CN115607810A

CN115607810A - Adjustable bent sheath

Info

Publication number: CN115607810A
Application number: CN202211323726.XA
Authority: CN
Inventors: 孙辉; 胡登脉; 王世杰; 赵闯; 李志刚; 张坤
Original assignee: Shanghai Weiqi Medical Instrument Co ltd
Current assignee: Shanghai Weiqi Medical Instrument Co ltd
Priority date: 2022-10-27
Filing date: 2022-10-27
Publication date: 2023-01-17

Abstract

The invention provides an adjustable bending sheath, which belongs to the field of medical equipment and particularly comprises a sheath tube, a sheath tube body and a pull wire, wherein the sheath tube body is provided with a pull wire; the handle, including fixed the base of sheath pipe body, cover establish at the base and be close to the slide rail of sheath pipe body one end, with slide rail complex slider, setting are in the base with screw thread section between the slider and with the knob of slider laminating, wherein, it is in to act as go-between the setting the sheath pipe body is close to the one end of base, act as go-between pass the knob with slider fixed connection, the slide rail be provided with in preset position department with at least one stopper of screw thread fit of screw thread section, the screw thread section with the slider screw thread is screwed, and the cooperation is realized the spiral section with the rigid connection of knob. Through the processing scheme of the application, the idle stroke can be reduced, and the one-way adjustability is realized.

Description

Adjustable bent sheath

Technical Field

The invention relates to medical equipment, in particular to an adjustable bending sheath.

Background

The bending adjusting sheath is a sheath tube component applied to the interventional and minimally invasive treatment operation process and consists of two parts, namely a sheath tube and a handle. In operation, the sheath can be manipulated by the knob of the sheath to bend the distal end of the sheath within a certain angle. After the sheath tube is bent, the head end of the sheath tube can point to a target position, so that the operation of bending a path in an operation is facilitated. But use the curved sheath in-process of adjustable, often can appear the condition that the sheath pipe did not respond when beginning to rotate the handle knob, the knob need rotate 0.5 to 1 circle, the sheath pipe just begins the bending, influences the operation, is unfavorable for the slider location, leads to the sheath pipe to act as go-between the position and has the error.

Disclosure of Invention

Therefore, to overcome the above-mentioned drawbacks of the prior art, the present invention provides an adjustable curved sheath that can reduce the idle stroke and is adjustable in one direction.

In order to achieve the above object, the present invention provides an adjustable bending sheath, comprising: the sheath comprises a sheath body and a pull wire; the handle, including fixed the base of sheath pipe body, cover establish at the base and be close to the slide rail of sheath pipe body one end, with slide rail complex slider, setting are in the base with screw thread section between the slider and with the knob of slider laminating, wherein, it is in to act as go-between the setting the sheath pipe body is close to the one end of base, act as go-between pass the knob with slider fixed connection, the slide rail be provided with in preset position department with at least one stopper of screw thread fit of screw thread section, the screw thread section with the slider screw thread is screwed, and the cooperation is realized the spiral section with the rigid connection of knob.

In one embodiment, the sliding block is provided with a through hole, the pull wire penetrates through the through hole, the knob is provided with a pull wire channel matched with the pull wire, and the pull wire channel is communicated with the through hole when the knob is rotated to an angle; the stay wire is also arranged in the stay wire channel in a penetrating way.

In one embodiment, the pull wire and the sheath body are integrally formed.

In one embodiment, the length of the pull wire is less than the distance between the fixed end of the pull wire and the base.

In one embodiment, the inner wall of the threaded section is provided with an internal thread and the slide block is provided with an external thread.

In one embodiment, the limiting block is a circular-ring-shaped convex rib and is arranged around the outer circumference of the slide rail.

In one embodiment, the slide rail is provided with a plurality of parallel limiting blocks at preset positions, and the distance between the limiting blocks is the thread pitch multiple of the thread sections.

Compared with the prior art, the invention has the advantages that: knob and the split type design of spiral section can be fixed with knob and slider earlier when using, then act as go-between on the fixed sheath pipe, and the sheath pipe is for straightening the state this moment, and the sheath pipe is acted as go-between also for the state of just not atress, fixes screw thread section and knob at last, fixes the slider location earlier, makes clear and makes clear the sheath pipe position of acting as go-between, avoids the fixed position of the relative sheath pipe body of slider improper, produces the idle stroke. And the assembly is simple, and the accuracy of the bending stroke of the sheath control is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural view of an adjustable curved sheath in an embodiment of the invention;

FIG. 2 is a schematic view showing a structure of a sheath according to an embodiment of the present invention;

FIG. 3 is a schematic view of the structure of a handle in an embodiment of the present invention;

FIG. 4 is a cross-sectional view of a handle in an embodiment of the present invention;

FIG. 5 is an initial installation view of a handle in an embodiment of the present invention;

FIG. 6 is a schematic view of a bend adjustment of a handle in an embodiment of the invention.

Detailed Description

The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The present application is capable of other and different embodiments and its several details are capable of modifications and/or changes in various respects, all without departing from the spirit of the present application. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. 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.

It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present application, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number and aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present application, and the drawings only show the components related to the present application rather than the number, shape and size of the components in actual implementation, and the type, amount and ratio of the components in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.

In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.

As shown in fig. 1, the present embodiment provides an adjustable bending sheath, which includes a sheath tube 1 and a handle 2. The distal end of the sheath 1 can enter the handle 2 and extend from the other end.

As shown in fig. 2, the sheath 1 includes a sheath body 11 and a pulling wire 12.

As shown in fig. 3 and 4, the handle 2 includes a knob 21, a threaded section 22, a slider 23, a slide rail 24, and a base 25.

The base 25 fixes the sheath body 11. The pull wire 12 is provided at one end of the sheath body 11 near the base 25.

The slide rail 24 is sleeved on one end of the base 25 close to the sheath tube body.

The slider 23 can be engaged with the slide rail 24 and moved on the slide rail 24.

Threaded section 22 is disposed between base 25 and slider 23 and is movable on slide 24 as desired. The thread on the thread section 22 can be external thread or internal thread, and the slide block 23 is correspondingly provided with internal thread or external thread. In one embodiment, as shown in figure 3, the inner wall of the threaded section 22 is provided with an internal thread and the slider 23 is provided with an external thread.

The knob 21 may be attached to the slider 23. The pull wire 12 can pass through the knob 21 and be fixedly connected with the slide block 23.

As shown in fig. 5, the slide rail 24 is provided at a predetermined position with at least one stopper 26 engaged with the thread of the threaded section 22. A stop 26 may be threadably engaged with the threaded segment 22 for limiting movement of the threaded segment 22 on the slide rail 24. The threaded section 22 and the sliding block 23 can be screwed tightly, and the rigid connection between the threaded section 22 and the knob 21 is realized in a matching way. Stop 26 may be a thickened area of rail 24 itself or may be an additional component secured to rail 24. The shape of the stop 26 may be a square bump or other shape, so long as it is adapted to the thread of the thread segment 22.

As shown in fig. 5, in the initial assembly stage, the pull wire 12 in the sheath 1 passes through the knob 21 and is fixed on the slider 23, at this time, the pull wire 12 is in a straightened state, the sheath body 11 is not bent, the slide rail 23 is attached to the knob 21, at this time, the slider is positioned, the sheath is in a straightened state, and the sheath pull wire is also in a state of being not stressed.

As shown in fig. 6, after the knob 21 is attached to the slider 23, the threaded section 22 is screwed to the slider 23, and then the threaded section 22 is rigidly connected to the knob 21, so that the knob of the adjustable bending sheath can be rotated as required. Turning the knob 21 the sheath starts to bend instantly. The whole process can avoid the idle stroke caused by the improper fixing position of the sliding block 23 relative to the sheath tube 1.

Above-mentioned curved sheath of can adjusting, knob and the split type design of spiral section can be fixed with knob and slider earlier when using, then act as go-between on the fixed sheath pipe, and the sheath pipe is for straightening the state this moment, and the sheath pipe is acted as go-between also for the state of just not atress, fixes screw thread section and knob at last, fixes the slider location earlier, makes clear and makes clear the sheath pipe position of acting as go-between, avoids the fixed position of the relative sheath pipe body of slider improper, produces the idle stroke. And the assembly is simple, and the accuracy of the bending empty stroke of the sheath control is improved.

In one embodiment, the slide block 23 is provided with a through hole, the pull wire 12 is arranged in the through hole in a penetrating way, the knob 21 is provided with a pull wire channel matched with the pull wire, and the pull wire channel is communicated with the through hole when being rotated to an angle; the pull wire 12 is also inserted into the pull wire passage. Through the stay wire passage, the rotation of the stay wire 12 can be limited, and the stay wire 12 is protected from being damaged.

In one embodiment, the pull wire and the sheath body are integrally formed. The stay wire and the sheath tube body can be made of plastic materials, a multilayer structure is not required to be arranged, and the force conduction effect among the knob 21, the thread section 22, the sliding block 23, the stay wire 12 and the sheath tube body 11 is better.

In one embodiment, the limiting block is a circular bead and is arranged around the outer circumference of the slide rail.

In one embodiment, the slide rail is provided with a plurality of parallel limiting blocks at preset positions, and the distance between the limiting blocks is the thread pitch multiple of the thread sections. When a plurality of limiting blocks exist, the shapes of the limiting blocks can be consistent or inconsistent.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An adjustable bend sheath, comprising:

the sheath comprises a sheath body and a pull wire;

a handle which comprises a base for fixing the sheath tube body, a slide rail sleeved at one end of the base close to the sheath tube body, a slide block matched with the slide rail, a thread section arranged between the base and the slide block, and a knob jointed with the slide block,

wherein the pull wire is arranged at one end of the sheath tube body close to the base, the pull wire passes through the knob and is fixedly connected with the sliding block,

at least one limiting block matched with the thread of the thread section is arranged at a preset position of the slide rail,

the thread section is screwed with the thread of the sliding block, and the screw section is in rigid connection with the knob in a matching manner.

2. The adjustable curved sheath according to claim 1, wherein the slider is provided with a through hole, the pull wire is inserted into the through hole, the knob is provided with a pull wire channel matched with the pull wire, and the pull wire channel is communicated with the through hole when rotated to an angle;

the stay wire is also arranged in the stay wire channel in a penetrating way.

3. The adjustable bend sheath of claim 1, wherein the pull wire and the sheath body are integrally formed.

4. The adjustable bend sheath of claim 1, wherein the length of the pull wire is less than the spacing between the fixed end of the pull wire and the base.

5. The adjustable sheath of claim 1, wherein the inner wall of the threaded section is internally threaded and the slider is externally threaded.

6. The adjustable sheath of claim 1, wherein the stop is an annular ridge disposed around an outer perimeter of the track.

7. The adjustable sheath of claim 1, wherein the slide rail is provided with a plurality of parallel stoppers at predetermined positions, and the distance between the stoppers is a multiple of the thread pitch of the thread section.