syringe

Abstract

This application relates to the field of medical devices and discloses a syringe. A first receiving cavity is provided within a shell assembly along a first direction. An injection component is at least partially located within the first receiving cavity. The injection component includes an injection tube and a pusher. The first injection cavity is provided within the injection tube along the first direction. The pusher moves within the first injection cavity along the first direction to achieve the extraction and release of medication by the injection component. The injection tube is detachably connected to the shell assembly. A moving component is located within the first receiving cavity and at one end of the pusher along the first direction. A control component is connected to the moving component and drives the moving component to move at a uniform speed along the first direction, further driving the pusher to move along the first direction. The extraction of medication by the injection component is achieved by manually pulling the pusher, and the release of medication by the injection component is achieved by the moving component automatically pushing the pusher. This provides a syringe with an injection component that can be replaced as a consumable.

Description

Technical Field

[0001] This application relates to the field of medical devices, and in particular to syringes. Background Technology

[0002] Suprachoroidal injection is a minimally invasive, targeted posterior segment drug delivery technique that injects medication into the potential cavity between the sclera and choroid to achieve precise treatment of the choroid and retina while minimizing impact on the anterior segment. Currently, the mainstream clinical method for suprachoroidal injection surgery still relies on medical staff manually pushing the syringe to infuse the medication. However, the pushing force of manual hands is affected by various subjective factors such as the operator's hand stability, force application habits, and fatigue during surgery. Maintaining a constant pushing force throughout the injection cycle is difficult, making it impossible to achieve consistently fast and precise drug delivery. This often results in inconsistent injection speeds, making it unsuitable for the stringent speed control requirements of suprachoroidal injection, and leading to significant uncertainty in clinical safety and efficacy.

[0003] To address the technical shortcomings of manual injection, such as unstable thrust and poor injection accuracy, electric injection devices have been developed. These devices rely on motor drive to achieve uniform drug delivery, precisely controlling the injection dosage and speed. This effectively avoids fluctuations in drug administration parameters caused by manual operation and fully meets the clinical precision requirements for suprachoroidal injection. However, the overall purchase cost of electric injectors on the market is high, and the core electronic control and drive components are expensive. From the perspective of clinical medical consumable cost control, it is not feasible to use the entire electric injector as a disposable consumable. If the electric injector is repeatedly sterilized and reused through high-temperature or chemical immersion, the complex and precise electronic control structure is prone to malfunctions such as circuit aging, reduced drive accuracy, and seal failure during repeated sterilization, significantly shortening the equipment's lifespan. Summary of the Invention

[0004] This application primarily addresses the technical problems of existing electric injectors, where high consumption occurs when used as disposable consumables, or where repeated use after sterilization shortens the lifespan of the device. It provides a syringe with an injection component that can be replaced as a consumable.

[0005] To address the aforementioned technical problems, this application provides a syringe, wherein the syringe comprises, A housing assembly, wherein a first receiving cavity is provided within the housing assembly along a first direction; An injection assembly, at least partially located within the first receiving cavity, includes an injection tube and a pusher, wherein a first injection cavity is disposed within the injection tube along a first direction, and the pusher moves within the first injection cavity along the first direction to realize the extraction and release of the drug liquid by the injection assembly, and the injection tube is detachably connected to the housing assembly. The device includes a motion component and a control component. The motion component is located within the first receiving cavity and at one end of the pusher along the first direction. The control component is connected to the motion component and drives the motion component to move at a constant speed along the first direction, thereby further driving the pusher to move along the first direction. The injection component draws out the liquid medicine by manually pulling the pusher, and the injection component releases the liquid medicine by automatically pushing the pusher with the motion component.

[0006] In one possible implementation, the injection assembly includes, A first connector is connected to the injection tube and protrudes outward from the injection tube.

[0007] In one possible implementation, the housing assembly includes, The main housing is disposed along the first direction, and the first receiving cavity is disposed within the main housing along the first direction. A third opening is provided at one end of the main housing along the first direction, and the third opening is connected to the first receiving cavity. The end face of the main housing with the third opening is a first limiting surface. The limiting housing has a second receiving cavity disposed inside along the first direction. The second receiving cavity is connected to the first receiving cavity through the third opening. A second limiting surface is disposed inside the second receiving cavity. The limiting housing is detachably connected to the main housing, and the first connecting member can be located between the first limiting surface and the second limiting surface to form a limiting position of the injection assembly along the first direction.

[0008] In one possible implementation, the pusher includes, A push rod and a piston handle are provided. The push rod is disposed in the first injection cavity along the first direction and can move in the first injection cavity along the first direction. The piston handle is connected to one end of the push rod outside the first injection cavity. When the injection assembly is connected to the housing assembly, the piston handle is located in the first receiving cavity.

[0009] In one possible implementation, the injection assembly further includes, The device includes a limiting block and a rubber stopper. The front end of the push rod is machined to form an installation shaft, and a first abutment surface is formed between the installation shaft and the push rod. The limiting block is connected to the end of the push rod, and a second abutment surface is formed between the limiting block and the push rod. The rubber stopper has a first through hole through it along the first direction. The installation shaft passes through the first through hole along the first direction, and the first abutment surface and the second abutment surface form a clamping effect on the rubber stopper. The rubber stopper abuts against the inner wall of the first injection cavity.

[0010] In one embodiment, the limiting block is threadedly connected to the mounting shaft, and the limiting block is made of a rigid material.

[0011] In one possible implementation, the motion component includes, A transmission rod and a movable rod are provided in the first receiving cavity along the first direction. The movable rod is sleeved outside the transmission rod and is threadedly connected to the transmission rod. A driving component is connected to the transmission rod to drive the transmission rod to rotate. Under the rotation of the transmission rod, the movable rod can move closer to the pusher in the first direction within the first receiving cavity, and drive the pusher to move outward.

[0012] In one embodiment, the control component is a touch button disposed on the housing assembly, which generates a control signal by being pressed by a finger, and the control component is electrically connected to the drive component.

[0013] In one embodiment, the control component is a foot pedal button disposed outside the housing assembly, so as to generate a control signal by foot pressing, and the control component is electrically connected to the drive component.

[0014] In one embodiment, the control component is plugged into the drive component via a data connection cable.

[0015] Compared to existing technologies, the syringe of this application includes an injection component and a shell component. The injection component includes an injection tube and a pusher. A first injection cavity is provided inside the injection tube. The pusher moves in the first injection cavity along a first direction to achieve the extraction and release of the drug by the injection component. The injection tube and the shell component are detachably connected. The syringe also includes a motion component and a control component. The motion component is located in a first receiving cavity, and the control component is connected to a transmission component and drives the transmission component to move at a constant speed along the first direction. In practical use, the separately set injection component can first extract the drug by manually pulling the pusher. After the injection component has extracted the drug, it is assembled with the shell component to achieve integration of the injection component and the shell component. At the same time, the control component drives the motion component to move along the first direction and further pushes the pusher to move along the first direction to achieve the release of the drug by the injection component. Finally, after injection, the injection component and the shell component are disassembled. The injection component is discarded as a disposable consumable, while the other parts of the syringe are retained for reuse. Attached Figure Description

[0016] Appendix Figure 1This is a schematic diagram of one possible structure of the syringe in this application; Appendix Figure 2 This is a schematic diagram of one structure of the injection component of this application; Appendix Figure 3 This is a cross-sectional view of the injection component of this application; Appendix Figure 4 This is a schematic diagram of one possible structure of the push rod in this application; Appendix Figure 5 This is another schematic diagram of the syringe structure of this application; Appendix Figure 6 This is a schematic diagram of a structure between the housing assembly and the injection assembly in this application; Appendix Figure 7 This is a schematic diagram of a structure between the housing assembly and the data connection line in this application.

[0017] Explanation of the labels in the diagram: X, first direction; 10. Syringe; 100. Housing assembly; 110. Main housing; 111. First receiving cavity; 112. First limiting surface; 113. Charging port; 114. Connecting seat; 115. First connecting part; 116. Second connecting part; 120. Limiting housing; 121. Second receiving cavity; 122. Second limiting surface; 130. Third connecting member; 200, Injection assembly; 210, Injection tube; 211, First injection cavity; 220, Pusher; 221, Push rod; 222, Piston handle; 230, Limiting block; 231, Second abutment surface; 240, Rubber stopper; 250, Mounting shaft; 251, First abutment surface; 260, First connector; 270, Luer head; 271, First connecting body; 272, Second connecting body; 273, Second injection cavity; 300. Motion component; 310. Transmission rod; 320. Movable rod; 330. Drive component; 340. Push rod; 400. Control component; 410. Touch button; 420. Foot pedal button; 430. Power switch; 440. Flow control; 450. Data cable; 451. Connector; 452. Cable. Detailed Implementation

[0018] To make the objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] Existing technologies have technical problems: when used as disposable consumables, electric injectors consume a lot of power, or when reused after sterilization, they shorten the lifespan of the equipment.

[0020] Therefore, this application provides a syringe, wherein the syringe comprises, A housing assembly, wherein a first receiving cavity is provided within the housing assembly along a first direction; An injection assembly, at least partially located within the first receiving cavity, includes an injection tube and a pusher, wherein a first injection cavity is disposed within the injection tube along a first direction, and the pusher moves within the first injection cavity along the first direction to realize the extraction and release of the drug liquid by the injection assembly, and the injection tube is detachably connected to the housing assembly. The device includes a motion component and a control component. The motion component is located within the first receiving cavity and at one end of the pusher along the first direction. The control component is connected to the motion component and drives the motion component to move at a constant speed along the first direction, thereby further driving the pusher to move along the first direction. The injection component draws out the liquid medicine by manually pulling the pusher, and the injection component releases the liquid medicine by automatically pushing the pusher with the motion component.

[0021] Example 1: Suprachoroidal injection is a minimally invasive, targeted posterior segment drug delivery technique that injects medication into the potential cavity between the sclera and choroid to achieve precise treatment of the choroid and retina while minimizing impact on the anterior segment. Currently, the mainstream clinical method for suprachoroidal injection surgery still relies on medical staff manually pushing the syringe to infuse the medication. However, the pushing force of manual hands is affected by various subjective factors such as the operator's hand stability, force application habits, and fatigue during surgery. Maintaining a constant pushing force throughout the injection cycle is difficult, making it impossible to achieve consistently fast and precise drug delivery. This often results in inconsistent injection speeds, making it unsuitable for the stringent speed control requirements of suprachoroidal injection, and leading to significant uncertainty in clinical safety and efficacy.

[0022] To address the technical shortcomings of manual injection, such as unstable thrust and poor injection accuracy, electric injection devices have been developed. These devices rely on motor drive to achieve uniform drug delivery, precisely controlling the injection dosage and speed. This effectively avoids fluctuations in drug administration parameters caused by manual operation and fully meets the clinical precision requirements for suprachoroidal injection. However, the overall purchase cost of electric injectors on the market is high, and the core electronic control and drive components are expensive. From the perspective of clinical medical consumable cost control, it is not feasible to use the entire electric injector as a disposable consumable. If the electric injector is repeatedly sterilized and reused through high-temperature or chemical immersion, the complex and precise electronic control structure is prone to malfunctions such as circuit aging, reduced drive accuracy, and seal failure during repeated sterilization, significantly shortening the equipment's lifespan.

[0023] Please refer to the attached document. Figure 1 To be continued Figure 7 As shown, the first direction X in this application refers to the length direction of the syringe 10, that is, the direction of the syringe 10 from left to right or the direction of the syringe 10 from right to left. In this application, the piston handle 222 is disposed to the right of the sealing plug, and the sealing plug is disposed to the left of the piston handle 222.

