CN115191913A - Bending section, insertion section, and endoscope - Google Patents
Bending section, insertion section, and endoscope Download PDFInfo
- Publication number
- CN115191913A CN115191913A CN202210930419.1A CN202210930419A CN115191913A CN 115191913 A CN115191913 A CN 115191913A CN 202210930419 A CN202210930419 A CN 202210930419A CN 115191913 A CN115191913 A CN 115191913A
- Authority
- CN
- China
- Prior art keywords
- tube
- instrument tube
- instrument
- bending
- deformation unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005452 bending Methods 0.000 title claims abstract description 105
- 238000003780 insertion Methods 0.000 title claims abstract description 23
- 230000037431 insertion Effects 0.000 title claims abstract description 23
- 230000000670 limiting effect Effects 0.000 claims abstract description 35
- 230000008859 change Effects 0.000 claims description 9
- 230000008602 contraction Effects 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 5
- 230000009471 action Effects 0.000 description 20
- 230000004323 axial length Effects 0.000 description 18
- 230000000694 effects Effects 0.000 description 11
- 230000005284 excitation Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 5
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 241000270295 Serpentes Species 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00071—Insertion part of the endoscope body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/005—Flexible endoscopes
- A61B1/0051—Flexible endoscopes with controlled bending of insertion part
- A61B1/0055—Constructional details of insertion parts, e.g. vertebral elements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/012—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor
- A61B1/018—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor for receiving instruments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
Abstract
The application discloses flexion, insertion part and endoscope, the flexion is applied to the endoscope, the flexion includes instrument pipe, a plurality of locating parts and a plurality of drive tube, wherein: the plurality of limiting pieces are arranged on the instrument tube, the limiting pieces are sequentially arranged at intervals along the axial direction of the instrument tube, the driving tubes are arranged along the circumferential direction of the instrument tube and penetrate through the limiting pieces, a deformation unit is defined between two adjacent limiting pieces on the driving tubes, and the deformation unit is configured to enable the bending part to be bent through expansion under the condition that expansion media are introduced into the driving tubes; the driving tube is provided with a resistance changing structure, and the resistance changing structure is used for preventing the deformation unit from expanding and deforming along the radial direction of the instrument tube. The scheme can prevent related devices of the bending part from being damaged by pressure.
Description
Technical Field
The present application relates to the technical field of medical equipment, and in particular, to a bending portion, an insertion portion, and an endoscope.
Background
Endoscopes, as a common medical instrument, are widely used in modern medicine. The endoscope comprises an insertion part, the insertion part comprises a front end part and a bending part which are connected, the front end part comprises a camera and other devices, and the orientation of the front end part can be changed by adjusting the bending posture of the bending part, so that the functions of fixed-point observation and the like in a human body are realized.
In the related art, in order to simplify the structure of the bending portion, a balloon expansion scheme is generally adopted in the industry to replace a snake bone scheme, and the specific means is that gas is introduced into a balloon at one side of an instrument tube, and the balloon is expanded to push the instrument tube to bend towards the other side, so that the bending action of the bending portion is realized. However, the balloon of the above solution, when inflated, may press against surrounding devices and may cause damage to these devices.
Disclosure of Invention
The application discloses a bending part, an insertion part and an endoscope, which can prevent related devices of the bending part from being damaged by pressure.
In order to solve the above problems, the following technical solutions are adopted in the present application:
in a first aspect, the present application provides a bending portion for an endoscope, the bending portion comprising an instrument tube, a plurality of limiting members, and a plurality of driving tubes, wherein:
the limiting pieces are arranged on the instrument tube, the limiting pieces are sequentially arranged at intervals along the axial direction of the instrument tube, the driving tubes are arranged along the circumferential direction of the instrument tube and penetrate through the limiting pieces, and a deformation unit is defined between two adjacent limiting pieces on the driving tubes;
the driving tube is provided with a resistance changing structure, and the resistance changing structure is used for preventing the deformation unit from expanding and deforming along the radial direction of the instrument tube.
In a second aspect, the present application provides an insert comprising a plurality of the curved portions of the first aspect of the present application, all of which are sequentially end-to-end.
In a third aspect, the present application provides an endoscope comprising the insertion section of the second aspect of the present application.
In the bending part, the insertion part and the endoscope disclosed by the application, the driving tube is used for introducing an expansion medium to expand and deform the deformation unit so as to realize the bending action of the bending part, wherein the resistance change structure is arranged in the driving tube and is used for preventing the deformation unit from expanding and deforming along the radial direction of the instrument tube, so that the deformation amplitude of the deformation unit in the radial direction of the instrument tube can be reduced, the relevant devices in the bending part are prevented from being squeezed, and the devices are prevented from being damaged.
