JPS6220161Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a heat-retaining tube for a rigid endoscope, specifically, a heat-retaining tube for a rigid endoscope, which is used to prevent the objective window from fogging up due to body temperature when the rigid endoscope is inserted into the body cavity. This invention relates to a heat-retaining tube that preheats an endoscope to a temperature approximately equal to the temperature inside a body cavity.

As shown in FIG. 1, a conventional heat-retaining tube 1 has a cylindrical tube 2 into which a body cavity insertion section 6 of a rigid endoscope 5 is inserted and removably inserted, and a distal end of this cylindrical tube 2 that is screwed into the tube. It is composed of a lid 3 which is removably attached to the lid. This heat-retaining tube 1 is removably inserted into the heating opening 4a of the heater 4 with the end closed by the lid 3 as the tip, and is heated to a constant temperature of, for example, 40°C to 50°C. Then, the body cavity insertion section 6 of the rigid endoscope 5 is inserted into the heat insulating tube 1 heated by the heater 4 and warmed. By inserting the rigid endoscope 5 into the heat-retaining tube 1, the body cavity insertion part 6 of the rigid endoscope 5 is heated to a temperature approximately equal to the body cavity temperature, and in particular, the objective of the objective optical system at the distal end is heated. The window cover glass 7 is heated.

By the way, the heat-retaining tube 1 is subjected to high-temperature treatment for the purpose of sterilizing and disinfecting the clean rigid endoscope, so that the cylindrical tube 2 and lid 3 of the heat-retaining tube 1 are heat-resistant. It is made of a material that has , i.e. metal.

Therefore, if the body cavity insertion part 6 of the rigid endoscope 5 is carelessly and forcefully inserted into such a heat-retaining tube 1,
The cover glass 7 of the objective optical system, the cover glass of the illumination optical system, etc. at the tip of the intrabody cavity insertion part 6 collide with the hard metal lid 3, and as a result, the cover glass and further the internal It also had the drawback of damaging the optical system.

The purpose of the present invention is to eliminate the above-mentioned drawbacks.
An object of the present invention is to provide a heat-retaining tube for a rigid endoscope in which an elastic shock-absorbing member is provided inside the closed end of the heat-retaining tube, which is opposed to the objective window of the rigid endoscope.

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

FIG. 2 is a sectional view of a heat-retaining tube for a rigid endoscope, showing an embodiment of the present invention. This heat-retaining tube 11, like the above-mentioned heat-retaining tube 1, has a metal cylindrical tube 12 and a metal lid 13 removably attached to the tip of the tube by screwing. Lid 1
A buffer body 14 is disposed inside the cylindrical tube 12 in close contact with the lid 13. The buffer body 14 is made of a shock absorbing material, such as silicone rubber, which has excellent heat resistance and chemical resistance, has relatively good thermal conductivity, and has elasticity. This cushioning body 14 prevents the cover glass 7 from hitting the cushioning body 14 when the rigid endoscope 5 is inserted into the heat-retaining tube 11 even if the body cavity insertion section 6 is accidentally and suddenly advanced deep into the body cavity. The impact caused by the contact is absorbed, and direct contact with the metal lid 13 is avoided.

This heat-retaining tube 11 is also easy to clean because the buffer body 14 is removed from the cylindrical tube 12 by removing the lid 13 from the cylindrical tube 12. Then, the assembly is performed by fitting the buffer body 14 into the locking step 12a provided on the inner surface of the tip end of the cylindrical tube 12, and then fitting the lid 1.
3 to the tip of the cylindrical tube 12, the buffer body 14 is stably fixed inside the lid 13.

FIG. 3 is an enlarged cross-sectional view of a main part of a heat-retaining tube showing another embodiment of the present invention. This heat preservation tube 21 has a metal lid 23 screwed onto the tip of a cylindrical tube 22, and a buffer body 24 made of silicone rubber or the like and a coil spring 25 are arranged inside the cylindrical tube. . The buffer body 24 is urged inward of the cylindrical tube 22 by the elasticity of the coil spring 25, and its peripheral edge is locked to a locking step 22a provided on the inner surface of the tip of the cylindrical tube 22. . In addition, the buffer body 24 has a surface 24a facing the distal end of the body cavity insertion section 6 of the endoscope 5 entered into the cylindrical tube 22, which is in planar contact with the distal end surface including the cover glass 7 at the distal end of the insertion section 6. It is formed in a concave shape to prevent

A rigid endoscope 5 is attached to the heat insulating tube 21 configured as described above.
When the body cavity insertion part 6 is vigorously inserted until it collides with the buffer body 24, the impact caused by the collision is transmitted to the buffer body 24 and the coil spring 25, is absorbed by these shock absorbing members, and the shock is absorbed by the buffer body. 24 does not directly hit the cover glass 7, but hits a portion other than the glass around it, and as a result, damage to the cover glass 7 and the like is prevented.

Note that instead of the buffer body 24, it may be made of a rigid body, and the shock may be absorbed by only the coil spring 25.

FIG. 4 is an enlarged cross-sectional view of a main part of a heat-retaining tube showing still another embodiment of the present invention. This heat-retaining tube 31 has a buffer body 34 at the tip of the cylindrical tube 32 to be closed.
The lid is made up of This heat retaining tube 31 has an annular fitting groove 3 on the outer periphery near the tip of the cylindrical tube 32.
The shock absorber 34 is made of rubber and has a hat-like shape, and an inward convex portion 34b formed on the inner surface of the lower end of the peripheral wall 34a fits into the fitting groove 32a. , is attached to the cylindrical tube 32. The buffer body 34 has elasticity, and the peripheral wall 34a is thin and deformable, making it easy to attach and detach. This heat-retaining tube 31 also absorbs the impact caused by the insertion of the body cavity insertion portion 6 of the rigid endoscope 5 through the buffer body 34 . Since the buffer body 34 also serves as a lid, the heat insulating tube 31 has a small number of parts, has a simple structure, and can be manufactured at low cost.

As described above, according to the present invention, since an elastic shock absorbing member is provided inside the closed end of the heat insulating tube, the cover glass due to collision with the objective window and illumination window of the rigid endoscope, This makes it possible to prevent destruction and damage to the objective optical system and illumination optical system, and has excellent effects such as eliminating the conventional drawbacks and ensuring that the endoscope is kept warm.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an example of a conventional heat-retaining tube for a rigid endoscope, FIG. 2 is a cross-sectional view of a heat-retaining tube showing an embodiment of the present invention, and FIG. FIG. 4 is an enlarged cross-sectional view of a main part of a heat-retaining tube showing another embodiment of the present invention. 4... Heater, 5... Rigid endoscope, 7... Objective window, 11, 21, 31... Heat retention tube, 12, 22,
32... Cylindrical tube, 13, 23... Metal lid, 1
4, 24, 34...buffer (shock absorbing member), 2
5...Coil spring (shock absorbing member).

Claims (1)

[Scope of Claim for Utility Model Registration] A rigid endoscope that is heated by a heater and kept at a constant temperature, and is used to keep the rigid endoscope warm by inserting the rigid endoscope into the interior in a removable manner. A thermal insulation tube for a rigid endoscope, characterized in that an elastic shock-absorbing member is provided inside the closed end of the rigid endoscope, where the distal end surface on which the objective window etc. are disposed is opposite. Heat retention tube.