Endoscope connection apparatus
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2026-04-02
- Publication Date
- 2026-08-13
Smart Images
Figure CN2026088145_13082026_PF_FP_ABST
Abstract
Description
An endoscope connection device Technical Field
[0001] This application relates to the field of medical device technology, specifically to an endoscope connection device. Background Technology
[0002] An endoscope typically consists of two parts: a handle and an imaging catheter connected to the handle. After the imaging catheter enters the body's natural cavities, it takes pictures or videos. Once the imaging catheter detects a lesion, a snare is used to reach the target lesion through the instrument channel on the imaging catheter. Then, a polyp removal procedure is performed. After the polyp is removed, the snare is withdrawn from the endoscope handle.
[0003] Cholangioscopy is used to diagnose and treat diseases occurring within the bile duct. The bile duct is long and narrow, and ordinary endoscopes, such as duodenoscopes, have imaging catheters with a diameter close to 2 cm, which are clearly unsuitable for directly treating lesions in the bile duct. Cholangioscopy, like the aforementioned snare, is a minimally invasive surgical consumable instrument. The imaging catheter of the cholangioscopy is inserted into the forceps port of the endoscope (usually a duodenoscope), and then further into the bile duct through the imaging catheter of the duodenoscope (the diameter of the cholangioscopy imaging catheter is generally less than 3 mm) to perform stone removal or biopsy sampling.
[0004] As can be seen from the above, the choledochoscope, as a daughter endoscope of the duodenoscope (also known as the mother endoscope), is used in conjunction with the duodenoscope and is not used independently. During the operation, the surgeon needs to hold both the daughter endoscope and the mother endoscope simultaneously. Once the mother endoscope reaches the vicinity of the bile duct, it cannot be moved arbitrarily. Therefore, it is necessary to maintain the relative fixation between the daughter endoscope and the mother endoscope during the operation.
[0005] The conventional method is to keep the daughter mirror and the mother mirror relatively fixed by a flexible strap. Specifically, a flexible strap is set on the handle of the daughter mirror. The flexible strap includes a free end and a fixed end. The flexible strap surrounds the tapered transition section of the imaging guide tube of the mother mirror and is then fastened to the handle of the daughter mirror. The friction between the flexible strap and the tapered transition section is used to keep the mother mirror and the daughter mirror relatively fixed.
[0006] However, the conventional method of using flexible straps is complicated. It requires first unfastening the fasteners and then tightening the flexible straps around the conical transition section of the imaging guide tube of the mother mirror. This is equivalent to wrapping the free end of the flexible straps around the conical transition section of the imaging guide tube and then fastening it to the fixed end. The operation is quite complicated and cannot be done with one hand. In addition, in order to make the friction force large enough, the length of the flexible straps is usually smaller than the diameter of the conical transition section. A large pulling force is required to force the flexible straps to extend tightly to the conical transition section, thereby providing a large fastening force.
[0007] In summary, providing a simple and easy-to-operate connection structure for the mother and daughter mirrors has become an urgent problem to be solved. Summary of the Invention
[0008] The technical problem this application aims to solve is: how to simplify the connection method between the mother mirror and the daughter mirror.
[0009] To solve the above-mentioned technical problems, the technical solution adopted in this application is as follows:
[0010] This application is an endoscope connection device, including a first connecting part for connecting the endoscope mirror and a second connecting part that can be slidably sleeved on the endoscope mother handle;
[0011] The first joint includes:
[0012] The connecting housing includes a first housing connected to the endoscope and a second housing integrally formed with the first housing.
[0013] The second joint includes:
[0014] A connecting sleeve for accommodating at least a portion of the endoscope master handle, the connecting sleeve being disposed within the second housing;
[0015] The endoscope connection device also includes a locking mechanism. By manipulating the locking mechanism, the connection state between the connecting sleeve and the endoscope master handle can be switched between a first connection state and a second connection state.
