JPS63216527A - Tube for channel in 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 [Field of Industrial Application] The present invention relates to a channel tube for an endoscope, and particularly to a channel tube for an electronic scope.

[Prior Art] Conventionally, a channel tube constituting a channel for inserting a treatment instrument that is provided in a flexible tube of an endoscope, especially an electronic scope, has a filling ratio of built-in members on the rear end side of the flexible tube. Despite the low value, the filling rate of the members built into the distal end is high, resulting in a tube with a small diameter over its entire length, and therefore only a channel with a narrow inner diameter could be placed.

Therefore, when using a treatment instrument, the treatment instrument occupies the inside of the tube, and as a result, when inhaling air into the body cavity, the amount of suction is drastically reduced, which poses a problem in the treatment. Ta.

[Problems to be Solved by the Invention] As described above, in conventional endoscopes, especially electronic scopes, solid-state imaging devices (hereinafter referred to as CCDs), ICs, and capacitors are mounted on the distal end side of the 1111 flexible tube.

Because internal organs such as resistance take up a lot of space,
Even if the channel tube becomes thinner and the amount of suction is insufficient when using the treatment instrument, the structure is unavoidable and no equivalent measures have been taken.

Therefore, an object of the present invention is to provide an endoscope that can greatly increase the amount of suction without changing the structural limitations, that is, the outer diameter of the flexible tube and the arrangement of the internal components on the distal end side of the flexible tube. To provide tubes for channels in mirrors.

[Means and effects for solving the problems] The present invention has the following features:
In order to achieve the above object, the cross-sectional shape of the entire length or part of the channel tube is changed so as to correspond to other built-in objects disposed within the flexible tube.

[Example] Hereinafter, the present invention will be explained based on illustrated embodiments.

FIG. 1 is a front view of the tip of an electronic scope equipped with a channel tube showing an embodiment of the present invention, FIG. 2 is a sectional view of the tip of the electronic scope, and FIG. 3 (A) ,
(B) shows a cross-sectional view taken along line AA and line BB in FIG. 2, respectively.

In Figures 1 to 3, numeral 1 is the electronic scope body, 2 is the objective optical system lens, 3 is the CCD chip, and 4 is the same chip 3.
A glass filter 5 covers the front surface of the base, 6 is fixed to the base 5, and an IC.

An electric circuit board on which a CCD-related member 7 such as a capacitor C1 resistor R and a preamplifier is arranged, and 8 connects the COD-related member 7 to an external device (not shown) via the hand control unit of the electronic scope. 9 is a channel tube of the present invention, 10 is an air/water supply channel, 11 is a light guide,
12 designates flexible mantle tubes, respectively.

As shown in FIG. 2, in the electronic scope 1, a CCD-related member 7 such as an imaging CCD chip 3 and an IC for driving the chip is arranged inside the objective optical system 2 at the tip. However, there is no image guide made of an optical fiber bundle like in an optical endoscope in the rear central part, and there is a light guide 11 with a relatively small diameter and an air/water supply channel 11.
Other than that, there is simply a signal line cable 8 along the inner wall of the flexible jacket tube 12. Therefore, in electronic scope 1, there is a large difference in the filling rate of built-in materials between the distal end and the rear end. It is possible to form the diameter only within the range of 100 to 100 mm, and there is ample room inside the flexible tube at the rear end side.

In the present invention, paying attention to this point, the diameter of the channel tube 9 is appropriately modified according to the filling state of the built-in contents, and the cross-sectional area is made almost constant at any location. That is, FIGS. 2 and 3 (A)
, As shown in (B), the tip side has an oblong elliptical shape 9a that avoids the built-in components and corresponds to the gap, and the rear end side has a cylindrical shape 9b, and the cross-sectional area is the same at both locations. It looks like this. By doing this, the cross-sectional area of the treatment instrument insertion channel can be significantly increased, whereas conventionally only a small diameter pipe inscribed in the elliptical shape could be disposed. Therefore, even if the treatment instrument is inserted through the center of the channel tube 9, there is a gap on both sides of the channel tube 9, which greatly increases the amount of suction and facilitates the forceps treatment. Since the tube 9b has a different filling rate and arrangement of internal components from the distal end side, the tube 9b can have a much larger diameter than the conventional tube, as shown in FIG. 3(B).

