CN117158873A - Snake bone structure and endoscope - Google Patents

Abstract

The application discloses a snake bone structure and an endoscope, and relates to the technical field of medical appliances. The snake bone structure comprises a limiting piece and a pipe body. The body includes a plurality of sequentially connected bone segments. An avoiding opening is formed between two adjacent bone segments. The first side and the second side of the first direction of the bone segment are both provided with a limiting member, and the limiting member is positioned in the bone segment. The first direction is radial to the bone segment. The surface of the bone segment forming the avoidance port is an avoidance end surface. At least one end of the limiting piece in the extending direction protrudes out of the avoidance end face. Under the condition that the pipe body is bent, two adjacent bone segments can be stopped and limited by a limiting piece on the same side, and an avoidance gap is formed between the two adjacent bone segments. The snake bone structure is beneficial to solving the problem that the snake bone structure clamps the external wrapping layer of the snake bone structure.

Description

Snake bone structure and endoscope

Technical Field

The application relates to the technical field of medical instruments, in particular to a snake bone structure and an endoscope.

Background

An endoscope is a commonly used medical instrument, is an inspection instrument capable of directly entering a natural pipeline of a human body, and can provide sufficient diagnostic information for doctors to treat diseases. The endoscope comprises an insertion part which can enter the human body through a human body cavity or an operation avoidance port.

In the related art, the insertion portion includes a main body portion, a front end assembly, and a snake bone. One end of the extension direction of the snake bone is connected with the distal end of the main body part. The front end component is arranged at the second end of the extension direction of the snake bone. The snake bone comprises a plurality of bone segments, and the bone segments are rotationally fastened, so that the orientation of the front end assembly is adjusted through relative rotation between two adjacent bone segments, and the snake bone is further suitable for a bent human body cavity or a visual area of the front end assembly is adjusted.

However, in the related art, the outer wrapping layer between two adjacent bone segments is easily damaged during bending of the snake bone structure, thereby affecting the normal use of the endoscope.

Disclosure of Invention

The application discloses a snake bone structure and an endoscope, which are used for solving the problem that the snake bone structure is easy to damage an external wrapping layer in the related technology.

In order to solve the problems, the application adopts the following technical scheme:

in a first aspect, the present application provides a snake bone structure. The snake bone structure can be used for an endoscope. The snake bone structure comprises a limiting piece and a pipe body. The body includes a plurality of sequentially connected bone segments. An avoiding opening is formed between two adjacent bone segments. The first side and the second side of the first direction of the bone segment are both provided with a limiting member, and the limiting member is positioned in the bone segment. The first direction is radial to the bone segment. The surface of the bone segment forming the avoidance port is an avoidance end surface. At least one end of the limiting piece in the extending direction protrudes out of the avoidance end face. Under the condition that the pipe body is bent, two adjacent bone segments can be stopped and limited by a limiting piece on the same side, and an avoidance gap is formed between the two adjacent bone segments.

The technical scheme adopted by the application can achieve the following beneficial effects:

in the snake bone structure provided by the application, the limiting piece protrudes out of the avoidance end surface of the bone segment, and in the process of deflecting two adjacent bone segments, the limiting piece positioned on the same side can be used for stopping and limiting. Thus, the maximum deflection angle limit between two adjacent bone segments can be realized. Therefore, in the process of preparing the snake bone structure, the height of the limiting part protruding out of the avoidance end surface can be set to set the maximum angle of the relative deflection of two adjacent bone segments according to the requirement, and the controllability of the bending angle of the snake bone structure is improved. In addition, under the condition that two adjacent bone segments can be stopped and limited by the limiting piece on the same side, an avoidance gap is formed between the two adjacent bone segments, so that the wrapping layer outside the inner side of the bending part of the snake bone structure can deform in the avoidance gap, and the damage to the wrapping layer outside the snake bone structure is prevented.

According to some alternative embodiments, the end of the stop in the direction of extension has a stop face. The limiting surface is obliquely arranged. The limiting parts on the same side of two adjacent bone segments are limited by abutting joint through the limiting surfaces.

