Urethral syringe attachment device
By designing a locking structure and locking mechanism for the urethral syringe connection device, the problem of inconvenient operation of existing devices was solved, enabling flexible injection of the syringe into different areas of the urethra and simplifying the operation process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHENGDU QIPU BIOTECHNOLOGY CO LTD
- Filing Date
- 2025-09-12
- Publication Date
- 2026-07-31
AI Technical Summary
Existing urethral syringe connection devices are inconvenient to operate when injecting into different areas of the urethra, especially since the entire device needs to be rotated, which complicates the operation.
A urethral syringe connection device was designed. Through the locking structure of the first connecting body and the second connecting body, the syringe can rotate relative to each other along the axial direction. The injection needle can inject into different areas around the urethra, while the endoscope and other components remain stationary. A locking mechanism is used to restrict the rotation.
It enables flexible operation of the syringe, allowing for convenient injection into different areas of the urethra, simplifying the operation process and improving ease of use.
Smart Images
Figure CN224573082U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of urethral injection equipment technology, and more specifically, to a urethral syringe connection device. Background Technology
[0002] Stress urinary incontinence refers to involuntary leakage of urine when abdominal pressure increases, such as during sneezing, coughing, laughing, exercise, or physical activity. This is due to weakness in the muscles supporting the urethra and the pelvic floor muscles, or the urethral sphincter controlling the urethra. When intra-abdominal pressure suddenly increases, these muscles are unable to control urine, resulting in leakage. Currently, a new treatment method for stress urinary incontinence has emerged: injecting a filler into the urethral wall using a syringe. This allows the sphincter and other tissues to maintain a tight state for an extended period, thereby improving stress urinary incontinence. When injecting the filler with a syringe, an endoscope is usually attached for imaging observation. The endoscope and syringe are combined using a urethral syringe connector. The syringe is usually located on one side of the endoscope. This setup requires rotating the entire device to inject into different areas around the urethra, and the urethral syringe connector often has other auxiliary components attached, which can make operation inconvenient. Utility Model Content
[0003] This application provides a urethral syringe connection device that enables syringe rotation, thereby allowing injection into different areas of the urethra for convenient operation.
[0004] This application is implemented as follows: This application provides a urethral syringe connection device, comprising: A first connecting body has a proximal end and a distal end, and is provided with a first mounting channel penetrating the proximal end and the distal end; the proximal end of the first connecting body is used to mount an endoscope, and the first mounting channel is used to accommodate the endoscope; a first mounting component is provided on the outer wall of the first connecting body; and The second connecting body has a first end and a second end, and has a main mounting channel that passes through the first end and the second end. The main mounting channel is used to install the first connecting body. The second connecting body is provided with a second mounting channel for installing a syringe. The second mounting channel is used to accommodate an injection needle. The inner wall of the second connecting body is provided with a second mounting component. The first mounting component and the second mounting component can be engaged and rotate relative to each other along the axial direction.
[0005] In one possible implementation, the first mounting component includes a first protrusion circumferentially disposed along the outer wall of the first connecting body, and the second mounting component includes a second protrusion circumferentially disposed along the inner wall of the main mounting channel, the second protrusion being able to pass over the first protrusion and such that the second protrusion is restricted to move toward the second end, and the first protrusion is restricted to move toward the first end to restrict the second connecting body from disengaging from the main mounting channel.
[0006] In one possible implementation, the first protrusion is an annular protrusion ring, and the second protrusion is an annular protrusion ring or a plurality of spaced protrusions.
[0007] In one possible implementation, the outer periphery of the protruding ring is arc-shaped, and the outer surface of the protrusion is an arc surface.
[0008] In one possible implementation, the outer wall of the first connecting body is provided with a first abutting portion, and the inner wall of the second connecting body is provided with a second abutting portion. The first abutting portion and the second abutting portion can abut against each other, thereby restricting the first connecting body from moving toward the second end and restricting the second connecting body from moving toward the first end.
[0009] In one possible implementation, the outer wall of the first connecting body has a first step to form the first abutting portion, the first abutting portion including a first segment near the distal end and a second segment near the proximal end, the outer diameter of the first segment being smaller than the outer diameter of the second segment; the inner wall of the second connecting body has a second step to form a second abutting portion, the second abutting portion including a third segment near the second end and a fourth segment near the first end, the inner diameter of the third segment being smaller than the inner diameter of the fourth segment; the first step and the second step are capable of abutting against each other.
