CN219250104U - Snake bone tube and endoscope - Google Patents

Abstract

The utility model relates to a snake bone tube and an endoscope. The snake bone tube comprises a snake bone, a bending tube and a steel wire rope; at least one steel wire rope is fixedly arranged at one end of the inner pipe wall of the snake bone so as to control the bending of the snake bone by pulling the steel wire rope; each steel wire rope is sleeved with a bending pipe, and the bending pipe is fixed relative to the inner pipe wall of the snake bone; the bending tube comprises a plurality of sections of bending parts which are sequentially connected along the axial direction of the snake bone, and the elastic modulus of at least two sections of bending parts is different; sleeving the bending pipe comprising a plurality of sections of bending parts and at least two sections of bending parts with different elastic moduli on the steel wire rope, and applying gradually increasing traction force to the snake bone through the steel wire rope, so that when the traction force is smaller, the bending part with smaller elastic modulus is firstly bent, and at the moment, the bending amplitude of the bending part with larger elastic modulus is smaller and can be ignored; and when the traction force is increased to a certain degree, the other section of bending part starts to bend; therefore, the sectional bending of the bending tube is realized, and the use requirements of endoscopes of doctors under different conditions are met.

Description

Snake bone tube and endoscope

Technical Field

The utility model relates to the technical field related to endoscopes, in particular to a snake bone tube and an endoscope.

Background

The snake bone tube is arranged in the endoscope body of the existing endoscope, and the steel wire rope connected with the snake bone can be controlled and pulled through the handle of the endoscope to control the bending deformation of the snake bone tube, so that the bending direction change of the endoscope body of the endoscope is realized;

according to the different operation conditions, the head of the endoscope body is only required to be bent, or the whole endoscope body is required to be bent, but the current snake bone tube cannot be bent in a segmented mode, and the use experience and operation effect of a doctor can be affected to a certain extent.

Disclosure of Invention

Accordingly, it is necessary to provide a snake bone tube and an endoscope capable of achieving sectional bending, aiming at the problem that the snake bone tube in the endoscope body cannot be subjected to sectional bending.

The application firstly provides a snake bone tube, which comprises a snake bone, a bending tube and a steel wire rope; at least one steel wire rope is fixedly arranged at one end of the inner pipe wall of the snake bone so as to control the bending of the snake bone by pulling the steel wire rope; each steel wire rope is sleeved with one bending pipe, and the bending pipes are fixed relative to the inner pipe wall of each snake bone; the bending tube comprises a plurality of sections of bending parts which are sequentially connected along the axial direction of the snake bone, and the elastic modulus of at least two sections of bending parts is different.

In one embodiment, the elastic modulus of each section of the bending portion is the same at each position, and the elastic modulus of each section of the bending portion decreases in the direction approaching the fixed end of the steel wire rope along the axial direction of the snake bone.

It can be understood that the elastic modulus of each section of bending part is gradually decreased along the axial direction of the snake bone towards the direction close to the fixed end of the steel wire rope, so that the traction force of the steel wire rope to the snake bone is gradually increased, different bending parts in the bending tube are correspondingly bent, bending is started section by section along the sequence from the head part to the tail part, a doctor can select bending or integral bending of the head part of the snake bone tube according to actual situation requirements during operation, and meanwhile, the bending length of the head part of the snake bone tube can be selected according to requirements.

In one embodiment, the curved tube comprises two sections of the curved portion.

It can be understood that designing the bending tube as two sections of bending portions with different elastic moduli can reduce the production cost and the operation difficulty of the snake bone tube as much as possible on the premise of meeting medical requirements under most conditions.

In one embodiment, the length of the bending portion near the fixed end of the wire rope in the direction of the snake bone axis is 60% -70% of the total length of the bending tube 20.

It will be appreciated that this range of lengths is the bending length required for bending the head of a snake bone canal in most cases; as the traction applied by the wire rope increases, the bending section preferably bends to meet the bending head requirements of the snake in most cases.

In one embodiment, the bends of each segment are of different materials, and have the same diameter and tube thickness.

