Ultra-long bent angle structure of endoscope

Abstract

The utility model belongs to the technical field of endoscopes, and particularly relates to a super-long bent angle structure of an endoscope. Comprising a snake bone formed by sequentially hinging a plurality of snake bone joints; the camera end part is arranged at the far end of the snake bone; the insertion tube is arranged at the near end of the snake bone; the traction line is circumferentially arranged in the snake bone and penetrates through a traction hole in the inner wall of the snake bone, one end of the traction line is connected with one snake bone joint located at the far end, and the other end of the traction line is connected with a traction driving mechanism; wherein each pull wire is formed by connecting two steel wire ropes with different rigidities end to end. According to the snake bone joint, the two steel wire ropes with different rigidities are connected end to end to form the pull wire, and the rigidity can be reduced by selecting the thinner steel wire rope, so that the bending angle of the snake bone joint is increased.

Description

TECHNICAL FIELD

[0001] The utility model belongs to endoscope technical field, especially relate to a super long angle of bend structure of endoscope. BACKGROUND

[0002] Endoscope is a kind of medical and industrial detection instrument that is applied very widely, and the bending part thereof is bent and changed direction by pulling a plurality of snake bone joints connected with each other by steel wire rope.The steel wire rope is connected to the inner side of the snake bone joint by a connecting structure to realize the traction of the snake bone joint, and the adjacent snake bone joints are hinged to each other to realize relative rotation.

[0003] However, when the existing bending part structure pulls the snake bone joint by the traction steel wire rope, the same steel wire rope is used from the distal end connected to the snake bone joint to the proximal end connected to the traction driving mechanism. Generally, the rigidity of the steel wire rope is related to its diameter, and the greater the diameter, the higher the rigidity, and the smaller the diameter, the smaller the rigidity. The traction steel wire rope is mostly a slightly thicker steel wire rope with the same diameter specification, and since the slightly thicker steel wire rope has greater rigidity, when the snake bone joint is bent, the resistance to bending of the steel wire rope increases, thereby increasing the tension of the steel wire rope and limiting the bending angle of the snake bone joint, so that the super long angle of bend function cannot be realized. SUMMARY

[0004] The utility model aims at providing a super long angle of bend structure of endoscope, which is composed of two steel wire ropes with different rigidity connected end to end to form a traction line, and the selection of a low rigidity steel wire rope, i.e., a thinner steel wire rope, can reduce the rigidity and increase the bending angle of the snake bone joint.

[0005] To solve the above technical problems, the utility model provides a super long angle of bend structure of endoscope, which comprises:

[0006] a snake bone formed by a plurality of snake bone joints hinged in sequence;

[0007] a camera end part arranged at the distal end of the snake bone;

[0008] an insertion tube arranged at the proximal end of the snake bone;

[0009] a traction line arranged circumferentially inside the snake bone and passing through a traction hole on the inner wall of the snake bone, one end of the traction line being connected to one snake bone joint at the distal end, and the other end of the traction line being connected to a traction driving mechanism;

[0010] wherein each traction line is composed of two steel wire ropes with different rigidity connected end to end.

[0011] Preferably, the two steel wire ropes with different stiffnesses include a high-stiffness steel wire rope and a low-stiffness steel wire rope; the distal end of the high-stiffness steel wire rope is connected to the proximal end of the low-stiffness steel wire rope.

[0012] Preferably, the number of traction lines arranged circumferentially is two or four.

[0013] Preferably, it also includes a spring tube, which is located inside the insertion tube and is sleeved outside the traction line.

[0014] Preferably, it also includes a connecting terminal, through which the connecting ends of the high-stiffness steel wire rope and the low-stiffness steel wire rope are welded together.

[0015] Preferably, the low-stiffness steel wire rope passes through the snake bone and through the traction hole, and the spring tube is sleeved on the outside of the high-stiffness steel wire rope.

[0016] Compared with the prior art, this utility model has the following advantages:

[0017] This utility model is designed to form a traction line by connecting two steel wire ropes with different rigidities end to end. Choosing a low-rigidity steel wire rope, i.e. a thinner steel wire rope, can reduce rigidity, thereby increasing the bending angle of the snake joint to achieve the function of ultra-long bending angle. Attached Figure Description

[0018] Fig. 1 This is a three-dimensional view of an endoscope with an ultra-long curved angle structure according to the present invention.

[0019] Fig. 2 This is a cross-sectional view of an ultra-long curved structure of an endoscope according to this utility model.

[0020] Fig. 3 This is a magnified view of a portion of the traction wire structure in this utility model.