Compared with the related technology, the scheme of the application can obviously protect related devices of the bending part, so that the service life of the bending part is prolonged.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application.
In the drawings:
FIG. 1 is a schematic structural diagram of an insertion portion disclosed in an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a bending portion disclosed in an embodiment of the present application in a bent state;
FIGS. 3 and 4 are partial schematic structural views of two bending portions disclosed in the embodiments of the present application;
fig. 5 and fig. 6 are schematic structural views of the woven mesh structure disclosed in the embodiment of the present application before and after the deformation units are expanded (the woven mesh structure is in an expanded state);
FIG. 7 is a schematic view of the driving tube extending or retracting in the axial direction according to the embodiment of the present application;
FIG. 8 is a front view of the drive tube disclosed in an embodiment of the present application;
FIG. 9 is a front view of another drive tube disclosed in an embodiment of the present application;
fig. 10 is a schematic view of the working principle of a plurality of bending portions disclosed in the embodiment of the present application.
Description of reference numerals:
100-front end part, 110-camera, 120-light source,
200-bending part, 210-instrument tube, 220-limiting part, 230-driving tube, 230 a-resistance change structure, 230a 1-grid unit, 231-deformation unit, 232-first side wall, 233-second side wall and 234-hollow part.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Technical solutions disclosed in the embodiments of the present application are described in detail below with reference to the accompanying drawings.
In order to solve the technical problem that the bending part of the endoscope is damaged due to the fact that related devices around the bending part are pressed during bending action in the related art, the embodiment of the application provides the bending part which is applied to the endoscope.
Referring to fig. 1 to 10, a bending portion 200 disclosed in the embodiment of the present application includes an instrument tube 210, a plurality of limiting members 220, and a plurality of driving tubes 230, wherein:
the instrument tube 210 is an inner tube body of the bending portion 200, which extends from the operation portion of the endoscope to the distal end portion 100, and medical instruments (e.g., graspers, scissors, etc.) can be fed into the patient body via the instrument tube 210 to perform a surgical operation at a target site. Optionally, the instrument tube 210 may also be used to deliver a cleaning fluid so that the lesion site of the patient may be cleaned.
The plurality of limiting members 220 are all arranged on the instrument tube 210, and the instrument tube 210 is an installation foundation of the limiting members 220; along the axial direction of the instrument tube 210, a plurality of the limiting members 220 are sequentially arranged at intervals, that is, the limiting members 220 are spaced apart from each other; the driving tubes 230 are disposed through the limiting members 220, and on the driving tubes 230, two adjacent limiting members 220 define a deformation unit 231 therebetween.
Under the structural layout, each driving tube 230 penetrates through all the limiting members 220 to realize assembly, each driving tube 230 comprises two parts, namely a deformation unit 231 and a region connected with the limiting members 220, under the condition that an expansion medium is introduced into the driving tube 230, the region where the driving tube 230 is connected with the limiting members 220 is restrained by the circumferential direction of the limiting members 220, the expansion deformation of the deformation unit 231 can be generated, the axial length of the driving tube 230 is changed by the deformation of the deformation unit 231, and the change of the position relationship of the two adjacent limiting members 220 can be shown due to the fact that the driving tube 230 is adjacent to the limiting members 220, for example, the distance between the limiting members 220 on the two sides of the deformation unit 231 is increased or reduced. In combination with the feature that the limiting member 220 is connected to the instrument tube 210, the change of the axial length of the driving tube 230 caused by the deformation unit 231 is transmitted to the instrument tube 210, and a corresponding change of the axial length is generated on a side region of the instrument tube 210 corresponding to the driving tube 230.
Meanwhile, a plurality of driving tubes 230 are arranged along the circumference of the instrument tube 210, so that the axial length of the corresponding region on the instrument tube 210 can be changed by introducing expansion media into different driving tubes 230 on the circumference of the instrument tube 210, and the bending action of the bending part 200 can be realized by the mutual matching of the driving tubes 230. Taking fig. 2 as an example for explanation, the expansion medium is introduced into only one of the driving tubes 230, the axial length of the driving tube 230 is changed by the deformation of the deformation unit 231, the region of the instrument tube 210 corresponding to the driving tube 230 is changed in axial length by the transmission of the stopper 220, and the axial length of the other region of the instrument tube 210 is kept unchanged, so that the instrument tube 210 is bent by the difference in axial length in the respective regions of the instrument tube 210 in the circumferential direction, and the bending portion 200 formed by the instrument tube 210, the stopper 220 and the driving tube 230 realizes the bending operation as a whole.
