Needle-free syringe

Abstract

The utility model discloses a needle-free syringe, comprising: an injection main unit; a liquid storage device, which is arranged outside the injection main unit and is separated from each other; a hose, one end of which is connected to the cavity of the liquid storage device, and the other end is connected to the injection cavity of the injection main unit. When in use, the injection main unit is held in hand, and when it is necessary to introduce liquid medicine, the liquid medicine can be introduced from the liquid storage device through the hose. Because it is connected by a hose, the position of the injection main unit can be within a predetermined range without moving the liquid storage device. Because the liquid medicine can be introduced from the liquid storage device through the hose, and the injection main unit can be moved alone within a predetermined range. Therefore, it is easier and more convenient for personnel to operate, and the labor intensity is reduced. In summary, the needle-free syringe can effectively solve the problem of inconvenient operation of current syringes.

Description

Technical Field

[0001] The utility model relates to the technical field of injection equipment, and more specifically 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 has the advantages of reducing the pain and fear of drug injection, reducing the risk of bacterial infection, avoiding accidents such as needle scratches and breakage, fast drug absorption, no subcutaneous nodules after long-term use, and high injection efficiency. The liquid storage device of the disclosed needle-free syringe is a liquid medicine bottle, which is set on the main body of the device. When operating the device, the operator needs to carry this part of the weight, which is laborious and inconvenient to operate.

[0003] The liquid storage device of the current needle-free syringe is a liquid medicine bottle, which is arranged on the main body of the device. When operating the device, the operator needs to carry this part of the weight, which is laborious and inconvenient to operate.

[0004] In summary, how to effectively solve the problem of inconvenient syringe operation is an urgent problem that technicians in this field need to solve. Utility Model Content

[0005] In view of this, the first purpose of the present invention is to provide a needle-free syringe, which can effectively solve the problem of inconvenient operation of current syringes; the second purpose is to provide a needle-free syringe host.

[0006] In order to achieve the above object, the utility model provides the following technical solutions:

[0007] A needle-free syringe, comprising:

[0008] Injection host;

[0009] A liquid storage device is arranged outside the injection main unit and is separated from the injection main unit;

[0010] A hose has one end connected to the cavity of the liquid storage device and the other end connected to the injection cavity of the injection host.

[0011] When in use, the injection host is held in hand, and when liquid medicine needs to be introduced, the liquid medicine can be introduced from the liquid storage device through a hose. Because it is connected by a hose, the position of the injection host can be kept within a predetermined range without moving the liquid storage device. In the above-mentioned needle-free syringe, there is no need to apply gravity to the liquid storage device due to the conductive connection of the hose, but liquid medicine can be introduced from the liquid storage device through the hose, and the injection host can be moved alone within a predetermined range. Therefore, it is easier and more convenient for personnel to operate, and the labor intensity is reduced. In summary, the needle-free syringe can effectively solve the problem of inconvenient operation of current syringes.

[0012] In some technical solutions, both ends of the hose have quick connectors to respectively cooperate with a first quick connector on the liquid storage device and a second quick connector on the injection host.

[0013] In some technical solutions, the injection host includes a handle, and the bottom of the handle is provided with the second quick interface, and the second quick interface is connected to the liquid inlet of the injection cavity through a pipeline.

[0014] In some technical schemes, the injection host includes a main shell, an injection assembly and a pushing device for pushing the injection push rod in the injection assembly, the rear part of the injection assembly is located in the main shell and the front end extends out of the main shell, and the pushing device is located in the main shell; the pushing device includes a driving mechanism for driving the injection push rod to move backward and an elastic device for preventing the injection push rod from moving backward; one end of the elastic device abuts on the injection push rod, and the other end abuts on the main shell; the injection assembly includes an injection cavity, an injection port arranged at the front end of the injection cavity and a nozzle fixed on the main shell, the piston rod portion of the injection push rod is slidably arranged in the injection cavity, and the injection port is docked with the nozzle.

[0015] In some technical solutions, an excitation device is provided on the nozzle, and the excitation device is linked to the pushing device; the nozzle is sleeved on the mouth of the injection assembly, and is connected to the shoulder at the mouth in the front-to-back direction through a return spring.

[0016] In some technical solutions, a safety device is also included, so that when the safety device is locked, the pushing device cannot be started.

