JPS63281618A - Curved tube for endoscope - Google Patents

Abstract

PURPOSE:To facilitate assembling and to reduce the number of parts, by providing a large number of nodal parts, each of which is constituted by mutually closely bonding and fixing the respective runs of the wire like body of a coil excepting connection parts in the axial direction thereof, at an almost equal interval and mounting wire guides for guiding a curving operating wire to the insides of the nodal parts to constitute a curved tube. CONSTITUTION:The connection parts 3a, 3b connected to the leading end part and flexible tube part of an endoscope are provided to both ends of a coil 1 formed by spirally winding a wire like body 2 made of a metal having elasticity and one end of a curving operating wire 4 is fixed to the inside of the connection part 3a connected to the leading end part of the endoscope by soldering. A large number of nodal parts 5... are provided to the coil 1 excepting the connection parts 3, 3 in the axial direction thereof at an equal interval. Each of the nodal parts 5 is formed by mutually closely bonding and fixing the respective runs of the wire like body 2 by solder or an adhesive and the wire guides 6 for guiding the curving operating wire 4 are mounted to the inside of the nodal parts 5 at an almost 90 deg.-interval in the peripheral direction. By this constitution, the coil 1 can be used as the curved tube of the endoscope by the drawing operation of the operating wire 4.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a curved tube used in an endoscope.

[Conventional technology]

Generally, an endoscope consists of an insertion section and an operation section, and the insertion section is constructed by sequentially connecting a flexible tube, a curved tube, and a distal end section from the operation section side. The operating section is provided with a bending operation knob, and the bending tube is bent by pulling the bending operation wire with this operation knob.

[Problem that the invention seeks to solve]

However, conventional curved tubes for endoscopes are constructed by rotatably connecting multiple joint rings formed in the shape of a short tube with a pin, so there are problems in that it takes time and effort to assemble and has a large number of parts. was there.

The present invention has been made in view of these problems, and its purpose is to provide a curved tube for an endoscope that is easy to assemble and can reduce the number of parts.

[Means for solving problems]

In order to achieve such an object, the present invention provides a coil by spirally winding an elastic linear body, and a connecting portion connected to both ends of the coil with a flexible tube and a distal end portion of an endoscope. and a plurality of joints formed by closely fixing the linear bodies to each other in the axial direction of the coil except for the connecting parts, and a wire that guides the bending operation wire inside the joints. It is special in that it comes with a guide attached.

[For production]

According to the above configuration, the curved pipe can be easily assembled without connecting a plurality of node rings as in the conventional case, and the number of parts can be reduced.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show one embodiment of the present invention, and 1 is a coil formed by spirally winding an elastic linear body 2 made of metal or the like. Connecting parts 3a and 3b connected to the distal end of the endoscope and the flexible tube are provided at both ends of the coil 1, and a bending operation wire is provided inside the connecting part 3a connected to the distal end of the endoscope. One end of 4 is fixed by brazing or the like. Note that the connecting portions 3a and 3b are formed by closely fixing the linear bodies 2 to each other by half-width or adhesive. Further, a plurality of node portions 5 . . . are provided at approximately equal intervals in the axial direction of the coil 1, excluding the connecting portions 3, 3. The joints 5 are formed by closely fixing the linear bodies 2 to each other with solder or adhesive, and inside each joint 5, a wire guide 6 for guiding the bending operation wire 4 is provided at approximately 90 degrees in the circumferential direction. installed at intervals of

According to the above structure, the coil 1 can be bent vertically and horizontally as shown in FIG. 3 by pulling the operating wire 4, so it can be used as a curved tube of an endoscope. Now, the curved pipe can be easily assembled without connecting a plurality of joint rings as in the conventional method, and the number of parts can be reduced.

〔Effect of the invention〕

As explained above, according to the present invention, an elastic linear body is spirally wound to form a coil, and connecting portions at both ends of the coil are connected to the flexible tube and the distal end portion of the endoscope. and a plurality of joints formed by closely fixing the linear bodies to each other in the axial direction of the coil except for the connecting parts, and a wire that guides the bending operation wire inside the joints. Since the guide is attached to form the curved tube, it is possible to provide a curved tube for an endoscope that is easy to assemble and can reduce the number of parts.

[Brief explanation of the drawing]

1 to 3 show one embodiment of the present invention, FIG. 1 is an overall view of a curved tube, FIG. 2 is a cross-sectional view thereof, and FIG. 3 is a cross-sectional view showing the curved tube in a curved state. It is. DESCRIPTION OF SYMBOLS 1... Coil, 2... Linear body, 3a, 3b... Connecting part, 4... Curving operation wire, 5... Knot part, 6...
・Wire guide. Applicant's agent Patent attorney Jun Tsuboi 4 Figure 2

Claims (1)

[Claims] A coil is formed by winding an elastic linear body in a helical manner, and connecting portions are provided at both ends of the coil to connect to the flexible tube and tip of the endoscope. A plurality of joints formed by closely fixing the linear bodies to each other in the axial direction are provided at approximately equal intervals, and a wire guide for guiding the bending operation wire is attached to the inside of the joints. A curved tube for endoscopes.