[0016] Furthermore, the locking mechanism includes:
[0017] A support frame is formed by extending the second housing outwards;
[0018] An eccentric cam is rotatably mounted on the support frame.
[0019] Furthermore, when the connecting sleeve is fitted onto the handle of the endoscope mother, a first connection state is formed between the connecting sleeve and the handle of the endoscope mother;
[0020] Further actuating the eccentric cam causes it to push against the connecting sleeve and deform towards the handle of the endoscope mother, switching the connection between the connecting sleeve and the handle of the endoscope mother from the first connection state to the second connection state.
[0021] Furthermore, compared to the first connection state, in the second connection state, the second joint applies a greater tightening force to the handle of the endoscope mother.
[0022] Furthermore, the first connecting part is non-detachably connected to the handle of the endoscope.
[0023] Furthermore, the support frame is formed by two protrusions extending outward from the second housing, and the eccentric cam is rotatably mounted on the support frame via a pivot disposed between the two protrusions.
[0024] Furthermore, a through hole is provided on the second housing between the two protrusions, and the eccentric cam is located at the through hole. When the eccentric cam is rotated, the eccentric cam part pushes against the connecting sleeve through the through hole, causing it to deform.
[0025] Furthermore, the eccentric cam has a lever extending outward along the rotation direction of the eccentric cam, and moving the lever will cause the eccentric cam to rotate.
[0026] Furthermore, an elastic pad is provided at the through hole.
[0027] Furthermore, the elastic pad is either integrally formed with or separate from the connecting sleeve.
[0028] Furthermore, the rotating surface of the eccentric cam has at least a portion of a flat surface, and the outer wall surface of the elastic pad is also a flat surface. By moving the eccentric cam, the flat surface of the eccentric cam is brought into close contact with the elastic pad. At this time, the connecting sleeve and the endoscope handle are in the first connection state.
[0029] Furthermore, the rotating surface of the eccentric cam has at least a partially arc-shaped working surface. The distance from any point on the working surface to the rotation center of the eccentric cam is greater than the minimum distance from the straight surface of the eccentric cam to the rotation center of the eccentric cam. By moving the eccentric cam, the working surface of the eccentric cam is brought into close contact with the elastic pad. At this time, the connecting sleeve and the endoscope handle are in a second connection state.
[0030] Furthermore, in the rotation direction of the eccentric cam switching from the second state to the first state, the distance from the working surface to the rotation center of the eccentric cam gradually increases.
[0031] Furthermore, the flat surface and working surface of the eccentric cam are smoothly connected in the circumferential direction of the eccentric cam.
[0032] Furthermore, the second housing is provided with a gripper, and the eccentric cam extends outward along the rotation direction of the eccentric cam with a fixing block. When the connecting sleeve and the endoscope mother handle are in the first connection state, the fixing block is clamped and fixed by the gripper.
[0033] Furthermore, positioning protrusions are provided on both sides of the fixing block, and limiting protrusions are provided on the opposite inner sides of the two grippers. The distance between the limiting protrusions is less than the distance between the two positioning protrusions.
[0034] Furthermore, when the fixing block is clamped and fixed by the gripper, the outer side of the positioning protrusion abuts against the inner side of the limiting protrusion.
[0035] Furthermore, the angle between the extending direction of the fixing block and the extending direction of the lever is 90°.
[0036] The beneficial effects of this application are as follows: This application relates to an endoscope connection device. During the operation, when it is necessary to connect and fix the endoscope to the endoscope mother, the connecting sleeve of this application is sleeved and connected to the handle part of the endoscope mother, and the locking mechanism is operated to achieve a simple and reliable connection between the endoscope mother and the endoscope. Attached Figure Description
[0037] Figure 1 is a schematic diagram of the endoscope connection device in Example 1;
[0038] Figure 2 is a partial cross-sectional view of the endoscope connection device in the first connection state in Embodiment 1;
[0039] Figure 3 is a partial cross-sectional view of the endoscope connection device in the second connection state in Embodiment 1;
[0040] Figure 4 is a cross-sectional view of the eccentric cam in Example 1;
[0041] Figure 5 is a partial cross-sectional view of the endoscope connection device in the first connection state in Embodiment 2;
[0042] Figure 6 is a partial cross-sectional view of the endoscope connection device in the second connection state in Embodiment 2.
[0043] Figure 7 shows a cross-sectional view of the eccentric cam in Embodiment 2;
[0044] Figure 8 is a partial cross-sectional view of the endoscope connection device in Example 2 with the elastic pad omitted.
[0045] Figure 9 is a schematic diagram of the endoscope connection device in Example 3;
[0046] Figure 10 is a partial cross-sectional view of the endoscope connection device in the first connection state in Embodiment 3;
[0047] Figure 11 is a partial cross-sectional view of the endoscope connection device in the second connection state in Embodiment 3;
[0048] Figure 12 is a diagram showing the second housing and the fixing block in the first connection state in Embodiment 3.
[0049] Figure 13 is an enlarged view of point A in Figure 12. Detailed Implementation
[0050] The present application will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present application, and therefore only show the components relevant to the present application.
[0051] To achieve a simple connection between the endoscope and the endoscope mother, this solution provides the following embodiments.
[0052] Example 1
[0053] Referring to Figure 1, which is a schematic diagram of the endoscope connection device, the endoscope connection device includes a first connecting part 1, a second connecting part 2, and a locking mechanism 3. The first housing 11 in the first connecting part 1 is connected to the endoscope endoscope (not shown in the figure), and the second housing 12 in the first connecting part 1 is used to slide and mount the endoscope mother endoscope (not shown in the figure) handle. The connecting sleeve 21 in the second connecting part 2 is located inside the second housing 12, and the endoscope mother endoscope handle can be mounted inside the connecting sleeve 21. The first housing 11 and the second housing 12 are integrally molded, for example, integrally injection molded.
[0054] The locking mechanism 3 includes a support frame 31 formed by two protrusions 311 extending outward from the second housing 12 and arranged opposite each other. An eccentric cam 33 is provided between the two protrusions 311 via a rotating shaft 32. A lever 34 is provided extending in the rotation direction of the eccentric cam 33. When the lever 34 is moved, the eccentric cam 33 can be rotatably positioned between the two protrusions 311.
[0055] The master endoscope can be a colonoscope or a gastroscope. Taking a duodenoscope as the master endoscope as an example, the endoscope itself can be a cholangioscope. During the procedure, the surgeon first inserts the imaging catheter of the duodenoscope into the body's natural cavities to take pictures or videos, allowing the surgeon to observe whether there are any lesions (such as digestive tract polyps or early digestive tract cancers) within the body's natural cavities. If the surgeon needs to further explore the narrower bile ducts (such as the intestines or esophagus) for lesions, or if minimally invasive surgery is required, the imaging catheter of the cholangioscope is inserted into the forceps port of the duodenoscope. The cholangioscope's imaging catheter then enters the bile duct for stone removal or biopsy. Because both the master and endoscopes need to be manipulated simultaneously, the endoscope is usually bound to the master endoscope or fixed in another way for easy one-handed operation.
[0056] During the surgery, to reduce the difficulty of operation, the endoscope connecting device in Embodiment 1 can be pre-connected to the cholangioscope through the first housing 11. When the cholangioscope is needed later, the endoscope connecting device can be connected to the endoscope mother (e.g., duodenoscope) through the second connecting part 2. Specifically, when the connecting sleeve 21 is fitted onto the handle of the endoscope mother, a first connection state is formed between the connecting sleeve 21 and the endoscope mother handle. By further manipulating the locking mechanism 3, the first connection state can be switched to the second connection state, thereby quickly and effectively cooperating with the duodenoscope. This allows the surgeon to hold the duodenoscope and cholangioscope with one hand, making it convenient for the surgeon to operate the cholangioscope for surgery.
