JPH0742403Y2 - Operation part of the endoscope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an operating section of an endoscope used for observing the inside of a human body cavity or the like.

[Conventional technology]

In the operation section of the endoscope, a metal frame is generally fixed in the operation section body forming the outer wall. In the past, the operation section body was also made of a metal material, and the frame was fixed to the operation section body with screws.

However, in recent years, due to demands for weight reduction and cost reduction, the operation section body has come to be formed of synthetic resin. Therefore, if the frame is directly fixed to the operation portion main body with screws, the portion where the screw hole is formed in the synthetic resin cannot withstand the load and is damaged.

Therefore, conventionally, the frame is fixed by screws to the metal base of the eyepiece that is fastened and fixed to the main body of the operating portion by a large nut (Japanese Patent Laid-Open No. 62-97524).

[Problems to be solved by the device]

However, since a TV camera or the like is attached to the eyepiece, if there is a leakage current in the TV camera, in the operation unit where the frame is fixed to the eyepiece, the leakage current flows from the eyepiece to the frame of the operation unit. Is transmitted.

Then, in most cases, the frame is electrically connected to the tip of the insertion portion of the endoscope, so that the leakage current of the television camera reaches the tip of the insertion portion through the frame and the patient undergoing the endoscopic examination receives the leakage current. There was a risk of electric shock.

This invention eliminates such conventional drawbacks, and in an endoscope in which a metal frame is fixed inside a synthetic resin operation part body, leakage current to the eyepiece is not transmitted to the frame, It is an object of the present invention to provide a highly safe operation part of an endoscope.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the operation part of the endoscope of the present invention has an operation part main body forming an outer wall of the operation part connected to the proximal end side of the insertion part, the operation part body being formed of an electrically insulating material. In the operation section of the endoscope in which a metal frame is fixed, a bending operation device for remotely bending the bendable bending section formed at the distal end of the insertion section is rotatably attached to the operation section main body. It is characterized in that the frame is fixed to the bearing.

[Action]

The metal frame fixed to the bearing of the bending operation device,
It can be provided electrically completely separated from the eyepiece of the endoscope.

〔Example〕

 Embodiments will be described with reference to the drawings.

FIG. 4 shows the overall configuration of the endoscope. A flexible insertion portion 1 has a bendable bending portion 2 formed at the tip thereof, and a tip having an objective optical system incorporated therein. The part main bodies 3 are connected.

An operation portion 4 is connected to the proximal end side of the insertion portion 1, and the operation portion 4 is provided with a bending operation device for remotely bending the bending portion 2. Reference numerals 5 and 6 denote an operation section main body and an operation section cover forming an outer wall of the operation section 4, and a bending operation lever 7 for performing a bending operation is rotatably supported on the front side of the operation section main body 5. Has been done.

An eyepiece 8 is provided on the head of the operation section body 5 so as to project therefrom. Further, a flexible connecting pipe 9 in which a light guide fiber for illumination is inserted is connected to the back side of the operation section body 5, and a connector 10 connected to the light source device is connected to the tip of the connecting pipe 9. There is.

FIG. 1 shows the operation unit main body 5 portion. The operation section body 5 is made of an electrically insulating material such as a synthetic resin mold. Reference numeral 11 is a base of the eyepiece, which is vertically fixed to the head of the operation portion main body 5 by a fixing nut 12. 13 is an O-ring for sealing.

Reference numeral 21 denotes a bending operation shaft having a protruding end portion connected to the bending operation lever 7, which is rotatably fitted in the bearing 22. 23 is a decorative cover. 24 is a fixing screw. 25 and 26 are O-rings for sealing.

The bearing 22 is made of metal such as brass, and is fixed to the operation portion body 5 by tightening the nut 27 from the inside. An angle member 28 made of an iron plate is sandwiched between the nut 27 and the operation section body 5 and fixed to the bearing 22.

A frame 30 made of, for example, an iron plate arranged in the operation portion 4 is fixed to the angle member 28 with screws 31.

That is, the frame 30 is fixed to the bearing 22 via the angle member 28, and these are separated from the base 11 of the eyepiece and the fixing nut 12 thereof, and are electrically separated from the eyepiece 8. There is. 32 is a reinforcing plate.

An auxiliary bearing 33 is fixed to the frame 30 with screws, and the end of the connecting pipe 9 is attached to the other end of the reinforcing bearing 33 (not shown).

The bending operation shaft 21 has operation blades as shown in FIG.
34 are connected so as to rotate integrally, and a pair of bending operation wires 35 are connected near both ends of the operation blade 34. Therefore, when the bending operation lever 7 is rotated, the bending operation wire 35 is driven via the bending operation shaft 21 and the operation blades 34, and the bending portion 2 can be bent.

The inner end of the bending operation shaft 21 is rotatably fitted in the auxiliary bearing 33. 36 is a stopper for restricting the rotation range of the operation blade 34.

Between the operating section cover 6 and the operating section main body 5, a sealing O
The ring 38 is interposed.

FIG. 3 shows the lower portion of the operation portion 4, and the lower end portion of the frame 30 is fixed by screws to the connection body 40 to which the base end cap 41 of the insertion portion 1 is connected and fixed. 42 is the operation unit cover 6
A fixing nut for fixing the to the connection body 40. 43 is a rubber break.

[Effect of device]

According to the operation section of the endoscope of the present invention, since the frame of the operation section is fixed to the bearing of the bending operation device, the frame can be completely electrically separated from the eyepiece section. Therefore, when attaching a TV camera etc. to the eyepiece,
The leakage current will not be transmitted to the insertion portion, and the risk of electric shock to the patient can be eliminated.

[Brief description of drawings]

1 is a partial sectional view of the embodiment, FIG. 2 is a partial front view of the embodiment, FIG. 3 is a partial sectional view of the embodiment, and FIG. 4 is a perspective view of the entire endoscope. 1 ... insertion part, 2 ... curved part, 4 ... operating part, 5 ... operating part body, 22 ... bearing, 28 ... angle member, 30 ... frame.

Claims (1)

[Scope of utility model registration request] 1. An operating portion main body forming an outer wall of an operating portion connected to a proximal end side of an insertion portion is formed of an electrically insulating material, and a metal frame is fixedly mounted in the operating portion main body. In the operation portion of the endoscope in which the eyepiece is projected from the operation portion main body, the bending operation device for remotely bending the bendable bending portion formed at the distal end of the insertion portion is provided in the operation portion main body. Is rotatably supported by a shaft, the frame is fixed to the bearing in a state of being electrically separated from the eyepiece, and the end of the rotary shaft of the bending operation device supported by the bearing on the operation part body side. An operating section for an endoscope, wherein an auxiliary bearing for rotatably supporting the section is attached to the frame.