[0024] Appendix Figure 1 This is a schematic diagram of one possible structure of the syringe 10 of this application. Please refer to the attached diagram. Figure 1 As shown, the syringe 10 of this application includes a housing assembly 100 for accommodating other components of the syringe 10 except for the foot pedal button 420.

[0025] Please refer to the attached document. Figure 1 As shown, the syringe 10 of this application includes an injection assembly 200, which is located inside the housing assembly 100. The injection assembly 200 has a first injection cavity 211 inside, and the injection assembly 200 is used to extract and release the drug liquid through the first injection cavity 211.

[0026] Please refer to the attached document. Figure 1 As shown, the syringe 10 of this application includes a motion component 300 and a control component 400, with attachments... Figure 1 The motion component 300 is not shown in the diagram. It is located within the housing assembly 100. The control component 400 is connected to the motion component 300 and drives it to move along a first direction X, thereby at least driving the injection assembly 200 to achieve a uniform release of the drug solution. In this application, the automatic and uniform release of the drug solution by the injection assembly 200 is achieved through the control component 400 and the motion component 300, while the drug solution is manually extracted by the injection assembly 200.

[0027] In one embodiment, the control component 400 is a touch button 410 disposed on the housing component 100. The touch button 410 generates a control signal by touching with a finger. The control component 400 is electrically connected to the drive component 330 to form automated control of the motion component 300. Compared with manual control, the injection speed is easier to control with automated control.

[0028] In one embodiment, the control component 400 is a foot pedal button 420 disposed outside the housing component 100. The foot pedal button 420 generates a control signal by being pressed by foot. The control component 400 is electrically connected to the drive component 330 to form automated control of the motion component 300. Compared with manual control, the injection speed is easier to control with automated control. Compared with the touch button 410, the foot pedal button 420 can reduce the vibration of the injection component 200 during operation, thereby improving the accuracy of the syringe 10 in controlling the injection area during injection.

[0029] Furthermore, the control component 400 of this application also includes an on / off switch 430, which is used to turn the syringe 10 on and off.

[0030] Furthermore, the control component 400 of this application also includes a flow rate adjustment control 440, which is used to adjust the injection speed of the syringe 10. More specifically, the flow rate adjustment control 440 is used to control the rotation speed of the drive member 330 to further adjust the propulsion speed of the motion component 300 in the first direction X, so as to adjust the injection speed of the syringe 10.

[0031] Furthermore, the control component 400 of this application also includes a data connection cable 450, through which the foot pedal button 420 is connected to the driver 330. In this application, in addition to being connected via the data connection cable 450, the foot pedal button 420 and the driver 330 can also be wirelessly connected via Bluetooth.

[0032] Appendix Figure 2 This is a schematic diagram of one structure of the injection component 200 of this application, attached. Figure 3 This is a cross-sectional view of the injection component 200 of this application. Please refer to the attached diagram. Figure 2 and appendix Figure 3As shown, the injection assembly 200 of this application includes an injection tube 210, which is an elongated structure extending along a first direction X. A first injection cavity 211 is arranged inside the injection tube 210 along the first direction X. The first injection cavity 211 penetrates the injection tube 210. A first opening and a second opening are respectively provided at both ends of the first injection cavity 211 along the first direction X. Both the first opening and the second opening are connected to the first injection cavity 211. The first opening and the second opening are provided to allow the push rod 221 to extend out of the first injection cavity 211 and to allow the injection liquid to enter the first injection cavity 211.

[0033] In one embodiment, the cross-section of the injection tube 210 and the first injection cavity 211 is circular.

[0034] In one embodiment, the diameter of the first injection cavity 211 is 0.8 mm to 1 mm.