It can be understood that different materials are selected through the bending parts of different sections, and under the premise of ensuring that the elastic modulus of the bending parts of different sections is different, the outer circumferential surface and the inner circumferential surface of the bending pipe are cylindrical surfaces, so that the steel wire rope, the bending pipe and the snake bone are conveniently sleeved, inserted and installed, and the installation difficulty is further reduced.

In one embodiment, the material of the bending part is silica gel or plastic.

It can be appreciated that, on the one hand, compared with other materials, the silica gel or plastic has stable property and less irritation to human body, and the burden and influence on the patient are relatively less when the silica gel or plastic is used as a snake bone tube part to extend into the body of the patient for examination; on the other hand, the types and the types of the silica gel and the plastic are relatively more, so that the types and the types of the proper elastic modulus can be conveniently selected according to actual needs.

In one embodiment, one end of the steel wire rope is fixed on the inner pipe wall of the snake bone by laser welding.

It will be appreciated that laser welding does not additionally occupy the internal space of the snake bone and does not scratch other components within the snake bone.

In one embodiment, a portion of the pipe wall of the snake bone is concaved inwards to form a limiting recess penetrating along the axial direction, the snake bone is provided with at least one group of limiting parts, each group of limiting parts comprises a plurality of limiting recesses which are distributed along the axial direction of the snake bone and correspond to each other, and each limiting part is internally penetrated with one bending pipe.

In one embodiment, the snake bone has two sets of the limiting portions disposed opposite each other.

It can be understood that the bending of the snake bone to two opposite directions can be controlled by applying traction force to the snake bone through the corresponding steel wire rope, so that the operation requirements under most conditions are met.

A second aspect of the present application provides an endoscope comprising a snake bone tube as described above.

The snake bone pipe is characterized in that the bending pipe comprising a plurality of sections of bending parts and at least two sections of bending parts with different elastic moduli is sleeved on the steel wire rope, and gradually increasing traction force is applied to the snake bone through the steel wire rope, so that when the traction force is smaller, the bending part with smaller elastic modulus is firstly bent, and at the moment, the bending amplitude of the bending part with larger elastic modulus is smaller and can be ignored; and when the traction force is increased to a certain degree, the other section of bending part starts to bend; thereby realize the segmentation bending of crooked pipe, and then drive the snake bone through crooked pipe and accomplish the segmentation bending of snake bone pipe, satisfy doctor's endoscope user demand under different circumstances, increase the universality and the flexibility of use of this application snake bone pipe.

Drawings

FIG. 1 is a schematic perspective view of a snake bone tube according to the application;

FIG. 2 is an enlarged schematic view of the curved tube of FIG. 1;

FIG. 3 is a schematic view of the left-hand side of the snake bone tube of FIG. 1;

FIG. 4 is a schematic cross-sectional view of the structure of FIG. 3 in the direction A-A;

fig. 5 is a schematic sectional view of the structure in the direction B-B in fig. 3.

Reference numerals: 10. snake bone; 11. a limit part; 11a, limiting recess; 20. bending the tube; 21. a bending portion; 30. a wire rope; 40. an insertion portion.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1 to 4, the present application first provides a snake bone tube, which comprises a snake bone 10, a bending tube 20 and a wire rope 30; at least one steel wire rope 30 is fixedly arranged at one end of the inner pipe wall of the snake bone 10 so as to control the bending of the snake bone 10 by pulling the steel wire rope 30; each steel wire rope 30 is sleeved with a bending tube 20, and the bending tube 20 is fixed relative to the inner tube wall of the snake bone 10; the bending tube 20 includes a plurality of bending portions 21 connected in sequence in the axial direction of the snake bone 10, and at least two bending portions 21 have different elastic moduli.

Since the bending tube 20 is fixed with respect to the inner tube wall of the snake bone 10 while the bending tube 20 is sleeved on the corresponding wire rope 30, there is a tendency for the bending tube 20 and the snake bone 10 to bend in the direction of the corresponding traction force when traction force is applied to the end of the snake bone 10 through the wire rope 30.

On this basis, since the bending tube 20 includes the plurality of bending portions 21 and the elastic moduli of at least two bending portions 21 are different, the deformation amounts of the two bending portions 21 occurring when receiving the external force of the same magnitude are different, that is, the bending amplitude of one bending portion 21 having a smaller elastic modulus is larger than that of the other bending portion 21.

