JPH01201227A - Endoscope - Google Patents

Abstract

PURPOSE:To eliminate a swelling-out part at the tip part of of an upper-most curved frame, to minimize the diameter of a tip constituting part and to decrease the pain of a patient by forming a notch part at the tip side of a side surface swelling-out part. CONSTITUTION:A side surface swelling-out part 40 to swell in a diameter direction at a side wall is formed at a curved frame 25 to position at the upper-most edge, and therefore, the side surface swelling-out part 40 protects the coupling part of the tip edge part of a tube 38 for a forceps channel. Even when the diameter of the coupling part is larger, the side surface swelling-out part 40 is swelled to the outside, and therefore, a large diameter part is not contacted at the curved frame 25. Since a notch part 41 is formed at the tip side of the curved frame 25 even from the swelling part 40, the swelling part does not exist at the tip surface of the curved frame 25, consequently, it is not necessary to form the swelling part at a main body member 26 of a tip constituting part 6 to couple the curved frame 25, and therefore, the diameter of the tip constituting part 6 can be minimized compared with the conventional diameter. Thus, it is easier to insert the endoscope into the body cavity of the patient and the pain of the patient is minimized.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an endoscope with an improved insertion section.

[Conventional technology]

Generally, in an endoscope, as the diameter of a built-in component such as a light guide, an image guide, or a forceps channel tube made of an optical fiber bundle inserted into an insertion section increases, the diameter of the tip component increases.

A specific example of a conventional endoscope will be explained based on FIGS. 6 and 7. Curved portion 5 formed on the distal end side of the insertion section
The core material 20 is constructed by connecting a plurality of curved portions 23 longitudinally and movably in sequence by pins 24. Among the plurality of curved portions 23 . . . , the distal end portion of the curved portion 25 located at the most distal end is connected and fixed to the main body member 2G of the distal end forming portion 6 .

Built-in parts such as a light guide 35 made of an optical fiber bundle, an image guide (not shown), or a forceps channel tube 38 are inserted into the curved part 5, and these built-in parts are inserted into the curved part 5. is the distal end side connecting pipe member 32.3 fitted into the main body member 26 of the distal end component 6.
7 is connected.

In this case, the connection between the built-in parts 35 and 38 and the distal side connecting pipe member 32°37 will be provided inside the curved part 25 located at the most distal end, and the connection between the built-in parts 35 and 38 and the distal side connecting pipe member 32. Since the connecting portion with the pipe members 32 and 37 has a large diameter, a large space is required and the rigidity is also large.

For this reason, conventionally, the curved portion 25 located at the leading edge
In this case, a side bulge 40 as shown in FIG. 7 is formed. This side bulging portion 40 swells in the radial direction of the curved portion 25, and the connecting portion between the built-in component 35.38 having a larger diameter and the distal end side connecting pipe member 32.37 comes into contact with the curved portion 25. This is to avoid doing so.

[Problem to be solved by the invention]

However, in the above-mentioned conventional case, the side bulge 40 formed on the curved section 25 located at the most distal end extends continuously in the axial direction to the distal end surface of the curved section 25. It has a structure in which a bulge is also formed on the tip surface.

In such a case, it is necessary to create a partial bulge in the main body member 26 of the tip component 6 to which the curved part 25 is connected,
As a result, a wasted space 70 is created and the diameter of the tip component 6 becomes large.

When the diameter of the distal end component 6 becomes large, it becomes difficult to insert it into a patient's body cavity, causing problems such as causing pain to the patient.

The present invention aims to provide an endoscope in which the diameter of the tip component can be reduced, thereby reducing the possibility of the endoscope being inserted into a patient's body cavity and causing pain to the patient. .

[Means to solve the problem]

The present invention connects a plurality of curved parts rotatably to form a core member of the curved part, connects the curved part located at the most distal end to the main body member of the distal end component, and has built-in objects in the curved part. This is applied to endoscopes that have side bulges that prevent the largest diameter part of the built-in components from coming into contact with the most extreme curved part. , characterized in that a notch is formed on the distal end side of the side bulge.

[Effect]

According to the present invention, since the notch is formed on the distal end side of the side bulge, there is no bulge on the distal end surface of the most distal curved section, and therefore the diameter of the distal end component can be reduced. As a result, it becomes easier to insert the distal end of the endoscope into the patient's body cavity, and pain to the patient is reduced.

〔Example〕

The present invention will be explained below based on an embodiment shown in FIGS. 1 to 3.

FIG. 3 shows the entire endoscope, which includes a long insertion section 11, an operation section 2, and a light guide cable 3. As shown in FIG.

The insertion section 1 is formed by connecting a distal end component 6 to the distal end of a flexible tube section 4 connected to the operating section 2 via a curved section 5 . The curved portion 5 includes an angle knob 7 provided on the operating portion 2.
It is designed to be curved remotely by operation 7.

The operation section 2 is provided with an air/water supply button 8, a suction button 9, a forceps opening IO, and an eyepiece section 11.

Further, an illumination window 12 and an observation window 1 are provided on the distal end surface of the distal end component 6.
3. A lens 14 and a forceps opening 15 are provided.

The formation of the tip of the curved portion 5 is shown in FIGS. 1 and 2.

The bending portion 5 is composed of a bending core material 2o, a mesh pipe (not shown) fitted around the outer periphery of the core material 2o, and a rubber outer skin 21 covering the outer periphery of the mesh pipe.

The bending core material 20 has a large number of bending parts 23 arranged along the longitudinal direction of the insertion part l, and these bending parts 23...
are connected by pins 24 so that they can be rotated sequentially, and the whole can be bent vertically and horizontally.

