Delivery apparatus and delivery system

Abstract

The present invention belongs to the technical field of medical devices, and particularly relates to a delivery apparatus and a delivery system. The delivery apparatus of the present invention comprises a housing, a mounting cavity being formed inside the housing and one end of the mounting cavity in a first axis being provided with a fixing portion; a pushing member, at least part of the pushing member being arranged in the mounting cavity, and the pushing member being configured to be movable towards the fixing portion in the first axis; and an elastic support member, arranged in the mounting cavity and on one side of the pushing member in a second axis, the second axis perpendicularly intersecting with the first axis. A plane in the first axis and perpendicular to the second axis is defined as a first surface, and the elastic support member provides an elastic force non-parallel to the first surface for the pushing member. The delivery apparatus of the present application can inject the medical adhesive more effortlessly.

Description

Delivery device and delivery system TECHNICAL FIELD

[0001] The present application belongs to the technical field of medical devices, and particularly relates to a delivery device and a delivery system. BACKGROUND

[0002] Varicosis of lower extremity mainly refers to a syndrome caused by abnormal structure or function of veins, poor venous blood return, and high venous pressure, and varicosis of great saphenous vein is most common. Its clinical manifestations include heaviness, fatigue pain, edema, tortuous veins, skin state change, and venous ulcer, and it can be complicated with rupture and hemorrhage or thrombotic superficial phlebitis, and even cause fatal pulmonary embolism. Therefore, varicosis of lower extremity not only affects the quality of life of patients, but also threatens life in severe cases. Data shows that varicosis of lower extremity is a problem for 120 million patients in China, and it shows a clear upward and younger trend.

[0003] In recent years, with the progress of technology and the popularization of clinical application, the treatment of varicosis has gradually shifted from traditional traumatic open surgery to endovascular closure surgery. Compared with energy ablation technology, the room temperature closure technology represented by vein glue can ensure the closure rate while avoiding thermal damage, and does not require injection of swelling anesthetic. In addition, it also has the advantages of short learning curve, short operation time, small patient damage, and fast recovery to normal life. Endovascular closure of vein glue is to completely close the functionally insufficient vein lumen by injecting medical glue into the vein lumen, so as to achieve the purpose of eliminating reflux. By closing the superficial vein with vein closure glue, permanent treatment of varicosis can be achieved. SUMMARY

[0004] The purpose of the present application is to at least solve the problem of how to inject medical glue into the vein labor-savingly, and this purpose is achieved in the following way:

[0005] The first aspect of the present application proposes a delivery device, which comprises:

[0006] a housing, an installation cavity is formed in the interior of the housing, and the installation cavity is provided with a fixed part at one end of a first axis;

[0007] a pusher, at least part of the pusher is arranged in the installation cavity, and the pusher is configured to be movable in the direction of the first axis towards the fixed part;

[0008] a resilient support, the resilient support is arranged in the installation cavity and on one side of the pusher along a second axis, the second axis intersects the first axis perpendicularly, a plane along the first axis and perpendicular to the second axis is defined as a first plane, and the resilient support provides the pusher with an elastic force non-parallel to the first plane.

[0009] In some embodiments of the present application, the elastic support comprises a body portion, a first support portion extending from the body portion towards a side away from the pushing member and abutting against an inner wall of the mounting cavity, and a second support portion extending from the body portion towards a side close to the pushing member and abutting against the pushing member; at least one of the first support portions extends towards a direction non-perpendicular to the first face, and at least one of the second support portions extends towards a direction non-perpendicular to the first face.

[0010] In some embodiments of the present application, the second support portions are multiple, and the multiple second support portions comprise a second proximal end support portion arranged at a proximal end of the body portion along the first axis and extending towards a proximal end of the delivery device, and a second distal end support portion arranged at a distal end of the body portion along the first axis and extending towards a distal end of the delivery device; the second proximal end support portion is arranged at a first non-right angle with the first axis, and / or the second distal end support portion is arranged at a second non-right angle with the first axis.

[0011] In some embodiments of the present application, the first non-right angle ranges from 30° to 60°, and / or the second non-right angle ranges from 30° to 60°.

[0012] In some embodiments of the present application, the delivery device further comprises a trigger assembly, at least part of the trigger assembly is arranged in the mounting cavity and on the other side of the pushing member along the second axis, the trigger assembly is configured to drive the pushing member to move towards the fixed portion along the first axis, and the abutting position of the trigger assembly and the pushing member is between the second proximal end support portion and the second distal end support portion.

[0013] In some embodiments of the present application, the first support portions are multiple, and the multiple first support portions comprise a first proximal end support portion arranged at a proximal end of the body portion along the first axis and extending towards a proximal end of the delivery device, and a first distal end support portion arranged at a distal end of the body portion along the first axis and extending towards a distal end of the delivery device; the first proximal end support portion is arranged at a third non-right angle with the first axis, and / or the first distal end support portion is arranged at a fourth non-right angle with the first axis.

[0014] In some embodiments of the present application, the third non-right angle ranges from 30° to 60°, and / or the fourth non-right angle ranges from 30° to 60°.

[0015] In some embodiments of the present application, the first supporting part is provided with a first end portion abutting against the inner wall of the mounting cavity, the dimension of the first end portion along the third axis is greater than the dimension of the first end portion along the first axis, and the plane in which the first axis and the second axis lie intersects the third axis.

[0016] In some embodiments of the present application, the second supporting part is provided with a second end portion abutting against the pushing member, the dimension of the second end portion along the third axis is greater than the dimension of the second end portion along the first axis, and the plane in which the first axis and the second axis lie intersects the third axis.

[0017] In some embodiments of the present application, the supporting strength of the first supporting part is less than the supporting strength of the second supporting part.

[0018] In some embodiments of the present application, the elastic supporting member is in interference fit with the inner wall of the mounting cavity and the pushing member, and the interference amount is 0.3mm to 0.8mm.

[0019] In some embodiments of the present application, the conveying device further comprises a trigger assembly, the trigger assembly comprises a trigger and a connecting member, the trigger is rotatably connected with the shell, the connecting member is rotatably connected with the portion of the trigger arranged in the mounting cavity, the pushing member is provided with a plurality of first tooth-shaped portions on the surface thereof away from the elastic supporting member along the second axis, the plurality of first tooth-shaped portions are arranged in sequence along the first axis, the connecting member is provided with at least one second tooth-shaped portion on the surface thereof facing the pushing member along the second axis, and the second tooth-shaped portion is in meshing transmission connection with the first tooth-shaped portion.

[0020] In some embodiments of the present application, a plurality of first guide ribs are arranged in the mounting cavity, the plurality of first guide ribs are arranged in a circumferential direction along the first axis, and the end faces of the plurality of first guide ribs enclose a guide cavity, the guide cavity extends along the first axis, and the pushing member is slidably arranged in the guide cavity.

[0021] In some embodiments of the present application, a plurality of first guide ribs are arranged in the mounting cavity, a guide groove is formed between two adjacent first guide ribs, and part of the pushing member is embedded in the guide groove and can move along the first axis.

[0022] The second aspect of the present application further proposes a conveying system, wherein the conveying system comprises the conveying device according to any one of the above-mentioned embodiments, and the conveying system further comprises:

[0023] The syringe comprises a barrel and a push rod, the barrel is connected with the fixed part, the push rod is arranged in the installation cavity, and part of the push rod is inserted into the barrel, and the push member is arranged on the side of the push rod away from the barrel along the first shaft;

[0024] The glue feeding guide pipe is connected with the liquid outlet end of the barrel;

[0025] The conveying sheath pipe is sleeved outside the glue feeding guide pipe, and the end of the glue feeding guide pipe away from the syringe extends to the outside of the conveying sheath pipe.

[0026] According to the conveying device and the conveying system, the elastic support member is abutted with the push plate, compared with the support member without elastic deformation, the resistance of the elastic support member to the push member is reduced, the process of pushing the push member is more labor-saving, and the energy consumption of the doctor in the mechanical labor process is reduced.

[0027] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0028] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the preferred embodiments and are not considered to be limiting on the present application. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. Among them:

[0029] Fig. 1 is a structural schematic diagram of a conveying system according to an embodiment of the present application;

[0030] Fig. 2 is a structural schematic diagram of the conveying system in Fig. 1 after removing part of the shell;

[0031] Fig. 3 is a structural schematic diagram of the conveying device in Fig. 1 after removing part of the shell;

[0032] Fig. 4 is an exploded structural schematic diagram of the conveying device in Fig. 1;

[0033] Fig. 5 is a partial cross-sectional structural schematic diagram of the conveying device in Fig. 1;

[0034] Fig. 6 is an enlarged structural schematic diagram of part A in Fig. 2;

[0035] Fig. 7 is an enlarged structural schematic diagram of part B in Fig. 5;

[0036] Fig. 8 is a structural schematic diagram of the elastic support member in Fig. 4;

[0037] Fig. 8a is a structural schematic view of another embodiment of the elastic support;

[0038] Fig. 9 is an enlarged structural schematic view of part C in Fig. 7;

[0039] Fig. 10 is a structural schematic view of the trigger in Fig. 4;

[0040] Fig. 11 is a structural schematic view of the connecting member in Fig. 4;

[0041] Fig. 12 is a structural schematic view of the pressing member in Fig. 4;

[0042] Fig. 13 is a structural schematic view of the pushing member in Fig. 4;

[0043] Fig. 14 is a structural schematic view of the first housing part in Fig. 4;

[0044] Fig. 15 is a structural schematic view of the D-D section in Fig. 1;

[0045] Fig. 16 is a structural schematic view of the assembly of the glue inlet guide pipe and the delivery sheath pipe in Fig. 1.

