Needle tip and needle

Abstract

The present invention provides an injection needle tip and an injection needle, comprising: an injection connection assembly, used to be connected to the injection needle; a detachable assembly, comprising a quick-release upper buckle assembly and a quick-release lower buckle assembly, wherein the quick-release upper buckle assembly is connected to the injection connection assembly; an injection needle tip body, connected to the quick-release lower buckle assembly; wherein the position state between the quick-release upper buckle assembly and the quick-release lower buckle assembly comprises a first position state and a second position state, wherein in the first position state, the quick-release upper buckle assembly is connected to the quick-release lower buckle assembly, thereby connecting to the injection needle tip body, and in the second position state, the quick-release upper buckle assembly and the quick-release lower buckle assembly are separated from each other, thereby releasing the injection needle tip body.

Description

Technical Field

[0001] The invention belongs to the technical field of medical equipment, and in particular relates to an injection needle tip and an injection needle. Background Art

[0002] Retinal vascular injection is a feasible way to treat retinal vascular embolism, but this procedure requires the doctor to first insert the injection needle into a blood vessel with a diameter of less than 100 microns, and then remain still for a long time to inject drugs (such as thrombolytics) into the blood vessel. In this process, extremely small misoperations and tremors can cause irreversible eye damage. However, this requirement has exceeded the limits of the human body, and manual operation is almost impossible. It must be completed with the help of robotic technology.

[0003] If a robot is used to perform retinal vascular injection, a reasonable end effector is bound to be required. The end effector needs to be equipped with an injection needle to complete the injection task. At the same time, the injection needle should have a force sensing function, which can accurately sense the contact force between the injection needle and the retinal blood vessels with sub-millinewton accuracy to prevent excessive contact force from damaging the eye tissue. And the surface of the injection needle should be smooth enough to prevent excessive friction from pulling the eye tissue and causing unnecessary pulling damage. Finally, from a practical point of view, the end effector should be able to be quickly disassembled and replaced to reduce the operational burden in clinical use.

[0004] The related technology provides an ophthalmic robot end device for vitreoretinal surgery, which consists of a linear motion part, a rotating part and a micro-force sensor. A stepper motor is used to control the feeding and rotation of the surgical hook. At the same time, the fiber Bragg grating (FBG) evenly distributed on the diameter of the surgical hook is used to measure the change in wavelength to achieve the measurement of radial force and axial torque.

[0005] The related technology also provides an ophthalmic surgical robot terminal structure, including a main seat, a rotating seat, a fixed seat, terminal forceps, a first linear drive device, a second linear drive device, and a rotating drive device. The rotating seat is arranged in the main seat, and the two ends of the rotating seat are rotatably connected to the two ends of the main seat. The rotating drive device is arranged on the main seat, and the output end of the rotating drive device is transmission-connected to the rotating seat to drive the rotating seat to rotate. The main seat is slidably connected to the fixed seat, and the second linear drive device is arranged on the fixed seat to drive the main seat to slide on the fixed seat.

[0006] The related technology provides an ophthalmic surgical robot end effector with enhanced tactile detection. One end of the injection needle core penetrates the injection syringe and is connected to the tactile force enhancement structure, which is arranged on the tray. An FBG fiber Bragg grating is arranged on the injection needle core near the injection syringe to realize the lateral force detection of the forceps barrel; the injection syringe is connected to the pin shaft through the forceps barrel bearing fixing ring, one end of the pin shaft is connected to the front bracket, and the other end penetrates the forceps barrel bearing fixing ring and the linear bearing and is connected to the spin gear on the tray; the injection syringe is connected to the linear drive module arranged on the tray through an arc-shaped connector to realize the axial force detection of the forceps core.

[0007] However, the disassembly and assembly process in the above solution is cumbersome and the operation is unreliable, which increases the operational burden in clinical use. Summary of the invention

[0008] The present invention provides an injection needle tip and an injection needle, which can at least solve the technical problems in the above-mentioned solution that the disassembly and assembly process is complicated, the operation is unreliable, and the operating burden in clinical use is increased.

[0009] In one aspect, there is provided an injection needle tip, comprising:

[0010] An injection connection assembly, used for connecting with an injection needle;

[0011] A detachable assembly, comprising a quick-release upper buckle assembly and a quick-release lower buckle assembly, wherein the quick-release upper buckle assembly is connected to the injection connection assembly;

[0012] The injection needle end body is connected to the quick-release buckle assembly;

[0013] Among them, the position state between the quick-release upper buckle assembly and the quick-release lower buckle assembly includes a first position state and a second position state. In the first position state, the quick-release upper buckle assembly is connected to the quick-release lower buckle assembly, and then connected to the injection needle end body. In the second position state, the quick-release upper buckle assembly is separated from the quick-release lower buckle assembly, thereby releasing the injection needle end body.