As shown in fig. 7 (a) and 7 (b), when the deformation of the deformation unit 231 is axial extension, the adjacent stoppers 220 are spread apart, the distance between the stoppers is increased, that is, the driving tube 230 is axially extended, and the bending portion 200 is bent toward the opposite side of the driving tube 230 through which the inflation gas is introduced; as shown in fig. 7 (a) and 7 (c), when the deformation of the deforming unit 231 is axial contraction, the adjacent stoppers 220 are pulled up and the distance therebetween is decreased, that is, the driving pipe 230 is contracted in the axial direction, and the bending portion 200 is bent toward the side (i.e., the expansion side) where the driving pipe 230 into which the expansion gas is introduced. In the embodiment of the present application, the specific deformation manner of the deformation unit 231 is not limited.
It should be noted that the embodiment of the present application does not limit the specific number of the driving pipes 230 and the specific type of the expansion medium, wherein, as shown in fig. 3, there are 4 driving pipes 230, and as shown in fig. 4, there are two driving pipes 230; the expansion medium may be a fluid such as gas, liquid, etc., in case the expansion medium is gas, the driving tube 230 is a pneumatic tube solution, and further, the expansion medium may be helium, argon, nitrogen, etc.
In the embodiment of the present application, the limiting member 220 has various structural types, for example, as shown in fig. 2, the limiting member 220 is a limiting ring, or the limiting member 220 is a limiting block, and a plurality of limiting blocks may be arranged at intervals along the circumferential direction of the instrument tube 210.
In the embodiment of the present application, the driving tube 230 has a resistive switching structure 230a, and the resistive switching structure 230a is used for preventing the deformation unit 231 from expanding and deforming along the radial direction of the instrument tube 210.
It should be understood that, as described above, the driving pipe 230 is changed in axial length by the deformation of the deformation unit 231, thereby performing the bending action of the bending part 200; furthermore, when the deformation unit 231 is deformed by expansion, there is a deformation component in the radial direction of the instrument tube 210, and this deformation component may cause the deformation unit 231 to contact with surrounding devices and generate a squeezing action, and in the case of an excessive squeezing action, may cause damage to these devices, which may be the instrument tube 210 and the circuit board and piping provided thereon, the sheath around the bend 200, and the like. In the technical solution of the embodiment of the present application, although the deformation unit 231 still has a tendency of expansion deformation in all directions along the outer periphery after the expansion medium is introduced into the driving tube 230, the resistance change structure 230a can block the deformation unit 231 from radial expansion deformation along the instrument tube 210, so that the deformation amplitude of the deformation unit 231 in the radial direction of the instrument tube 210 can be effectively reduced, the instrument tube 210 and the sheath are prevented from being squeezed, and the technical effect of preventing these devices from being damaged is achieved.
It should be noted that, based on the blocking effect of the resistive switching structure 230a and the abutting effect of the blocking deformation unit 231 provided by both the wall of the instrument tube 210 and the outer wall of the sheath, the deformation range of the deformation unit 231 in the radial direction of the instrument tube 210 is small, and is limited by the limitation of the limiting member 220, and the deformation range of the deformation unit 231 in the axial direction of the instrument tube 210 is also small, so that the deformation unit 231 of the embodiment of the present application is mainly subjected to expansion deformation in the circumferential direction of the instrument tube 210, and specifically, refer to fig. 2.
Compared with the related art, the technical scheme of the embodiment of the application can protect the related devices of the bending part 200, so that the service life of the bending part 200 is prolonged.
The resistive structure 230a may only exert an obstructing effect on one side of the driving tube 230 in the radial direction of the instrument tube 210, for example, the resistive structure 230a exerts an obstructing effect on a side of the driving tube 230 close to the instrument tube 210, so as to reduce a deformation amplitude of the deformation unit 231 expanding and deforming toward the instrument tube 210, thereby protecting the instrument tube 210 and other devices such as a circuit board, a pipeline, and the like disposed on the instrument tube 210. Further, based on the resistive switching structure 230a of the embodiment of the present application, it can effectively prevent the instrument tube 210 from being squeezed and the sidewall from being recessed into the instrument transmission channel inside, thereby ensuring that the instrument tube 210 always passes through and normally transmits an instrument.
Of course, as shown in fig. 8, the resistive switching structure 230a may also exert a blocking effect on both sides of the driving tube 230 in the radial direction of the instrument tube 210, and such a structural layout can simultaneously reduce the deformation amplitude of the deformation unit 231 expanding and deforming towards and away from the instrument tube 210, so as to protect not only the instrument tube 210 and devices thereon, but also the sheath on the outer periphery of the bending portion 200. Further, based on the resistive switching structure 230a of the embodiment of the present application, it can effectively prevent the sheath from being extruded and the side wall from protruding outward, thereby avoiding the sheath of the bending portion 200 from damaging the lumen of the patient to be examined.