[0046] The various reference signs in the drawings represent the following: 1000, conveying system; 100, conveying device; 10, housing; 11, first housing part; 12, second housing part; 13, fixing part; 14, first positioning rib; 15, first guide rib; 151, guide groove; 16, partition plate; 17, second guide rib; 18, mounting cavity; 181, first cavity; 182, second cavity; 19, guide cavity; 20, pushing piece; 21, plate body part; 211, embedding part; 22, first limiting rib; 23, head part; 24, first tooth-shaped part; 241, first side surface; 30, elastic support piece; 31, body part; 32, first support part; 321, first end part; 322, first proximal end support part; 323, first distal end support part; 33, second support part; 331, second end part; 332, second proximal end support part; 333, second distal end support part; 34, reinforcing part; 35, support column; 36, protruding part; 37, avoiding opening; 38, reinforcing connecting piece; 40, trigger assembly; 41, trigger; 411, first arc-shaped surface; 412, second arc-shaped surface; 413, first plug-in hole; 414, second plug-in hole; 42, connecting piece; 421, support frame; 422, third plug-in hole; 423, extending end; 424, second tooth-shaped part; 4241, second side surface; 43, first pin shaft; 44, first torsional spring; 45, second pin shaft; 46, second torsional spring; 50, pressing piece; 51, pressing part; 52, abutting part; 53, sleeve part; 200, syringe; 201, tube body; 202, push rod; 300, glue feeding guide pipe; 301, first joint; 400, conveying sheath pipe; 401, second joint; X, first axis; Y, second axis; Z, third axis. DETAILED DESCRIPTION

[0047] Exemplary embodiments of the present application will be described in greater detail below with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it is understood that the present application can be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

[0048] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described unless specifically identified as an order dependent step. It is also to be understood that additional or alternative steps can be employed.

[0049] Although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first", "second", and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0050] Spatially relative terms, such as "inner", "outer", "inward", "outward", "lower", "bottom", "top", "upper", and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Such spatially relative terms can encompass different orientations of the device in use or operation, depending on the particular context in which it is used. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0051] In order to more clearly describe the structure of the present application, the terms "proximal" and "distal" are defined as terms commonly used in the field of interventional medicine. Specifically, "distal" refers to the end that is farthest from the operator during a surgical procedure, "proximal" refers to the end that is closest to the operator during a surgical procedure, "axial" refers to the lengthwise direction, and "radial" refers to the direction perpendicular to the "axial" direction.

[0052] In recent years, with the progress of technology and the popularity of clinical application, the treatment of varicose veins has gradually shifted from traditional invasive open surgery to endovascular closure surgery. Compared with energy ablation technology, the room temperature closure technology represented by venous glue can ensure the closure rate while avoiding thermal damage, and does not require the injection of swelling anesthetic. In addition, it also has the advantages of short learning curve, short operation time, small patient damage and fast recovery to normal life. Venous glue endovascular closure is to completely close the functionally insufficient vein lumen by injecting medical glue into the vein lumen, so as to eliminate reflux. By sealing the superficial vein with venous closure glue, permanent treatment of varicose veins can be achieved.

[0053] To solve the problem of how to inject medical glue into the vein, the present application provides a delivery device and a delivery system comprising the delivery device, which can inject medical glue into the vein and reduce or avoid the movement of the push rod of the syringe in the direction away from the tube body of the syringe under the action of the injection liquid, thereby improving the accuracy of position judgment of the pusher and the push rod during injection, improving the accuracy of glue injection amount judgment and ensuring the smoothness of the injection process, and reducing the occurrence of medical accidents. At the same time, compared with the non-elastic support, the elastic support can reduce the resistance of the pusher to the pusher, so that the process of pushing the pusher by pressing the trigger assembly is more labor-saving, thereby reducing the energy consumption of the doctor during mechanical labor.

[0054] In combination with FIGS. 1-7, the first aspect of the present application provides a delivery device 100, which comprises a housing 10, a pusher 20, an elastic support 30 and a trigger assembly 40. The inside of the housing 10 forms a mounting cavity 18, the mounting cavity 18 is provided with a fixed part 13 at one end along a first axis X, at least part of the pusher 20 is arranged in the mounting cavity 18, the pusher 20 is configured to move in the direction of the fixed part 13 along the first axis X, the elastic support 30 is arranged in the mounting cavity 18 and on one side of the pusher 20 along a second axis Y, the second axis Y intersects the first axis X, in this embodiment, the second axis Y intersects the first axis X perpendicularly, part of the elastic support 30 abuts against the pusher 20, a plane along the first axis and perpendicular to the second axis is defined as a first plane, and the elastic support 30 provides a non-parallel elastic force to the pusher 20 along the first plane.

[0055] At least part of the trigger assembly 40 is arranged in the mounting cavity 18 and on the other side of the pusher 20 along the second axis Y, the trigger assembly 40 is configured to drive the pusher 20 to move in the direction of the fixed part 13, and in the initial state of the trigger assembly 40 driving the pusher 20 to move, the elastic support 30 is extruded and deformed.

[0056] The syringe 200 can be used for injection of various injection liquids, and for the convenience of description, the present application only takes the injection of medical glue by the syringe 200 as an example for description.

[0057] Specifically, the housing 10 forms the overall appearance structure of the delivery device 100, and inside the housing 10 is provided with a mounting cavity 18 for mounting various components. In order to facilitate the mounting of various components into the mounting cavity 18, the housing 10 can be optionally provided with a first housing part 11 and a second housing part 12 which are detachably connected, and the first housing part 11 and the second housing part 12 can be symmetrically structured and can be connected by means of clamping, gluing or bolting.

[0058] The mounting cavity 18 is provided with a fixing part 13 at one end along the first axis X, and the fixing part 13 can be used to mount a barrel 201 of a syringe 200. The syringe 200 generally comprises the barrel 201 and a push rod 202 which is inserted into the barrel 201. The barrel 201 is internally provided with a cavity for accommodating medical glue, and the push rod 202 is inserted into the cavity in a manner that it can move along the axial direction of the barrel 201. The barrel 201 can be connected to the fixing part 13, and the push rod 202 is arranged in the mounting cavity 18 in a manner that it can move along the first axis X. The axial direction of the barrel 201 is consistent with the first axis X, and when the push rod 202 moves along the first axis X and reduces the size of the push rod 202 outside the barrel 201, the push rod 202 can push the medical glue in the barrel 201 to flow out of the barrel 201 from the end away from the push rod 202, so as to enter a glue inlet conduit in communication with the syringe 200, thereby achieving injection of the medical glue.

[0059] The outer circumferential surface of the end of the barrel 201 close to the push rod 202 is provided with a fixing protrusion, and the two fixing protrusions of the barrel 201 form an elliptical structure. The fixing part 13 can be a groove formed by an elliptical hole and a circular hole at a spacing position of the elliptical hole. The first housing part 11 and the second housing part 12 are respectively provided with part of the groove, and when the first housing part 11 and the second housing part 12 are assembled, a complete annular groove is formed. The fixing protrusion on the barrel 201 matches the elliptical hole, so that the fixing protrusion on the barrel 201 can be embedded in the groove after rotating ninety degrees after being placed in the elliptical hole, and the fixing protrusion is fixed in the annular groove, thereby connecting the barrel 201 to the housing 10 and placing the push rod 202 in the mounting cavity 18, and achieving quick mounting and dismounting of the syringe 200.

[0060] At least part of the push member 20 is arranged in the mounting cavity 18, and the part of the push member 20 extends out of the proximal end (the end close to the user during use) of the housing, facilitating repeated use. When the push member 20 moves along the first axis X towards the fixing part 13, the push member 20 abuts against the push rod 202 and can push the push rod 202 to move in the barrel 201, thereby achieving injection of the medical glue in the syringe 200.

