Passive bending part of snake bone of endoscope and snake bone of passive bending part
By designing a limiting hook and limiting groove structure, the problem of passive bending part deviation is solved, realizing flexible bending and accurate positioning of the endoscope, and extending its service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2026-03-06
AI Technical Summary
In existing technologies, the passive bending section relies on a spiral groove to achieve bending, which makes it prone to deviation, causing the endoscope to fail to accurately reach the intended position.
The structure employs a limiting hook and limiting groove, and through the design of rotation gap and elastic beam, it restricts the bending direction of the passive bending part, avoids deflection, and provides buffering during extreme bending to prevent snake bone breakage.
It improves the bending flexibility and positioning accuracy of the endoscope, avoids the endoscope deviating inside the body, and extends its service life.
Smart Images
Figure CN223969107U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, and in particular to an endoscope with a passive bending section for the snake bone and the snake bone itself. Background Technology
[0002] The important bending components of an endoscope consist of an active bending section and a passive bending section, collectively referred to as the "snake skeleton." These are used to insert into internal organs and allow the operator to control their bending along a preset direction to adjust the endoscope's imaging position. The active bending section bends automatically through the operator's bending maneuvers. Its tail end connects to the passive bending section, which bends passively in response to the active bending section's bending, compensating for the active bending section's angle and allowing the operator to view a larger area of the internal cavity.
[0003] In the prior art, the passive bending part is a hollow tube with a spiral groove extending along the axial direction, so that the tube can have a certain bending range to follow the bending of the active bending part. However, because the groove is a spiral structure, it has an inclination angle, which causes the passive bending part to often deviate when bending, making it impossible for the endoscope to reach the intended position. Utility Model Content
[0004] The technical problem to be solved by this utility model is: in order to solve the problem that the passive bending part of the prior art often deviates when it relies solely on the spiral groove to achieve bending, thus preventing the endoscope from reaching the predetermined position, an endoscope snake bone passive bending part and its snake bone are provided.
[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an endoscope snake bone passive bending part, including a hollow tube body, on which a spiral groove extending along the axial direction and penetrating the tube wall in the radial direction is opened. The spiral groove divides the tube body into multiple tube sections connected in sequence, and a limiting structure is provided between adjacent tube sections to limit the bending direction and bending amplitude of both.
[0006] The limiting structure includes a limiting hook protruding from one of the pipe sections and a limiting groove formed from the other pipe section and cooperating with the limiting hook. There is a rotational gap between the limiting groove and the limiting hook, and an elastic beam is formed on one side of the groove wall for buffering when the two pipe sections are bent to their limits.
[0007] Furthermore, one end of the elastic beam is a fixed end that is fixed to the pipe section, and the other end is a free end, which is a protruding limiting part that limits the limiting hook.
[0008] Furthermore, the limiting hooks and limiting grooves on the same pipe section are located on both sides of the pipe section along its axial direction, and there are multiple limiting hooks and limiting grooves, which are evenly distributed along the circumference of the pipe section.
[0009] Furthermore, multiple limit hooks on the same pipe section are set in pairs, and the two limit hooks in each pair are bent towards each other.
[0010] Furthermore, the head of the limiting hook is provided with a first limiting plane, and a second limiting plane is formed between the fixed end and the free end of the elastic beam for cooperating with the first limiting plane.
[0011] Furthermore, the rotational clearance between the limiting slot and the limiting hook is not greater than the wall thickness of the tube.
[0012] Furthermore, the cross-sectional area of the limiting hook gradually decreases along the direction that moves away from its location in the pipe section.
[0013] An endoscopic snake skeleton includes an active bending portion and the aforementioned passive bending portion.
[0014] The beneficial effects of this utility model are as follows: This utility model utilizes the rotational gap between the limiting hook and the limiting groove to meet the bending requirements of the endoscopic skeleton, and uses the limiting groove to restrict the movement of the limiting hook to avoid the passive bending part from deviating, thereby ensuring the accuracy of the endoscope position. In addition, when the elastic beam and the limiting hook come into contact, a certain amount of elastic deformation can occur, thereby preventing the operator from using excessive force during use, which could lead to the breakage of the endoscopic skeleton. Attached Figure Description
[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0016] Figure 1 This is a three-dimensional schematic diagram of the passively bent section;
[0017] Figure 2 yes Figure 1 A magnified view of part A in the middle;
[0018] Figure 3 This is the front view of the passively bent section;
[0019] Figure 4 yes Figure 3 A magnified view of part B in the middle section;
[0020] Figure 5 This is a schematic diagram of the snake skeleton;
[0021] Figure 6 yes Figure 5 A magnified view of part C in the middle;
[0022] In the picture:
[0023] 1. Pipe body;
[0024] 2. Spiral groove;
[0025] 3. Pipe section;
[0026] 4. Limiting hook; 401. First limiting plane;
[0027] 5. Limiting slot;
[0028] 6. Rotation clearance;
[0029] 7. Elastic beam; 701. Limiting part; 702. Second limiting plane;
[0030] 8. Active bending section; 801. Joint unit; 802. Male connector; 803. Female connector;
[0031] 9. Traction hole. Detailed Implementation
[0032] The present invention 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 invention. Therefore, they only show the components relevant to the present invention. Orientations and references (e.g., up, down, left, right, etc.) are only used to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be restrictive, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.