In an alternative, the deforming unit 231 of the embodiment of the present application contracts and bends the bending part 200 at the expansion side thereof by expanding. It should be understood that, with this arrangement, the bending portion 200 is bent toward the side of the driving pipe 230 into which the expansion medium is introduced, that is, the driving pipe 230 on the side is axially contracted by the expansion of the deforming unit 231.
The embodiment in which the driving tube 230 is contracted in the axial direction has a better bending effect than the embodiment in which the driving tube 230 is elongated in the axial direction to achieve bending of the bending part 200, and the following description will be made.
As shown in fig. 7 (a) and 7 (b), in the embodiment in which the driving tube 230 is elongated in the axial direction, the original axial length of the driving tube 230 into which the expansion medium is not introduced is L3, the axial length of the driving tube 230 elongated after the expansion medium is introduced is L4, and L4 is greater than L3; as shown in fig. 7 (a) and 7 (c), in the embodiment in which the driving pipe 230 is contracted in the axial direction, the original axial length of the driving pipe 230 to which the expansion medium is not introduced is L3, and the axial length of the driving pipe 230 contracted after the expansion medium is introduced is L5, and L5 is smaller than L3.
Taking the example that the absolute values of the dimensional changes of the axial length of the driving tube 230 in the two schemes are equal, that is, L4-L3= L3-L5, since the radial length of the circle in which the driving tube 230 axially elongated is bent is longer than the radial length of the circle in which the driving tube 230 axially contracted is bent, that is, the former is located at the outer ring and the latter is located at the inner ring, in this case, L5/L3 is obviously smaller than L3/L4. It should be noted that one of the above two schemes is to achieve bending based on the elongation of the driving tube 230, and the other scheme is to achieve bending based on the contraction of the driving tube 230, that is, the bending degree of both schemes is determined by the absolute value of the dimension change of the axial length of the driving tube 230.
Further, the axial length variation of the axially contracted driving tube 230 occupies a larger proportion of the corresponding circular ring, which proves that the driving tube 230 is more bent, i.e. forms a larger bending arc, in the axially contracted scheme compared with the axially extended scheme, and in particular, see the scheme shown in fig. 7 for comparison: as shown in fig. 7 (b), in the bending scheme in which the driving pipe 230 is extended in the axial direction, the central angle of the bending portion 200 is θ 1, and as shown in fig. 7 (c), in the bending scheme in which the driving pipe 230 is contracted in the axial direction, the central angle of the bending portion 200 is θ 2, and θ 2 is significantly larger than θ 1.
It can be seen that, in the case that the driving pipe 230 has the same axial length variation, the curvature of the bending part 200 adopting the axial contraction bending manner is larger than that of the bending part 200 adopting the axial extension bending manner, and the former obviously improves the bending efficiency of the bending part 200, that is, the response speed of the bending part 200 is faster, thereby optimizing the bending effect of the bending part 200.
In the embodiment of the present application, there are various ways to achieve the axial contraction of the driving tube 230 after the expansion medium is introduced into the driving tube 230, for example, the bending portion 200 further includes a pressure sensor, an electrically controlled excitation member and a shape memory alloy, wherein the pressure sensor is disposed adjacent to the deformation unit 231, the electrically controlled excitation member is respectively connected to the pressure sensor and the shape memory alloy, and the shape memory alloy is disposed in the driving tube 230; in a specific working process, after the expansion medium is introduced into the driving tube 230, the deformation unit 231 expands, the pressure sensor sends an excitation signal to the electrically controlled excitation member after being pressed, and the electrically controlled excitation member transmits energy to the shape memory alloy, so that the shape memory alloy deforms to drive the driving tube 230 to axially contract.
In further embodiments, as shown in fig. 5 to 7, the resistive switching structure 230a may be a woven mesh structure for applying a tensile force to the deformation unit 231, which contracts in the radial and axial directions of the instrument tube 210, in the case where the deformation unit 231 is expanded and deformed.
It should be understood that there may be complementary characteristics in the all-directional dimensions of the woven mesh structure, for example, as shown in fig. 5, the mesh unit 230a1 in the woven mesh structure shown in fig. 5 has a length S1 and a width L1 before the deformation unit 231 is expanded and deformed, as shown in fig. 6, and after the deformation unit 231 is expanded and deformed, the mesh unit 230a1 in the woven mesh structure shown in fig. 6 has a length S2 and a width L2, and it can be seen that the overall width of the woven mesh structure is increased by the mutual pulling action of the internal woven wires of the woven mesh structure before and after the deformation unit 231 is expanded and deformed to compensate for the reduction of the overall length.
