Middle section pipe of endoscope snake bone

Abstract

The utility model relates to a middle section pipe of an endoscope snake bone, which comprises a middle section pipe body and is characterized in that a pair of symmetrically arranged first connecting lugs and a pair of symmetrically arranged second connecting lugs respectively extend out of pipe orifices at two ends of the middle section pipe body, a shaft hole is arranged on each first connecting lug, and a shaft hole is arranged on each second connecting lug. And a rotating shaft hook perpendicular to the second connecting lug is arranged on the second connecting lug. The multi-point positioning device is easy to process, and the snake bone assembled with the snake bone front section pipe and the snake bone rear section pipe has multi-point positioning, so that the positioning precision is high, the rotation is flexible, and the bending angle is reliable.

Description

Technical Field

[0001] This utility model relates to a middle section tube, specifically to a middle section tube of an endoscope snake bone, belonging to the field of endoscope technology. Background Technology

[0002] Existing endoscopes have a built-in snake bone in the head. By pulling the control line connected to it, the snake bone can bend in two directions or in four directions (up, down, left, and right), thereby achieving bending and changing direction of the endoscope head.

[0003] Existing serpentine endoscopes include riveted or expanded-joint structures. The serpentine structure comprises a curved main body consisting of several interconnected middle sections, with front and rear sections at its ends. However, in riveted serpentine endoscopes, improper adjustment of the stamping machine or incorrect installation of the riveting die can lead to bending and deformation of the rivet shafts during riveting to the front and rear sections. This results in inflexible rotation of the serpentine endoscope, low yield, and rivet head detachment due to undersized rivet heads. Furthermore, the curved section of the endoscope is prone to malfunction or renders the endoscope unusable. The snake-like structure of the expansion joint has bosses and boss-groove structures at both ends of the middle section tubes. Several middle sections are connected by a connecting structure formed by the bosses and boss-grooves or by a connecting structure formed by ball joints and sockets to form a curved body. The curved body is connected to the front and rear sections. Since the structure formed by the bosses and boss-grooves only has three positioning points, the bend angle of the snake-like structure will be offset, resulting in poor accuracy. Although the connecting structure formed by the ball joints and sockets can ensure that different sections can rotate flexibly, the rotational friction area is large, and this connecting structure is a five-point positioning, which also has relatively low positioning accuracy. Summary of the Invention

[0004] The purpose of this invention is to provide a middle section tube of an endoscopic snake that is not only easy to process, but also has multi-point positioning after being assembled with the anterior and posterior sections of the snake bone, resulting in high positioning accuracy, flexible rotation, and reliable bending angles.

[0005] To achieve the above objectives, the technical solution of this utility model is: a middle segment tube of an endoscopic snake skeleton, comprising a middle segment tube body, the innovation of which lies in:

[0006] A pair of symmetrically arranged first connecting ears and a pair of symmetrically arranged second connecting ears extend from the pipe openings at both ends of the middle section pipe body. The first connecting ears are provided with shaft holes, and the second connecting ears are provided with rotating shaft hooks arranged perpendicular to them.

[0007] In the above technical solution, the first connecting lug of the middle section tube body has a semi-circular through hole and a spring piece formed by wire cutting, and the shaft hole is a circular shaft hole formed by the combination of the semi-circular through hole and the semi-circular through hole formed by machining on the spring piece.

[0008] In the above technical solution, the first connecting ear and the second connecting ear of the middle section tube body are arranged in a straight line.

[0009] In the above technical solution, the first connecting ear and the second connecting ear of the middle section tube body are arranged in a cross shape.

[0010] In the above technical solution, two or four rope holes are provided on the peripheral wall of the middle section tube body along its circumferential direction.

[0011] In the above technical solution, two or four rope-blocking plates are cut into the peripheral wall of the middle section tube body and extruded into an arc-shaped structure towards the axial direction of the middle section tube body to construct the corresponding rope-threading holes.

[0012] In the above technical solution, the rotating shaft hook includes a rotating shaft and a hook that are machined, bent and formed into one piece.

[0013] In the above technical solution, the outer diameter of the middle part of the middle section tube body is larger than the outer diameter of the first connecting ear and the second connecting ear extending from both ends.

[0014] The positive effects of this utility model are as follows: After adopting the middle section tube of the endoscopic snake skeleton of this utility model, since a pair of symmetrically arranged first connecting ears and a pair of symmetrically arranged second connecting ears extend from the tube openings at both ends of the middle section tube body, the first connecting ears are provided with shaft holes, and the second connecting ears are provided with rotating shaft hooks arranged perpendicular to them. During the snake skeleton assembly process, several middle sections are connected as a whole to form a curved body. Specifically, the rotating shaft hook of one of the two adjacent middle sections is inserted into the shaft hole of the other middle section and rotates in cooperation. The front section tube and the rear section tube, which are respectively connected to the head and tail of the curved body, are connected by corresponding rotating shaft hooks and shaft holes. This utility model is not only easy to process, but also the snake skeleton assembled with the front and rear section tubes has multi-point positioning, which can not only ensure the rapid assembly of each section tube and the stability of the connection, but also make its positioning accuracy high, its rotation flexible, and its bending angle more reliable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the first specific embodiment of this utility model;

[0016] Figure 2 yes Figure 1 A top-down view;

[0017] Figure 3 yes Figure 1 A diagram showing the view from the right.

