A bending structure for a laparoscopic electrocoagulation instrument

Abstract

This utility model relates to the field of medical device technology, specifically to a bending structure for an endoscopic electrocoagulation instrument, comprising an extension shaft, a traction component, and a material-adjusting component. The extension shaft has a built-in wiring channel, and a deformation component is disposed at one end along the axial direction. The traction component includes an operating end and a bending end, the bending end being fixedly connected to the deformation component, and the operating end extending beyond the extension shaft. The material-adjusting component is movably hinged, and has a positioning part for fixing the operating end. The positioning part rotates around the hinge point and has a displacement component that pulls the traction component to move along the axial direction of the extension shaft. In this application, the material-adjusting component is movably hinged without other locking structures, allowing for real-time adjustment as needed during bending, effectively shortening instrument adjustment time. The same instrument can adapt to the needs of different surgical stages through real-time bending, reducing the frequency of instrument replacement. Furthermore, the driving of the material-adjusting component is based on a displacement component in the traction direction, resulting in a simpler structural design.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a bending adjustment structure for an endoscopic electrocoagulation device. Background Technology

[0002] In laparoscopic minimally invasive surgery, electrocoagulation instruments are key tools, typically consisting of a functional end (electrocoagulation head), an extension shaft, and a handle. The functional end is controlled via the handle to perform operations such as tissue electrocoagulation and cutting. To meet the demands of the confined operating space and complex anatomical structures in laparoscopic surgery, the bending function of the functional end is crucial. It can be adjusted in angle to avoid tissue obstruction and precisely locate the surgical area.

[0003] In existing technologies, the bending function of electrocoagulation instruments mostly adopts a "locking" structural design. After the surgeon adjusts the functional end to the target bending angle using the handle, it needs to be fixed in position by a mechanical locking mechanism (such as a slot or bolt) to prevent angle deviation during operation. However, this design has significant drawbacks. Once the bending angle is locked, the surgeon cannot dynamically adjust the direction of the functional end according to real-time surgical needs (such as changes in tissue position or bleeding point displacement), requiring multiple unlocking, adjustment, and locking, thus prolonging the operation time. For surgical scenarios requiring repeated operations at multiple angles, a fixed bending angle cannot match the diverse needs of the surgical field, potentially increasing the risk of tissue damage. Furthermore, the coupled design of the bending adjustment mechanism and the locking mechanism in existing technologies prevents the functional end from achieving "real-time controllable and continuously adjustable" dynamic bending, limiting the operational efficiency and safety of laparoscopic surgery. Utility Model Content

[0004] The purpose of this invention is to provide a bending adjustment structure for laparoscopic electrocoagulation instruments, so as to solve the problem that the bending adjustment of instruments used in laparoscopic surgery is locked at the functional end of the head, resulting in inflexible operation.

[0005] The technical solution of this utility model is: a bending adjustment structure for an endoscopic electrocoagulation instrument, comprising: An extension shaft portion has a built-in wiring channel and a deformation member is disposed on one end along the axial direction; the deformation member is normally coaxially arranged with the extension shaft portion. The traction member extends through the extension shaft and includes an operating end and a bending end. The bending end is fixedly connected to the deformation member, and the operating end extends beyond the extension shaft. A material feeding component is provided with a hinged arrangement. The material feeding component has a positioning part for fixing the operating end. The positioning part rotates about the hinge point and has a displacement component that pulls the traction component to move along the axis of the extended shaft.

[0006] Preferably, at least two traction members are provided, and each is independently tractioned by the material feeding member.

[0007] Preferably, the traction component is provided in two parts, and the deformation component has a tubular structure. Under normal conditions, the two bending ends are distributed in the same plane passing through the central axis of the deformation component.

[0008] Preferably, the feeding component has two positioning parts for fixing the two traction components, and the distribution direction of the two positioning parts is perpendicular to the rotation axis of the feeding component.

[0009] Preferably, the deformation component is a snake-bone tube, and the bending end is inserted into the snake-bone tube along a direction parallel to the central axis of the snake-bone tube in its normal state, and is bent by the pulling of the material-pulling component.