[0057] As shown in Figure 2, which is a partial cross-sectional view of the endoscope connection device in the first connection state, the second housing 12 in the figure has a through hole 121 at the protrusion 311. An elastic pad 4 is provided in the through hole 121. The elastic pad 4 is located between the eccentric cam 33 and the connecting sleeve 21. The left side of the eccentric cam 33 is set as the first flat surface 331, and the right side of the elastic pad 4 is set as the second flat surface 41. The first flat surface 331 of the eccentric cam 33 and the second flat surface 41 of the elastic pad 4 are in contact. Due to factors such as manufacturing process errors, close contact can also meet the requirements. It is only necessary to avoid the eccentric cam 33 from rotating too easily, which would cause the first connection state to be unstable. In the solution provided in this embodiment, in the first connection state, the lever 34 is roughly in a vertically upward state. In another embodiment not shown, the elastic pad 4 can also be part of the connecting sleeve 21, that is, the elastic pad 4 and the connecting sleeve 21 are integrally molded. With this configuration, the elastic pad 4 can serve as an assembly reference during the manufacturing process. By inserting the elastic pad 4 into the through hole 121, the assembly between the connecting sleeve 21 and the second housing 12 is completed, simplifying the manufacturing process.
[0058] Since the eccentric cam 33 and the elastic pad 4 are in planar contact in the first connection state, the stability of the first connection state is guaranteed, that is, the eccentric cam 33 will not rotate if no additional force is applied.
[0059] As shown in Figure 3, which is a partial cross-sectional view of the endoscope connection device in the second connection state, when it is necessary to connect the endoscope to the endoscope mother, first connect the endoscope to the endoscope connection device, and then at least partially connect the connecting sleeve 21 to the handle of the endoscope mother. By turning the lever 34 clockwise, the eccentric cam 33 in Figure 2 will rotate clockwise by a certain angle, switching to the second connection state shown in Figure 3. During the process of switching from the first connection state to the second connection state, the elastic pad 4 moves to the left under the drive of the rotating eccentric cam 33. Since the elastic pad 4 and the connecting sleeve 21 are in planar contact, the connecting sleeve 21 is forced to deform to the left, applying a greater tightening force to the handle of the endoscope mother, thereby achieving the purpose of fixing the endoscope mother and the endoscope to each other.
[0060] The endoscope connection device of Embodiment 1 can also achieve rapid switching between the first connection state and the second connection state. During operation, the surgeon only needs to lift or press down to adjust the connection strength between the endoscope mother and the endoscope endoscope. Compared with the first connection state, in the second connection state, the second joint 2 applies a greater tightening force to the handle of the endoscope mother, making the connection strength between the endoscope mother and the endoscope endoscope higher, which facilitates providing the surgeon with more stable operating hardware conditions during the operation.
[0061] The size of the eccentric cam 33 can be determined based on actual design needs. Once the size of the eccentric cam 33 is confirmed, the maximum stroke of the eccentric cam 33 is also fixed, and the maximum resistance force given to the elastic pad 4 is also established. This can prevent damage to the endoscope due to excessive locking force, thus ensuring higher safety.
[0062] In summary, when it is necessary to connect and fix the endoscope to the endoscope mother during surgery, first connect the endoscope to the endoscope connecting device, then at least partially connect the connecting sleeve 21 to the handle of the endoscope mother, and turn the lever 34 to achieve a simple and quick connection between the endoscope mother and the endoscope.
[0063] In some possible implementations, the first housing 11 in the first joint 1 is non-detachably connected to the handle of the endoscope, that is, the first housing 11 can be part of the handle housing of the endoscope. This configuration further reduces the surgeon's operation process and operation time during the actual operation, and reduces the patient's waiting time.
[0064] In this embodiment, the first housing 11 and the endoscope are not detachable, ensuring the firmness of their connection and the accuracy of their fit. When the endoscope is needed during the use of the endoscope mother, since the endoscope is already detachably connected to the endoscope connecting device in this embodiment, it is not necessary to connect the endoscope to the first housing 11. Only the handle of the endoscope mother needs to be connected to the connecting sleeve 21, simplifying the connection between the endoscope and the endoscope mother.
[0065] Figure 4 is a cross-sectional view of the eccentric cam 33 in Embodiment 1. In the figure, the left side of the eccentric cam 33 is the first flat surface 331. The shortest distance from the first flat surface 331 to the rotation center 332 of the eccentric cam 33 is L1. The bottom of the eccentric cam 33 is an arc-shaped working surface 333. Along the counterclockwise direction, the distance L2 from the working surface 333 to the rotation center 332 gradually increases, and L1 is less than L2. In this way, when the elastic pad 4 contacts the working surface 331 at different positions, the deformation of the elastic pad 4 is inconsistent, which can adjust the magnitude of the force applied by the connecting sleeve 21 to the endoscope master handle.
[0066] Example 2
[0067] In Embodiment 1, the first flat surface 331 of the eccentric cam 33 fits against the second flat surface 41 of the elastic pad 4 to ensure the stability of the connecting device in the first connection state. However, when the connecting device is in the second connection state, as shown in Figure 3, the lever 34 is roughly horizontal, and the right end of the lever 34 is far away from the connecting sleeve 21. If the lever 34 is accidentally touched during the operator's operation, it will cause the lever 34 to rotate. More seriously, it will cause the endoscope mother to detach from the connecting sleeve 21, and the endoscope mother and endoscope cannot be fixedly connected. In order to solve the above problems, this application provides Embodiment 2.
[0068] Example 2 is largely the same in structure as Example 1, except for the design of the eccentric cam 33;
[0069] Figure 5 shows a schematic diagram of the endoscope connection device in the first connection state of Embodiment 2. In the figure, a fixing block 35 is provided on the left side of the eccentric cam 33 facing upward. The left side of the fixing block 35 is the third flat surface 351, and the right side of the elastic pad 4 is the second flat surface 41. The second flat surface 41 of the elastic pad 4 and the third flat surface 351 of the fixing block 35 are in surface contact, which ensures the stability of the eccentric cam 33 in the first connection state. A lever 34 is provided extending outward from the right side of the eccentric cam 33. The angle between the lever 34 and the extension direction of the fixing block 35 can be set to 90°. The length of the lever 34 is greater than the length of the fixing block 35.
[0070] Figure 6 shows a partial cross-sectional view of the endoscope connection device in the second connection state in Embodiment 2. The lever 34 in Figure 5 is rotated clockwise by a certain angle to form the second connection state shown in Figure 6. At this time, the fixing block 35 is set horizontally to the right, and the lever 34 is set horizontally downward. In this way, the free end of the lever 34 is closer to the connecting sleeve 21. Since the length of the lever 34 is greater than the length of the fixing block 35, the fixing block 35 does not protrude from the first housing 1. This design can better prevent the endoscope connection device from accidentally touching the lever 34 during the operation, and ensure the stability of the endoscope mother and endoscope endoscope in the second connection state.
[0071] In some possible implementations, as shown in Figure 8, the elastic pad 4 is no longer provided on the right side of the connecting sleeve 21, and the eccentric cam 33 directly abuts against the connecting sleeve 21. This can reduce the production cost of the device, but does not affect the purpose of fixing the endoscope and the endoscope mother to each other.
[0072] Figure 7 is a cross-sectional view of the eccentric cam 33 in Embodiment 2. In Figure 7, the top of the eccentric cam 33 has an upwardly extending fixing block 35. The left side of the fixing block 35 is a third flat surface 351. The shortest distance from the third flat surface 351 to the rotation center 332 of the eccentric cam 33 is L1. The lower part of the eccentric cam 33 is an arc-shaped working surface 333. Along the counterclockwise direction, the distance L2 from the working surface 333 to the rotation center 332 gradually increases, and L1 is less than L2. In this way, when the elastic pad 4 contacts the working surface 331 at different positions, the deformation of the elastic pad 4 is inconsistent, thereby adjusting the magnitude of the force applied by the connecting sleeve 21 to the endoscope master handle.