It will be appreciated that by controlling the difference in the modulus of elasticity of the two bends 21, and gradually applying a traction force that increases the wire 30 to the ends of the snake 10:

when the traction force is smaller, the bending portion 21 with smaller elastic modulus starts to bend, and at this time, the bending amplitude of the other section of bending portion 21 is smaller and can be ignored; and when the traction increases to a certain extent, the other section of the bending portion 21 starts to bend; thereby realize bending tube 20's segmentation crooked, and then drive snake bone 10 through bending tube 20 and accomplish the segmentation crooked of snake bone pipe, satisfy doctor's endoscope user demand under different circumstances, increase the universality and the flexibility of use of this application snake bone pipe.

In addition, the bending tube 20 is sleeved on the steel wire rope 30 and is arranged in the snake bone 10, on one hand, the bending tube 20 can replace a stainless steel tube or a spring tube sleeved on the steel wire rope 30 in the prior art, so that the effects of reducing the overall weight of the snake bone tube and reducing the production cost are achieved; on the other hand, compared with the bending tube 20 sleeved outside the snake bone 10, the setting mode in the application can avoid the diameter increase of the snake bone tube, and reduce the volume of the snake bone tube as much as possible so as to be convenient for being inserted into a human body.

Of course, in some embodiments, the elastic moduli of the bending sections 21 may be different from each other or may be partially the same according to the actually required sectional bending effect, and only the corresponding elastic moduli of the bending sections 21 need to be selected from small to large according to the required bending sequence, which is not limited herein.

It should be noted that, the different and partially identical portions are all the mutual comparisons between the elastic moduli of the different sections of the bending portion 21, and the elastic modulus of each section of the bending portion 21 itself is a certain value; it will be appreciated that if there is a difference in the modulus of elasticity in each segment of the bend 21, there will be a difference in the magnitude of bending between the portions of the bend 21 when subjected to a certain force, which may result in affecting the normal segment bending process.

Referring to fig. 5, in some embodiments, an insertion portion 40 is fixed at one end of the snake bone 10 near the handle of the endoscope, the bending tube 20 extends into the insertion portion 40, and the wire rope 30 penetrates through the insertion portion 40.

In some embodiments, the elastic modulus of each section of the bending portion 21 is the same at each position, and the elastic modulus of each section of the bending portion 21 decreases in the direction of the axis of the snake bone 10 toward the fixed end of the wire rope 30.

For convenience of the following description, the end of the snake bone 10, the bent tube 20 and the wire 30 near the handle of the endoscope is defined as the tail portion, and the end near the lens of the endoscope is defined as the head portion.

By arranging the elastic modulus of each section of bending part 21 to decrease along the axial direction of the snake bone 10 towards the direction close to the fixed end of the steel wire rope 30, so that the bending starts section by section corresponding to different bending parts 21 in the bending tube 20 along the sequence from the head to the tail along with the gradual increase of the traction force of the steel wire rope 30 on the snake bone 10, a doctor can select bending or integral bending of the head of the snake bone tube according to actual situation needs during operation, and meanwhile, the bending length of the head of the snake bone tube can also be selected according to needs (the traction force of the steel wire rope 30 is adjusted to increase or decrease the bending section number of the bending part 21).

It should be noted that the decreasing elastic modulus refers to the mutual comparison between the elastic moduli of the different sections of the bending tube 20, and the elastic modulus of each section of the bending tube 20 is constant.

In addition, in the present application, the bending tube 20 is divided into the multiple sections of bending portions 21, and the elastic moduli of the different bending portions 21 are decreased, compared with the scheme that the elastic moduli of the bending tube 20 decrease linearly along the axial direction of the snake bone 10, the latter is in the process of gradually increasing the traction force of the steel wire rope 30, the bending portion moves gradually along the axial direction of the snake bone 10 towards the side close to the handle of the endoscope, and no obvious segmentation difference exists in the whole bending process, so that the doctor can select the corresponding bending state (bending at the head or the whole bending) according to the actual situation when operating.