[0061] The elastic support 30 is arranged in the mounting cavity 18 and on one side of the pusher 20 along the second axis Y intersecting the first axis X. In the embodiment, the second axis Y intersects the first axis X perpendicularly. Part of the elastic support 30 abuts against the pusher 20 and is configured to provide a friction force along the first axis X to the pusher 20, which is configured to counteract the reverse thrust of the push rod 202 under the action of the pressure difference inside and outside the tube 201 when the push rod 202 abuts against the pusher 20. The second axis Y can be perpendicular to the first axis X. The elastic support 30 can be fixed in the mounting cavity 18 and abut against the pusher 20 and be deformed or have a tendency to be deformed along the second axis Y during abutment, thereby being able to provide a friction force perpendicular to the second axis Y, i.e., a friction force along the first axis X, to the pusher 20, thereby preventing the push rod 202 from retreating. On the one hand, the push rod 202 can generate a reverse thrust towards the pusher 20 under the action of the medical glue in the tube 201 during injection. If the push rod 202 is not subjected to other external forces except the action of the medical glue due to the pressure difference at this time, the push rod 202 and the pusher 20 move away from the tube 201, which can cause the push rod to be pushed back by a certain distance without completely injecting the unit amount of glue, thereby affecting the accuracy of the doctor's judgment of the position of the push rod 202 and the pusher 20 and the judgment accuracy of the injection amount during re-injection, and further reducing the accuracy of injection amount control and the safety of the operation. The friction force provided by the elastic support is configured to counteract the reverse thrust of the push rod 202 under the action of the injection liquid in the tube 201 when the pusher 20 abuts against the push rod 202, i.e., the friction force is greater than the reverse thrust that the medical glue can provide to the push rod 202, thereby preventing the pusher 20 and the push rod 202 from moving away from the barrel 201 of the syringe 200 during injection, thereby ensuring smooth injection and sufficient injection amount, and further achieving the closure of the vein.

[0062] On the other hand, when injecting medical glue, the medical glue is relatively viscous, so the push rod 202 needs to be pressed hard, that is, the trigger 41 of the delivery device needs to be pressed hard when the delivery device is used. At the same time, when injecting medical glue, 3 mL of glue needs to be injected 30 times, 0.1 mL each time, and each time the trigger 41 is pressed to inject glue, the trigger 41 needs to be held for a few seconds (if not held and immediately released, because the glue is viscous and the flow speed is slow, 0.1 mL of glue cannot be completely injected out of the syringe, the push rod of the syringe does not advance 0.1 mL of glue stroke forward, and after the connecting piece pushes the push piece forward, the push plate may not have advanced far enough to enter the next tooth, causing the connecting piece to slide back into the original tooth after the trigger is released), so that 0.1 mL of viscous glue can be slowly injected out of the syringe 200. For 30 times of repeated hard injection, the doctor will spend too much energy and physical strength in mechanical labor, and for intravenous closure intervention surgery, labor-saving design during glue injection is necessary. The plane along the first axis and perpendicular to the second axis is defined as the first plane, the elastic support 30 provides an elastic force to the push piece 20 which is not parallel to the first plane, and the elastic support 30 provides an elastic deformation space on the second axis, which can play a labor-saving role when the trigger assembly 40 is pressed. In one embodiment, as shown in FIGS. 2-3, the push piece 20 is provided as a push plate structure including a toothed bottom surface, the first axis X is the extension direction of the push plate surface length, the second axis Y is the direction perpendicular to the push plate surface, and the first plane is the plane parallel to the push plate surface.

[0063] The trigger assembly 40 is arranged in the mounting cavity 18 and on the other side of the pusher 20 along the second axis Y. The trigger assembly 40 can abut against the pusher 20 and is used to drive the pusher 20 to move towards the fixed part 13, i.e. to move towards the push rod 202 along the direction indicated by the arrow S in FIG. 7, so as to press the push rod 202 and inject medical glue. In the initial state of driving the pusher 20 to move by the trigger assembly 40, the trigger assembly 40 is in the state of being embedded and abutting against the pusher 20, or the trigger assembly 40 is in the state of being separated from the pusher 20 from the last separation state to the abutting state, and the elastic support 30 is deformed under compression. Since the elastic support 30 provides elastic force to the pusher 20 non-parallel to the first surface, the elastic support 30 provides elastic deformation space on the second axis, and the elastic support can be deformed a little towards the direction away from the pusher 20, so as to reduce the compression support of the elastic support 30 to the pusher 20 in the whole process of abutting the trigger assembly 40 against the pusher 20, and further reduce the resistance of the elastic support 30 to the pusher 20 in the process of contacting the trigger assembly 40 with the pusher 20 and pushing the pusher 20 to move forward (since the trigger assembly 40 abuts against the pusher 20 at this time, the pusher 20 will not retreat under the reverse thrust of the push rod 202 at this time, i.e. in the process of contacting the trigger assembly 40 with the pusher 20, the push rod is not prevented from retreating by friction), so as to make the pushing more labor-saving; when the trigger assembly 40 (the connecting piece 42) is separated from the pusher 20, the trigger assembly 40 is no longer in contact with the pusher 20 at this time, and the trigger assembly 40 has no force to the pusher 20, and has no component force on the second axis at this time, the elastic support 30 is interference-fitted to the pusher 20 at this time, and provides static friction force and support force to the pusher 20, so that the static friction force of the elastic support 30 to the pusher 20 prevents the push rod from retreating.

[0064] According to the delivery device 100 of the present application, the fixed part 13 is arranged at one end of the mounting cavity 18 along the first axis X, the tube body of the syringe 200 can be connected to the shell 10 through the fixed part 13, and the push rod 202 of the syringe 200 is arranged in the mounting cavity 18 in a movable manner along the first axis X, the pusher 20 is inserted into the mounting cavity 18 and can move towards the push rod 202 along the first axis X, so as to push the push rod 202 to move along the first axis X, so as to realize the injection of the syringe 200. When the medical glue is stored in the syringe 200, the push rod 202 can be pushed by the pusher 20 to realize the injection of the medical glue into the vein, which can be used for vein closure.

[0065] Meanwhile, the elastic support 30 is arranged in the mounting cavity 18 of the shell 10 and abuts against the pushing member 20 to provide a friction force to the pushing member 20. When no external force is applied to the pushing member 20 to push the push rod 202 during the injection process, the friction force can counteract the reverse thrust of the push rod 202, and the pushing member 20 and the push rod 202 can be prevented from moving away from the barrel 201 of the syringe 200 under the action of the medical adhesive, thereby improving the accuracy of the position determination of the pushing member 20 and the push rod 202 during the injection process, improving the accuracy of the injection amount determination, ensuring the smoothness of the injection process, and reducing the occurrence of medical accidents. Meanwhile, when the pushing member 20 needs to be pushed towards the push rod 202, the elastic support 30 is deformed under compression, and compared with a support without elastic deformation, the elastic support 30 can reduce the resistance of the pushing member 20, so that the process of pushing the pushing member 20 by pressing the trigger assembly is more labor-saving, thereby reducing the energy consumption of the doctor during the mechanical labor process.

[0066] In combination with FIGS. 2 to 8, in some embodiments of the present application, the elastic support 30 includes a body portion 31, a first support portion 32 and a second support portion 33. The first support portion 32 extends from the body portion 31 towards a side away from the pushing member 20 and abuts against the inner wall of the mounting cavity 18. The second support portion 33 extends from the body portion 31 towards a side close to the pushing member 20 and abuts against the pushing member 20. At least one first support portion 32 extends towards a direction non-perpendicular to the first face, and at least one second support portion 33 extends towards a direction non-perpendicular to the first face, so that the elastic support 30 has elasticity in the second axis. In one embodiment, the pushing member 20 is provided as a pushing plate structure with a tooth-shaped bottom face, the first axis X is the extension direction of the length of the pushing plate face, and the body portion 31 is arranged in parallel with the pushing member 20, i.e., the plate face on which the body portion 31 extends is parallel to the pushing plate face, as shown in FIG. 5 in combination with FIGS. 7-8. In other embodiments, the body portion can also be arranged obliquely relative to the pushing member, as long as the support portions at the proximal end and the distal end are not matched in height, so that the elastic support is assembled in the mounting cavity and has an interference fit with the pushing member, which is not limited herein.

[0067] In some embodiments of the present application, the elastic support 30 includes a body portion 31 and first and second support portions 32 and 33 connected to the body portion 31. The first and second support portions 32 and 33 are respectively arranged on opposite sides of the body portion 31 along the second axis Y. The first support portion 32 abuts against the inner wall of the mounting cavity 18, and the second support portion 33 abuts against the pushing member 20, so that the elastic support 30 is clamped between the inner wall of the mounting cavity 18 and the pushing member 20 and deformed or has a tendency to be deformed, thereby providing a friction force along the first axis X and an elastic force along the second axis Y to the pushing member 20 through the elastic support 30.

[0068] Meanwhile, since the first support portion 32 and the second support portion 33 are respectively arranged on opposite sides of the body portion 31 along the second axis Y, the elastic support member 30 can provide elastic force along the second axis Y, so as to facilitate deformation of the elastic support member 30 along the second axis Y and provide friction force along the first axis X.

