Needleless injector

Abstract

The utility model provides a needleless injector which comprises an injector body, a pipe cavity extending in the preset direction is formed in the injector body, and an injection opening is formed in the injector body; the injection push rod is installed in the pipe cavity, and the injection push rod is movably arranged in the preset direction; the elastic component is matched with the injection push rod, the elastic component has a force storage state and a release state, and when the elastic component is switched from the force storage state to the release state, the elastic component drives the injection push rod to move towards the injection port; the eccentric component is rotatably installed on the injector body, the eccentric component is in transmission fit with the injection push rod, when the eccentric component rotates, the eccentric component drives the injection push rod to move in the direction away from the injection opening, and when the eccentric component rotates to a preset angle, the eccentric component releases the injection push rod. The needleless injector provided by the embodiment of the utility model solves the technical problem that the structure of a needleless injector in the prior art is too complicated.

Description

Technical Field

[0001] The utility model relates to the field of medical supplies, in particular to a needle-free syringe. Background Art

[0002] Needle-free injection is a new injection technology that achieves the purpose of drug injection without needle puncture. It can reduce the pain and fear of users during drug injection, reduce the risk of bacterial infection, and avoid accidents such as needle scratches and breakage. Needle-free injection has many advantages such as fast drug absorption, no subcutaneous nodules after long-term use, and high injection efficiency, and thus has broad application prospects in future clinical medicine.

[0003] The structure of the needle-free syringe in the related art is usually complicated, which will bring a series of shortcomings, such as increased cost, poor structural reliability, cumbersome and time-consuming operation, etc., which have an adverse impact on the promotion and application of needle-free syringes.

[0004] It can be seen that the needle-free syringe in the related art has a technical problem of overly complex structure, which has an adverse effect on its use. No effective solution has been proposed to this technical problem. Utility Model Content

[0005] The main purpose of the utility model is to provide a needle-free syringe to solve the technical problem that the structure of the needle-free syringe in the related art is too complicated.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a needle-free syringe, comprising: a syringe body, a lumen extending along a preset direction is provided inside the syringe body, an injection port is provided on the syringe body, and the injection port connects the lumen with the external space of the syringe body; an injection push rod, the injection push rod is installed in the lumen, and the injection push rod is movably arranged along the preset direction to drive the liquid in the lumen to be ejected through the injection port; an elastic component, the elastic component cooperates with the injection push rod, the elastic component has a power storage state and a release state, and when the elastic component switches from the power storage state to the release state, the elastic component drives the injection push rod to move toward the injection port; an eccentric component, the eccentric component is rotatably installed on the syringe body, the eccentric component is in transmission cooperation with the injection push rod, when the eccentric component rotates, the eccentric component drives the injection push rod to move in a direction away from the injection port, and when the eccentric component rotates to a preset angle, the eccentric component releases the injection push rod, so that the injection push rod moves toward the injection port under the driving action of the elastic component.

[0007] Furthermore, the eccentric component is a crankshaft or a cam.

[0008] Furthermore, a liquid medicine inlet is provided on the syringe body, and the liquid medicine inlet is communicated with the lumen. The needle-free syringe also includes a one-way valve, and the one-way valve is communicated with the liquid medicine inlet.

[0009] Furthermore, the needle-free syringe includes a container having a containing cavity for storing liquid medicine, the container is connected to a one-way valve, and when the injection push rod moves away from the injection port, the liquid medicine in the container flows into the lumen through the one-way valve under the action of the pressure difference.

[0010] Furthermore, the needle-free injector comprises an elastic force adjusting component, and the elastic force adjusting component is used to adjust the elastic force of the elastic component.

[0011] Furthermore, the elastic force adjustment component is installed on the syringe body, and the elastic force adjustment component is adjustably arranged along a preset direction. One end of the elastic component cooperates with the injection push rod, and the other end of the elastic component cooperates with the elastic force adjustment component.