[0014] In an optional embodiment, the injection connection assembly includes: a Luer connector and an adapter tube;

[0015] One end of the Luer connector is used to connect with the injection needle, and the other end is connected with the adapter tube;

[0016] The adapter tube is connected to the quick-release upper buckle assembly;

[0017] Wherein, the adapter tube is provided with a liquid injection hole, and the liquid injection hole is used to connect with the injection pump.

[0018] In an optional embodiment, the diameter of the Luer connector is smaller than the diameter of the Luer connector;

[0019] The Luer connector and the adapter tube are integrally formed.

[0020] In an optional embodiment, the outer wall of the adapter tube is provided with an internal thread, the quick-release upper buckle assembly is provided with an external thread, and the adapter tube is threadedly connected to the adapter tube.

[0021] In an optional embodiment, the quick-release upper buckle assembly includes: an upper buckle body,

[0022] The first end face of the upper buckle body is connected to the injection connection assembly, and a convex conical surface is provided on the second end face along the circumferential direction. A quick-release pressure hole is provided on at least one side of the convex conical surface. The upper buckle body switches between the first position state and the second position state with the quick-release lower buckle assembly through the convex conical surface and the quick-release pressure hole.

[0023] In an optional embodiment, the quick-release lower buckle assembly includes: a lower buckle support, a ball plunger and a concave cone surface;

[0024] The lower buckle support is connected to the injection needle terminal body;

[0025] The concave cone surface is evenly arranged along the lower buckle support;

[0026] The ball plunger is arranged on the concave conical surface, and the concave conical surface is in contact with the convex conical surface. The quick-release pressure hole squeezes the ball plunger or moves away from the ball plunger to achieve switching between the first position state and the second position state with the quick-release lower buckle assembly.

[0027] In an optional embodiment, the ball plunger comprises a plunger, a ball head and an elastic connector;

[0028] The plunger is provided with a connecting hole, the elastic connecting piece is arranged at the bottom of the plunger, and the ball head is connected to the elastic connecting piece through the connecting hole;

[0029] When the quick-release pressure hole squeezes the ball head, the quick-release upper buckle assembly and the quick-release lower buckle assembly are located in the first position state, thereby connecting the injection needle end body;

[0030] When the quick-release pressure hole is away from the ball head, the quick-release upper buckle assembly and the quick-release lower buckle assembly are located in the second position state, thereby releasing the injection needle terminal body.

[0031] In an optional embodiment, it further comprises a counting chip, wherein the counting chip is arranged between the injection connection component and the detachable component;

[0032] The counting chip is used to complete the encrypted communication between the injection needle tip and the surgical robot.

[0033] On the other hand, an injection needle is provided, comprising any one of the injection needle ends described above and an injection needle connected to the injection needle end, and a fiber Bragg grating connected to the outer side of the injection needle.

[0034] In an optional embodiment, the injection needle comprises: a long catheter, a sleeve and a fiber Bragg grating 19;

[0035] The long catheter is connected to the injection connection assembly;

[0036] The fiber Bragg grating is arranged along the circumference of the long conduit;

[0037] The sleeve is sleeved on the fiber Bragg grating.

[0038] The injection needle tip provided by the embodiment of the present invention has at least the following beneficial effects:

[0039] The injection needle tip provided by the embodiment of the present invention is based on a detachable assembly including a quick-release upper buckle assembly and a quick-release lower buckle assembly, and the position state between the quick-release upper buckle assembly and the quick-release lower buckle assembly includes a first position state and a second position state. In the first position state, the quick-release upper buckle assembly can be connected to the quick-release lower buckle assembly to connect the injection needle tip body. In the second position state, the quick-release upper buckle assembly can be separated from the quick-release lower buckle assembly to release the injection needle tip body. Through the above technical features, the injection needle and the injection needle tip can be quickly released (disassembled injection needle tip) and quickly installed, which reduces the doctor's operating difficulty and improves the operating stability and reliability of the injection needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The above and other objects, features and advantages of the present disclosure will become more apparent through a more detailed description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present disclosure.

[0041] Figure 1 This is an overall view of the injection needle tip provided by an embodiment of the present invention.