According to some alternative embodiments, the bone segments have a rotational portion. The rotating part is positioned between the two limiting parts. Two adjacent bone segments are rotationally engaged by the rotational portion and the two adjacent bone segments are deflectable about a first axis to either a first side or a second side of the bone segments. The limiting surface is parallel to the first axis.

According to some alternative embodiments, the first axis is coplanar with the stop face.

According to some alternative embodiments, the first and second sides of the axial end of the bone segment are each provided with a relief groove. The notch of dodging the groove is located dodges the terminal surface, and dodges the groove and run through the periphery wall of bone segment.

According to some alternative embodiments, the relief groove extends through an inner peripheral wall of the bone segment. Two ends of the limiting piece in the second direction are respectively connected with the groove walls of the avoidance groove. The second direction is the groove width direction of the avoidance groove, and a wire passing hole is formed between the limiting piece and the bone segment.

According to some alternative embodiments, the stop is coupled to an inner side wall of the bone segment. The limiting piece is provided with a wire passing hole, and the wire passing hole penetrates through the limiting piece along the axial direction of the bone segment.

According to some alternative embodiments, one of the two adjacent bone segments has a locking groove in the rotating portion, the other has a locking portion at least partially located in the locking groove, and the locking portion is rotationally locked with the locking groove.

In another aspect, the present application provides an endoscope. The endoscope has the technical characteristics identical to the snake bone structure provided by the application, and can achieve the same technical effects, and the description is omitted here.

According to some alternative embodiments, the endoscope further comprises two pull cords. The two haulage ropes are all worn to locate in the body, and one haulage rope sets up in the first side of the first direction of body, and another haulage rope sets up in the second side of the first direction of body.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of a snake bone structure provided by some alternative embodiments of the application;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a schematic illustration of a stop for a stop on the same side of two adjacent bone segments in alternative embodiments of the present application;

FIG. 4 is a cross-sectional view of a snake bone structure according to some alternative embodiments of the application;

FIG. 5 is a second cross-sectional view of a snake bone structure according to some alternative embodiments of the application;

FIG. 6 is a schematic illustration of a serpentine structure bend in accordance with some alternative embodiments of the present application;

FIG. 7 is an isometric view of a bone segment provided by some alternative embodiments of the present application;

FIG. 8 is a front view of a bone segment provided by some alternative embodiments of the present application;

fig. 9 is a top view of a bone segment provided by some alternative embodiments of the present application;

FIG. 10 is a cross-sectional view A-A shown in FIG. 9;

FIG. 11 is a schematic illustration of two adjacent bone segments being held against a stop by a stop provided in accordance with some alternative embodiments of the present application;

fig. 12 is an enlarged view at B in fig. 11;

fig. 13 is a cross-sectional view of two adjacent bone segments assembled in accordance with some alternative embodiments of the present application.

Reference numerals illustrate:

100-limiting parts; 110-limiting surface; 101-wire passing holes; 200-tube body; 210-bone segment; 211-avoiding end faces; 212-a rotating part; 2121-snap grooves; 2122-a fastening portion; 213-avoidance grooves; 201-avoiding port; 202-avoiding a gap; 300-hauling rope.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, based on the examples herein, which are within the scope of the application as defined by the claims, will be within the scope of the application as defined by the claims.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type, and are not limited to the number of objects, such as the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

In various embodiments of the present application, "proximal" and "distal" refer to the endoscope and its accessories in the environment of use, relative to the user's proximal-distal position, wherein the end closer to the user is designated as the "proximal end" and the end farther from the user is designated as the "distal end".

Two adjacent bone segments in the snake bone structure are relatively deflected and bent under the pulling of the traction rope, so that the insertion part of the endoscope is driven to bend, and different cavities are adapted. In the related art, the inner side of the bending part of the snake bone is stopped and limited by the edge part. Because the outside of snake bone structure is provided with the parcel layer, at the crooked in-process of snake bone, the parcel layer of cladding in the inboard surface of the crooked position of snake bone is pressed deformation, and then causes the parcel in situ to be traped in dodging the mouth easily. Therefore, the external wrapping layer is easy to be clamped and damaged in the deflection and bending process of the snake bone structure, so that the snake bone structure is exposed, and the normal use of the endoscope is affected.