Referring to fig. 2, in some embodiments, the bent tube 20 includes two bent portions 21 on the basis of the above embodiments.

It will be appreciated that if the bending tube 20 includes an excessive number of bending portions 21, the manufacturing cost of the snake bone tube will be increased, and the bending difficulty of the snake bone tube will be increased; in most cases, however, only the snake bone tube is needed by the doctor to distinguish between the bending of the head and the bending of the whole body during the actual operation.

Therefore, the bending tube 20 is designed into two sections of bending parts 21 with different elastic modulus, and the production cost and the operation difficulty of the snake bone tube can be reduced as far as possible on the premise of meeting medical requirements in most cases.

In some embodiments, based on the above embodiments, the length of a section of the bending part 21 near the fixed end of the steel wire rope 30 along the axial direction of the snake bone 10 accounts for 60% -70% of the total length of the bending tube 20; preferably, the length of the bending portion 21 near the fixed end of the wire rope 30 is in the range of 40mm to 60mm, which is the bending length required for bending the head of the snake bone pipe in most cases; as the traction applied by the wire 30 increases, the length of curvature 21 preferably flexes to meet the head curvature requirements of the snake in most cases.

Referring to FIG. 2, in some embodiments, the material of each segment of the curved portion 21 is different, and the diameter and the tube thickness are the same.

In the above-mentioned scheme, the elastic modulus of the bending parts 21 of different sections is changed by selecting different materials so that the diameters of the bending parts 21 of each section in each bending pipe 20 and the inner diameter of the pipe are the same; compared with the scheme that the elastic modulus is changed by changing parameters such as the diameter of the bending part 21 or the pipe wall thickness, in the process of sleeving the bending pipe 20 to the steel wire rope 30, the steel wire rope 30 possibly abuts against the stepped structure of the changing position of the inner diameter of the pipe of the two adjacent bending parts 21, so that the sleeving and installation are difficult; in addition, the stepped structure in which the outer diameters of the adjacent two bent portions 21 are changed in position during the installation of the latter bent tube 20 into the snake bone 10 tube may also abut against the opening of the snake bone 10, thereby causing difficulty in insertion and installation.

In this application scheme, select different materials through different section flexion 21 for the outer peripheral face and the inner peripheral face of crooked pipe 20 are the face of cylinder under the prerequisite that the modulus of elasticity of different section flexion 21 is different is guaranteed, and then the cover between wire rope 30, crooked pipe 20 and snake bone 10 of being convenient for is established and is inserted the installation, has further reduced the installation degree of difficulty.

In some embodiments, the material of the bending portion 21 is silica gel or plastic; on the one hand, compared with other materials, the property of the silica gel and the plastic is stable, the irritation to the human body is small, and the burden and the influence on the patient are relatively small when the silica gel and the plastic are used as the snake bone pipe part to extend into the body of the patient for examination; on the other hand, the types and the types of the silica gel and the plastic are relatively more, so that the types and the types of the proper elastic modulus can be conveniently selected according to actual needs.

Of course, the material of the bending portions 21 may be other materials as long as the elastic modulus of each bending portion 21 satisfies the required bending order, and the present application is not limited thereto.

In some embodiments, one end of the wire rope 30 is laser welded to the inner tube wall of the snake bone 10; compared with the traditional soldering fixation, the laser welding device has the advantages that the size of the welding spot is not easy to control, so that the inner space is occupied, burrs are easy to generate, related parts are scratched, and the like, the laser welding does not additionally occupy the inner space of the snake bone 10, and other parts in the snake bone 10 are not scratched.

Specifically, the first end of the steel wire rope 30 is fixed at the first end of the inner pipe wall of the snake bone 10, so as to ensure that traction force is applied to the snake bone 10 through the steel wire rope 30, and the whole snake bone 10 can be controlled to bend.

Referring to fig. 1, 4 and 5, in some embodiments, a portion of the wall of the snake bone 10 is concaved inward to form a limiting recess 11a penetrating along the axial direction, the snake bone 10 has at least one set of limiting portions 11, each set of limiting portions 11 includes a plurality of limiting recesses 11a arranged along the axial direction of the snake bone 10 and corresponding to each other, and a bending tube 20 penetrates through each set of limiting portions 11.