[0042] Figure 2 An exploded view of the injection needle tip provided by an embodiment of the present invention.

[0043] Figure 3 A schematic diagram of a buckle on a quick-release structure provided in an embodiment of the present invention.

[0044] Figure 4A schematic diagram of the lower buckle of the quick-release structure provided in an embodiment of the present invention.

[0045] Figure 5 A schematic diagram of a quick disassembly process provided by an embodiment of the present invention.

[0046] Figure 6 This is a schematic diagram of the internal structure of an injection needle provided in an embodiment of the present invention.

[0047] Reference numerals:

[0048] 1-injection needle; 2-Luer connector, 3-adapter tube, 4-injection hole, 5-quick release upper buckle assembly, 6-quick release lower buckle assembly, 7-adapter disc, 8-counting chip, 9-through hole, 10-quick release pressure hole, 11-convex cone surface, 12-lower buckle support, 13-ball head plunger, 14-concave cone surface, 15-ball head, 16-spring, 17-long catheter, 18-sleeve, 19-fiber Bragg grating. DETAILED DESCRIPTION

[0049] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0050] As used herein, the term "including" and its variations mean open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "based at least in part on". The terms "an example embodiment" and "an embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc. may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0051] See also Figure 1-Figure 6 The embodiment of the present invention provides an injection needle end, including: an injection connection assembly, a detachable assembly and an injection needle end body. The injection connection assembly is used to connect with the injection needle 1; the detachable assembly includes a quick-release upper buckle assembly 5 and a quick-release lower buckle assembly 6, the quick-release upper buckle assembly 5 is connected to the injection connection assembly; the injection needle end body is connected to the quick-release lower buckle assembly 6;

[0052] Among them, the position state between the quick-release upper buckle assembly 5 and the quick-release lower buckle assembly 6 includes a first position state and a second position state. In the first position state, the quick-release upper buckle assembly 5 is connected to the quick-release lower buckle assembly 6, and then connected to the injection needle terminal body. In the second position state, the quick-release upper buckle assembly 5 and the quick-release lower buckle assembly 6 are separated from each other, thereby releasing the injection needle terminal body.

[0053] The injection needle tip provided by the embodiment of the present invention will be further explained and described below through optional embodiments.

[0054] In an optional embodiment, the injection connection assembly includes: a Luer connector 2 and an adapter tube 3; one end of the Luer connector 2 is used to connect to the injection needle, and the other end is connected to the adapter tube 3; the adapter tube 3 is connected to the quick-release upper buckle assembly; wherein, an injection hole 4 is provided on the adapter tube 3, and the injection hole 4 is used to connect to the injection pump.

[0055] In an optional embodiment, the diameter of the Luer connector 2 is smaller than the diameter of the Luer connector 2; the Luer connector 2 and the adapter tube 3 are integrally formed.

[0056] In an optional embodiment, the outer wall of the adapter tube 3 is provided with an internal thread, the quick-release upper buckle assembly is provided with an external thread, and the adapter tubes 3 are threadedly connected to each other.

[0057] In an optional embodiment, a counting chip 8 is further included, and the counting chip 8 is arranged between the injection connection component and the detachable component; the counting chip 8 is used to complete the encrypted communication between the injection needle end and the surgical robot.

[0058] The quick-release buckle assembly 6 is used to connect with the surgical robot. The counting chip 8 is used to complete encrypted communication with the robot and count the number of times the end of the injection needle is used.

[0059] In an optional embodiment, the quick-release upper buckle assembly 5 includes: an upper buckle body, a first end face of the upper buckle body is connected to the injection connection assembly, a convex conical surface 11 is opened on the second end face along the circumferential direction, and a quick-release pressing hole 10 is provided on at least one side of the convex conical surface 11. The upper buckle body switches between the first position state and the second position state with the quick-release lower buckle assembly 6 through the convex conical surface 11 and the quick-release pressing hole 10.

[0060] In an optional embodiment, the quick-release lower buckle assembly 6 includes: a lower buckle support 12, a ball plunger 13 and a concave cone surface 14; the lower buckle support 12 is connected to the injection needle terminal body; the concave cone surface 14 is evenly arranged along the lower buckle support 12; the ball plunger 13 is arranged on the concave cone surface 14, and the concave cone surface 14 is in contact with the convex cone surface 11, and the quick-release pressure hole 10 squeezes the ball plunger 13 or moves away from the ball plunger 13 to realize switching between the first position state and the second position state with the quick-release lower buckle assembly 6.