In this embodiment, the cross-sectional shape of the channel tube 9a on the distal end side is made into a horizontally elongated oval shape, but this is different from that in the fourth embodiment.
As shown in Figures (A), (B), and (C), a flat tube 13.degree. and a half-moon tube 14.according to the structure of the internal components. The tube 15 can be shaped to make maximum use of the space, such as a cross-shaped tube 15. Even if the cross-sectional area of such a portion is made somewhat smaller, if the length is short, the overall suction amount will be negligible.

FIG. 5 is a sectional view of the distal end of another example of an electronic scope in which the channel tube of the present invention is disposed. Since this electronic scope 21 is also constructed in substantially the same manner as the electronic scope 1 shown in FIG. 2, the same constituent members are designated by the same reference numerals and their explanations will be omitted. The CCD chip 3 in this electronic scope 21 is connected to the objective optical system 2.
It is arranged below the right angle prism 22 arranged at the rear of the flexible tube at the widest area of the diameter part of the flexible tube, and captures an image of him reflected downward at right angles by the same prism 22. It looks like this. 1. The prism 22 has its lower surface fixed to a glass substrate 23 on which an electric circuit is formed, and the CCD chip 3 is arranged below it. A capacitor C2 resistor R is provided behind the glass substrate 23.
, IC, and other CCD-related members 7 are provided. In the case of the electronic scope 21 configured in this way, since the CCD chip 3 is placed below the objective optical system 2, the gap between the CCD chip 3 and the flexible outer tube 12 becomes narrower. By making this part of the tube 9 into any suitable shape, it is possible to obtain the same effect as the channel tube in the electronic scope I shown in FIG. 2 above.

FIG. 6 shows a glass plate in which the CCD chip 3 shown in FIG. 5 above is bonded directly to the lower surface of the rectangular prism 22, and the CCD-related member 7 shown in FIG. This figure shows an example of an electronic scope (21A) in which the tip of the substrate 23 is polymerized and fixed.

FIG. 7 shows an example of an electronic scope 21B in which the means for identifying the CCD chip 3, CCD-related member 7, etc. of the electronic scope as described above to the tip component 24 is changed. That is, the objective optical system lens 2 and the CCD chip 3
．． The tip component member 24 on which the CCD-related member 7 is disposed is formed by filling it with a contact agent 25, in which the above-mentioned members are arranged and fixed together as a whole, and the angle wire is The tip of No. 26 is also embedded and fixed.

Although the above embodiments have been described with respect to electronic scopes, it goes without saying that the present invention can be applied to all endoscopes including fiberscopes.

[Effects of the Invention] As explained above, according to the present invention, a channel tube for an endoscope can be provided, which can greatly increase the amount of suction without changing the outer diameter of the flexible tube or the structure of the internal components. can be provided.

[Brief explanation of the drawing]

1 is a front view of the distal end of an electronic scope in which a channel tube is arranged, showing one embodiment of the present invention; FIG. 2 is a sectional view of the distal end of the electronic scope shown in FIG. 1; 3(A) and (B) are cross-sectional views taken along the lines AA and BB in FIG. FIGS. 5 to 7 are sectional views showing other modifications of the channel tube, respectively, and FIGS. 5 to 7 are sectional views of the distal end of another example of an electronic scope in which the channel tube of the present invention is disposed. 1, 21.21A, 21B...Electronic scope (electronic endoscope)

Claims (1)

[Claims] In a channel tube that is provided along the length of the flexible tube of an endoscope and constitutes a conduit for suction, liquid suction, and insertion of a treatment instrument, the entire length or a portion of the tube is A channel tube for an endoscope, characterized in that the cross-sectional shape of the flexible tube is changed to correspond to other built-in objects disposed within the flexible tube.