[0035] Please refer to the attached document. Figure 2 To be continued Figure 3 As shown, the injection assembly 200 of this application includes a pusher 220, which moves along a first direction X within the first injection cavity 211 to achieve the extraction and release of the drug solution by the injection assembly 200. The pusher 220 includes a push rod 221 and a piston handle 222. The push rod 221 is an elongated structure arranged along the first direction X. The push rod 221 is arranged along the first direction X within the first injection cavity 211 and can move along the first direction X within the first injection cavity 211. The push rod 221 has two parts: one part is located within the first injection cavity 211, and the other part is located outside the first injection cavity 211. The end of the push rod 221 located outside the first injection cavity 211 is connected to the piston handle 222. In this application, the push rod 221 can be pushed to move within the first injection cavity 211 by the piston handle 222.

[0036] Please refer to the attached document. Figure 2 To be continued Figure 3 As shown, the injection assembly 200 of this application also includes a Luer head 270, which is disposed at the first opening of the first injection cavity 211. The Luer head 270 is connected to the injection tube 210. The Luer head 270 is provided with a second injection cavity 273 along the first direction X. The first injection cavity 211 is connected to the second injection cavity 273 through the first opening.

[0037] In one embodiment, the Luer head 270 includes a first connecting body 271 and a second connecting body 272. A first receiving cavity 111 is disposed through the first connecting body 271 along a first direction X. The second connecting body 272 is located within the first receiving cavity 111, and a second injection cavity 273 is disposed within the second connecting body 272. This is one configuration of the second injection cavity 273; of course, the Luer head 270 can also be integrally configured in addition to being separate components.

[0038] Please refer to the attached document. Figure 2 To be continued Figure 3 As shown, the injection assembly 200 of this application also includes a positioning element disposed between the Luer head 270 and the injection tube 210 to form an alignment between the first injection cavity 211 and the second injection cavity 273.

[0039] In one embodiment, the positioning element includes a positioning protrusion and a positioning groove. The positioning protrusion is disposed in one of the Luer head 270 and the injection tube 210, and the positioning groove is disposed in the other of the Luer head 270 and the injection tube 210.

[0040] Please refer to the attached document. Figure 2 and appendix Figure 3 As shown, the injection assembly 200 of this application further includes a first connector 260, which is disposed at the second opening of the first injection cavity 211. The first connector 260 is connected to the injection tube 210 and protrudes outward from the injection tube 210. The first connector 260 is provided to connect the injection assembly 200 to other components, thereby realizing the automated pushing of the push rod 221. Furthermore, the injection tube 210 is detachably connected to the housing assembly 100 through the first connector 260.

[0041] Appendix Figure 4 This is a structural schematic diagram of the push rod 221 of this application. Please refer to the attached diagram. Figure 4As shown, the injection assembly 200 of this application includes a limiting block 230 and a rubber stopper 240. The front end of the push rod 221 is formed into a mounting shaft 250 by cutting. A first abutting surface 251 is formed between the mounting shaft 250 and the push rod 221. The limiting block 230 is connected to the end of the mounting shaft 250. The end of the mounting shaft 250 refers to the end of the mounting shaft 250 away from the push rod 221. A second abutting surface 231 is formed between the limiting block 230 and the mounting shaft 250. A first through hole is provided in the rubber stopper 240 along the first direction X. The mounting shaft 250 passes through the first through hole along the first direction X. The first abutting surface 251 and the second abutting surface 231 form a clamping effect on the rubber stopper 240. The rubber stopper 240 abuts against the interior of the first injection cavity 211. Furthermore, during the cutting process, the mounting shaft 250 simultaneously forms an external thread, and the limiting block 230 forms an internal thread. The external thread of the mounting shaft 250 matches the internal thread of the limiting block 230. The aforementioned machining method of forming the mounting shaft 250 on the push rod 221 is simpler than the machining method of machining threads on the rubber plug 240 and the push rod 221. Moreover, the fixing method of the rubber plug 240 formed by the mounting shaft 250, the first abutment surface 251, and the second abutment surface 231 is more stable than the method of fixing the rubber plug 240 with threads. Although both the limiting block 230 in this application and the rubber plug 240 in the prior art have internal threads, the limiting block 230 is made of a hard material, so it is easier to operate to drill threads on the limiting block 230 than on the rubber plug 240. The threaded connection between the limiting block 230 and the mounting shaft 250 in the axial direction can adjust the axial distance between the first abutment surface 251 and the second abutment surface 231.