[0017] In some technical solutions, the injection push rod also includes a driving rod portion, the front end of the driving rod portion is fixedly connected to the rear end of the piston rod portion, and the elastic device is a spring and is sleeved on the driving rod portion; a circular tube structure is provided in the main body shell, and the elastic device is cooperatively installed in the circular tube.

[0018] In some technical solutions, the driving mechanism is a voice coil linear motor; the driving shaft of the driving mechanism is arranged parallel to the injection push rod and is connected by a connecting rod; the piston rod portion includes a front piston portion and a rear rod portion, and the diameter of the rear rod portion is smaller than the diameter of the front piston portion.

[0019] In some technical schemes, the injection assembly also includes a sealing body, the piston rod portion passes through the sealing body and is slidably fitted therebetween, the sealing body is provided with a drug inlet groove, the piston rod portion is provided with a drug guiding channel, one end of the drug guiding channel is used to connect with the drug inlet groove, and the other end extends to the front end face of the piston rod portion to connect with the injection cavity; the sealing body and its outer shell portion are sealed by an O-ring, the outer shell portion and the sealing body form a drug inlet channel that is connected in sequence, and the drug inlet channel forms an interface on the outside of the outer shell portion to connect with the second quick interface.

[0020] In some technical solutions, the injection port is provided with a one-way valve.

[0021] In order to achieve the above second purpose, the utility model also provides a needle-free syringe host, which includes a main body shell, an injection assembly and a pushing device for pushing the injection push rod in the injection assembly to move, the rear part of the injection assembly is located in the main body shell and the front end extends out of the main body shell, and the pushing device is located in the main body shell; the pushing device includes a driving mechanism for driving the injection push rod to move backward and an elastic device for preventing the injection push rod from moving backward; one end of the elastic device abuts on the injection push rod and the other end abuts on the main body shell; the injection assembly includes an injection cavity, an injection port arranged at the front end of the injection cavity and a nozzle fixed on the main body shell, the piston rod of the injection push rod is slidably arranged in the injection cavity, and the injection port is connected to the nozzle; the main body shell has a handle, and the bottom of the handle is provided with a second quick interface for an external liquid storage device, and the second quick interface is connected to the liquid inlet of the injection cavity through a pipeline. Since the above needle-free syringe has the above technical effects, the needle-free syringe host for an external liquid storage device should also have corresponding technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the overall structure of a needle-free syringe provided by an embodiment of the utility model;

[0024] Figure 2 This is a schematic structural diagram of a cross section of an injection host provided in an embodiment of the utility model.

[0025] The following are marked in the accompanying drawings:

[0026] Injection host 1, liquid storage device 2, hose 3, quick connector 4;

[0027] The second quick interface 11, the handle 12, the main body shell 13, the elastic device 14, the driving mechanism 15, the injection cavity 16, the nozzle 17, the injection port 18, the excitation device 19, the return spring 20, the piston rod portion 21, the driving rod portion 22, the round tube 23, the connecting rod 24, the sealing body 25, the O-ring 26, the one-way valve 27, the drug inlet groove cavity 28, and the drug guiding channel 29. DETAILED DESCRIPTION

[0028] The embodiment of the utility model discloses a needle-free syringe, which effectively solves the problem of inconvenient operation of the current syringe.

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] See also Figure 1-Figure 2 , Figure 1 A schematic diagram of the overall structure of a needle-free syringe provided by an embodiment of the utility model; Figure 2 This is a schematic structural diagram of a cross section of an injection host provided in an embodiment of the utility model.

[0031] In some embodiments, a needle-free syringe with an external liquid storage device 2 is provided, which mainly includes an injection host 1, a drug supply pipeline assembly, and a liquid storage device 2. The liquid storage device 2 is externally placed and separated from the syringe body. The overall weight of the syringe is reduced, making it easier and more convenient for personnel to operate, thereby reducing labor intensity.

[0032] In some embodiments, a needle-free syringe is provided. Specifically, the needle-free syringe includes an injection host 1 , a liquid storage device 2 and a hose 3 .

[0033] The injection host 1 is the main injection component, which mainly includes an injection assembly and a push device. The injection assembly is provided with a nozzle 17 for injection. The push device is used to push the injection push rod at the injection cavity 16 to move, so as to push the liquid medicine to the nozzle 17 to complete the injection. Generally, a main body shell 13 is also provided, and the push device is arranged in the main body shell 13. The main part of the injection assembly is installed in the main body shell 13, and only part of the structure is exposed at the front side of the main body shell 13 for injection.

[0034] The liquid storage device 2 can store the liquid medicine used for injection by the syringe, and can also store the clean water and sterile water used for washing the syringe. The liquid storage device 2 can be a bag body structure, a box body structure, a bottle body structure, etc.

[0035] The liquid storage device 2 is disposed outside the injection host 1 and is separated from the injection host 1, so that the injection host 1 does not need to be supported, so that when the injection host 1 is picked up, when overcoming the gravity of the injection host 1, it is not necessary to overcome the gravity of the liquid storage device 2. For example, the injection host 1 has a main shell 13. At this time, the liquid storage device 2 is disposed outside the main shell 13 and does not need to be connected.

[0036] The hose 3 refers to a relatively flexible pipe, such as a metal hose 3, a plastic tube, such as a silicone tube, etc. One end of the hose 3 is connected to the cavity of the liquid storage device 2, and the other end is connected to the injection cavity of the injection host 1, so that the liquid storage device 2 and the injection host 1 can transfer the liquid medicine through the hose 3, but cannot transfer the supporting force through the hose 3. It should be noted that the length of the hose 3 is set according to the actual range of motion required by the injection host 1, and is not limited here.

[0037] When in use, the injection host 1 is held in the hand, and when liquid medicine needs to be introduced, the liquid medicine can be introduced from the liquid storage device 2 through the hose 3. Because it is connected through the hose 3, the injection host 1 can be positioned within a predetermined range without moving the liquid storage device 2. In the above-mentioned needle-free syringe, there is no need to apply gravity to the liquid storage device 2 due to the conductive connection of the hose 3, but the liquid medicine can be introduced from the liquid storage device 2 through the hose 3, and the injection host 1 can be moved alone within a predetermined range. Therefore, it is easier and more convenient for personnel to operate, and the labor intensity is reduced. In summary, the needle-free syringe can effectively solve the problem of inconvenient syringe operation.

[0038] In some embodiments, considering that the liquid storage device 2 is external, it needs to be frequently disassembled. Based on this, it is preferred that both ends of the hose 3 have quick connectors 4 to respectively cooperate with the first quick interface on the liquid storage device 2 and the second quick interface 11 on the injection host 1, so that the two ends of the hose 3 can be conveniently connected to the injection host 1 and the liquid storage device 2 quickly, saving time and effort. The quick connector 4 and the quick interface cooperate with each other, one is a male head and the other is a female head. The assembly structure of the quick connector 4 can refer to the prior art. Of course, the connection method between the hose 3 and the liquid storage device 2 and the injection host 1 interface can be a general plug-in, and then locked with a lock. Of course, it can also refer to the connection method between other hoses and connectors.

[0039] In some embodiments, generally for the convenience of operation, the injection host 1 includes a handle 12, so that the injection host 1 is L-shaped as a whole. A second quick interface 11 is provided at the bottom of the handle 12, and the second quick interface 11 is connected to the liquid inlet of the injection cavity through a pipeline. The second quick interface 11 is provided at the bottom of the handle 12, which can effectively reduce the length of the hose 3 and avoid interference with the injection operation.

[0040] In some embodiments, specifically, the injection host 1 can include a main shell 13, an injection assembly and a pushing device for pushing the injection push rod in the injection assembly, the rear portion of the injection assembly is located in the main shell 13 and the front end extends out of the main shell, the pushing device is located inside the main shell 13, and the liquid storage device 2 is arranged on the outside of the main shell 13.

[0041] The pushing device may be an electric cylinder, which is convenient for driving the injection push rod to move forward to complete the injection and move backward to complete the liquid extraction. Specifically, the pushing device may include a driving mechanism 15 and an elastic device 14. The driving mechanism 15 is used to drive the injection push rod to move backward to complete the liquid extraction. It should be noted that, in order to facilitate the description of the positional relationship of each structure, the general injection direction is the forward direction, and the opposite direction is the backward direction.