[0073] Example 3
[0074] In Embodiment 1, the flat surface of the eccentric cam 33 fits against the flat surface of the elastic pad 4 to ensure the stability of the connecting device in the first connection state; however, it may still be accidentally touched in some cases (e.g. during transportation), which means that the lever 34 needs to be reset when the endoscope mother is needed; in order to further improve the stability of the endoscope connecting device in the first connection state of this application, as shown in Figures 9, 10 and 11, this application discloses Embodiment 3.
[0075] In Embodiment 2, when the device is in the first connection state, the stability of this state is ensured by the second flat surface 41 of the elastic pad 4 and the third flat surface 351 of the fixing block 35 being in surface contact. However, in some scenarios, such as during transportation, the lever 34 may still be accidentally touched, which means that the lever 34 needs to be reset when the device is connected to the endoscope mother mirror. In order to solve the above problem, this application discloses Embodiment 3.
[0076] Example 3 has a structure that is largely the same as that of Example 2, the difference being the design of the second housing 12;
[0077] Figure 9 shows a schematic diagram of the endoscope connection device. A gripper 122 is located on the second housing 12, above the through hole 121. An eccentric cam 33 extends outwards, providing a fixing block 35 and a lever 34. It is understood that the width of the free end of the fixing block 35 is slightly greater than the groove width of the gripper 122, allowing the gripper 122 to securely clamp the free end of the fixing block 35, thus ensuring that the endoscope connection device in this embodiment is stably in the first connection state.
[0078] Figure 10 shows a partial cross-sectional view of the endoscope connection device in the first connection state in Embodiment 3. In the figure, the fixing block 35 is set upward, the positioning protrusion on the fixing block 35 cooperates with the gripper 122, the lever 34 is set horizontally to the right, and the angle between the extension directions of the fixing block 35 and the lever 34 is 90°.
[0079] As shown in Figures 12 and 13, positioning protrusions 351 are provided on both sides of the top of the fixing block 35. The positioning protrusions 351 cooperate with the gripper 122 to fix the fixing block 35 to the second housing 12 and restrict the rotation of the eccentric cam 33. Specifically, the gripper 122 consists of two limiting protrusions 123. The distance between the ends of the two limiting protrusions 123 away from the second housing 12 is less than the distance between the two positioning protrusions 351, and the distance between the ends of the two limiting protrusions 123 close to the second housing 12 is greater than or equal to the distance between the two positioning protrusions 351. In summary, the locking between the fixing block 35 and the second housing 12 is achieved.
[0080] Figure 11 shows a partial cross-sectional view of the endoscope connection device in the second connection state in Embodiment 3. The lever 34 in Figure 10 rotates clockwise to move the angle to form the second connection state shown in Figure 11. The elastic pad 4 moves to the left under the drive of the rotating eccentric cam 33, forcing the connecting sleeve 21 to apply a greater tightening force to the handle of the endoscope mother, thus fixing the device to the endoscope mother. At this time, the lever 34 is set downward, the fixing block 35 has disengaged from the clamp 122 and is set to the right. At this time, the endoscope mother and the device are connected in the second connection state.
[0081] Based on the above-described preferred embodiments according to this application, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.
Claims
1. An endoscope connection device, comprising a first connecting part for connecting an endoscope endoscope and a second connecting part slidably sleeved on the endoscope mother endoscope handle, characterized in that, The first joint includes: The connecting housing includes a first housing connected to the endoscope and a second housing integrally formed with the first housing. The second joint includes: A connecting sleeve for accommodating at least a portion of the endoscope master handle, the connecting sleeve being disposed within the second housing; The endoscope connection device also includes a locking mechanism. By manipulating the locking mechanism, the connection state between the connecting sleeve and the endoscope master handle can be switched between a first connection state and a second connection state.