[0021] In the diagram: 1-snake bone, 11-snake bone joint, 12-traction hole, 2-camera end, 3-insertion tube, 4-traction line, 41-high stiffness steel wire rope, 42-low stiffness steel wire rope, 43-connecting terminal, 5-spring tube. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0023] like Figs. 1-3 As shown, this utility model embodiment specifically provides an ultra-long bend structure for an endoscope, including:

[0024] The snake bone 1 is formed by a plurality of snake joints 11 connected in sequence by hinges;

[0025] The camera end 2 is arranged at the distal end of the snake bone 1;

[0026] The insertion tube 3 is arranged at the proximal end of the snake bone 1;

[0027] The traction line 4 is arranged circumferentially inside the snake bone 1 and passes through the traction hole 12 on the inner wall of the snake bone 1. One end of the traction line 4 is connected to one snake joint 11 at the distal end, and the other end of the traction line 4 is connected to the traction driving mechanism.

[0028] Each traction line 4 is composed of two steel wires of different rigidity connected end to end. The two steel wires of different rigidity include a high-rigidity steel wire 41 and a low-rigidity steel wire 42. The distal end of the high-rigidity steel wire 41 is connected to the proximal end of the low-rigidity steel wire 42, so that the proximal end of the low-rigidity steel wire 42 is close to the camera end 2. Because the rigidity of the traction steel wire is large, when trying to bend the snake joint 11, the force of the steel wire resisting bending will increase, thereby limiting the bending angle of the snake joint 11. Therefore, by selecting a thinner steel wire, i.e. the low-rigidity steel wire 42, in combination with a thicker steel wire, i.e. the high-rigidity steel wire 41, the rigidity can be reduced, thereby increasing the bending angle of the snake joint 11.

[0029] The number of circumferentially arranged traction lines 4 is two or four to realize bending of the snake bone 1 in multiple directions.

[0030] It also includes a spring tube 5, which is located inside the insertion tube 3 and is sleeved outside the traction line 4 to provide a limiting and guiding function for the traction line 4 when traction is performed.

[0031] It also includes a connection terminal 43 for welding the connection end of the high-rigidity steel wire 41 and the low-rigidity steel wire 42 to enhance the structural strength and stability of the connection between the two.

[0032] The low-rigidity steel wire 42 passes through the inside of the snake bone 1 and passes through the traction hole 12. The spring tube 5 is sleeved outside the high-rigidity steel wire 41. Because the low-rigidity steel wire 42 is longer than the snake bone 1 itself, when the snake bone 1 is bent, the low-rigidity steel wire 42 can be stretched or relaxed to a certain extent, thereby allowing the snake bone 1 to achieve a larger bending angle. When the length of the low-rigidity steel wire 42 is greater than that of the snake bone 1, stress can be more evenly distributed on the low-rigidity steel wire 42, thereby reducing stress concentration at the connection point of the low-rigidity steel wire 42 and the snake bone 1 to prolong the service life.

[0033] The above description is only the description of the preferred embodiment of the utility model, and does not limit the utility model in any way, and any change and modification of the utility model according to the above disclosure by the ordinary skilled in the art of the utility model belongs to the protection scope of the claims.

Claims

1. An ultralong angulation structure of an endoscope, characterized by, The utility model relates to a kind of snake bone and its traction drive mechanism, including: Snake bone (1) is formed by a plurality of snake bone joints (11) articulated in turn; Camera end (2) is arranged at the distal end of the snake bone (1); Insertion tube (3) is arranged at the proximal end of the snake bone (1); Traction line (4) is circumferentially arranged inside the snake bone (1), and passes through traction hole (12) on the inner wall of the snake bone (1), one end of the traction line (4) is connected with one of the snake bone joints (11) at the distal end, and the other end of the traction line (4) is connected with traction drive mechanism; Wherein, each traction line (4) is composed of two steel wire ropes with different rigidity connected head to tail.

2. The super-angled bend structure of an endoscope according to claim 1, wherein The two steel wire ropes with different rigidity include high rigidity steel wire rope (41) and low rigidity steel wire rope (42);The distal end of the high rigidity steel wire rope (41) is connected with the proximal end of the low rigidity steel wire rope (42).

3. The super-angled bend structure of an endoscope according to claim 1, wherein The number of circumferential arrangement of the traction line (4) is two or four.

4. The super-angled bend structure of an endoscope according to claim 2, wherein It also includes spring tube (5), the spring tube (5) is in the insertion tube (3), and the spring tube (5) is sleeved outside the traction line (4).

5. The super-angled bend structure of an endoscope according to claim 2, wherein It also includes connecting terminal (43), the connecting terminal (43) is used for fixedly connecting the connecting end of the high rigidity steel wire rope (41) and the low rigidity steel wire rope (42).

6. The super-angled bend structure of an endoscope according to claim 4, wherein The low rigidity steel wire rope (42) penetrates through the snake bone (1) and passes through traction hole (12), and the spring tube (5) is sleeved outside the high rigidity steel wire rope (41).

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