[0042] The first abutment surface 251 and the second abutment surface 231 limit the axial compression stroke of the rubber stopper 240. Therefore, even under axial force, the rubber stopper 240 will not be over-compressed axially, eliminating the phenomenon of "the thrust compressing the rubber stopper 240 first, but the medicine not coming out." Furthermore, after the thrust is removed, the traditional rubber stopper 240 would rebound, creating negative pressure and drawing back the medicine. However, the first abutment surface 251 and the second abutment surface 231 prevent the rubber stopper 240 from rebounding backward, eliminating the problem of medicine backflow caused by rebound. Finally, the first abutment surface 251, the second abutment surface 231, and the first through hole integrate a radial guiding function, ensuring that the rubber stopper 240 always moves in the center, avoiding unilateral force and eccentric tilting, further reducing local deformation and leakage.

[0043] In one embodiment, the rubber stopper 240 is made of a fluorinated polymer material. Further, the rubber stopper 240 is made of Teflon. Traditional rubber stoppers 240 are highly elastic and easily compressed axially and bulge radially under pressure. The rubber stopper 240 made of a fluorinated polymer material has far superior rigidity than rubber, and is less prone to elastic compression and bulging under pressure. This prevents the problem of "stroke being eaten up by deformation" during the initial injection phase, ensuring that the apparent stroke is highly synchronized with the drug output stroke. Furthermore, the presence of reverse cavity pressure in the suprachoroidal cavity can cause the front end of the rubber stopper 240 to cave in. The high compressive strength of the rubber stopper 240 prevents the front end from being crushed or caved in by reverse pressure, thus avoiding drug retention and negative pressure backflow from the source. Finally, the rubber stopper 240 made of a fluorinated polymer material has an extremely low surface friction coefficient, allowing for smooth sliding and reducing the risk of eccentricity and jamming, thus minimizing unilateral warping deformation.

[0044] Appendix Figure 5 This is another structural schematic diagram of the syringe 10 of this application. Please refer to the attached diagram. Figure 5 As shown, the syringe 10 of this application includes a housing assembly 100, and a first receiving cavity 111 is disposed within the housing assembly 100 along a first direction X. Further, the housing assembly 100 includes a main housing 110, which is disposed along the first direction X, and the first receiving cavity 111 is disposed within the main housing 110 along the first direction X. A third opening is provided at one end of the main housing 110 along the first direction X, and the third opening is connected to the first receiving cavity 111. The end face of the main housing 110 with the third opening is a first limiting surface 112. The housing assembly 100 also includes a limiting housing 120, which has a second receiving cavity 121 along the first direction X. The second receiving cavity 121 communicates with the first receiving cavity 111 through a third opening. A second limiting surface 122 is provided inside the second receiving cavity 121. The limiting housing 120 is detachably connected to the main housing 110, and the first connecting member 260 can be located between the first limiting surface 112 and the second limiting surface 122 to limit the injection assembly 200 along the first direction X. Furthermore, when the injection assembly 200 is disposed inside the housing assembly 100, the automatic release of the liquid medicine inside the injection assembly 200 can be achieved through the motion component 300 and the control component 400. When the injection assembly 200 is disposed outside the housing assembly 100, the liquid medicine can be manually extracted from the injection assembly 200 through the pusher 220. That is, the injection component 200 draws out the liquid medicine by manually pulling the pusher 220, and the injection component 200 releases the liquid medicine by automatically pushing the pusher 220 by the motion component 300.