Aiming at the technical problems, the embodiment of the application provides a snake bone structure and an endoscope. The snake bone structure comprises a plurality of sequentially connected bone segments, and a spiral avoidance opening is formed between two adjacent bone segments, so that the snake bone structure can be bent towards the first side and/or the second side. The first side and the second side of the bone segment are both provided with a limiter, and the limiter is located in the bone segment. The surface of the bone segment forming the avoidance port is an avoidance end surface. The end part of the limiting piece protrudes out of the avoidance end surface. Under the condition that the snake bone structure is bent to the first side to the maximum angle, the limiting piece positioned on the first sides of the two adjacent bone segments is in abutting limiting, and an avoidance gap is formed between the first sides of the two adjacent bone segments. Under the condition that the snake bone structure is bent to the second side to the maximum angle, the limiting piece positioned on the second sides of the two adjacent bone segments is in abutting limiting, and an avoidance gap is formed between the second sides of the two adjacent bone segments. Therefore, the limiting piece can limit the maximum bending angle of the snake bone structure, and can form an avoidance gap for accommodating the outer wrapping layer under the condition that the two bone segments deflect to the maximum bending angle, so that the outer wrapping layer is prevented from being clamped and damaged.

The following describes in detail the embodiments of the present application with reference to fig. 1 to 13 by way of specific embodiments and application scenarios thereof.

In a first aspect, the present application provides a snake bone structure. The snake bone structure can be used for an endoscope. Specifically, the snake bone structure can be used for an active bending section of an endoscope insertion part, so that the insertion part can be actively bent to adapt to an internal cavity channel of a body through bending of the snake bone structure, or the distal end of the insertion part is adjusted to be oriented to obtain visual fields of different angles.

Referring to fig. 1, the snake bone structure provided by the application comprises a limiting member 100 and a spiral pipe body 200. Wherein the pipe body 200 is a basic structural member to provide a mounting basis for other components through the pipe body 200.

As shown in FIG. 1, the body 200 includes a plurality of bone segments 210 that are connected in sequence. Illustratively, the tube 200 may be a riveted, rotationally coupled tube structure. Illustratively, two adjacent bone segments 210 are hinged by staking. Of course, the pipe body 200 may also be a pipe body structure formed by integrally cutting a metal pipe. Illustratively, the tube 200 may be a helical structure. Alternatively, the tube 200 is formed from a plurality of sequentially rotatably fastened bone segments 210. For this reason, the present embodiment is not limited to the specific structure of the tube body 200.

Referring to fig. 1, in the case where the tube 200 is of a helical structure, each bone segment 210 is one revolution about the axis of the tube 200. In some alternative embodiments, the axis of the tube 200 refers to the central axis of the tube 200 when the tube 200 is in a straight state. Illustratively, the axis of the tube 200 may be the axis L1 shown in fig. 1.

In some alternative embodiments, the plurality of bone segments 210 may be a unitary structure. Specifically, a tube 200 having a plurality of bone segments 210 may be formed by a cutting process during the preparation of the tube 200.

Referring to fig. 1, a helical relief port 201 is formed between two adjacent bone segments 210, so that the relief port 201 may provide a relief space for deflection of the two adjacent bone segments 210, and thus the tube 200 may deflect and bend to one or more sides.

Referring to fig. 11 and 13, in some alternative embodiments, a plurality of bone segments 210 are rotationally coupled by way of a rotational snap. The escape openings 201 are spaced apart along the extending direction of the tube body 200 so that the tube body 200 can be deflected and bent to one side where the escape openings 201 are provided.

According to some alternative embodiments, the first direction of bone segment 210 has opposite first and second sides. The inner walls of the first side and the second side of the bone segment 210 are each provided with a stop 100. Illustratively, the first direction is radial to the bone segment 210. According to some alternative embodiments, the first direction may be the direction shown on the y-axis in fig. 10.

Referring to fig. 2 and 3, in some alternative embodiments, the bone segment 210 forms the relief port 201 with a relief end surface 211. Illustratively, the end surface of bone segment 210 in the second direction forms a relief port 201. Illustratively, the second direction may be the direction shown by the x-axis in fig. 10.

