Deflection snake bone

Abstract

The utility model discloses a deflection snake bone. The deflection snake bone is at least used in cooperation with an endoscope and comprises a deflection chain body. The deflection chain body comprises at least three deflection joints which are sequentially connected, every two adjacent deflection joints are rotationally connected through a rotating structure, and the deflection chain body has a first state in which the deflection chain body is linearly arranged and a second state in which the deflection chain body is bent to be in a spiral line shape. When the deflection chain body is in the first state, the rotating axes of the multiple rotating structures incline to the extending direction of the deflection chain body and are parallel to one another; or the rotating axes of the multiple rotating structures are all perpendicular to the extending direction of the deflection chain body and are arranged in a spiral shape. The utility model at least solves the problems that the visual field is easy to block when the snake bone deflects and the snake bone deflects unreliably.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, in particular to a deflection snake bone. Background Art

[0002] Currently, most commonly used snake bones on the market lack deflection capabilities, meaning that the rotational axes of each joint remain in the same plane during bending. However, this bending method results in the head end of the snake bone being obscured by its tail or other supporting tubing behind it after a certain angle, significantly hindering the surgeon's operation.

[0003] There are also snake bones on the market that achieve deflection by changing the rotation axis of a single joint. However, because snake bones are multi-jointed, with gaps between the joints, relying solely on a single joint to achieve deflection is clearly unreliable. Furthermore, the end joints of the snake bone are long, and due to the gaps between the joints, the joints at the ends of the snake bone cannot remain in the same horizontal plane and will sag toward gravity. If the deflection direction at this time deflects in the direction opposite to gravity, gravity will easily interfere with the snake's deflection, resulting in inaccurate deflection. Utility Model Content

[0004] The main purpose of the utility model is to provide a deflecting snake bone, which at least solves the problems that the field of view is easily blocked when the snake bone is deflected and the snake bone deflection is unreliable.

[0005] According to one aspect of the present invention, a deflection snake bone is provided, wherein the deflection snake bone is used at least in conjunction with an endoscope, and the deflection snake bone comprises:

[0006] The deflection chain comprises at least three sequentially connected deflection segments, wherein two adjacent deflection segments are rotationally connected via a rotating structure. The deflection chain has a first state in which it is arranged in a straight line and a second state in which it is arranged in a spiral line. When the deflection chain is in the first state:

[0007] The rotation axes of the plurality of rotating structures are all inclined to the extension direction of the deflection chain and are parallel to each other; or,

[0008] The rotation axes of the plurality of rotating structures are perpendicular to the extension direction of the deflection chain and are arranged in a spiral shape.

[0009] Furthermore, the deflection link comprises a first deflection joint and a second deflection joint that are adjacently arranged;

[0010] The rotating structure includes a connecting block and a connecting slot, one of the connecting block and the connecting slot is provided at the first deflection segment, and the other is provided at the second deflection segment;

[0011] Wherein, the connecting block includes a rotating part and a limiting part connected to the rotating part, the connecting groove includes a rotating groove and a limiting groove connected to the rotating groove, the rotating part is rotatably arranged in the rotating groove, and the limiting part is swingably connected to the limiting groove.

[0012] Furthermore, the rotating portion and the rotating groove are both arranged in a circular shape, the limiting groove and the limiting portion are both arranged in an arc shape, the center of the arc is consistent with the center of the circle, and along the extension direction of the limiting groove, the limiting groove is longer than the limiting length by w, wherein 0mm<w≤0.5mm.

[0013] Furthermore, the first deflectable segment and the second deflectable segment each comprise an annular structure, one end of the annular structure is provided with one or two connecting blocks, the other end of the annular structure is provided with one or two connecting grooves, and the connecting blocks and the connecting grooves are provided in a one-to-one correspondence;

[0014] Wherein, when there are two connecting blocks, the two connecting blocks are symmetrically arranged on opposite sides of the corresponding deflection joints, and the connecting blocks on two adjacent deflection joints are staggered along the circumferential direction of the deflection chain body, so that when the deflection chain body is in the first state, the rotation axes of the multiple rotating structures are perpendicular to the extension direction of the deflection chain body and are arranged in a spiral shape; or,

[0015] When there are two connecting blocks, the two connecting blocks are arranged on opposite sides of the corresponding deflection joint, and the two connecting blocks on the same deflection joint are staggered along the length direction of the deflection chain body, so that when the deflection chain body is in the first state, the rotation axes of the multiple rotating structures are all inclined to the extension direction of the deflection chain body and parallel to each other.

