JPS59111733A - 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 The present invention relates to an endoscope, and more particularly, the present invention relates to an endoscope, and in particular, a cover glass is attached to the distal end component of the distal end of the body cavity insertion portion of the endoscope using an adhesive or the like.
Breath regarding the fixed endoscopic ψ tip.

FIG. 1 shows a flexible endoscope @1 used for medical purposes.

This synopsis @1 allows you to perform various operations at hand Tx 54! J!
It consists of a working part main body 2 and a flexible long body cavity insertion part 3 inserted into a patient's body cavity. An eyepiece 6 and a focus adjustment knob 7 are provided. Further, a distal end component 8 is provided at the distal end of the insertion section 3, and the distal end component 8 has air and water supply ports 9. Observation window 10. A lighting window 11 is formed.

As shown in FIG. 2, an illumination optical system 13 consisting of an optical fiber bundle 12 and a tip cover glass 18 is provided at the tip end 8 of the wedding ceremony.
An observation optical system 15 consisting of a fiber bundle 12 and an objective lens system 14 and an air and water supply system 16 are provided.

The objective lens system 14 is composed of a prism 17, a cover glass 18 provided at the front of the prism 17, and a rear lens 19 consisting of a lens group provided at the rear.

Further, the cover glass 18 is adhesively fixed to a housing seat 21 provided on the upper surface of the tip component 20 with an epoxy adhesive 22.

When sterilizing the endoscopic priority end 8 constructed in this way by a conventional method, high pressure steam sterilization, dry heat sterilization, etc. are performed. ~130
In some cases, the above adhesive 2
Deterioration such as cracks will occur in the second part.

Furthermore, when the tip 8 is disinfected, disinfectants such as formalin, iodine, alcohol, and aldehyde are used, so the adhesive 22 is not melted by these chemicals. 7. Corrosion resistance is poor. r: p
= This will have an adverse effect on the cover glass 18 and the like.

By repeating the disinfection work and other operations as described above many times, the brittleness of the upper adhesive 22 increases.

The object of the present invention is to eliminate the above-mentioned drawbacks, and to provide a adhesive that has high chemical resistance, is not affected by heat during disinfection, and can be easily applied in place of ordinary adhesives. To provide an endoscope using a fixing agent.

One aspect of the present invention is to achieve the above objectives.

A ceramic coating agent is used to secure the space between the tip end and the cover glass.

Filled with ceramic coating agent instead of ordinary adhesive,
By baking at a low temperature, a bonding agent with high durability, heat resistance, and chemical resistance can be obtained.

Embodiments and drawings illustrating the present invention will be described.

FIG. 3 shows a first embodiment of the present invention. In FIG. 1, the same components as those shown in FIG. 2 are designated by the same numbers, and their explanations are omitted. However, is the cover glass 18 particularly hard? To do this, replace the epoxy adhesive 22! 1llv
c. It is characterized by being fixed by using a ceramic coating agent 23.

η Figure 4 shows the second embodiment, 20 is the tip component paulownia',
Both were filled with a ceramic coating agent 23 using a 24G tip cover glass and fixed at °C. In this embodiment, in order to further increase the adhesive strength, both the tip constituent member 20 and the tip cuckoo glass 24 are provided with thread-like irregularities 20a and 24a, as shown in FIG.

Skin 1.2'y"!: /1fli (ceramic coating agent 23 using IIVr or "Cerami-Riki" (trade name) of Itakki former 41-shi research institute can be used. "Cerami-Riki") is P type.

There are three types: C type and P type.The C type has a heat resistance temperature of 1300℃ or more and is for thin coatings of 75ζ, so it is not suitable for adhering cover glass.The OII type has a heat resistance temperature of 1300℃ or more. It has good chemical resistance (1) at temperatures above 1300℃, strong adhesion, and a viscosity of 1~.6.
It is suitable because it is used for painting.

In addition, in the case of P type, the heat resistance temperature is low at 300°C to 500°C, but it has excellent chemical resistance and water resistance. In addition, the odor at the adhesive part of the cover glass is kept at 300°C even during the disinfection and sterilization stage.
Celsius can also be used for P type since the temperature will not reach above.

Next, the process will be explained with reference to FIG. First, the tip component t
A state in which the prism 17° rear lens 191 of the objective lens system 14 and the optical fiber bundle 12 of the objective lens system 14 are not inserted into J20, and a state in which the optical fiber bundle 12 of the illumination optical system 13 is not inserted, that is, the housing portion 218 recessed in the tip component 20 Accommodation seat 214 in
With the tip cover glass 18 housed, a ceramic coating agent 23 is filled into the gap between the tip cover glass 18 and the tip component 20, and heated at 1100° C. for 20 to 30 minutes. (Because the installation time for "Ceramic Power" is about 20 minutes at 100℃).
It can be fixed to 1.

Thereafter, the aforementioned objective lens system 14 and illumination optical system 13 are inserted and fixed. The final step can be performed by conventional methods.

Note that the tip cover glass 18 described in one or more embodiments.
24 may be implemented by using, for example, a concave lens having a lens tower function in addition to plate-shaped glass, and is not limited to the embodiment shown in FIG.

Now, as shown in the above embodiments, the present invention uses a bonding method using a ceramic coating agent 23 to coat the tip cover glass 1.
8, it is also excellent in disinfection using the above-mentioned chemical solutions, etc.
A tip cover glass 18 having high chemical resistance can be obtained.
Furthermore, even when the above sterilization method is used, it exhibits excellent heat resistance.

Furthermore, in terms of adhesion strength, it is 60 Kg/cJ for iron, stainless steel, etc., and 40 K for aluminum and glass.
g/ctd, it is possible to strongly adhere the tip cover glass and the tip component 20.

In particular, as shown in the second embodiment, the outer circumferential surface of the tip cover glass and the inner circumferential surface of the cover glass accommodating portion of the tip component member are
If it is constructed by providing unevenness on one or both, the adhesive area with the ceramic coating agent will be large.7z
Because of this, strong adhesion is possible, and excellent fatigue resistance is also achieved.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a normal flexible endoscope, Fig. 2 is an enlarged partial sectional view of the distal end of the endoscope shown in Fig. 1, and Fig. 3 is an endoscope diagram showing the first embodiment of the invention. Enlarged partial cross-sectional view of the tip of the fourth
The figure is an enlarged sectional view of a cover glass attachment part showing a second embodiment of the present invention. l...Endoscope 3...Intrabody cavity insertion part 8...Tip configuration part 10.11...Future 12...Optical fiber bundle 18.24...Cover glass 20...Tip configuration Member 21... Accommodating seat 21a... Cover glass accommodating portion 23... Ceramic coating agent

Claims (1)

[Claims] 111 An endoscope provided with a RM fA K cover glass at the tip of the body cavity insertion portion, characterized in that the cover glass is fixed to the distal end component of the distal end portion with a ceramic coating agent. endoscope. (21) The endoscope according to claim 1, wherein the inner circumferential surface of the cover glass accommodating portion of the distal end constituent member of the distal end portion and/or the outer circumferential surface Vr of the cover glass is provided with irregularities. i31 t% II The ceramic coating agent is filled between a housing seat recessed in the tip IS material of the tip portion and a cover glass housed in the housing seat in this housing portion, and then heated. A haiku for the family celebration mentioned in the section.