2. The endoscope connecting device according to claim 1, characterized in that The locking mechanism includes: A support frame is formed by extending the second housing outwards; An eccentric cam is rotatably mounted on the support frame.
3. The endoscope connecting device according to claim 2, characterized in that When the connecting sleeve is fitted onto the handle of the endoscope mother, a first connection state is formed between the connecting sleeve and the handle of the endoscope mother. Further actuating the eccentric cam causes it to push against the connecting sleeve and deform towards the handle of the endoscope mother, switching the connection between the connecting sleeve and the handle of the endoscope mother from the first connection state to the second connection state.
4. The endoscope connecting device according to claim 3, characterized in that Compared to the first connection state, in the second connection state, the second joint applies a greater tightening force to the handle of the endoscope mother.
5. The endoscope connecting device according to claim 1, wherein The first joint is non-detachably connected to the handle of the endoscope.
6. The endoscope connecting device according to claim 2, wherein The support frame is formed by two protrusions extending outward from the second housing, and the eccentric cam is rotatably mounted on the support frame via a pivot shaft located between the two protrusions.
7. The endoscope connecting device according to claim 6, characterized in that A through hole is provided between the two protrusions on the second housing. The eccentric cam is located at the through hole. When the eccentric cam is rotated, the eccentric cam part pushes against the connecting sleeve through the through hole, causing it to deform.
8. The endoscope connecting device according to claim 7, characterized in that An elastic pad is provided at the through hole.
9. The endoscope connecting device according to claim 8, characterized in that The elastic pad is either integrally formed with or separate from the connecting sleeve.
10. The endoscope connecting device according to claim 8, characterized in that The rotating surface of the eccentric cam has at least a portion of a flat surface, and the outer wall surface of the elastic pad is also a flat surface. By moving the eccentric cam, the flat surface of the eccentric cam is brought into close contact with the elastic pad. At this time, the connecting sleeve and the endoscope handle are in the first connection state.
11. The endoscope connecting device according to claim 10, characterized in that The rotating surface of the eccentric cam has at least a partially arc-shaped working surface. The distance from any point on the working surface to the rotation center of the eccentric cam is greater than the minimum distance from the straight surface of the eccentric cam to the rotation center of the eccentric cam. The eccentric cam is moved so that the working surface of the eccentric cam is close to the elastic pad. At this time, the connecting sleeve and the endoscope handle are in a second connection state.
12. The endoscope connecting device of claim 11, wherein In the rotational direction of the eccentric cam switching from the second state to the first state, the distance from the working surface to the rotation center of the eccentric cam gradually increases.
13. The endoscope connecting device of claim 12, wherein, The flat surface and working surface of the eccentric cam are smoothly connected in the circumferential direction of the eccentric cam.
14. The endoscope connecting device of claim 2, wherein The eccentric cam has a lever extending outward along the rotation direction of the eccentric cam. Moving the lever causes the eccentric cam to rotate.
15. The endoscope connecting device of claim 14, wherein, The second housing is provided with a gripper, and the eccentric cam extends outward along the rotation direction of the eccentric cam with a fixing block. When the connecting sleeve and the endoscope mother handle are in the first connection state, the fixing block is clamped and fixed by the gripper.
16. The endoscope connecting device of claim 15, wherein The fixing block has positioning protrusions on both sides, and the two grippers have limiting protrusions protruding from their respective inner sides. The distance between the limiting protrusions is less than the distance between the two positioning protrusions.
17. An endoscope connecting device according to claim 16, characterized in that When the fixing block is clamped and fixed by the gripper, the outer side of the positioning protrusion abuts against the inner side of the limiting protrusion.
18. The endoscope connecting device of claim 15, wherein, The angle between the extending direction of the fixed block and the extending direction of the lever is 90°.