Returning to the practical solution, as mentioned above, the deformation unit 231 of the embodiment of the present application is mainly expanded and deformed along the circumferential direction of the instrument tube 210, and based on the characteristic analysis of the woven mesh structure, when the size of the deformation unit 231 along the circumferential direction of the instrument tube 210 is increased, the woven mesh structure applies a pulling force to reduce the size of the deformation unit 231 in other directions, which may specifically be changed to include the radial and axial contraction of the deformation unit 231 along the instrument tube 210. Even if limited by the expansion action of the expansion medium, the deformation elements 231 will at least have a tendency to shrink in other directions than the circumferential direction of the instrument tube 210 under the tensile force exerted by the woven mesh structure, i.e. the deformation elements 231 will have a tendency to contract in the radial and axial directions of the instrument tube 210.
Whether the deformation unit 231 contracts along the radial direction and the axial direction of the instrument tube 210 or the contraction trend is existed, the tensile force applied by the woven mesh structure to the deformation unit 231 can form a barrier to the expansion deformation along the radial direction of the instrument tube 210, so that the deformation amplitude of the deformation unit 231 in the direction can be reduced, and the related devices such as the instrument tube 210, the sheath and the like can be prevented from being extruded.
Meanwhile, based on the existence of the stoppers 220, the deformation amplitude of the deformation unit 231 in the axial direction of the instrument tube 210 is relatively small, the tensile force applied by the woven mesh structure to the deformation unit 231 pulls the deformation unit 231 to reduce the axial length of the driving tube 230, the adjacent stoppers 220 are pulled close, the distance between the adjacent stoppers 220 is reduced, and the bending portion 200 bends toward the side of the driving tube 230 where the expansion medium is introduced, so that the bending action of the bending portion 200 is smoothly realized.
Compared to the pneumatic solution in which the driving tube 230 is axially extended to achieve bending of the bending portion 200 (as is the case with the conventional airbag pneumatic solution), the woven mesh structure of the embodiment of the present application is used as the resistive switching structure 230a, which achieves bending of the bending portion 200 by axially contracting the driving tube 230, and thus, not only can the effect of preventing the relevant components of the bending portion 200 from being damaged due to pressure, but also the bending effect of the bending portion 200 can be optimized.
In addition, in the embodiment in which the driving tube 230 is elongated in the axial direction, particularly in the conventional balloon pneumatic solution, the deformation unit 231 (for example, the balloon) is deformed toward the whole periphery thereof when expanding, and the deformation of the whole periphery in several directions needs to consume the expansion action of the expansion medium, respectively, whereas in the embodiment in which the driving tube 230 of the embodiment has the woven mesh structure, the expansion medium mainly drives the deformation unit 231 to perform the expansion deformation in the axial direction of the instrument tube 210, and the woven mesh structure pulls the driving tube 230 to axially contract after the deformation, and it can be seen that the expansion medium of the embodiment is equivalent to concentrate the axial contraction of the driving tube 230 when applying the expansion action, thereby further improving the bending efficiency of the bending portion 200.
Further, in the woven mesh structure of the embodiment of the present application, the density of the mesh units 230a1 distributed in the radial direction of the device tube 210 is greater than the density of the mesh units 230a1 distributed in the circumferential direction of the device tube 210. It should be understood that the density of the braided mesh structure affects the deformation resistance, and in particular, due to the greater density of the mesh unit 230a1 distributed in the radial direction of the instrument tube 210, the drawing action points of each braided wire in the region are denser, and the stability is significantly enhanced, so that the resistance effect of the resistive structure 230a on the expansion deformation of the deformation unit 231 in the radial direction of the instrument tube 210 can be further enhanced; and the density of the grid distributed on the circumference of the instrument tube 210 is smaller, the pulling action points of each braided wire in the area are fewer, and the stability is poorer, so that the expansion deformation of the deformation unit 231 along the circumference of the instrument tube 210 is more conveniently realized, and the expansion action of the expansion medium along the radial direction of the instrument tube 210 is further shared.
In the present embodiment, the type of the woven mesh structure is various, such as a plurality of woven meshes provided inside the driving tube 230. In further embodiments, the woven mesh structure may be in the form of a mesh tube. With this arrangement, the woven mesh structure is a unitary structure that matches the tubular structure of the drive tube 230 and is more conducive to deforming in response to expansion of the deformation elements 231 throughout, thereby applying a tensile force to the entire deformation elements 231 that contracts in a radial or axial direction of the instrument tube 210.
