Drug delivery system

Abstract

This application provides a drug delivery system. The system includes: a liquid supply device, a drug delivery device, an injection device, and an elastic component. The liquid supply device has a liquid supply port; the drug delivery device includes a drug delivery cylinder and a first piston rod. The drug delivery cylinder has a first port and a second port, the first port being located on one side of the liquid supply port, and the first piston rod being disposed within the cylinder through the second port; the injection device has an inlet port and an outlet port, the inlet port being located on the other side of the liquid supply port; the elastic component is disposed on the liquid supply port and blocks the liquid supply port, the first port, and the inlet port; when the first piston rod moves away from the first port, the elastic component undergoes a first elastic deformation, and liquid from the liquid supply device is drawn into the drug delivery cylinder; when the first piston rod moves towards the first port, the elastic component undergoes a second elastic deformation, and liquid from the drug delivery device is forced into the injection device.

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. However, during the administration process, there may be insufficient medication, requiring the medication to be retrieved and administered again, which is time-consuming and laborious, affecting the efficacy and efficiency of the medication. Therefore, a drug delivery system is proposed to solve the above-mentioned problems. Summary of the Invention

[0003] The purpose of this application is to provide a new technology solution for a drug delivery system.

[0004] In a first aspect, this application provides a drug delivery system. The drug delivery system includes: a liquid supply device, a drug delivery device, an injection device, and an elastic component;

[0005] The liquid supply device has a liquid supply port and is used to store liquid.

[0006] The drug delivery device includes a drug delivery cylinder and a first piston rod. The drug delivery cylinder has a first port and a second port. The first port is located on one side of the liquid supply port, and the first piston rod is located inside the drug delivery cylinder through the second port.

[0007] The liquid injection device has an inlet port and an outlet port. The inlet port is located on the other side of the liquid supply port, and the outlet port is used to connect to external equipment.

[0008] The elastic component is disposed on the liquid supply port and blocks the liquid supply port, the first port and the liquid inlet port;

[0009] When the first piston rod moves away from the first port, the elastic component undergoes a first elastic deformation, and the liquid in the liquid supply device is drawn into the drug delivery cylinder.

[0010] When the first piston rod moves toward the first port, the elastic component undergoes a second elastic deformation, and the liquid in the drug delivery device is forced into the injection device.

[0011] Optionally, when the elastic component undergoes a first elastic deformation, the elastic component blocks the liquid inlet port, a first liquid flow channel is formed between the elastic component and the liquid supply port, and a second liquid flow channel is formed between the elastic component and the first port, with the first liquid flow channel and the second liquid flow channel communicating with each other.

[0012] Optionally, when the elastic component undergoes a second elastic deformation, the elastic component blocks the liquid supply port, a third liquid flow channel is formed between the elastic component and the first port, and a fourth liquid flow channel is formed between the elastic component and the liquid inlet port, the third liquid flow channel and the fourth liquid flow channel are connected.

[0013] 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;

[0014] 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.

[0015] 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.

[0016] 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.

[0017] 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.

[0018] The drug delivery device is disposed on the connecting part through the second mounting port and is fixedly connected to the connecting part;

[0019] The injection device is mounted on the connecting part through the third mounting port and is fixedly connected to the connecting part.

[0020] Optionally, the drug delivery device, the injection device, and the connecting part are an integral structural component.

[0021] Optionally, the connecting part is a cylindrical structure, and the open end of the cylindrical structure is the first mounting port;

[0022] 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;

[0023] The liquid supply body is sequentially mounted on the mounting part via the first mounting port and the insertion hole.

[0024] 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.

[0025] Optionally, the elastic member covers the liquid supply port, and the side surface of the elastic member contacts the inner wall of the cylindrical structure.

[0026] Optionally, the liquid supply body is a syringe.

[0027] Optionally, the elastic component is a silicone pad or a rubber pad.

[0028] Optionally, the drug delivery system further includes a drive device connected to the drug delivery device to drive the first piston rod to move.

