JPH04804Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an endoscope with an improved tip nozzle for supplying air and water.

Generally, an endoscope has a tip nozzle attached near the tip of the insertion tube to be inserted into the body cavity, and this is used to supply air and water into the body cavity and to clean the observation window. . However, since the opening of the tip nozzle is formed to be even thinner than the originally thin air and water supply pipe, once it becomes clogged, it is difficult to remove it easily. Furthermore, as a countermeasure against this clogging, it was necessary to replace the tip nozzle, and the air and water supply pipes had to be cleaned at the time of this replacement, which was something that ordinary users could not do on their own. In other words, they had no choice but to rely entirely on specially trained repair personnel.

This invention was made with attention to the above circumstances,
The purpose is to provide an endoscope that can be easily reused by easily removing dirt, etc., even if the tip nozzle becomes clogged with dirt.

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

FIGS. 1 and 2 show a first embodiment, in which reference numeral 1 denotes an insertion section of an endoscope, and this insertion section 1 is for insertion into a body cavity. Inside the insertion portion 1, a feeding path 2 as a conduit for supplying air and water, an insertion channel 3, an image guide 4, a light guide (not shown), and the like are inserted and arranged. A distal end forming section 6 is formed at the distal end of the insertion section 1, and the distal ends of the feeding passage 2 and the insertion channel 3 are opened in the distal wall surface 7 of the distal end constituting section 6, and are optically connected to the image guide 4. An observation window 9 having an objective lens 8 and an illumination window 10 optically connected to the light guide are provided.

A distal end cover 11 made of an elastic material made of rubber is detachably attached to the distal end of the insertion portion 1. That is, the tip cover 11 has a cylindrical portion 12 that fits on the circumferential side of the tip component 6, and a mounting portion 13 that protrudes inward over the entire circumference at the lower end of the cylindrical portion 12. It is provided. The fitted portion of the distal end cover 11 of the distal end forming portion 6 has a diameter smaller than the outer diameter of the insertion portion 1 by the thickness of the cylindrical portion 12, and is provided with a groove 14 into which the attachment portion 13 is fitted. The tip cover 11 is provided with a groove 14 that is fitted onto the tip component 6 and into which the attachment portion 13 is fitted. The tip cover 11 is fitted onto the tip component 6, and the mounting portion 13 is fitted into the groove 14 and fixed.
Furthermore, the tip cover 11 has an opening 15 for the feeding passage 2.
A cover portion 16 that covers the is integrally formed. This cover portion 16 is formed into a plate shape so as not to protrude from the tip wall surface 7 as much as possible, and is
It is attached to be joined to. In addition, in the installed state, a recess 17 is formed in the inner wall of the cover part 16 corresponding to the opening 15 of the transmission path 2 and communicates with the opening 15, and a part of the recess 17 is located outside the observation window 9. It is small and open along the surface. That is, the recess 17 forms a space between it and the wall surface of the tip, and this space is used as the nozzle opening 19 of the tip nozzle 18 that communicates with the feeding path 2.
This nozzle port 19 opens to the outside in a direction along the outer surface of the observation window 9.

Thus, in the first embodiment, when the tip cover 11 is attached, the tip nozzle 18 is formed. When water or air is fed through the feeding path 2, the water or air can be injected from the nozzle port 19 of the tip nozzle 18 toward the outer surface of the observation window 9.

Further, when the insertion section 1 is introduced into the body cavity, or when the inside of the body cavity is pressurized by an air supply operation, dirt and the like are likely to enter the nozzle port 19. If the tip nozzle 18 becomes clogged as clinical cases are repeated, the user pulls the protrusion 13 away from the groove 14 to remove the tip cover 11 from the tip of the insertion section 1. Remove. As a result, the internal space forming the nozzle port 19 is opened, and the opening 15 of the feed passage 2 is also opened.
This tip nozzle 18 and the feed passage 2 can be easily cleaned.

3 and 4 show other embodiments of the present invention. This embodiment is a distal end cover 11 that covers the distal end wall surface 7, and a lid portion 20 that covers the wall surface other than the opening of the insertion channel 3, the observation window, and the illumination window 10 is integrally formed. Furthermore, the observation window 9 side of the opening 15 of the feed passage 2 is shaved off obliquely to form an inclined surface 21, and the surface of the cover portion 16 facing the opening 15 is formed into a recess 22. This tip cover 11 is made of an insulating elastic material made of rubber, and its attachment is the same as in the first embodiment. In this embodiment, the tip wall surface 7 is also covered with the insulating tip cover 11, so electrical safety is improved.
Moreover, the opening 15 is made into an inclined surface 21, and the cover part 16
Since the inner surface is made into a recess 22, the cover portion 16 can be made low, and vignetting of the field of view does not occur even when the optical system is widened.

Although the above embodiments have been described with respect to a direct-viewing endoscope, the present invention can also be applied to a side-viewing endoscope in which a distal end nozzle is formed on the side wall of the distal end of the insertion portion.

As explained above, according to the present invention, even if the tip nozzle is clogged with dirt, a normal user can easily and quickly remove the dirt and the like and immediately reuse it.

[Brief explanation of the drawing]

FIG. 1 is a front view of the tip of the insertion tube in one embodiment of the present invention, FIG. 2 is a side sectional view of the tip of the insertion tube, and FIG. 3 is a front view of the tip of the insertion tube in another embodiment of the present invention. , FIG. 4 is a side sectional view of the distal end of the insertion portion. DESCRIPTION OF SYMBOLS 1...Insertion part, 2...Transmission path, 7...Tip wall surface, 11...Tip cover, 13...Mounting part, 14
... Groove, 15 ... Opening, 18 ... Tip nozzle, 1
9...Nozzle mouth.

Claims (1)

[Scope of utility model registration request] It has an insertion section to be inserted into a body cavity, a delivery passage formed in the insertion section and opening on a wall near the tip of the insertion section, and a mounting section that is detachably attached to the tip of the insertion section. A tip cover is provided between the tip wall surface and the tip cover made of an elastic material, the nozzle opening of the tip nozzle communicating with the feeding passage being formed in an open state, and at least other than the tip nozzle forming the same plane as the wall surface near the tip. An endoscope that is characterized by: