CN215534176U - Disposable endoscope and outer tube of insertion part thereof - Google Patents

Abstract

A disposable endoscope and an outer tube of an insertion portion thereof, the outer tube including an inner tube, a braided wire and a heat-shrinkable tube. The inner tube has an inner lumen channel disposed axially along the inner tube. The limiting tube, the traction rope, the instrument tube and the like can be accommodated in the inner cavity. The braided wire is wrapped on the outer peripheral surface of the inner tube, and then the heat-shrinkable tube is sleeved and wrapped on the outer periphery of the braided wire. The structure is simpler, the processing difficulty is lower, the cost can be further reduced, and the endoscope is more suitable for being applied to a disposable endoscope.

Description

Disposable endoscope and outer tube of insertion part thereof

Technical Field

The present application relates to medical devices, and more particularly, to a disposable endoscope and an outer tube of an insertion portion thereof.

Background

Endoscopes are widely used in medical and industrial instruments for extending into some long lumens to acquire image data of related objects, for example, extending into the esophagus or other lumens of a human body through the endoscope to acquire image data of biological tissues or other parts inside the human body in a medical environment.

An endoscope that can be reused in general generally has an insertion portion and a control portion. The inserting part has the outer tube, is equipped with the chamber in the outer tube and says, and some apparatus tools, haulage rope and electricity connecting wire etc. can pass the chamber way, and the crooked condition of inserting part is controlled through the haulage rope to the control part to realize that the inserting part is crooked to the direction that needs, in order to reach the purpose that needs, like the accurate detection and the observation etc. to human body position.

An endoscope able to be used repeatedly is composed of a plastic tube, a layer of metal braided wire, and a layer of hot-fusible tube. When the outer pipe is manufactured, the heat shrinkage pipe must be heated on the hot melting pipe, then the heat shrinkage pipe is heated to melt, the heat shrinkage pipe shrinks to generate a wrapping force, a melting layer of the hot melting pipe and the metal braided wire are integrated, and then the heat shrinkage pipe is torn off. After the outer tube is subjected to the heat shrinkage process of the heat shrinkage tube, the outer tube has good torsion resistance, good bending property and good rebound resilience, and can meet the repeated use requirement of the endoscope. However, the outer tube has a complex structure and a complex manufacturing process, which results in high cost and is not suitable for application to a disposable endoscope.

Disclosure of Invention

The present application provides a disposable endoscope and an outer tube of an insertion portion thereof to demonstrate a new structure of the outer tube.

In view of the above object, the present application provides in one embodiment an outer tube of an insertion portion of a disposable endoscope, including:

the inner tube is provided with an inner cavity channel which is arranged along the axial direction of the inner tube;

the weaving silk is wrapped on the peripheral surface of the inner tube;

and the heat shrink tube is sleeved and wrapped on the periphery of the weaving wire.

In one embodiment, the inner tube is a plastic tube.

In one embodiment, the braided wire is a metal braided wire.

In view of the above, in one embodiment, the present application provides a disposable endoscope, including an insertion portion and a control portion, the insertion portion including an outer tube, a limiting tube, a traction rope, and an instrument tube, the outer tube having an inner tube, a braided wire, and a heat shrink tube, the inner tube having an inner lumen, the inner lumen being disposed along an axial direction of the inner tube; the outer peripheral surface of the inner tube is wrapped by the braided wire; the heat-shrinkable tube is sleeved and wrapped on the periphery of the braided wire; the limiting tube and the instrument tube are arranged in the inner cavity channel, the traction rope is arranged in the limiting tube, and the control part is connected with the traction rope and used for controlling the bending angle of the insertion part.

In one embodiment, the inner tube is a plastic tube.

In one embodiment, the braided wire is a metal braided wire.

The outer tube according to the above embodiment includes an inner tube, a braided wire, and a heat shrinkable tube. The inner tube has an inner lumen channel disposed axially along the inner tube. The limiting tube, the traction rope, the instrument tube and the like can be accommodated in the inner cavity. The braided wire is wrapped on the outer peripheral surface of the inner tube, and then the heat-shrinkable tube is sleeved and wrapped on the outer periphery of the braided wire. The structure is simpler, the processing difficulty is lower, the cost can be further reduced, and the endoscope is more suitable for being applied to a disposable endoscope.

Drawings

Fig. 1 is a schematic transverse cross-section of an outer tube according to a first embodiment of the present application.

Detailed Description

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

The present application provides a disposable endoscope that is used a limited number of times, unlike a reusable endoscope. The disposable endoscope generally includes an insertion portion having a strip-shaped outer tube through which some instrument tools (such as optical fibers, baskets, guide wires, injection needles, etc.), a traction rope, and electrical connection wires (such as electrical connection wires for supplying power to the light emitting unit and the image capturing unit) and the like can pass to achieve related objects, a control portion, and the like.

Referring to fig. 1, the outer tube includes aninner tube 100, abraid wire 200, and aheat shrinkable tube 300. Fig. 1 shows a schematic cross-sectional view of the outer tube, i.e. a radial section of the outer tube, which is perpendicular to the axial direction of the outer tube.

Theinner tube 100 can be a plastic tube, and theinner tube 100 is made of plastic, so that labor is saved during bending and the resilience is good. In one embodiment, theinner tube 100 can be manufactured by an extrusion process using an extruder, which is convenient and inexpensive to manufacture.

Theinner tube 100 has aninner channel 110, and theinner channel 110 is arranged along the axial direction of theinner tube 100. Some instrument tools (e.g., fiber optics, baskets, guide wires, needles, etc.), pull cords, and electrical connections (e.g., electrical connections to power the light emitting unit and the image acquisition unit), etc. can be passed through thelumen 110.

In one embodiment, the insertion portion further comprises a stop tube, a pull cord, and an instrument tube disposed within thelumen 110 for placement of instrument tools, pull cords, and the like. The haulage rope is located spacing intraductal, and the control part is connected with the haulage rope, through pulling the bending angle of haulage rope control insertion portion. The instrument tools (such as optical fibers, baskets, guide wires, injection needles, etc.) can extend into the instrument tube, such as the injection needles extend into the instrument tube for administration, anesthesia and water injection.

The electrical connection lines (e.g., electrical connection lines for supplying power to the light emitting unit and the image capturing unit) are received in theinner channel 110 to supply power to the light emitting unit (e.g., an LED lamp) and the image capturing unit (e.g., a camera) and perform electrical signal transmission. In some embodiments, a cable tube may be provided that specifically receives the electrical connection wires to accommodate the electrical connection wires. In some embodiments, the electrical connection wires may also be received directly within thelumen 110 without a separate cable tube.

The braidedwire 200 is wrapped around the outer circumferential surface of theinner tube 100, for example, wound around the outer surface of theinner tube 100. To increase strength, the braidedwire 200 is a metal braided wire in one embodiment. Theheat shrinkable tube 300 is fitted over and wrapped around the outer circumference of theweaving wire 200. By heat shrinkage (heat shrinks theheat shrinkable tube 300 to generate a packing force), theheat shrinkable tube 300 packs thewoven wire 200 and theinner tube 100. The wrapping effect of theheat shrink tube 300 and the braidedwire 200 is used to improve the twisting resistance of theinner tube 100, that is, when one end of theinner tube 100 is twisted, the other end of theinner tube 100 can generate consistent or close twisting change, thereby avoiding the influence of the material of theinner tube 100 on the transmission of twisting effect.

Compared with the existing endoscope, the outer tube of the embodiment omits a hot-melt tube, and the heat-shrink tube 300 is directly wrapped on the braidedwire 200, so that the torsion resistance of theinner tube 100 is improved, and the outer diameter of the whole outer tube can be reduced, so that the whole outer tube is thinner, and the discomfort of the endoscope inserted into the human body is reduced.

The present embodiment simplifies a reusable endoscope structure, omits a heat fusion pipe to reduce manufacturing costs and assembly difficulty, and enables the endoscope structure to be applied to a disposable endoscope.

The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.

Claims (6)

1. An outer tube of an insertion portion of a disposable endoscope, comprising:

the inner tube is provided with an inner cavity channel which is arranged along the axial direction of the inner tube;

the weaving silk is wrapped on the peripheral surface of the inner tube;

and the heat shrink tube is sleeved and wrapped on the periphery of the weaving wire.

2. The outer tube of claim 1, wherein the inner tube is a plastic tube.

3. An outer tube according to claim 1 or 2, wherein the braided wire is a metal braided wire.

4. A disposable endoscope is characterized by comprising an insertion part and a control part, wherein the insertion part comprises an outer tube, a limiting tube, a traction rope and an instrument tube, the outer tube is provided with an inner tube, a braided wire and a heat-shrinkable tube, the inner tube is provided with an inner cavity channel, and the inner cavity channel is arranged along the axial direction of the inner tube; the outer peripheral surface of the inner tube is wrapped by the braided wire; the heat-shrinkable tube is sleeved and wrapped on the periphery of the braided wire; the limiting tube and the instrument tube are arranged in the inner cavity channel, the traction rope is arranged in the limiting tube, and the control part is connected with the traction rope and used for controlling the bending angle of the insertion part.

5. The disposable endoscope as defined in claim 4 wherein said inner tube is a plastic tube.

6. The disposable endoscope of claim 4 or 5, wherein said braided wire is a metal braided wire.

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