The bending portion 25 located at the most distal end of the bending core material 20 is fitted into the main body member 26 of the tip forming portion 6, and is connected and fixed by screws or a bonding agent (not shown).

The aforementioned illumination window 12, observation window 13, lens 14, and forceps port 15 are formed in the main body member 26 of the distal end component 6. Among these, the illumination window 12 and the forceps port are shown in FIG. 15 is shown.

A cylindrical lens frame 30 is fitted into the main body member 26 of the tip component 6 so as to face the illumination window 12, and this lens frame 30 is provided with spacers 31 and 31 having high reflectivity! 14 lens) is incorporated through the lens. A light guide 33 made of an optical fiber bundle is connected to the lens frame 30 as one of the built-in components. Above light guide 3
3 has a distal end covered with a connecting tube, and a hard part 35 is formed in this illuminated part. The connecting tube is fitted and fixed into the lens frame 30.

Further, the light guide 33 is covered with a protective tube 36, and the tip 36a of the protective tube 36 is cut out diagonally. In this case, the light guide 33
The terminal end of the hard portion 35 is located at the same position as or ahead of the terminal end of the inclined notch 38a of the protective tube 3B.

Further, the terminal end of the hard part 35 of the light guide 33 is located at the first end.
It is located on the tip side of the pin 24.

The body member 26 of the tip structure portion 6 also includes the forceps opening 1.
A connecting tube 37 is fitted within the tip portion 5, and the rear end of the connecting tube 37 protrudes from the main body member 26 of the distal end portion 60. The tip of a forceps channel tube 38, which is one of the built-in components, is fitted and connected to this protrusion.

In this case, the rear end of the connecting tube 37 is tapered to prevent the forceps channel tube 38 from coming off.

A side bulge 40 that swells in the radial direction is formed on the side wall of the curved portion 25 located at the most distal end opposite to the connecting portion at the tip of the forceps channel tube 38 . A large beam portion 41 is formed closer to the tip of the curved portion 25 than the side bulge portion 40 is.

The operation of an embodiment of such a structure will be explained.

Since the curved portion 25 located at the tip end has a side bulge 40 that swells in the radial direction on its side wall, this side bulge 4
0 protects the connecting portion at the tip of the forceps channel tube 38. Even if the diameter of this connecting portion is large, the side bulging portion 40 swells outward, so that the large diameter portion is connected to the curved portion 2.
No contact with 5.

Furthermore, since the notch 41 is formed closer to the distal end of the curved section 25 than the bulged section 40, there is no bulge on the distal end surface of the curved section 25, so that the curved section 25 is not connected. Since there is no need to form a bulge in the main body member 26 of the distal end component 6, the diameter of the distal end component 6 can be made smaller than in the conventional case, which is indicated by the broken line in FIG.

Therefore, it is easier to insert into the patient's body cavity and causes less pain to the patient.

In addition, in the said Example, the case where the side bulge part 40 was formed integrally with the curved part 25 was demonstrated, but this invention is not restricted to this.

That is, FIGS. 4 and 5 show another embodiment of the present invention, in which the bulge portion is formed by a bulge-shaped cover 50 that is separate from the curved portion 25. FIG. In this case, a notch 41 extending in the axial direction is formed in the curved part 25, and a separate bulging cover 50 is glued to the inner end of the notch 41, that is, to the part corresponding to the maximum diameter of the built-in object. Fix it with an agent, etc.

Even in this case, the maximum diameter part of the built-in object can be
0, and this maximum diameter portion does not come into contact with the curved portion 25.

A notch 4 is disposed on the distal end side of the bulging cover 50.
1, there is no bulge on the tip surface of the curved portion 25, and the diameter of the tip component 6 can be reduced.

〔Effect of the invention〕

As explained above, according to the present invention, since the notch is formed on the distal end side of the side bulge, there is no bulge on the distal end surface of the most distal curved section, and therefore the diameter of the distal end component can be reduced. Can be done. As a result, it becomes easier to insert the endoscope tip into the patient's body cavity, and pain to the patient is reduced.

[Brief explanation of the drawing]

1 to 3 show one embodiment of the present invention, FIG. 1 is a sectional view of the distal end of the endoscope, and FIG. 2 is an exploded perspective view of the curved portion and the main body member of the distal end portion. 3 are perspective views of the entire endoscope, FIGS. 4 and 5 show other embodiments of the present invention, and FIG. FIG. 5 is a perspective view with the bulging cover attached, FIGS. 6 and 7 show the conventional structure, and FIG. 6 is a sectional view of the distal end of the endoscope. , 7th
The figure is an exploded perspective view showing the curved part and the main body member of the tip structure part. 1... Insertion part, 2... Operation part, 5... Curved part, θ
...Tip constituent part, 20... Core material of curved part, 21...
- Outer skin, 23.25... Curved portion, 26... Main body member of tip component, 32.37... Connection tube, 35... Light guide, 38... Channel tube, 40.
...Side bulge portion, 41...Notch portion, 50...Bulge type cover. Applicant's agent Patent attorney Atsushi Tsuboi 1 Figure ρ Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Scope of Claims] A plurality of bending pieces are rotatably connected to form a core member of the bending part, and the bending piece located at the most distal end is connected to the main body member of the tip structure part, and the bending piece is connected to the main body member of the tip constituent part, and In an endoscope through which a built-in object is inserted, a lateral bulge is formed to prevent the largest diameter part of the built-in object from coming into contact with the most advanced bending piece. An endoscope characterized in that a notch is formed on the distal end side of the bulge.