[0033] like Figures 1-4 As shown, an endoscope snake bone passive bending part is integrally formed and includes a hollow tube body 1. The tube body 1 is a round tube. A spiral groove 2 extending along the axial direction and penetrating the tube wall radially is opened on the tube body 1. The spiral groove 2 divides the tube body 1 into a plurality of tube sections 3 connected in sequence. A limiting structure is provided between adjacent tube sections 3 to limit the bending direction and bending amplitude of both.
[0034] The limiting structure includes a limiting hook 4 protruding from one of the pipe sections 3 and a limiting groove 5 recessed from the other pipe section 3 and cooperating with the limiting hook 4. The limiting hook 4 is located inside the limiting groove 5, and there is a rotation gap 6 between the outer peripheral wall of the limiting hook 4 and the groove wall of the limiting groove 5 to form a partial spiral groove 2. The rotation gap 6 allows the limiting hook 4 to rotate within the limiting groove 5 to meet the bending requirements of the snake bone. In addition, the limiting hook 4 and the limiting groove 5 are generally arc-shaped, which can satisfy the relative rotation of the two and avoid interference when the two rotate.
[0035] One side of the limiting groove 5 has an elastic beam 7 formed on its groove wall to buffer the extreme bending of the two pipe sections 3. When the passively bent part reaches the extreme bending angle, the limiting hook 4 abuts against the elastic beam 7. Under the interaction force, the two can undergo a certain elastic deformation, thereby preventing the snake bone from breaking due to excessive force applied by the operator during use.
[0036] When the passive bending section bends, the rotation gap 6 between the limiting hook 4 and the limiting groove 5 allows the limiting hook 4 to rotate within the limiting groove 5 to meet the bending requirements of the snake bone, improve the flexibility of the snake bone bending section, expand the operator's observation range, and at the same time play a buffering role, avoiding direct contact between the active bending section 8 and the human body, thereby avoiding damage to the human body caused by the endoscope. At the same time, the limiting groove 5 can limit the movement of the limiting hook 4 to a certain extent to prevent the passive bending section from deviating, so as to ensure the accuracy of the endoscope position. In addition, when the elastic beam 7 and the limiting hook 4 abut, a certain elastic deformation can occur to provide a buffering effect, thereby preventing the operator from using excessive force during use, which may cause the snake bone to break.
[0037] In some examples, one end of the elastic beam 7 is a fixed end that is fixed to the pipe section 3, and the other end is a free end. The free end is a limiting part 701 that protrudes to limit the limiting hook 4. The limiting part 701 is arc-shaped to reduce stress concentration and to avoid damage to the limiting hook 4 caused by the sharp point of the non-arc structure when the limiting hook 4 is engaged with the limiting groove 5, thereby improving the service life of the passive bending part.
[0038] In some examples, the limiting hooks 4 and limiting grooves 5 on the same pipe section 3 are located on both sides of the pipe section 3 along its axial direction, and there are multiple limiting hooks 4 and limiting grooves 5. Multiple limiting hooks 4 are located on one side of the pipe section 3 and are evenly distributed along the circumference of the pipe section 3, and multiple limiting grooves 5 are located on the other side of the pipe section 3 and are also evenly distributed along the circumference of the pipe section 3. Since the passive bending part is integrally cut from the hollow pipe body 1, the unidirectional arrangement can simplify the cutting path and improve the cutting efficiency.
[0039] In some examples, multiple limiting hooks 4 on the same pipe section 3 are arranged in pairs, and the two limiting hooks 4 in each pair are bent towards each other, so as to... Figure 3 For example, when the passively bent part bends from bottom to top to the left, the left-side limiting hook 4 and the limiting groove 5 cooperate to limit it. When the passively bent part bends from bottom to top to the right, the right-side limiting hook 4 and the limiting groove 5 cooperate to limit it. The number of pairs of limiting hooks 4 can be, but is not limited to, two or three pairs.
[0040] In some examples, the head of the limiting hook 4 is provided with a first limiting plane 401, which has a large surface area. A second limiting plane 702 is formed between the fixed end and the free end of the elastic beam 7 for cooperating with the first limiting plane 401. When the passive bending part is bent to its limit, the first limiting plane 401 and the second limiting plane 702 abut against each other, which can increase the contact area between the two, thereby reducing the pressure and reducing the possibility of the limiting hook 4 breaking.