[0012] Furthermore, the elastic component is a spring, a spring mounting cavity is provided in the syringe body, and the spring is installed in the spring mounting cavity. The needle-free syringe also includes a spring seat, which is detachably mounted on one end of the spring mounting cavity so that the spring can be limited in the spring mounting cavity through the spring seat, wherein a through hole extending in a preset direction is provided on the spring seat, and the elastic force adjustment component is installed in the through hole, one end of the spring abuts against the injection push rod, and the other end of the spring abuts against the elastic force adjustment component.

[0013] Furthermore, one or more protrusions are provided on the injection push rod, and a guide groove corresponding to the position of the protrusion is provided on the syringe body. The guide groove extends along a preset direction, and the protrusion is slidably arranged in the guide groove along the preset direction.

[0014] Furthermore, the needle-free syringe includes: a motor assembly, a power output shaft of the motor assembly is connected to the eccentric component to drive the eccentric component to rotate; an operating component, the operating component is communicatively connected to the motor assembly to control the working state of the motor assembly by operating the operating component.

[0015] Furthermore, the needle-free syringe includes a suction cup structure, which is arranged on the syringe body and around the injection port.

[0016] The needle-free syringe using the technical solution of the utility model comprises: a syringe body, wherein a lumen extending in a preset direction is provided inside the syringe body, and an injection port is provided on the syringe body, and the injection port connects the lumen with the external space of the syringe body; an injection push rod, which is installed in the lumen and movably arranged in a preset direction to drive the liquid in the lumen to be ejected through the injection port; an elastic component, which cooperates with the injection push rod, and the elastic component has a power storage state and a release state, and when the elastic component switches from the power storage state to the release state, the elastic component drives the injection push rod to move toward the injection port; an eccentric component, which is rotatably installed on the syringe body, and the eccentric component is in transmission cooperation with the injection push rod, and when the eccentric component rotates, the eccentric component drives the injection push rod to move in a direction away from the injection port, and when the eccentric component rotates to a preset angle, the eccentric component releases the injection push rod, so that the injection push rod moves toward the injection port under the driving action of the elastic component. The needle-free syringe adopting this structural design is provided with an elastic component and an eccentric component. When the eccentric component rotates, the injection push rod can be driven to move in a direction away from the injection port under its eccentric action. At this time, the elastic component gradually accumulates force and finally switches to the accumulation state. When the eccentric component rotates to a preset angle, the eccentric component releases the injection push rod, and the system is excited by the high deviation state. Therefore, the elastic component switches from the accumulation state to the release state. At this time, it drives the injection push rod to move toward the injection port, and the injection push rod drives the liquid medicine in the lumen to be ejected through the injection port. After adopting this structural design, the energy storage and excitation of the needle-free syringe can be realized by the rotation of the eccentric component. When the eccentric component rotates continuously, the entire needle-free syringe can be cyclically stored and excited to realize the injection of the liquid medicine. Compared with the needle-free syringe in the related art, the needle-free syringe in the embodiment of the utility model effectively simplifies the structure of the needle-free syringe on the basis of ensuring the normal injection function, which is conducive to reducing the cost and operation reliability of the needle-free syringe, and solves the technical problem that the structure of the needle-free syringe in the related art is too complicated. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 It is a cross-sectional structural schematic diagram of the first embodiment of the needle-free syringe of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the first embodiment of the needle-free syringe of the utility model;

[0020] Figure 3It is a structural schematic diagram of a second embodiment of the needle-free syringe of the utility model;

[0021] Figure 4 It is a schematic structural diagram of an embodiment of the needle-free syringe of the utility model at a preset small viewing angle.