Referring to fig. 2 to 4, at least one end of the stopper 100 in the extending direction protrudes from the relief end surface 211. As shown in fig. 3, in the case of bending of the tube body 200, two adjacent bone segments 210 may be stopped and restrained by the stopper 100 on the same side, and there is a relief gap 202 between the two adjacent bone segments 210. Specifically, in the event that the snake bone structure is deflected to a maximum bend angle to the first side, two adjacent stop members 100 on the first side of the bone segment 210 are in stop position and have a relief gap 202 between the first sides of the two adjacent bone segments 210. With the snake bone structure deflected to the maximum bend angle to the second side, two adjacent stop members 100 on the second side of the bone segments 210 are in stop position with the relief gap 202 between the second sides of the two adjacent bone segments 210.

In the snake bone structure provided in the above embodiment, the two limiting members 100 located on the same side of the two adjacent bone segments 210 can limit the maximum deflection angle between the two bone segments 210, and avoid excessive bending between the two adjacent bone segments 210. The limiting members 100 on the same side can be used for supporting each other, so that the pulling force of the pulling rope 300 acting on the bone segments 210 at the distal end of the snake bone structure can be sequentially transmitted through the limiting members 100 on the same side, thereby limiting the maximum deflection angle of any two adjacent bone segments 210 and improving the controllability of the deflection angles of different segments of the snake bone structure.

In addition, in the case where the snake bone structure is used for an endoscope, a protective layer is further provided outside the snake bone structure. In some alternative embodiments, the protective layer covering the snake bone structure is made of plastic material. Specifically, the material of the protective layer outside the snake bone structure can be set according to the requirement. The specific material of the protection layer is not limited in this embodiment. The snake bone structure provided in the above embodiment can accommodate the protective layer on the inner side of the bending part through the avoiding gap 202, so as to avoid the protective layer from affecting the bending angle of the bone segment structure, thereby being beneficial to improving the precision of the bending angle of the snake bone structure, and also avoid the protective layer from being broken by two adjacent bone segments 210.

In some alternative embodiments, the shape of the tube 200 is helical. During bending of the snake bone structure, the end face of one of the two adjacent bone segments 210 in the second direction slides along the end face of the other in the second direction towards the inside of the bone segment 210. In the above embodiment, the end portion of the limiting member 100 protrudes out of the avoiding end surface 211, so that the limiting member 100 is beneficial to be stopped against the inner side wall of the bone segment 210, so as to avoid the partial embedding of the bone segment 210 into the adjacent bone segment 210. In addition, in the case of deflection to the maximum bending angle between two adjacent bone segments 210, the stop 100 on the same side on two adjacent bone segments 210 stops. Thus, the deflection angle between two adjacent bone segments 210 can be prevented from being too large by the two stop members 100 on the same side to avoid the two adjacent bone segments 210 from being nested end to end due to too large torsional deformation between the two adjacent bone segments 210.

According to some alternative embodiments, referring to fig. 2 and 5, the end of the stop member 100 in the extending direction has a stop surface 110. The limiting surface 110 is disposed obliquely. In some alternative embodiments, as shown in fig. 3 and 6, the stop 100 on the same side of two adjacent bone segments 210 is held in abutment stop by stop surface 110. Illustratively, in the event that two adjacent bone segments 210 deflect to a maximum bend angle, the stop faces 110 of two adjacent stop members 100 on the same side abut.

In the above embodiment, the limiting members 100 located on the same side of the two adjacent bone segments 210 are abutted and attached through the limiting surfaces 110, so that the two limiting members 100 located on the same side are in surface-to-surface contact limiting, thereby being beneficial to avoiding stress concentration of the supporting part between the two limiting members 100 and improving the reliability of abutting and attaching of the two limiting members 100. In addition, the two limiting members 100 are stopped and limited by the surface, which is beneficial to preventing the two limiting members 100 from sliding relatively, so that the interaction force between the two limiting members 100 can be utilized to block the head and tail of the two adjacent bone segments 210.

Referring to fig. 5, in accordance with some alternative embodiments, stop 100 extends along the axis of bone segment 210. In some alternative embodiments, the stop surface 110 is inclined toward the middle of the extension of the stop 100 along the axial direction of the bone segments 210, so that the force generated by two stops 100 can resist radial movement of one of two adjacent bone segments 210 relative to the other.

According to some alternative embodiments, referring to fig. 1, bone segment 210 has a rotational portion 212. The rotating portion 212 is located between the two stoppers 100. Two adjacent bone segments 210 are rotationally engaged by the rotational portion 212, and the two adjacent bone segments 210 are deflectable about a first axis toward either a first side or a second side of the bone segments 210.

Referring to fig. 1 and 4, according to some alternative embodiments, the rotating portion 212 protrudes from the relief end surface 211 of the bone segment 210, the rotating portion 212 has an arcuate surface, and the arcuate surface abuts against the relief end surface 211 of an adjacent bone segment 210. Referring to fig. 1 and 4, in two adjacent bone segments 210, the turning portion 212 of one projects from the relief end surface 211 of the bone segment 210, and the turning portion 212 abuts against the relief end surface 211 of the other. Illustratively, the rotating portion 212 is a protruding portion disposed on the bone segment 210, and the rotating portion 212 has an arc surface or a spherical surface, so that the rotating portion 212 can form a revolute pair with the adjacent bone segments 210, thereby realizing relative rotation between the two adjacent bone segments 210.

According to some alternative embodiments, the stop surface 110 is parallel to the first axis. During deflection bending of the snake bone structure, the stop 100 rotates in a first plane. Thus, the stop surface 110 is perpendicular to the first plane. Therefore, this embodiment is beneficial to preventing the two adjacent limiting members 100 on the same side from sliding relatively after being stopped, and thus is beneficial to preventing the two limiting members 100 from being dislocated, and improving the reliability of stopping and limiting the two limiting members 100 on the same side.

In some alternative embodiments, referring to fig. 11 and 13, two adjacent bone segments 210 are hingedly connected, and the two adjacent bone segments 210 are rotatable about a first axis. The first axis is coplanar with the stop face 110. Like this, at the crooked in-process of snake bone structure, the spacing face 110 of two locating parts 100 of same side is all put in step and is stopped, and the interact power between two spacing faces 110 is perpendicular to spacing face 110, and then is of value to preventing relative slip between two adjacent spacing faces 110, improves the reliability that snake bone structure stopped to spacing through locating part 100.

According to some alternative embodiments, referring to fig. 4 and 5, stop 100 extends in the axial direction of bone segment 210. Both ends of the extending direction of the limiting member 100 protrude from the avoiding end surfaces 211 of the bone segments 210, respectively, that is, both ends of the limiting member 100 penetrate through the two opposite avoiding end surfaces 211 of the extending direction of the limiting member 100, respectively. In this way, during the deflection and bending process of the snake bone structure, the pulling force applied to the bone segments 210 at the distal end of the snake bone structure can be sequentially transferred to each bone segment 210 directly through the mutual abutting of the limiting members 100 at the same side. Therefore, this embodiment is beneficial for reducing stress in the axial direction of the bone segments 210, and thus for preventing collapse in the axial direction of the snake bone structure, and effectively avoiding the head-to-tail nesting of two adjacent bone segments 210.

In other alternative embodiments, referring to fig. 10, two stop members 100 are provided on one side of each bone segment 210 in the first direction. The two limiting members 100 are arranged at intervals along the axial direction of the bone segment 210, and the end parts of the ends of the two limiting members 100, which are away from each other, protrude out of the avoiding end surface 211 of the bone segment 210. Illustratively, a first stop and a second stop are disposed in each bone segment 210. The first and second stoppers are arranged at intervals along the axial direction of the bone segment 210. One end of the first limiting member, which is far away from the second limiting member, protrudes from the first avoiding end surface 211 in the axial direction of the bone segment 210. One end of the second limiting member away from the first limiting member protrudes out of the second avoidance end surface 211 in the axial direction of the bone segment 210.

