Needleless injector and method of use

Abstract

The present application relates to the technical field of syringes, in particular to a needle-free emitter and a use method, comprising a needle-free emitter, which comprises a needle-free pre-filled medicine core for delivering medicine liquid and a retreat-stop structure for limiting the needle-free pre-filled medicine core; the retreat-stop structure is used for locking the needle-free pre-filled medicine core with the needle-free emitter, preventing the needle-free pre-filled medicine core from rotating when being disassembled; wherein when the needle-free pre-filled medicine core needs to be removed, the locking of the needle-free pre-filled medicine core is released by operating an unlocking mechanism on the retreat-stop structure. The present application has the beneficial effects that the pre-filled emitter can minimize the medicine liquid residue, and the dosage of medicine is more accurate; the operation is convenient and the medicine drawing is not complicated; the needle-free injection can have the advantages of small wound, no pain, high absorption efficiency, avoiding fear of needles, etc.; and various retreat-stop structures improve the stability and easy operability of different specifications of needle-free pre-filled medicine cores in the use process.

Description

Technical Field

[0001] This invention relates to the field of syringe technology, and in particular to a needleless launcher and its method of use. Background Technology

[0002] In the medical field, precise drug delivery is crucial for treatment effectiveness. Traditional drug delivery methods usually involve using syringes with needles. This method not only requires professional operation but also carries certain risks, such as needlestick injuries, cross-contamination, and patient anxiety. In addition, traditional injection methods may lead to inaccurate dosage or waste of medication due to the transfer process.

[0003] In recent years, with the advancement of technology, needle-free injection technology has received widespread attention as a new drug delivery method. A needle-free injection system typically includes a pre-filled drug container (i.e., a needle-free pre-filled drug core) and a launcher for spraying the drug at high speed under the skin (i.e., a needle-free launcher). This system aims to simplify the drug delivery process, improve the safety and convenience of medication, and reduce patient discomfort.

[0004] However, due to its design, traditional pre-filled syringes often leave a certain amount of medication residue inside the container after use. This not only wastes drug resources but may also lead to inaccurate dosage. Summary of the Invention

[0005] In this section, as well as in the abstract and title of this application, some simplifications or omissions may be made to avoid obscuring the purpose of this section, the abstract, and the title of this application, and such simplifications or omissions shall not be used to limit the scope of the invention.

[0006] The purpose of this invention is to provide a needle-free transmitter.

[0007] Therefore, its purpose is to solve the problem that a certain amount of liquid medicine often remains inside the container after use.

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a needleless transmitter, comprising a needleless pre-filled drug core for delivering liquid medication and a stop structure for limiting the needleless pre-filled drug core; the stop structure is used to lock the needleless pre-filled drug core to the needleless transmitter to prevent the needleless pre-filled drug core from rotating during disassembly; wherein, when it is necessary to remove the needleless pre-filled drug core, the locking of the needleless pre-filled drug core is released by operating the unlocking mechanism on the stop structure.

[0009] As a preferred embodiment of the needleless transmitter of the present invention, the needleless transmitter includes: a power spring for providing power for injecting the drug solution; a tension wrench for manually loading the power spring; an unlock button for keeping the needleless transmitter in a locked state before use, and unlocking it by pressing the unlock button during use; a firing button for triggering the injection process; and a striking rod disposed inside the needleless transmitter. When the firing button is pressed, the striking rod moves and contacts the push rod inside the needleless pre-filled drug core, pushing the drug solution through the needleless nozzle into the skin.

[0010] As a preferred embodiment of the needleless transmitter of the present invention, the needleless pre-filled drug core is designed with a concave front end; the needleless pre-filled drug core includes: a conical plug, the conical design of which closely fits the concave front end of the needleless pre-filled drug core to improve sealing performance; a drug tube for storing drug liquid; a rubber stopper for sealing the tail of the drug tube; and a push rod for pushing the drug liquid through the micropore.

[0011] As a preferred embodiment of the needleless emitter of the present invention, the needleless pre-filled drug core has an injection orifice at its front end. The injection orifice extends backward from the front end and the inner diameter of the injection orifice gradually decreases linearly from 4.65 mm at its widest point to 0.1 mm at the tip of the front end.

[0012] As a preferred embodiment of the needleless launcher of the present invention, the anti-reverse structure includes a gear anti-reverse component, which is disposed at the rear end of the needleless pre-filled drug core. The gear anti-reverse component connects the needleless pre-filled drug core to the needleless launcher and is used to prevent the needleless pre-filled drug core from rotating in the reverse direction during the removal of the plug. The needleless transmitter is equipped with an unlocking slider. When the needleless pre-filled drug core needs to be removed, the unlocking slider moves backward to disengage the gear stop, allowing the needleless pre-filled drug core to be removed from the needleless transmitter.

