阅读说明：本技术 一种内窥镜柔性导管的定向弹性偏转结构 (Directional elastic deflection structure of flexible catheter of endoscope ) 是由 杨嗣星 王少刚 杨勇强 龙刚 胡学成 李金平 毛业云 乐东东 秦操 于 2019-11-19 设计创作，主要内容包括：本发明公开了一种内窥镜柔性导管的定向弹性偏转结构,包括内窥镜软鞘和同轴设置于内窥镜软鞘内、前端固定于内窥镜软鞘前端的转向钢丝,内窥镜软鞘内沿其轴向方向开设有通道孔,转向钢丝上或通道孔内或内窥镜软鞘上同轴设置有至少可以向一侧偏转并复位的弹性偏转件。通过单向或双向偏转的弹性偏转件来辅助内窥镜软鞘进行偏转,提高了内窥镜软鞘各位置在偏转方向的一致性,提高了塑料柔性导管偏转方向控制的准确性。(The invention discloses a directional elastic deflection structure of an endoscope flexible catheter, which comprises an endoscope soft sheath and a steering steel wire which is coaxially arranged in the endoscope soft sheath, wherein the front end of the steering steel wire is fixed at the front end of the endoscope soft sheath, a channel hole is formed in the endoscope soft sheath along the axial direction of the endoscope soft sheath, and an elastic deflection piece which can deflect and reset at least to one side is coaxially arranged on the steering steel wire or in the channel hole or on the endoscope soft sheath. The flexible endoscope sheath is assisted to deflect by the elastic deflection piece which deflects in one direction or two directions, so that the consistency of all positions of the flexible endoscope sheath in the deflection direction is improved, and the accuracy of controlling the deflection direction of the plastic flexible catheter is improved.)

1. The directional elastic deflection structure of the flexible catheter of the endoscope comprises a flexible sheath (1) of the endoscope and a steering steel wire (2) which is coaxially arranged in the flexible sheath (1) of the endoscope, wherein the front end of the steering steel wire is fixed at the front end of the flexible sheath (1) of the endoscope, a channel hole (3) is formed in the flexible sheath (1) of the endoscope along the axial direction of the flexible sheath, and the directional elastic deflection structure is characterized in that: an elastic deflection piece which can deflect and reset at least to one side is coaxially arranged on the steering steel wire (2) or in the channel hole (3) or on the endoscope soft sheath (1).

2. A directionally resilient deflecting structure for an endoscopic flexible catheter as defined in claim 1, wherein: the elastic deflection piece comprises a one-way elastic guide pipe (4), and a plurality of first V-shaped grooves (4.1) which are transversely arranged are formed in the surface of one side of the one-way elastic guide pipe (4) at uniform intervals along the axial direction of the one-way elastic guide pipe (4).

3. A directionally resilient deflecting structure for an endoscopic flexible catheter as defined in claim 1, wherein: the elastic deflection piece comprises an elastic and elongated spring plate (5) and a spring (6), and one side surface of the spring (6) is coaxially fixed on the surface of the spring plate (5).

4. A directionally resilient deflecting structure for an endoscopic flexible catheter as defined in claim 1, wherein: the elastic deflection piece comprises a spring plate (5) and a two-way elastic conduit (7), wherein the spring plate has elasticity and a long strip shape, the two side surfaces corresponding to the two-way elastic conduit (7) are all along the second V-shaped grooves (7.1) which are uniformly spaced and provided with a plurality of transverse arrangements in the axial direction of the two-way elastic conduit (7), the second V-shaped grooves (7.1) on the surfaces of the two opposite sides of the two-way elastic conduit (7) are along the axial direction of the two-way elastic conduit (7) in a staggered manner, one side surface of the spring plate (5) is coaxially fixed on the two-way elastic conduit (7), and the two-way elastic conduit (7) is provided with one side surface of the second V-shaped grooves (.

5. A directionally resilient deflecting structure for an endoscopic flexible catheter as defined in claim 1, wherein: the elastic deflection piece comprises a bidirectional elastic conduit (7), wherein the corresponding two side surfaces of the bidirectional elastic conduit (7) are respectively provided with a plurality of transversely-arranged second V-shaped grooves (7.1) at equal intervals in the axial direction of the bidirectional elastic conduit (7), and the second V-shaped grooves (7.1) on the two opposite side surfaces of the bidirectional elastic conduit (7) are arranged in a staggered manner in the axial direction of the bidirectional elastic conduit (7).

6. A directionally resilient deflecting structure for an endoscopic flexible catheter as defined in claim 2, wherein: the unidirectional elastic conduit (4) is a straight pipe made of elastic material which has elasticity and can recover after being bent and deformed.

7. A directionally resilient deflecting structure for an endoscopic flexible catheter as described in claim 4 or 5, wherein: the bidirectional elastic conduit (7) is a straight pipe made of elastic material which has elasticity and can recover after being bent and deformed.

Technical Field

The invention relates to the technical field of endoscopes, in particular to a directional elastic deflection structure of a flexible catheter of an endoscope.

Background

With the development of minimally invasive treatment technology, endoscope technology has become an indispensable diagnosis and treatment means in some hospital departments due to the fact that accurate and intuitive diagnosis and a minimally invasive treatment method without opening a knife are more and more favored by doctors and patients. When a fiberscope or an electronic scope in an endoscope is used for observing in a human body, in order to realize the inspection in a larger range, the head of the catheter is generally allowed to deflect in a range allowed by a human organ, and the micro fiber or the lens of the electronic scope at the head of the catheter is driven to deflect, so that the shooting range of images in the body is enlarged. The guide tube of the endoscope is generally formed by plastic extrusion, the arrangement of the cavities in the guide tube is not uniform and standard due to the design requirement, when the guide tube is driven to deflect by adopting a long flexible steel wire or other flexible parts, the guide tube can generate deflection in other directions in the preset deflection direction, so that errors in the deflection direction, which is referred to as deflection in the industry, can be caused, and the endoscope guide tube cannot enter a corresponding organ to be observed when the endoscope guide tube deflects due to overlarge deflection or touches the organ inside a human body when the endoscope guide tube deflects, so that adverse effects are caused on the operation process. At present, the control of the deflection of the catheter is generally to set a limit value in production, and if the deflection is out of tolerance in product inspection, rework processing is carried out as required until an endoscope product which can meet the requirement of the deflection limit value is processed. However, due to the material properties of the flexible guide tube, deviations of different degrees almost inevitably occur, which results in a decrease in the yield of the endoscope guide tube, a large number of rework situations, and even an uncorrectable situation.

Disclosure of Invention

The present invention is to solve the above-mentioned drawbacks of the prior art, and an object of the present invention is to provide a directional elastic deflection structure capable of effectively correcting the deflection direction of an endoscope catheter and preventing the endoscope catheter from deviating.

In order to achieve the purpose, the directional elastic deflection structure of the flexible catheter of the endoscope comprises a flexible sheath of the endoscope and a steering steel wire which is coaxially arranged in the flexible sheath of the endoscope, the front end of the steering steel wire is fixed at the front end of the flexible sheath of the endoscope, a channel hole is arranged in the flexible sheath of the endoscope along the axial direction of the flexible sheath, and the directional elastic deflection structure is characterized in that: an elastic deflection piece which can deflect and reset at least to one side is coaxially arranged on the steering steel wire or in the channel hole or on the endoscope soft sheath.

The elastic deflection piece can be a unidirectional deflection piece or a bidirectional deflection piece, and when the elastic deflection piece is a unidirectional deflection piece, the elastic deflection piece has the following three structures:

the structure I is as follows:

the elastic deflection piece comprises a one-way elastic guide pipe, and a plurality of first V-shaped grooves which are transversely arranged are uniformly arranged on one side surface of the one-way elastic guide pipe at intervals along the axial direction of the one-way elastic guide pipe.

The structure II is as follows:

the elastic deflection piece comprises an elastic and elongated spring plate and a spring, and one side surface of the spring is coaxially fixed on the surface of the spring plate.

The structure is three:

the elastic deflection piece comprises a spring plate and a two-way elastic conduit, wherein the spring plate is elastic and long-strip-shaped, the two side surfaces of the two-way elastic conduit, which correspond to each other, are respectively arranged along the second V-shaped grooves, a plurality of transverse arrangements are arranged in the axial direction of the two-way elastic conduit at intervals, the second V-shaped grooves on the surfaces of the two opposite sides of the two-way elastic conduit are arranged in a staggered manner, and one side surface of the spring plate is coaxially fixed on the two-way elastic conduit and is provided with one side surface of each second V-shaped groove.

When the resilient deflection member is a bi-directional deflection member:

the elastic deflection piece comprises a bidirectional elastic conduit, a plurality of transversely-arranged second V-shaped grooves are uniformly formed in the two corresponding side surfaces of the bidirectional elastic conduit along the axial direction of the bidirectional elastic conduit at intervals, and the second V-shaped grooves in the two opposite side surfaces of the bidirectional elastic conduit are arranged in a staggered mode along the axial direction of the bidirectional elastic conduit.

Furthermore, the one-way elastic conduit is a straight pipe made of elastic material which has elasticity and can be restored after being bent and deformed.

Furthermore, the bidirectional elastic conduit is a straight pipe made of elastic material which has elasticity and can be restored after being subjected to bending deformation.

The invention has the beneficial effects that:

1. the flexible endoscope sheath is assisted to deflect by the elastic deflection piece which deflects in one direction or two directions, so that the consistency of all positions of the flexible endoscope sheath in the deflection direction is improved, and the accuracy of controlling the deflection direction of the plastic flexible catheter is improved;

2. by utilizing the structure and material characteristics of the elastic deflection piece, the soft sheath of the endoscope can accurately reset after the deflection traction force is cancelled, so that the self-resetting capability of the flexible catheter is improved;

3. the phenomena of offset reworking and scrapping of the endoscope soft sheath are reduced, the yield of products is improved, and the production cost is saved.

4. The endoscope soft sheath added with the elastic deflection piece has a simple structure, is easy to process and is convenient to popularize.

Drawings

FIG. 1 is a perspective view of the steering wire of the present invention with a resilient deflector disposed thereon;

FIG. 2 is a front view of the steering wire of the present invention with the resilient deflector disposed thereon;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 4 is a perspective view of the arrangement of the resilient deflection member within the passage hole of the present invention;

FIG. 5 is a front view of the present invention with a resilient deflector disposed within the passage aperture;

FIG. 6 is a cross-sectional view taken along line B-B of FIG. 4;

FIG. 7 is a perspective view of a flexible bidirectional catheter disposed over a flexible sheath of an endoscope in accordance with the present invention;

FIG. 8 is a side view of the flexible sheath of the endoscope of the present invention with a bidirectional flexible catheter disposed thereon;

FIG. 9 is a perspective view of a unidirectional resilient catheter of the present invention;

FIG. 10 is a side view of a unidirectional resilient catheter of the present invention;

FIG. 11 is a perspective view of a single direction deflection resilient deflection member formed by a spring plate and a spring in accordance with the present invention;

FIG. 12 is a side view of a spring plate and spring combination of the present invention showing a single direction of deflection of the resilient biasing member;

FIG. 13 is a perspective view of a bidirectional flexible catheter of the present invention;

FIG. 14 is a front view of the bidirectional flexible catheter of the present invention;

FIG. 15 is a front view of the unidirectional resilient structure of the spring plate and the bidirectional resilient conduit of the present invention;

the endoscope comprises an endoscope soft sheath 1, a steering steel wire 2, a channel hole 3, a one-way elastic catheter 4.1-a first V-shaped groove, a spring plate 5, a spring 6, a two-way elastic catheter 7.1-a second V-shaped groove and an end cap 8.

Detailed Description

The invention is described in further detail below with reference to the figures and the specific embodiments.

The directional elastic deflection structure of the flexible endoscope catheter shown in fig. 1 to 15 comprises a flexible endoscope sheath 1 and a steering steel wire 2 coaxially arranged in the flexible endoscope sheath 1, wherein the front end of the steering steel wire 2 is fixed on an end cap 8 at the front end of the flexible endoscope sheath 1, a channel hole 3 is formed in the flexible endoscope sheath 1 along the axial direction of the flexible endoscope sheath, and an elastic deflection piece capable of deflecting in one direction or two directions and resetting is coaxially arranged on the steering steel wire 2 or in the channel hole 3 or on the flexible endoscope sheath 1.

As shown in fig. 1-3, the steering steel wire 2 is coaxially sleeved with a unidirectional deflectable elastic deflection member to realize unidirectional precise deflection of the endoscope soft sheath 1, the unidirectional deflectable elastic deflection member is a unidirectional elastic conduit 4, and as shown in fig. 9-10, a first V-shaped groove 4.1 is arranged on one side surface of the unidirectional elastic conduit 4 at intervals along the axial direction thereof.

The one-way deflectable elastic deflecting member may be a combination of a spring and a spring plate as shown in fig. 11 to 12, which includes a spring plate 5 having elasticity and a long bar shape and disposed along the axial direction of the steering wire 2, and a spring 6 fitted over the steering wire 2, and one side surface of the spring 6 is fixed to the inner side surface of the spring plate 5.

The steering steel wire 2 can be coaxially sleeved with a bidirectional deflection elastic deflection part to realize bidirectional accurate deflection of the endoscope soft sheath 1, the bidirectional deflection elastic deflection part is a spring or a bidirectional elastic catheter 7 shown in figures 13-14, the two side surfaces of the bidirectional elastic catheter 7 are respectively provided with a second V-shaped groove 7.1 at intervals along the axial direction, and the second V-shaped grooves 7.1 on the two side surfaces of the bidirectional elastic catheter 7 are arranged in a staggered mode.

On the basis, as shown in fig. 15, the steering wire 2 is coaxially sleeved with an elastic deflecting member capable of deflecting in one direction to realize the unidirectional accurate deflection of the endoscope soft sheath 1, and the elastic deflecting member capable of deflecting in one direction comprises a bidirectional elastic conduit 7 and a spring plate 5 coaxially fixed with the bidirectional elastic conduit 7.

In order to realize the accurate deflection of the endoscope soft sheath 1, an elastic deflection piece can be arranged in the channel hole 3, and the structure is as follows:

as shown in fig. 4-6, a unidirectional deflectable elastic deflecting member is coaxially arranged in the passage hole 3 to realize unidirectional precise deflection of the endoscope soft sheath 1, and the unidirectional deflectable elastic deflecting member is a unidirectional elastic conduit 4 (as shown in fig. 9-10), or a combined structure of a spring plate 5 and a spring 6 as shown in fig. 11-12, or a combined structure of the spring plate 5 and a bidirectional elastic conduit 7 as shown in fig. 15.

The passage hole 3 can be coaxially provided with a bidirectional deflection elastic deflection member to realize bidirectional accurate deflection of the endoscope soft sheath 1, wherein the bidirectional deflection elastic deflection member is a spring 6 or a bidirectional elastic catheter 7 as shown in fig. 13-14.

In order to realize the accurate deflection of the endoscope soft sheath 1, the endoscope soft sheath 1 can be sleeved with an elastic deflection piece, and the structure is as follows:

as shown in fig. 8, the flexible sheath 1 of the endoscope is coaxially sleeved with a unidirectional deflectable elastic deflecting member to realize unidirectional precise deflection of the flexible sheath 1 of the endoscope, and the unidirectional deflectable elastic deflecting member is a unidirectional elastic conduit 4 (as shown in fig. 9-10), or a combined structure of a spring plate 5 and a spring 6 as shown in fig. 11-12, or a combined structure of the spring plate 5 and a bidirectional elastic conduit 7 as shown in fig. 15.

As shown in fig. 7, the flexible sheath 1 of the endoscope may be coaxially sleeved with a bidirectional deflectable elastic deflecting member to achieve bidirectional precise deflection of the flexible sheath 1 of the endoscope, the bidirectional deflectable elastic deflecting member is a spring 6 or a bidirectional elastic conduit 7 as shown in fig. 13-14.

In order to make the opening part of the elastic deflection piece arranged on the outer wall of the endoscope soft sheath 1 smooth, a polyurethane heat-shrinkable tube can be sleeved outside the elastic deflection piece, the heat-shrinkable tube can more tightly coat the elastic deflection piece after being heated, and an elastic protective coating can also be coated on the surface of the elastic deflection piece so as to achieve the purpose of protection.

Besides the elastic deflection pieces coaxially arranged in the steering steel wire 2 and the channel hole 3 and on the endoscope soft sheath 1, the flexible elastic sheet which is pasted or inlaid with metal or plastic can be directly adopted on the outer wall of the channel hole 3 or the endoscope soft sheath 1 to reduce the deflection phenomenon.

On the premise of not changing the original endoscope catheter structure, the invention adds an elastic deflection piece for controlling the orientation of the deflection direction of the catheter on the basis of the original catheter structure, the elastic deflection piece can be made of elastic plastics or metal (such as rubber, copper, plastic and the like), the elastic deflection piece is easy to bend or deform towards one side of the opening and is difficult to deform at the side without the opening, and the elastic deflection piece has elasticity which can reset the device so as to drive the catheter to reset.

The resilient deflection member may be designed for unidirectional deflection control as well as for bidirectional deflection control. The elastic deflector can be mounted on the outer wall of the endoscope flexible sheath 1, or can be mounted in the steering wire 2 or the passage hole 3 according to requirements. The opening direction (plane where the maximum opening dimension is) of the elastic deflection member coincides with the deflection direction, and if the elastic deflection member is bidirectional, the opening directions on both sides coincide with the deflection directions in both directions, and the bidirectional deflection of the catheter is generally 180 °.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the structure of the present invention in any way. Any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the scope of the technical solution of the present invention.