[0018] Figure 4 yes Figure 1 Assembly diagram;

[0019] Figure 5 This is a schematic diagram of the structure of the second specific embodiment of this utility model;

[0020] Figure 6 yes Figure 5 A top-down view;

[0021] Figure 7 yes Figure 5 A diagram showing the view from the right.

[0022] Figure 8 yes Figure 5 Assembly diagram. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and the given embodiments, but it is not limited thereto.

[0024] Example 1

[0025] like Figure 1 , 2 As shown in Figures 3 and 4, a middle segment of an endoscope with bidirectional serpentine structure includes a middle segment body 1.

[0026] At the two ends of the middle section tube body 1, a pair of symmetrically arranged first connecting ears 11 and a pair of symmetrically arranged second connecting ears 12 extend respectively. The first connecting ears 11 are provided with shaft holes 13, and the second connecting ears 12 are provided with rotating shaft hooks 14 arranged perpendicular to them.

[0027] like Figure 2 As shown, to facilitate rapid assembly of multiple middle sections and with the front and rear sections, the first connecting lug 11 of the middle section body 1 has a semi-circular through hole and a spring piece 15 formed by wire cutting. The shaft hole 13 is a circular shaft hole formed by the mating of the semi-circular through hole and the semi-circular through hole formed by machining the spring piece 15. Specifically, during the assembly process of the rotating shaft hook 14 of one section with the shaft hole 13 of the adjacent section, the spring piece 15 will be pushed outward by the action of the rotating shaft hook 14, so that the rotating shaft hook can be quickly inserted into the shaft hole, and the spring piece will automatically reset after engagement.

[0028] like Figure 2 As shown, when used in a two-way snake bone, the first connecting ear 11 and the second connecting ear 12 of the middle section tube body 1 are arranged in a straight line to ensure that the two-way snake bone bends in both directions to form a bend.

[0029] Furthermore, such as Figure 3 As shown, in order to facilitate the threading of the traction rope and to be applicable to two-way bends, two rope-threading holes 16 are provided on the peripheral wall of the middle section tube body 1 along its circumferential direction.

[0030] Furthermore, such as Figure 3 As shown, in order to process the rope hole without increasing the outer diameter, two rope-blocking plates 17 are cut out on the peripheral wall of the middle section tube body 1 and extruded into an arc-shaped structure towards the axial direction of the middle section tube body to construct the corresponding rope hole 16.

[0031] Furthermore, such as Figure 1 As shown, in order to quickly machine the structure of the rotating shaft hook and ensure machining accuracy, the rotating shaft hook 14 includes a rotating shaft 141 and a hook 142 that are machined, bent and formed into one piece.

[0032] Furthermore, such as Figure 1 As shown, in order to ensure that the overall outer diameter does not increase after multiple tube segments are assembled, and to prevent interference between adjacent tube segments, the outer diameter of the middle part of the middle tube body 1 is larger than the outer diameter of the first connecting ear 11 and the second connecting ear 12 extending from both ends.

[0033] During assembly in Example 1, as follows Figure 4 As shown, when multiple tube segments are assembled, during the assembly process of the rotating shaft hook 14 of one tube segment and the shaft hole 13 of the adjacent next tube segment, the spring piece 15 on the next tube segment will be pushed outward by the rotating shaft hook 14 of the previous tube segment, so that the rotating shaft hook can be quickly inserted into the shaft hole. After the two tube segments are engaged, the spring piece will automatically reset. Of course, after the snake bone is assembled, an elastic ring can be fitted around the outer periphery of the spring piece. In this way, when the snake bone is bent, the deformation of the spring piece can be effectively avoided.

[0034] Example 2

[0035] like Figure 5 , 6 As shown in Figures 7 and 8, a middle segment of an endoscope with a four-directional serpentine structure includes a middle segment body 1.

[0036] The two ends of the middle section tube body 1 extend out a first connecting ear 11 and a second connecting ear 12 arranged symmetrically. The first connecting ear 11 is provided with a shaft hole 13, and the second connecting ear 12 is provided with a rotating shaft hook 14 arranged perpendicular to it.

[0037] like Figure 6As shown, to facilitate rapid assembly of multiple middle sections and with the front and rear sections, the first connecting lug 11 of the middle section body 1 has a semi-circular through hole and a spring piece 15 formed by wire cutting. The shaft hole 13 is a circular shaft hole formed by the mating of the semi-circular through hole and the semi-circular through hole formed by machining the spring piece 15. Specifically, during the assembly process of the rotating shaft hook 14 of one section with the shaft hole 13 of the adjacent section, the spring piece 15 will be pushed outward by the action of the rotating shaft hook 14, so that the rotating shaft hook can be quickly inserted into the shaft hole, and the spring piece will automatically reset after engagement.