[0041] In some examples, the rotational gap 6 between the limiting groove 5 and the limiting hook 4 is not greater than the wall thickness of the tube body 1, so as to prevent jamming when the limiting groove 5 and the limiting hook 4 rotate relative to each other.
[0042] In some examples, the cross-sectional area of the limiting hook 4 gradually decreases in the direction away from its location in the pipe section 3, so that it has sufficient elasticity to abut against the elastic beam 7 for buffering when the passive bending section is under extreme bending.
[0043] like Figure 5 and Figure 6 As shown, an endoscopic snake skeleton includes an active bending section 8 and the aforementioned passive bending section. The active bending section 8 includes several joint segments 801 connected end to end, and the axial extension length of the joint segments 801 gradually decreases in the direction away from the passive bending section. A connecting structure is provided between two adjacent joint segments 801. The connecting structure includes a male connector 802 located on one joint segment 801 and a female connector 803 located on the other joint segment 801. The male connector 802 is inserted into the female connector 803 and the two are rotatably connected. The active bending section 8 and the passive bending section are also rotatably connected through the male connector 802 and the female connector 803. Both the active bending section 8 and the passive bending section have recessed traction holes 9 for the traction rope to pass through. The operator controls the bending direction and bending amplitude of the snake skeleton by using the traction rope.
[0044] Working principle:
[0045] When the operator bends the endoscopic skeleton using the traction rope, the limiting hook 4 rotates within the limiting groove 5 to meet the bending requirements of the endoscopic skeleton. At the same time, the limiting groove 5 can restrict the movement of the limiting hook 4 to a certain extent to prevent the passively bent part from deviating, thus ensuring the accuracy of the endoscope position. In addition, when the elastic beam 7 and the limiting hook 4 come into contact, they can undergo a certain elastic deformation to provide a buffering effect, thereby preventing the operator from using excessive force and causing the endoscopic skeleton to break. At the same time, the contact between the first limiting plane 401 of the limiting hook 4 and the second limiting plane 702 of the limiting groove 5 can increase the contact area between the two, thereby reducing the pressure and reducing the possibility of the limiting hook 4 breaking.
[0046] Based on the above-described preferred embodiments of this utility model, 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 serpentine passive bending section, characterized by: The hollow pipe body (1) is provided with helical grooves (2) extending along the axial direction and penetrating the pipe wall along the radial direction, which divide the pipe body (1) into a plurality of pipe sections (3) connected in sequence, and a limiting structure is arranged between adjacent pipe sections (3) to limit the bending direction and bending amplitude of the pipe sections (3); The limiting structure comprises a limiting hook (4) protruding from one of the pipe sections (3) and a limiting groove (5) recessed from the other pipe section (3) and matched with the limiting hook (4), and the limiting groove (5) and the limiting hook (4) have a rotation gap (6) therebetween, and one side wall of the limiting groove (5) is provided with an elastic beam (7) for buffering when the two pipe sections (3) are bent to the limit.
2. An endoscope snake bone passive bending section according to claim 1, characterized in that: One end of the elastic beam (7) is a fixed end fixed to the pipe section (3), and the other end is a free end, and the free end is a limiting portion (701) protruding to limit the limiting hook (4).
3. An endoscope snake bone passive bending section according to claim 1, characterized in that: The limiting hook (4) and the limiting groove (5) on the same pipe section (3) are located on both sides of the pipe section (3) along the axial direction, and both the limiting hook (4) and the limiting groove (5) have a plurality of limiting hooks (4) and limiting grooves (5) uniformly distributed along the circumferential direction of the pipe section (3).
4. An endoscope snake bone passive bending section according to claim 3, characterized in that: The plurality of limiting hooks (4) on the same pipe section (3) are arranged in pairs, and the two limiting hooks (4) in each pair are curved towards each other.
5. An endoscope snake bone passive bending section according to claim 2, characterized in that: The limiting hook (4) is provided with a first limiting plane (401) at the head, and the fixed end and the free end of the elastic beam (7) form a second limiting plane (702) matched with the first limiting plane (401).
6. The endoscope snake bone passive bending section of claim 1, wherein: The rotation gap (6) between the limiting groove (5) and the limiting hook (4) is not greater than the wall thickness of the pipe body (1).
7. The endoscope snake bone passive bending section according to claim 1, wherein: The cross-sectional area of the limiting hook (4) gradually decreases in the direction gradually away from the pipe section (3) where the limiting hook (4) is located.
8. A serpentine bone, characterized by: The limiting hook (4) comprises an active bending portion (8) and a passive bending portion connected with the active bending portion (8) and as claimed in any one of claims 1-7.