In some alternative embodiments, the stop 100 has a first connection and a second connection. The first connecting portions and the second connecting portions are spaced apart along the extending direction of the limiting member 100, and the first connecting portions and the second connecting portions are connected with the bone segments 210, respectively. In some alternative embodiments, the side walls of stop 100 terminate against the inner side walls of bone segments 210. In an alternative embodiment, one of the first and second connection portions is adjacent to a first side of bone segment 210 in the axial direction and the other is adjacent to a second side of bone segment 210 in the axial direction. Illustratively, the first and second connection portions may be welds connecting the stop 100 and the bone segment 210.

In the above embodiment, two connecting portions are formed between the limiting member 100 and the bone segment 210 and are spaced apart along the axial direction of the bone segment 210, so that the strength of the bone segment 210 is increased by the limiting member 100. Thus, this embodiment is beneficial for reducing the twisting deformation of the bone segments 210 in the case of deflection bending of the snake bone structure, thereby preventing the end-to-end nesting of two adjacent bone segments 210 and improving the controllability of the bending angle of the snake bone structure.

In some alternative embodiments, the connection between stop 100 and bone segment 210 extends through bone segment 210 in the axial direction of bone segment 210 to improve the reliability of the assembly of stop 100 with bone segment 210.

According to some alternative embodiments, stop 100 and bone segment 210 may be connected by, but are not limited to, a welding process. Of course, in some alternative embodiments, stop 100 may also be integrally formed with bone segment 210.

According to some alternative examples, referring to fig. 7 and 8, both the first side and the second side of the axial end of the bone segment 210 are provided with relief grooves 213. The notch of the relief groove 213 is located at the relief end surface 211, and the relief groove 213 penetrates the outer peripheral wall of the bone segment 210. As shown in fig. 11 and 12, in the case that two adjacent bone segments 210 are deflected to the maximum bending angle, the avoidance groove 213 is beneficial to increase the space for accommodating the external protection layer of the snake bone structure inside the bending part, and is further beneficial to prevent the external protection layer of the snake bone structure from being pinched by the two adjacent bone segments 210 during the bending process of the snake bone structure.

Referring to fig. 9, 10 and 13, the escape groove 213 penetrates the inner circumferential wall of the bone segment 210. Illustratively, the relief groove 213 extends from the outer peripheral wall of the bone segment 210 to the inner peripheral wall of the bone segment 210. Referring to fig. 9, both ends of the stopper 100 in the second direction are respectively connected to the groove walls of the escape groove 213, the second direction is the groove width direction of the escape groove 213, and the wire passing hole 101 is formed between the stopper 100 and the bone segment 210. The groove width direction of the escape groove 213 is a direction shown by the y-axis in fig. 10.

In some alternative examples, stop 100 is integrally formed with bone segment 210. For example, during preparation of bone segment 210, a cutting seam extending in a second direction may be first cut in a second direction on a first side and/or a second side of bone segment 210. Illustratively, the portion of the cutting seam located on the side adjacent to the axial end of bone segment 210 is bent toward the inside of bone segment 210 to form stop 100 located within bone segment 210.

The snake bone structure provided by the above embodiments is beneficial for the integral formation of the stop member 100 and bone segments 210. Illustratively, not only the relief groove 213 but also the stop member 100 may be formed by recessing the side walls of the relief groove 213. In addition, in the process of preparing the bone segment 210, the limiting member 100 can be formed by cutting, so that the difficulty in processing the snake bone structure is reduced.

In addition, a via 101 is formed between the stop 100 and the bone segment 210. The escape groove 213 penetrates from the outer peripheral wall of the bone segment 210 to the inner peripheral wall of the bone segment 210. For example, where the snake bone structure is used in an endoscope, the wire through hole 101 may be used to pass through a pull wire to secure the pull wire to the first side or the second side of the bone segment 210 via the stop 100, thereby facilitating the pull wire to pull the snake bone structure to deflect the bend. The escape groove 213 penetrates from the outer peripheral wall of the bone segment 210 to the inner peripheral wall of the bone segment 210. Thus, in the case of bending of the snake bone structure, the traction rope can be at least partially positioned in the avoidance groove 213, thereby being beneficial to the smoothness of bending of the traction rope between two adjacent snake bone structures, and further being beneficial to reducing the resistance to pulling the traction rope.