[0016] Furthermore, the deflection chain body includes a first deflection segment and a second deflection segment arranged adjacent to each other, a limiting groove is provided on one of the first deflection segment and the second deflection segment, and a limiting protrusion that is gap-matched with the limiting groove is provided on the other of the two, and the limiting protrusion and the limiting groove both extend along the length direction of the deflection chain body.

[0017] Furthermore, the deflection link comprises an avoidance gap, which is arranged between two adjacent deflection joints and located on both sides of the rotating structure.

[0018] Furthermore, a first wire passing hole and a second wire passing hole are respectively provided on opposite sides of the deflection chain body, and a pull wire is provided in each of the first wire passing hole and the second wire passing hole. One end of the pull wire is fixedly connected to the first end of the deflection chain body, and the other end of the pull wire passes through the second end of the deflection chain body. The pull wire is at least used to drive the deflection chain body to switch between the first state and the second state.

[0019] Furthermore, the deflection chain includes a first deflection segment and a second deflection segment arranged adjacent to each other, and the first side of at least one of the first deflection segment and the second deflection segment is provided with the first wire hole, and the second side of at least one of the two, which is opposite to the first side, is provided with the second wire hole.

[0020] Furthermore, the deflection snake bone also includes a skull, which is connected to the first end of the deflection chain body through the rotating structure. First connecting parts are provided on opposite sides of the skull, and the pull wire is fixedly connected to the first connecting part.

[0021] Furthermore, the deflection snake bone also includes a main chain segment, which is arranged at the second end of the deflection chain body and connected to the deflection chain body through the rotating structure. The rotation axes of each rotating structure of the main chain segment are perpendicular to the central axis of the main chain segment, and the rotation axes of each rotating structure are parallel to each other.

[0022] Furthermore, the deflection snake bone also includes a coccyx, which is arranged at the end of the main chain segment away from the deflection chain body and is connected to the main chain segment through the rotating structure. The end of the coccyx away from the main chain segment is provided with a second connecting part, and the second connecting part is at least used to connect the coccyx to the base of the endoscope.

[0023] In the present invention, when the deflection chain is in the first state, the rotation axes of the multiple rotating structures of the deflection chain can be inclined relative to the extension direction of the deflection chain and parallel to each other, or can be perpendicular to the extension direction of the deflection chain and arranged in a spiral shape. By arranging the rotation axes of the deflection chain in one of the two aforementioned arrangements, the deflection chain can be configured to exhibit a spiral climbing state in the bending direction of the deflection chain during the transition from the first state to the second state, thereby allowing the two ends of the deflection chain to be offset from each other during the bending process. When the deflection snake of the present application is used in conjunction with an endoscope, the endoscope can bend with the deflection chain and observe as the deflection chain reaches a designated position. When the deflection snake of the present application is in operation, the deflection joints of the deflection snake can rotate under the drive of an external force, thereby enabling the deflection snake to transition between the first state and the second state. Because the two ends of the deflection chain can be staggered with each other during the bending process, the embarrassing situation that the field of view of the endoscope is blocked when the endoscope is used in conjunction with the deflection snake bone is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 This is a structural diagram of the deflection snake bone disclosed in an embodiment of the present utility model;

[0026] Figure 2 This is a structural diagram of the deflection snake bone disclosed in an embodiment of the present utility model from a first perspective;

[0027] Figure 3 for Figure 2 Enlarged view of part A;

[0028] Figure 4 A structural diagram of the deflected condyle of the deflected snake bone disclosed in an embodiment of the present utility model;

[0029] Figure 5 This is a structural diagram of the deflection snake bone disclosed in the first embodiment of the present utility model when it bends in the clockwise direction;

[0030] Figure 6 This is a structural diagram of the deflection snake bone disclosed in the first embodiment of the present utility model when it bends counterclockwise;

[0031] Figure 7 This is a structural diagram of the deflection snake bone disclosed in the second embodiment of the present utility model when it bends in the clockwise direction;

[0032] Figure 8 This is a structural diagram of the deflection snake bone disclosed in the second embodiment of the present utility model when it bends counterclockwise;

[0033] Figure 9 This is a structural diagram of the deflection link of the deflection snake bone disclosed in the first embodiment of the present utility model when it is in the first state;

[0034] Figure 10 This is a structural diagram of the side surface of the deflection chain of the deflection snake disclosed in the embodiment of the present utility model, in which the rotation axes of the deflection chain are perpendicular to the extension direction of the deflection chain and are arranged in a spiral shape;

