Snake bone structure and snake bone chain of endoscope

Abstract

The utility model discloses an endoscope snake bone structure and a snake bone chain, the snake bone structure comprises snake bone joints, the two end faces of each snake bone joint are respectively provided with a son rotating part and a mother rotating part, the center lines of the end faces of the snake bone joints, the son rotating parts and the mother rotating parts incline towards the same direction, and the son rotating parts and the mother rotating parts of the adjacent snake bone joints are connected in a sleeved mode to form rotating joints. By arranging the inclined end faces and the inclined connecting structures, when the front-end snake joint rotates relative to the rear-end snake joint, the overlapping length of the connecting structures between the front-end snake joint and the rear-end snake joint is increased, the snake bone stability is improved, the snake bone reliability is improved, and the occupied internal space of the snake bone chain is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of medical instruments, especially a kind of endoscope snake bone structure, further relates to a kind of snake bone chain. BACKGROUND

[0002] In modern medicine, endoscopic technology is widely used in various surgical operations due to its minimally invasive nature. Snake bone, as an important part of endoscopic operation, its performance directly affects the effect of surgery. To prevent shedding, traditional cutting snake bone design usually adopts double-layer structure, which leads to larger outer diameter of snake bone, limiting its application in more delicate operations. In addition, double-layer structure also increases manufacturing difficulty and cost.

[0003] Utility model patent application with publication number CN 209220212 U discloses a double-ring embracing rotating structure, including a mother rotating part and a child rotating part. The mother rotating part includes a circular protrusion, an inner embracing annular groove arranged around the circular protrusion, and an outer embracing annular protrusion arranged around the inner embracing annular groove. The child rotating part includes an inner embracing annular protrusion for embracing the circular protrusion and an outer embracing annular groove arranged around the inner embracing annular protrusion. The letter rotating part is connected, and the two adjacent snake bone segments can rotate relative to each other. In this scheme, the child and mother rotating parts are symmetrical structures. When one snake bone segment rotates relative to another snake bone segment, the overlapping part of the child and mother rotating parts on one side of the axial direction increases, while the overlapping part of the child and mother rotating parts on the other side of the axial direction decreases, and the stability of the snake bone chain in the rotating state decreases. SUMMARY

[0004] The utility model aims to provide an endoscope snake bone structure that improves stability during use. Another object of the utility model is to provide a snake bone chain.

[0005] Technical solution: The endoscope snake bone structure includes a snake bone segment. Two end faces of the snake bone segment are respectively provided with a child connecting part and a mother connecting part. The center lines of the end face, the child connecting part, and the mother connecting part are inclined in the same direction. The child connecting part and the mother connecting part of adjacent snake bone segments are sleeved to form a rotating joint.

[0006] Preferably, the mother connecting part includes a circular protrusion and an arc-shaped claw arranged inside and outside. The end of the circular protrusion and the claw are arranged with the same center. A first arc-shaped groove for sleeving the child connecting part is formed between the circular protrusion and the claw.

[0007] Preferably, the child connecting part and the snake bone segment have a first connecting segment. The end of the claw has an opening for accommodating the first connecting part. The connecting segment between the circular protrusion and the snake bone segment and the opening are both deviated from the axis of the snake bone segment.

[0008] Preferably, the sub-connector includes an annular lug, and a circular groove and a second arc-shaped groove for fitting the female connector are formed inside the lug, outside the lug, and between the snake joint.

[0009] Preferably, a second connecting segment is provided between the sub-connecting part and the serpentine segment, and the end of the awl has a notch to accommodate the second connecting segment. The connecting segment and the notch between the awl and the serpentine segment are both offset from the axis of the serpentine segment.

[0010] Preferably, the two end faces of the snake joint are respectively provided with snaps and slots that can be inserted into each other, and the width direction of the snaps and slots is consistent with the axis of rotation of the sub-connector and the female connector.

[0011] Preferably, the buckles and slots are symmetrically arranged at both ends of the snake bone segment.

[0012] Preferably, the sub-connecting part and the female connecting part are symmetrically arranged at both ends of the snake bone segment in the radial direction.

[0013] Preferably, the snake bone segment is provided with a traction wire channel.

[0014] A snake bone chain, formed by splicing the first and second segments of the aforementioned snake bone.