[0061] In an optional embodiment, the ball head plunger 13 includes a plunger, a ball head 15 and an elastic connector (a spring 16 described below in the present invention); a connecting hole is opened on the plunger, the elastic connector is arranged at the bottom of the plunger, and the ball head 15 is connected to the elastic connector through the connecting hole; when the quick-release pressure hole 10 squeezes the ball head 15, the quick-release upper buckle assembly 5 and the quick-release lower buckle assembly 6 are located in a first position state, thereby connecting the injection needle terminal body; when the quick-release pressure hole 10 is away from the ball head 15, the quick-release upper buckle assembly 5 and the quick-release lower buckle assembly 6 are located in a second position state, thereby releasing the injection needle terminal body.

[0062] The quick-release function of the injection needle end is realized by the quick-release upper buckle assembly 5 and the quick-release lower buckle assembly 6. The scenario during use is as follows: the user aligns the quick-release upper buckle assembly 5 and the quick-release lower buckle assembly 6, and presses the quick-release lower buckle assembly 6 with the quick-release upper buckle assembly 5 until the ball head 15 is squeezed into the quick-release pressure hole 10. At this time, let go, the quick-release upper buckle assembly 5 and the quick-release lower buckle assembly 6 will not be detached, and the injection needle end is completely installed on the robot. When disassembling, hold the quick-release upper buckle assembly 5, and pull the steel ball of the ball head 15 out of the quick-release pressure hole 10. At this time, the quick-release upper buckle assembly 5 and the quick-release lower buckle assembly 6 are detached, and the disassembly is completed.

[0063] The detailed design of the quick-release buckle assembly 5 is as follows: Figure 3 As shown, a through hole 15 is provided at the center of the upper buckle body, and the through hole 15 is used for installing the motor output shaft. Figure 4 As shown, there can be four ball plungers 13, and the four ball plungers 13 are evenly arranged at 90 degrees. The convex conical surface 11 contacts the concave conical surface 14, which plays the role of centering and guiding disassembly.

[0064] The working process of the ball plunger 13 is as follows Figure 5 As shown, one side of the spring 16 (elastic connector) is connected to the bottom of the ball plunger 13, and the other side is connected to the ball head 15. When connected, the working process is as follows Figure 5 As shown in the first figure, the quick release pressure hole 10 moves in the direction of the arrow, squeezing the ball head 15 and the spring 16. The movement direction of the ball head 15 and the spring 16 is shown by the arrow. When the quick release pressure hole 10 is in full contact with the ball head 15 ( Figure 5 As shown in the second figure in the figure, the spring 16 is still in a compressed state, and the spring 16 will support the ball head 15 to prevent the quick-release pressure hole 10 from sliding out, thereby playing the role of connecting the injection needle end body.

[0065] When removing the needle tip body, the working process is as follows Figure 5As shown in the third figure in FIG. The quick release pressure hole 10 moves along the arrow, squeezing the ball head 15 and the spring 16. After the quick release pressure hole 10 is completely removed, the ball head 15 and the spring 16 are released from the compressed state and move along the arrow direction. After the ball head 15 and the spring 16 are reset, the injection needle end body has been completely removed.

[0066] On the other hand, an injection needle 1 is provided, comprising any one of the above injection needle ends and an injection needle 1 connected to the injection needle end, and a fiber Bragg grating 19 connected to the outer side of the injection needle 1 .

[0067] The fiber Bragg grating 19 is distributed as follows Figure 6 As shown. There can be three fiber Bragg gratings 19, and the three fiber Bragg gratings 19 can be evenly arranged at 120 degrees on the periphery of the injection needle. The fiber Bragg grating 19 is connected to the injection needle 1 by gluing, and is used to measure the contact force between the injection needle 1 and the retina.

[0068] In an optional embodiment, the injection needle 1 includes: a long catheter 17, a sleeve 18 and a fiber Bragg grating 19; the long catheter 17 is connected to the injection connection assembly; the fiber Bragg grating 19 is arranged along the circumference of the long catheter 17; and the sleeve 18 is sleeved on the fiber Bragg grating 19.

[0069] The inside of the injection needle Figure 6 As shown. Among them, there can be 3 FBGs (fiber Bragg gratings 19), and the 3 FBGs are evenly arranged at 120° around the circumference of the long catheter. The long catheter 17, the sleeve 18 and the fiber Bragg grating 19 are all connected by gluing. The material of the long catheter 17 can be stainless steel or polyetheretherketone, and the specifications can be 41G, 47G and 48G for fluid flow. FBG is used to measure the contact force between the injection needle and the retina, and the sleeve 18 is used to wrap the FBG to reduce friction.

