CN114391898A - Variable stiffness fold-and-unfold road carrier based on elastic corrugated hose and layer blocking principle - Google Patents
Variable stiffness fold-and-unfold road carrier based on elastic corrugated hose and layer blocking principle Download PDFInfo
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- CN114391898A CN114391898A CN202210126455.2A CN202210126455A CN114391898A CN 114391898 A CN114391898 A CN 114391898A CN 202210126455 A CN202210126455 A CN 202210126455A CN 114391898 A CN114391898 A CN 114391898A
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- 230000000903 blocking effect Effects 0.000 title claims abstract description 36
- 238000007789 sealing Methods 0.000 claims abstract description 32
- 244000137852 Petrea volubilis Species 0.000 claims abstract description 24
- 230000009471 action Effects 0.000 claims abstract description 16
- 238000001125 extrusion Methods 0.000 claims abstract description 4
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 239000004698 Polyethylene Substances 0.000 claims description 5
- 229920000573 polyethylene Polymers 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 4
- -1 polyethylene Polymers 0.000 claims description 4
- 239000000463 material Substances 0.000 claims 1
- 239000012528 membrane Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 9
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/08—Accessories or related features not otherwise provided for
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
- A61B2017/00292—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
- A61B2017/00292—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means
- A61B2017/00336—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means with a protective sleeve, e.g. retractable or slidable
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/08—Accessories or related features not otherwise provided for
- A61B2090/0801—Prevention of accidental cutting or pricking
- A61B2090/08021—Prevention of accidental cutting or pricking of the patient or his organs
Abstract
The invention discloses a variable-rigidity folding and unfolding carrier based on an elastic corrugated hose and a layer blocking principle, which comprises an elastic corrugated hose with an octagonal star-shaped cross section, wherein the elastic corrugated hose is wrapped in a sealing cavity with an annular cross section; the sand paper blocking layer is formed by covering sixteen sides of the elastic corrugated hose with inner-layer sheet-shaped sand paper and arranging the outer-layer sheet-shaped sand paper at eight convex corners of the elastic corrugated hose in a staggered mode. When the air in the sealing cavity is pumped out, under the action of the external atmospheric pressure, the sand paper blocking layer is compressed, the extrusion force and the friction force between the flaky sand paper are increased, and the rigidity of the access carrier is increased; when the inflatable air bag is inflated, the elastic corrugated hose is unfolded under the action of radial force, and the access carrier is in a large-diameter state.
Description
Technical Field
The invention relates to the technical field of natural orifice surgical instruments, in particular to a variable-rigidity folding and unfolding path carrier based on an elastic corrugated hose and a layer blocking principle.
Background
With advances in technology, surgery has transitioned from open surgery to minimally invasive techniques. At present, noninvasive Surgery represented by Natural Orifice Endoscopic Surgery (NOTES) becomes a research hotspot. The natural orifice endoscopic surgery is a brand new minimally invasive surgery paradigm which enters mediastinum, thoracic cavity or abdominal cavity for disease diagnosis and treatment through natural orifices such as esophagus, stomach, colon (rectum), vagina, bladder and the like. Compared with the traditional open type operation, the natural orifice endoscopic operation has the advantages of less pain, no scar on the body surface, small wound, quick recovery and the like, and better conforms to the modern super minimally invasive concept.
Because the anatomical path of the human body cavity is long and narrow and curved, the angle and the direction need to be passively adjusted to adapt to the physiological curvature of the human body natural cavity in the process that a doctor operates the long and thin NOTES surgical instrument to be placed in the human body natural cavity. The NOTES surgical instrument body structure is typically less than 20mm in outside diameter, taking into account the anatomical dimensions of the natural body lumen. Even so, advancement of the NOTES surgical instrument during implantation and whipping during surgery can cause high frequency friction and even tugging (especially in physiologically curved locations) with the soft biological tissue within the cavity. Since there is no external force to support and isolate the NOTES surgical instrument from the tissue within the cavity, the high frequency intense contact causes complications such as mucosal rupture or bleeding. In addition, long distance transmission and operation place special demands on the stiffness of NOTES surgical instruments.
Due to the complex shape of the human digestive tract anatomy, it is desirable that the NOTES surgical instrument be sufficiently "flexible" during implantation to accommodate the physiological curvature of the digestive tract and reduce bruising of surrounding tissue. When the NOTES surgical instrument reaches the focus position, the NOTES surgical instrument needs to have enough rigidity to keep a stable pose, and reliable support guarantee is provided for the diagnosis and treatment operation.
In view of the above, it is important to design a folding and unfolding path carrier with variable stiffness as an auxiliary tool for NOTES surgical instruments by applying new principles and methods to solve the above problems.
Disclosure of Invention
The present invention aims to overcome the technical defects in the prior art and provide a variable stiffness folding entry way carrier based on the principle of elastic corrugated hose and layer blocking. Under the soft and small-diameter state, the approach carrier can adapt to the physiological bending of the natural cavity of the human body and can be safely put in and pulled out; when the device is placed in a target position, the access carrier can be changed into a rigid and large-diameter state, the shape of the access carrier can be locked, and a stable and reliable access channel is provided for guiding and supporting NOTES surgical instruments. In addition, the access carrier can isolate the NOTES surgical instrument from the natural cavity of the human body, so that the force of the NOTES surgical instrument is not directly applied to the natural cavity of the human body, and the safety of surgical operation can be improved.
The technical scheme adopted for realizing the purpose of the invention is as follows:
a variable stiffness tuck-deployment road carrier based on the principle of elastic pleat hose and layer occlusion, comprising:
the elastic corrugated hose is wrapped in a sealing cavity with an annular cross section, sheet-shaped sand paper covers the outer surface of the elastic corrugated hose to form a sand paper blocking layer, the sealing cavity is formed in the sealing cavity after an inner sealing film and an outer sealing film which form a cylinder shape and connecting pieces at two ends of the inner sealing film and the outer sealing film are connected together in a sealing mode, and an expansion air bag is arranged in the inner sealing film; when the inflatable air bag is inflated, the radial size of the inflatable air bag is increased;
the cross section of the elastic corrugated hose is in an octagonal star shape, has certain ductility and elasticity, and is unfolded to be in a large-diameter state under the action of external force; when no external force is applied, the elastic force of the elastic force retracts to be in a small-diameter state; the abrasive paper blocking layer is formed by distributing and covering sixteen side surfaces of the elastic corrugated hose with inner-layer sheet-shaped abrasive paper and arranging eight convex angles of the elastic corrugated hose with outer-layer sheet-shaped abrasive paper in a staggered mode;
when the air in the sealing cavity is pumped out by the air pumping device, the air pressure in the sealing cavity is reduced, the sand paper blocking layer is pressed tightly under the action of the external atmospheric pressure, and the extrusion force and the friction force between the sheet-shaped sand paper are increased, so that the rigidity of the access carrier is increased; when the inflatable air bag is inflated, the elastic corrugated hose is unfolded under the action of radial force, and the access carrier is in a large-diameter state.
According to the technical scheme, the variable-rigidity folding-unfolding carrier based on the elastic folding hose and the layer blocking principle has at least one or part of the following beneficial effects:
1. the elastic corrugated hose is in an octagonal section shape, the sheet-shaped abrasive paper is distributed in a staggered mode, the inlet carrier has large folding and retracting ratio and elasticity, and large-curvature bending can be realized to adapt to a physiological bending structure of a natural orifice of a human body.
2. The entry carrier can pass through a narrow cavity channel bent by a human body in a low-rigidity and small-diameter state, and then is converted into a high-rigidity and large-diameter state under the action of an expansion air bag and an air exhaust device.
3. The access carrier can be converted into a large-diameter and high-rigidity state after being placed at a target position, and the NOTES surgical instrument can be safely placed in a channel without resistance. In the operation process, the access carrier can provide safe and reliable guarantee, and can protect the human body cavity from physical injuries such as stabbing and scratching of NOTES surgical instruments.
4. After the NOTES surgical instrument performs surgical operation, the access carrier can be restored to a small-diameter and low-rigidity state under the action of elasticity of the access carrier, so that the access carrier can be safely withdrawn from a human body cavity, and obvious discomfort can not be caused to a patient.
5. The access carrier can change the rigidity of the access carrier through the adjusting valve, and provides a stable support for NOTES surgical instruments so as to improve the stability and safety of surgical operations.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a variable stiffness folding and unfolding road carrier based on the principle of elastic corrugated hose and layer blocking according to an embodiment of the present invention.
Fig. 2 is a cross-sectional view taken along line a-a of fig. 1.
FIG. 3 is a schematic diagram of the construction of an embodiment of the present invention based on an elastic corrugated hose and a layer blocking principle for an elastic corrugated hose with a variable stiffness folding and unfolding carrier
Fig. 4 is a cross-sectional view taken along line D-D of fig. 3.
Fig. 5 is a schematic diagram of the construction of an elastic corrugated hose with an inner sandpaper attached to the surface of a carrier of a variable stiffness fold-out road according to an embodiment of the present invention based on the principle of elastic corrugated hose and layer blocking.