[0035] Figure 11 It is a projection diagram of two adjacent axes when the rotation axes of the deflection chain body of the deflection snake bone disclosed in the embodiment of the utility model are perpendicular to the extension direction of the deflection chain body and are arranged in a spiral shape;

[0036] Figure 12 This is an expanded structural diagram of the circumferential side surface of the deflection chain body of the deflection snake bone disclosed in an embodiment of the present utility model when the rotation axes of the deflection chain body are all inclined to the extension direction of the deflection chain body and are parallel to each other;

[0037] Figure 13 This is a structural diagram of the main chain segment of the deflection snake bone disclosed in an embodiment of the present utility model;

[0038] Figure 14 A structural diagram of a skull with a deflected snake bone disclosed in an embodiment of the present utility model;

[0039] Figure 15 This is a structural diagram of the deflected snake-bone coccyx disclosed in an embodiment of the present utility model.

[0040] The above drawings include the following reference numerals:

[0041] 10. Deflection link body; 11. Deflection joint; 111. Rotation structure; 1111. Connecting block; 11111. Rotation part; 11112. Limiting part; 1112. Connecting groove; 11121. Rotation groove; 11122. Limiting groove; 1113. Rotation axis; y, length direction; 112. Limiting groove; 113. Limiting protrusion; a, center axis; 12. Avoidance gap; 114. First wire hole; 115. Second wire hole; 20. Skull; 201. First connection part; 202. Identification hole; 203. Skull window; 204. U-shaped groove; 30. Main chain segment; 40. Coccyx; 401. Second connection part. DETAILED DESCRIPTION

[0042] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0043] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0044] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0045] In order to solve the problem that the field of view is easily blocked when the snake bone is deflected and the snake bone deflection is unreliable, according to an embodiment of the present application, a deflecting snake bone is provided. The deflecting snake bone of the present application will be described in detail below with reference to the accompanying drawings.

[0046] See also Figures 1 to 15 As shown, according to an embodiment of the present invention, a deflection snake bone is provided, which is used at least in conjunction with an endoscope (not shown in the figure). The deflection snake bone of the present application includes a deflection chain body 10.

[0047] Among them, the deflection chain body 10 includes at least three deflection joints 11 connected in sequence, and two adjacent deflection joints 11 are rotatably connected through a rotating structure 111. The deflection chain body 10 has a first state in which it is arranged in a straight line and a second state in which it is arranged in a spiral line. When the deflection chain body 10 is in the first state: the rotation axes 1113 of the multiple rotating structures 111 are all inclined to the extension direction of the deflection chain body 10 and parallel to each other; or, the rotation axes 1113 of the multiple rotating structures 111 are all perpendicular to the extension direction of the deflection chain body 10 and are arranged in a spiral shape.

[0048] In the present application, when the deflection chain 10 is in the first state, the rotation axes 1113 of the multiple rotating structures 111 of the deflection chain 10 can be inclined relative to the extension direction of the deflection chain 10 and parallel to each other, or can be perpendicular to the extension direction of the deflection chain 10 and arranged in a spiral shape. By arranging the rotation axes 1113 of the deflection chain 10 in one of the two aforementioned arrangements, the rotation axes 1113 can be arranged in a spiral shape in the bending direction of the deflection chain 10 during the transition from the first state to the second state, thereby allowing the two ends of the deflection chain 10 to stagger relative to each other during the bending process. When the deflection snake of the present application is used in conjunction with an endoscope, the endoscope can bend with the deflection chain 10 and observe as the deflection chain 10 reaches a designated position. When the deflection snake of the present application is in operation, the deflection joints 11 of the deflection snake can rotate under the drive of an external force, thereby allowing the deflection snake to switch between a first state and a second state. Because the two ends of the deflection link 10 can be staggered during the bending process, the embarrassing situation of the endoscope's field of view being blocked when the deflection snake is used in conjunction with the endoscope is avoided.

[0049] That is to say, compared with the existing deflection snake bone, the deflection snake bone of the present application adopts a deflection chain body 10 composed of multiple deflection bones 11, which can solve the problem of easy obstruction of vision and make the bending of the deflection snake bone of the present application more reliable.

[0050] Further, see Figures 1 to 3 As shown, the deflection link 10 includes a first deflection joint and a second deflection joint arranged adjacent to each other. The rotation structure 111 includes a connecting block 1111 and a connecting slot 1112. One of the connecting block 1111 and the connecting slot 1112 is arranged at the first deflection joint, and the other is arranged at the second deflection joint. The connecting block 1111 includes a rotating portion 11111 and a limiting portion 11112 connected to the rotating portion 11111. The connecting slot 1112 includes a rotating slot 11121 and a limiting slot 11122 connected to the rotating slot 11121. The rotating portion 11111 is rotatably arranged in the rotating slot 11121, and the limiting portion 11112 is swingably connected to the limiting slot 11122.

[0051] Specifically, two adjacent deflection segments are rotatably connected via a rotating structure 111, thereby forming a deflection link 10 that is not connected end to end. The rotating portion 11111 and the limiting portion 11112 are fixedly connected. Therefore, when the rotating portion 11111 rotates around the rotation axis 1113 of the rotation center in the rotation slot 11121, the limiting portion 11112 can swing within the limiting slot 11122. When the deflection snake bone of the present application is used, the deflection segments 11 of the deflection snake bone can rotate in the same direction around the rotation axis 1113 of each rotating structure 111 under the action of an external force. The rotation of each rotating structure 111 is superimposed, allowing the deflection link 10 to bend in a predetermined direction.

[0052] Further, see Figures 1 to 3 As shown, the rotating portion 11111 and the rotating groove 11121 are both arranged in a circular shape, the limiting groove 11122 and the limiting portion 11112 are both arranged in an arc shape, the center of the arc is consistent with the center of the circle, and along the extension direction of the limiting groove 11122, the limiting groove 11122 is longer than the limiting portion 11112 by w, wherein 0mm<w≤0.5mm.

[0053] Specifically, the center of the arc is consistent with the center of the circle, which makes the centers of the rotating part 11111, the rotating groove 11121, the limiting part 11112 and the limiting groove 11122 coincide with each other, and the rotating part 11111 and the limiting part 11112 are fixedly connected, and the rotating groove 11121 and the limiting groove 11122 are connected. Therefore, when the rotating part 11111 rotates a certain angle in the rotating groove 11121, the limiting part 11112 can swing a corresponding angle in the limiting groove 11122. The arc length of the limiting groove 11122 is set to be longer than the arc length of the limiting part 11112 by w in this application so that the limiting part 11112 can swing within a certain range in the limiting groove 11122. If w is greater than 0.5 mm, the swing amplitude of the limiting portion 11112 in the limiting groove 11122 is too large, which will cause the impact of the limiting portion 11112 when it swings to the extreme positions on both sides of the limiting groove 11122 to be too large, and it is easy to damage the rotating structure 111.

[0054] Further, see Figures 1 to 12 As shown, the first deflection joint and the second deflection joint both include an annular structure, one of the two ends of the annular structure is provided with one or two connecting blocks 1111, and the other end of the annular structure is provided with one or two connecting grooves 1112, and the connecting blocks 1111 and the connecting grooves 1112 are provided in a one-to-one correspondence.

[0055] Specifically, when there are two connecting blocks 1111, the two connecting blocks 1111 are symmetrically arranged on opposite sides of the corresponding deflection joint 11, and the connecting blocks 1111 on two adjacent deflection joints 11 are staggered along the circumferential direction of the deflection chain 10, so that when the deflection chain 10 is in the first state, the rotation axes 1113 of the multiple rotating structures 111 are perpendicular to the extension direction of the deflection chain 10 and arranged in a spiral shape. Alternatively, when there are two connecting blocks 1111, the two connecting blocks 1111 are arranged on opposite sides of the corresponding deflection joint 11, and the two connecting blocks 1111 on the same deflection joint 11 are staggered along the longitudinal direction y of the deflection chain 10, so that when the deflection chain 10 is in the first state, the rotation axes 1113 of the multiple rotating structures 111 are inclined to the extension direction of the deflection chain 10 and are parallel to each other.