[0022] The above drawings include the following reference numerals:

[0023] 1. Syringe body; 10. Tube cavity; 11. Injection port; 12. Spring mounting cavity; 13. Guide groove; 2. Injection push rod; 21. Protrusion; 3. Elastic component; 4. Eccentric component; 5. One-way valve; 6. Container; 7. Elastic force adjustment component; 8. Spring seat; 9. Motor assembly; 91. Motor body; 92. Speed ​​change gear set. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] Please refer to Figures 1 to 4 The utility model provides a needle-free syringe, comprising: a syringe body 1, wherein a lumen 10 extending in a preset direction is provided inside the syringe body 1, and an injection port 11 is provided on the syringe body 1, and the injection port 11 connects the lumen 10 with the external space of the syringe body 1; an injection push rod 2, which is installed in the lumen 10 and is movably arranged in a preset direction to drive the liquid medicine in the lumen 10 to be ejected through the injection port 11; an elastic component 3, which cooperates with the injection push rod 2, and the elastic component 3 has a power storage state and a power storage state. Release state, when the elastic component 3 switches from the stored force state to the released state, the elastic component 3 drives the injection push rod 2 to move toward the injection port 11; the eccentric component 4, the eccentric component 4 is rotatably mounted on the syringe body 1, and the eccentric component 4 is in transmission cooperation with the injection push rod 2. When the eccentric component 4 rotates, the eccentric component 4 drives the injection push rod 2 to move away from the injection port 11. When the eccentric component 4 rotates to a preset angle, the eccentric component 4 releases the injection push rod 2, so that the injection push rod 2 moves toward the injection port 11 under the driving action of the elastic component 3.

[0026] The needle-free syringe adopting this structural design is provided with an elastic component 3 and an eccentric component 4. When the eccentric component 4 rotates, it can drive the injection push rod 2 to move in the direction away from the injection port 11 under its eccentric action. At this time, the elastic component 3 gradually accumulates force and finally switches to the force accumulation state. When the eccentric component 4 rotates to a preset angle, the eccentric component 4 releases the injection push rod 2, and the system is stimulated by the high-position state of the deviation. Therefore, the elastic component 3 will switch from the force accumulation state to the release state. At this time, it will drive the injection push rod 2 to move toward the injection port 11, and the injection push rod 2 will drive the liquid in the lumen 10 to be ejected through the injection port 11. After adopting this structural design, the needle-free syringe can be stored and stimulated by the rotation of the eccentric component 4. When the eccentric component 4 rotates continuously, the entire needle-free syringe can be cyclically stored and stimulated to achieve injection of liquid medicine. Compared with the needle-free syringe in the related art, the needle-free syringe in the embodiment of the utility model effectively simplifies the structure of the needle-free syringe while ensuring the normal injection function, which is beneficial to reducing the cost and operational reliability of the needle-free syringe, and solves the technical problem of the overly complex structure of the needle-free syringe in the related art.

[0027] The cooperation between the elastic component 3 and the injection push rod 2 may refer to the two being connected to each other or abutting against each other, as long as the power transmission can be achieved so that the elastic component 3 drives the injection push rod 2 to move in a preset direction.

[0028] In order to better achieve the injection of liquid medicine, in this embodiment, the injection push rod 2 includes a push rod body and a sealing component, the sealing component is installed on the push rod body, and the sealing component is sealed with the inner wall of the lumen 10, so that when the injection push rod 2 moves along the lumen 10, the sealing component can prevent the liquid medicine from leaking through the gap between the injection push rod 2 and the inner wall of the lumen 10, ensuring that the liquid medicine can be ejected through the injection port 11 at a higher pressure. In a preferred embodiment, the sealing component is a sealing ring, and the injection push rod 2 is provided with a mounting groove arranged around it, and the sealing ring is embedded in the mounting groove. In this embodiment, in order to achieve smooth cooperation between the elastic component 3 and the injection push rod 2, the injection push rod 2 includes a push rod seat, which is connected to the push rod body and is located at one end of the push rod body close to the elastic component 3, and the push rod seat cooperates with the elastic component 3.

[0029] Optionally, the eccentric component 4 is a crankshaft or a cam. The eccentric component 4 and the injection push rod 2 are in transmission cooperation, that is, the two can transmit the force, so that the eccentric component 4 can smoothly drive the injection push rod 2 to move, thereby realizing the accumulation and excitation of force. In specific implementation, the two can be directly connected or indirectly connected and transmitted through other intermediate transition structures.