In another embodiment of resistive switching structure 230a, as shown in fig. 2 and 9, drive tube 230 can include two first sidewalls 232 distributed along a radial direction of instrument tube 210 and two second sidewalls 233 distributed along a circumferential direction of instrument tube 210, the first sidewalls 232 having a thickness greater than a thickness of the second sidewalls 233; the resistive switching structure 230a includes two first sidewalls 232. It should be understood that, in this embodiment, the two first sidewalls 232 constitute the resistive switching structure 230a, and the first sidewall 232 with the larger thickness is obviously stronger, which can act to reinforce the resistance of the resistive switching structure 230a to the expansion deformation of the deformation unit 231 along the radial direction of the instrument tube 210; the second sidewall 233 of smaller thickness is less strong, which is more convenient to achieve the expansion deformation of the deformation unit 231 in the circumferential direction of the instrument tube 210.
In another embodiment of resistive switching structure 230a, as shown in fig. 2 and 8, drive tube 230 includes two first sidewalls 232 distributed along a radial direction of instrument tube 210 and two second sidewalls 233 distributed along a circumferential direction of instrument tube 210, the first sidewalls 232 being made of a material having a smaller flexibility than the second sidewalls 233; the resistive switching structure 230a includes two first sidewalls 232. It is to be understood that, in this embodiment, the two first sidewalls 232 constitute the resistive switching structure 230a; the deflection refers to the deformation of the member after being stressed, and the deflection of the material of the first sidewall 232 is smaller, which obviously has better resistance to deformation, thereby strengthening the resistance effect of the resistive structure 230a on the expansion deformation of the deformation unit 231 along the radial direction of the instrument tube 210; the more flexible second sidewall 233 is less resistant to deformation, thereby facilitating the expansion deformation of the deformation unit 231 in the circumferential direction of the instrument tube 210.
In the embodiment of the present application, the layout of the first sidewall 232 and the second sidewall 233 is not specifically divided, for example, as shown in fig. 8, in the circumferential direction of the driving pipe 230, the first sidewall 232 and the second sidewall 233 are sequentially arranged at intervals, and the sidewall between the two may adopt a material or a thickness different from that of the two; as shown in fig. 9, the first side wall 232 is directly connected to the second side wall 233 in the circumferential direction of the drive pipe 230.
Considering that in the above-mentioned embodiment of thickening the first sidewall 232 and reducing the flexibility of the first sidewall 232, the first sidewall 232 may hinder the expansion deformation in the axial direction of the deformation unit 231, as shown in fig. 9, in an alternative, a hollow portion 234 may be provided in the first sidewall 232 of the driving tube 230, and the hollow portion 234 may extend along the axial direction of the driving tube 230. With such an arrangement, the axially extending hollow 234 obviously reduces the strength of the deformation unit 231 in the axial direction, thereby facilitating the expansion deformation of the deformation unit 231 in the axial direction of the instrument tube 210, and thus the bending action of the bending portion 200.
The number of the hollow portions 234 provided in the first side wall 232 is not limited, and as shown in fig. 9, one hollow portion 234 is provided in the first side wall 232, but may be provided in plural as long as the hollow portions are arranged along the axial direction of the driving pipe 230.
In another embodiment of the resistive switching structure 230a, the resistive switching structure 230a may be a metal sheet with relatively high rigidity embedded in the tube wall of the driving tube 230 along the axial direction thereof, and the metal sheet is disposed in the radial direction of the instrument tube 210, and the metal sheet can significantly enhance the strength of a region of the driving tube 230 corresponding to the radial direction of the instrument tube 210, where the region can hinder the deformation amplitude of the deformation unit 231 along the radial direction of the instrument tube 210 when the deformation unit 231 is expanded and deformed.
The metal sheet can be movably disposed in the axial direction in the tube wall of the driving tube 230, so as to prevent the metal sheet from obstructing the axial deformation of the deformation unit 231, thereby ensuring that the deformation unit 231 can smoothly realize the bending action of the bending portion 200 through the axial deformation.
In an alternative, as shown in FIG. 2, the drive tube 230 is elliptical in cross-section, with the drive tube 230 having the major axis of the ellipse disposed along the circumference of the instrument tube 210. With this arrangement, the deformation unit 231 can store a larger amount of the expansion medium in the major axis direction of the ellipse, so that the expansion medium exerts a larger expansion effect in the circumferential direction of the instrument tube 210, thereby facilitating the expansion deformation of the deformation unit 231 in the circumferential direction of the instrument tube 210; at the same time, in comparison, less expansion medium is stored in the deformation unit 231 in the direction of the minor axis of the ellipse, so that the expansion action exerted by the expansion medium in the radial direction of the instrument tube 210 is smaller, which is beneficial for reducing the deformation amplitude of the deformation unit 231 in the radial direction of the instrument tube 210.
Referring to fig. 1 to 10, based on the aforementioned bending portion 200, an insertion portion is further provided in an embodiment of the present application, which includes a plurality of bending portions 200 mentioned in any of the aforementioned aspects, so that the insertion portion has the beneficial effects of any of the aforementioned aspects, and details are not repeated herein.