[0056] Specifically, when a connecting block 1111 is provided at one of the two ends of the annular structure, and a connecting groove 1112 is provided at the other end of the annular structure, and the connecting block 1111 and the connecting groove 1112 are provided in a one-to-one correspondence, the annular structure needs to have a certain thickness, so that the rotation axis between the connecting block 1111 and the connecting groove 1112 can be determined, and then the rotation direction between each deflection joint 11 can be determined, and the connection between the connecting block 1111 and the connecting groove 1112 of each deflection joint 11 is more reliable, and both the connecting block 1111 and the connecting groove 1112 are provided in two and one-to-one correspondence. Figures 1 to 6 、 Figures 9 to 11 The first embodiment is shown. In the first embodiment, the connecting blocks 1111 on two adjacent deflection segments 11 are staggered along the circumferential direction of the deflection link 10, that is, the two adjacent rotation axes 1113 are respectively located at the two ends of the same deflection segment 11, and the position of the latter rotation axis 1113 is obtained by rotating the former rotation axis 1113 around the central axis a by a certain angle and then spacing it along the length direction y of the deflection link 10. At this time, the rotation axes 1113 are not located in the same plane. Figures 1 to 4 、 Figure 7 、 Figure 8 as well as Figure 12 The second embodiment is shown. The structures of the first and second embodiments of the present application are substantially the same, differing in the arrangement of the rotation axes 1113. In the second embodiment, the two connecting blocks 1111 on the same deflection condyle 11 are staggered along the length direction y of the deflection link 10, i.e., the position of one connecting block 1111 of the same deflection condyle 11 is higher than the position of the other connecting block 1111 along the length direction y. In this case, it is necessary to ensure that the rotation axes 1113 are located in the same plane. Both of the above-mentioned arrangements of the rotation axes 1113 can allow the two ends of the deflection link 10 to be staggered when the deflection link 10 is bent.

[0057] Further, see Figure 4 、 Figure 10 as well as Figure 12 As shown, the deflection chain body 10 includes a first deflection joint and a second deflection joint arranged adjacent to each other, a limiting groove 112 is provided on one of the first deflection joint and the second deflection joint, and a limiting protrusion 113 that is clearance-matched with the limiting groove 112 is provided on the other of the two, and the limiting protrusion 113 and the limiting groove 112 both extend along the length direction y of the deflection chain body 10.

[0058] For example, the limiting protrusion 113 can be a regular or irregular shape such as a cube or a rectangular parallelepiped, and the limiting protrusion 113 and the limiting groove 112 are arranged in a one-to-one correspondence. The limiting protrusion 113 of the same deflection condyle 11 can be one, two, or more than two. The number of limiting protrusions 113 can be reasonably adjusted according to actual needs. The two embodiments of the present application both show the case where the limiting protrusion 113 is a rectangular parallelepiped and there are two limiting protrusions 113 on the same deflection condyle 11. When the deflection serpentine of the present application is bent, the limiting protrusions 113 and the limiting grooves 112 located on both sides of each rotation axis 1113 can cooperate to limit the rotation between two adjacent deflection condyles 11. The limiting protrusions 113 and the limiting grooves 112 can prevent the rotation structure 111 from being damaged due to the excessive rotation angle between the two deflection condyles 11, thereby preventing the entire deflection serpentine from being damaged.

[0059] Further, see Figure 5 、 Figure 6 、 Figures 9 to 11 In the first embodiment, when the deflection link 10 is in the first state, the angle between the projections of the rotation axes 1113 of the two adjacent rotation structures 111 along the central axis a of the deflection link 10 is θ. The smaller the value of θ, the more compact the helix of the deflection link 10 in the second state. The value of θ can be selected and designed according to actual use requirements and is not specifically limited in this application. Figure 5 and Figure 6 As shown, when the deflection link 10 in the first embodiment is bent clockwise and counterclockwise, one end of the deflection link 10 can be staggered in two opposite directions relative to the other end, that is, Figure 5 When the middle deflection snake bone bends clockwise, the skull 20 of the deflection snake bone protrudes to the right to be offset from the coccyx 40. Figure 6 When the middle deflection snake bone bends counterclockwise, the skull 20 of the deflection snake bone protrudes to the left to be offset from the coccyx 40. Figure 7 and Figure 8As shown, when the deflection link 10 in the second embodiment is bent clockwise and counterclockwise, one end of the deflection link 10 can be staggered in the same direction relative to the other end, that is, Figure 7 When the middle deflection snake bone bends clockwise, the skull 20 of the deflection snake bone protrudes to the right to be offset from the coccyx 40. Figure 8 When the middle deflection snake bone bends counterclockwise, the skull 20 of the deflection snake bone protrudes to the right side to be offset from the coccyx 40 .

[0060] Further, see Figure 10 and Figure 12 As shown, the deflection chain body 10 includes an avoidance gap 12, which is provided between two adjacent deflection joints 11 and located on both sides of the rotating structure 111. The provision of the avoidance gap 12 allows the two adjacent deflection joints 11 to be in a clearance fit state, thereby allowing the two adjacent deflection joints 11 to rotate through the rotating structure 111. If the deflection chain body 10 of the present application is not provided with the avoidance gap 12, the two adjacent deflection joints 11 cannot rotate with each other, ultimately resulting in the deflection chain body 10 being unable to bend. The size of the avoidance gap 12 can be reasonably adjusted according to the size of the rotating structure 111 and the rotation range of the two adjacent deflection joints 11, and is not specifically limited in the present application.