[0010] In one possible implementation, the second mounting channel includes a first channel disposed along the length of the second connecting body and a second channel disposed at an acute angle to the first channel, the opening of the second channel being close to the first end.
[0011] In one possible implementation, the urethral syringe connection device further includes a locking mechanism configured to restrict relative rotation between the first connection body and the second connection body.
[0012] In one possible implementation, the locking mechanism includes a retaining ring sleeved on the outer wall of the first connecting body, the retaining ring being disposed on one side of the first end of the second connecting body; the retaining ring is slidably connected to the first connecting body and is capable of moving along the length direction of the first connecting body, the retaining ring being capable of connecting to the first end of the second connecting body to restrict the relative rotation of the first connecting body and the second connecting body.
[0013] In one possible implementation, the end face of the first end is provided with a plurality of positioning holes, and the side of the retaining ring facing the first end is provided with a positioning post, which can be inserted into the positioning hole.
[0014] In one possible implementation, the outer wall of the first connecting body is provided with a groove, the groove being arranged along the length direction of the first connecting body, and the inner wall of the retaining ring is provided with a slider that can slide and engage with the groove, the slider being able to slide along the groove.
[0015] In one possible implementation, the outer surface of the retaining ring is provided with anti-slip texture.
[0016] In one possible implementation, a transparent lens is mounted on the distal side of the first mounting channel.
[0017] In one possible implementation, the first connecting body is provided with an injection channel and a drainage channel extending through the distal end. The injection channel and the drainage channel are not interconnected. The injection channel is used to connect to an injection device, and the drainage channel is used to connect to a drainage device.
[0018] The embodiments of this application have at least the following beneficial effects: The urethral syringe connecting device of this application connects the first connecting body through the main mounting channel of the second connecting body, and the two are connected by the engagement of a first mounting component on the outer wall of the first connecting body and a second mounting component on the inner wall of the second connecting body. Since the first and second mounting components can rotate relative to each other axially, the syringe is fixed in the second mounting channel, and the needle tip can protrude from one end of the second mounting channel. By rotating the second connecting body relative to the first connecting body, the syringe can inject into different areas of the urethra, while the first connecting body remains relatively stationary, and the endoscope and other components connected to the first connecting body also remain relatively stationary, making operation more convenient. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the urethral syringe connection device according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the first connecting body in an embodiment of this application; Figure 3 for Figure 2 Enlarged view of region A in the middle; Figure 4 This is a cross-sectional view of the retaining ring according to an embodiment of this application; Figure 5 This is a schematic diagram of the structure of the second connecting body according to an embodiment of this application; Figure 6 for Figure 5 Enlarged view of region B in the image; Figure 7 This is a cross-sectional view of the second connecting body according to an embodiment of this application; Figure 8 This is a cross-sectional view of the first connecting body according to an embodiment of this application; Figure 9 This is a cross-sectional view of the second connecting body according to an embodiment of this application; Figure 10 This is a schematic diagram of another state of the urethral syringe connection device according to an embodiment of this application.
[0021] Icons: 10-Urethra syringe connecting device; 11-First connecting body; 111-Proximal end; 112-Distal end; 113-First mounting channel; 114-First mounting component; 1141-Protruding ring; 115-First supporting part; 1151-First section; 1152-Second section; 116-Slide groove; 117-Injection channel; 118-Drainage channel; 12-Second connecting body; 121-First end; 1211-Positioning hole; 122-Second end; 123 - Main mounting channel; 124- Second mounting channel; 1241- First channel; 1242- Second channel; 125- Second mounting component; 1251- Protrusion; 126- Second supporting part; 1261- Third section; 1262- Fourth section; 13- Locking mechanism; 131- Snap ring; 1311- Positioning post; 1312- Slider; 21- Endoscope; 22- Syringe; 221- Injection needle; 222- Injection cartridge; 31- Injection pipe; 32- Drainage pipe. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0023] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0024] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," and "fourth," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0025] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Example
[0026] This embodiment provides a urethral syringe connection device 10. Please refer to... Figures 1-5 It includes a first connecting body 11 and a second connecting body 12.