[0069] In combination with FIGS. 2-8, in some embodiments of the present application, the number of the second support portions 33 is multiple, and the multiple second support portions 33 include a second proximal end support portion 332 and a second distal end support portion 333. The second proximal end support portion 332 is arranged at the proximal end of the body portion 31 along the first axis X, extends towards the proximal end of the delivery device 100, and extends obliquely towards the proximal end. The second distal end support portion 333 is arranged at the distal end of the body portion 31 along the first axis X, extends towards the distal end of the delivery device 100, and extends obliquely towards the distal end. The extension direction of the second proximal end support portion 332 is arranged at a first included angle that is not a right angle with the first axis, and / or the extension direction of the second distal end support portion 333 is arranged at a second included angle that is not a right angle with the first axis X, so as to provide elastic deformation of the elastic support member along the second axis. In other embodiments, the extension direction of the second proximal end support portion 332 is arranged at a first included angle that is not a right angle with the first surface, and / or the extension direction of the second distal end support portion 333 is arranged at a second included angle that is not a right angle with the first surface, so as to provide elastic deformation of the second support portion along the second axis, thereby providing elastic deformation of the elastic support member along the second axis. In the present embodiment, the body portion is a plate structure, and the plate surface of the body portion is arranged parallel to the first surface. The extension direction of the second proximal end support portion 332 is arranged at a first included angle that is not a right angle with the plate surface of the body portion, and / or the extension direction of the second distal end support portion 333 is arranged at a second included angle that is not a right angle with the plate surface of the body portion.

[0070] In some embodiments of the present application, the number of the second support portions 33 can be four, and the four second support portions 33 are respectively arranged on the side of the body portion 31 along the second axis Y towards the pushing member 20, and the four second support portions 33 are symmetrically arranged on both ends of the body portion 31 along the first axis X. Among the four second support portions 33, two second proximal support portions 332 and two second distal support portions 333 are included, as shown in FIG. 8 in combination with FIG. 3, the two second proximal support portions 332 are respectively arranged on the proximal end of the body portion 31 along the first axis X, and the two second proximal support portions 332 are arranged at intervals along the third axis Z and respectively extend towards the proximal end of the conveying device 100. The two second distal support portions 333 are respectively arranged on the distal end of the body portion 31 along the first axis X, and the two second distal support portions 333 are arranged at intervals along the third axis Z and respectively extend towards the distal end of the conveying device 100, and the extending direction of the second proximal support portion 332 is arranged at a first included angle with the first axis X, and the extending direction of the second distal support portion 333 is arranged at a second included angle with the first axis X, so that the second proximal support portion 332 and the second distal support portion 333 are in abutment with the pushing member 20 together, thereby improving the installation stability of the elastic support member 30. Among them, the plane where the first axis X and the second axis Y are located intersects the third axis Z. Optionally, the first axis X, the second axis Y and the third axis Z are perpendicular to each other.

[0071] In some other embodiments of the present application, the number of the second support portions 33 can be two or more, and the two or more second support portions 33 are symmetrically arranged on both ends of the body portion 31 along the first axis X, and the extending direction of any one of the second support portions 33 is arranged at an included angle with the first axis X, and the extending direction of at least one of the second support portions 33 is arranged at a non-perpendicular included angle with the first plane.

[0072] In combination with FIGS. 2 to 8, in some embodiments of the present application, the range of the first included angle is 30° to 60°, and / or the range of the second included angle is 30° to 60°. By setting the range of the first included angle to be 30° to 60°, and the range of the second included angle to be 30° to 60°, both the requirement of the friction force between the second support portion 33 and the pushing member 20 and the elastic deformation of the elastic support member 30 along the second axis Y can be met, so as to reduce the pushing force. Optionally, the first included angle can be 45°, and the second included angle can also be 45°.

[0073] In combination with FIGS. 2 to 8, in some embodiments of the present application, along the first axis X, the abutment position of the trigger assembly 40 and the pushing member 20 is located between the second proximal support portion 332 and the second distal support portion 333, as shown in FIG. 3 in combination with FIG. 5.

[0074] In some embodiments of the present application, the trigger assembly 40 comprises a trigger 41 and a connecting member 42, the trigger 41 is arranged on the other side of the pushing member 20 along the second axis Y, part of the trigger 41 is arranged in the mounting cavity 18, and the other part of the trigger 41 extends to the outside of the housing 10, the part of the trigger 41 arranged in the mounting cavity 18 is connected with the connecting member 42. The trigger 41 is used to drive the connecting member 42 to rotate, and the connecting member 42 can abut against the pushing member 20 during the rotation, thereby pushing the pushing member 20 to move towards the fixed part 13. Wherein, when the connecting member 42 abuts against the pushing member 20, the abutting position of the two along the first axis X is arranged between the second proximal support part 332 and the second distal support part 333, that is, the abutting position of the connecting member 42 and the pushing member 20 is arranged opposite to the elastic support member 30 along the second axis Y. According to the principle of lever, when the connecting member 42 provides a pushing force towards the pushing member 20 along the second axis Y, the moment is the smallest, and the force transmitted to the pushing member 20 is larger, thereby the elastic support member 30 can produce a larger deformation along the second axis Y. Conversely, when the deformation of the elastic support member 30 is certain, the connecting member 42 can provide a smaller pushing force towards the pushing member 20 along the second axis Y, and thus it is more labor-saving when driving the pushing member 20 to move towards the fixed part 13 along the first axis X.

[0075] In combination with FIGS. 2 to 8, in some embodiments of the present application, the number of the first support parts 32 is multiple, and the multiple first support parts 32 comprise a first proximal support part 322 and a first distal support part 323, the first proximal support part 322 is arranged at the proximal end of the body part 31 along the first axis X and extends towards the proximal end of the delivery device 100, the first distal support part 323 is arranged at the distal end of the body part 31 along the first axis X and extends towards the distal end of the delivery device 100, and the extension direction of the first proximal support part 322 is arranged at a third non-right angle with the first axis, and / or the extension direction of the first distal support part 323 is arranged at a fourth non-right angle with the first axis X, thereby the elastic support member provides elastic deformation along the second axis. In other embodiments, the extension direction of the first proximal support part 322 is arranged at a third non-right angle with the first face, and / or the extension direction of the first distal support part 323 is arranged at a fourth non-right angle with the first face, so as to facilitate the first support part to provide elastic deformation along the second axis, thereby the elastic support member provides elastic deformation along the second axis. In the present embodiment, the body part is a plate structure, the plate face of the body part is arranged parallel to the first face, the extension direction of the first proximal support part 322 is arranged at a third non-right angle with the plate face of the body part, and / or the extension direction of the first distal support part 323 is arranged at a fourth non-right angle with the plate face of the body part.

[0076] In some embodiments of the present application, the number of the first support portions 32 can be two, and the two first support portions 32 are respectively arranged on the side of the body portion 31 away from the pusher 20 along the second axis Y and symmetrically arranged on the two ends of the body portion 31 along the first axis X. Among them, the two first support portions 32 are respectively a first proximal end support portion 322 and a first distal end support portion 323. The first proximal end support portion 322 is arranged on the proximal end of the body portion 31 along the first axis X and extends towards the proximal end of the conveying device 100. The first distal end support portion 323 is arranged on the distal end of the body portion 31 along the first axis X and extends towards the distal end of the conveying device 100. The extension direction of the first proximal end support portion 322 is arranged at a third included angle that is not a straight angle with the first axis X, and / or the extension direction of the first distal end support portion 323 is arranged at a fourth included angle that is not a straight angle with the first axis X. The structure design of each support portion of the elastic support member arranged as a diagonal leg can make the elastic support member 30 provide elasticity, and at the same time, facilitate the design adjustment of the elastic size of the elastic support member to meet the elastic demand. The first proximal end support portion 322 and the first distal end support portion 323 jointly abut the inner wall of the mounting cavity 18, which simultaneously improves the mounting stability, ensures the stability of the interference fit, and ensures the stress stability.

[0077] In some other embodiments of the present application, the number of the first support portions 32 can be more, and the more first support portions 32 are symmetrically arranged on the two ends of the body portion 31 along the first axis X, and the extension direction of any one of the first support portions 32 is respectively arranged at an included angle with the first axis X.

[0078] In combination with FIGS. 2 to 8, in some embodiments of the present application, the range of the third included angle is 30° to 60°, and the range of the fourth included angle is 30° to 60°. By setting the range value of the third and fourth included angles to be 30° to 60°, the friction requirement between the first support portion 32 and the inner wall of the mounting cavity 18 can be met, and at the same time, the elastic support member 30 along the second axis Y can have sufficient elastic deformation. Optionally, in one of the embodiments, the third included angle is 45°, and the fourth included angle is also 45°.

[0079] In combination with FIGS. 2 to 8, in some embodiments of the present application, all the first support portions 32 have a first abutment area with the inner wall of the mounting cavity 18, and all the second support portions 33 have a second abutment area with the pusher 20. The sum of the first abutment area and the second abutment area can be 10mm 2 -20mm 2 , and the first abutment area is smaller than the second abutment area, which can ensure that the elastic support member provides sufficient friction to the pusher plate, and at the same time, does not lose too much elasticity.

[0080] In some embodiments of the present application, the first support portion 32 is provided with a first end portion 321 abutting the inner wall of the mounting cavity 18, the dimension of the first end portion 321 along the third axis Z is greater than the dimension of the first end portion 321 along the first axis X, and the plane in which the first axis X and the second axis Y lie intersects the third axis Z. Optionally, the first axis X, the second axis Y and the third axis Z are perpendicular to each other.

