JP2018057769A - Bending push/pull function structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bending push/pull function structure which can perform push-drive and pull-drive in a tip motion even in a curved or bent state, and can obtain the same drive forces in the push drive and also in the pull drive.SOLUTION: A bending push/pull function structure comprises: a bendable coil-shaped member 1; a flexible rope 2 which is inserted into an inside diameter of the bendable coil-shaped member; the flexible rope 2 which is inserted into the inside diameter of the bendable coil-shaped member 1 at both ends of the bendable coil-shaped member 1; a one-end drive connecting member 3; and the other end drive connecting member 4. The flexible rope 2, the one-end drive connecting member 3 and the other end drive connecting member 4 are fastened to one another, and a push-side drive force can be obtained by pushing the bendable coil-shaped member via the one-end drive connecting member 3 and the other end drive connecting member 4.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a bendable push-pull functional structure that can be bent, and more specifically, includes a bendable coil-shaped member and a flexible rope on the inner diameter of the coil-shaped member, and is particularly suitable for use in medical devices and the like. The present invention relates to a possible bending push-pull functional structure.

  The bending push-pull function structure is used for driving a distal end working unit in a curved or bent state of a medical device such as an endoscope, various forceps, or a catheter, particularly when performing endoscopic surgery. The lesion is bent or bent to the lesion of the organ in the body cavity.

  The bending push-pull functional structure used for such a medical device is desirably a compact, lightweight and simple structure, and the tip movement of the medical device can be pushed or pulled even in a curved or bent state. It is desirable and important that the pushing drive and the pulling drive have the same driving force.

  In the conventional medical device, the driving means for opening and closing the pair of gripping pieces performs the opening and closing operation of the gripping piece by a link mechanism. However, the structure is complicated and the gripping piece is not bent. There seems to be difficulty in opening and closing. (For example, see Patent Document 1)

  As another medical device, it has a surgical treatment portion having a gripping surface that can be opened and closed at the tip portion, and is connected through a joint portion that can be tilted around a tilting support shaft. Although there is a spring member that urges the gripper opening direction or closing direction of the distal end working unit and the spring member is used to drive the gripper opening direction or closing direction, the driving force is limited. (For example, see Patent Document 2)

JP 2005-169011 A Japanese Patent Laying-Open No. 2015-80556

  However, the conventional driving means for opening and closing the gripping piece described in Patent Document 1 performs the opening and closing operation of the gripping piece by a link mechanism. However, the structure is complicated and the gripping piece is not bent. The driving of the opening / closing operation has a large number of parts and a complicated structure. In addition, the manufacturing process is expensive and costly, and the operator's force is absorbed by the link portion, which makes it impossible to obtain an accurate relative opening / closing operation of the gripping piece.

  Further, the gripper described in Patent Document 2, that is, the driving of the opening and closing operation of the gripping piece is provided with a spring member that biases in the opening direction or the closing direction, and the spring member is used for driving the opening or closing direction of the gripping piece. There are some things, but the driving force is limited.

  The present invention has been made in view of the above-mentioned problems of the prior art, and the object of the present invention is to have a compact, lightweight and simple structure, particularly for a bending push-pull function structure used for a medical device, Furthermore, the distal end operation of the medical device is to provide a bending / pull / pull function structure which can be pushed and pulled even in a curved or bent state and can obtain the same driving force for both pushing and pulling.

An instrument having an outer diameter and a length that can be set, a proximal end, that is, a rear end, a distal end, that is, a distal end working portion, and a bending portion of the distal end working portion. In the structure that transmits the motion and the drive,
A bendable coil-shaped member, a flexible rope penetrating the inner diameter of the bendable coil-shaped member, and an inner diameter of the bendable coil-shaped member bendable at both ends of the bendable coil-shaped member. A flexible rope is consolidated and an engagement member with an external member is formed.

  The flexible rope penetrating the inner diameter of the bendable coil-shaped member is loose penetration or loose penetration.

  The bendable coiled member is formed with non-initial tension and tight winding.

It is a perspective view of a bending push-pull functional structure according to an embodiment of the invention. It is sectional drawing of the bending push / pull functional structure in connection with one Embodiment of invention. It is sectional drawing of the usage example to the bending forceps of the bending push-pull functional structure in connection with one Embodiment of invention.

Hereinafter, an embodiment of the bending push-pull functional structure of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is an external view showing components of the bending push / pull functional structure of the present invention, and FIG. 2 is a cross-sectional view showing components of the bending push / pull functional structure of the present invention. Moreover, FIG. 3 is sectional drawing of the usage example to the bending forceps of the bending push / pull functional structure of this invention.
An instrument having an outer diameter and a length that can be set, a proximal end, that is, a rear end, a distal end, that is, a distal end working portion, and a bending portion of the distal end working portion. In the structure that transmits the motion and the drive,
The bendable coiled member 1, the flexible rope 2 penetrating the inner diameter of the bendable coiled member, and the inner diameter of the bendable coiled member 1 at both ends of the bendable coiled member 1. The penetrating flexible rope 2, one end drive connection member 3, and the other end drive connection member 4 are arranged, and the flexible rope 2, one end drive connection member 3, the other end drive connection member 4, And a bendable coil-like member is pressed through the one end drive connecting member 3 and the other end drive connecting member 4 to obtain a driving force on the push side.
Further, by pulling the flexible rope 2 penetrating the inner diameter of the bendable coil-shaped member 1 through the one end drive connecting member 3 and the other end drive connecting member 4, a driving force on the pulling side is obtained. It is done.

  Further, since the flexible rope 2 penetrating the inner diameter of the bendable coil-shaped member 1 is loosely penetrating or loosely penetrating, the coil-shaped member 1 and the flexible rope 2 bendable even in a bent state. The contact friction is reduced.

  Further, since the bendable coiled member 1 is formed with non-initial tension, the bending load is reduced. Further, since the bendable coil-shaped member 1 is formed by tight winding, it is possible to prevent the delay of the pressing drive.

  The bending push-pull functional structure according to the present invention is mainly used for transmitting the opening / closing drive of the tip gripping piece of the bending forceps, but can also be used for other forceps, catheters, and the like.

1. 1. A bendable coiled member 2. Flexible rope One end drive connection member 4. Other end drive connection member

Claims (3)

An instrument having an outer diameter and a length that can be set, a proximal end, that is, a rear end, a distal end, that is, a distal end working portion, and a bending portion of the distal end working portion. In the structure that transmits the motion and the drive,
A bendable coil-shaped member, a flexible rope penetrating the inner diameter of the bendable coil-shaped member, and a drive connection member disposed at both ends of the bendable coil-shaped member, and bent to the drive connection member A bending push-pull functional structure characterized in that a flexible rope penetrated through an inner diameter of a possible coil-shaped member is formed.   2. The bending push / pull functional structure according to claim 1, wherein the flexible rope penetrated through the inner diameter of the bendable coil-shaped member is loosely penetrated or loosely penetrated and is solidified to the drive connecting member. .   2. The bending push / pull functional structure according to claim 1, wherein the bendable coil-shaped member is formed with non-initial tension and tight winding.

Images