[0038] like Figure 5 , 6 As shown, when used in a four-way snake-bone configuration, the first connecting lug 11 and the second connecting lug 12 of the middle segment tube body 1 are arranged in a cross shape. This allows the next segment tube to rotate 90° during assembly of adjacent segments.

[0039] Then it is assembled with the previous section to ensure that the four-way snake bone bends in the four directions of up, down, left and right to form corresponding bends.

[0040] Furthermore, such as Figure 7 As shown, in order to facilitate the threading of the traction rope and to be applicable to four-way bends, four rope-threading holes 16 are provided on the peripheral wall of the middle section tube body 1 along its circumferential direction.

[0041] Furthermore, such as Figure 7 As shown, in order to process the rope hole without increasing the outer diameter, four rope-blocking plates 17 are cut into the peripheral wall of the middle section tube body 1 and extruded into an arc-shaped structure towards the axial direction of the middle section tube body to construct the corresponding rope hole 16.

[0042] Furthermore, such as Figure 6 As shown, in order to quickly machine the structure of the rotating shaft hook and ensure machining accuracy, the rotating shaft hook 14 includes a rotating shaft 141 and a hook 142 that are machined, bent and formed into one piece.

[0043] Furthermore, such as Figure 5 , 6 As shown, in order to ensure that the overall outer diameter does not increase after multiple tube segments are assembled, and to prevent interference between adjacent tube segments, the outer diameter of the middle part of the middle tube body 1 is larger than the outer diameter of the first connecting ear 11 and the second connecting ear 12 extending from both ends.

[0044] During assembly in Example 2, as follows Figure 8As shown, during the assembly of multiple segments, when the rotating shaft hook 14 of one segment is assembled with the shaft hole 13 of the adjacent subsequent segment, after the subsequent segment rotates 90°, the spring piece 15 of that segment will be pushed outward by the rotating shaft hook 14 of the preceding segment, allowing the rotating shaft hook to quickly engage with the shaft hole. After the two segments are engaged, the spring piece will automatically return to its original position. Of course, after the snake-like structure is assembled, an elastic ring can be fitted around the outer periphery of the spring piece, which can effectively prevent the spring piece from deforming when the snake-like structure bends.

[0045] In summary, during the snake-bone assembly process, several middle sections are connected as a whole to form the bending body. Specifically, the rotating hook of the first middle section of two adjacent middle sections is inserted into the shaft hole of the second middle section and rotates in fit. The front and rear sections, which are respectively connected to the head and tail of the bending body, are connected through corresponding rotating hooks and shaft holes. The rotating hooks and corresponding shaft holes of the assembled snake-bone are directly inserted into the assembly structure without gaps. This not only provides good positioning and high precision, but also flexible rotation and low production cost. Unlike existing riveted snake-bone technologies, where tight riveting can cause high resistance to rotation at the bend angle.

[0046] The snake skeleton assembled using this invention employs a six-point positioning method for the rotating shaft hook and shaft hole mating structure. This not only provides multiple positioning points, ensuring reliable positioning, but also guarantees reliable bending angles. This invention is not only easy to process, but the snake skeleton assembled with the front and rear sections also features multi-point positioning. This ensures rapid assembly of each section and stable connection, resulting in high positioning accuracy, flexible rotation, and more reliable bending angles.

[0047] 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. A middle segment of an endoscopic snake skeleton, comprising a middle segment body (1), characterized in that: At the two ends of the middle section tube body (1), a pair of symmetrically arranged first connecting ears (11) and a pair of symmetrically arranged second connecting ears (12) extend respectively. The first connecting ears (11) are provided with shaft holes (13), and the second connecting ears (12) are provided with rotating shaft hooks (14) arranged perpendicular to them. The first connecting ear (11) of the middle section tube body (1) has a semi-circular through hole and a spring piece (15) formed by wire cutting. The shaft hole (13) is a circular shaft hole formed by the combination of the semi-circular through hole and the semi-circular through hole formed by machining on the spring piece (15).

2. The middle segment of the endoscopic snake bone according to claim 1, characterized in that: The first connecting ear (11) and the second connecting ear (12) of the middle section tube body (1) are arranged in a straight line.

3. The middle segment of the endoscopic snake bone according to claim 1, characterized in that: The first connecting ear (11) and the second connecting ear (12) of the middle section tube body (1) are arranged in a cross shape.

4. The middle segment of the endoscopic snake bone according to claim 1, characterized in that: The middle section tube body (1) has two or four rope holes (16) on its peripheral wall along its circumference.

5. The middle segment of the endoscopic snake bone according to claim 4, characterized in that: Two or four rope-blocking plates (17) are cut out on the peripheral wall of the middle section tube body (1) and extruded into an arc-shaped structure in the direction of the axis of the middle section tube body to form corresponding rope holes (16).

6. The middle segment of the endoscopic snake bone according to claim 1, characterized in that: The rotating shaft hook (14) includes a rotating shaft (141) formed by machining and bending and connected as one piece, and a hook (142).

7. The middle segment of the endoscopic snake bone according to claim 1, characterized in that: The outer diameter of the middle part of the middle section tube body (1) is greater than the outer diameter of the first connecting ear (11) and the second connecting ear (12) extending from both ends.

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