[0070] For example, when in use, the side opening of the adapter tube 3 is connected to the injection pump through a hose. After the thrombolytic drug or stem cell flows out of the injection pump, it enters the adapter tube 3 through the side opening of the adapter tube 3, and then flows into the injection needle 1 through the Luer connector 2, and then flows out of the injection needle 1 and enters the eye tissue.

[0071] The embodiment of the present invention is different from the prior art that the end effector and the robot are connected by bolts and the like, and the disassembly process is cumbersome. The present invention facilitates the rapid installation and disassembly of the injection needle end body through the quick-release upper buckle assembly 5 and the quick-release lower buckle assembly 6, reducing the difficulty of the doctor's operation.

[0072] In the prior art, the motor for controlling the opening and closing of the tweezers must be removed or installed together with the actuator, and the driver and controller supporting the motor must also be removed or installed together, making the system too complicated and unreliable.

[0073] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An injection needle tip, characterized in that: include: An injection connection assembly, used for connecting with an injection needle; A detachable assembly, comprising a quick-release upper buckle assembly and a quick-release lower buckle assembly, wherein the quick-release upper buckle assembly is connected to the injection connection assembly; The injection needle end body is connected to the quick-release buckle assembly; The position state between the quick-release upper buckle assembly and the quick-release lower buckle assembly includes a first position state and a second position state. In the first position state, the quick-release upper buckle assembly is connected to the quick-release lower buckle assembly, thereby connecting the injection needle end body. In the second position state, the quick-release upper buckle assembly is separated from the quick-release lower buckle assembly, thereby releasing the injection needle end body. The quick-release upper buckle assembly comprises: an upper buckle body, The first end surface of the upper buckle body is connected to the injection connection assembly, and a convex conical surface is provided on the second end surface along the circumferential direction, and at least one side surface of the convex conical surface is provided with a quick-release pressing hole, and the upper buckle body switches between the first position state and the second position state with the quick-release lower buckle assembly through the convex conical surface and the quick-release pressing hole; The quick-release lower buckle assembly comprises: a lower buckle support, a ball plunger and a concave cone surface; The lower buckle support is connected to the injection needle terminal body; The concave cone surface is evenly arranged along the lower buckle support; The ball plunger is arranged on the concave conical surface, and the concave conical surface is in contact with the convex conical surface, and the quick-release pressure hole squeezes the ball plunger or moves away from the ball plunger to achieve switching between the first position state and the second position state with the quick-release lower buckle assembly; The ball plunger comprises a plunger, a ball head and an elastic connecting piece; The plunger is provided with a connecting hole, the elastic connecting piece is arranged at the bottom of the plunger, and the ball head is connected to the elastic connecting piece through the connecting hole; When the quick-release pressure hole squeezes the ball head, the quick-release upper buckle assembly and the quick-release lower buckle assembly are located in the first position state, thereby connecting the injection needle end body; When the quick-release pressure hole is away from the ball head, the quick-release upper buckle assembly and the quick-release lower buckle assembly are located in the second position state, thereby releasing the injection needle terminal body.

2. The injection needle tip according to claim 1, characterized in that: The injection connection assembly includes: a Luer connector and an adapter tube; One end of the Luer connector is used to connect with the injection needle, and the other end is connected with the adapter tube; The adapter tube is connected to the quick-release upper buckle assembly; Wherein, the adapter tube is provided with a liquid injection hole, and the liquid injection hole is used to connect with the injection pump.

3. The injection needle tip according to claim 2, characterized in that: The diameter of the Luer connector is smaller than the diameter of the Luer connector; The Luer connector and the adapter tube are integrally formed.

4. The injection needle tip according to claim 1, characterized in that: It also includes a counting chip, which is arranged between the injection connection component and the detachable component; The counting chip is used to complete the encrypted communication between the injection needle tip and the surgical robot.

5. An injection needle, characterized in that: The invention comprises the injection needle end according to any one of claims 1 to 4, an injection needle connected to the injection needle end, and a fiber Bragg grating connected to the outer side of the injection needle.

6. The injection needle according to claim 5, characterized in that: The injection needle comprises: a long catheter, a sleeve and a fiber Bragg grating; The long catheter is connected to the injection connection assembly; The fiber Bragg grating is arranged along the circumference of the long conduit; The sleeve is sleeved on the fiber Bragg grating.

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