JP3305799B2 - Angle operation wire attachment structure for endoscope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting an angle operating wire in an endoscope (including a catheter).

[0002]

2. Description of the Related Art An endoscope is easy to be inserted into a bent body cavity, and it is required that the tip of the endoscope be arbitrarily changed with respect to an observation point during observation. I can do it. For this purpose, the tip of the angle operation wire is attached to the tip of the flexible tube, and the angle operation wire is operated by the rear handle.

[0003] Therefore, the structure for attaching the tip of the angle operation wire to the head is rigid so that the attachment portion is not easily detached, and the fixing portion is large, so that the diameter of the head is not increased. Various ingenuity has been devised, and there are techniques such as Japanese Utility Model Publication No. 3-52483, Japanese Patent Publication No. 3-10327, and Japanese Patent Publication No. 3-72291.

In the above-mentioned technique, as shown in FIG. 13, a stopper 7 is attached to the tip of an angle operating wire 6, and the stopper 9 is fixed to a concave portion 9 formed on the outer peripheral surface of a tip body 8, so that the most advanced node ring is provided. Is fitted to the rear end of the distal end body. Next, as shown in FIG. 14, in the technique of FIG. 14, a stopper 11 protruding to the side of the angle operating wire 10 is formed at the distal end, and the angle operating wire 10 is formed in a groove 13 formed on the outer peripheral surface of the distal end main body 12. 10, the stopper 11 is projected from the outer peripheral surface of the distal end main body 12, and the most advanced node ring is fitted to the rear end of the distal end main body, and the stopper 11 is attached to the front end of the node ring. The structure is in contact.

[0005] Next, as shown in FIG.
Notch grooves 15a, 15b are formed in the tube wall of the tubular member 14 constituting the head, and the notch grooves 15a, 15b are formed.
b into the notch grooves 15a, 15b by fitting at least one end of the angle operation wires 16a, 16b and a wire guide for guiding the angle operation wires 16a, 16b.
Is filled with a fixing agent 17 and fixed.

[0006]

However, according to each of the above prior arts, the prior art and the prior art require a stopper at the tip of the angle operation wire, and the mounting structure strongly pulls the angle operation wire during the angle operation. In addition, there is a problem that the stopper must be attached firmly so that the stopper does not come out, and furthermore, a fine and elaborate work is required that a concave portion must be formed on the outer peripheral surface of the small tip portion main body. There is.

[0007] Furthermore, since the stopper portion is provided, the fixing portion becomes large and the distal end main body becomes thick, resulting in a problem that the endoscope becomes large in diameter. In addition, the technique also has a problem that a fine and elaborate work is also required that a notch groove must be formed in the tubular member, and the tip of an angle operating wire or a wire guide fitted in the notch groove is also required. There is a problem with the rigidity of the installation because it has to be fixed with a fixing agent, and in order to increase the fixing area, an unnecessarily thick wire will be used, and a wire as thick as necessary will be used Cannot be performed, which results in a problem that the diameter of the endoscope becomes large.In addition, if the fixing point is small and weak, the angle operation wire may come off, and repair work of the endoscope may be performed. This is a difficult task because it involves dismantling.

[0008]

Accordingly, the present invention provides an endoscope.
Attach the angle control wire to the tip of the
By manipulating the rear end of the operation wire, the tip of the endoscope can be
Endoscope angle operation wire for bending operation
In the mounting structure, the angle operation wire is spirally wound a plurality of times to form a cylindrical body, and this cylindrical body is fitted to the rear portion of the rigid end portion of the endoscope and has a predetermined area on the outer peripheral surface. > It is characterized by being fixed.

[0009]

According to the above construction, the angle operating wire can be attached only by fitting and fixing the tubular body to the rear end of the rigid end portion of the endoscope, thereby making the endoscope durable and thin. I can finish it.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view showing an example of a state in which an angle operating wire is spirally wound a plurality of times, FIG. 2 is an explanatory view showing a state in which the angle operating wire is formed into a cylindrical body, and FIG. FIG. 4 is an explanatory diagram of a state where a wire is attached, and FIG. 4 is an explanatory diagram of a state where an angle operation wire is attached to a distal end rigid portion of the endoscope.

In FIG. 1, reference numeral 1 denotes an angle operating wire, which is wound around a central portion a plurality of times in a direction opposite to each other to form a spiral portion 1a, as shown in FIG. The cylindrical body 2 is formed by being fixed as shown in FIG. In addition, the method of forming the screw portion 1a by the angle operation wire may be any winding method, for example, as shown in FIGS.
As shown in the figure, it may be made into two pieces and wound together in the same direction,
Further, as shown in FIG. 10, a plurality of coils may be wound together or as shown in FIG.