[0010] Preferably, the length of the bending end passing through the snake bone tube is not less than the structural length of the snake bone tube that allows it to bend and deform.

[0011] Preferably, the snake-bone tube is constructed as a non-memory structure, and the feeder is continuously stressed in the bending state.

[0012] Preferably, the deformable member is covered with a flexible structure, the axial length of the flexible structure is greater than the axial length of the deformable member, and there is an overlap area between the flexible structure and the extended shaft.

[0013] Preferably, the extended shaft portion has a guide member through which the traction member passes and guides.

[0014] Preferably, the traction member is stretched in the normal and traction state, and in the non-traction state, the distance between the side of the guide member away from the bending end and the material feeding member forms a space for the traction member to relax and hang down.

[0015] Compared with the prior art, the advantages of this utility model are: In this application, the material-pulling component is set with a movable hinge and no other locking structure is configured. During the bending process, it can be adjusted in real time as needed, making the operation more flexible and effectively shortening the instrument adjustment time. The same instrument can adapt to the needs of different surgical stages through real-time bending, reducing the frequency of instrument changes and improving surgical continuity. At the same time, the driving of the material-pulling component is based on a displacement component with a traction direction, which makes the structural design simpler and also makes the operation simpler. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the bending adjustment structure for an endoscopic electrocoagulation instrument according to the present invention in an application scenario; Figure 2 This is a schematic diagram of the snake-bone tube described in this utility model; Figure 3 This is an enlarged view of the structure of the snake bone tube connection described in this utility model; Figure 4 This is a schematic diagram of the connection structure between the snake bone tube and the traction component described in this utility model; Figure 5 This is a front view of the snake-bone tube and traction component described in this utility model, viewed along the axial direction. Figure 6 This is a schematic diagram of the connection between the material feeding component and the traction component of this utility model.

[0017] Among them: 1. Extended shaft portion; 11. Function terminal; 12. Operating handle; 2. Deformation components; 21. Snake-bone tube; 211. Concave arc-shaped segment; 22. Flexible structure; 3. Traction components; 31. Bending end; 32. Operating end; 4. Material feeding parts; 41. Positioning section. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to specific embodiments: like Figure 1 As shown, a bending adjustment structure for laparoscopic electrocoagulation instruments is used to adjust the bending of the functional end 11 of the instrument head during laparoscopic surgery, such as the bending adjustment of the head of electrocoagulation forceps; the bending adjustment structure for laparoscopic electrocoagulation instruments includes an extension shaft 1, a traction component 3, and a material-pulling component 4.

[0019] like Figure 1 As shown, the extension shaft 1 is a slender tube with high strength and low friction, typically made of stainless steel hollow tube, titanium alloy, or carbon fiber. The extension shaft 1 has a built-in wiring channel, and a deformation member 2 is located at one end along the axial direction. The end of the deformation member 2 is used to connect to the functional end 11, such as an electrocoagulation forceps. The end of the extension shaft 1 away from the deformation member 2 is used to connect to the operating handle 12. In laparoscopic minimally invasive surgery, the extension shaft 1 is a key structure connecting the operating handle 12 and the functional end 11, used to transmit the operating force applied at the end of the operating handle 12 to the functional end 11 without loss.

[0020] The deformable member 2 is normally coaxially arranged with the extension shaft 1; in this embodiment, as... Figure 2 As shown, the deformable component 2 is a snake tube 21. The snake tube 21 is a non-memory structure, that is, under the condition of external force, the snake tube 21 can bend and deform. Under the condition of external force release, the snake tube 21 will return to its normal state, that is, the axis is straight.

[0021] In the application scenario, the deformable component 2 is located on the side biased towards the functional end 11, within the body cavity. Since the deformable component 2 is a non-sealed tubular structure, a flexible structure 22 covers its outer side, such as... Figure 3 As shown, the axial length of the flexible structure 22 is greater than the axial length of the deformable member 2, fully covering the deformable member 2, and there are overlapping areas between the flexible structure 22, the extension shaft 1, and the functional end 11. This flexible structure 22 can accommodate the bending of the deformable member 2, and also provides an effective sealing function.