Specifically, each limiting recess 11a includes two through grooves penetrating through the wall of the snake bone 10 and a recess portion located between the two through grooves, the two through grooves are parallel to each other and are formed along the circumferential direction of the snake bone 10, and the recess portion is recessed toward the inside of the snake bone 10 to form the limiting recess 11a.

The outer peripheral surface of the bending tube 20 far away from the central axis side of the snake bone 10 is propped against the inner tube wall of the snake bone 10, the outer peripheral surface of the bending tube 20 near the central axis side of the snake bone 10 is propped against the surface of the concave part far away from the central axis side of the snake bone 10, and then the limiting of the bending tube 20 along the radial direction of the snake bone 10 is realized through the concave part and the snake bone 10, and the friction force between the bending tube 20 and the steel wire rope 30 is matched, so that the relative fixation between the bending tube 20 and the snake bone 10 is realized.

Of course, the bending tube 20 can be fastened to the snake bone 10 by a clamping connection or other conventional connection methods, which is not further limited herein.

Referring to fig. 3 and 4, in some embodiments, the snake bone 10 has two sets of limiting parts 11 disposed opposite to each other; namely, the snake bone 10 is internally provided with two bending pipes 20 which are oppositely arranged, so that the bending of the snake bone 10 in two opposite directions can be controlled by applying traction force to the snake bone 10 corresponding to the steel wire rope 30, so as to meet the operation requirements in most cases.

Of course, according to the different operation requirements, the snake bone 10 can also be provided with a plurality of groups of limiting parts 11, and the corresponding steel wire ropes 30 and the control structure are matched to meet the use requirements of bending the snake bone in more directions, which is not further limited herein.

A second aspect of the present application provides an endoscope comprising a snake bone tube as described above.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. A snake bone tube, which is characterized by comprising a snake bone (10), a bending tube (20) and a steel wire rope (30);

one end of the inner pipe wall of the snake bone (10) is fixedly provided with at least one steel wire rope (30) so as to control the bending of the snake bone (10) by pulling the steel wire rope (30);

each steel wire rope (30) is sleeved with one bending tube (20), and the bending tubes (20) are fixed relative to the inner tube wall of the snake bone (10);

the bending tube (20) comprises a plurality of sections of bending parts (21) which are sequentially connected along the axial direction of the snake bone (10), and the elastic modulus of at least two sections of bending parts (21) is different.

2. The snake bone tube according to claim 1, wherein the elastic modulus of each section of the bending portion (21) is the same at each position, and the elastic modulus of each section of the bending portion (21) decreases toward the side near the fixed end of the wire rope (30) along the axial direction of the snake bone (10).

3. A snake bone tube according to claim 2, characterised in that the curved tube (20) comprises two sections of the curved portion (21).

4. A snake bone tube according to claim 3, characterised in that the length of the bending part (21) near the fixed end of the wire rope (30) in the direction of the axis of the snake bone (10) is 60-70% of the total length of the bending tube (20).

5. A snake bone tube according to claim 1, characterised in that the material of the bends (21) of each segment is different and the diameter and thickness of the tube are the same.

6. A snake bone tube according to claim 5, characterised in that the material of the bending part (21) is silica gel or plastic.

7. A snake bone tube according to claim 1, characterised in that one end of the wire rope (30) is laser welded to the inner tube wall of the snake bone (10).

8. The snake bone tube according to claim 1, wherein a part of the tube wall of the snake bone (10) is concavely formed into a limiting recess (11 a) penetrating along the axial direction, the snake bone (10) is provided with at least one group of limiting parts (11), each group of limiting parts (11) comprises a plurality of limiting recesses (11 a) which are arranged along the axial direction of the snake bone (10) and correspond to each other, and one bending tube (20) penetrates through each group of limiting parts (11).

9. A snake bone tube according to claim 8, characterised in that the snake bone (10) has two sets of said limit parts (11) arranged opposite each other.

10. An endoscope comprising a snake bone tube according to any of claims 1 to 9.

Images