As shown in fig. 1, the insertion portion further includes a front end portion 100, a bending portion 200 at a distal end is connectable to the front end portion 100, and the "distal end" refers to an end of the insertion portion away from the operation portion. The front end portion 100 may be provided with a camera 110, a light source 120, and the like, wherein the camera 110 is used for acquiring image information, and the light source 120 is used for illuminating an area to which the front end portion 100 faces.
As shown in fig. 10, all the bent portions 200 are sequentially connected end to end. It should be understood that each bending portion 200 can implement a bending action, so as to implement a segmented bending control of the insertion portion, and in a case that the insertion portion extends into the tract to be examined, by adjusting parameters such as a bending direction, a bending angle, and the like of different bending portions 200, it can be specifically represented that the three bending portions 200 in fig. 10 respectively implement a bending action along a bending path a, a bending path b, and a bending path c, so as to better match paths of different regions of the tract to be examined, thereby avoiding a problem that different sections of the insertion portion can contact with the tract to be examined to cause injury.
Further, as shown at a in fig. 10, in the adjacent two bent portions 200, the drive pipe 230 of one is arranged to be offset from the drive pipe 230 of the other. It will be appreciated that the location of the drive tube 230 into which the inflation medium is introduced determines the direction of bending of the drive tube 230, and in this arrangement, the offset arrangement of the drive tubes 230 in adjacent bends 200 increases the direction of bending of the bends 200, thereby allowing the combination of bending positions between the bends 200 to be expanded to improve the adaptability of the insertion portion.
Of course, as shown at B in fig. 10, in the insertion portion of the embodiment of the present application, in two adjacent bending portions 200, the driving tube 230 may also be correspondingly disposed.
Based on the insertion portion, an endoscope is further provided in an embodiment of the present application, which includes the insertion portion mentioned in any one of the foregoing aspects, so that the endoscope has the beneficial effects of any one of the foregoing aspects, and details are not repeated here.
The endoscope of the embodiment of the application can be a gastroscope, an enteroscope, a laryngoscope, a fiber bronchoscope and the like, and the embodiment of the application does not specifically limit the types of the endoscopes.
In the embodiments of the present application, the difference between the embodiments is described in detail, and different optimization features between the embodiments can be combined to form a better embodiment as long as the differences are not contradictory, and further description is omitted here in view of brevity of the text.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art to which the present application pertains. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A bending section for an endoscope, comprising an instrument tube, a plurality of limit members and a plurality of drive tubes, wherein:
the plurality of limiting pieces are arranged on the instrument tube, the limiting pieces are sequentially arranged at intervals along the axial direction of the instrument tube, the driving tubes are arranged along the circumferential direction of the instrument tube and penetrate through the limiting pieces, a deformation unit is defined between two adjacent limiting pieces on the driving tubes, and the deformation unit is configured to enable the bending part to be bent through expansion under the condition that expansion media are introduced into the driving tubes;
the driving tube is provided with a resistance changing structure, and the resistance changing structure is used for preventing the deformation unit from expanding and deforming along the radial direction of the instrument tube.
2. The bending portion according to claim 1, wherein the deformation unit contracts and bends the bending portion on an expansion side thereof by expanding.
3. The bend of claim 2 wherein the resistive switching structure is a braided mesh structure for applying tension to the deformation unit in radial and axial contraction of the instrument tube upon expansion deformation of the deformation unit.
4. The curved portion according to claim 3, wherein in the woven mesh structure, a density of mesh cells distributed in a radial direction of the instrument tube is greater than a density of mesh cells distributed in a circumferential direction of the instrument tube.
5. The bend of claim 1 wherein the drive tube comprises two first sidewalls distributed radially of the instrument tube and two second sidewalls distributed circumferentially of the instrument tube, the first sidewalls having a thickness greater than a thickness of the second sidewalls; the resistance change structure comprises two first side walls.
6. The bending section according to claim 1, wherein the drive tube comprises two first side walls distributed in a radial direction of the instrument tube and two second side walls distributed in a circumferential direction of the instrument tube, wherein the material of the first side walls has a smaller flexibility than the material of the second side walls; the resistance change structure comprises two first side walls.
7. The curved portion of claim 1, wherein the drive tube has an elliptical cross-section, the drive tube arranging a major axis of the ellipse along a circumference of the instrument tube.
8. An insert comprising a plurality of the flexures of any one of claims 1-7, all of which are in turn end-to-end.
9. An insertion part according to claim 8, characterized in that in two adjacent bends the drive tube of one is arranged offset from the drive tube of the other.