[0015] Beneficial Effects: Compared with the prior art, this utility model has the following advantages: 1. Improved stability during snake bone use: By setting inclined end faces and inclined connection structures, the overlap length of the connection structure between the front and rear snake bone segments is increased when the front snake bone segment rotates relative to the rear snake bone segment, thus improving the stability and reliability of the snake bone; 2. Increased internal space of the snake bone chain: The front and rear end faces of the snake bone segments are inclined, and the positions of the buckles and slots are also offset accordingly. Therefore, when the snake bone chain is bent, the protruding structure formed by the buckle occupies less space, increasing the internal space of the snake bone chain and reducing the impact of the protruding structure on other pipelines within the snake bone chain; 3. Ensured tight connection between snake bone segments and simplified structure: The rotating connection between snake bone segments is achieved by setting interlocking slots and buckle structures on both sides of the snake bone segments, preventing adjacent snake bone segments from misaligning or loosening along the rotation axis, simplifying the structure and optimizing the dimensions, allowing for a smaller outer diameter; 4. Simplified manufacturing process: The inclined end face can be formed by a single beveling cut on the end face of the snake bone segment, reducing production costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the snake chain structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the snake bone chain head structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the snake joint structure in the straightened state of this utility model;

[0019] Figure 4 This is a schematic diagram of the snake-bone joint bending state structure of this utility model;

[0020] Figure 5 for Figure 3 Another perspective structural diagram;

[0021] Figure 6 for Figure 2 Another perspective structural diagram;

[0022] Figure 7 This is a side view of the snake-bone joint structure of this utility model;

[0023] Figure 8 This is a cross-sectional view of the snake-like joint in a bent state according to the present invention. Detailed Implementation

[0024] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0025] like Figures 1 to 4 As shown, the snake-bone chain is formed by splicing together several snake-bone segments 1 end to end. When the snake-bone segments 1 are closed, they form a cylindrical structure. The two ends of each snake-bone segment 1 are respectively provided with female and male connecting parts. The female and male connecting parts of two adjacent snake-bone segments are joined together to form a rotating joint, allowing two adjacent snake-bone segments 1 to rotate relative to each other.

[0026] The front and rear end faces of the snake segment 1 are inclined (the midline of the front and rear end faces is not parallel to the axis of the snake segment 1), while the front and rear end faces are parallel. A female connecting part is provided on the side wall of one end face of the snake segment 1. The female connecting part includes a circular protrusion 11 and a claw 12. The end of the circular protrusion 11 is circular and located inside the claw 12. The claw 12 is arc-shaped. The end of the circular protrusion 11 and the claw 12 are concentric. A concave arc-shaped groove I is formed between the circular protrusion 11 and the claw 12.

[0027] The circular protrusion 11 and the snake joint have a connecting section, and the claw 12 has an opening at the end away from the snake joint 1. This opening is used to accommodate the connecting section between the sub-connecting part and the snake joint when the sub-connecting parts are fitted together, so that the sub-connecting parts and the female-female connecting parts can rotate relative to each other.

[0028] The centerline of the circular protrusion 11, the centerline of the claw 12, and the centerline of the end face of the snake segment 1 are all inclined in the same direction. The connecting section between the circular protrusion 11 and the snake segment, and the opening of the claw 12 are all deviated from the axis of the snake segment 1. Specifically, with the axis of the snake segment 1 as a reference, the right side of the front end face of the snake segment 1 (lower side in the figure) is obliquely cut, the centerline of the front end face of the snake segment 1 is inclined to the right to form an inclined surface, the centerline of the circular protrusion 11 is inclined to the right side of the snake segment 1, and the opening of the claw 12 is inclined to the right side of the axis of the snake segment 1.

[0029] The other inclined end of the snake joint 1 has a support lug 13 on its side wall. The support lug 13 is an annular lug with a notch, which accommodates the connecting section between the female connector and the snake joint 1. Inside the support lug 13, a circular groove is formed that fits over the circular protrusion 11. Outside the support lug 13, an arc-shaped groove II is formed between the support lug 13 and the snake joint 1, which is an inward groove. The circular groove and the arc-shaped groove II are concentric. Similarly, the notch of the support lug 13 is inclined in the same direction as the centerline of the end face of the snake joint 1.

[0030] When two adjacent snake bone segments 1 are connected, the end of the circular protrusion 11 is fitted into the circular groove of the support ear 13, the claw 12 is fitted into the arc groove II, and the annular support ear 13 is fitted into the arc groove I, so that the two adjacent snake bone segments 1 are rotated and connected.

[0031] like Figure 3 When the snake bone is in a straight state, due to the inclined surface setting, the left side of the rear snake bone segment 1 (upper side in the figure) increases the length of the claw 12 extending into the arc-shaped groove II of the front snake bone segment 1. Similarly, the right side of the front snake bone segment 1 increases the length of the branch ear 13 extending into the annular groove I of the rear snake bone segment 1, thereby increasing the stability of the snake bone chain in the straight state.

[0032] like Figure 4 When the snake chain deflects to the left, due to the tilt of the right rear end face of the anterior snake segment 1, the length of the auricle 13 of the anterior snake segment 1 extending into the right front section of the annular groove I of the posterior snake segment 1 increases (relative to the symmetrically arranged embracing structure), and the length of the overlapping part of the auricle 13 and the claw 12 on the right side increases.