[0027] The first connecting body 11 has a proximal end 111 and a distal end 112, and is provided with a first mounting channel 113 that passes through the proximal end 111 and the distal end 112. It should be noted that the proximal end 111 refers to the end closer to the operator, and the distal end 112 refers to the end farther from the operator. The proximal end 111 of the first connecting body 11 is used to mount an endoscope 21, and the first mounting channel 113 is used to accommodate the endoscope 21. The barrel of the endoscope 21 can be inserted into the first mounting channel 113. The body of the endoscope 21 can be connected to the first connecting body 11 by a snap-fit connection or by a threaded connection; this application does not specifically limit the connection.
[0028] Optionally, a transparent lens is installed on one side of the first mounting channel 113 at the distal end 112. The transparent lens is sealed to the inner wall of the first mounting channel 113. For example, the transparent lens can be sealed and bonded to the inner wall of the first mounting channel 113 with sealant. The transparent lens can be a glass lens or a resin lens. When the barrel of the endoscope 21 is located within the first mounting channel 113, the endoscope 21 can also observe the condition inside the urethra because the transparent lens is transparent. Since the transparent lens is sealed to the inner wall of the first mounting channel 113, it can prevent dirt from the urethra from entering the first mounting channel 113 and contaminating the endoscope 21.
[0029] In addition, the first connecting body 11 is also provided with an injection channel 117 and a drainage channel 118 that extend through the distal end 112 (see reference). Figure 8 The injection channel 117 and the drainage channel 118 are not interconnected. The injection channel 117 is used to connect to the injection device via the injection pipe 31, and the drainage channel 118 is used to connect to the drainage device via the drainage pipe 32. Fluid can be introduced into the injection channel 117 through the injection device. The flushing fluid is discharged from the distal end 112 of the first connecting body 11 into the urethra for flushing, and then the turbid fluid is discharged through the drainage channel 118 via the drainage device.
[0030] Reference Figures 5-7The second connecting body 12 has a first end 121 and a second end 122, and a main mounting channel 123 passing through the first end 121 and the second end 122. The main mounting channel 123 is used to mount the first connecting body 11. The second connecting body 12 is provided with a second mounting channel 124 for mounting a syringe 22. The second mounting channel 124 is used to set an injection needle 221, and the tip of the injection needle 221 can protrude from one end of the second mounting channel 124. The injection needle 221 is mounted on the syringe 22. The syringe 22 enters the second mounting channel 124 from the end near the first end 121 and is fixed at the port of the second mounting channel 124. The injection needle 221 passes through the second mounting channel 124 and exits from the second end 122. Optionally, the injection needle 221 includes a needle tip and a connecting tube. The needle tip is mounted on one end of the connecting tube, and the other end of the mounting tube is connected to the syringe via a connecting connector. For example, the connecting tube is a polyethylene tube. The connecting tube can be bent within the second mounting channel 124 to adapt to the shape of the second mounting channel 124. Among them, the injection needle 221 can also be a metal needle.
[0031] Exemplarily, the second mounting channel 124 includes a first channel 1241 disposed along the length of the second connecting body 12 and a second channel 1242 disposed at an acute angle to the central axis of the first channel 1241, with the opening of the second channel 1242 close to the first end 121. The second connecting body 12 includes a main body and a branch member. The first channel 1241 is located on the main body, and the second channel 1242 is disposed on the branch member, which protrudes from the main body. The inner wall of the second channel 1242 provides support for the syringe 222, facilitating the injection of filler. Since the central axis of the second channel 1242 is at an acute angle to the central axis of the first channel 1241, the syringe 222 will not interfere with the endoscope 21 after it is installed on the first connecting body 11.
[0032] The inner wall of the second connecting body 12 is provided with a second mounting component 125, and the outer wall of the first connecting body 11 is provided with a first mounting component 114. The first mounting component 114 and the second mounting component 125 can be engaged and rotate relative to each other along the axial direction.