10. An endoscope comprising the insertion section of claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210930419.1A CN115191913B (en) | 2022-08-03 | 2022-08-03 | Bending portion, insertion portion, and endoscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210930419.1A CN115191913B (en) | 2022-08-03 | 2022-08-03 | Bending portion, insertion portion, and endoscope |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115191913A true CN115191913A (en) | 2022-10-18 |
| CN115191913B CN115191913B (en) | 2024-04-02 |
Family
ID=83586733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210930419.1A Active CN115191913B (en) | 2022-08-03 | 2022-08-03 | Bending portion, insertion portion, and endoscope |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115191913B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4794912A (en) * | 1987-08-17 | 1989-01-03 | Welch Allyn, Inc. | Borescope or endoscope with fluid dynamic muscle |
| US5179934A (en) * | 1990-02-20 | 1993-01-19 | Olympus Optical Co., Ltd. | Endoscope |
| US5203319A (en) * | 1990-06-18 | 1993-04-20 | Welch Allyn, Inc. | Fluid controlled biased bending neck |
| US5577992A (en) * | 1993-10-05 | 1996-11-26 | Asahi Kogaku Kogyo Kabushiki Kaisha | Bendable portion of endoscope |
| CN112089383A (en) * | 2020-10-13 | 2020-12-18 | 四川大学华西医院 | Digestive tract endoscope bending and fixing device |
| CN112220436A (en) * | 2020-10-15 | 2021-01-15 | 深圳市锐丽视科技有限公司 | Pneumatic endoscope bending body |
| CN113940729A (en) * | 2021-12-21 | 2022-01-18 | 极限人工智能有限公司 | Universal snake bone assembly, endoscope instrument forceps and split type operation device |
-
2022
- 2022-08-03 CN CN202210930419.1A patent/CN115191913B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4794912A (en) * | 1987-08-17 | 1989-01-03 | Welch Allyn, Inc. | Borescope or endoscope with fluid dynamic muscle |
| US5179934A (en) * | 1990-02-20 | 1993-01-19 | Olympus Optical Co., Ltd. | Endoscope |
| US5203319A (en) * | 1990-06-18 | 1993-04-20 | Welch Allyn, Inc. | Fluid controlled biased bending neck |
| US5577992A (en) * | 1993-10-05 | 1996-11-26 | Asahi Kogaku Kogyo Kabushiki Kaisha | Bendable portion of endoscope |
| CN112089383A (en) * | 2020-10-13 | 2020-12-18 | 四川大学华西医院 | Digestive tract endoscope bending and fixing device |
| CN112220436A (en) * | 2020-10-15 | 2021-01-15 | 深圳市锐丽视科技有限公司 | Pneumatic endoscope bending body |
| CN113940729A (en) * | 2021-12-21 | 2022-01-18 | 极限人工智能有限公司 | Universal snake bone assembly, endoscope instrument forceps and split type operation device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115191913B (en) | 2024-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6899674B2 (en) | Endoscope shaft comprising a movable end portion | |
| EP0422887B1 (en) | Bending device | |
| US5337733A (en) | Tubular inserting device with variable rigidity | |
| JP4459047B2 (en) | System for advancing an endoscope through a meandering path | |
| US5299562A (en) | Endoscope having a controllable distal end piece | |
| KR101309496B1 (en) | Improved self-propelled endoscopic device | |
| EP2874532B1 (en) | Elongate medical device with articulating portion | |
| JP6226359B2 (en) | Hydraulic actuator and bending drive device | |
| JP2009050559A (en) | Endoscopic insertion apparatus | |
| US20130331651A1 (en) | Flexible tube portion of endoscope and endoscope having this flexible tube portion | |
| US20090253958A1 (en) | Endoscope, connection method of bending section and flexible section in endoscope, production method of endoscope provided for this connection method, endoscope overtube, connection method of bending section and flexible section in endoscope overtube and production method of endoscope overtube provided for this connection method | |
| CN212879241U (en) | Insertion tube and endoscope | |
| JP6226360B2 (en) | Hydraulic actuator and bending drive device | |
| CN115191913A (en) | Bending section, insertion section, and endoscope | |
| JP6248116B2 (en) | Flexible and extendable tubular guide and method for manufacturing the same | |
| JPS5930504A (en) | External mounting device of optical fiber bundle for endoscope | |
| JP3189645B2 (en) | Angle section of endoscope | |
| US10779806B2 (en) | Cable sheaths and assemblies for use in curved medical and other tools | |
| CN218045201U (en) | Endoscope tip cap pipe | |
| JPH03131222A (en) | Endoscope | |
| CN114983319A (en) | Controllable crooked formula endoscope of gynaecology | |
| JPH04170931A (en) | Endoscope | |
| JP2004290322A (en) | Flexible tube of endoscope | |
| JPH03131223A (en) | Endoscope | |
| JPH02249526A (en) | Endoscope |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |