Observation assisting forceps

Claim 2

Observation assisting forceps for assisting the observation with an endoscope provided with an observing means and an insertion part insertable into a body cavity comprising: a hollow sheath; a shaft-shaped member inserted through said sheath for extension therethrough into a maximum extended position and retraction therein into a maximum retracted position; an operating part formed on the rear end side of said shaft-shaped member and having a shaft-shaped member moving means formed therein; an observation assisting piece consisting of a plurality of linear members fitted in rear end bases to the front end side of said shaft-shaped member and given such characteristic as of expanding on the tip sides and substantially spherical parts formed at the tips of said respective linear members; and a fixing means in said moving means for fixing said shaft-shaped member at selected positions intermediate said maximum extended position and said maximum retracted position in said hollow sheath.

Claim 3

Observation assisting forceps according to claim 1 wherein said plurality of linear members are given a characteristic of expanding in the same plane on the tip side.

Claim 4

Observation assisting forceps according to claim 1 wherein said plurality of linear members are given a characteristic of expanding in the courses to the tip parts and the tip parts are parallel with one another.

Claim 5

Observation assisting forceps according to claim 1 wherein said plurality of linear members are given a characteristic of three-dimensionally expanding to form a conical surface or polygonal conical surface.

Claim 6

Observation assisting forceps for assisting the observation with an endoscope provided with an observing means and an insertion part insertable into a body cavity comprising: a hollow sheath; a shaft-shaped member inserted through said sheath for extension therethrough into a maximum extended position and retraction therein into a maximum retracted position; an operating part formed on the rear end side of said shaft-shaped member and having a shaft-shaped member moving means formed therein; an observation assisting piece consisting of a plurality of linear members fitted in the rear end bases to the front end side of said shaft-shaped member and given such characteristic as of expanding on the tip sides and substantially spherical parts formed at the tips of said respective linear members; and a fixing means in said moving means for fixing said shaft-shaped member at selected positions intermediate said maximum extended position and said maximum retracted position in said hollow sheath, said moving means including a ratchet mechanism for fixing said shaft-shaped member in said selected positions.

Claim 7

Observation assisting forceps for assisting the observation with an endoscope provided with an observing means and an insertion part insertable into a body cavity comprising: a hollow sheath; a shaft-shaped member inserted through said sheath for extension therethrough into a maximum extended position and retraction therein into a maximum retracted position; an operating part formed on the rear end side of said shaft-shaped member and having a shaft-shaped member moving means formed therein; an observation assisting piece consisting of a plurality of linear members fitted in the rear end bases to the front end side of said shaft-shaped member and given such characteristic as of expanding on the tip sides and substantially spherical parts formed at the tips of said respective linear members; and a fixing means in said moving means for fixing said shaft-shaped member at selected positions intermediate said maximum extended position and said maximum retracted position in said hollow sheath, said moving means including a ratchet mechanism for fixing said shaft-shaped member in said selected positions.

Claim 8

Observation assisting forceps according to claim 1 wherein said sheath is of such inside diameter as can contain said plurality of linear members as bundled.