[0022] Combination Figure 1 As shown, the traction member 3 passes through the extension shaft 1 and can be made of steel wire rope or other ropes that are not elastic but have a certain tensile strength; the traction member 3 includes an operating end 32 and a bending end 31, the bending end 31 being fixedly connected to the deformation member 2; the operating end 32 extends beyond the extension shaft 1 and is fixedly connected to the material feeding member 4.

[0023] At least two traction members 3 are provided, and each is independently tractioned by the material-pushing member 4. That is, when the material-pushing member 4 applies a force, it always applies a traction force to only one traction member 3. In this embodiment, combined with Figure 4 , Figure 5 As shown, the traction component 3 has two members, and the deformation component 2 has a tubular structure. The bending end 31 passes through the snake-bone tube 21 along a direction parallel to its normal central axis and is tractioned by the material-pulling component 4 to cause the snake-bone tube 21 to bend. Under normal conditions, the two bending ends 31 are distributed in the same plane passing through the central axis of the deformation component 2, so as to... Figure 5 Taking the orientation shown as an example, the two traction members 3 are arranged in a vertical plane passing through the central axis of the deformable member 2. Of course, in other embodiments, the two traction members 3 can also be arranged in a horizontal plane passing through the central axis of the deformable member 2.

[0024] Regarding the connection between the snake bone tube 21 and the traction component 3, specifically, as follows: Figure 5 As shown, the outer wall of the snake tube 21 has several concave arc-shaped segments 211 arranged in an array parallel to the axial direction. The concave arc-shaped segments 211 and the main body structure of the snake tube 21 form a space for the traction member 3 to be accommodated.

[0025] It should be noted that since the traction member 3 is used to pull the snake tube 21 to bend, the end of the traction member 3 cannot be fixed at the root position of the snake tube 21 (near the extension shaft 1), but should be set as close as possible to the head of the snake tube 21 (near the functional end 11). Therefore, in this application, the length of the bending end 31 passing through the snake tube 21 is not less than the structural length of the snake tube 21 that can be bent and deformed. The structural length that can be bent and deformed can be understood as the length of the array of concave arc segments 211, that is: the bending end 31 of the traction member 3 must pass through the space between all the concave arc segments 211 and the main structure of the snake tube 21.

[0026] like Figure 5 As shown, the material feeding component 4 is movably hinged on the operating handle 12. The material feeding component 4 has a positioning part 41 for fixing the operating end 32. The positioning part 41 rotates around the hinge point and has a displacement component that pulls the traction component 3 to move along the axis of the extension shaft 1.

[0027] In this embodiment, since there are two traction members 3, the material feeder 4 has two positioning parts 41 for fixing the two traction members 3. The distribution direction of the two positioning parts 41 is perpendicular to the rotation axis of the material feeder 4. That is: Figure 6 Taking the direction shown as an example, the two positioning parts 41 are distributed vertically, and the rotation axis of the material pusher 4 is set horizontally. In this case, the material pusher 4 is used for pushing back and forth. Of course, in other embodiments, the two positioning parts 41 can also be distributed horizontally, and the rotation axis of the material pusher 4 is set vertically. In this case, the material pusher 4 is used for pushing left and right.

[0028] Because the material guide 4 is hinged and does not have other locking structures, and because the snake tube 21 is constructed as a non-memory structure, the material guide 4 needs to be continuously forceped during bending. Therefore, it can be adjusted in real time as needed during bending, making operation more flexible. Thus, the material guide 4 needs to be positioned on the operating handle 12 in an easily controllable location. In this embodiment, the material guide 4 is located at the ridge of the operating handle 12, extending in the direction of the extension shaft 1. The operator can use their thumb to control it in real time after gripping the handle and continuously apply force when the desired bending angle is reached.

[0029] In this embodiment, combined with Figure 6As shown, when the material feeder 4 is manually driven to rotate downwards, the upper traction member 3 is pulled towards the operating handle 12 and moves backwards, while the lower traction member 3 is in a relaxed state. At this time, the deformation member 2 bends upwards. When the material feeder 4 is manually driven to rotate upwards, the lower traction member 3 is pulled towards the operating handle 12 and moves backwards, while the upper traction member 3 is in a relaxed state. At this time, the deformation member 2 bends downwards. When the deformation member 2 bends, it can cause the functional end 11 at its front end to deflect. The bending angle can be adjusted by controlling the rotation angle of the material feeder 4.

[0030] As a further optimization, since the extension shaft 1 is a slender tube with multiple pipes and lines inside, the traction component 3 needs to be reasonably arranged inside the extension shaft 1 to prevent disorder in the slack state. Therefore, the extension shaft 1 has a guide component for the traction component 3 to pass through and guide.

[0031] The traction component 3 is stretched in normal and traction states. In non-traction states, the distance between the guide component away from the bending end 31 and the material feeding component 4 forms a space for the traction component 3 to relax and hang down. This space can be understood as being located within the operating handle 12.

[0032] In summary, the movable hinge design of the material guide 4 in this application allows for real-time adjustment during bending, making operation more flexible and effectively shortening instrument adjustment time. The same instrument can adapt to different surgical stages through real-time bending, reducing instrument change frequency and improving surgical continuity. Furthermore, the drive of the material guide 4 is based on a displacement component with a traction direction, resulting in a simpler structural design and easier operation. In use, deflection of the functional end can be achieved simply by applying force to the material guide 4.

[0033] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore, all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model.

Claims

1. A bending adjustment structure for an endoscopic electrocoagulation instrument, characterized in that, include: An extension shaft portion, wherein the extension shaft portion has a built-in wiring channel and a deformable member is disposed on one end along the axial direction; The deformable component is normally coaxially arranged with the extended shaft. The traction member extends through the extension shaft and includes an operating end and a bending end. The bending end is fixedly connected to the deformation member, and the operating end extends beyond the extension shaft. A material feeding component is provided with a hinged arrangement. The material feeding component has a positioning part for fixing the operating end. The positioning part rotates about the hinge point and has a displacement component that pulls the traction component to move along the axis of the extended shaft.

2. The bending structure for a cordless electrosurgical instrument according to claim 1, wherein: At least two traction components are provided, and each is independently tractioned by the material feeding component.

3. The bending structure for a cordless electrosurgical instrument according to claim 2, wherein: The traction component is provided with two members, and the deformation component has a tubular structure. Under normal conditions, the two bending ends are distributed in the same plane passing through the central axis of the deformation component.

4. The bending structure for a cordless electrosurgical instrument according to claim 3, wherein: The feeding component has two positioning parts for fixing the two traction components, and the distribution direction of the two positioning parts is perpendicular to the rotation axis of the feeding component.

5. The bending structure for a cordless electrosurgical instrument according to claim 3, wherein: The deformation component is a snake-bone tube. The bending end is inserted into the snake-bone tube along a direction parallel to the central axis of the snake-bone tube in its normal state, and is pulled by the material-pulling component to cause the snake-bone tube to bend.

6. The bending adjustment structure for a laparoscopic electrocoagulation instrument according to claim 5, characterized in that: The length of the bending end passing through the snake bone tube is not less than the structural length of the snake bone tube that allows it to bend and deform.

7. The bendable structure for use in an endoscopic electrocoagulation instrument according to claim 5, characterized in that: The snake-bone tube is constructed as a non-memory structure, and the feeder is continuously stressed when bent.

8. The bendable structure for use in an endoscopic electrocoagulation instrument according to claim 1, characterized in that: The deformable member is covered with a flexible structure on its outside. The axial length of the flexible structure is greater than the axial length of the deformable member. There is an overlap area between the flexible structure and the extended shaft.

9. The bendable structure for use in an endoscopic electrocoagulation instrument according to claim 2, characterized in that: The extended shaft has a guide member through which the traction member passes and guides.

10. The bendable structure for use in an endoscopic electrocoagulation instrument according to claim 9, characterized in that: The traction component is stretched in normal and traction states. In non-traction states, the distance between the side of the guide component away from the bending end and the material feeding component forms a space for the traction component to relax and hang down.

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