Drug delivery system

Abstract

This application provides a drug delivery system. The drug delivery system includes: a drug delivery device, a liquid injection device, and an elastic connector; the drug delivery device includes a drug delivery cylinder and a first piston rod, the first piston rod being slidably disposed within the drug delivery cylinder; the drug delivery cylinder includes a cylinder body with graduations and a limiting portion, the limiting portion being disposed on the cylinder body, and the position of the limiting portion being adjustable; one end of the elastic connector is fixed, and the other end of the elastic connector is fixed to the limiting portion; when the limiting portion is located in a first position on the cylinder body, and the first piston rod is pushed, the elastic connector generates a first compression amount, and the amount of liquid injected by the drug delivery device into the liquid injection device is a first parameter value; when the limiting portion is located in a second position on the cylinder body, and the first piston rod is pushed, the elastic connector generates a second compression amount, and the amount of liquid injected by the drug delivery device into the liquid injection device is a second parameter value.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and more specifically, to a drug delivery system. Background Technology

[0002] In interventional treatments, such as balloon dilation, after the balloon is placed at the lesion site, it is often necessary to administer medication into the balloon.

[0003] Currently, the dosage cannot be precisely controlled during the administration of drugs to balloons and other medical devices, which poses difficulties for medical procedures. Summary of the Invention

[0004] The purpose of this application is to provide a new technology solution for a drug delivery system.

[0005] In a first aspect, this application provides a drug delivery system. The drug delivery system includes: a drug delivery device, a liquid injection device, and a resilient connector;

[0006] The drug delivery device includes a drug delivery cylinder and a first piston rod, the first piston rod being slidably disposed within the drug delivery cylinder; when the first piston rod is pushed, the drug delivery device can inject liquid into the liquid injection device.

[0007] The drug delivery cartridge includes a cartridge body with graduation lines and a limiting part. The limiting part is disposed on the cartridge body, and the position of the limiting part can be adjusted.

[0008] One end of the elastic connector is fixed, and the other end of the elastic connector is fixed to the limiting part;

[0009] When the limiting part is located at the first position of the cylinder body and the first piston rod is pushed, the elastic connector generates a first compression amount, and the amount of liquid injected by the drug delivery device into the injection device is a first parameter value.

[0010] When the limiting part is located at the second position of the cylinder body and the first piston rod is pushed, the elastic connector generates a second compression amount, and the amount of liquid injected by the drug delivery device into the injection device is a second parameter value.

[0011] Optionally, the first position of the cylinder body is closer to the liquid injection device than the second position of the cylinder body, and the first parameter value is greater than the second parameter value.

[0012] Optionally, the limiting part is slidably disposed on the cylinder body; or the limiting part is rotatably disposed on the cylinder body.

[0013] Optionally, the limiting part is sleeved on the cylinder body;

[0014] A first threaded structure is provided on the outer circumferential surface of the cylinder body, and a second threaded structure is provided on the inner circumferential surface of the limiting part, wherein the first threaded structure and the second threaded structure cooperate with each other.

[0015] Optionally, the limiting part is embedded in the cylinder body;

[0016] Along the length of the cylindrical body, a recessed groove is provided on the outer surface of the cylindrical body, and a protrusion is provided on the limiting part, the protrusion cooperating with the recessed groove.

[0017] Optionally, the drug delivery system further includes a drive device connected to the first piston rod to drive the first piston rod to slide within the drug delivery cylinder.

[0018] Optionally, the driving device includes a handle body, a limiting structure, and a guide portion; the end of the first piston rod is fixedly connected to the handle body;

[0019] The limiting structure is disposed in the handle body, and the guiding direction of the guide part is consistent with the length direction of the first piston rod;

[0020] One end of the guide is fixed, and the other end of the guide cooperates with the limiting structure so that the handle body can move along the guide.

[0021] Optionally, the limiting structure includes a first limiting plate and a second limiting plate, both of which are fixed within the handle body, and are spaced apart and arranged opposite to each other; a limiting channel is provided between the first limiting plate and the second limiting plate, and the limiting channel extends along the length direction of the first piston rod.

[0022] Optionally, the guide portion includes a guide plate and a protrusion disposed on the guide plate, the protrusion being engaged within the limiting channel.

[0023] Optionally, the drug delivery system further includes a liquid supply device and an elastic component, the liquid supply device being used to store liquid;

[0024] The liquid supply device has a liquid supply port;

[0025] The drug delivery cartridge has a first port and a second port, and the first piston rod is disposed inside the drug delivery cartridge through the second port;

[0026] The liquid injection device has an inlet port and an outlet port, the outlet port being used to connect to external devices;

[0027] The elastic component is disposed on the liquid supply port and blocks the liquid supply port, the first port and the liquid inlet port;

[0028] When the first piston rod moves away from the first port, the elastic component undergoes a first type of elastic deformation, and the liquid in the liquid supply device is drawn into the drug delivery cartridge;

[0029] When the first piston rod moves toward the first port, the elastic component undergoes a second type of elastic deformation, and the liquid in the drug delivery device is forced into the injection device.

[0030] Optionally, the elastic member has a first surface and a second surface disposed opposite to each other, and a side surface connected to the first surface and the second surface;

[0031] The first port is in contact with the first surface and the side surface, the liquid inlet port is in contact with the first surface, and the liquid supply port is in contact with the second surface.

[0032] Optionally, when the first piston rod moves toward the first port, the first surface is recessed toward the direction away from the liquid inlet port and the first port, so that a first opening is formed between the first port and the first surface, and a second opening is formed between the liquid inlet port and the first surface, and the first opening and the second opening are connected.

[0033] Optionally, when the first piston rod moves away from the first port, the second surface is recessed away from the liquid supply port, so that a third opening is formed between the liquid supply port and the second surface, and a fourth opening is formed between the side surface and the first port, and the third opening and the fourth opening are in communication.

