (131) is provided with a ring-shaped threaded connecting ridge (141). The pitch of the connecting ridge (141) is 1.0-1.2 mm, and the thread angle is 60°. The inner side wall of the connecting tube (131) is provided with an annular groove-shaped lower mounting groove (133) at the rear end. The depth of the lower mounting groove (133) is 0.8-1.0mm and the width is 1.0-1.2mm. A medical silicone sealing ring is embedded in the lower mounting groove (133). The outer diameter of the sealing ring is adapted to the width of the lower mounting groove (133), and the inner diameter is tightly fitted to the outer surface of the injection nipple (121). The middle of the outer surface of the connecting tube (131) is provided with 12-16 evenly distributed vertical stripe-shaped anti-slip textures. The injection needle (104) includes a needle plug and a needle rod (124). The needle plug is a cylindrical structure made of medical grade stainless steel. The rear end of the needle plug is provided with a needle plug ear plate (114) with an annular protrusion structure. The outer diameter of the needle plug ear plate (114) is adapted to the inner diameter of the connecting tube (131). The outer surface of the needle plug ear plate (114) is provided with a connecting groove (143) with an annular thread structure that matches the connecting groove (141). The front end of the needle plug is integrally formed with the hollow needle rod (124). The needle rod (124) is made of medical grade stainless steel. The outer diameter of the needle rod (124) is provided with five specifications: 0.3mm, 0.4mm, 0.5mm, 0.6mm, and 0.7mm. The corresponding lengths are 5mm, 8mm, 10mm, 12mm, and 15mm, respectively. The front end of the needle rod (124) is a 30°-45° beveled surface. The movable sleeve (105) is fitted onto the outer surface of the syringe (101). It is a cylindrical hollow structure made of medical-grade ABS plastic. The inner diameter of the movable sleeve (105) is matched with the outer diameter of the syringe (101), with a gap of 0.1-0.2mm. The movable sleeve (105) can slide along the axial direction of the syringe (101). The outer surface of the movable sleeve (105) is provided with hemispherical anti-slip protrusions with a diameter of 2mm and a spacing of 3mm. The front end of the movable sleeve (105) is provided with an annular groove-shaped mounting groove (123). The depth of the mounting groove (123) is 1.5-2.0mm and the width is 2.0-2.5mm. The auxiliary seat (20) includes a base plate (201), an upper protrusion (202), and a telescopic rod (203). The base plate (201) is a rectangular plate structure made of medical-grade ABS plastic. The base plate (201) is 150-200mm long, 100-120mm wide, and 10-15mm thick. The lower surface of the base plate (201) is provided with a 2-3mm thick medical silicone anti-slip pad. The lower surface of the anti-slip pad is provided with a diamond-shaped anti-slip pattern. A rectangular groove-shaped working groove (206) is opened in the middle of the base plate (201). The working groove (206) is 80-100mm long, 50-60mm wide, and 10-15mm deep. The upper protrusion (202) is fixedly installed on both sides of the upper surface of the base plate (201). It is a rectangular block structure made of medical-grade ABS plastic. The height of the upper protrusion (202) is 80-100mm, the width is 30-40mm, and the thickness is 20-25mm. The inner wall of the upper protrusion (202) is provided with a rectangular groove. The length of the groove is 60-80mm, the width is 10-12mm, and the depth is 5-8mm. The two ends of the telescopic rod (203) are respectively slidably connected to the grooves of the upper protrusions (202) on both sides. The telescopic rod (203) includes a fixed section and a telescopic section. The fixed section is a hollow structure. The telescopic section can slide through the fixed section. The outer surface of the fixed section is provided with locking bolts. The locking bolts are threadedly connected to the fixed section, and their front ends abut against the telescopic section. The outer surface of the telescopic rod (203) has a semi-circular groove structure mounting seat in the middle. The inner diameter of the mounting seat is adapted to the outer diameter of the syringe (101). The inner side wall of the mounting seat is provided with a 2-3mm thick medical silicone material buffer pad. The top of the upper protrusion (202) is provided with a 30°-45° inclined mounting surface (204). 4-6 evenly distributed LED lighting beads (205) are embedded in the mounting surface (204). The power of the lighting beads (205) is 0.5-1W and the color temperature is 5000-6000K. The side of the upper protrusion (202) is provided with a control switch and a USB-C charging interface. The interior is provided with a 1000-1500mAh lithium battery. The control switch is electrically connected to the lighting beads (205), and the lithium battery powers the lighting beads (205).

2. The intralesional injection therapy device according to claim 1, characterized in that: The syringe (101) has a volume of 5-20 mL, and the outer surface of the syringe (101) is also provided with a temperature marking line in the range of 2-8℃ to indicate the drug storage temperature.

3. The intralesional injection therapy device according to claim 1, characterized in that: The piston rod (102) has 4-6 axial strip-shaped reinforcing ribs evenly distributed in the circumferential direction of the rod body. The height of the reinforcing ribs is 1-1.5mm and the thickness is 0.5-0.8mm, which are used to enhance the structural strength of the piston rod (102).

4. The intralesional injection therapy device according to claim 1, characterized in that: The front end of the connecting tube (131) of the locking member (103) is hinged with a dust cover made of medical-grade ABS plastic. When the dust cover is closed, it can cover the needle shaft (124) of the injection needle (104) to prevent dust contamination.

5. The intralesional injection therapy device according to claim 1, characterized in that: The needle shaft (124) of the injection needle (104) has a 0.01-0.02mm thick medical-grade PTFE lubricating coating on its outer surface to reduce friction during puncture.

6. The intralesional injection therapy device according to claim 1, characterized in that: The rear end of the movable sleeve (105) is provided with a limiting ring. The limiting ring is an annular protrusion integrally formed with the movable sleeve (105). The outer diameter of the limiting ring is larger than the outer diameter of the main body of the movable sleeve (105) to prevent the movable sleeve (105) from slipping off the rear end of the injection cylinder (101).

7. The intralesional injection therapy device according to claim 1, characterized in that: The auxiliary seat (20) has a base plate (201) with scale lines distributed along the length and width of the working groove (206). The minimum division value of the scale lines is 1 mm, which is used to measure the size of the scar.

8. The intralesional injection therapy device according to claim 1, characterized in that: The mounting base of the telescopic rod (203) is provided with an elastic strap. The two ends of the elastic strap are fixed to the two sides of the mounting base respectively. The elastic strap is made of medical grade spandex, with a width of 10-15mm and a thickness of 1-1.5mm, and is used to further fix the high-pressure injector (10).

9. The intralesional injection therapy device according to claim 1, characterized in that: The outer side of the lighting bead (205) is provided with a transparent protective cover made of medical grade PC material. The thickness of the transparent protective cover is 1-1.5mm. It is sealed to the mounting surface (204) to prevent liquid from entering and damaging the lighting bead (205).

10. The intralesional injection therapy device according to claim 1, characterized in that: The upper protrusion (202) of the auxiliary seat (20) can slide along the length of the base plate (201). The base plate (201) is provided with a strip hole, and the bottom of the upper protrusion (202) is provided with a fixing bolt. The fixing bolt passes through the strip hole and is locked by a nut to realize the adjustment of the spacing of the upper protrusion (202).

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