[0045] In practical use, the separately set injection component 200 can first be manually pulled by the pusher 220 to draw out the liquid. After the injection component 200 has drawn out the liquid, it is assembled with the housing component 100 to achieve integration of the injection component 200 and the housing component 100. At the same time, the control component 400 drives the motion component 300 to move along the first direction X and further pushes the pusher 220 to move along the first direction X to release the liquid. Finally, after the injection is completed, the injection component 200 and the housing component 100 are disassembled. The injection component 200 is discarded as a disposable consumable, and the other parts of the syringe 10 except for the injection component 200 are retained to enable the reuse of the syringe 10.

[0046] Please refer to the attached document. Figure 5 As shown, the syringe 10 of this application includes a motion component 300 and a control component 400. The motion component 300 is located in the first receiving cavity 111 and is located at one end of the pusher 220 along the first direction X. The control component 400 is connected to the motion component 300 and drives the motion component 300 to move along the first direction X, so as to further drive the pusher 220 to move at a constant speed along the first direction X.

[0047] In one embodiment, the motion component 300 includes a transmission rod 310 and a movable rod 320. Both the transmission rod 310 and the movable rod 320 are disposed in the first receiving cavity 111 along the first direction X. The movable rod 320 is sleeved outside the transmission rod 310 and is threadedly connected to the transmission rod 310. The motion assembly 300 also includes a drive member 330, which is connected to the transmission rod 310 to drive the transmission rod 310 to rotate. Under the rotation of the transmission rod 310, the movable rod 320 can move along the first direction X towards the pusher 220 in the first receiving cavity 111 and drive the pusher 220 to move outward. The motion assembly 300 also includes a push rod 340, which is disposed at the end of the movable rod 320 near the pusher 220. The push rod 340 is connected to the movable rod 320. The end face of the push rod 340 near the pusher 220 is flat, and the cross-sectional area of ​​the push rod 340 is larger than that of the movable rod 320 to better achieve contact with the pusher 220.

[0048] Appendix Figure 6 This is a schematic diagram of a structure between the housing assembly 100 and the injection assembly 200 of this application. Please refer to the attached diagram. Figure 6As shown, the main housing 110 of this application is composed of a first connecting portion 115 and a second connecting portion 116. The first connecting portion 115 and the second connecting portion 116 are arranged sequentially along a first direction X. A first receiving cavity 111 is provided in both the first connecting portion 115 and the second connecting portion 116. The first connecting portion 115 and the second connecting portion 116 are connected by a third connecting member 130. The third connecting member 130 includes a limiting protrusion and a limiting groove. The limiting protrusion and the limiting groove are engaged. The limiting protrusion is provided in one of the first connecting portion 115 and the second connecting portion 116, and the limiting groove is provided in the other of the first connecting portion 115 and the second connecting portion 116.

[0049] The limiting housing 120 and the second connecting portion 116 are detachably connected via a fourth connector to achieve a detachable connection between the injection tube 210 and the housing assembly 100. Furthermore, the fourth connector includes internal and external threads, which are adapted to each other. The external thread is located on the outer surface of the second connecting portion 116, and the internal thread is located on the second connecting portion 116. In this application, the second connecting portion 116 can also achieve a detachable connection via a plug-in connection or other means besides a threaded connection. In this application, both the second connecting portion 116 and the limiting housing 120 are reusable.

[0050] Appendix Figure 7 This is a schematic diagram of a structure between the housing assembly 100 and the data connection line 450 of this application. Please refer to the attached diagram. Figure 7 As shown, a charging port 113 is provided on the main housing 110 of this application along the first direction X. The charging port 113 has a certain depth in the first direction X. A connector 114 is provided inside the main housing 110. The connector 114 is used to connect with the data connection cable 450 to realize data transmission or charging. The data connection cable 450 includes a connector 451 and a connection cable 452. The connector 451 and the connection cable 452 are connected. The connector 451 is used to be inserted into the charging port 113 and connected to the connector 114. When the charging port 113 has a certain depth in the first direction X, the connector 451 can be circumferentially limited to reduce the possibility of the data connector coming off the main housing 110 in case of accident.