[0034] Optionally, the liquid supply device includes a connecting part and a liquid supply body. The connecting part has a first mounting port, a second mounting port and a third mounting port. The liquid supply body is disposed on the connecting part through the first mounting port and is detachably connected to the connecting part.

[0035] The drug delivery device is disposed on the connecting part through the second mounting port and is fixedly connected to the connecting part;

[0036] The injection device is mounted on the connecting part through the third mounting port and is fixedly connected to the connecting part.

[0037] Optionally, the connecting part is a cylindrical structure, and the open end of the cylindrical structure is the first mounting port;

[0038] The cylindrical structure is provided with a mounting part, the peripheral surface of the mounting part is connected to the inner peripheral surface of the cylindrical structure, and the mounting part is provided with a plug-in hole that penetrates the mounting part;

[0039] The liquid supply body is sequentially mounted on the mounting part via the first mounting port and the insertion hole.

[0040] Optionally, the liquid supply port of the liquid supply body is flush with the first mounting surface of the mounting part, the first mounting surface being the surface of the mounting part near the liquid injection device, and the elastic member is disposed on the first mounting surface.

[0041] According to an embodiment of this application, a drug delivery system is provided. The drug delivery system includes a drug delivery device, a liquid injection device, and an elastic connector. By adjusting the position of the limiting part on the cylindrical body and limiting the movement of the first piston rod during the pushing process by the compression amount of the elastic connector, the drug delivery device can quantitatively inject liquid into the liquid injection device.

[0042] Other features and advantages of this specification will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0043] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of this specification and, together with their description, serve to explain the principles of this specification.

[0044] Figure 1 The diagram shown is a structural diagram of the drug delivery system provided in an embodiment of this application.

[0045] Figure 2 The diagram shown is a structural diagram of the drug delivery system provided in an embodiment of this application (elastic connectors are not shown).

[0046] Figure 3 The diagram shown is a partial structural diagram of the drug delivery system provided in an embodiment of this application.

[0047] Figure 4 The diagram shown is a structural diagram of the handle body provided in an embodiment of this application.

[0048] Figure 5 The diagram illustrates the principle of the drug delivery system provided in this application embodiment. Figure 1 .

[0049] Figure 6 The diagram illustrates the principle of the drug delivery system provided in this application embodiment. Figure 2 .

[0050] Figure 7 The diagram illustrates the principle of the drug delivery system provided in this application embodiment. Figure 3 .

[0051] Explanation of reference numerals in the attached figures:

[0052] 1. Liquid supply device; 10. Liquid supply body; 11. Connecting part; 12. Liquid supply port; 13. Liquid supply cylinder; 14. Second piston rod; 111. First mounting port; 112. Second mounting port; 113. Third mounting port;

[0053] 2. Drug delivery device; 21. Drug delivery cylinder; 22. First piston rod; 211. First port; 212. Second port; 213. Cylinder body; 214. Limiting part;

[0054] 3. Liquid injection device; 31. Liquid inlet port; 32. Liquid outlet port;

[0055] 4. Elastic component; 41. First surface; 42. Second surface; 43. Side surface;

[0056] 51. First opening; 52. Second opening; 53. Third opening; 54. Fourth opening;

[0057] 6. Flexible connectors;

[0058] 71. Handle body; 72. Limiting structure; 73. Guide part; 721. First limiting plate; 722. Second limiting plate; 723. Limiting channel; 731. Guide plate; 732. Protrusion. Detailed Implementation

[0059] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0060] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0061] Technologies and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such technologies and equipment should be considered part of the specification.

[0062] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0063] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0064] This application provides a drug delivery system. (Refer to...) Figures 1-7 The drug delivery system includes: a drug delivery device 2, a liquid injection device 3, and an elastic connector 6.

[0065] The drug delivery device 2 includes a drug delivery cylinder 21 and a first piston rod 22, the first piston rod 22 being slidably disposed within the drug delivery cylinder 21; when the first piston rod 22 is pushed, the drug delivery device 2 can inject liquid into the liquid injection device 3.

[0066] The drug delivery cartridge 21 includes a graduated cartridge body 213 and a limiting part 214. The limiting part 214 is disposed on the cartridge body 213, and the position of the limiting part 214 can be adjusted.

[0067] One end of the elastic connector 6 is fixed, and the other end of the elastic connector 6 is fixed to the limiting part 214.

[0068] When the limiting part 214 is located at the first position of the cylinder body 213 and the first piston rod 22 is pushed, the elastic connector 6 generates a first compression amount, and the amount of liquid injected by the drug delivery device 2 into the injection device 3 is a first parameter value.

[0069] When the limiting part 214 is located in the second position of the cylinder body 213 and the first piston rod 22 is pushed, the elastic connector 6 generates a second compression amount, and the amount of liquid injected by the drug delivery device 2 into the injection device 3 is the second parameter value.

[0070] In this embodiment, the drug delivery system mainly includes a drug delivery device 2, an injection device 3, and an elastic connector 6. The drug delivery device 2 is used to quantitatively supply liquid to the injection device 3. The injection device 3 is used to connect to an external device and quantitatively inject liquid into the external device. The external device can be a balloon or the like.

[0071] In this embodiment, reference is made to Figures 1-3 The drug delivery device 2 includes a drug delivery cylinder 21 and a first piston rod 22. The first piston rod 22 can slide within the drug delivery cylinder 21. When the first piston rod 22 is pushed, the drug delivery device 2 can inject liquid into the injection device 3. Therefore, the principle of the drug delivery device 2 injecting liquid into the injection device 3 is the same as the principle of syringe injection.

[0072] This application improves the structure of the drug delivery cartridge 21 and achieves the purpose of quantitatively injecting liquid into the injection device 3 through the elastic compression of the elastic connector 6.

[0073] Specifically, the drug delivery cartridge 21 includes a graduated cartridge body 213 and a limiting part 214. The limiting part 214 is disposed on the cartridge body 213, and the position of the limiting part 214 can be adjusted. The graduations on the cartridge body 213 are used to characterize the volume of the liquid.

[0074] Specifically, the position of the limiting part 214 on the cylinder body 213 is not fixed; the limiting part 214 is movably disposed on the cylinder body 213. Medical personnel can adjust the position of the limiting part 214 to a preset position (where the preset position corresponds to a predetermined dosage) according to the patient's actual condition. Then, the compression of the elastic connector 6 limits the movement of the first piston rod 22, so that when the first piston rod 22 is pushed, the dosage of medication injected into the infusion device 3 by the drug delivery device 2 is the predetermined dosage.

[0075] The elastic connector 6 can be a spring or the like. The elastic connector 6 in the drug delivery system is used to limit the forward movement of the first piston rod 22. Specifically, one end of the elastic connector 6 is fixed; for example, one end of the elastic connector 6 can be directly fixed to one end of the first piston rod 22, or one end of the elastic connector 6 can be fixed to the handle body 71 of the drive device (described later), as long as the elastic connector 6 can follow the movement of the first piston rod 22 and achieve elastic deformation. The other end of the elastic connector 6 is fixed to the limiting part 214.

[0076] Since the position of the limiting part 214 is adjusted (i.e., the preset position has been adjusted) before the drug delivery device 2 injects liquid into the injection device 3, the elastic connecting member 6 is gradually compressed during the process of the first piston rod 22 being pushed. In addition, since the other end of the elastic connecting member 6 is fixed on the limiting part 214, when the elastic connecting member 6 is compressed, so that one side of the elastic connecting member 6 is in tight contact with the limiting part 214, the elastic connecting member 6 cannot be compressed further. At this time, the first piston rod 22 cannot be pushed further, so that the amount of drug injected by the drug delivery device 2 into the injection device 3 is the preset quantitative drug solution.

[0077] Specifically, during the process of pushing the first piston rod 22, the elastic connector 6 is compressed. The amount of compression of the elastic connector 6 will vary depending on the position of the limiting part 214 on the cylinder body 213.

[0078] When the limiting part 214 is adjusted to the first position of the cylinder body 213, the first piston rod 22 is pushed, and the elastic connecting member 6 generates a first compression. At this time, the amount of liquid injected by the drug delivery device 2 into the liquid injection device 3 is the first parameter value. The parameter value can be the liquid volume.

[0079] When the position of the limiting part 214 is adjusted to the second position of the cylinder body 213, the first piston rod 22 is pushed, and the elastic connecting member 6 will generate a second compression amount. At this time, the amount of liquid injected into the liquid injection device 3 by the drug delivery device 2 is the second parameter value.

[0080] Because the limiting part 214 is located at different positions on the cylinder body 213, specifically at the first and second positions, the liquid volume injected by the drug delivery device 2 into the liquid injection device 3 is different, meaning the first parameter value and the second parameter value are not equal.

[0081] Therefore, in this embodiment, by adjusting the setting position of the limiting part 214 on the cylinder body 213, and by limiting the amount of movement of the first piston rod 22 during the pushing process by the compression amount of the elastic connector 6, the drug delivery device 2 can quantitatively inject liquid into the injection device 3.

[0082] In one specific embodiment, the first position of the cylinder body 213 is closer to the liquid injection device 3 than the second position of the cylinder body 213, and the first parameter value is greater than the second parameter value.

[0083] In this embodiment, the first position of the cylinder body 213 is closer to the liquid injection device 3 than the second position of the cylinder body 213. That is, after the cylinder body 213 is set in the first position, the limiting part 214 is set closer to the liquid injection device 3. In other words, after the cylinder body 213 is set in the first position, the limiting part 214 is closer to the liquid outlet end of the cylinder body 213 (the first port 211 mentioned later).

[0084] When the limiting part 214 is located at the liquid outlet end (the first port 211 mentioned later) near the cylinder body 213, the elastic connecting member 6 can generate a large amount of compression when the first piston rod 22 is pushed. After the first piston rod 22 is pushed, the first piston rod 22 can move a large amount of movement. At this time, when the drug delivery device 2 injects liquid into the liquid injection device 3, the drug delivery device 2 can inject more liquid into the liquid injection device 3.

[0085] Therefore, in this embodiment, the limiting part 214 is located closer to the liquid outlet end of the cylinder body 213, so that the drug delivery device 2 can inject a larger amount of liquid into the injection device 3.

[0086] In one specific embodiment, the limiting part 214 is slidably disposed on the cylindrical body 213; or the limiting part 214 is rotatably disposed on the cylindrical body 213.

[0087] In this embodiment, the limiting part 214 is provided on the cylinder body 213 in a specific manner, wherein the limiting part 214 is slidably provided on the cylinder body 213, and the position of the limiting part 214 on the cylinder body 213 is adjusted by sliding.

[0088] Alternatively, the limiting part 214 can be rotatably mounted on the cylinder body 213, and the mounting position of the limiting part 214 on the cylinder body 213 can be adjusted by rotation.

[0089] In one specific embodiment, refer to Figures 1-3 The limiting part 214 is sleeved on the cylinder body 213;

[0090] The outer circumferential surface of the cylinder body 213 is provided with a first thread structure, and the inner circumferential surface of the limiting part 214 is provided with a second thread structure, and the first thread structure and the second thread structure cooperate with each other.

[0091] In this specific embodiment, the position of the limiting part 214 on the cylinder body 213 is adjusted by rotating the limiting part 214. Specifically, the limiting part 214 is sleeved on the cylinder body 213, and the cylinder body 213 and the limiting part 214 are connected by threads. When it is necessary to adjust the position of the limiting part 214, the position of the limiting part 214 on the cylinder body 213 is adjusted by rotating the limiting part 214.