[0042] Correspondingly, the elastic device 14 is used to prevent the injection push rod from moving backwards, so as to store energy when the driving mechanism 15 drives the injection push rod to move backwards to pump liquid, and when the driving mechanism 15 releases the limit, the injection push rod moves forward under the elastic energy of the elastic device 14 to complete the injection. The elastic device 14 is generally a compression elastic device, one end of which abuts on the injection push rod and the other end abuts on the main housing 13.

[0043] The injection assembly includes an injection cavity 16, an injection port 18 disposed at the front end of the injection cavity 16, and a nozzle 17 fixed to the main housing 13, wherein the piston rod portion 21 of the injection push rod is slidably disposed in the injection cavity 16, so as to push the liquid in the injection cavity 16 to flow out from the injection port 18 when moving forward, and to introduce liquid from the liquid storage device 2 through the hose 3 when moving backward. The injection port 18 is docked with the nozzle 17, so that the liquid flowing out of the injection port 18 is sprayed out from the nozzle 17.

[0044] In some embodiments, the nozzle 17 may be provided with an excitation device 19, and the excitation device 19 may be linked with the pushing device. When the excitation device 19 is excited, the pushing device is activated to complete the injection. The squeezing device is preferably a proximity switch, which generates a response signal when it approaches human skin and is pressed, and is transmitted to the pushing device as a starting signal for the pushing device.

[0045] In some embodiments, it is preferred that the nozzle 17 is sleeved on the mouth of the injection assembly, and is connected to the shoulder at the mouth in the front-to-back direction through a return spring 20 to prevent the nozzle 17 from tilting.

[0046] In some embodiments, a safety device is also included, so that when the safety device is locked, the push device cannot be started. The safety device is such as a latch to prevent the injection push rod from starting forward and backward, and of course it can also be the switch of the conductive circuit of the push device.

[0047] In some embodiments, in order to facilitate the installation of the elastic device 14, generally speaking, the injection push rod may further include a driving rod 22, wherein the front end of the driving rod 22 is fixedly connected to the rear end of the piston rod 21, wherein the elastic device 14 is a spring and is sleeved on the driving rod 22. A round tube 23 structure is provided in the main housing 13, and the elastic device 14 is cooperatively installed in the round tube 23. The rear end of the elastic device 14 abuts against the bottom of the round tube 23, and the front end abuts against the shoulder in the middle of the driving rod 22.

[0048] In some embodiments, the driving mechanism 15 may be a hydraulic motor or an electric motor. Specifically, the driving mechanism 15 may be a voice coil linear motor.

[0049] The driving shaft of the driving mechanism 15 is arranged in parallel with the injection push rod and connected therebetween via a connecting rod 24 , wherein the driving shaft and the connecting rod 24 may be driven by a cam mechanism.

[0050] In one embodiment, it is preferred that the piston rod portion 21 comprises a front piston portion and a rear rod portion, and the diameter of the rear rod portion is smaller than the diameter of the front piston portion, so that the piston rod portion 21 is a stepped cylindrical structure.

[0051] In some embodiments, in order to facilitate the drug introduction, the injection assembly preferably further includes a sealing body 25, the piston rod portion 21 passes through the sealing body 25 and slides therebetween, a drug inlet cavity 28 is provided on the sealing body 25, and a drug guiding channel 29 is provided on the piston rod portion 21, one end of the drug guiding channel 29 is used to dock with the drug inlet cavity 28, and the other end extends to the front end face of the piston rod portion 21 to connect with the injection cavity 16. In the injection stage, the drug inlet of the drug guiding channel 29 will be staggered with the drug inlet cavity 28 to be closed by the cavity wall; and in the liquid extraction stage, the piston rod portion 21 is moved to align the drug inlet of the drug guiding channel 29 with the drug inlet cavity 28, so that it is opened and the drug solution can be introduced.

[0052] The sealing body 25 and its outer shell are sealed by an O-ring 26, and the outer shell and the sealing body 25 form a drug inlet channel that is connected in sequence. The drug inlet channel on the sealing body 25 is connected to the child's drug inlet groove cavity 28, and the drug inlet channel forms an interface on the outside of the outer shell to connect to the second quick interface 11.

[0053] In some embodiments, the injection port 18 is provided with a one-way valve 27 to prevent liquid backflow.