[0030] In actual implementation, as long as the eccentric component 4 is an eccentric structure and can smoothly realize the energy storage and activation of the needle-free syringe when it rotates, it can be used. For example, the eccentric component 4 of the needle-free syringe is a cam, a crankshaft, etc., and the specific shapes of the cam and the crankshaft can also be varied. Figure 1 and Figure 2 As shown, in this embodiment, the eccentric component 4 is a cam, specifically, the eccentric component 4 is an eccentric wheel, which has a smoothly transitioned arc surface and a sudden fault area. When the arc surface rotates in coordination with the injection push rod 2, the injection push rod 2 will be driven to move smoothly away from the injection port 11, so that the elastic component 3 stores energy. When it rotates to the sudden position, the injection push rod 2 will be released instantly, so that under the driving action of the elastic component 3, the injection push rod 2 moves toward the injection port 11 to achieve the injection of the liquid medicine. For another example Figure 3 As shown, in the present embodiment, the eccentric component 4 is a cam, which includes a central axis and a protrusion arranged on the side wall of the central axis. When the cam rotates, the injection push rod 2 can be moved in a direction away from the injection port 11 through the protrusion. When the cam rotates to a certain angle, the protrusion is out of contact with the injection push rod 2, and the injection push rod 2 is released instantly, so that under the driving action of the elastic component 3, the injection push rod 2 moves toward the injection port 11 to achieve the injection of the liquid medicine.

[0031] The syringe body 1 is provided with a liquid medicine inlet, which is communicated with the lumen 10 . The needle-free syringe further comprises a one-way valve 5 , which is communicated with the liquid medicine inlet.

[0032] By setting a liquid medicine inlet on the syringe body 1 and setting a one-way valve 5 connected thereto, during the reciprocating motion of the injection push rod 2 in a preset direction, there will be a pressure change in the lumen 10. When the injection push rod 2 moves in a direction away from the injection port 11, the pressure in the lumen 10 decreases. Under the action of the pressure difference, the external liquid medicine can be sucked into the lumen 10 through the one-way valve 5 to achieve the replenishment of the liquid medicine. When the injection push rod 2 moves toward the injection port 11, the pressure in the lumen 10 increases, and the one-way valve 5 can only conduct in one direction, so the liquid medicine cannot flow out through the one-way valve 5 and can only be sprayed out through the injection port 11, thereby achieving liquid medicine injection. In this way, the liquid medicine can be automatically replenished during the entire energy storage and excitation process without affecting the injection of the liquid medicine.

[0033] like Figures 1 to 4 As shown, the needle-free syringe includes a container 6 having a containing cavity for storing liquid medicine. The container 6 is connected to a one-way valve 5. When the injection push rod 2 moves away from the injection port 11, the liquid medicine in the container 6 flows to the lumen 10 through the one-way valve 5 under the action of the pressure difference.

[0034] In this embodiment, the needle-free syringe is designed with a container 6, through which the drug solution can be stored, so as to achieve timely replenishment of the drug solution. In specific implementation, the container 6 can be directly connected to the one-way valve 5, or connected to the one-way valve 5 through a catheter structure. Figures 1 to 4 As shown, the container 6 in this embodiment is connected to the one-way valve 5 through a conduit.

[0035] Preferably, the needle-free injector comprises an elastic force adjusting component 7 , and the elastic force adjusting component 7 is used to adjust the elastic force of the elastic component 3 .

[0036] In a specific embodiment, the elastic force adjustment component 7 is installed on the syringe body 1, and the elastic force adjustment component 7 is adjustably arranged along a preset direction. One end of the elastic component 3 cooperates with the injection push rod 2, and the other end of the elastic component 3 cooperates with the elastic force adjustment component 7.

