JPH0642643Y2 - Objective lens cleaning device for endoscope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an objective lens cleaning device for an endoscope.

[Conventional technology]

The surface of the objective lens located at the tip of the endoscope is often contaminated by body fluid such as blood and becomes invisible, but the body fluid attached to the surface of the objective lens is also exposed at the tip of the air supply pipe. Water or air fluid from the
It is designed to be blown away and washed.

[Problems to be solved by the device]

As shown in FIG. 6, the conventional typical cleaning device basically attaches a tubular nozzle 104 bent at a right angle in an L-shape to the tip of the air / water supply pipe 3 by screwing or fitting. The direction of the fluid 109 ejected from the nozzle 104 is a plane including the axis of the air / water supply pipe 3 due to a processing error of the nozzle 104 and a slight variation in the mounting angle of the air / water supply pipe 3. Within the same plane, and also in the plane orthogonal to the axis, there is often considerable variation so that the jet fluid often does not hit the surface of the objective lens well.

It is extremely difficult to adjust the direction of the jetted fluid 109 so as to hit the surface of the objective window well, and the fact is that trial and error hand-finishing work such as hitting the nozzle with a hammer is forced. .

[Means for Solving the Problems]

The present invention has been made to solve the above problems, and is an rotatably provided L-shaped passage (41) which is provided at the tip of an air supply and water supply pipe (3) of an endoscope so as to be rotatable at a right angle. ), A spherical L-shaped passage nozzle (4) formed therein, and a retainer fixing member (5) that is fixed to the distal end portion (1) of the endoscope and press-fixes the L-shaped passage nozzle. It is an objective lens cleaning device for a mirror.

[Action]

By loosening the retainer fixing member, the spherical L-shaped passage nozzle can be freely rotated, and the ejection direction of the L-shaped passage can be adjusted in all directions.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. 1 and 2.

As is well known, at the distal end portion 1 of the endoscope, in addition to the objective window 2,
The two illumination windows 7, 7, the forceps hole 8 and the air / water supply pipe 3 are open, but in this embodiment, the open end of the air / water supply pipe 3 is
An L-shaped passage 41 that is spherical and is bent at a right angle into an L-shape inside
The L-shaped passage nozzle 4 in which the
The letter passage nozzle 4 has a structure in which it is held and fixed by a holding and fixing member 5 which is screwed to a tip end portion thereof by a fixing screw 51.

As can be seen from FIG. 2, the retainer fixing member 5 has a rectangular plate shape, and the end portion on the side opposite to the side on which the fixing screw 51 is screwed has a hemispherical shape as shown in FIG. The inner surface of the retainer is rough and the coefficient of friction is increased,
This fixes the spherical L-shaped passage nozzle 4.

More important is the structure of the L-shaped passage nozzle 4.

The L-shaped passage nozzle 4 has a spherical shape as shown in an enlarged view in FIG. 5, and includes an inlet-side passage 41A extending along one diameter thereof and an ejection-side passage 41B substantially orthogonal to the inlet-side passage 41A. An L-shaped passage 41 is formed.

In the cleaning device of this invention, first, the L pipe is installed at the opening end of the air supply / water supply pipe 3.
The character passage nozzle 4 is placed so that the inlet-side passage 41A is aligned with the axis, and the retainer fixing member 5 is screwed from above with the fixing screw 51 to assemble. Therefore, if the fixing screw 51 is loosened a little, the spherical L-shaped passage nozzle 4 can freely rotate in all directions, and in this case, it is possible to adjust the rotation at a minute angle. More importantly, after the angle adjustment, Immediately, the fixing screw 51 can be tightened to fix the adjustment state. For this reason, the ejection direction of the fluid 9 ejected from the ejection side passage 41B of the L-shaped passage nozzle 4 can be adjusted in a minute angle in any direction.

Considering the adjustment process of the L-shaped passage nozzle 4 described above,
It is rather difficult to do because the spherical L-shaped passage nozzle 4 becomes completely idle when the fixing screw 51 is loosened, and it is preferable that the nozzle is elastically held light. For this reason, as the retainer fixing member 5, an elastic material member plate such as a stainless steel plate or a polypropylene molding plate is suitable.

FIG. 3 shows another embodiment of the present invention, in which the one holding down the L-shaped passage nozzle 4 is integrated with a part of the hood 6 attached to the endoscope distal end portion 1. It is a retainer fixing member 62 that is formed as a unit.

The hood 6 and the tip portion 1 are fitted into each other by concavo-convex fitting so that when the hood 6 is fitted, it fits with the punch. In this fitted state, the hold-down fixing member 62 presses and fixes the nozzle 4.

[Effect of device]

According to this invention, since the L-shaped passage nozzle has a spherical shape, and the L-shaped passage nozzle is pressed and fixed by the retainer fixing member fixed to the distal end portion of the endoscope, the rotation adjustment of the L-shaped passage nozzle, That is, the direction of the L-shaped passage in the inside can be easily adjusted, the adjustment state can be immediately fixed, and the fluid such as water ejected from the air supply pipe can be accurately guided to the surface of the objective lens. Has the effect of being extremely easy.

[Brief description of drawings]

1 is a side sectional view showing an embodiment of the present invention, FIG. 2 is a plan view showing an end face of a tip portion, FIG. 3 is a side sectional view showing another embodiment of the present invention, and FIG. 1. FIG. 5 is an enlarged sectional view of the L-shaped passage nozzle, and FIG. 6 is a simplified side sectional view showing a typical example of the prior art. 2 ... Objective lens, 3 ... Air supply water pipe, 4 ... L-shaped passage nozzle, 41 ... L-shaped passage, 41A ... Inlet side passage, 41B ... Jet side passage, 5,62 ... Hold-down fixing plate, 51, 61 ... Fixed Screw, 6 ... Guide hood.

Claims (1)

[Scope of utility model registration request] 1. An L-shaped passage (4) which is rotatably provided at the tip of an air supply / water supply pipe (3) of an endoscope and which bends substantially at a right angle inside.
1) A spherical L-shaped passage nozzle (4) formed, and a hemispherical holding portion that is fixed to the distal end portion (1) of the endoscope and press-fixes the L-shaped passage nozzle (4). An objective lens cleaning device for an endoscope having a holding member (5).