[0033] Similarly, when the snake chain deflects to the right, the length of the claw 12 located on the left front side of the posterior snake segment 1 extending into the left rear section of the annular groove II increases, and the length of the overlapping part of the claw 12 and the lug 13 increases (relative to the symmetrically arranged encircling structure). This effectively prevents the connection between the posterior and posterior snake segments 1 from loosening and improves stability.

[0034] like Figure 5 Each of the two sides of the end face of the snake-bone segment 1 is provided with a latch 4 and a groove 5, respectively. The width direction of the latch 4 and the groove 5 is consistent with the rotational axis direction of the male and female connecting parts. When the front and rear snake-bone segments 1 are joined, the latch 4 is located exactly within the groove 5, restricting the degree of freedom of movement of the snake-bone segment 1 along the axial direction of the male and female connecting parts, preventing misalignment and separation between the snake-bone segments 1, and ensuring that each segment can be tightly connected during rotation. Figure 8Using plane L2, which is perpendicular to the axis of the snake joint and coplanar with the axis of the rotation joint, as a reference, under normal circumstances, the front and rear end faces of the snake joint 1 are parallel to plane L2. When the snake chain bends, the buckle 4 will form a significant protrusion, occupying the internal space of the snake chain. By tilting the buckle 4 and the slot 5, they are located on the left and right sides of plane L2, respectively. In other words, the buckle 4 and the slot 5 are offset relative to plane L2. Therefore, when the snake chain bends at the same angle, the buckle 4 occupies less internal space in the snake chain, avoiding the formation of a protruding structure and eliminating the impact on other internal conduits of the snake chain. Figure 6 , Figure 7 The snake bone segment 1 has a traction wire channel 8 inside.

[0035] Example 2: A snake-bone chain, formed by splicing the snake-bone segments 1 from end to end in Example 1. The head segment 6 of the snake-bone chain is provided with a traction wire channel 8. Several snake-bone segments of the snake-bone chain have traction wire channels 8 inside. Snake-bone segments 1 with traction wire channels 8 are spaced apart. Every few segments, there is a snake-bone segment 1 containing a traction wire channel so that the traction wire can pass through. A traction wire channel 8 is also reserved at the head of the snake-bone chain for fixing and riveting the traction wire.

Claims

1. An endoscope snake structure comprising a snake bone joint (1), two end faces of the snake bone joint (1) are respectively provided with a female connecting part and a male connecting part, characterized in that, The end surface middle line, the female connecting part and the male connecting part of the snake bone joint (1) are inclined in the same direction, and the female connecting part and the male connecting part of the adjacent snake bone joint are sleeved to form a rotary joint.

2. The endoscopic snake structure according to claim 1, wherein, The two end surfaces of the snake bone joint (1) are respectively provided with a buckling part (4) and a clamping groove (5) capable of being inserted, and the buckling part (4) and the clamping groove (5) are symmetrically arranged at the two ends in the radial direction of the snake bone joint (1).

3. The endoscopic snake structure of claim 2, wherein, The width direction of the buckling part (4) and the clamping groove (5) is consistent with the axis direction of the rotary joint formed by the female connecting part and the male connecting part.

4. The endoscopic snake structure of claim 1, wherein, The female connecting part comprises a circular protruding part (11) and an arc-shaped clamping claw (12) arranged inside and outside, the end of the circular protruding part (11) and the clamping claw (12) are arranged at the same center, and a first arc-shaped groove for sleeving the male connecting part is formed between the circular protruding part (11) and the clamping claw (12).

5. The endoscopic snake structure according to claim 4, wherein, The female connecting part and the snake bone joint (1) have a first connecting section, the end of the clamping claw (12) has an opening for accommodating the first connecting section, and the connecting section between the circular protruding part (11) and the snake bone joint and the opening are both deviated from the axis of the snake bone joint (1).

6. The endoscopic snake bone structure according to claim 1, wherein, The male connecting part comprises a ring-shaped supporting lug (13), and a circular groove and a second arc-shaped groove for sleeving the female connecting part are respectively formed between the inside of the supporting lug (13), the outside of the supporting lug and the snake bone joint.

7. The endoscopic snake structure according to claim 5, wherein, The male connecting part and the snake bone joint (1) have a second connecting section, the end of the supporting lug (13) has a notch for accommodating the second connecting section, and the connecting section between the supporting lug (13) and the snake bone joint and the notch are both deviated from the axis of the snake bone joint (1).

8. The endoscopic snake bone structure according to claim 1, wherein, The male connecting part and the female connecting part are symmetrically arranged at the two ends in the radial direction of the snake bone joint (1).

9. The endoscopic snake bone structure according to claim 1, wherein, The snake bone joint (1) is internally provided with a traction wire channel (8).

10. A serpentine chain, characterized by The snake bone joint (1) is formed by the first snake bone joint (1) of any one of claims 1 to 9.

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