JP3586312B2 - Simple endoscope device - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a simple endoscope apparatus in which an incident end of a light guide is arranged in an operation unit.
[0002]
[Prior art]
In a so-called simple endoscope device, generally, an incident end of a light guide is arranged in an operation unit, and an illumination light supply unit incorporating a miniature bulb and a dry battery for supplying illumination light to the light guide is provided. The structure is attached to the operation unit.
[0003]
[Problems to be solved by the invention]
The operation section of the endoscope should be made as small and lightweight as possible to improve operability, and a simple endoscope apparatus requiring easy handling needs to be particularly small and lightweight.
[0004]
However, in comparison with a normal endoscope having a structure in which the light guide simply passes through the operation section, the simplified endoscope apparatus in which the light guide has the incident end portion disposed in the operation section has a light guide. Since a mechanism for holding the end portion on the frame is required, the structure in the operation section becomes complicated by that amount, which contradicts the demand for reduction in size and weight.
[0005]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a simple endoscope apparatus capable of easily and efficiently holding an incident end of a light guide in an operation unit and realizing a small and lightweight operation unit.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a simplified endoscope device according to the present invention includes a bending operation mechanism for remotely bending a bendable bending portion formed in an insertion portion and a light for transmitting illumination light. A simple endoscope in which an incident end of a guide is disposed in an operation section connected to a base end of the insertion section, and an illumination light supply unit for supplying illumination light to the light guide is attached to the operation section. In the mirror device, an incident end of the light guide is held at an opposite end of a bending operation bearing member that is fixed to a frame in the operation section and supports the rotation shaft of the bending operation mechanism at one end. It is characterized by the following.
[0007]
【Example】
Embodiments will be described with reference to the drawings.
FIG. 2 is a side view of the operation section 2 of the endoscope, and FIG. 3 is a rear view. A lower end of the operation section 2 is connected to a base end of an insertion section 1 covered with a flexible tube. I have.
[0008]
The lower part of the operation part 2 at about three-quarters is a grip part 2a, and a forceps insertion port part 4 is provided between the grip part 2a and the insertion part 1 so as to project diagonally forward. . Reference numeral 3 denotes a pressure adjusting valve for adjusting the pressure inside the airtight endoscope.
[0009]
A suction operation valve 6 for performing a suction operation through a forceps channel (not shown) inserted into the insertion portion 1 is provided on the operation mechanism portion 5 above the grip portion 2a of the operation portion 2, and a distal end of the insertion portion 1. A bending operation lever 7 for remotely bending a bendable bending portion (not shown) formed on the portion is disposed on the front and rear surfaces, and an eyepiece 8 is provided on the upper surface.
[0010]
An illumination light guide fiber bundle 9 for transmitting illumination light for illuminating a subject has an incident end portion disposed in the operation mechanism section 5 and passes through the insertion section 1 and the grip section 2a of the operation section 2. The emission end is disposed at the tip of the insertion section 1.
[0011]
An illumination light supply unit 40 for supplying illumination light to the light guide fiber bundle 9 is detachably attached to a side surface of the operation mechanism 5.
[0012]
As shown in FIG. 3, the illumination light supply unit 40 includes a light source lamp 42 that emits illumination light to be supplied to the light guide fiber bundle 9, and a battery 100 that is a power supply for lighting the light source lamp 42. And so on. As the battery 100, any battery such as a dry battery or a rechargeable nickel cadmium battery may be used.
[0013]
The battery 100 can be exchanged by removing a cap 50 detachably attached to the end of the illumination light supply unit 40, and an AC / DC adapter or the like can be connected instead of the battery 100.
[0014]
FIG. 1 is a rear cross-sectional view of the upper half of the operation unit 2 with the illumination light supply unit 40 removed. The main body case 11 that covers the operation mechanism unit 5 of the operation unit 2 has an electrically insulating property. It is made of plastic.
[0015]
The bending operation lever 7 is configured by covering an electrically insulating plastic cover 7b on the surface of a metal lever main body 7a, and is connected and fixed to an outer end of a rotatable bending operation shaft 13 by a fixing screw 14. I have. Reference numeral 15 denotes a bearing mounted on the main body case 11 so as to rotatably receive the bending operation shaft 13, and O-rings for sealing are respectively arranged on the inner and outer peripheral surfaces thereof.
[0016]
In the vicinity of the inner end of the bending operation shaft 13, a rotation arm 16 is connected so as to rotate integrally with the bending operation shaft 13, and a base end of a bending operation wire 17 is attached to the rotation arm 16. I have.
[0017]