[0029] Optionally, the driving device includes a handle body, a limiting structure, and a guide portion; the end of the first piston rod away from the first port is fixedly connected to the handle body.

[0030] 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;

[0031] One end of the guide portion is fixed to the liquid supply device or the liquid injection device, and the other end of the guide portion cooperates with the limiting structure so that the handle body can move along the guide portion.

[0032] Optionally, the drug delivery cylinder includes a cylinder body and a limiting part, the limiting part being sleeved on the cylinder body, and the cylinder body and the limiting part being threadedly connected;

[0033] The drug delivery system further includes an elastic connector, which is sleeved on the first piston rod. One end of the elastic connector is fixedly connected to the handle body, and the other end of the elastic connector is fixedly connected to the limiting part.

[0034] According to an embodiment of this application, a drug delivery device is provided. The drug delivery device includes a liquid supply device, a drug delivery device, and an injection device. The drug delivery device includes a drug delivery cylinder and a first piston rod. The first piston rod can move back and forth within the drug delivery cylinder. By utilizing the pressure difference (liquid pressure and air pressure) and the elastic deformation of the elastic component, the drug delivery device continuously delivers drugs to the drug delivery device, and the drug delivery device continuously injects drugs into the injection device.

[0035] 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

[0036] 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.

[0037] Figure 1 The diagram shown is a structural diagram of the drug delivery system provided in an embodiment of this application.

[0038] 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).

[0039] Figure 3 The diagram shown is a partial structural diagram of the drug delivery system provided in an embodiment of this application.

[0040] Figure 4 The diagram shown is a structural diagram of the handle body provided in an embodiment of this application.

[0041] Figure 5 The diagram illustrates the principle of the drug delivery system provided in this application embodiment. Figure 1 .

[0042] Figure 6 The diagram illustrates the principle of the drug delivery system provided in this application embodiment. Figure 2 .

[0043] Figure 7 The diagram illustrates the principle of the drug delivery system provided in this application embodiment. Figure 3 .

[0044] Explanation of reference numerals in the attached figures:

[0045] 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;

[0046] 2. Drug delivery device; 21. Drug delivery cylinder; 22. First piston rod; 211. First port; 212. Second port; 213. Cylinder body; 214. Limiting part;

[0047] 3. Liquid injection device; 31. Liquid inlet port; 32. Liquid outlet port;

[0048] 4. Elastic component; 41. First surface; 42. Second surface; 43. Side surface;

[0049] 51. First opening; 52. Second opening; 53. Third opening; 54. Fourth opening;

[0050] 6. Flexible connectors;

[0051] 71. Handle body; 72. Limiting structure; 73. Guide part; 721. First plate; 722. Second plate; 723. Limiting channel; 731. Guide plate; 732. Protrusion. Detailed Implementation

[0052] Various exemplary embodiments of this 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 this application.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] This application provides a drug delivery system. (Refer to...) Figures 1-7 The drug delivery system includes: a liquid supply device 1, a drug delivery device 2, a liquid injection device 3, and an elastic component 4.

[0058] The liquid supply device 1 has a liquid supply port 12 and is used to store liquid.

[0059] The drug delivery device 2 includes a drug delivery cylinder 21 and a first piston rod 22. The drug delivery cylinder 21 has a first port 211 and a second port 212. The first port 211 is located on one side of the liquid supply port 12, and the first piston rod 22 is located inside the drug delivery cylinder 21 through the second port 212.

[0060] The liquid injection device 3 has an inlet port 31 and an outlet port 32. The inlet port 31 is located on the other side of the liquid supply port 12, and the outlet port 32 is used to connect to external equipment.

[0061] Reference Figure 5 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.

[0062] Reference Figure 6 When the first piston rod 22 moves away from the first port 211, the elastic component 4 undergoes a first elastic deformation, and the liquid in the liquid supply device 1 is drawn into the drug delivery cylinder 21.