[0051] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0053] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A syringe, characterized in that, The syringe includes, A housing assembly, wherein a first receiving cavity is provided within the housing assembly along a first direction; An injection assembly, at least partially located within the first receiving cavity, includes an injection tube and a pusher, wherein a first injection cavity is disposed within the injection tube along a first direction, and the pusher moves within the first injection cavity along the first direction to realize the extraction and release of the drug liquid by the injection assembly, and the injection tube is detachably connected to the housing assembly. The device includes a motion component and a control component. The motion component is located within the first receiving cavity and at one end of the pusher along the first direction. The control component is connected to the motion component and drives the motion component to move at a constant speed along the first direction, thereby further driving the pusher to move along the first direction. The injection component draws out the liquid medicine by manually pulling the pusher, and the injection component releases the liquid medicine by automatically pushing the pusher with the motion component.

2. The syringe according to claim 1, characterized in that, The injection component includes, A first connector is connected to the injection tube and protrudes outward from the injection tube.

3. The syringe according to claim 2, characterized in that, The housing assembly includes, The main housing is disposed along the first direction, and the first receiving cavity is disposed within the main housing along the first direction. A third opening is provided at one end of the main housing along the first direction, and the third opening is connected to the first receiving cavity. The end face of the main housing with the third opening is a first limiting surface. The limiting housing has a second receiving cavity disposed inside along the first direction. The second receiving cavity is connected to the first receiving cavity through the third opening. A second limiting surface is disposed inside the second receiving cavity. The limiting housing is detachably connected to the main housing, and the first connecting member can be located between the first limiting surface and the second limiting surface to form a limiting position of the injection assembly along the first direction.

4. The syringe according to claim 1, characterized in that, The push device includes, A push rod and a piston handle are provided. The push rod is disposed in the first injection cavity along the first direction and can move in the first injection cavity along the first direction. The piston handle is connected to one end of the push rod outside the first injection cavity. When the injection assembly is connected to the housing assembly, the piston handle is located in the first receiving cavity.

5. The syringe according to claim 4, characterized in that, The injection assembly also includes, The device includes a limiting block and a rubber stopper. The front end of the push rod is machined to form an installation shaft, and a first abutment surface is formed between the installation shaft and the push rod. The limiting block is connected to the end of the push rod, and a second abutment surface is formed between the limiting block and the push rod. The rubber stopper has a first through hole through it along the first direction. The installation shaft passes through the first through hole along the first direction, and the first abutment surface and the second abutment surface form a clamping effect on the rubber stopper. The rubber stopper abuts against the inner wall of the first injection cavity.

6. The syringe according to claim 5, characterized in that, The limiting block is threadedly connected to the mounting shaft, and the limiting block is made of a rigid material.

7. The syringe according to claim 1, characterized in that, The motion component includes, A transmission rod and a movable rod are provided in the first receiving cavity along the first direction. The movable rod is sleeved outside the transmission rod and is threadedly connected to the transmission rod. A driving component is connected to the transmission rod to drive the transmission rod to rotate. Under the rotation of the transmission rod, the movable rod can move closer to the pusher in the first direction within the first receiving cavity, and drive the pusher to move outward.

8. The syringe according to claim 7, characterized in that, The control component is a touch button located on the housing assembly, which generates a control signal by being pressed with a finger. The control component is electrically connected to the drive component.

9. The syringe according to claim 7, characterized in that, The control component is a foot pedal button located outside the housing assembly, which generates a control signal by pressing the foot pedal. The control component is electrically connected to the drive component.

10. The syringe according to claim 9, characterized in that, The control component is connected to the drive component via a data connection cable.

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