[0037] Of course, this is only an optional embodiment of the elastic force adjustment component 7. For example, in the embodiment, the elastic component 3 is a spring, one end of the spring is in contact with the injection push rod 2, and the other end of the spring is in contact with the elastic force adjustment component 7. The elastic force adjustment component 7 can be a stud installed on the syringe body 1. By adjusting its screw-in depth, the pressure on the elastic component 3 can be adjusted, thereby achieving the effect of adjusting the elastic force of the elastic component 3. In actual implementation, the elastic force adjustment component 7 can also have other structural forms. For example, the syringe body 1 is provided with a plurality of slots arranged in sequence along a preset direction, and the elastic force adjustment component 7 is inserted into different slots to achieve position adjustment along the preset direction. For another example, in an optional embodiment, the elastic component 3 is a tension spring or an elastic band, one end of the tension spring or the elastic band is connected to the injection push rod 2, and the other end is connected to the elastic force adjustment component 7. The elastic force adjustment component 7 is a rotatable structure. When it rotates, a part of the tension spring or the elastic band can be wound around it, thereby changing the length of the tension spring or the elastic band, thereby playing the role of adjusting the elastic force of the elastic component 3.

[0038] In a specific embodiment, the elastic component 3 is a spring, a spring mounting cavity 12 is provided in the syringe body 1, and the spring is installed in the spring mounting cavity 12. The needle-free syringe also includes a spring seat 8, which is detachably mounted on one end of the spring mounting cavity 12 to limit the spring in the spring mounting cavity 12 through the spring seat 8, wherein a through hole extending in a preset direction is provided on the spring seat 8, and the elastic force adjustment component 7 is installed in the through hole, one end of the spring abuts against the injection push rod 2, and the other end of the spring abuts against the elastic force adjustment component 7.

[0039] Preferably, the injection push rod 2 is provided with one or more protrusions 21, and the syringe body 1 is provided with a guide groove 13 corresponding to the position of the protrusion 21. The guide groove 13 extends along a preset direction, and the protrusion 21 is slidably arranged in the guide groove 13 along the preset direction.

[0040] like Figures 1 to 3 As shown, by designing the protrusion 21 and the guide groove 13, the movement of the injection push rod 2 in a preset direction can be guided, which is beneficial to ensure that the needle-free injector can store energy and activate more smoothly and reduce the risk of the needle-free injector getting stuck.

[0041] In one embodiment, the needle-free injector includes: a motor assembly 9, the power output shaft of the motor assembly 9 is connected to the eccentric component 4 to drive the eccentric component 4 to rotate; an operating component, the operating component is connected to the motor assembly 9 in communication, so as to control the working state of the motor assembly 9 by operating the operating component. The operating component is a component used to realize the operation control of the motor assembly 9, such as an operation button, an operation trigger, and the like. The controllable motor assembly 9 may include but is not limited to: start, stop, speed, number of rotations, working time, and the like.

[0042] In this embodiment, the motor assembly 9 includes a motor body 91 and a speed gear set 92 , the output shaft of the motor body 91 is connected to the power input shaft of the speed gear set 92 , and the output end of the speed gear set 92 is connected to the eccentric component 4 .

[0043] Furthermore, the needle-free syringe includes a suction cup structure, which is arranged on the syringe body 1 and around the injection port 11. When in use, the existence of the suction cup structure can make the needle-free syringe contact with the skin more closely, and during the reciprocating motion of the injection push rod 2, the suction cup structure can provide a certain suction force, thereby helping the skin to stretch and relax, which is beneficial to the diffusion and absorption of the drug solution.

[0044] The use of the needle-free syringe of the utility model is described below with a specific embodiment:

[0045] When performing an injection, the patient's injection site and the surrounding area are first disinfected; then the suction cup structure is combined with the syringe body 1, and the syringe is held by hand so that the suction cup structure is buckled on the body surface outside the injection site, and it is ensured that the syringe body 1 finally touches the injection site, and the operating component (such as a trigger) is driven, and the motor assembly 9 drives the eccentric component 4 to rotate, thereby driving the injection push rod 2 to move backward. At this time, the pressure in the lumen 10 is reduced, and the liquid medicine in the container 6 is sucked into the lumen 10 through the one-way valve 5. The suction cup structure achieves the best adsorption of the body surface, and therefore the injection port 11 will be in close contact with the skin; the needle-free syringe is held by hand and slightly moved outward, so that the tissue at the injection site tends to During relaxation, the operating component is driven to activate the needle-free syringe, and the injection push rod 2 moves toward the injection port 11 driven by the elastic component 3, thereby driving the liquid medicine to be injected into the patient's skin through the injection port 11, completing a micro-injection; when the needle-free syringe is activated, the negative pressure in the suction cup structure gradually weakens, and the force on the injection site is relieved, so that the tissue there can relax; the operating component is continued to be driven, and the eccentric component 4 rotates to drive the injection push rod 2 to move backward. When the negative pressure in the suction cup structure has not completely disappeared, the negative pressure in the suction cup structure gradually increases again, and then when the eccentric component 4 rotates to the preset angle again, the needle-free syringe is activated again, thereby performing multiple micro-injections back and forth.