[0033] The urethral syringe connecting device 10 of this application connects the first connecting body 11 through the main mounting channel 123 of the second connecting body 12, with the first mounting component 114 on the outer wall of the first connecting body 11 and the second mounting component 125 on the inner wall of the second connecting body 12 engaging. Since the first mounting component 114 and the second mounting component 125 can rotate relative to each other axially, the syringe 22 is fixed in the second mounting channel 124, with the needle tip of the injection needle 221 protruding from one end of the second mounting channel 124. By rotating the branch of the second connecting body 12 relative to the first connecting body 11, the injection needle 221 can inject into different areas of the urethra circumferentially, while the first connecting body 11 remains relatively stationary. The endoscope 21 and other components connected to the first connecting body 11 can also remain relatively stationary, making operation more convenient.
[0034] In one embodiment, the first mounting component 114 includes a first protrusion disposed circumferentially along the outer wall of the first connecting body 11, and the second mounting component 125 includes a second protrusion disposed circumferentially along the inner wall of the main mounting channel 123. The second protrusion is able to pass over the first protrusion and is restricted to move toward the second end 122, while the first protrusion is restricted to move toward the first end 121 to restrict the second connecting body 12 from disengaging from the main mounting channel 123.
[0035] In one embodiment, the first protrusion is an annular protrusion ring 1141, and the second protrusion is a plurality of spaced protrusions 1251. Exemplarily, the outer periphery of the protrusion ring 1141 is arc-shaped, and the outer surface of the protrusions 1251 is an arc surface. The protrusions 1251 can pass over the protrusion ring 1141 and are restricted to move toward the second end 122, while the protrusion ring 1141 is restricted to move toward the first end 121, thereby preventing the first connecting body 11 from disengaging from the main mounting channel 123.
[0036] In this design, the protrusion 1251, with its outer arc-shaped surface, and the raised ring 1141, with its outer arc-shaped periphery, engage with each other, allowing the protrusion 1251 to smoothly pass over the raised ring 1141. After the protrusion 1251 passes the raised ring 1141, it pulls the first connecting body 11 and the second connecting body 12 in the opposite direction. The protrusion 1251 is restricted from moving towards the second end 122 by the raised ring 1141, and the raised ring 1141 is restricted from moving towards the first end 121 by the protrusion 1251, thus making the connection between the first connecting body 11 and the second connecting body 12 more stable. Furthermore, after the protrusion 1251 passes the raised ring 1141, during the relative rotation of the first connecting body 11 and the second connecting body 12, the raised ring 1141 contacts the outer wall of the second connecting body 12 and maintains mutual sliding, thus making the first connecting body 11 more stable relative to the second connecting body 12 during relative rotation.
[0037] It should be noted that in other embodiments, the outer wall of the first connecting body 11 may be provided with a plurality of protrusions 1251 spaced apart, and the inner wall of the main mounting channel 123 of the second connecting body 12 may be provided with an annular protrusion ring 1141; or the outer wall of the first connecting body 11 and the inner wall of the main mounting channel 123 of the second connecting body 12 may both be provided with a protrusion ring 1141.
[0038] Furthermore, the outer wall of the first connecting body 11 is provided with a first abutment portion 115 (see reference). Figure 2 The inner wall of the second connecting body 12 has a second abutment portion 126 (see reference). Figure 5 The first abutting part 115 and the second abutting part 126 can abut against each other, thereby restricting the first connecting body 11 from moving toward the second end 122 and restricting the second connecting body 12 from moving toward the first end 121 (see reference). Figure 1 ).
[0039] The first connecting body 11 is restricted from moving toward the second end 122 by the second abutment 126, and is also restricted from moving toward the first end 121 by the second protrusion of the second mounting member 125; the second connecting body 12 is restricted from moving toward the first end 121 by the first abutment 115, and is also restricted from moving toward the second end 122 by the first protrusion of the first mounting member 114. This makes the connection between the first connecting body 11 and the second connecting body 12 more stable.
[0040] For example, the outer wall of the first connecting body 11 has a first step to form a first abutting portion 115. The first abutting portion 115 includes a first segment 1151 near the distal end 112 and a second segment 1152 near the proximal end 111. The outer diameter of the first segment 1151 is smaller than the outer diameter of the second segment 1152. The inner wall of the second connecting body 12 has a second step to form a second abutting portion 126. The second abutting portion 126 includes a third segment 1261 near the second end 122 and a fourth segment 1262 near the first end 121. The inner diameter of the third segment 1261 is smaller than the inner diameter of the fourth segment 1262. The first step and the second step can abut against each other. Through the mutual abutment between the first step and the second step, the movement of the second connecting body 12 towards the first end 121 and the movement of the first connecting body 11 towards the second end 122 can be restricted. The outer diameter of the first segment 1151 is smaller than the inner diameter of the third segment 1261, and the outer diameter of the second segment 1152 is smaller than the outer diameter of the fourth segment 1262, so that the first segment 1151 can be inserted into the third segment 1261 and the second segment 1152 can be inserted into the fourth segment 1262.
