Grasping forceps for medical treatment

Grasping forceps for medical treatment which grips an object of interest in a body cavity of a subject, comprising:

• a sheath to be inserted into the body cavity and having an insertion bore therein;
• openable/closable gripping means provided on a distal end of the sheath, for gripping the object of interest in the body cavity, the gripping means being provided with an operation action end portion;
• a fixed operation handle provided at a proximal end portion of the sheath, said fixed operation handle having a bore therein;
• a movable operation handle rotatably coupled to the fixed operation handle and having an operation action end portion;
• an operation shaft inserted through the insertion bore and the bore of said fixed operation handle so as to be movable back and forth, the operation shaft having a distal end connected to the gripping means and a proximal end portion connected to the operation action end portion of the movable operation handle to allow the operation shaft to be moved back and forth by the rotation of the movable operation handle to close and open the gripping means;
• first stopper means for restricting an end-of-forward movement position of the operation shaft;
• second stopper means for restricting an end-of-backward movement position of the operation shaft;
• at least one of said first and second stopper means is received in said bore of said fixed operation handle;
• and
• means for adjustably varying an end-of-movement position of the operation shaft through at least one of the first and second stopper means;
• wherein the operation shaft has an abutting end, and the first stopper means has an end face against which the abutting end abuts in the end-of-forward movement position of the operation shaft;
• and
• wherein the fixed operation handle has a bore through which the operation shaft is inserted, and the first stopper means has a cylindrical member fitted into the bore of the fixed operation handle, said cylindrical member having said end face.

Grasping forceps for medical treatment which grips an object of interest in a body cavity of a subject, comprising:

• a sheath to be inserted into the body cavity and having an insertion bore therein;
• openable/closable gripping means provided on a distal end of the sheath, for gripping the object of interest in the body cavity, the gripping means being provided with an operation action end portion;
• a fixed operation handle provided at a proximal end portion of the sheath, said fixed operation handle having a bore therein;
• a movable operation handle rotatably coupled to the fixed operation handle and having an operation action end portion;
• an operation shaft inserted through the insertion bore and the bore of said fixed operation handle so as to be movable back and forth, the operation shaft having a distal end connected to the gripping means and a proximal end portion connected to the operation action end portion of the movable operation handle to allow the operation shaft to be moved back and forth by the rotation of the movable operation handle to close and open the gripping means;
• first stopper means for restricting an end-of-forward movement position of the operation shaft;
• second stopper means for restricting an end-of-backward movement position of the operation shaft;
• at least one of said first and second stopper means is received in said bore of said fixed operation handle;
• and
• means for adjustably varying an end-of-movement position of the operation shaft through at least one of the first and second stopper means;
• wherein the operation shaft has an abutting end, and the second stopper means has an end face against which the abutting end abuts in the end-of-forward movement position of the operation shaft;
• and
• wherein the fixed operation handle has a bore through which the operation shaft is inserted and a member threaded into the bore, and said end face is provided on said member and has its position varied in accordance with an extend to which the member is threaded into the bore.

Grasping forceps for medical treatment which grips an object of interest in a body cavity of a subject, comprising:

• a sheath to be inserted into the body cavity and having an insertion bore therein;
• openable/closable gripping means provided on a distal end of the sheath, for gripping the object of interest in the body cavity, the gripping means being provided with an operation action end portion;
• a fixed operation handle provided at a proximal end portion of the sheath, said fixed operation handle having a bore therein;
• a movable operation handle rotatably coupled to the fixed operation handle and having an operation action end portion;
• an operation shaft inserted through the insertion bore and the bore of said fixed operation handle so as to be movable back and forth, the operation shaft having a distal end connected to the gripping means and a proximal end portion connected to the operation action end portion of the movable operation handle to allow the operation shaft to be moved back and forth by the rotation of the movable operation handle to close and open the gripping means;
• first stopper means for restricting an end-of-forward movement position of the operation shaft;
• second stopper means for restricting an end-of-backward movement position of the operation shaft;
• at least one of said first and second stopper means is received in said bore of said fixed operation handle;
• means for adjustably varying an end-of-movement position of the operation shaft through at least one of the first and second stopper means;
• wherein the operation shaft has a shaft body and a rod attached to a rear end of the operation body and is connected to the operation action end portion of the movable operation handle via the rod;
• and
• adjusting means for adjustably varying a connection position of the rod to the shaft body and wherein the rod has a first abutting end for abutting against the first stopper means in an end-of-forward movement position of the operation shaft and a second abutting end for abutting against the second stopping means.

Grasping forceps for medical treatment which grips an object of interest in a body cavity of a subject, comprising:

• a sheath to be inserted into the body cavity and having an insertion bore therein;
• openable/closable gripping means provided on a distal end of the sheath, for gripping the object of interest in the body cavity, the gripping means being provided with an operation action end portion;
• a fixed operation handle provided at a proximal end portion of the sheath, said fixed operation handle having a bore therein;
• a movable operation handle rotatably coupled to the fixed operation handle and having an operation action end portion;
• an operation shaft inserted through the insertion bore and the bore of said fixed operation handle so as to be movable back and forth, the operation shaft having a distal end connected to the gripping means and a proximal end portion connected to the operation action end portion of the movable operation handle to allow the operation shaft to be moved back and forth by the rotation of the movable operation handle to close and open the gripping means;
• first stopper means for restricting an end-of-forward movement position of the operation shaft;
• second stopper means for restricting an end-of-backward movement position of the operation shaft;
• at least one of said first and second stopper means is received in said bore of said fixed operation handle;
• and
• means for adjustably varying an end-of-movement position of the operation shaft through at least one of the first and second stopper means;
• wherein the operation shaft has an abutting end, and the second stopper means has an end face against which the abutting end abuts in the end-of-forward movement position of the operation shaft;
• and
• wherein the second stopper means comprises varying means for varying a position of the second end face for determining and end-of-movement position of the operation shaft.