[0054] Based on the needle-free syringe provided in the above embodiment, the utility model further provides a needle-free syringe host, which includes a main body shell 13, an injection assembly and a pushing device for pushing the injection push rod in the injection assembly to move, the rear portion of the injection assembly is located in the main body shell 13 and the front end extends out of the main body shell 13, and the pushing device is located in the main body shell 13; the pushing device includes a driving mechanism for driving the injection push rod to move backward and an elastic device 14 for preventing the injection push rod from moving backward; one end of the elastic device 14 abuts against The other end of the injection push rod is in contact with the main housing 13; the injection assembly includes an injection cavity 16, an injection port 18 disposed at the front end of the injection cavity 16, and a nozzle 17 fixed to the main housing 13; the piston rod portion 21 of the injection push rod is slidably disposed in the injection cavity 16, and the injection port 18 is butted against the nozzle 17; the main housing 13 has a handle 12, and the bottom of the handle 12 is provided with a second quick interface 11 for externally connecting a liquid storage device 2, and the second quick interface 11 is connected to the liquid inlet of the injection cavity 16 through a pipeline. Since the above-mentioned needle-free syringe has the above-mentioned technical effects, the needle-free syringe host for externally connecting a liquid storage device should also have corresponding technical effects.

[0055] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0056] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A needle-free syringe, characterized in that: include: Injection host; A liquid storage device is arranged outside the injection main unit and is separated from the injection main unit; A hose, one end of which is connected to the cavity of the liquid storage device, and the other end is connected to the injection cavity of the injection host; both ends of the hose have quick connectors to respectively cooperate with the first quick interface on the liquid storage device and the second quick interface on the injection host; the injection host includes a main shell, an injection assembly and a pushing device for pushing the injection push rod in the injection assembly, the rear part of the injection assembly is located in the main shell and the front end extends out of the main shell, and the pushing device is located in the main shell; the pushing device includes a driving mechanism for driving the injection push rod to move backward and an elastic device for preventing the injection push rod from moving backward; one end of the elastic device abuts on the injection push rod, and the other end abuts on the main shell; the injection assembly includes an injection cavity, an injection port arranged at the front end of the injection cavity and a nozzle fixed on the main shell, the piston rod portion of the injection push rod is slidably arranged in the injection cavity, and the injection port is connected to the nozzle.

2. The needle-free injector according to claim 1, characterized in that: The injection host comprises a handle, the bottom of the handle is provided with the second quick interface, and the second quick interface is connected to the liquid inlet of the injection cavity through a pipeline.

3. The needle-free injector according to claim 1, characterized in that: The nozzle is provided with an excitation device, which is linked with the pushing device; the nozzle is sleeved on the mouth of the injection assembly and is connected with the shoulder at the mouth in the front-to-back direction through a return spring.

4. The needle-free injector according to claim 1, characterized in that: The utility model also comprises a safety device, so that when the safety device is locked, the pushing device cannot be started.

5. The needle-free injector according to claim 4, characterized in that: The injection push rod also includes a driving rod portion, the front end of which is fixedly connected to the rear end of the piston rod portion, and the elastic device is a spring and is sleeved on the driving rod portion; a circular tube structure is arranged in the main body shell, and the elastic device is cooperatively installed in the circular tube.

6. The needle-free injector according to claim 5, characterized in that: The driving mechanism is a voice coil linear motor; the driving shaft of the driving mechanism is arranged parallel to the injection push rod and is connected by a connecting rod; the piston rod portion includes a front piston portion and a rear rod portion, and the diameter of the rear rod portion is smaller than the diameter of the front piston portion.

7. The needle-free injector according to claim 6, characterized in that: The injection assembly also includes a sealing body, the piston rod portion passes through the sealing body and is slidably fitted therebetween, the sealing body is provided with a drug feed groove, the piston rod portion is provided with a drug guide channel, one end of the drug guide channel is used to connect with the drug feed groove, and the other end extends to the front end face of the piston rod portion to connect with the injection cavity; the sealing body and its outer shell portion are sealed by an O-ring, the outer shell portion and the sealing body form a drug feed channel that is connected in sequence, and the drug feed channel forms an interface on the outside of the outer shell portion to connect with the second quick interface; the injection port is provided with a one-way valve.

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