[0013] As a preferred embodiment of the needleless launcher of the present invention, the anti-retraction structure further includes a sliding claw structure, the sliding claw structure including a sliding sleeve and a connecting part; the front end of the sliding sleeve is provided with a groove block with a slope, and the connecting part is provided with at least three sliders. When the medicine tube is inserted into the sliding sleeve, the sliders on the connecting part slide along the slope at the front end of the groove block and finally embed into the groove. Under the action of the spring, the sliders tightly hold the medicine tube. When it is necessary to disassemble the medicine tube, the sliding sleeve is pushed forward, the ramp on the groove block contacts the ramp on the slider, the slider is lifted, and the tight grip on the medicine tube is released.

[0014] In a preferred embodiment of the needleless transmitter of the present invention, the anti-reverse structure further includes a quick-insertion claw anti-reverse structure, which includes a rear end boss and a transmitter connector. The transmitter connector has a first groove that matches the rear end boss. The needleless pre-filled cartridge can be quickly inserted into the transmitter connector through the rear end boss, and by rotating the needleless pre-filled cartridge, the rear end boss enters the first groove of the transmitter connector, preventing the needleless pre-filled cartridge from reversing when the conical plug is unscrewed.

[0015] In a preferred embodiment of the needleless transmitter of the present invention, the anti-reverse structure further includes a hard-limit anti-reverse structure, which includes an external threaded boss. The transmitter connector has a second groove that matches the external threaded boss. The needleless pre-filled core can be quickly inserted into the transmitter connector through the external threaded boss, and the external threaded boss is limited by rotating the needleless pre-filled core in the forward direction to enter the second groove of the transmitter connector, thus preventing the needleless pre-filled core from reversing when the conical plug is unscrewed. When it is necessary to remove the needleless pre-filled medication core, the external tooth boss is disengaged from the second groove and broken by rotating the needleless pre-filled medication core in the opposite direction, thereby achieving rapid removal of the needleless pre-filled medication core.

[0016] In a preferred embodiment of the needleless launcher of the present invention, the elastic claw structure includes an elastic claw disposed at the front end of the launcher connector, and the rear end of the needleless pre-filled cartridge can be inserted into the elastic claw; the rear end of the needleless pre-filled cartridge is provided with wing-like structures on both sides, and the elastic claw is provided with third grooves on both sides that match the needleless pre-filled cartridge; the needleless pre-filled cartridge can be quickly inserted into the elastic claw through its rear end, and the insertion into the elastic claw through the wing-like structures achieves limiting; preventing the needleless pre-filled cartridge from reversing when the conical plug is unscrewed; and when it is necessary to remove the needleless pre-filled cartridge, the elastic claw is unlocked by sliding the outer shell of the launcher connector backward, thereby realizing the quick removal of the needleless pre-filled cartridge.

[0017] To solve the above-mentioned technical problems, the present invention also provides the following technical solution: a method for drug injection using a needle-free emitter, comprising the aforementioned needle-free emitter, and... Insert the needle-free pre-filled medication cartridge into the front end of the needle-free transmitter, ensuring the cartridge is properly secured; manually apply the power spring using a tension wrench; align the front end of the needle-free transmitter with the patient's injection site; press the unlock button to release the needle-free transmitter from its locked state; after injection, manually apply the power spring to reset; slide the unlock slider on the needle-free pre-filled medication cartridge backward to disengage it from the needle-free transmitter; remove the used needle-free pre-filled medication cartridge and dispose of it properly; prepare a new needle-free pre-filled medication cartridge for future use.

[0018] The beneficial effects of the needleless emitter of the present invention are as follows: The pre-filled needleless emitter has the following advantages: Pre-filled injectors minimize drug residue, ensuring more accurate dosage; they prevent staff from injuring themselves or causing inaccurate dosages during drug preparation, and reduce the chance of medication errors; pre-filled drugs can be injected directly by simply removing the plug, eliminating cross-contamination and ensuring safe injection as air does not come into contact with the drug; patients with chronic diseases can self-administer medication at home; and they are easy to handle, store, and transport, effectively reducing costs.

[0019] Needle-free pre-filled drug cores have the following advantages: they avoid the cumbersome process of drug extraction and are easy to operate; they can also combine the advantages of needle-free injection, such as small incision, painlessness, high absorption efficiency, and avoidance of needle phobia; during needle-free injection, the pre-filled core is propelled by high pressure from the transmitter, so the resistance requirement of the rubber stopper is not high, and ordinary pre-filled rubber stoppers can be used, avoiding silicone oil contamination.

[0020] The various thrust structures of needle-free pre-filled drug cartridges have the following advantages: to ensure the stability and ease of operation of needle-free pre-filled drug cartridges of different specifications during use, while also increasing the reliability of the entire device and the convenience of user operation.