[0046] After completing a microinjection, there is no need to rush to drive the operating components to operate. After the negative pressure in the suction cup structure disappears and the adsorption effect on the body surface is lost, the injection site is changed and the next microinjection is performed to achieve the change of the injection position.

[0047] After the preset dose of medicine is injected, the operating component is no longer driven to operate, and the negative pressure in the suction cup structure gradually weakens until it no longer has an adsorption effect on the body surface. The needle-free syringe is removed, and the entire injection operation is completed.

[0048] The needle-free syringe of the embodiment of the utility model can realize large-dose needle-free injection of drugs through quick and continuous multiple microinjections, and can ensure that each microinjection is successful and effective. The injection points of multiple microinjections can be reasonably controlled, and the relaxation of tissue at the injection site can be improved during the injection process, thereby ultimately improving the effect of large-dose drug injection.

[0049] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0050] The needle-free syringe of the embodiment of the utility model comprises: a syringe body 1, wherein the interior of the syringe body 1 is provided with a tubular cavity 10 extending in a preset direction, and an injection port 11 is provided on the syringe body 1, and the injection port 11 connects the tubular cavity 10 with the external space of the syringe body 1; an injection push rod 2, which is installed in the tubular cavity 10 and is movably arranged in a preset direction to drive the liquid in the tubular cavity 10 to be ejected through the injection port 11; an elastic component 3, which cooperates with the injection push rod 2, and the elastic component 3 has a stored state and a released state. Release state, when the elastic component 3 switches from the stored force state to the released state, the elastic component 3 drives the injection push rod 2 to move toward the injection port 11; the eccentric component 4, the eccentric component 4 is rotatably mounted on the syringe body 1, and the eccentric component 4 is in transmission cooperation with the injection push rod 2. When the eccentric component 4 rotates, the eccentric component 4 drives the injection push rod 2 to move away from the injection port 11. When the eccentric component 4 rotates to a preset angle, the eccentric component 4 releases the injection push rod 2, so that the injection push rod 2 moves toward the injection port 11 under the driving action of the elastic component 3. The needle-free syringe adopting this structural design is provided with an elastic component 3 and an eccentric component 4. When the eccentric component 4 rotates, it can drive the injection push rod 2 to move in the direction away from the injection port 11 under its eccentric action. At this time, the elastic component 3 gradually accumulates force and finally switches to the force accumulation state. When the eccentric component 4 rotates to a preset angle, the eccentric component 4 releases the injection push rod 2, and the system is stimulated by the high-position state of the deviation. Therefore, the elastic component 3 will switch from the force accumulation state to the release state. At this time, it will drive the injection push rod 2 to move toward the injection port 11, and the injection push rod 2 will drive the liquid in the lumen 10 to be ejected through the injection port 11. After adopting this structural design, the needle-free syringe can be stored and stimulated by the rotation of the eccentric component 4. When the eccentric component 4 rotates continuously, the entire needle-free syringe can be cyclically stored and stimulated to achieve injection of liquid medicine. Compared with the needle-free syringe in the related art, the needle-free syringe in the embodiment of the utility model effectively simplifies the structure of the needle-free syringe while ensuring the normal injection function, which is beneficial to reducing the cost and operational reliability of the needle-free syringe, and solves the technical problem of the overly complex structure of the needle-free syringe in the related art.

