JPS61217128A - Endoscope - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an endoscope having an improved structure for attaching an angle operation wire.

[Technical background of the invention and its problems]

Generally, in order to select the direction of the tip of the insertion tube in an endoscope, a curved tube is formed near the tip of the insertion tube, and this curved tube can be bent remotely using an angle control wire made of stranded wires. (See Utility Model Application Publication No. 11591/1983).

The above-mentioned angle operation wire is connected to the operation mechanism of the hand operation section through the insertion section of the endoscope, but the intermediate part of the wire is inserted into a guide ring protruding from the inner surface of each curved top in the curved tube section. In addition, in the flexible tube section on the proximal side of the curved tube section, the guide tube made of a tightly wound coil is inserted and guided. Therefore, as the angle operating wire is pushed or pulled or the insertion portion, especially the curved tube portion, is bent, the angle operating wire slides inside each of the guide ring and the guide tube, causing wear. Moreover, the tip of the angle operation wire is completely fixed to the tip of the insertion tube (
Since it is fixed (fixed), the point of sliding contact with the guide ring or guide tube can always be identified. Therefore, since the wear point is always the same, damage from that point is significant, ultimately shortening the life of the angle operating wire. moreover,
The fact that the tip of the angle operating wire is completely fixed means that even if the angle operating wire is twisted, it cannot be released, and torsional stress is constantly applied, which also reduces the lifespan of the angle operating wire. This caused the shrinkage of the .

[Purpose of the invention]

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to improve the durability of the angle operating wire by preventing the sliding contact points of the angle operating wire from being specified and relieving torsional stress. Our goal is to provide endoscopes.

[Summary of the invention]

The present invention provides a mounting tool for connecting the tip of the angle operating wire to the distal end side of the curved pipe portion, and this mounting tool rotates around the longitudinal direction of the angle operating wire and rotates the angle operating wire. This is an endoscope that is attached so that it can be moved forward and backward.

[Embodiments of the invention] Hereinafter, one embodiment of the present invention will be described based on the drawings.

Reference numeral 1 in FIG. 1 is an insertion section of an endoscope, and this insertion section 1 is formed by connecting a distal end member 4 to the distal end of a flexible tube section 2 on the proximal side via a curved tube section 3. The flexible tube section 2 has a mesh tube 6 fitted around the outer periphery of a helical tube 5, and the outer periphery is covered with an outer skin 7, so that the flexible tube section 2 can be freely bent by receiving an external force. The bending tube part 3 is formed by rotatably connecting a plurality of bending rods t8, and sequentially covering the outer periphery of a core material 9 which can be bent vertically and horizontally with a mesh pipe 10 and an outer skin 11. In addition, in order to make it easier to remove, Fig. 1 shows an example in which each bending piece 8... is connected with pins 12... at the left and right positions so that it can rotate only in the vertical direction, but every other bending piece 8... By positioning the bins 12 upward and downward, they can be bent vertically and horizontally.

Furthermore, four angle operation wires 13 are arranged inside the insertion section 1 along the upper, lower, left, and right inner walls.

Each tip of each angle operation wire 13 is connected to the most advanced bending piece 8 which is fixedly attached to the tip member 4 using a fitting 14, which will be described later. Further, the intermediate portion of each angle operation wire 13 is guided through a guide installed within the insertion section 1. That is, in the bending tube portion 3, as shown in FIG. 1, the guide ring 15 is inserted through a cut-and-raised piece formed by cutting and raising a portion of each bending piece 8.

Further, inside the flexible tube section 2, a guide tube 16 made of a tightly wound coil is inserted. The tip of each guide tube 16 is connected to the spiral tube 5 and the curved tube portion 3 of the flexible tube 2, respectively.
The attachment is fixed with respect to the connecting pipe 1°7 that connects the core material 9.

The middle portion of the guide tube 16 is free within the flexible tube section 2. Further, the proximal end of each angle operation wire 13 is connected to an operation mechanism provided in the operation section of the endoscope, and is pushed and pulled by this operation mechanism.

On the other hand, the mounting tool 14 for mounting and fixing the tip of the angle operation wire 13 is not a short tube member, as shown in FIG. is fixed.

Furthermore, the center direction of the hole of the attachment tool 14 coincides with the longitudinal direction of the angle operation wire 13, so that the angle operation wire 13 is inserted as is. and,
A bulging member 18 for preventing removal is fixed to the penetrating tip of the angle operation wire 13.

Therefore, the tip of the angle operation wire 13 is attached to the tool 14 so that it can rotate freely around the longitudinal direction of the angle operation wire 13 and has a degree of freedom so that it can move within a certain range in the forward extrusion direction. are connected.

Therefore, when the bending tube section 3 is bent by pushing or pulling the angle operation wire 13, or when the insertion section is bent, the angle operation wire 13 rubs against the guide ring 15 and the guide tube 16. In particular, the guide ring 15 of the curved tube portion 3 is easily rubbed. However, since the tip of the angle operation wire 13 is free to rotate, the angle operation wire 13 rotates each time such an operation is performed. It also moves forward and backward. This prevents the area rubbed by the guide ring 15 from changing over time and causing wear in only specific areas. Furthermore, even if twisting is applied to the angle operation wire 13, it can be easily released by rotating, and large torsional stress is not applied.

Although the guide ring in the above embodiments is formed integrally with the top member, a separate ring member may be attached and fixed to the TM material.

〔Effect of the invention〕

As explained above, in the present invention, since the tip of the angle operation wire is attached with a degree of freedom in the rotational direction and the front-back direction, local wear of the angle operation wire can be prevented and its durability can be improved. . Furthermore, the durability of the angle operating wire is improved since the twisting applied to the angle operating wire is also relieved and torsional stress is not increased.

[Brief explanation of the drawing]

The drawings are side sectional views of the vicinity of the distal end of the insertion section showing one embodiment of the present invention, and FIG. 2 is an enlarged sectional view of the wire attachment section. DESCRIPTION OF SYMBOLS 1... Insertion part, 2... Curved tube part, 13... Angle operation wire, 14... Installation tool, 15... Guide ring, 16-... Guide tube, 18... Expansion Extrusion parts. Applicant's representative Patent attorney Atsushi Tsuboi Figure 1 Figure 2 Procedural amendment (method) % formula % 1. Indication of the case Japanese Patent Application No. 1983-247412 2. Name of the invention Endoscope 3. Person making the amendment Relationship to the case Patent applicant name (037) Olympus Optical Industry Co., Ltd. 4, agent dated March 25, 1986. Corrected to ``Figure 1''.

Claims (1)

[Claims] An endoscope in which an angle operation wire is inserted through a guide installed in the insertion section to guide the angle operation wire, and the bending tube section of the insertion section is operated to bend by the angle operation wire,
A fitting for connecting the tip of the angle operating wire is provided on the distal end side of the curved pipe portion, and the fitting is attached so that it can rotate around the tip of the angle operating wire and move freely in the front and rear directions. endoscope.