[0021] Currently, there are no relevant products or mature technologies for needle-free pre-filled syringes in China, nor are there any standardized products for needle-free pre-filled syringes. The combination of needle-free pre-filling and needle-free launchers is a new type of drug injection method that reduces operation steps and eliminates the pain and infection risks associated with traditional needles. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a schematic diagram of the overall structure of the needleless transmitter in this invention.

[0023] Figure 2 This is a cross-sectional view of the needleless emitter in this invention.

[0024] Figure 3 This is a schematic cross-sectional view of the needleless pre-filled drug core of the needleless transmitter in this invention.

[0025] Figure 4 This is a cross-sectional view of the gear anti-reverse component of the needleless launcher in this invention.

[0026] Figure 5 This is a three-dimensional structural diagram of the sliding claw structure of the needleless launcher in this invention.

[0027] Figure 6 This is a cross-sectional view of the sliding claw structure of the needleless launcher in this invention.

[0028] Figure 7 This is a three-dimensional cross-sectional view of the quick-release claw anti-retraction structure of the needleless transmitter in this invention.

[0029] Figure 8 This is a three-dimensional structural diagram of the hard-limiting anti-reverse structure of the needleless emitter in this invention.

[0030] Figure 9 This is a three-dimensional cross-sectional view of the elastic claw structure of the needleless launcher in this invention.

[0031] In the picture: 100. Needleless launcher; 101. Power spring; 102. Tension wrench; 103. Unlock button; 104. Firing button; 105. Strike bar; 200. Needle-free pre-filled drug core; 201. Conical plug; 202. Drug tube; 203. Rubber stopper; 204. Push rod; 205. Injection orifice diameter; 300. Gear anti-reverse component; 301. Unlocking slider; 400. Sliding claw structure; 401. Sliding sleeve; 402. Connecting part; 403. Groove block; 404. Slider; 405. Spring; 500. Quick-release pawl anti-reverse structure; 501. Rear end boss; 502. Transmitter connector; 503. First groove; 600. Hard limit stop structure; 601. External thread boss; 602. Second groove; 700, Flexible claw structure; 701, Flexible claw; 702, Wing-shaped structure; 703, Third groove; 704, Outer shell. Detailed Implementation

[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0034] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0035] Example 1 Reference Figure 1-3 This is the first embodiment of the present invention, which provides a needleless transmitter 100, including a needleless pre-filled drug core 200 for delivering liquid medication and a stop structure for limiting the needleless pre-filled drug core 200; the stop structure is used to lock the needleless pre-filled drug core 200 to the needleless transmitter 100 to prevent the needleless pre-filled drug core 200 from rotating during disassembly; wherein, when it is necessary to remove the needleless pre-filled drug core 200, the locking of the needleless pre-filled drug core 200 is released by operating the unlocking mechanism on the stop structure.

[0036] In this embodiment, when the user prepares to use the needle-free emitter 100, they first insert the needle-free pre-filled medication core 200 into the needle-free emitter 100. At this time, the anti-retraction structure automatically activates, firmly fixing the needle-free pre-filled medication core 200 in place to prevent it from rotating or falling off. Next, the user holds the unlock button 103 and then presses the firing button 104. The striking rod 105 in the needle-free emitter 100 strikes the push rod 204 of the needle-free pre-filled medication core 200, injecting the medication. This forces the medication to be sprayed at high speed through the tiny opening at the front end of the needle-free pre-filled medication core 200 onto the skin. The medication penetrates the stratum corneum, forming tiny channels to enter the subcutaneous tissue, achieving rapid absorption.

[0037] The needleless transmitter 100 includes: a power spring 101 for providing power to inject the drug solution; a tension wrench 102 for manually loading the power spring 101; a front end of the needleless transmitter 100 for receiving and securing the needleless pre-filled drug core 200 to be injected; an unlock button 103 for keeping the needleless transmitter 100 locked before use and unlocking it by pressing the unlock button 103 during use; a firing button 104 for triggering the injection process; and a striking rod 105 located inside the needleless transmitter 100. When the firing button 104 is pressed, the striking rod 105 moves and contacts the push rod 204 inside the needleless pre-filled drug core 200, pushing the drug solution through the needleless nozzle into the skin. The needle-free pre-filled drug core 200 has a concave front end. The needle-free pre-filled drug core 200 includes: a conical plug 201, whose conical front end fits tightly against the concave front end of the needle-free pre-filled drug core 200 to improve sealing performance; a drug tube 202 for storing the drug solution; a rubber stopper 203 for sealing the tail of the drug tube 202; and a push rod 204 for pushing the drug solution through the micropore.