Fig. 6 is a cross-sectional view taken along line B-B of fig. 5.
FIG. 7 is a schematic representation of a blocking layer of a variable stiffness collapsible road carrier based on the principle of elastic bellows and layer blocking according to an embodiment of the present invention
Fig. 8 is a cross-sectional view taken along line C-C of fig. 7.
FIG. 9 is a system hardware configuration diagram of a variable stiffness tuck-in road carrier based on the principle of elastic bellows and layer occlusion according to an embodiment of the present invention.
FIG. 10 is a schematic diagram of the radial dimension and stiffness variation of a variable stiffness bellows carrier based on the principle of elastic bellows and layer occlusion according to an embodiment of the present invention.
FIG. 11 is a flow chart of a variable stiffness collapsible approach carrier for transluminal surgery based on the principle of elastic bellows and layer occlusion according to an embodiment of the present invention.
Fig. 12 is a schematic diagram of an application of the variable stiffness folded incoming road carrier based on the principle of elastic corrugated hose and layer blocking according to the embodiment of the present invention.
Symbolic illustrations in the drawings:
1-an entry carrier; 2-inflating the balloon; 3-pressure regulating valve; 4-a vacuum pump; 5-NOTES surgical instruments;
1-1-polyethylene film; 1-2-connectors; 1-3-an air extraction pipeline; 1-4-elastic corrugated hose; 1-5-inner layer sand paper; 1-6-outer sand paper; 1-7-sandpaper blocking layer.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In this specification, the various embodiments described below which are used to describe the principles of the present invention are by way of illustration only and should not be construed in any way to limit the scope of the invention. The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of exemplary embodiments of the invention as defined by the claims and their equivalents. The following description includes various specific details to aid understanding, but such details are to be regarded as illustrative only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Moreover, descriptions of well-known functions and constructions are omitted for clarity and conciseness. Throughout the drawings, the same reference numerals are used for similar functions and operations.
Fig. 1 is a schematic diagram of the overall structure of a variable stiffness folding and unfolding road carrier based on the principle of elastic corrugated hose and layer blocking according to an embodiment of the present invention. Referring to fig. 1 to 2, the variable-rigidity folding and unfolding path carrier is composed of a polyethylene film 1-1, a connecting piece 1-2, an air suction pipeline 1-3, an elastic corrugated hose 1-4, inner-layer abrasive paper 1-5 and outer-layer abrasive paper 1-6, and the inner-layer abrasive paper 1-5 and the outer-layer abrasive paper 1-6 form abrasive paper blocking layers 1-7. The inner and outer polyethylene films 1-1 are connected with the connecting pieces 1-2 at two ends to form a sealed cavity with an annular transverse section. The elastic corrugated hose 1-4 and the sand paper blocking layer 1-7 thereon are wrapped by the outer polyethylene film 1-1 and are integrally placed in the sealed cavity, and air in the sealed cavity can be pumped out through a pumping pipeline 1-3 connected to a connecting piece 1-2 to form a negative pressure state, wherein the connecting piece 1-2 can be 3D printed.
The two end connectors forming the sealed cavity may be the same or different, as long as the two end sealing is achieved, and are not limited to the shape or structure of the embodiment in the figures.
Fig. 3-8 are schematic and corresponding cross-sectional views, respectively, of an embodiment of an elastic corrugated hose and sandpaper blocking layer of a variable stiffness folding inlet carrier based on the principles of elastic corrugated hose and layer blocking. The inner-layer sand paper 1-5 is bonded on sixteen outer side faces of the elastic corrugated hose 1-4 in a full-plane mode through soft glue, the size of the inner-layer sand paper 1-5 is 2mm x 15mm (the inner-layer sand paper can be designed according to specific conditions and is not limited to the specific conditions), the inner-layer sand paper can be multiple blocks, the inner-layer sand paper is arranged along the axial direction of each side face and is arranged to the other end from one end, and adjacent sand paper on the previous side face is connected with each other or is reserved with certain gaps. The outer abrasive paper 1-6 is adhered to the convex angle of the elastic corrugated hose 1-4 by using the single side edge of soft glue, the basic size of the outer abrasive paper 1-6 is 5mm 15mm (which can be designed according to specific conditions and is not limited to the specific situation), the outer abrasive paper is multiple, and the outer abrasive paper is arranged from one end to the other end along the axial direction, wherein a certain gap is reserved between two adjacent outer abrasive papers 1-6 in the axial same straight line direction for separation, the adjacent outer abrasive papers 1-6 in the axial different straight line directions are staggered and partially overlapped to cover the gap part between the two adjacent outer abrasive papers, and the outer abrasive paper is arranged like roof tiles, so that the access carrier has good flexibility in a natural state.
In a preferred embodiment, the inner side of each of the outer sandpaper layers is connected at a position near the end to the outer top of a lobe of one of the elastically corrugated hoses 1-4 and extends across an adjacent lobe in a direction above the third lobe.
FIG. 9 is a system hardware configuration diagram of a variable stiffness tuck-in road carrier based on the principle of elastic bellows and layer occlusion according to an embodiment of the present invention. One section of the air pumping pipeline 1-3 is connected with the sealing cavity of the variable rigidity folding and unfolding pipeline carrier, and the other end of the air pumping pipeline is connected with a vacuum pump 4 through a pressure regulating valve 3. The pressure regulating valve 2 controls the rigidity of the variable-rigidity folding-unfolding path carrier by controlling the negative pressure intensity of the sealing cavity. The inflatable balloon 2 is pre-positioned in the medial passage of the access carrier and controls the radial dimension of the variable stiffness fold-out access carrier.
FIG. 10 is a schematic diagram of the radial dimension and stiffness variation of a variable stiffness bellows carrier based on the principle of elastic bellows and layer occlusion according to an embodiment of the present invention. The radial dimension of the variable stiffness deployment path carrier can be controlled by the inflatable balloon 2. In the initial state, the elastic corrugated hose 1-4 is in a retraction state, and the access carrier is in a low-rigidity and small-diameter state. When the inflatable air bag 2 is inflated, the elastic corrugated hoses 1-4 are unfolded to be in a large-diameter state under the action of the inflatable air bag 2. At the moment, the sealed cavity of the access carrier is pumped, the inner-layer sand paper 1-5 and the outer-layer sand paper 1-6 are pressed tightly by the inner sand paper blocking layer 1-7 under the action of the external atmospheric pressure, the extrusion force and the friction force between the sand papers are increased, and the rigidity of the access carrier is increased, so that the access carrier is in a high-rigidity and large-diameter state. When the pressure in the sealing cavity is recovered to be atmospheric pressure, the inlet carrier retracts to be in a small-diameter and low-rigidity state under the action of elastic restoring force of the elastic corrugated hoses 1-4.
FIG. 11 is a flow chart of the variable stiffness collapsible approach carrier for natural transluminal endoscopic surgery based on the principle of elastic bellows and layer occlusion according to an embodiment of the present invention, including the following steps.
S1: in a natural state, the approach carrier is in a state of low rigidity and small diameter, and the approach carrier is placed in a natural cavity of a human body. The access carrier can flexibly and passively adapt to the physiological bending of the natural cavity of the human body and reach the focus, and the implantation process can not cause obvious discomfort to the patient.
S2: and applying positive pressure to the expansion air bag in the middle channel of the access carrier to ensure that the access carrier is unfolded to be in a large-diameter state so as to facilitate the smooth passing of NOTES surgical instruments in subsequent operations.
S3: and applying negative pressure to the sealing cavity of the inlet carrier through the air exhaust device to enable the inlet carrier to be in a high-rigidity state. The abrasive paper blocking layer in the access carrier is pressed tightly under the action of the external atmospheric pressure, and the rigidity of the access carrier is increased and the stable shape is kept by the friction force between the abrasive paper blocking layers.
S4: the positive pressure of the inflated balloon is removed and withdrawn from the access carrier, and a NOTES surgical instrument is inserted through the medial channel of the access carrier to perform the surgical procedure. Under the action of negative pressure, the sandpaper blocking layer can enable the middle channel of the access carrier to keep a large-diameter state. During the process of placing the NOTES surgical instrument, the access carrier can protect the cavity tissue from physical injuries such as puncture and scratch of the NOTES surgical instrument. In addition, the access carrier can support NOTES surgical instruments when performing a surgical procedure, thereby improving the accuracy of the surgical procedure.
S5: after the operation is finished, withdrawing the NOTES surgical instrument, removing the negative pressure of the sealing cavity, and retracting the access carrier into a state of small diameter and low rigidity under the elastic restoring force of the elastic corrugated hose.
S6: the approach carrier is extracted from the natural cavity of the human body. Under the natural state, the approach carrier is in a low-rigidity and small-diameter state, and can be flexibly drawn out from the natural orifice of the human body, and the patient cannot be obviously uncomfortable during the drawing-out process.
Fig. 12 illustrates the mating relationship between the access carrier 1 and NOTES surgical instrument 5.
It can be seen from the above embodiments that the variable-stiffness folding and unfolding path carrier based on the elastic corrugated hose and the layer blocking principle in the embodiments of the present invention has good compliance in a natural state, can realize large-curvature bending, and can adapt to physiological bending of a natural orifice of a human body. After the access carrier is placed into a natural cavity of a human body, the air bag is expanded to enable the access carrier to be in a large-diameter state, and the rigidity of the access carrier can be adjusted through the air exhaust device and the pressure regulating valve to enable the access carrier to be in a high-rigidity state. At this time, the access carrier in a large diameter, high stiffness state can provide a stable, safe access channel for NOTES surgical instruments. In the process of placing the NOTES surgical instrument, the access carrier can protect the body cavity tissue from physical injuries such as stabbing injury and scratching of the NOTES surgical instrument. In the operation process, the access carrier can provide stable support for NOTES surgical instruments, and the safe operation of the operation is guaranteed. After the operation is finished, the access carrier can be retracted into a small-diameter low-rigidity rotating state under the restoring force action of the elastic folded hose by adjusting the negative pressure of the sealing cavity, so that the access carrier can be safely extracted from the body cavity.
While there have been shown and described the fundamental principles and essential features of the invention and advantages thereof, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof;
the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. The variable-rigidity folding and unfolding path carrier based on the elastic corrugated hose and the layer blocking principle is characterized by comprising an elastic corrugated hose wrapped in a sealing cavity with an annular cross section, wherein the outer surface of the elastic corrugated hose is covered with sheet-shaped abrasive paper to form an abrasive paper blocking layer, the sealing cavity is formed in the sealing cavity after an inner sealing film and an outer sealing film which are cylindrical and connecting pieces at two ends of the inner sealing film and the outer sealing film are connected together in a sealing manner, and an expansion air bag is arranged in the inner sealing film; when the inflatable air bag is inflated, the radial size of the inflatable air bag is increased;
the cross section of the elastic corrugated hose is in an octagonal star shape, has certain ductility and elasticity, and is unfolded to be in a large-diameter state under the action of external force; when no external force is applied, the elastic force of the elastic force retracts to be in a small-diameter state; the abrasive paper blocking layer is formed by distributing and covering sixteen side surfaces of the elastic corrugated hose with inner-layer sheet-shaped abrasive paper and arranging eight convex angles of the elastic corrugated hose with outer-layer sheet-shaped abrasive paper in a staggered mode;
when the air in the sealing cavity is pumped out by the air pumping device, the air pressure in the sealing cavity is reduced, the sand paper blocking layer is pressed tightly under the action of the external atmospheric pressure, and the extrusion force and the friction force between the sheet-shaped sand paper are increased, so that the rigidity of the access carrier is increased; when the inflatable air bag is inflated, the elastic corrugated hose is unfolded under the action of radial force, and the access carrier is in a large-diameter state.
2. The carrier for a variable stiffness folded and unfolded path based on the flexible corrugated hose and layer blocking principle according to claim 1, wherein said connecting member is connected with a suction device, and a pressure regulating valve is further connected between said suction device and said connecting member for regulating the negative pressure in said sealed cavity.
3. The carrier for a variable stiffness folded and unfolded path according to claim 1, wherein the inner sheet-like abrasive paper distributed on the side of the elastically folded flexible tube is bonded to the elastically folded flexible tube in a full-surface manner by soft glue, and the sheet-like abrasive paper distributed on the convex angle of the elastically folded flexible tube is partially bonded to the elastically folded flexible tube by soft glue.
4. The variable stiffness folded deployment path carrier based on the principle of elastic corrugated hose and layer blocking of claim 1 wherein the elastic corrugated hose is made of soft gel material.
5. The flexible pleated hose and layer blocking principle based variable stiffness tuck-in road carrier of claim 1, characterized in that the inflatable bladder is made of TPU film.
6. The flexible pleated hose and layer blocking based variable stiffness tuck-in road carrier of claim 1, characterized in that the sealing membrane is made of polyethylene film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210126455.2A CN114391898B (en) | 2022-02-10 | 2022-02-10 | Variable-rigidity folding access carrier based on elastic corrugated hose and layer blocking principle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210126455.2A CN114391898B (en) | 2022-02-10 | 2022-02-10 | Variable-rigidity folding access carrier based on elastic corrugated hose and layer blocking principle |
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| CN114391898A true CN114391898A (en) | 2022-04-26 |
| CN114391898B CN114391898B (en) | 2024-02-23 |
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| CN114391898B (en) | 2024-02-23 |
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