[0063] Reference Figure 7 When the first piston rod 22 moves toward the first port 211, the elastic member 4 undergoes a second elastic deformation, and the liquid in the drug delivery device 2 is forced into the injection device 3.

[0064] In this embodiment, the drug delivery system mainly includes a liquid supply device 1, a drug delivery device 2, a liquid injection device 3, and an elastic component 4.

[0065] The liquid supply device 1 stores liquid, such as a drug solution, and continuously supplies liquid to the drug delivery device 2. The drug delivery device 2 continuously injects liquid into the infusion device 3. The infusion device 3 is connected to an external device for continuous infusion into that external device. The external device can be a balloon or similar device.

[0066] In this embodiment, the drug delivery device 2 includes a drug delivery cylinder 21 and a first piston rod 22. The first piston rod 22 can move back and forth inside the drug delivery cylinder 21. By moving back and forth inside the drug delivery cylinder 21, the pressure difference (liquid pressure and air pressure) and the elastic deformation of the elastic component 4 are utilized to achieve the purpose of continuously delivering drugs to the drug delivery device 2 through the liquid supply device 1 and continuously injecting liquid into the liquid injection device 3 through the drug delivery device 2.

[0067] Specifically, the first port 211 of the drug delivery cylinder 21 is located on one side of the liquid supply port 12 of the liquid supply device 1, and 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. The elastic component 4 is located on the liquid supply port 12. In the non-use 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 inlet port 31. That is, the liquid supply port 12 and the first port 211 are not connected, the first port 211 and the inlet port 31 are not connected, and the liquid supply port 12 and the inlet port 31 are also not connected. In other words, in the non-use state, the liquid supply device 1 cannot supply liquid to the drug delivery cylinder 21, and the drug delivery device 2 cannot inject liquid into the injection device 3.

[0068] When the first piston rod 22 moves within the drug delivery cylinder 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 drug delivery cylinder 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 drug delivery device 2 under atmospheric pressure. Furthermore, due to the air pressure difference, the elastic component 4 undergoes a first 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 drug delivery cylinder 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 drug delivery cylinder 21.

[0069] When the first piston rod 22 moves within the drug delivery cylinder 21 under external force, and the first piston rod 22 moves towards the first port 211, and there is already liquid in the drug delivery cylinder 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 drug delivery 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 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 drug delivery 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 drug delivery device 2 can flow smoothly and directionally into the injection device 3.

[0070] 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 elastic deformation and the second elastic deformation (i.e., the elastic component 4 alternately produces the first elastic deformation and the second 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.

[0071] 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.

[0072] In one specific embodiment, refer to Figure 7 When the elastic component 4 undergoes a first elastic deformation, the elastic component 4 blocks the liquid inlet port 31, a first liquid flow channel is formed between the elastic component 4 and the liquid supply port 12, and a second liquid flow channel is formed between the elastic component 4 and the first port 211, and the first liquid flow channel and the second liquid flow channel are connected.

[0073] In this embodiment, under the action of external force, the first piston rod 22 is pulled. Under the action of air pressure, the elastic component 4 produces a first elastic deformation, and the contact between the elastic component 4 and the liquid inlet port 31 becomes tighter. After the elastic component 4 produces the first elastic deformation, a first liquid flow channel is formed between the elastic component 4 and the liquid supply port 12, and a second liquid flow channel is formed between the elastic component 4 and the first port 211.

[0074] Specifically, under the action of air pressure, a gap is generated between the elastic component 4 and the liquid supply port 12 to form a first liquid flow channel; and under the action of air pressure, a gap is also generated between the elastic component 4 and the first port 211 to form a second liquid flow channel.

[0075] The first and second liquid flow channels are connected. When the first piston rod 22 is pulled, under the action of air pressure, the drug delivery device 2 can draw the liquid in the supply device 1 into its drug delivery cylinder 21 through the first and second liquid flow channels. In addition, because the elastic component 4 has a tighter contact with the liquid inlet port 31, the liquid in the supply device 1 cannot flow into the injection device 3.

[0076] In this embodiment, under the action of air pressure, the elastic component 4 forms a liquid flow channel between the liquid supply port 12 and the first port 211, so that the liquid in the liquid supply device 1 is drawn into the drug delivery device 2.

[0077] It should be noted that this embodiment does not limit the shape of the elastic member 4 to undergo elastic deformation. As long as 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, and the first liquid flow channel and the second liquid flow channel are connected.

[0078] In one specific embodiment, refer to Figure 6 As shown, when the elastic component 4 undergoes a second elastic deformation, the elastic component 4 blocks the liquid supply port 12, a third liquid flow channel is formed between the elastic component 4 and the first port 211, and a fourth liquid flow channel is formed between the elastic component 4 and the liquid inlet port 31, and the third liquid flow channel and the fourth liquid flow channel are connected.

[0079] In this embodiment, the drug delivery device 2 has already drawn liquid in order to realize how to inject the liquid in the drug delivery device 2 into the injection device 3.

[0080] Specifically, under the action of external force, the first piston rod 22 is pushed. Under the action of liquid pressure, the elastic component 4 produces a second elastic deformation, and the contact between the elastic component 4 and the liquid supply port 12 becomes tighter. After the elastic component 4 produces the second elastic deformation, a third liquid flow channel is formed between the elastic component 4 and the first port 211, and a fourth liquid flow channel is formed between the elastic component 4 and the liquid inlet port 31.

[0081] Specifically, under the action of liquid pressure, a gap is generated between the elastic component 4 and the first port 211 to form a third liquid flow channel; and under the action of liquid pressure, a gap is also generated between the elastic component 4 and the liquid inlet port 31 to form a fourth liquid flow channel.

[0082] The third and fourth liquid flow channels are connected. When the first piston rod 22 is pushed, under the action of liquid pressure, the drug delivery device 2 can inject the liquid inside into the injection device 3 through the third and fourth liquid flow channels. In addition, because the elastic component 4 has a tighter contact with the liquid supply port 12, the liquid in the liquid supply device 1 cannot flow into the drug delivery device 2 and the injection device 3.

[0083] In this embodiment, under the action of liquid pressure, the elastic component 4 forms a liquid flow channel between the first port 211 and the liquid inlet port 31, so that the liquid in the drug delivery device 2 is injected into the liquid injection device 3.

[0084] It should be noted that this embodiment does not limit the shape of the elastic member 4 to undergo elastic deformation. As long as 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, and the third liquid flow channel and the fourth liquid flow channel are connected.

[0085] In one specific embodiment, refer to Figure 1 , Figures 5-7 The 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.

[0086] 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.

[0087] In this embodiment, when the first port 211 of the drug delivery device 2 is located on one side of the liquid supply port 12, and the liquid inlet port 31 of the injection device 3 is located on the other side of the liquid supply port 12, and the elastic member 4 is located on the liquid supply port 12, 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 12 relative to the elastic member 4 are all defined. This facilitates the drug delivery device 2 in absorbing liquid from the liquid supply device 1 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 12 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 1. Furthermore, defining the relative positions of the first port 211, the liquid inlet port 31, and the liquid supply port 12 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.

[0088] 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.

[0089] Specifically, the liquid supply port 12 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 12 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 1 into its interior.

[0090] 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.

[0091] In this embodiment, when the first piston rod 22 moves toward the first port 211, the elastic member 4 undergoes a second 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.

[0092] 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.

[0093] In this embodiment, when the first piston rod 22 moves away from the first port 211, the elastic member 4 undergoes a first 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.

[0094] In one specific embodiment, refer to Figures 1-3 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.

[0095] 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;

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] In one specific embodiment, refer to Figure 1 The drug delivery device 2, the liquid injection device 3, and the connecting part 11 are an integral structural component.

[0102] Specifically, the drug delivery device 2, the injection device 3, and the connecting part 11 are integrated into a single structural component, facilitating 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 they are integrally molded by injection molding.

[0103] 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;

[0104] 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;

[0105] The liquid supply body 10 is disposed on the mounting part through the first mounting port 111 and the plug hole in sequence.

[0106] 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.

[0107] 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.

[0108] In one specific embodiment, refer to Figures 5-7The 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.

[0109] 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.

[0110] In one specific 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 is in contact with the inner wall of the cylindrical structure.

[0111] In this embodiment, 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.

[0112] In one specific embodiment, refer to Figures 5-7 The liquid supply body 10 is a syringe.

[0113] In this embodiment, the structure of the liquid supply body 10 is defined. 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 in liquid to supply liquid into the drug delivery device 2.

[0114] In one specific embodiment, the elastic component 4 is a silicone pad or a rubber pad.

[0115] In this embodiment, 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.

[0116] In one specific embodiment, the drug delivery system further includes a drive device connected to the drug delivery device 2 to drive the first piston rod 22 to move.

[0117] The drug delivery system provided in this application embodiment allows for manual operation of the first piston rod 22, causing it to move back and forth within the drug delivery cylinder 21. Alternatively, the drug delivery system may include a drive device connected to the first piston rod 22, which drives the first piston rod 22 to move back and forth within the drug delivery cylinder 21.

[0118] In one specific embodiment, refer to Figures 3-4 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 away from the first port 211 is fixedly connected to the handle body 71.

[0119] 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;

[0120] One end of the guide portion 73 is fixed to the liquid supply device 1 or the liquid injection device 3, 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.

[0121] 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 make the first piston rod 22 move back and forth in the drug delivery cylinder 21.

[0122] Specifically, the drive unit includes a handle body 71, as shown in the reference. Figure 1 The handle body 71 is similar to a trigger structure. The handle body 71 can be hollow inside. A limiting structure 72 and a guide part 73 are set inside the handle body 71. Since 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 back and forth inside the drug delivery cylinder 21.

[0123] In one specific embodiment, refer to Figure 4 The limiting structure 72 includes a first plate 721 and a second plate 722, wherein the first plate 721 and the second 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 plate 721 and the second plate 722, wherein the length direction of the limiting channel 723 is consistent with the length direction of the first piston rod 22.

[0124] In one specific embodiment, refer to Figure 3The 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 cylinder 21.

[0125] 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.

[0126] In one specific embodiment, refer to Figures 1-3 The drug delivery cylinder 21 includes a cylinder body 213 and a limiting part 214. The limiting part 214 is sleeved outside the cylinder body 213, and the cylinder body 213 and the limiting part 214 are threadedly connected.

[0127] The drug delivery system also includes an elastic connector 6, which is sleeved on the first piston rod 22. One end of the elastic connector 6 is fixedly connected to the handle body 71, and the other end of the elastic connector 6 is fixedly connected to the limiting part 214.

[0128] In this embodiment, the cylinder body 213 is threadedly connected to the limiting part 214. The amount of medicine to be injected into the injection device 3 each time can be controlled by adjusting the position of the limiting part 214 on the cylinder body 213. For example, if a large amount of medicine needs to be injected into the injection device 3, the limiting part 214 is rotated so that its position is closer to the first port 211 of the cylinder body 213; if a small amount of medicine needs to be injected into the injection device 3, the limiting part 214 is rotated so that its position is further away from the first port 211 of the cylinder body 213. For example, a scale line is provided on the outer circumferential surface of the cylinder body 213 to indicate the amount of medicine. The limiting part 214 can be a nut.

[0129] In this embodiment, the drug delivery system further includes an elastic connector 6. One end of the elastic connector 6 is fixedly connected to the handle body 71, and the other end is fixedly connected to the limiting part 214. When the handle body 71 is manipulated and the first piston rod 22 moves towards the first port 211, the elastic connector 6 is compressed. Since the other end of the elastic connector 6 is connected to the limiting part 214, the amount of compression of the elastic connector 6 is related to the setting position of the limiting part 214. Simultaneously, the amount of movement of the first piston rod 22 towards the first port 211 is... Related to the compression amount of the elastic connector 6, when the limiting part 214 is positioned relatively close to the first port 211, the compression amount of the elastic connector 6 is larger, and the movement amount of the first piston rod 22 towards the first port 211 is larger. At this time, the drug delivery device 2 injects more liquid into the injection device 3. When the limiting part 214 is positioned relatively far from the first port 211, the compression amount of the elastic connector 6 is smaller, and the movement amount of the first piston rod 22 towards the first port 211 is smaller. At this time, the drug delivery device 2 injects less liquid into the injection device 3.

[0130] In this embodiment, an elastic connector 6 is provided between the handle body 71 and the limiting part 214. During the process of the drug delivery device 2 injecting liquid into the injection device 3, the elastic connector 6 is compressed. After the injection is completed, under the action of the elastic restoring force of the elastic connector 6, the first piston rod 22 can automatically move away from the first port 211. At the same time, under the action of the elastic restoring force of the elastic connector 6, the elastic component 4 can also undergo the first elastic deformation, which is more conducive to the liquid supply device 1 supplying liquid into the drug delivery device 2.

[0131] Therefore, in this embodiment, by setting the limiting part 214 and the elastic connector 6, the amount of medicine injected into the injection device 3 by the drug delivery device 2 can be controlled, so as to avoid the medicine being too large or too small, which would cause difficulties in medical operation.

[0132] 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.

[0133] 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 in that, include: Liquid supply device (1), drug delivery device (2), liquid injection device (3) and elastic component (4); The liquid supply device (1) has a liquid supply port (12) and is used to store liquid; The drug delivery device (2) includes a drug delivery cylinder (21) and a first piston rod (22). The drug delivery cylinder (21) has a first port (211) and a second port (212). The first port (211) is located 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 first piston rod (22) is located inside the drug delivery cylinder (21) through the second port (212). The liquid injection device (3) has an inlet port (31) and an outlet port (32). 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 outlet port (32) is used to connect to external equipment. 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 cylinder (21) is less than the gas pressure in the liquid supply device (1). The elastic component (4) undergoes a first elastic deformation under the action of the gas pressure difference. 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 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).

3. The drug delivery system according to claim 2, characterized in that, The drug delivery device (2), the liquid injection device (3), and the connecting part (11) are an integral structural component.

4. The drug delivery system according to claim 2, 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.

5. The drug delivery system according to claim 4, 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.

6. The drug delivery system according to claim 5, characterized in that, The elastic member (4) covers the liquid supply port (12), and the side surface (43) of the elastic member (4) is in contact with the inner wall of the cylindrical structure.

7. The drug delivery system according to claim 2, characterized in that, The liquid supply body (10) is a syringe.

8. The drug delivery system according to claim 1, characterized in that, The elastic component (4) is a silicone pad.

9. The drug delivery system according to claim 1, characterized in that, The elastic component (4) is a rubber pad.

10. The drug delivery system according to claim 1, characterized in that, The drug delivery system also includes a drive device connected to the drug delivery device (2) to drive the first piston rod (22) to move.

11. The drug delivery system according to claim 10, characterized in that, The driving device includes a handle body (71), a limiting structure (72), and a guide (73); the end of the first piston rod (22) away from the first port (211) 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 to the liquid supply device (1) or the liquid injection device (3), 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).

12. The drug delivery system according to claim 11, characterized in that, The drug delivery cylinder (21) includes a cylinder body (213) and a limiting part (214). The limiting part (214) is sleeved outside the cylinder body (213), and the cylinder body (213) and the limiting part (214) are threaded together. The drug delivery system also includes an elastic connector (6), which is sleeved on the first piston rod (22). One end of the elastic connector (6) is fixedly connected to the handle body (71), and the other end of the elastic connector (6) is fixedly connected to the limiting part (214).

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