[0092] It should be noted that the limiting part 214 can rotate on the cylinder body 213 in a manner including but not limited to a threaded connection, as long as the limiting part 214 can rotate on the cylinder body 213.

[0093] In one specific embodiment, the limiting part 214 is embedded in the cylindrical body 213;

[0094] Along the length of the cylindrical body 213, a recessed groove is provided on the outer surface of the cylindrical body 213, and a protrusion is provided on the limiting part 214, which cooperates with the recessed groove.

[0095] In this specific embodiment, the position of the limiting part 214 on the cylinder body 213 is adjusted by sliding the limiting part 214. Specifically, the limiting part 214 is embedded together, and the cylinder body 213 and the limiting part 214 are embedded together by a groove and a protrusion. When it is necessary to adjust the position of the limiting part 214, the limiting part 214 slides in the groove to adjust the position of the limiting part 214 on the cylinder body 213.

[0096] It should be noted that the way the limiting part 214 slides on the cylinder body 213 includes, but is not limited to, providing a recessed groove on the cylinder body 213, as long as the limiting part 214 can slide on the cylinder body 213.

[0097] In an optional embodiment, the limiting part 214 is detachably disposed on the cylinder body 213.

[0098] In this embodiment, the limiting part 214 can be detached from the cylindrical body 213 and then installed at the desired location by medical personnel. For example, multiple protrusions are spaced apart along the length of the cylindrical body 213, and a recess is provided on the limiting part 214. When adjusting the position of the limiting part 214, a protrusion (corresponding to a scale line on the cylindrical body 213) can be inserted into the recess.

[0099] In one specific embodiment, refer to Figures 1-4 The drug delivery system further includes a driving device connected to the first piston rod 22 to drive the first piston rod 22 to slide within the drug delivery cylinder 21.

[0100] The drug delivery system provided in this application embodiment allows manual operation of the first piston rod 22, causing it to move within the drug delivery cartridge 21, and causing the elastic connector 6 to undergo elastic deformation following the movement of the first piston rod 22. Alternatively, the drug delivery system may also include a driving device connected to the first piston rod 22, which drives the first piston rod 22 to move within the drug delivery cartridge 21, causing the elastic connector 6 to undergo elastic deformation following the movement of the first piston rod 22.

[0101] In one specific embodiment, refer to Figure 3 and Figure 4 The driving device includes a handle body 71, a limiting structure 72, and a guide part 73; the end of the first piston rod 22 is fixedly connected to the handle body 71.

[0102] The limiting structure 72 is disposed inside the handle body 71, and the guiding direction of the guide part 73 is consistent with the length direction of the first piston rod 22;

[0103] One end of the guide portion 73 is fixed, and the other end of the guide portion 73 cooperates with the limiting structure 72 so that the handle body 71 can move along the guide portion 73.

[0104] In this embodiment, the structure of the driving device is defined. The driving device includes a handle body 71, a limiting structure 72, and a guide part 73. Medical personnel can manipulate the handle body 71 to move the first piston rod 22 inside the drug delivery cartridge 21.

[0105] Specifically, the drive unit includes a handle body 71, as shown in the reference. Figure 1The handle body 71 is similar to a trigger structure. The handle body 71 can be hollow inside. A limiting structure 72 is set inside the handle body 71. The limiting structure 72 cooperates with the guide part 73. The handle body 71 moves in a direction along the guide part 73, so that the first piston rod 22 moves inside the drug delivery cartridge 21.

[0106] Specifically, one end of the guide portion 73 is fixed, for example, one end of the guide portion 73 can be fixed to the liquid injection device 3, or the other end of the guide portion 73 can be fixed to the liquid supply device 1 (described later).

[0107] The guiding direction of the guide part 73 is consistent with the length direction of the first piston rod 22. When the medical staff operates the handle body 71, the handle body 71 can move back and forth along the guide part 73, thereby transmitting the force to the first piston rod 22, so that the first piston rod 22 moves in the drug delivery cartridge 21.

[0108] In one specific embodiment, refer to Figure 4 The limiting structure 72 includes a first limiting plate 721 and a second limiting plate 722. The first limiting plate 721 and the second limiting plate 722 are both fixed inside the handle body 71, and the first limiting plate 721 and the second limiting plate 722 are spaced apart and arranged opposite to each other. A limiting channel 723 is provided between the first limiting plate 721 and the second limiting plate 722, and the limiting channel 723 extends in the length direction of the first piston rod 22.

[0109] The guide portion 73 includes a guide plate 731 and a protrusion 732 disposed on the guide plate 731, the protrusion 732 being engaged within the limiting channel 723.

[0110] Specifically, the limiting structure 72 includes a first limiting plate 721 and a second limiting plate 722, wherein the first limiting plate 721 and the second limiting plate 722 are fixed inside the handle body 71 and are arranged opposite to each other, and a limiting channel 723 is formed between the first limiting plate 721 and the second limiting plate 722, wherein the length direction of the limiting channel 723 is consistent with the length direction of the first piston rod 22.

[0111] The guide portion 73 includes a guide plate 731 and a protrusion 732 disposed on the guide plate 731. The protrusion 732 can be engaged in the limiting channel 723. The protrusion 732 and the limiting channel 723 cooperate. When the handle body 71 is operated, the limiting structure 72 slides along the protrusion 732, so that the handle body 71 slides back and forth along the guide portion 73 to push the first piston rod 22 to move back and forth in the drug delivery cartridge 21.

[0112] In an optional embodiment, a spring is provided inside the handle body 71, and the elastic deformation direction of the spring is consistent with the length direction of the first piston rod 22. By providing a spring inside the handle body 71, the pressing feel is improved when medical staff operate the drive device.

[0113] In one specific embodiment, refer to Figures 1-7 The drug delivery system further includes a liquid supply device 1 and an elastic component 4, wherein the liquid supply device 1 is used to store liquid;

[0114] The liquid supply device 1 has a liquid supply port 12;

[0115] The administration cartridge 21 has a first port 211 and a second port 212, and the first piston rod 22 is disposed inside the administration cartridge 21 through the second port 212;

[0116] The liquid injection device 3 has an inlet port 31 and an outlet port 32, and the outlet port 32 is used to connect to external devices.

[0117] The elastic component 4 is disposed on the liquid supply port 12 and blocks the liquid supply port 12, the first port 211 and the liquid inlet port 31;

[0118] Reference Figure 7 When the first piston rod 22 moves away from the first port 211, the elastic member 4 undergoes a first type of elastic deformation, and the liquid in the liquid supply device 1 is drawn into the drug delivery cylinder 21.

[0119] Reference Figure 6 When the first piston rod 22 moves toward the first port 211, the elastic component 4 undergoes a second type of elastic deformation, and the liquid in the drug delivery device 2 is forced into the injection device 3.

[0120] In this embodiment, the first port 211 of the drug delivery cartridge 21 is located on one side of the liquid supply port 12 of the liquid supply device 1, the inlet port 31 of the injection device 3 is located on the other side of the liquid supply port 12 of the liquid supply device 1, and the elastic member 4 is located on the liquid supply port 12. (Refer to...) Figure 5 In the unused state (when the first piston rod 22 is not moved, i.e., in the normal state), the elastic component 4 blocks the liquid supply port 12, the first port 211, and the liquid inlet port 31. That is, the liquid supply port 12 and the first port 211 are not connected, the first port 211 and the liquid inlet port 31 are not connected, and the liquid supply port 12 and the liquid inlet port 31 are also not connected. In other words, in the unused state, the liquid supply device 1 cannot supply liquid to the drug delivery cartridge 21, and the drug delivery device 2 cannot inject liquid into the liquid injection device 3.

[0121] Reference Figure 7 When the first piston rod 22 moves within the administration cartridge 21 under external force, and moves away from the first port 211 (i.e., when the first piston rod 22 is pulled), the air pressure inside the administration cartridge 21 decreases (below atmospheric pressure), while the air pressure inside the liquid supply device 1 is atmospheric pressure. Under the influence of this air pressure difference, the liquid in the liquid supply device 1 tends to flow towards the administration device 2 under atmospheric pressure. Furthermore, due to the air pressure difference, the elastic component 4 undergoes a first type of elastic deformation. At this time, the liquid supply port 12 and the first port 211 are in a connected state, allowing the liquid in the liquid supply device 1 to be smoothly drawn into the administration cartridge 21. Therefore, in this embodiment, under the influence of air pressure and the elastic deformation of the elastic component 4, the liquid in the liquid supply device 1 can be smoothly and directionally drawn into the administration cartridge 21.

[0122] Reference Figure 6 When the first piston rod 22 moves within the administration cartridge 21 under external force, and the first piston rod 22 moves towards the first port 211, and there is already liquid in the administration cartridge 21, the principle of liquid pressure is utilized to push the liquid from a high-pressure area to a low-pressure area through the action of force. That is, when the first piston rod 22 is pushed, the liquid in the administration device 2 tends to flow into the injection device 3. In addition, when the first piston rod 22 is pushed, the elastic component 4 undergoes a second type of elastic deformation under the action of liquid pressure. At this time, the first port 211 and the injection port are connected, allowing the liquid in the administration device 2 to flow into the injection device 3. Therefore, in this embodiment, under the action of liquid pressure and the elastic deformation of the elastic component 4, the liquid in the administration device 2 can flow smoothly and directionally into the injection device 3.

[0123] When an external force is applied, the first piston rod 22 moves back and forth in the drug delivery cylinder 21, so that the elastic component 4 can continuously undergo the first type of elastic deformation and the second type of elastic deformation (i.e., the elastic component 4 alternately produces the first type of elastic deformation and the second type of elastic deformation), the liquid supply device 1 can continuously supply liquid to the drug delivery device 2, and the drug delivery device 2 can continuously inject liquid into the liquid injection device 3.

[0124] It should be noted that when the device is not in use, and the liquid supply device 1 contains liquid while the drug delivery device 2 does not contain liquid, and the first piston rod 22 is located away from the first port 211, pushing the first piston rod 22 does not achieve the purpose of injecting liquid into the line injection device 3, but rather serves to expel the air from the drug delivery cylinder 21.

[0125] In one specific embodiment, refer to Figures 5-7The elastic member 4 has a first surface 41 and a second surface 42 disposed opposite to each other, and a side surface 43 connected to the first surface 41 and the second surface 42.

[0126] The first port 211 is in contact with the first surface 41 and the side surface 43, the liquid inlet port 31 is in contact with the first surface 41, and the liquid supply port 12 is in contact with the second surface 42.

[0127] In this embodiment, when the first port 211 of the drug delivery device 2 is located on one side of the liquid supply port, and the liquid inlet port 31 of the injection device 3 is located on the other side of the liquid supply port, and the elastic member 4 is located on the liquid supply port, the positioning of the first port 211 relative to the elastic member 4, the positioning of the liquid inlet port 31 relative to the elastic member 4, and the positioning of the liquid supply port relative to the elastic member 4 are all defined. This facilitates the drug delivery device 2 in absorbing liquid from the liquid supply device and in supplying liquid to the injection device 3. Alternatively, defining the relative positions of the first port 211, the liquid inlet port 31, and the liquid supply port allows the elastic member 4 to undergo a first elastic deformation, facilitating the drug delivery device 2 in absorbing liquid from the liquid supply device. Furthermore, defining the relative positions of the first port 211, the liquid inlet port 31, and the liquid supply port allows the elastic member 4 to undergo a second elastic deformation, facilitating the drug delivery device 2 in supplying liquid to the injection device 3.

[0128] Specifically, both the first port 211 and the liquid inlet port 31 are in contact with the first surface 41 of the elastic component 4. Under the action of external force, the first piston rod 22 moves towards the first port 211. Under the action of liquid pressure, the first surface 41 of the elastic component 4 undergoes elastic deformation, so that the first port 211 and the first surface 41 of the elastic component 4 form a second liquid flow channel, and the liquid inlet port 31 and the first surface 41 of the elastic component 4 form a first liquid flow channel. The liquid in the drug delivery device 2 is injected into the injection device 3 through the second liquid flow channel and the first liquid flow channel.

[0129] Specifically, the liquid supply port contacts the second surface 42 of the elastic component 4, and the first port 211 contacts the side surface 43 of the elastic component 4. Under the action of external force, the first piston rod 22 moves away from the first port 211. Under the action of air pressure, the second surface 42 of the elastic component 4 undergoes elastic deformation, and a first liquid flow channel is formed between the liquid supply port and the second surface 42 of the elastic component 4. At the same time, the length dimension of the elastic component 4 becomes shorter, and a second liquid flow channel is formed between the side end face and the first port 211. The drug delivery device 2 can draw the liquid in the liquid supply device into its interior.

[0130] In one specific embodiment, refer to Figure 6 When the first piston rod 22 moves toward the first port 211, the first surface 41 is recessed away from the liquid inlet port 31 and the first port 211, so that a first opening 51 is formed between the first port 211 and the first surface 41, and a second opening 52 is formed between the liquid inlet port 31 and the first surface 41, and the first opening 51 and the second opening 52 are connected.

[0131] In this embodiment, when the first piston rod 22 moves toward the first port 211, the elastic member 4 undergoes a second type of elastic deformation. Specifically, under the action of liquid pressure, the first surface 41 of the elastic member 4 is recessed away from the liquid inlet port 31 and the first port 211, so that a first opening 51 is formed between the first port 211 and the first surface 41, and a second opening 52 is formed between the liquid inlet port 31 and the first surface 41. The first opening 51 and the second opening 52 are connected. Under the action of liquid pressure, the liquid in the drug delivery device 2 can flow into the injection device 3 through the first opening 51 and the second opening 52.

[0132] In one specific embodiment, refer to Figure 7 When the first piston rod 22 moves away from the first port 211, the second surface 42 is recessed away from the liquid supply port 12, so that a third opening 53 is formed between the liquid supply port 12 and the second surface 42, and a fourth opening 54 is formed between the side surface 43 and the first port 211. The third opening 53 and the fourth opening 54 are connected.

[0133] In this embodiment, when the first piston rod 22 moves away from the first port 211, the elastic member 4 undergoes a first type of elastic deformation. Specifically, under the action of air pressure, the second surface 42 of the elastic member 4 is recessed away from the liquid supply port 12, so that a third opening 53 is formed between the liquid supply port 12 and the second surface 42, and a fourth opening 54 is formed between the side surface 43 and the first port 211. The third opening 53 and the fourth opening 54 are connected. Under the action of air pressure, the drug delivery device 2 can draw the liquid in the liquid supply device 1 into its interior.

[0134] In one specific embodiment, refer to Figure 1 The liquid supply device 1 includes a connecting part 11 and a liquid supply body 10. The connecting part 11 has a first mounting port 111, a second mounting port 112 and a third mounting port 113. The liquid supply body 10 is mounted on the connecting part 11 through the first mounting port 111 and is detachably connected to the connecting part 11.

[0135] The drug delivery device 2 is disposed on the connecting part 11 through the second mounting port 112 and is fixedly connected to the connecting part 11;

[0136] The liquid injection device 3 is mounted on the connecting part 11 through the third mounting port 113 and is fixedly connected to the connecting part 11.

[0137] In this embodiment, the liquid supply device 1 includes a connecting part 11 and a liquid supply body 10, wherein the connecting part 11 serves to connect the liquid supply body 10, the drug delivery device 2 and the injection device 3.

[0138] Specifically, the liquid supply body 10 and the connecting part 11 are detachably connected, facilitating the replacement of the liquid supply body 10. For example, the liquid supply body 10 can be replaced promptly when different types of liquid medicine are needed. Specifically, the liquid supply body 10 can extend into the connecting part 11 through the first mounting port 111. On the one hand, this facilitates the installation of the elastic member 4 on the liquid supply port 12 of the liquid supply body 10, and facilitates the drug delivery device 2 to draw liquid from the liquid supply body 10. On the other hand, it makes the structure of the drug delivery system more compact.

[0139] Specifically, a second mounting port 112 is provided on the connecting part 11, through which the drug delivery device 2 can extend into the connecting part 11 and be fixedly connected to it. For example, the drug delivery device 2 can be fixed to the connecting part 11 by an interference fit. The fact that the drug delivery device 2 extends into the connecting part 11 through the second mounting port 112 facilitates the drug delivery device 2 to draw liquid from the liquid supply body 10 and to inject liquid into the liquid injection device 3, and also makes the structure of the drug delivery system more compact.

[0140] Specifically, a third mounting port 113 is provided on the connecting part 11, through which the injection device 3 can extend into the connecting part 11 and be fixedly connected to the connecting part 11. For example, the injection device 3 can be fixed to the connecting part 11 by interference fit. The injection device 3 extending into the connecting part 11 through the third mounting port 113 facilitates the injection of liquid from the drug delivery device 2 into the injection device 3, and also makes the structure of the drug delivery system more compact.

[0141] In one specific embodiment, refer to Figure 1 The connecting part 11 is a cylindrical structure, and the open end of the cylindrical structure is the first mounting port 111;

[0142] The cylindrical structure is provided with a mounting part, the peripheral surface of the mounting part is connected to the inner peripheral surface of the cylindrical structure, and the mounting part is provided with a plug-in hole that penetrates the mounting part;

[0143] The liquid supply body 10 is disposed on the mounting part through the first mounting port 111 and the plug hole in sequence.

[0144] In this embodiment, the connecting part 11 is defined as a cylindrical structure, and the open end of the cylindrical structure itself constitutes the first mounting port 111. In the drug delivery system, the open end of the cylindrical structure faces downward, which facilitates the insertion of the liquid supply body 10 into the connecting part 11. When the open end of the cylindrical structure is set downward, a second mounting port 112 and a third mounting port 113 are opened at the top of the cylindrical structure to facilitate the installation of the drug delivery device 2 and the liquid injection device 3.

[0145] In this embodiment, the liquid supply body 10 is connected to the connecting part 11 by cooperating with the insertion hole. Specifically, the cylindrical structure is provided with an installation part, which can be a disc-shaped structure with an insertion hole. The insertion hole penetrates the installation part in the thickness direction, and the liquid supply body 10 can be detachably connected to the connecting part 11 by passing through the first mounting port 111 and the insertion hole once.

[0146] In one specific embodiment, refer to Figure 5 The liquid supply port 12 of the liquid supply body 10 is flush with the first mounting surface of the mounting part. The first mounting surface is the surface of the mounting part near the liquid injection device 3. The elastic member 4 is disposed on the first mounting surface.

[0147] In this embodiment, the positional relationship between the liquid supply port 12 and the first mounting surface is defined. The liquid supply port 12 does not protrude from the first mounting surface, but is flush with the surface of the first mounting surface, so that the elastic member 4 can be smoothly mounted on the first mounting surface. When the liquid supply port 12 protrudes from the first mounting surface of the mounting part, it is impossible to mount the elastic member 4.

[0148] In an optional embodiment, referring to the figure, the drug delivery device 2, the injection device 3, and the connecting part 11 are an integral structural component, which facilitates the assembly of the drug delivery system by medical personnel. For example, the drug delivery device 2, the injection device 3, and the connecting part 11 can be made of medical-grade plastic, and the drug delivery device 2, the injection device 3, and the connecting part 11 are integrally molded by injection molding.

[0149] In an optional embodiment, refer to Figures 5-7 The elastic component 4 covers the liquid supply port 12, and the side surface 43 of the elastic component 4 contacts the inner wall of the cylindrical structure. When the drug delivery system is not in use, the elastic component 4 has the effect of sealing the inside of the drug delivery system.

[0150] In an optional embodiment, referring to the figure, the liquid supply body 10 is a syringe. When there is no liquid inside the liquid supply body 10, the liquid supply body 10 is detached, and liquid is drawn from the outside by pulling the second piston rod 14 on the syringe. For example, the liquid supply body 10 includes a liquid supply cylinder 13 and a second piston rod 14. By pulling the second piston rod 14, the liquid supply cylinder 13 draws liquid to supply liquid into the drug delivery device 2.

[0151] In an optional embodiment, refer to Figure 5 The elastic component 4 is defined as a silicone pad or a rubber pad, wherein the silicone pad and the rubber pad have good elasticity and are easy to produce elastic deformation under the action of liquid pressure or air pressure.

[0152] The above embodiments mainly describe the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. For the sake of brevity, they will not be elaborated here.

[0153] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A drug delivery system, characterized by include: Drug delivery device (2), liquid injection device (3) and elastic connector (6); The drug delivery device (2) includes a drug delivery cylinder (21) and a first piston rod (22), the first piston rod (22) being slidably disposed inside the drug delivery cylinder (21); when the first piston rod (22) is pushed, the drug delivery device (2) can inject liquid into the liquid injection device (3); The drug delivery cartridge (21) includes a cartridge body (213) with graduation lines and a limiting part (214). The limiting part (214) is disposed on the cartridge body (213), and the position of the limiting part (214) can be adjusted. One end of the elastic connector (6) is fixed, and the other end of the elastic connector (6) is fixed on the limiting part (214); When the limiting part (214) is located at the first position of the cylinder body (213) and the first piston rod (22) is pushed, the elastic connector (6) generates a first compression amount, and the amount of liquid injected by the drug delivery device (2) into the liquid injection device (3) is a first parameter value. When the limiting part (214) is located in the second position of the cylinder body (213) and the first piston rod (22) is pushed, the elastic connector (6) generates a second compression amount, and the amount of liquid injected by the drug delivery device (2) into the liquid injection device (3) is a second parameter value; The drug delivery system further includes a liquid supply device (1) and an elastic component (4), wherein the liquid supply device (1) is used to store liquid; The liquid supply device (1) has a liquid supply port (12); The drug delivery cartridge (21) has a first port (211) and a second port (212). The first piston rod (22) is disposed inside the drug delivery cartridge (21) through the second port (212). The first port (211) is disposed on one side of the liquid supply port (12). The axial direction of the first port (211) is perpendicular to the axial direction of the liquid supply port (12). The liquid injection device (3) has an inlet port (31) and an outlet port (32). The outlet port (32) is used to connect to an external device. The inlet port (31) is located on the other side of the supply port (12). The inlet port (31) and the supply port (12) are coaxially arranged. The elastic component (4) is disposed on the liquid supply port (12). The elastic component (4) has a first surface (41) and a second surface (42) disposed opposite to each other, and a side surface (43) connected to the first surface (41) and the second surface (42). The first port (211) is in contact with the first surface (41) and the side surface (43), the liquid inlet port (31) is in contact with the first surface (41), and the liquid supply port (12) is in contact with the second surface (42); When the first piston rod (22) is not moved, the elastic component (4) blocks the liquid supply port (12), the first port (211) and the liquid inlet port (31). The liquid supply port (12) and the first port (211) are not connected, the first port (211) and the liquid inlet port (31) are not connected, and the liquid supply port (12) and the liquid inlet port (31) are also not connected. When the first piston rod (22) moves away from the first port (211), the gas pressure in the drug delivery cartridge (21) is less than the gas pressure in the liquid supply device (1). Under the action of the gas pressure difference, the elastic component (4) undergoes a first type of elastic deformation. The first surface of the elastic component (4) that contacts the liquid supply port (12) is compressed, so that the elastic component (4) further blocks the liquid inlet port (31). Under the action of the pressure difference, the second surface (42) is recessed away from the liquid supply port (12) so that a third opening (53) is formed between the liquid supply port (12) and the second surface (42), and a fourth opening (54) is formed between the side surface (43) and the first port (211). The third opening (53) and the fourth opening (54) are connected. A first liquid flow channel is formed between the elastic member (4) and the liquid supply port (12), and a second liquid flow channel is formed between the elastic member (4) and the first port (211). The first liquid flow channel and the second liquid flow channel are connected. The liquid in the liquid supply device (1) is drawn into the drug delivery cylinder (21) through the first liquid flow channel and the second liquid flow channel. When the first piston rod (22) moves toward the first port (211), the liquid in the drug delivery device (2) tends to flow into the injection device (3). Under the action of liquid pressure, the elastic component (4) undergoes a second elastic deformation. The second surface of the elastic component (4) that contacts the liquid inlet port in the injection device (3) is compressed, causing the elastic component to further block the liquid supply port (12). Under the action of the liquid pressure, the first surface (41) is recessed away from the liquid inlet port (31) and the first port (211), so that a first opening (51) is formed between the first port (211) and the first surface (41), a second opening (52) is formed between the liquid inlet port (31) and the first surface (41), the first opening (51) and the second opening (52) are connected, a third liquid flow channel is formed between the elastic member (4) and the first port (211), and a fourth liquid flow channel is formed between the elastic member (4) and the liquid inlet port (31), the third liquid flow channel and the fourth liquid flow channel are connected, and the liquid in the drug delivery device (2) is pressed into the injection device (3) through the third liquid flow channel and the fourth liquid flow channel.