[0061] Furthermore, Figure 10 and Figure 12 As shown, a first wire passing hole 114 and a second wire passing hole 115 are respectively provided on two opposite sides of the deflection chain body 10, and a pull wire (not shown in the figure) is provided in each of the first wire passing hole 114 and the second wire passing hole 115. One end of the pull wire is fixedly connected to the first end of the deflection chain body 10, and the other end of the pull wire passes through the second end of the deflection chain body 10. The pull wire is at least used to drive the deflection chain body 10 to switch between the first state and the second state.

[0062] Specifically, when the deflection link 10 is in the first state (i.e., the straight state), the user can pull the pull wire in the first wire hole 114 from the second end of the deflection link 10. At this time, the deflection link 10 can bend in the counterclockwise direction. During the bending process, the two ends of the deflection link 10 are always staggered with each other, thereby preventing the deflection link 10 from blocking the field of view of the endoscope. The user can also pull the pull wire in the second wire hole 115 from the second end of the deflection link 10. At this time, the deflection link 10 can bend in the clockwise direction. During the bending process, the two ends of the deflection link 10 are always staggered with each other, thereby preventing the deflection link 10 from blocking the field of view of the endoscope.

[0063] Further, see Figure 4 、 Figure 10 as well as Figure 12As shown, the deflection link 10 includes a first deflection segment and a second deflection segment arranged adjacent to each other, a first wire hole 114 is provided on the first side of at least one of the first deflection segment and the second deflection segment, and a second wire hole 115 is provided on the second side of at least one of the first deflection segment and the second deflection segment opposite to the first side.

[0064] When actually processing the deflection snake bone, a first wire hole 114 can be provided on the first side of the first deflection joint, and a second wire hole 115 can be provided on the second side of the second deflection joint. Alternatively, the second wire hole 115 can be provided on the second side of the first deflection joint, and the first wire hole 114 can be provided on the first side of the second deflection joint. Alternatively, the first wire hole 114 and the second wire hole 115 can be provided on the first and second sides of the first deflection joint, and the first wire hole 114 and the second wire hole 115 can be provided on the first and second sides of the second deflection joint, respectively. Both the first and second embodiments of the present application illustrate the case where the first wire hole 114 is provided on the first side of the first deflection joint and the second wire hole 115 is provided on the second side of the second deflection joint. The provision of the first and second wire holes 114, 115 can constrain the pull wire, preventing the pull wire from rolling on the peripheral side of the deflection chain body 10, thereby avoiding the embarrassing situation of the deflection direction of the deflection chain body 10 being uncertain when the pull wire is pulled.

[0065] Further, see Figure 1 、 Figure 2 as well as Figure 14 As shown, the deflection snake bone also includes a skull 20, which is connected to the first end of the deflection chain body 10 through a rotating structure 111. First connecting parts 201 are provided on opposite sides of the skull 20, and the pull wire of the deflection chain body 10 is fixedly connected to the first connecting part 201.

[0066] Exemplarily, the end of the skull 20 connected to the deflection chain 10 can be a connecting block 1111 or a connecting groove 1112. The first and second embodiments of the present application both illustrate the case where the end of the skull 20 connected to the deflection chain 10 is a connecting block 1111. In addition, the skull 20 of the present application is also provided with a first wire hole 114 and a second wire hole 115, an identification hole 202, a skull window 203, and a U-shaped groove 204. The first wire hole 114 and the second wire hole 115 can better constrain the pull wire on the skull. The identification hole 202 is only provided on one side, and the identification hole 202 can be used to identify the bending direction of the deflection chain 10. The skull window 203 can be used to observe whether the pull wire is fixed to the skull 20. The U-shaped groove 204 can provide a better field of view for the endoscope and space for placing other devices. The provision of the first connecting portion 201 can better fix the end of the pull wire on the skull, so that when the user pulls the pull wire, the deflection snake bone can switch between a straight state and a bent state under the action of the pull wire.

[0067] Further, see Figure 1 and Figure 13 As shown, the deflection snake bone also includes a main chain segment 30, which is arranged at the second end of the deflection chain body 10 and is connected to the deflection chain body 10 through a rotating structure 111. The rotation axis 1113 of each rotating structure 111 of the main chain segment 30 is perpendicular to the central axis a of the main chain segment 30 and the rotation axes 1113 of each rotating structure 111 are parallel to each other.