Referring to fig. 4 and 5, in accordance with some alternative embodiments, stop member 100 is coupled to an inner sidewall of bone segment 210. The stopper 100 has a wire passing hole 101, and the wire passing hole 101 penetrates the stopper 100 along the axial direction of the bone segment 210. In some alternative embodiments, stop 100 extends in the axial direction of bone segment 210. The wire through hole 101 penetrates the stopper 100 in the extending direction of the stopper 100.

In some alternative embodiments, stop 100 is a metal tube. Illustratively, the stop 100 may be fixedly attached to the bone segment 210 by welding.

Illustratively, the endoscope includes a pull cord 300. According to some alternative embodiments, in the case of a snake bone structure for an endoscope, the wire passing hole 101 is used to pass through the pull wire 300. Referring to fig. 5 and 6, the traction rope 300 penetrates the stopper 100 along the wire passing hole 101 to deflect and bend to the first side or the second side by pulling the snake bone structure by the traction rope 300.

In the above embodiment, the wire through hole 101 is disposed in the limiting member 100, so that the limiting member 100 located on the same side of the snake bone structure shares one traction rope 300. In this way, the traction rope 300 can guide two adjacent limiting members 100 to stop limiting during bending of the snake bone structure, and can also provide resistance to deflection for two adjacent bone segments 210. In addition, the acting force of the traction rope 300 on the snake bone structure can form the extrusion force between the two limiting members 100, so that the reliability of the stopping and limiting of the two limiting members 100 is improved, and the end-to-end embedding of the two adjacent bone segments 210 is prevented.

Referring to fig. 10 and 13, according to some alternative embodiments, one of the two adjacent bone segments 210 has a fastening groove 2121 at the rotating portion 212, the other rotating portion 212 has a fastening portion 2122, the fastening portion 2122 is at least partially located in the fastening groove 2121, and the fastening portion 2122 is rotatably fastened to the fastening groove 2121.

In the above embodiment, two adjacent bone segments 210 are rotationally locked by the locking portion 2122 and the locking groove 2121. And is stopped by two stoppers 100 on the same side. This avoids the need for a limit structure at the turning portion 212 that defines the maximum deflection angle. Thus, this embodiment is beneficial in preventing the pulling force of the traction rope on the bone segments 210 from separating the fastening portion 2122 from the fastening groove 2121 during deflection of the snake bone structure, and improving the reliability of connection of the bone segments 210 in the snake bone structure.

In another aspect, the present application provides an endoscope. The endoscope comprises the snake bone structure provided by the embodiment, has the same technical effects, and is not described in detail herein.

In some alternative embodiments, the endoscope further comprises an insertion portion and an operative portion. The operation part is a basic structural part and can provide holding and operation controls for operators. The proximal end of the insertion portion is connected to the operation portion. In some alternative embodiments, the snake bone structure is disposed at the distal end of the insertion portion, so as to realize bending and steering of the distal end of the insertion portion through the snake bone structure, so as to adapt to different channels and obtain pictures with different visual angles.

Referring to fig. 5, in some alternative embodiments, the endoscope further includes two pull cords 300. The two traction ropes 300 are all arranged in the pipe body 200 in a penetrating manner, one traction rope 300 is arranged on a first side of the pipe body 200 in the first direction, and the other traction rope 300 is arranged on a second side of the pipe body 200 in the first direction.

In some alternative embodiments, the pull-cord 300 is coupled to the distal bone segments 210 of the snake bone structure and sequentially passes through each bone segment 210 from the distal end of the snake bone structure to the proximal end of the snake bone structure. In some alternative embodiments, the stop 100 has a via 101. The traction rope 300 sequentially penetrates through the limiting pieces 100 on the same side along the wire through hole 101. Thus, the limiting member 100 may be further used to fix the traction rope 300 on the first side or the second side of the snake bone segment, so as to be beneficial to ensuring that the moment arm of the traction rope 300 pulling the bone segment 210 to deflect is maximized, so as to be beneficial to reducing the resistance of the traction rope 300 pulling the snake bone structure to deflect and bend, and reducing the difficulty of the snake bone structure to deflect and bend.