2. The drug delivery system according to claim 1, characterized in that, The first position of the cylinder body (213) is closer to the liquid injection device (3) than the second position of the cylinder body (213), and the first parameter value is greater than the second parameter value.

3. The drug delivery system according to claim 1, characterized in that, The limiting part (214) is slidably disposed on the cylindrical body (213); or the limiting part (214) is rotatably disposed on the cylindrical body (213).

4. The drug delivery system according to claim 1 or 3, characterized in that, The limiting part (214) is sleeved on the cylinder body (213); The outer circumferential surface of the cylinder body (213) is provided with a first thread structure, and the inner circumferential surface of the limiting part (214) is provided with a second thread structure, and the first thread structure and the second thread structure cooperate with each other.

5. The drug delivery system according to claim 1 or 3, characterized in that, The limiting part (214) is embedded in the cylindrical body (213); Along the length of the cylindrical body (213), a recessed groove is provided on the outer surface of the cylindrical body (213), and a protrusion is provided on the limiting part (214), which cooperates with the recessed groove.

6. The drug delivery system according to claim 1, characterized in that, The drug delivery system further includes a driving device connected to the first piston rod (22) to drive the first piston rod (22) to slide within the drug delivery cylinder (21).

7. The drug delivery system according to claim 6, characterized in that, The driving device includes a handle body (71), a limiting structure (72), and a guide part (73); the end of the first piston rod (22) is fixedly connected to the handle body (71); The limiting structure (72) is disposed inside the handle body (71), and the guiding direction of the guide part (73) is consistent with the length direction of the first piston rod (22); One end of the guide (73) is fixed, and the other end of the guide (73) cooperates with the limiting structure (72) so that the handle body (71) can move along the guide (73).

8. The drug delivery system according to claim 7, characterized in that, The limiting structure (72) includes a first limiting plate (721) and a second limiting plate (722). The first limiting plate (721) and the second limiting plate (722) are both fixed inside the handle body (71), and the first limiting plate (721) and the second limiting plate (722) are spaced apart and arranged opposite to each other. There is a limiting channel (723) between the first limiting plate (721) and the second limiting plate (722), and the limiting channel (723) extends in the length direction of the first piston rod (22).

9. The drug delivery system according to claim 8, characterized in that, The guide portion (73) includes a guide plate (731) and a protrusion (732) disposed on the guide plate (731), the protrusion (732) being engaged within the limiting channel (723).

10. The drug delivery system according to claim 1, characterized in that, The liquid supply device (1) includes a connecting part (11) and a liquid supply body (10). The connecting part (11) has a first mounting port (111), a second mounting port (112) and a third mounting port (113). The liquid supply body (10) is mounted on the connecting part (11) through the first mounting port (111) and is detachably connected to the connecting part (11). The drug delivery device (2) is disposed on the connecting part (11) through the second mounting port (112) and is fixedly connected to the connecting part (11); The liquid injection device (3) is mounted on the connecting part (11) through the third mounting port (113) and is fixedly connected to the connecting part (11).

11. The drug delivery system according to claim 10, characterized in that, The connecting part (11) is a cylindrical structure, and the open end of the cylindrical structure is the first mounting port (111). The cylindrical structure is provided with a mounting part, the peripheral surface of the mounting part is connected to the inner peripheral surface of the cylindrical structure, and the mounting part is provided with a plug-in hole that penetrates the mounting part; The liquid supply body (10) is disposed on the mounting part through the first mounting port (111) and the plug hole in sequence.

12. The drug delivery system according to claim 11, characterized in that, The liquid supply port (12) of the liquid supply body (10) is flush with the first mounting surface of the mounting part. The first mounting surface is the surface of the mounting part near the liquid injection device (3). The elastic member (4) is disposed on the first mounting surface.

Images