[0068] Specifically, the structures of the joints of the main chain segment 30 and the deflection joints 11 of the deflection link 10 are substantially identical. The difference lies in that the rotation axes 1113 at both ends of each joint of the main chain segment 30 are perpendicular to the central axis a of the main chain segment 30 and parallel to each other. This prevents the ends of the main chain segment 30 from staggering during bending. In actual design, the length of the main chain segment 30 should not be too long. Specifically, the length of the main chain segment 30 should be such that it cannot bend completely.

[0069] Further, see Figure 1 、 Figure 2 as well as Figure 15 As shown, the deflection snake also includes a coccyx 40, which is arranged at the end of the main segment 30 away from the deflection chain body 10 and is connected to the main segment 30 through a rotating structure 111. The end of the coccyx 40 away from the main segment 30 is provided with a second connecting portion 401, and the second connecting portion 401 is at least used to connect the coccyx 40 to the base of the endoscope.

[0070] Specifically, the second connecting portion 401 can be obtained by slotting the end of the coccyx 40 away from the main chain segment 30 and dividing it into a petal-like structure. The number of petals in the petal-like structure can be greater than 0 petals, and the number of petals in the petal-like structure can also be less than or equal to 6 petals. The provision of the second connecting portion 401 of the petal-like structure can facilitate the connection of the coccyx 40 to the base of the endoscope, because the petal-like structure can produce a certain elastic deformation. During the process of installing the coccyx 40 on the base of the endoscope, the petal-like structure can be stretched out to the four sides, making it easier for the user to install the coccyx 40 on the base of the endoscope. After the coccyx 40 is installed on the base of the endoscope, the petal-like structure can gather toward the middle, thereby making the connection between the coccyx 40 and the base of the endoscope more reliable.

[0071] From the above statements, it can be known that the present application solves the problem of the field of view being easily blocked and the unreliable deflection of the snake bone when the snake bone is deflected by setting a deflection snake bone composed of a deflection chain body 10, a skull 20, a main chain segment 30 and a coccyx 40. The deflection snake bone of the present application can solve the problem of the field of view being easily blocked and the unreliable deflection of the snake bone when the snake bone is deflected by setting a deflection chain body 10 with two different rotation axis 1113 layouts, so that the skull 20 and the coccyx 40 of the deflection snake bone can be staggered with each other during the bending process of the deflection snake bone. At the same time, in order to prevent the connection between the connecting block 1111 and the connecting groove 1112 from falling off, the deflection snake bone of the present application is processed by laser centripetal cutting on a whole section of pipe, that is, the laser beam is perpendicular to the central axis a of the pipe, and then the rotating pipe is continuously fed, thereby realizing the processing of various structures on the deflection snake bone. This processing method makes the edges of the connecting block 1111 and the connecting groove 1112 wedge-shaped, and the connecting block 1111 is nested in the connecting groove 1112, so that when the deflection snake bone switches between the bent state and the straight state, the connecting block 1111 of each rotating structure 111 is nested in the connecting groove 1112 and will not fall off.

[0072] It can be seen that the present application abandons the previous setting of a single deflection structure of the snake bone, and adopts a deflection chain body 10 composed of multiple deflection bones 11, which can solve the problem that the field of view is easily blocked when the snake bone is deflected, and can also solve the problem of unreliable deflection of the snake bone caused by gravity.

[0073] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0074] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0075] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A deflection snake bone, which is used at least in conjunction with an endoscope, characterized in that: The deflection snake bone includes: A deflection chain (10), comprising at least three deflection joints (11) connected in sequence, wherein two adjacent deflection joints (11) are rotationally connected via a rotating structure (111), and wherein the deflection chain (10) has a first state in which it is arranged in a straight line and a second state in which it is arranged in a curved spiral line. When the deflection chain (10) is in the first state: The rotation axes (1113) of the plurality of rotating structures (111) are all inclined to the extension direction of the deflection chain (10) and are parallel to each other; or, The rotation axes (1113) of the plurality of rotating structures (111) are all perpendicular to the extension direction of the deflection chain (10) and are arranged in a spiral shape.

2. The deflection snake bone according to claim 1, characterized in that: The deflection link (10) comprises a first deflection joint and a second deflection joint that are adjacently arranged; The rotating structure (111) comprises a connecting block (1111) and a connecting slot (1112), one of the connecting block (1111) and the connecting slot (1112) being arranged at the first deflection joint, and the other being arranged at the second deflection joint; The connecting block (1111) includes a rotating portion (11111) and a limiting portion (11112) connected to the rotating portion (11111); the connecting groove (1112) includes a rotating groove (11121) and a limiting groove (11122) connected to the rotating groove (11121); the rotating portion (11111) is rotatably arranged in the rotating groove (11121); and the limiting portion (11112) is swingably connected to the limiting groove (11122).