Illustratively, in the event that the snake bone structure requires deflection bending to the first side, the second side of the migration cord may be released by pulling on the first side of the traction cord 300 to deflect each bone segment 210 in the snake bone structure to the first side until the first side stop 100 stops. In the event that the snake bone structure requires deflection bending to the second side, the first side transfer cord may be released by pulling on the second side pull cord 300 to deflect each bone segment 210 in the snake bone structure to the second side until the second side stop 100 stops. Thus, the above-described embodiments can achieve bending of the snake bone structure to either the first side or the second side by two traction ropes 300.

The endoscope of the embodiment of the application can be a bronchoscope, a nephroscope, an esophagoscope, a gastroscope, a enteroscope, an otoscope, a nasoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope and the like, and the embodiment of the application does not limit the type of the endoscope.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application.

Claims (10)

1. The snake bone structure is characterized in that the snake bone structure is used for an endoscope and comprises a limiting piece (100) and a tube body (200), wherein the tube body (200) comprises a plurality of bone segments (210) which are connected in sequence, and an avoidance port (201) is formed between two adjacent bone segments (210);

the limiting piece (100) is arranged on a first side and a second side of the bone segment (210) in a first direction, the limiting piece (100) is positioned in the bone segment (210), and the first direction is the radial direction of the bone segment (210); the surface of the bone segment (210) forming the avoidance port (201) is an avoidance end surface (211), and at least one end of the limiting piece (100) in the extending direction protrudes out of the avoidance end surface (211);

under the condition that the pipe body (200) is bent, two adjacent bone segments (210) can be stopped and limited by the limiting piece (100) on the same side, and an avoidance gap (202) is formed between the two adjacent bone segments (210).

2. The snake bone structure according to claim 1, wherein the end of the limiting member (100) in the extending direction is provided with a limiting surface (110), the limiting surface (110) is obliquely arranged, and the limiting members (100) on the same side of two adjacent bone segments (210) are in abutting joint limiting through the limiting surface (110).

3. The snake bone structure according to claim 2, wherein the bone segments (210) have a rotation part (212), the rotation part (212) being located between two of the limit pieces (100), two adjacent bone segments (210) being rotationally fitted by the rotation part (212), and two adjacent bone segments (210) being deflectable about a first axis towards a first side or a second side of the bone segments (210);

the stop face (110) is parallel to the first axis.

4. A snake bone structure according to claim 3, characterised in that the first axis is coplanar with the stop surface (110).

5. The snake bone structure according to any of claims 1-4, wherein the bone segments (210) are provided with relief grooves (213) on both the first and second sides of the axial ends, the notches of the relief grooves (213) are located on the relief end surfaces (211), and the relief grooves (213) penetrate through the peripheral wall of the bone segments (210).

6. The snake bone structure according to claim 5, wherein the relief groove (213) extends through the inner circumferential wall of the bone segment (210); the two ends of the limiting piece (100) in the second direction are respectively connected with the groove walls of the avoidance groove (213), the second direction is the groove width direction of the avoidance groove (213), and a wire passing hole (101) is formed between the limiting piece (100) and the bone segment (210).

7. The snake bone structure according to any of claims 1-4, wherein the limiting element (100) is connected to the inner side wall of the bone segment (210), the limiting element (100) having a wire-passing hole (101), the wire-passing hole (101) penetrating the limiting element (100) in the axial direction of the bone segment (210).

8. The snake bone structure according to claim 3 or 4, wherein one of the two adjacent bone segments (210) has a rotating portion (212) with a fastening groove (2121) and the other rotating portion (212) has a fastening portion (2122), the fastening portion (2122) is at least partially located in the fastening groove (2121), and the fastening portion (2122) is rotatably fastened to the fastening groove (2121).

9. An endoscope comprising a snake bone structure as claimed in any of claims 1 to 8.

10. The endoscope of claim 9, further comprising two pulling ropes (300), wherein both pulling ropes (300) are arranged in the tube body (200) in a penetrating manner, and one pulling rope (300) is arranged at a first side of the tube body (200) in a first direction, and the other pulling rope (300) is arranged at a second side of the tube body (200) in the first direction.