Needleless injector device capable of preventing injection jitter and achieving fractional injection
By introducing a push motor and injection screw into the needle-free injector, the problems of injection jitter and multiple injections are solved, enabling stable drug injection and multiple uses.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2026-04-14
AI Technical Summary
Existing needle-free injectors are prone to shaking during injection, which can lead to drug leakage or injection site deviation, and cannot achieve multiple injections.
By employing a combination of a drive motor and an injection screw, the motor's driving force replaces the traditional spring force, and combined with the screw's transmission, stable injection and multi-stage injection are achieved.
It effectively prevents injection jerking, avoids drug leakage and injection position deviation, enables drug to be injected in multiple doses, and improves ease of use.
Smart Images
Figure CN224113083U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a needleless injector device that can prevent injection jitter and inject in stages, belonging to the field of needleless injectors. Background Technology
[0002] Traditionally, medications were injected using needles. However, with advancements in medical technology, needle-free injectors have gradually replaced needle-based injections.
[0003] Compared with traditional syringes, needle-free injection systems have the advantages of eliminating injection pain, eliminating needle puncture accidents, eliminating cross-infection, and preventing the formation of induration, redness, swelling and bruising, and ulceration, thus effectively reducing patient suffering.
[0004] However, conventional needle-free injectors require the entire medication to be injected at once after drawing up the medication. Moreover, the spring force at the start of the injection can cause injection jitter, resulting in medication leakage or misalignment of the injection site, which adds many difficulties for patients. Summary of the Invention
[0005] Based on the problems described in the background, the present invention aims to solve the following problem: providing a needle-free injector device that can prevent injection jitter and allow for multiple injections. By incorporating a drive motor and an injection screw, it addresses the aforementioned issues of inability to perform multiple injections and the occurrence of drug leakage or injection position deviation due to jitter during injection.
[0006] To achieve the above objectives, this utility model provides the following technical solution: A needle-free injector device capable of preventing injection jitter and performing fractional injections is provided, comprising a reset motor, a reset screw, a reset block, a slider, a trigger, a slider positioning groove, a hammer, a hammer spring, an injection motor, an injection screw, a frame, and a sliding sleeve. The output end of the reset motor is connected to the reset screw, and the end of the reset screw not connected to the reset motor extends into the slider. A reset block is threaded onto the reset screw and is also located within the slider. One side of the output end of the reset motor is mounted on one side of the frame, and the slider is located inside the side of the frame connected to the reset motor. The slider positioning groove is formed on the slider away from the reset motor. At the side end, the trigger is mounted on the frame and passes through the upper end face of the frame, extending into the slider and engaging with the slider positioning groove on the slider. The sliding sleeve is mounted inside the frame with its front end extending out of the frame. The hammer is mounted inside the frame and close to the outer perimeter of the frame, with its tail end connected to the end of the slider away from the reset motor. The head of the hammer is slidably mounted inside the sliding sleeve. One end of the hammer spring is mounted on the tail of the hammer, and the other end of the hammer spring is fixed to a baffle inside the frame. The injection motor is fixed inside the frame and located above the hammer. The output end of the injection motor is connected to an injection screw, which is threaded into the upper protruding part of the sliding sleeve.
[0007] Preferably, the front end of the sliding sleeve is also equipped with an ampoule and a core rod during injection. One end of the core rod is inserted into the ampoule, and the end of the ampoule into which the core rod is inserted is connected and installed at the front end of the sliding sleeve. At this time, the core rod is located inside the sliding sleeve.
[0008] Preferably, the reset block is also equipped with a flow regulation module, which is also located inside the slider.
[0009] Preferably, a spring is provided at the interaction position between the trigger and the frame, and a groove is also provided on the outer wall of the frame at this position. One end of the spring is connected to the lower end of the flat cover of the trigger, and the other end of the spring is connected to the groove of the frame.
[0010] The beneficial effects of this utility model are:
[0011] 1. During injection, the traditional spring force is transformed into the driving force of the injection motor. The drug is injected under the driving force of the injection motor. Since the driving force of the injection motor 11 is balanced and transmitted through the screw, injection vibration can be prevented, avoiding situations such as drug leakage or injection position deviation.
[0012] 2. Because the driving force during injection is generated by the injection motor, it can be controlled multiple times to complete the drug injection in stages, which is beneficial to drug utilization and actual operation.
[0013] 3. The overall structure is simple, easy to assemble, and convenient to operate. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model;
[0015] Figure 2 This is a schematic diagram of the structure of the present invention under the compressed state during use;
[0016] Figure 3 This is a schematic diagram of the structure of the present invention in its reset state during use;
[0017] Figure 4 This is a schematic diagram of the structure of the present invention in the excited state during use;
[0018] Figure 5 This is a schematic diagram of the structure of the present invention in the injection state during use;
[0019] In the diagram: 1 is the reset motor; 2 is the reset screw; 3 is the reset block; 4 is the slider; 5 is the trigger; 6 is the slider positioning groove; 7 is the hammer; 8 is the hammer spring; 9 is the ampoule; 10 is the core rod; 11 is the injection motor; 12 is the injection screw; 13 is the frame; 14 is the sliding sleeve; 15 is the flow regulation module. Detailed Implementation
[0020] The embodiments of this utility model will be further described below with reference to the accompanying drawings:
[0021] Example 1
[0022] like Figure 1 As shown, this utility model includes a needle-free injector device that can prevent injection jitter and perform fractional injections. It includes a reset motor 1, a reset screw 2, a reset block 3, a slider 4, a trigger 5, a slider positioning groove 6, a hammer 7, a hammer spring 8, an injection motor 11, an injection screw 12, a frame 13, and a sliding sleeve 14. The output end of the reset motor 1 is connected to the reset screw 2. The end of the reset screw 2 not connected to the reset motor 1 extends into the slider 4. The reset block 3 is threaded onto the reset screw 2 and is also located within the slider 4. One side of the output end of the reset motor 1 is mounted on one side of the frame 13. The slider 4 is located inside the side of the frame 13 connected to the reset motor 1. The slider positioning groove 6 is located at the end of the slider 4 away from the reset motor 1. The trigger 5 is mounted on... The slide sleeve 14 is installed inside the frame 13 and extends into the slide block 4, where it engages with the slide block positioning groove 6. The front end of the slide sleeve 14 extends out of the frame 13. The hammer 7 is installed inside the frame 13 and close to the periphery of the frame 13. The tail end of the hammer 7 is connected to the end of the slide block 4 away from the reset motor 1. The head of the hammer 7 is slidably installed inside the slide sleeve 14. One end of the hammer spring 8 is installed at the tail end of the hammer 7, and the other end of the hammer spring 8 is fixed to the baffle inside the frame 13. The injection motor 11 is fixed inside the frame 13 and located above the hammer 7. The output end of the injection motor 11 is connected to the injection screw 12, and the injection screw 12 is threadedly engaged with the upper protruding part of the slide sleeve 14.
[0023] To facilitate drug injection, the front end of the sliding sleeve 14 is also equipped with an ampoule 9 and a core rod 10 during injection. One end of the core rod 10 is inserted into the ampoule 9, and the end of the ampoule 9 connected to the core rod 10 is connected and installed at the front end of the sliding sleeve 14. At this time, the core rod 10 is located inside the sliding sleeve 14.
[0024] To adjust the stroke and facilitate increasing or decreasing the injection volume, a flow regulation module 15 is also installed on the reset block 3, which is also located inside the slider 4.
[0025] To facilitate trigger reset and not affect normal use, a spring is provided at the interaction position between trigger 5 and frame 13, and a groove is also provided on the outer wall of frame 13 at this position. One end of the spring is connected to the lower end of the flat cover of trigger 5, and the other end of the spring is connected to the groove of frame 13.
[0026] Workflow:
[0027] like Figure 2As shown, the present invention first needs to be clamped. The reset motor 1 rotates in the forward direction, driving the reset screw 2 to rotate. The reset block 3 moves to the right under the drive of the reset screw, and at the same time pulls the slider 4 to move to the right, stopping at the rightmost side of the frame 13. During the movement of the slider 4 to the right, the hammer 7 and the hammer spring 8 are driven to move to the right simultaneously. When the slider 4 moves to the right until the slider positioning groove 6 reaches the position of the trigger 5, the trigger 5 moves upward under the action of the spring, so that the lower end of the trigger 5 falls into the slider positioning groove 6. At this time, the trigger 5 locks the movement of the slider 4, the hammer 7, and the hammer spring 8.