[0051] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0052] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0053] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0054] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A needle-free syringe, characterized in that: include: A syringe body (1), wherein a lumen (10) extending along a preset direction is provided inside the syringe body (1), and an injection port (11) is provided on the syringe body (1), wherein the injection port (11) connects the lumen (10) with an external space of the syringe body (1); An injection push rod (2), the injection push rod (2) being mounted on the tube cavity (10), the injection push rod (2) being movably arranged along the preset direction so as to drive the liquid medicine in the tube cavity (10) to be ejected through the injection port (11); an elastic component (3), the elastic component (3) cooperates with the injection push rod (2), the elastic component (3) has a force storage state and a release state, and when the elastic component (3) switches from the force storage state to the release state, the elastic component (3) drives the injection push rod (2) to move toward the injection port (11); An eccentric component (4) is rotatably mounted on the syringe body (1); the eccentric component (4) is in transmission cooperation with the injection push rod (2); when the eccentric component (4) rotates, the eccentric component (4) drives the injection push rod (2) to move in a direction away from the injection port (11); when the eccentric component (4) rotates to a preset angle, the eccentric component (4) releases the injection push rod (2), so that the injection push rod (2) moves toward the injection port (11) under the driving action of the elastic component (3).

2. The needle-free injector according to claim 1, characterized in that: The eccentric component (4) is a crankshaft or a cam.

3. The needle-free injector according to claim 1, characterized in that: The syringe body (1) is provided with a liquid medicine inlet, which is in communication with the lumen (10). The needle-free syringe further comprises a one-way valve (5), which is in communication with the liquid medicine inlet.

4. The needle-free injector according to claim 3, characterized in that: The needle-free syringe comprises a container (6), wherein the container (6) has a containing cavity for storing a drug solution, and the container (6) is connected to the one-way valve (5). When the injection push rod (2) moves in a direction away from the injection port (11), the drug solution in the container (6) flows into the lumen (10) through the one-way valve (5) under the action of a pressure difference.

5. The needle-free injector according to claim 1, characterized in that: The needle-free syringe comprises an elastic force adjustment component (7), and the elastic force adjustment component (7) is used to adjust the elastic force of the elastic component (3).

6. The needle-free injector according to claim 5, characterized in that: The elastic force adjustment component (7) is installed on the syringe body (1), and the elastic force adjustment component (7) is adjustably arranged along the preset direction. One end of the elastic component (3) cooperates with the injection push rod (2), and the other end of the elastic component (3) cooperates with the elastic force adjustment component (7).

7. The needle-free injector according to claim 6, characterized in that: The elastic component (3) is a spring, a spring installation cavity (12) is provided in the syringe body (1), and the spring is installed in the spring installation cavity (12). The needle-free syringe also includes a spring seat (8), and the spring seat (8) is detachably installed at one end of the spring installation cavity (12) so that the spring can be limited in the spring installation cavity (12) by the spring seat (8), wherein the spring seat (8) is provided with a through hole extending along the preset direction, and the elastic force adjustment component (7) is installed in the through hole, one end of the spring abuts against the injection push rod (2), and the other end of the spring abuts against the elastic force adjustment component (7).

8. The needle-free injector according to any one of claims 1 to 7, characterized in that: The injection push rod (2) is provided with one or more protrusions (21), and the syringe body (1) is provided with a guide groove (13) corresponding to the position of the protrusion (21), the guide groove (13) is extended along the preset direction, and the protrusion (21) is slidably arranged in the guide groove (13) along the preset direction.

9. The needle-free injector according to any one of claims 1 to 7, characterized in that: The needle-free injector comprises: A motor assembly (9), wherein a power output shaft of the motor assembly (9) is connected to the eccentric component (4) to drive the eccentric component (4) to rotate; An operating component is communicatively connected with the motor component (9) so as to control the working state of the motor component (9) by operating the operating component.

10. The needle-free injector according to any one of claims 1 to 7, characterized in that: The needle-free syringe comprises a suction cup structure, which is arranged on the syringe body (1) and is arranged around the injection port (11).

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