3. The deflection snake bone according to claim 2, characterized in that: The rotating portion (11111) and the rotating groove (11121) are both arranged in a circular shape, the limiting groove (11122) and the limiting portion (11112) are both arranged in an arc shape, the center of the arc is consistent with the center of the circle, and along the extension direction of the limiting groove (11122), the limiting groove (11122) is longer than the limiting portion (11112).

4. The deflection snake bone according to claim 2, characterized in that: The first deflection joint and the second deflection joint both comprise an annular structure, one of the two ends of the annular structure is provided with one or two connecting blocks (1111), and the other end of the annular structure is provided with one or two connecting grooves (1112), and the connecting blocks (1111) and the connecting grooves (1112) are provided in a one-to-one correspondence; Wherein, when there are two connecting blocks (1111), the two connecting blocks (1111) are symmetrically arranged on opposite sides of the corresponding deflection joint (11), and the connecting blocks (1111) on two adjacent deflection joints (11) are staggered along the circumferential direction of the deflection chain (10), so that when the deflection chain (10) is in the first state, the rotation axes (1113) of the multiple rotating structures (111) are perpendicular to the extension direction of the deflection chain (10) and are arranged in a spiral shape; or, When there are two connecting blocks (1111), the two connecting blocks (1111) are arranged on opposite sides of the corresponding deflection joint (11), and the two connecting blocks (1111) on the same deflection joint (11) are staggered along the length direction (y) of the deflection chain (10), so that when the deflection chain (10) is in the first state, the rotation axes (1113) of the multiple rotating structures (111) are all inclined to the extension direction of the deflection chain (10) and are parallel to each other.

5. The deflection snake bone according to claim 1, characterized in that: The deflection link (10) comprises a first deflection segment and a second deflection segment arranged adjacent to each other, a limiting groove (112) being provided on one of the first deflection segment and the second deflection segment, and a limiting protrusion (113) which is loosely fitted with the limiting groove (112) being provided on the other of the first deflection segment and the second deflection segment, and both the limiting protrusion (113) and the limiting groove (112) are extended along the length direction (y) of the deflection link (10).

6. The deflection snake bone according to claim 1, characterized in that: The deflection link (10) comprises an avoidance gap (12), and the avoidance gap (12) is arranged between two adjacent deflection joints (11) and is located on both sides of the rotating structure (111).

7. The deflection snake bone according to any one of claims 1 to 6, characterized in that: The deflection chain body (10) is provided with a first wire hole (114) and a second wire hole (115) on opposite sides, respectively. A pull wire is provided in each of the first wire hole (114) and the second wire hole (115). One end of the pull wire is fixedly connected to the first end of the deflection chain body (10), and the other end of the pull wire passes through the second end of the deflection chain body (10). The pull wire is at least used to drive the deflection chain body (10) to switch between the first state and the second state.

8. The deflection snake bone according to claim 7, characterized in that: The deflection link (10) comprises a first deflection segment and a second deflection segment arranged adjacent to each other, wherein the first side of at least one of the first deflection segment and the second deflection segment is provided with the first wire hole (114), and the second side of at least one of the first deflection segment and the second deflection segment, which is opposite to the first side, is provided with the second wire hole (115).

9. The deflection snake bone according to claim 7, characterized in that: The deflection snake bone further comprises a skull (20), the skull (20) being connected to the first end of the deflection chain body (10) via the rotating structure (111), first connecting parts (201) being provided on opposite sides of the skull (20), and the pull wire being fixedly connected to the first connecting part (201).

10. The deflection snake bone according to claim 9, characterized in that: The deflection snake bone further comprises a main chain segment (30), the main chain segment (30) being arranged at the second end of the deflection chain body (10) and connected to the deflection chain body (10) via the rotating structure (111), the rotating axes (1113) of the rotating structures (111) of the main chain segment (30) being perpendicular to the central axis (a) of the main chain segment (30), and the rotating axes (1113) of the rotating structures (111) being parallel to each other.

11. The deflection snake bone according to claim 10, characterized in that: The deflection snake bone further comprises a coccyx (40), the coccyx (40) being arranged at one end of the main chain segment (30) away from the deflection chain body (10) and connected to the main chain segment (30) via the rotating structure (111), and a second connecting portion (401) being provided at one end of the coccyx (40) away from the main chain segment (30), the second connecting portion (401) being at least used for connecting the coccyx (40) to the base of the endoscope.

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