[0028] like Figure 3 As shown, a reset operation is performed on this utility model. The reset motor 1 drives the reset screw 2 to rotate in the opposite direction, pushing the reset block 3 to the left, leaving space for the slider 4 to be ejected to the left; then the ampoule 9 filled with medicine and the core rod 10 are installed together into the center hole of the sliding sleeve 14.
[0029] like Figure 4 As shown, to activate this utility model, the trigger 5 is pressed, and the lower end of the trigger 5 disengages from the slider positioning groove 6, releasing its lock with the slider 4, hammer 7, and hammer spring 8. Under the elastic force of the hammer spring 8, the slider 4 and hammer 7 are activated and move to the left. The left end of the hammer 7 pushes the core rod 10 to move to the left in the inner cavity of the ampoule 9, compressing the liquid medicine in the ampoule 9 and starting to inject until the slider 4 stops moving under the obstruction of the reset block 3, which also stops the hammer 7.
[0030] like Figure 5 As shown, when performing the injection operation of this utility model, the injection motor 11 drives the injection screw 12 to rotate, pushing the sliding sleeve 14 to move to the right, thereby driving the ampoule 9 to move to the right. At this time, the left end of the hammer 7 continues to push the core rod 10 to inject the medicine.
[0031] In this process, the injection power is converted from spring force to the driving force of the injection motor, under which the drug solution is injected. Since the driving force of the injection motor 11 is balanced, injection jitter can be prevented, and the drug solution can also be injected in multiple stages by controlling the injection motor 11.
[0032] After injection, the sliding sleeve of this utility model is reset, the injection motor 11 rotates in the opposite direction, driving the sliding sleeve 14 to reset, and the ampoule 9 and core rod 10 are removed by rotation, completing one use.
Claims
1. A needle-free injector device capable of preventing injection jitter and performing fractional injections, characterized in that, The assembly includes a reset motor (1), a reset screw (2), a reset block (3), a slider (4), a trigger (5), a slider positioning groove (6), a hammer (7), a hammer spring (8), an injection motor (11), an injection screw (12), a frame (13), and a sliding sleeve (14). The output end of the reset motor (1) is connected to the reset screw (2). The end of the reset screw (2) not connected to the reset motor (1) extends into the slider (4). The reset screw (2) is threaded with a reset block (3), which is also located inside the slider (4). One side of the output end of the reset motor (1) is mounted on one side of the frame (13). The slider (4) is located inside the side of the frame (13) connected to the reset motor (1). The slider positioning groove (6) is opened at the end of the slider (4) away from the reset motor (1). The trigger (5) is mounted on the frame (13) and passes through the frame (13). The upper end face extends into the slider (4) and cooperates with the slider positioning groove (6) on the slider (4). The sliding sleeve (14) is installed inside the frame (13) and the front end of the sliding sleeve (14) extends out of the frame (13). The hammer (7) is installed inside the frame (13) and close to the periphery of the frame (13). The tail end of the hammer (7) is connected to the end of the slider (4) away from the reset motor (1). The head of the hammer (7) is slidably installed in the sliding sleeve (14). One end of the hammer spring (8) is installed at the tail of the hammer (7). The other end of the hammer spring (8) is fixed on the baffle inside the frame (13). The injection motor (11) is fixed inside the frame (13) and located above the hammer (7). The output end of the injection motor (11) is connected to the injection screw (12). At the same time, the injection screw (12) is threadedly engaged with the upper protruding part of the sliding sleeve (14).
2. The needleless injector device according to claim 1, characterized in that, During injection, the front end of the sliding sleeve (14) is also equipped with an ampoule (9) and a core rod (10). One end of the core rod (10) is inserted into the ampoule (9), and the end of the ampoule (9) into which the core rod (10) is inserted is connected and installed at the front end of the sliding sleeve (14). At this time, the core rod (10) is located inside the sliding sleeve (14).
3. The needleless injector device according to claim 1, characterized in that, The reset block (3) is also equipped with a flow regulation module (15), which is also located inside the slider (4).
4. The needleless injector device according to claim 1, characterized in that, A spring is provided at the interaction position between the trigger (5) and the frame (13), and a groove is also provided on the outer wall of the frame (13) at this position. One end of the spring is connected to the lower end of the flat cover of the trigger (5), and the other end of the spring is connected to the groove of the frame (13).