[0041] Reference Figure 3 and Figure 4Furthermore, the urethral syringe connection device 10 also includes a locking mechanism 13, which is configured to restrict the relative rotation of the first connecting body 11 and the second connecting body 12. When the first connecting body 11 is rotated relative to the second connecting body 12, the injection needle 221 injects into different areas around the urethra. When the first connecting body 11 rotates to the target position, the locking mechanism 13 can restrict the rotation of the second connecting body 12 relative to the first connecting body 11, thereby fixing the injection needle 221 in the preset area.
[0042] In one possible implementation, the locking mechanism 13 includes a retaining ring 131 sleeved on the outer wall of the first connecting body 11, and the retaining ring 131 is disposed on one side of the first end 121 of the second connecting body 12. The retaining ring 131 is slidably connected to the first connecting body 11 and can move along the length direction of the first connecting body 11, and the retaining ring 131 can be connected to the first end 121 of the second connecting body 12 to restrict the relative rotation of the first connecting body 11 and the second connecting body 12. When the retaining ring 131 is on one side of the first end 121 of the second connecting body 12, the second connecting body 12 can rotate relative to the first connecting body 11 (see reference). Figure 10 When it is necessary to restrict the rotation of the second connecting body 12 relative to the first connecting body 11, the sliding retaining ring 131 is moved to the first end 121 of the second connecting body 12, and the retaining ring 131 is kept connected to the end face of the first end 121, thereby fixing the second connecting body 12 relatively (see reference). Figure 1 When the second connecting body 12 needs to be rotated again, the sliding retaining ring 131 moves toward the end away from the first end 121 of the second connecting body 12, thereby causing the retaining ring 131 to disengage from the first end 121 of the second connecting body 12, and the second connecting body 12 can rotate relative to the first connecting body 11.
[0043] For example, the outer wall of the first connecting body 11 is provided with a groove 116, which is arranged along the length direction of the first connecting body 11. The inner wall of the retaining ring 131 is provided with a slider 1312 that can slide and engage with the groove 116. The slider 1312 can slide along the groove 116. By slidably engaging the slider 1312 of the retaining ring 131 with the groove 116, the retaining ring 131 can slide relatively smoothly.
[0044] In addition, in order to better fix the retaining ring 131 to the first end 121, for example, the end face of the first end 121 is provided with a plurality of positioning holes 1211 (refer to...). Figure 9The retaining ring 131 has a positioning post 1311 on its side facing the first end 121, which can be inserted into the positioning hole 1211. By inserting the positioning post 1311 into the positioning hole 1211, the retaining ring 131 can be connected to the second connecting body 12, thereby fixing the first connecting body 11 and the second connecting body 12 relative to each other. This prevents the second connecting body 12 from rotating relative to the first connecting body 11. Furthermore, the outer surface of the retaining ring 131 has anti-slip textures, making it easier to operate when sliding the retaining ring 131 along the extension direction of the groove 116.
[0045] For example, the positioning hole 1211 is a circular hole, and the positioning post 1311 is also a cylinder. The lines connecting the center of two adjacent positioning holes 1211 to the axis of the first connecting body 11 are respectively the first connecting line and the second connecting line, and the included angle between the first connecting line and the second connecting line is 5~30°, for example, 10°, 12°, 15°, 18°, 20°, 24° or 30°. By inserting the positioning post 1311 into different positioning holes 1211, the syringe can be positioned in different areas in different circumferential directions.