Therefore, by rotating the bending operation lever 7, the rotation arm 16 is rotated via the bending operation shaft 13, the bending operation wire 17 is pulled, and the bending portion is bent in a predetermined direction.
[0018]
Reference numeral 18 denotes a metal frame fixed in the operation unit 2, and is fixed to the main body case 11 via a metal angle member 19 by a nut 20 for fixing the bearing 15 to the main body case 11. 21 is a small screw for connecting and fixing the metal frame 18 and the metal angle member 19.
[0019]
The space in the operation section 2 is partitioned by the metal frame 18 into a traveling section for the bending operation wire 17 and a traveling section for other members (such as the light guide fiber bundle 9). Reference numeral 24 denotes a support cylinder of the eyepiece, which is fixed to the main body case 11 by a fixing nut 25.
[0020]
A bending operation bearing member 22 that rotatably supports an inner end portion of the bending operation shaft 13 at an end 22 a protruding toward the bending operation mechanism side is fixed to the metal frame 18 with a small screw.
[0021]
The bending operation bearing member 22 protrudes largely from the metal frame 18 in a direction opposite to the bending operation mechanism side. The protruding portion is formed in a cylindrical shape having a cutout groove 22b on the lower side (that is, on the side closer to the insertion portion 1), and the incident end 9a of the light guide fiber bundle 9 is disposed inside the cylindrical portion. .
[0022]
A lid 25 made of an electrically insulating plastic is fitted into an opening formed on the side of the main body case 11 opposite to the side on which the bending operation lever 7 is arranged, and a sealing surface is fitted on the fitting surface. An O-ring 26 is mounted so that water does not enter the inside of the operation unit 2 through a gap between the fitting portions.
[0023]
The cylindrical portion of the bending operation bearing member 22 whose base is fixed to the metal frame 18 as described above is located at the center axis position of the through hole formed in the central portion of the lid 25. The light guide mounting tube 28 fixed to the bending operation bearing member 22 with screws is projected outward from the protruding end of the cylindrical portion of the bending operation bearing member 22.
[0024]
An incident end 9a of the light guide fiber bundle 9 is screwed and fixed at the center axis position of the light guide mounting tube 28. The light guide fiber bundle 9 is moved from the cutout groove 22b of the bending operation bearing member 22 to the operation portion. 2 and into the insertion portion 1. A convex meniscus lens 30 is water-tightly joined to the protruding end of the light guide mounting tube 28 so as to face the incident end face of the light guide fiber bundle 9.
[0025]
A unit receiving base 27 made of, for example, stainless steel for receiving (connecting) the illumination light supply unit 40 attached to and detached from the operation unit 2 protrudes outward from a through hole formed in the lid 25. And is fixed by being pressed inward by a metal fastening ring 38 which is screwed into the protruding end portion of the bending operation bearing member 22.
[0026]
However, a cylindrical insulating cylinder 29 made of electrically insulating plastic is interposed between the unit receiving base 27 and the fastening ring 38 so that the unit receiving base 27 and the fastening ring 38 do not come into contact with each other. Thereby, the unit receiving base 27 and the fastening ring 38 are electrically insulated.
[0027]
An O-ring for sealing is attached to a fitting portion between the members arranged inside the hole of the lid 25, and the operation unit 2 is a watertight in which water does not enter from outside in all parts. Structured.
[0028]
【The invention's effect】
According to the present invention, the input end of the light guide is operated by holding the incident end of the light guide at the opposite end of the bending operation bearing member that supports the rotation shaft of the bending operation mechanism at one end. It is possible to reduce the size and weight of the operation unit by minimizing the number of components and space for holding the operation unit.
[Brief description of the drawings]
FIG. 1 is an enlarged rear cross-sectional view of an operation unit in a state in which an illumination light supply unit according to an embodiment is removed.
FIG. 2 is a side view of the simplified endoscope apparatus according to the embodiment.
FIG. 3 is a rear view of the simplified endoscope apparatus according to the embodiment.
[Explanation of symbols]
2 Operation part 9 Light guide fiber bundle 9a Incident end part 13 Curved operation shaft 18 Metal frame 22 Curved operation bearing member

Claims (1)

A bending operation mechanism for bending a bendable bending portion formed in the insertion portion by remote operation and an incident end of a light guide for transmitting illumination light in an operation portion connected to a base end of the insertion portion. And a simple endoscope device in which an illumination light supply unit for supplying illumination light to the light guide is detachably attached to the operation unit.
At the opposite end of the bending operation bearing member which is fixed to the frame in the operation section and supports the rotating shaft of the bending operation mechanism at one end, the light guide faces the incident end of the light guide and the incident end face thereof. A simple endoscope device which holds an optical lens and holds a unit receptacle for connecting the illumination light supply unit so as to protrude outward .

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