[0081] In some embodiments of the present application, the portion of the first support portion 32 abutting the inner wall of the mounting cavity 18 is the first end portion 321, the first end portion 321 is curved at the tail end of the first support portion 32 and is arranged parallel to the push member 20, and the abutting surface between the first end portion 321 and the inner wall of the mounting cavity 18 can be a surface contact or a line contact. When it is a surface contact, the dimension of the abutting surface along the third axis Z is greater than the dimension along the first axis X. When it is a line contact, the abutting line is a line segment extending along the third axis Z. Optionally, as shown in FIGS. 7 and 8, one first proximal support portion and one first distal support portion are provided, and the total of the first abutting areas is 5 mm 2 .

[0082] In some embodiments of the present application, the second support portion 33 is provided with a second end portion 331 abutting the push member 20, the second end portion 331 is curved at the tail end of the second support portion 33 and is arranged parallel to the push member 20, the dimension of the second end portion 331 along the third axis Z is greater than the dimension of the second end portion 331 along the first axis X, and the plane in which the first axis X and the second axis Y lie intersects the third axis Z. Optionally, the first axis X, the second axis Y and the third axis Z are perpendicular to each other.

[0083] In some embodiments of the present application, the portion of the second support portion 33 abutting the push member 20 is the second end portion 331, the second end portion 331 is curved at the tail end of the second support portion 33 and is arranged parallel to the push member 20, and the abutting surface between the second end portion 331 and the push member 20 can be a surface contact or a line contact. When it is a surface contact, the dimension of the abutting surface along the third axis Z is greater than the dimension along the first axis X. When it is a line contact, the abutting line is a line segment extending along the third axis Z. Optionally, two second proximal support portions and two second distal support portions are provided, and the total of the second abutting areas is 10.8 mm 2The elastic support can be guaranteed to have enough contact area with the push plate to provide enough friction to prevent the push plate from moving backward due to the viscosity of the glue and the negative pressure of the syringe.

[0084] In some embodiments of the present application, the total strength of the first support portion 32 is less than the total strength of the second support portion 33, as shown in FIGS. 2-8. In other words, the elastic support 30 has greater elasticity on the side closer to the pusher 20 than on the side farther from the pusher 20. When the elastic support 30 is pressed on the second axis Y, the body portion 31 will shift toward the direction of the first support portion 32.

[0085] By setting the total strength of the first support portion 32 to be less than the total strength of the second support portion 33, the first support portion 32 is more susceptible to deformation than the second support portion 33 when the elastic support 30 is pressed on the second axis Y. The deformation on the side of the first support portion 32 is greater than the deformation on the side of the second support portion 33. Thus, the elastic support 30 has both elasticity and elastic deformation on the second axis Y, making it easier to use, and the friction between the elastic support 30 and the pusher 20 is not greatly reduced.

[0086] In some embodiments of the present application, the thickness of the first support portion 32 is in the range of 1.7mm to 2.3mm, and / or the thickness of the second support portion 33 is in the range of 1.7mm to 2.3mm, as shown in FIGS. 2-8.

[0087] In some embodiments of the present application, the thickness of the first support portion 32 can be any value in the range of 1.7mm to 2.3mm, making the first support portion 32 more susceptible to deformation and providing elastic force. Alternatively, the thickness of the first support portion 32 can be 2.0mm. The thickness of the second support portion 33 can be any value in the range of 1.7mm to 2.3mm, making the second support portion 33 more susceptible to deformation and providing elastic force. Alternatively, the thickness of the second support portion 33 can be 2.0mm.

[0088] In some embodiments of the present application, the elastic support 30 is in interference fit with the inner wall of the mounting cavity 18 and the pusher 20, and the interference amount is 0.3mm to 0.8mm, and optionally, the interference amount is 0.5mm. The interference amount herein refers to the height of the elastic support 30 on the second axis Y (the maximum height between the upper abutting surface and the lower abutting surface) when the elastic support 30 is not placed in the natural state in the mounting cavity, and the height difference between the upper and lower abutting positions of the elastic support in the mounting cavity on the second axis Y.

[0089] In some embodiments of the present application, the elastic support 30 is clamped between the inner wall of the mounting cavity 18 and the pusher 20, and is deformed by extrusion, that is, the elastic support 30 is in interference fit with the inner wall of the mounting cavity 18 and the pusher 20.

[0090] In some embodiments of the present application, in order to improve the support strength of the elastic support 30, the elastic support 30 is further provided with a reinforcing portion 34. Optionally, the first support portion 32 is provided with the reinforcing portion 34 at the end connected to the body portion 31, and the reinforcing portion 34 is arranged on the inner side of the first support portion 32. The reinforcing portion 34 can increase the thickness dimension of the connection part of the first support portion 32 and the body portion 31, thereby improving the support strength of the first support portion 32, keeping the end of the first support portion 32 away from the body portion 31 elastic, and avoiding excessive deformation of the first support portion 32 on the second axis Y, avoiding the first support portion 32 providing excessive elastic deformation, and avoiding the risk of failure of the elastic support due to aging.

[0091] In one of the embodiments, as shown in FIG. 8a, the two second support parts opposite to each other on the first axis X are provided with a reinforcing connector 38, i.e. the second proximal support part 332 and the second distal support part 333 are connected by the reinforcing connector 38, the reinforcing connector 38 can relatively enhance the stability of the relative position of the two second support parts connected by the reinforcing connector 38 on the first axis X, reduce the deformation of the second support part, i.e. the deformation of the second support part exists in the part of the second support part from the reinforcing connector 38 to the side thereof close to the pushing plate, thereby improving the support strength of the second support part, keeping the end of the second support part 33 close to the pushing plate elastic, but not too large in the deformation on the second axis Y, and ensuring that the total support strength of the elastic support 30 away from the pushing member 20 is less than the total support strength of the elastic support 30 close to the pushing member 20, thereby facilitating the extrusion of the elastic support 30 along the second axis Y, making one side of the first support part 32 more easily deformed than one side of the second support part 33, making the deformation of one side of the first support part 32 greater than the deformation of one side of the second support part, thereby ensuring that the elastic support 30 has elastic force and elastic deformation on the second axis, can save more power during injection, and ensuring that the friction between the elastic support 30 and the pushing member 20 does not lose much.

[0092] In combination with FIGS. 2-11, in some embodiments of the present application, the trigger assembly 40 includes a trigger 41 and a connector 42, the trigger 41 is rotatably connected to the housing 10, the connector 42 is rotatably connected to the part of the trigger 41 arranged in the mounting cavity 18, the pushing member 20 is provided with a plurality of first tooth-shaped parts 24 on the surface thereof away from the elastic support 30 along the second axis Y, the plurality of first tooth-shaped parts 24 are arranged in sequence along the first axis X, the connector 42 is provided with at least one second tooth-shaped part 424 on the surface thereof facing the pushing member 20 along the second axis Y, the second tooth-shaped part 424 is in meshing and transmission connection with the first tooth-shaped part 24. In other embodiments, the connector 42 is provided with at least two second tooth-shaped parts 424 on the surface thereof facing the pushing member 20 along the second axis Y, as shown in FIG. 9 in combination with FIG. 11, three second tooth-shaped parts are arranged, which can increase the contact between the connector 42 and the pushing member 20, and make the pushing more labor-saving.

[0093] In some embodiments of the present application, part of the trigger 41 is inserted into the mounting cavity 18 and used to mount the connector 42, the connector 42 can be in transmission connection with the pushing member 20 under the drive of the trigger 41, thereby driving the pushing member 20 to move towards the fixed part 13, and then driving the push rod 202 to move towards the fixed part 13 through the pushing member 20, to realize the liquid injection process of the syringe 200.