The material of the angle operation wire 1 is metal such as stainless steel, artificial fiber, natural fiber, or the like, and the screw portion 1a may or may not be adjacent to each other. The method of maintaining the shape of the cylindrical body 2 varies depending on the material thereof, and the cylindrical body 2 having a predetermined diameter is finished by molding, adhesive, soldering, brazing, welding by laser or the like. Alternatively, the columnar body may be formed by molding or the like, and the center thereof may be cut out to form the cylindrical body 2.

The cylindrical body 2 does not necessarily need to be a cylindrical body having the same diameter up to both ends as shown in the figure, but may have a shape such as a truncated cone or a spindle having different diameters at both ends. Good. As shown in FIG. 4, such a tubular body 2 is fitted on the outer periphery of the rear end of the distal end hard portion 3 of the endoscope, and both are integrally formed by molding, adhesive, soldering or the like.

At the rear of the rigid end portion 3 fitted with the cylindrical body 2,
Further, as shown in FIGS. 5 and 6, the foremost node ring 4 of the connected node rings constituting the curved portion is fitted to make the flexible tube portion continuously continuous. Both ends of the angle operation wire 1 having the cylindrical body 2 fixed to the distal end rigid portion 3 in this manner extend to the handle of the endoscope and are connected to a normal operation device (not shown).

Then, as shown in FIG. 6, the outer peripheral surface of the rigid portion 3 and / or the curved portion excluding the rigid portion 3 and the outer peripheral surface of the flexible tube portion are integrally formed by covering the outer surface 5.
Although the above description has been made using an endoscope, the same is true for a catheter. As shown in FIG. 7, the tubular body is fitted to the distal end of a catheter body and integrally formed by molding or the like.

Both ends of the angle operation wire from the cylindrical body fixed to the catheter body extend to the rear of the catheter and are connected to a normal operation device. As described above, in any case of the endoscope and the catheter, the inner peripheral surface of the cylindrical body 2 is formed by merely fitting and fixing the cylindrical body 2 having a predetermined diameter formed by winding the angle operating wire 1 to the end. The surface is fixed to the outer peripheral surface of the distal end hard portion 3 with a predetermined area.

Although each of the above embodiments has been described in connection with a two-directional angle, as shown in FIG. 12, a four-directional angle can be constructed in exactly the same manner by combining angle wires.

[0018]

According to the present invention described in detail above, a part of the angle operation wire is spirally wound a plurality of times to form a cylindrical body, and this cylindrical body is formed into a rigid portion at the distal end of the endoscope. Since the angle operation wire can be attached simply by being fitted and fixed to the rear part, especially in an endoscope that requires a small thickness, the angle operation wire can be attached to a small diameter without thickening. There is an effect that can be.

Further, since the fixing portion is in surface contact, the fixing state is assured, and there is an effect that the fixing wire does not come off even if a strong tensile force is applied to the angle operation wire.
As a result, a thinner angle operation wire can be used, and the diameter of the endoscope can be reduced. Further, since the tubular body is merely fitted and fixed to the distal end rigid portion of the endoscope, there is an effect that other components are not required and the attaching operation can be easily performed.

Further, since there is no need for soldering when attaching the angle operation wire, it is possible to use a stainless steel wire which cannot be used conventionally and has an effect of improving the durability.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an example of a state in which an angle operation wire is spirally wound a plurality of times.

FIG. 2 is an explanatory view of a state formed in a cylindrical body.

FIG. 3 is an explanatory diagram of an endoscope in a state where an angle operation wire is attached to a rigid distal end portion.

FIG. 4 is an explanatory view showing a state in which an angle operation wire is attached to a rigid distal end portion.

FIG. 5 is an explanatory diagram of a state where a curved portion is attached to a rigid distal end portion.

FIG. 6 is a cross-sectional view showing a state in which a curved portion is attached to the distal end rigid portion.

FIG. 7 is an explanatory view of a catheter in a state where an angle operation wire is attached to a distal rigid portion.

FIG. 8 is an explanatory diagram showing an example of how to wind an angle operation wire.

FIG. 9 is an explanatory diagram showing an example of how to wind an angle operation wire.

FIG. 10 is an explanatory diagram showing an example of how to wind an angle operation wire.

FIG. 11 is an explanatory diagram showing an example of how to wind an angle operation wire.

FIG. 12 is an explanatory diagram showing an example of how to wind an angle operation wire.

FIG. 13 is an explanatory diagram showing a conventional example.

FIG. 14 is an explanatory diagram showing another conventional example.

FIG. 15 is an explanatory diagram showing another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Angle operation wire 2 Cylindrical body 3 Tip rigid part

Claims (1)

(57) [Claims] An angle operation of an endoscope in which an angle operation wire is attached to a tip portion of the endoscope and a rear end of the angle operation wire is operated to perform a bending operation of the end portion of the endoscope. In the wire mounting structure, the angle operation wire is spirally wound a plurality of times to form a cylindrical body, and the cylindrical body is fitted to the rear end of the rigid end portion of the endoscope.
A structure for mounting an angle operation wire of an endoscope, wherein the surface is fixed to an outer peripheral surface with a predetermined area .