[0038] In this embodiment, the power spring 101 provides the instantaneous high pressure required to propel the drug through the skin. The power spring 101 is designed to have sufficient elasticity and strength to release a large amount of energy in a short time. The tension wrench 102 is used to manually load the power spring 101, ensuring a consistent energy input before each injection. This manual loading method not only simplifies the operation process but also avoids the potential malfunction risks associated with electronic devices, making the injection process more reliable.

[0039] In this embodiment, the power spring 101 of the needleless emitter 100 can be adjusted according to different drug types and dosage requirements. The spring 405 can be designed as a multi-section detachable module, allowing users to replace spring 405 modules of different hardness or length to adapt to different injection needs.

[0040] The needle-free pre-filled drug core 200 has a concave design at the front end, which fits tightly with the conical plug 201 at the front end of the needle-free pre-filled drug core 200 to prevent drug leakage and ensure that the pressure during injection can be effectively transmitted to the drug.

[0041] The unlock button 103 is designed to prevent accidental injections when the user is not ready, thus increasing safety during use. The user only presses the unlock button 103 when ready to inject, forcing confirmation of their action and reducing the risk of misoperation. The trigger button 104 serves as the point of contact for the actual injection, allowing the user to complete the injection process easily and naturally.

[0042] The striking rod 105 is a key component connecting the energy output of the power spring 101 to the push rod 204 inside the needleless pre-filled medication cartridge 200. When the firing button 104 is pressed, the striking rod 105 moves forward rapidly, contacting the push rod 204 inside the needleless pre-filled medication cartridge 200, thereby propelling the medication through the needleless nozzle into the skin. This ensures that the medication is quickly and evenly distributed into the skin tissue. Furthermore, the conical plug 201 helps maintain the stability of the medication before injection, ensuring smooth flow.

[0043] The needle-free pre-filled drug core 200 has an injection orifice 205 at its front end. The injection orifice 205 extends backward from the front end and its inner diameter gradually decreases linearly from 4.65 mm at its widest point to 0.1 mm at the tip of the front end.

[0044] In this embodiment, the position of the injection orifice 205 at the front end of the needle-free pre-filled drug core 200 is crucial for ensuring accurate drug delivery to the target tissue. The orifice in this design extends from the front end to the rear, with a gradual decrease in diameter, which facilitates uniform drug distribution. The wider orifice portion can hold more drug and ensure sufficient pressure buildup; while the gradually narrowing portion helps form a stable jet, allowing the drug to penetrate the skin surface and enter subcutaneous or muscle tissue without a needle. This positional relationship optimizes drug delivery efficiency and reduces patient discomfort caused by needle insertion.

[0045] Example 2 Reference Figure 4 This is the second embodiment of the present invention. Unlike the previous embodiment, due to the different specifications of the needle-free pre-filled drug core 200, the needle-free pre-filled drug core 200 structure has multiple anti-reverse mechanisms. By installing different anti-reverse mechanisms on the needle-free transmitter 100, the needle-free transmitter 100 can effectively limit the connection of the needle-free pre-filled drug core 200. The anti-reverse structure includes a gear anti-reverse component 300, which is disposed at the rear end of the needle-free pre-filled drug core 200. The gear anti-reverse component 300 connects the needle-free pre-filled drug core 200 to the needle-free transmitter 100 and is used to prevent the needle-free pre-filled drug core 200 from rotating in the opposite direction during the removal of the conical plug 201; wherein, The needleless transmitter 100 has a sliding unlock slider 301. When it is necessary to remove the needleless pre-filled cartridge 200, the unlocking slider 301 moves backward to disengage the gear stop 300, allowing the needleless pre-filled cartridge 200 to be removed from the needleless transmitter 100.

[0046] In this embodiment, the gear anti-reverse component 300 is located at the rear end of the needle-free pre-filled drug core 200. Its main function is to prevent the needle-free pre-filled drug core 200 from rotating in the reverse direction during the removal of the conical plug 201. This ensures that the needle-free pre-filled drug core 200 maintains a stable position during the preparation stage, even if an unexpected torsional force is applied during operation, thereby avoiding the risk of drug leakage or damage to the needle-free pre-filled drug core 200.

[0047] Specifically: The gear anti-reverse component 300 is fixed to the rear end of the needleless pre-filled cartridge 200 and engages with the unlocking slider 301. When the needleless pre-filled cartridge 200 is inserted into the needleless transmitter 100, the gear anti-reverse component 300 automatically engages with the unlocking slider 301, forming a mechanical locking mechanism to ensure that the needleless pre-filled cartridge 200 will not rotate due to external torque before use.

[0048] When it is necessary to remove the needle-free pre-filled cartridge 200, the user can manually push the unlocking slider 301 backward to disengage the gear stop 300 from the unlocking slider 301 inside the needle-free transmitter 100. At this time, the needle-free pre-filled cartridge 200 can be smoothly removed from the needle-free transmitter 100 for replacement.

[0049] To ensure user safety, the design of the gear stop 300 and the unlocking slider 301 must take into account the possibility of accidental operation. For example, the unlocking slider 301 may require a certain amount of pushing force to move, or its position may be designed to be relatively concealed to reduce accidental unlocking caused by accidental contact.

[0050] The gear stop 300 and the unlocking slider 301 should be made of durable materials to ensure good performance even after repeated use. Furthermore, considering the special nature of medical devices, all materials must meet biocompatibility and non-toxicity requirements.

[0051] Reference Figure 5-6 The anti-retraction structure also includes a sliding claw structure 400, which includes a sliding sleeve 401 and a connecting part 402. The front end of the sliding sleeve 401 is provided with a groove block 403 with a slope, and the connecting part 402 is provided with at least three sliders 404. When the medicine tube 202 is inserted into the sliding sleeve 401, the sliders 404 on the connecting part 402 slide along the slope at the front end of the groove block 403 and finally embed into the groove. Under the action of the spring 405, the sliders 404 tightly hold the medicine tube 202. When it is necessary to remove the medicine tube 202, the sliding sleeve 401 is pushed forward, and the slope on the groove block 403 contacts the slope on the slider 404, lifting the slider 404 and releasing the tight hold on the medicine tube 202.

[0052] In another embodiment, a highly efficient and safe solution for securing and removing the medication tube 202 is provided, particularly when used in medical devices. This ensures that the medication tube 202 will not accidentally detach during use, while allowing for convenient and quick replacement or removal when necessary. Automatic locking and manual unlocking are achieved by utilizing the inclined plane principle in the sliding claw structure 400.

[0053] As the basic component of the entire structure, the sliding sleeve 401 has a groove 403 with a ramp at its front end, which is used to guide the slider 404 on the connecting part 402 into the relative position. The inside of the sliding sleeve 401 provides a space for the medicine tube 202, and the movement of the slider 404 is controlled by the groove 403 with the ramp.

[0054] When the medicine tube 202 is inserted, the slider 404 is forced to move outward until the medicine tube 202 is fully inserted. Then, under the force of the spring 405, the slider 404 moves inward and gets into the groove on the outside of the medicine tube 202, thus tightly holding the medicine tube 202.

[0055] Spring 405 provides continuous inward pressure, allowing slider 404 to hold the tube 202 firmly without external force. The spring constant of spring 405 needs to be selected according to the actual application to ensure that it is neither too tight and damaging to the tube 202, nor too loose and resulting in an unstable fixation.

[0056] Work process: When the medicine tube 202 is inserted into the sliding sleeve 401, the slider 404 is first subjected to pressure from the medicine tube 202, and is forced to move outward to overcome the resistance of the spring 405 until the medicine tube 202 is fully inserted. At this time, the slider 404 automatically returns to its original position under the elastic force of the spring 405 and is embedded in the groove on the outside of the medicine tube 202, thus securing the medicine tube 202.

[0057] To disassemble the medicine tube 202, the operator needs to push the sliding sleeve 401 forward (i.e., towards the medicine tube 202). At this time, the groove block 403 with the ramp will contact the slider 404, lifting the slider 404, releasing the tight grip on the medicine tube 202, and the medicine tube 202 can be easily pulled out.

[0058] Reference Figure 2 and Figure 7 The anti-reverse structure also includes a quick-insertion claw anti-reverse structure 500, which includes a rear end boss 501. The transmitter connector 502 has a first groove 503 that matches the rear end boss 501. The needleless pre-filled cartridge 200 can be quickly inserted into the transmitter connector 502 through the rear end boss 501, and by rotating the needleless pre-filled cartridge 200, the rear end boss 501 enters the first groove 503 of the transmitter connector 502, preventing the needleless pre-filled cartridge 200 from reversing when the conical plug 201 is unscrewed.

[0059] In another embodiment, the user first aligns the rear end boss 501 of the needleless pre-filled drug core 200 with the inlet of the transmitter connector 502 and pushes it in smoothly to achieve initial docking. Then, the user gently rotates the needleless pre-filled drug core 200 until obvious resistance is felt, indicating that the rear end boss 501 has been fully embedded in the first groove 503 and has achieved a backlash prevention effect. The transmitter connector 502 is connected to the needleless transmitter 100 to enable normal driving use of the needleless pre-filled drug core 200.

[0060] To remove the needleless pre-filled cartridge 200 from the transmitter connector 502, the user needs to rotate it in the opposite direction at a certain angle to unlock it, and then pull it outward to easily separate the two.

[0061] Example 3 Reference Figure 2 and Figure 8This is the third embodiment of the present invention, which further provides a needleless transmitter 100. The anti-reverse structure also includes a hard limiting anti-reverse structure 600, which includes an external threaded boss 601. The transmitter connector 502 has a second groove 602 that matches the external threaded boss 601. The needleless pre-filled cartridge 200 can be quickly inserted into the transmitter connector 502 through the external threaded boss 601, and the external threaded boss 601 is limited by rotating the needleless pre-filled cartridge 200 in the forward direction into the second groove 602 of the transmitter connector 502, preventing the cartridge from reversing when the conical plug 201 is unscrewed. When it is necessary to remove the needleless pre-filled cartridge 200, the external threaded boss 601 is disengaged from the second groove 602 and broken by rotating the needleless pre-filled cartridge 200 in the reverse direction, thereby achieving quick removal of the needleless pre-filled cartridge 200.

[0062] In another embodiment, after the needleless pre-filled medication core 200 is inserted, rotating the needleless pre-filled medication core 200 can cause the external tooth boss 601 to be embedded in the second groove 602, thereby achieving mechanical locking.

[0063] The locking state is released by breaking the external tooth boss 601 through reverse rotation. The fracture design of the external tooth boss 601 ensures that the needleless pre-filled drug core 200 or the transmitter connector 502 will not be damaged even when excessive torque is applied. The transmitter connector 502 is connected to the needleless transmitter 100 to enable normal driving use of the needleless pre-filled drug core 200.

[0064] The user first aligns the needleless pre-filled cartridge 200 with the inlet of the transmitter connector 502, and then gently pushes it in until the external threaded boss 601 enters the second groove 602. Then, the user rotates the needleless pre-filled cartridge 200 clockwise until a noticeable resistance is felt, indicating that the needleless pre-filled cartridge 200 has been securely locked. When the needleless pre-filled cartridge 200 needs to be replaced, the user rotates the needleless pre-filled cartridge 200 counterclockwise until the external threaded boss 601 exits from the second groove 602 and triggers the breakage mechanism. At this point, the needleless pre-filled cartridge 200 can be easily pulled out.

[0065] Reference Figure 2 and Figure 9The elastic claw structure 700 includes an elastic claw 701 disposed at the front end of the transmitter connector 502. The transmitter connector 502 is connected to the needleless transmitter 100 to enable normal driving of the needleless pre-filled drug core 200. The rear end of the needleless pre-filled drug core 200 can be inserted into the elastic claw 701. Wing-shaped structures 702 are provided on both sides of the rear end of the needleless pre-filled drug core 200, and the elastic claw 701 has third grooves on both sides that match the needleless pre-filled drug core 200. 703; The needleless pre-filled cartridge 200 can be quickly inserted into the elastic claw 701 through its rear end, and is limited by the wing-shaped structure 702 inserted into the elastic claw 701; preventing the needleless pre-filled cartridge 200 from reversing when the conical plug 201 is unscrewed; and when it is necessary to remove the needleless pre-filled cartridge 200, the elastic claw 701 is unlocked by sliding the outer shell 704 of the transmitter connector 502 backward, thereby realizing the quick removal of the needleless pre-filled cartridge 200.

[0066] In another embodiment, the elastic claw 701 assembly is made of a material with certain elastic properties, typically a polymer, to facilitate the insertion of the needle-free pre-filled drug core 200.

[0067] Align the needleless pre-filled drug core 200 with the opening of the elastic claw 701, and push the rear end of the needleless pre-filled drug core 200 into the elastic claw 701. At this time, the elastic claw 701 will expand due to compression. After the needleless pre-filled drug core 200 is fully inserted, the elastic claw 701 returns to its original shape and is embedded in the third groove 703 to form a physical lock. The wing-shaped structure 702 is inserted into the elastic claw structure 700 to limit the movement and prevent the needleless pre-filled drug core 200 from reversing when the conical plug 201 is unscrewed.

[0068] Slide the outer shell 704 of the transmitter connector 502 backward. This action will cause the elastic claw 701 to move, releasing the lock on the needleless pre-filled cartridge 200. Pull out the needleless pre-filled cartridge 200 to complete the disassembly.

[0069] A method for drug injection using a needleless transmitter involves inserting a pre-filled needleless drug core 200 containing the drug into the front end of the needleless transmitter 100 and ensuring its proper fixation through a locking structure. A tension wrench 102 is used to manually load a power spring 101 to provide the necessary energy for the injection process. The front end of the needleless transmitter 100 is aligned with the patient's injection site, and the unlock button 103 is pressed to release the locked state of the needleless transmitter 100. At this point, the needleless injector is manually triggered, using the previously loaded power to inject. After the injection is completed, the power spring 101 is manually loaded and returned to its initial position for the next use. By sliding the unlocking slider 301 on the needleless pre-filled medication cartridge 200 backward, it is separated from the needleless injector 100. The used needleless pre-filled medication cartridge 200 is removed and disposed of in accordance with medical waste management regulations, preparing a new needleless pre-filled medication cartridge 200 for the next use. Since there is no needle piercing the skin, the patient will not feel the stinging pain of traditional injections, avoiding the needle prick injury that may be caused by the use of needles, reducing the occupational risks for medical workers. Some studies have shown that needleless injection can improve the absorption rate and efficacy of certain drugs, and the disposable needleless injector 100 can reduce the risk of cross-infection caused by reusing needles.

[0070] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0071] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0072] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0073] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A needle-free emitter, characterized in that: include, The needleless transmitter (100) includes a needleless pre-filled drug cartridge (200) for delivering liquid medication and a backstop structure for limiting the needleless pre-filled drug cartridge (200); The anti-reverse structure is used to lock the needleless pre-filled drug core (200) and the needleless transmitter (100) in a locked engagement to prevent the needleless pre-filled drug core (200) from rotating during disassembly; When it is necessary to remove the needle-free pre-filled drug core (200), the locking of the needle-free pre-filled drug core (200) is released by operating the unlocking mechanism on the anti-reverse structure; The needleless emitter (100) includes: A power spring (101) is used to provide power for injecting the drug solution; A tension wrench (102) is used to manually load the power spring (101). The unlock button (103) is used to keep the needleless transmitter (100) locked before use and to unlock it by pressing the unlock button (103) during use. The trigger button (104) is used to trigger the injection process; The striking rod (105) is located inside the needleless transmitter (100). When the firing button (104) is pressed, the striking rod (105) moves and contacts the push rod (204) inside the needleless pre-filled drug core (200), pushing the drug liquid through the needleless nozzle to be injected into the skin. The front end of the needle-free pre-filled drug core (200) is designed to be concave. The needle-free pre-filled medication core (200) includes: The conical plug (201) has a conical front end that fits tightly against the concave front end of the needleless pre-filled drug core (200) to improve sealing performance; Medicine tube (202), used to store medicine liquid; A rubber stopper (203) is used to seal the tail of the medicine tube (202); The push rod (204) is used to push the liquid medicine through the micropores; The anti-reverse structure includes a gear anti-reverse component (300), which is disposed at the rear end of the needleless pre-filled drug core (200). The gear anti-reverse component (300) connects the needleless pre-filled drug core (200) to the needleless transmitter (100) to prevent the needleless pre-filled drug core (200) from rotating in the reverse direction during the removal of the plug. The needleless transmitter (100) is slidably provided with an unlocking slider (301). When it is necessary to remove the needleless pre-filled drug core (200), the unlocking slider (301) moves backward to disengage the gear stop (300), allowing the needleless pre-filled drug core (200) to be taken out from the needleless transmitter (100).

2. The needleless emitter as described in claim 1, characterized in that: The needle-free pre-filled drug core (200) has an injection orifice (205) at its front end. The injection orifice (205) extends backward from the front end and the inner diameter of the injection orifice (205) gradually decreases linearly from 4.65 mm at its widest point to 0.1 mm at the tip of the front end.

3. A needle-free emitter, characterized in that: Includes a needleless transmitter (100), which includes a needleless pre-filled drug core (200) for delivering the drug solution and a backstop structure for limiting the needleless pre-filled drug core (200); The anti-reverse structure is used to lock the needleless pre-filled drug core (200) and the needleless transmitter (100) in a locked engagement to prevent the needleless pre-filled drug core (200) from rotating during disassembly; When it is necessary to remove the needle-free pre-filled drug core (200), the locking of the needle-free pre-filled drug core (200) is released by operating the unlocking mechanism on the anti-reverse structure; The needleless emitter (100) includes: A power spring (101) is used to provide power for injecting the drug solution; A tension wrench (102) is used to manually load the power spring (101). The unlock button (103) is used to keep the needleless transmitter (100) locked before use and to unlock it by pressing the unlock button (103) during use. The trigger button (104) is used to trigger the injection process; The striking rod (105) is located inside the needleless transmitter (100). When the firing button (104) is pressed, the striking rod (105) moves and contacts the push rod (204) inside the needleless pre-filled drug core (200), pushing the drug liquid through the needleless nozzle to be injected into the skin. The front end of the needle-free pre-filled drug core (200) is designed to be concave. The needle-free pre-filled medication core (200) includes: The conical plug (201) has a conical front end that fits tightly against the concave front end of the needleless pre-filled drug core (200) to improve sealing performance; Medicine tube (202), used to store medicine liquid; A rubber stopper (203) is used to seal the tail of the medicine tube (202); The push rod (204) is used to push the liquid medicine through the micropores; The anti-reverse structure also includes a sliding claw structure (400), which includes a sliding sleeve (401) and a connecting part (402). The front end of the sliding sleeve (401) is provided with a groove block (403) with a slope, and the connecting part (402) is provided with at least three sliders (404). When the medicine tube (202) is inserted into the sliding sleeve (401), the sliders (404) on the connecting part (402) slide along the slope at the front end of the groove block (403) and finally embed into the groove. Under the action of the spring (405), the sliders (404) tightly hold the medicine tube (202). When it is necessary to disassemble the medicine tube (202), push the sliding sleeve (401) forward, and the ramp on the groove block (403) contacts the ramp on the slider (404), lifting the slider (404) and releasing the tight grip on the medicine tube (202).

4. A needle-free emitter, characterized in that: Includes a needleless transmitter (100), which includes a needleless pre-filled drug core (200) for delivering the drug solution and a backstop structure for limiting the needleless pre-filled drug core (200); The anti-reverse structure is used to lock the needleless pre-filled drug core (200) and the needleless transmitter (100) in a locked engagement to prevent the needleless pre-filled drug core (200) from rotating during disassembly; When it is necessary to remove the needle-free pre-filled drug core (200), the locking of the needle-free pre-filled drug core (200) is released by operating the unlocking mechanism on the anti-reverse structure; The needleless emitter (100) includes: A power spring (101) is used to provide power for injecting the drug solution; A tension wrench (102) is used to manually load the power spring (101). The unlock button (103) is used to keep the needleless transmitter (100) locked before use and to unlock it by pressing the unlock button (103) during use. The trigger button (104) is used to trigger the injection process; The striking rod (105) is located inside the needleless transmitter (100). When the firing button (104) is pressed, the striking rod (105) moves and contacts the push rod (204) inside the needleless pre-filled drug core (200), pushing the drug liquid through the needleless nozzle to be injected into the skin. The front end of the needle-free pre-filled drug core (200) is designed to be concave. The needle-free pre-filled medication core (200) includes: The conical plug (201) has a conical front end that fits tightly against the concave front end of the needleless pre-filled drug core (200) to improve sealing performance; Medicine tube (202), used to store medicine liquid; A rubber stopper (203) is used to seal the tail of the medicine tube (202); The push rod (204) is used to push the liquid medicine through the micropores; The anti-reverse structure also includes a quick-connect claw anti-reverse structure (500), which includes a rear end boss (501) and a transmitter connector (502). The transmitter connector (502) has a first groove (503) that matches the rear end boss (501). The needleless pre-filled cartridge (200) can be quickly inserted into the transmitter connector (502) through the rear end boss (501), and by rotating the needleless pre-filled cartridge (200), the rear end boss (501) enters the first groove (503) of the transmitter connector (502), preventing the needleless pre-filled cartridge (200) from reversing when the conical plug (201) is unscrewed. The anti-reverse structure also includes a hard-limit anti-reverse structure (600), which includes an external threaded boss (601). The transmitter connector (502) has a second groove (602) that matches the external threaded boss (601). The needleless pre-filled cartridge (200) can be quickly inserted into the transmitter connector (502) through the external threaded boss (601), and the external threaded boss (601) is limited by rotating the needleless pre-filled cartridge (200) in the forward direction into the second groove (602) of the transmitter connector (502), thus preventing the needleless pre-filled cartridge (200) from reversing when the conical plug (201) is unscrewed. When it is necessary to remove the needleless pre-filled medication core (200), the external tooth boss (601) is disengaged from the second groove (602) and broken by rotating the needleless pre-filled medication core (200) in the opposite direction, thereby realizing the rapid removal of the needleless pre-filled medication core (200).

5. The needleless emitter as described in claim 4, characterized in that: The elastic claw structure (700) includes an elastic claw (701) disposed at the front end of the transmitter connector (502), and the rear end of the needleless pre-filled drug core (200) can be inserted into the elastic claw (701); the rear end of the needleless pre-filled drug core (200) is provided with wing-shaped structures (702) on both sides, and the elastic claw (701) is provided with third grooves (703) on both sides that match the needleless pre-filled drug core (200); the needleless pre-filled drug core (200) can pass through Its rear end is quickly inserted into the elastic claw (701), and the wing structure (702) is inserted into the elastic claw (701) to achieve a limit; to prevent the needleless pre-filled drug core (200) from reversing when the conical plug (201) is unscrewed; and when the needleless pre-filled drug core (200) needs to be removed, the elastic claw (701) is unlocked by sliding the outer shell (704) of the transmitter connector (502) backward, thereby realizing the quick removal of the needleless pre-filled drug core (200).

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