[0094] As shown in FIGS. 2-4 in combination with FIGS. 6 and 10, a portion of the trigger 41 is inserted into the mounting cavity 18 and rotatably connected to the housing 10. Another portion of the trigger 41 is arranged outside the housing 10 for easy operation. The portion of the trigger 41 arranged outside the housing 10 is provided with a first arc surface 411 and a second arc surface 412 for easy holding and operation. The portion of the trigger 41 arranged inside the mounting cavity 18 is provided with a first insertion hole 413 and a second insertion hole 414. The first insertion hole 413 is used for inserting the first pin shaft 43 and rotatably sleeving the outside of the first pin shaft 43, which is fixed in the mounting cavity 18 to realize the rotation of the trigger 41. The outside of the first pin shaft 43 is further sleeved with the first torsion spring 44, one end of which abuts against the inner wall of the mounting cavity 18 and the other end of which abuts against the trigger 41. When the trigger 41 is pressed, the first torsion spring 44 is elastically deformed by being squeezed. When the pressing force of the trigger 41 is lost, the first torsion spring 44 can restore to the original state by its elastic force and drive the trigger 41 to restore to the original position for further pressing. The second insertion hole 414 is used for inserting the second pin shaft 45 and connecting the second pin shaft 45. The connecting piece 42 is rotatably sleeved outside the second pin shaft 45 to realize the rotation of the connecting piece 42 relative to the trigger 41. As shown in FIG. 11, the connecting piece 42 includes a support frame 421, which is a frame structure with an opening in the center, and a portion of the trigger 41 can be inserted into the opening. The opposite sides of the support frame 421 are respectively provided with a third insertion hole 422, and the second pin shaft 45 can pass through the third insertion hole 422 and the second insertion hole 414 to realize the rotational connection of the support frame 421 and the trigger 41. The outside of the second pin shaft 45 is further sleeved with the second torsion spring 46, one end of which abuts against the trigger 41 and the other end of which abuts against the support frame 421. When the trigger 41 is pressed, it rotates and squeezes the second torsion spring 46. The second torsion spring 46 is squeezed and elastically deformed, and at the same time drives the connecting piece 42 to move together, thereby driving the pushing piece 20 to move towards the distal end and squeeze the push rod 202. When the pressing force of the trigger 41 is lost, the first torsion spring 44 and the second torsion spring 46 restore to the original state by their elastic force and drive the trigger 41 and the connecting piece 42 to restore to the original position for further pressing and pushing the pushing piece 20.

[0095] Wherein, in order to facilitate the connection piece 42 to push the pusher 20 to move along the first axis X towards the distal end, the pusher 20 is provided with a plurality of first tooth-shaped portions 24 along the second axis Y away from the surface of the elastic support 30, i.e. the surface of the pusher 20 towards the trigger 41 is provided with a plurality of first tooth-shaped portions 24, and the plurality of first tooth-shaped portions 24 are arranged along the first axis X in sequence, and the connection piece 42 is provided with at least one second tooth-shaped portion 424 along the second axis Y towards the surface of the pusher 20, the second tooth-shaped portion 424 is engaged and drivingly connected with the first tooth-shaped portion 24. When the trigger 41 is pressed, the trigger 41 rotates around the first pin shaft 43 as the center, drives the connection piece 42 to move along the first axis X towards the fixed part 13 through the second pin shaft 45, and drives the pusher 20 to push the push rod 202 through the driving cooperation of the first tooth-shaped portion 24 and the second tooth-shaped portion 424, so as to realize injection. When the pressing of the trigger 41 is stopped, the trigger 41 drives the connection piece 42 to return to the original position through the second pin shaft 45, and in the process of separating the connection piece 42 and the pusher 20, the pusher 20 will not move towards the direction away from the fixed part 13 under the action of the friction force of the elastic support 30, thereby improving the position accuracy of the pusher 20 and the push rod 202. Since the plurality of first tooth-shaped portions 24 are arranged along the first axis X in sequence, and the adjacent first tooth-shaped portions are arranged at equal intervals, the trigger 41 can be pressed multiple times, and the second tooth-shaped portion 424 and the plurality of first tooth-shaped portions 24 are drivingly connected in sequence, so as to realize the quantitative pushing of the pusher 20 and improve the accuracy of injection. Optionally, the number of the second tooth-shaped portion 424 can be multiple, and the plurality of second tooth-shaped portions 424 are arranged along the first axis X in sequence, which can increase the contact area between the connection piece 42 and the pusher 20, make the pushing more labor-saving, and also improve the transmission reliability between the connection piece 42 and the pusher 20.

[0096] In combination with FIGS. 2-11, in some embodiments of the present application, the first tooth-shaped portion 24 is provided with a first side surface 241 abutting against the second tooth-shaped portion 424, and the second tooth-shaped portion 424 is provided with a second side surface 4241 abutting against the first tooth-shaped portion 24, wherein at least one of the first side surface 241 and the second side surface 4241 is perpendicular to the first axis X.

[0097] In some embodiments of the present application, as shown in FIG. 7 in combination with FIG. 9, the first side surface 241 and the second side surface 4241 can be perpendicular to the first axis X, respectively. That is, the first toothed portion 24 and the second toothed portion 424 abut and engage at an angle perpendicular to the first axis X, thereby ensuring that the first toothed portion 24 and the second toothed portion 424 have the maximum contact stroke therebetween, and the contact time of the connecting member 42 to the pushing member 20 can be maximized, thereby providing the pushing member 20 with the maximum pushing stroke along the first axis X. When the first side surface 241 and the second side surface 4241 abut and engage at an angle less than 90° to the first axis X, the maximum stroke of the pushing member 20 can be reduced, and when the first side surface 241 and the second side surface 4241 abut and engage at an angle greater than 90° to the first axis X, interference can occur during the abutting and engaging process, thereby making transmission inconvenient.

[0098] In some embodiments of the present application, as shown in FIGS. 2 to 12, the delivery device 100 further comprises a pressing member 50, at least part of the pressing member 50 is arranged in the mounting cavity 18 and is arranged on the side of the elastic support 30 away from the pushing member 20 along the second axis Y, the elastic support 30 is provided with a support column 35 facing the pressing member 50, the pressing member 50 is sleeved outside the support column 35 and can reciprocate along the second axis Y, the pressing member 50 is provided with an abutting portion 52, and the pressing member 50 is configured to abut against the connecting member 42 through the abutting portion 52 during movement of the pressing member 50 along the second axis Y towards the pushing member 20, and to push the connecting member 42 away from the pushing member 20.

[0099] In some embodiments of the present application, the pressing member 50 comprises a pressing portion 51 and an abutting portion 52, wherein part of the pressing portion 51 is arranged outside the housing 10, and the other part of the pressing portion 51 is arranged in the mounting cavity 18 and is sleeved outside the support column 35 for pressing operation. The abutting portion 52 is arranged in the mounting cavity 18 and can abut against the connecting member 42 during pressing of the pressing portion 51, thereby pushing the connecting member 42 to move along the second axis Y away from the pushing member 20, so as to separate the connecting member 42 from the pushing member 20, facilitate manual retraction of the pushing member 20, and make the delivery device reusable.

[0100] Specifically, pressing the pressing member 50 can separate the first toothed portion 24 and the second toothed portion 424, thereby releasing the limiting effect of the second toothed portion 424 on the first toothed portion 24 along the first axis X, and then the pushing member 20 can be moved along the first axis X away from the push rod 202. Wherein the support frame 421 is provided with an extending end 423 on the side of the pushing member 20 along the second axis Y, and the abutting portion 52 can abut with the extending end 423, so as to drive the connecting member 42 to rotate through the pressing portion 51, and make the connecting member 42 separate from the pushing member 20. In order to improve the stability of the pressing member 50 when pressing the connecting member 42, the number of the abutting portion 52 is two, and the two abutting portions 52 are oppositely arranged along the third axis Z. The number of the extending end 423 is consistent with the number of the abutting portion 52, and the extending end 423 is arranged one by one corresponding to the abutting portion 52. At the same time, the size of the end of the abutting portion 52 in contact with the extending end 423 is greater than the size of the end of the abutting portion 52 facing the pressing portion 51, so as to increase the contact area of the abutting portion 52 and the extending end 423, and improve the stability of the pressing process. Wherein the two extending ends 423 are respectively arranged on both sides of the connecting member 42 along the third axis Z, and extend to the side of the pushing member 20 along the second axis Y facing the pressing member 50, and abut with the abutting portion 52, as shown in Figures 11-12 in combination with Figure 6.

[0101] Optionally, the support column 35 can be arranged at the center position of the body portion 31, and the surface of the pressing portion 51 facing the support column 35 is provided with a sleeve portion 53, and the center of the sleeve portion 53 is provided with a cylindrical hole, and the support column 35 is inserted into the cylindrical hole. In order to facilitate the pressing portion 51 to automatically rebound to the original position after pressing, the outside of the support column 35 is sleeved with a spring (not shown in the figure), and one end of the spring abuts with the body portion 31, and the other end abuts with the pressing member 50.

[0102] In some embodiments of the present application, as shown in Figure 8, the body portion 31 is further provided with a protruding portion 36 on the side facing the pressing member 50, the protruding portion 36 is annularly arranged outside the support column 35, and can be partially arc-shaped; the two ends of the protruding portion 36 are respectively connected with the two first support portions 32, so as to improve the connection strength of the first support portion 32, thereby preventing the first support portion 32 from being too elastic or being broken, and facilitating to adjust the elasticity of the elastic support 30, while maintaining the connection strength, and also avoiding the possibility of elastic failure caused by aging of the elastic support. After the spring is sleeved outside the support column 35, the end of the spring abutting with the body portion 31 is located between the support column 35 and the protruding portion 36, so as to limit the radial direction of the spring through the support column 35.

[0103] In some embodiments of the present application, the elastic support 30 is provided with an avoiding opening 37 at both ends along the third axis Z, the abutting portion 52 is arranged in the avoiding opening 37, and the plane where the first axis X and the second axis Y are located intersects the third axis Z. In some embodiments of the present application, since the pressing member 50 and the connecting member 42 are arranged on both sides of the elastic support 30 along the second axis Y respectively, in order to prevent the abutting of the elastic support 30 to the pressing member 50 and the connecting member 42 from causing interference, the body portion 31 of the elastic support 30 is provided with an avoiding opening 37 at both ends along the third axis Z, the abutting portion 52 is arranged in the avoiding opening 37, and the extending end 423 can abut against the abutting portion 52, or the extending end 423 is arranged in the avoiding opening 37 and can abut against the abutting portion 52, or the extending end 423 and the abutting portion 52 abut against each other at the avoiding opening 37.

[0104] In combination with FIGS. 2 to 13, in some embodiments of the present application, the pushing member 20 is provided with a first limiting rib 22 on the surface facing the elastic support 30, the first limiting rib 22 extends along the first axis X, and the free ends of at least two of the plurality of second support portions 33 are arranged on both sides of the first limiting rib 22 along the third axis Z, and the plane where the first axis X and the second axis Y are located intersects the third axis Z.

[0105] In some embodiments of the present application, the pushing member 20 comprises a plate body portion 21 which is a substantially plate-shaped structure, and the plate body portion 21 is provided with a first limiting rib 22 on the surface facing the elastic support 30, and the first limiting rib 22 extends along the first axis X. The second support portion 33 comprises a fixed end and a free end, the fixed end is connected to the body portion 31, and the free end abuts against the plate body portion 21 and is used to provide a friction force. Two second proximal support portions cross the first limiting rib 22, and two second distal support portions cross the first limiting rib 22, so that the elastic support 30 and the pushing member 20 are limited along the third axis Z by the cooperation of the first limiting rib 22 and the second support portions 33 on both sides. Optionally, the elastic support 30 comprises two second proximal support portions 332 arranged at the proximal end and two second distal support portions 333 arranged at the distal end, the two second proximal support portions 332 are arranged on both sides of the first limiting rib 22 along the third axis Z respectively, and the two second distal support portions 333 are arranged on both sides of the first limiting rib 22 along the third axis Z respectively.

[0106] In some embodiments of the present application, the number of the first limiting ribs 22 can be two, and the two first limiting ribs 22 are spaced along the third axis Z. The number of the second supporting portions 33 can be four, and the body portion 31 is provided with two second proximal supporting portions and two second distal supporting portions respectively, and the two second proximal supporting portions are spaced along the third axis Z, the two first limiting ribs 22 are spaced along the third axis Z, and the two second proximal supporting portions cross the two first limiting ribs 22, and the two second distal supporting portions cross the two first limiting ribs 22, that is, the two first limiting ribs 22 are spaced between the two proximal supporting portions, the two first limiting ribs 22 are spaced between the two distal supporting portions, and the free ends of the four second supporting portions 33 abut the plate body portion 21 respectively.

[0107] In some embodiments of the present application, as shown in FIGS. 2 to 15, the mounting cavity 18 is provided with a plurality of first guide ribs 15, and the plurality of first guide ribs 15 are spaced along the circumference of the first axis X, and the end faces of the plurality of first guide ribs 15 jointly form a guide cavity 19, and the guide cavity 19 extends along the first axis X, and the distal head of the pushing member 20 is slidably arranged in the guide cavity 19.

[0108] In some embodiments of the present application, by arranging a plurality of first guide ribs 15 in the mounting cavity 18, the plurality of first guide ribs 15 are spaced along the circumference of the first axis X in the mounting cavity 18, so that the plurality of first guide ribs 15 jointly form a limiting structure along the circumference of one end of the pushing member 20, the limiting structure forms a guide cavity 19 for accommodating the pushing member 20, so that the distal head of the pushing member 20 moves along the first axis X in the guide cavity 19.

[0109] In some embodiments of the present application, as shown in FIGS. 2 to 15, the mounting cavity 18 is provided with a plurality of first guide ribs 15, and a guide groove 151 is formed between two adjacent first guide ribs 15 along the second axis Y, and as shown in FIG. 7, part of the pushing member 20 is embedded in the guide groove 151 and can move along the first axis X.

[0110] In some embodiments of the present application, as shown in FIG. 14, the mounting cavity 18 is provided with a plurality of partitions 16, and the plate surface of the partition 16 is arranged along the second axis Y, and the partition 16 is connected with the inner wall of the mounting cavity 18, so as to improve the supporting strength of the shell 10. The mounting cavity 18 is divided into a first cavity 181 and a second cavity 182 along the first axis X, wherein the end of the first cavity 181 away from the second cavity 182 is provided with a fixed portion 13, the push rod 202 of the syringe 200 is arranged in the first cavity 181, and the second cavity 182 is used for mounting the trigger assembly 40, the elastic supporting member 30 and the pushing member 20, part of the pushing member 20 can extend into the first cavity 181 and is used for pushing the push rod 202.

[0111] Optionally, the first chamber 181 is provided with a plurality of first guide ribs 15 on both sides along the third axis Z, each of the first guide ribs 15 extends along the first axis X, and a guide groove 151 is formed between two first guide ribs 15 on the same side. The plate body 21 of the pushing member 20 can be embedded in the guide groove 151 on both sides along the third axis Z, so that the pushing member 20 can only move along the first axis X under the action of the guide groove 151 and cannot be tilted, thereby ensuring the stability of the pushing.

[0112] Optionally, the second chamber 182 is provided with a plurality of second guide ribs 17 on both sides along the third axis Z, each of the second guide ribs 17 extends along the first axis X, and an extension guide portion along the first axis X is formed between two second guide ribs 17 on the same side, so that the pushing member 20 can ensure the stability of the pushing during the entire stroke along the first axis X.

[0113] Optionally, the first chamber 181 is further provided with two first positioning ribs 14, the two first positioning ribs 14 are arranged along the second axis Y, and the plurality of first guide ribs 15 are located between the two first positioning ribs 14. The cavity formed between the two first positioning ribs 14 has a size along the second axis Y which is substantially equal to the size of the push rod 202 along the second axis Y. The push rod 202 of the syringe 200 is arranged between the two first positioning ribs 14, so as to reduce the shaking of the push rod along the second axis Y by the two first positioning ribs 14.

[0114] In combination with FIGS. 2 to 15, in some embodiments of the present application, the pushing member 20 is provided with a head 23 (a distal end head), the head 23 is arranged in the guide cavity 19 in a manner that can slide along the first axis X, the end surface of the first guide rib 15 is matched with the outer contour surface of the head 23, and the outer contour surface of the head 23 is in contact with the end surface of the first guide rib 15 without pressing force or with a spacing, so as to ensure that the pushing member 20 is smoothly pushed.

[0115] As shown in FIG. 13, the plate body 21 further includes an embedding portion 211 for embedding in the guide groove 151, the embedding portion 211 protrudes from the head 23 along the plate surface of the plate body 21 in a direction perpendicular to the first axis X. Optionally, the embedding portion 211 protrudes from the head 23 along the third axis, so that when the embedding portion 211 is embedded in the guide groove 151, the head 23 can smoothly move along the guide cavity along the first axis X, while maintaining the stability of the pushing, and preventing the distal end head of the pushing member 20 from being tilted.

[0116] In some embodiments of the present application, the head 23 of the pushing member 20 is inserted into the guide cavity 19 and used to abut against the tail of the push rod 202. In order to make the head 23 push the push rod 202 more smoothly, the end surface of the head 23 can be shaped to match or cooperate with the end surface of the tail of the push rod 202, and optionally, the end surface of the head 23 can be circular. In this case, the end surface of the first guide rib 15 facing the head 23 matches the outer profile surface (the circumferential surface around the first axis X) of the head 23 and is in contact with the outer profile surface of the head 23 without pressing force or with a spacing. When the end surface of the first guide rib 15 facing the head 23 is in contact with the head 23 without pressing force, the head 23 can be limited along the third axis Z, so that the pushing member 20 moves along the first axis X, reducing or avoiding the shaking of the pushing member 20 and causing the pushing to be unstable. Optionally, when the distal end surface of the head 23 is circular, the outer profile surface of the head 23 is a circular surface, and the end surface of the first guide rib 15 facing the head 23 can be a partial circular arc surface matching the circular surface.

[0117] In combination with the embodiments shown in FIGS. 1-16, the second aspect of the present application further provides a delivery system 1000, which includes the delivery device 100 of any of the above embodiments, and further includes a syringe 200, a glue feeding catheter 300, and a delivery sheath 400. The syringe 200 includes a tube 201 and a push rod 202, the tube 201 is embeddedly connected with the fixed part 13, and the push rod 202 is arranged in the mounting cavity 18 and partially inserted into the tube 201. The pushing member 20 is arranged on the side of the push rod 202 away from the tube 201 along the first axis X. The glue feeding catheter 300 is connected with the liquid outlet end of the tube 201, and the delivery sheath 400 is arranged outside the glue feeding catheter 300. The end of the glue feeding catheter 300 away from the syringe 200 extends to the outside of the delivery sheath 400, facilitating direct glue injection to the target position.