[0046] In summary, the urethral syringe connecting device 10 of this application connects the first connecting body 11 by passing it through the main mounting channel 123 of the second connecting body 12, and by engaging the first mounting component 114 on the outer wall of the first connecting body 11 and the second mounting component 125 on the inner wall of the second connecting body 12. Since the first mounting component 114 and the second mounting component 125 can rotate relative to each other axially, the syringe 22 is fixed in the second mounting channel 124, with the needle tip of the injection needle 221 protruding from one end of the second mounting channel 124. By rotating the second connecting body 12 relative to the first connecting body 11, the injection needle 221 can inject into different areas of the urethra while the first connecting body 11 remains relatively stationary. The endoscope 21 and other components connected to the first connecting body 11 can also remain relatively stationary, making operation more convenient. Furthermore, the locking mechanism 13 restricts the rotation of the second connecting body 12 relative to the first connecting body 11, thereby fixing the injection needle 221 in a preset area.
[0047] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A urethral syringe attachment device, characterized in that, include: A first connecting body has a proximal end and a distal end, and is provided with a first mounting channel that passes through the proximal end and the distal end; The proximal end of the first connecting body is used to install an endoscope, and the first mounting channel is used to accommodate the endoscope; the outer wall of the first connecting body is provided with a first mounting component; as well as The second connecting body has a first end and a second end, and has a main mounting channel that passes through the first end and the second end. The main mounting channel is used to install the first connecting body. The second connecting body is provided with a second mounting channel for installing a syringe. The second mounting channel is used to accommodate an injection needle, and the tip of the injection needle can protrude from one end of the second mounting channel. The inner wall of the second connecting body is provided with a second mounting component. The first mounting component and the second mounting component can engage and rotate relative to each other along the axial direction.
2. The urethral syringe coupling device of claim 1, wherein, The first mounting component includes a first protrusion arranged circumferentially along the outer wall of the first connecting body, and the second mounting component includes a second protrusion arranged circumferentially along the inner wall of the main mounting channel. The second protrusion is able to pass over the first protrusion and restrict the movement of the second protrusion toward the second end. The first protrusion is restricted to move toward the first end to restrict the second connecting body from disengaging from the main mounting channel.
3. The urethral syringe coupling device of claim 2, wherein, The first protrusion is an annular protrusion ring, and the second protrusion is an annular protrusion ring or a plurality of spaced protrusions; optionally, the outer periphery of the protrusion ring is arc-shaped, and the outer surface of the protrusion is an arc surface.
4. The urethral syringe coupling device of claim 2, wherein, The outer wall of the first connecting body is provided with a first abutting part, and the inner wall of the second connecting body is provided with a second abutting part. The first abutting part and the second abutting part can abut against each other and restrict the first connecting body from moving toward the second end, and restrict the second connecting body from moving toward the first end.
5. The urethral syringe coupling device of claim 4, wherein, The outer wall of the first connecting body has a first step to form the first abutting portion, the first abutting portion including a first segment near the distal end and a second segment near the proximal end, the outer diameter of the first segment being smaller than the outer diameter of the second segment; the inner wall of the second connecting body has a second step to form a second abutting portion, the second abutting portion including a third segment near the second end and a fourth segment near the first end, the inner diameter of the third segment being smaller than the inner diameter of the fourth segment; the first step and the second step are capable of abutting against each other.
6. The urethral syringe coupling device according to any one of claims 1 to 5, wherein, The second installation channel includes a first channel disposed along the length of the second connecting body and a second channel disposed at an acute angle to the first channel, wherein the opening of the second channel is close to the first end.
7. The urethral syringe coupling device according to any one of claims 1 to 5, wherein, The urethral syringe connection device further includes a locking mechanism configured to restrict relative rotation between the first connection body and the second connection body.
8. The urethral syringe coupling device of claim 7, wherein, The locking mechanism includes a retaining ring sleeved on the outer wall of the first connecting body, and the retaining ring is located on one side of the first end of the second connecting body; the retaining ring is slidably connected to the first connecting body and can move along the length direction of the first connecting body, and the retaining ring can be connected to the first end of the second connecting body to restrict the relative rotation of the first connecting body and the second connecting body.
9. The urethral syringe coupling device of claim 8, wherein, The end face of the first end is provided with a plurality of positioning holes, and the side of the retaining ring facing the first end is provided with a positioning post, which can be inserted into the positioning hole.
10. The urethral syringe coupling device of claim 8, wherein, The outer wall of the first connecting body is provided with a sliding groove, which is arranged along the length direction of the first connecting body. The inner wall of the retaining ring is provided with a slider that can slide and engage with the sliding groove, and the slider can slide along the sliding groove.