[0118] In some embodiments of the present application, the tube 201 of the syringe 200 is fixed to the housing 10 through the fixed part 13. The push rod 202 of the syringe 200 is arranged in the mounting cavity 18, so as to be pushed by the pushing member 20, thereby extruding the medical glue in the tube 201 to achieve injection. Most of the tube 201 is arranged outside the housing 10, and the glue feeding catheter 300 is connected with the liquid outlet end of the tube 201, so that the medical glue can be injected into the body through the glue feeding catheter 300. In order to facilitate the delivery of the glue feeding catheter 300, the delivery system 1000 is provided with the delivery sheath 400, which is used to establish a delivery channel. The glue feeding catheter 300 can enter the human body along the delivery channel established by the delivery sheath 400, and the end of the glue feeding catheter 300 away from the syringe 200 can extend to the outside of the delivery sheath 400. The part of the glue feeding catheter 300 extending to the outside of the delivery sheath 400 is provided with a developing structure, so as to facilitate the observation of the position of the distal end of the glue feeding catheter 300, thereby improving the accuracy of the injection position.

[0119] Optionally, the delivery system 1000 further comprises a first connector 301 and a second connector 401, which can be luer connectors. The proximal end of the first connector 301 is in communication with the syringe 200, and the distal end of the first connector 301 is in communication with the inlet tube 300, thereby realizing the communication between the syringe 200 and the inlet tube 300. The delivery sheath 400 is sleeved on the outside of the inlet tube 300 and connected with the distal end of the first connector 301 through the second connector 401, thereby realizing the connection between the delivery sheath 400 and the inlet tube 300.

[0120] According to the delivery system 1000 of the present application, the tube body 201 of the syringe 200 is connected to the housing 10 through the fixing portion 13 at one end of the installation cavity 18 along the first axis X, and the push rod 202 of the syringe 200 is arranged in the installation cavity 18 in a manner movable along the first axis X, the pusher 20 is inserted into the installation cavity 18 and movable along the first axis X towards the push rod 202, thereby pushing the push rod 202 to move along the first axis X to realize the injection of the syringe 200. When the medical glue is stored in the syringe 200, the push rod 202 can be pushed by the pusher 20 to realize the injection of the medical glue into the vein.

[0121] Meanwhile, the elastic support 30 is arranged in the installation cavity 18 of the housing 10 and abuts against the pusher 20 to provide friction to the pusher 20. When there is no external force acting on the pusher 20 to push the push rod 202 during the injection process, the friction can counteract the pushing force of the push rod 202, thereby avoiding the movement of the push rod 202 and the pusher 20 towards the direction away from the tube body 201 of the syringe 200, improving the positional accuracy of the pusher 20 and the push rod 202 during the injection process, improving the injection accuracy and reducing the occurrence of medical accidents. Meanwhile, when it is needed to push the pusher 20 to move towards the push rod 202, the elastic support 30 is compressed and deformed along the second axis Y. Compared with the support without elastic deformation, the resistance of the elastic support 30 to the pusher 20 can be reduced during the process that the trigger assembly 40 contacts the pusher 20 and pushes the pusher 20 to move forward, thereby making the pushing more labor-saving. When the trigger assembly 40 (the connecting member 42) and the pusher 20 are separated from each other, the trigger assembly 40 no longer contacts the pusher 20 at this time, and the trigger assembly 40 has no force acting on the pusher 20, and has no component force on the second axis. At this time, the elastic support 30 is interference-fitted to the pusher 20 and provides static friction and support force to the pusher 20, so that the static friction of the elastic support 30 to the pusher 20 prevents the retraction of the push rod.

[0122] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any changes or replacements within the technical scope disclosed by the present application, which can be easily thought by those skilled in the art, should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A delivery device characterized by, The application relates to a delivery device, comprising: a housing, an inner portion of the housing being formed with a mounting cavity, the mounting cavity being provided with a fixed portion at one end of a first axis; a pusher, at least a portion of the pusher being arranged in the mounting cavity, the pusher being configured to be movable along the first axis towards the fixed portion; a resilient support, the resilient support being arranged in the mounting cavity and at one side of the pusher along a second axis, the second axis being perpendicular to the first axis, a plane along the first axis and perpendicular to the second axis being defined as a first plane, the resilient support providing the pusher with an elastic force non-parallel to the first plane.

2. The delivery device of claim 1, wherein, The resilient support comprises a body portion, a first support portion and a second support portion, the first support portion extending from the body portion towards a side away from the pusher and abutting against an inner wall of the mounting cavity, the second support portion extending from the body portion towards a side close to the pusher and abutting against the pusher, at least one of the first support portions extending towards a direction non-perpendicular to the first plane, and at least one of the second support portions extending towards a direction non-perpendicular to the first plane.

3. The delivery device of claim 2, wherein, The number of the second support portions is plural, the plural second support portions comprising a second proximal end support portion and a second distal end support portion, the second proximal end support portion being arranged at a proximal end of the body portion along the first axis and extending towards a proximal end of the delivery device, the second distal end support portion being arranged at a distal end of the body portion along the first axis and extending towards a distal end of the delivery device, the second proximal end support portion being arranged at a first included angle non-perpendicular to the first axis, and / or the second distal end support portion being arranged at a second included angle non-perpendicular to the first axis.

4. The delivery device of claim 3, wherein, The first included angle ranges from 30 DEG to 60 DEG, and / or the second included angle ranges from 30 DEG to 60 DEG.

5. The delivery device of claim 3, wherein, The delivery device further comprises a trigger assembly, at least a portion of the trigger assembly being arranged in the mounting cavity and at another side of the pusher along the second axis, the trigger assembly being configured to drive the pusher to move towards the fixed portion along the first axis, an abutting position of the trigger assembly and the pusher being located between the second proximal end support portion and the second distal end support portion.

6. The delivery device of claim 2, wherein, The number of the first support portions is plural, the plural first support portions comprising a first proximal end support portion and a first distal end support portion, the first proximal end support portion being arranged at a proximal end of the body portion along the first axis and extending towards a proximal end of the delivery device, the first distal end support portion being arranged at a distal end of the body portion along the first axis and extending towards a distal end of the delivery device, the first proximal end support portion being arranged at a third included angle non-perpendicular to the first axis, and / or the first distal end support portion being arranged at a fourth included angle non-perpendicular to the first axis.

7. The delivery device of claim 6, wherein, The third included angle ranges from 30 DEG to 60 DEG, and / or the fourth included angle ranges from 30 DEG to 60 DEG.

8. The delivery device of claim 2, wherein, The first supporting part is provided with a first end part abutting against the inner wall of the mounting cavity, the dimension of the first end part along the third axis is greater than the dimension of the first end part along the first axis, and the plane where the first axis and the second axis are located intersects the third axis.

9. The delivery device of claim 8, wherein, The second supporting part is provided with a second end part abutting against the pushing part, the dimension of the second end part along the third axis is greater than the dimension of the second end part along the first axis, and the plane where the first axis and the second axis are located intersects the third axis.

10. The delivery device of claim 2, wherein, The supporting strength of the first supporting part is less than the supporting strength of the second supporting part.

11. The delivery device of any one of claims 1 to 10, wherein, The elastic supporting part is in interference fit with the inner wall of the mounting cavity and the pushing part, and the interference amount is 0.3mm to 0.8mm.

12. The delivery device of any one of claims 1 to 10, wherein, The conveying device further comprises a trigger assembly, the trigger assembly comprises a trigger and a connecting part, the trigger is rotatably connected with the shell, the connecting part is rotatably connected with the part of the trigger located in the mounting cavity, the pushing part is provided with a plurality of first tooth-shaped parts on the surface thereof away from the elastic supporting part along the second axis, the plurality of first tooth-shaped parts are sequentially arranged along the first axis, the connecting part is provided with at least one second tooth-shaped part on the surface thereof facing the pushing part along the second axis, and the second tooth-shaped part is in meshing and transmission connection with the first tooth-shaped part.

13. The delivery device of any one of claims 1 to 10, wherein, A plurality of first guide ribs are arranged in the mounting cavity, the plurality of first guide ribs are arranged in a circumferential direction along the first axis, and the end faces of the plurality of first guide ribs enclose a guide cavity, the guide cavity extends along the first axis, and the pushing part is slidably arranged in the guide cavity.

14. The delivery device of any of claims 1-10, wherein, A plurality of first guide ribs are arranged in the mounting cavity, a guide groove is formed between two adjacent first guide ribs, and part of the pushing part is embedded in the guide groove and can move along the first axis.

15. A delivery system characterized by, The conveying system comprises the conveying device according to any one of claims 1 to 14, and further comprises: a syringe, the syringe comprises a tube and a push rod, the tube is connected with the fixed part, the push rod is arranged in the mounting cavity, and part of the push rod is inserted into the tube, and the pushing part is arranged on the side of the push rod away from the tube along the first axis; a glue feeding guide pipe, the glue feeding guide pipe is connected with the liquid outlet end of the tube; a conveying sheath, the conveying sheath is sleeved outside the glue feeding guide pipe, and the end of the glue feeding guide pipe away from the syringe extends to the outside of the conveying sheath.

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