IP Library › Granted Patent US 12690861

Granted Patent B2

US 12690861 · App. 18/363,303 · Granted Jul 28, 2026

Clip unit, clip delivery device, and clip release method

Inventors: Shoichiro Kawayoke (Hino, JP); Yoshimi Kuroda (Funabashi, JP)

Assignee: OLYMPUS MEDICAL SYSTEMS CORP.

A61B17/0487 A61B2017/0488

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Quick Facts

Patent No.: US 12690861
App. No.: 18/363,303
Granted: Jul 28, 2026
Kind: B2

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Abstract

A clip unit for a treatment tool is disclosed herein. The clip unit comprising a first arm that includes a first rotation portion, the first arm rotating around the first rotation portion as a center of rotation. The clip unit further comprising a second arm that includes a second rotation portion that is connected to the first rotation portion, the second arm rotating around the second rotation portion as a center of rotation. The first rotation portion and the second rotation portion are configured to lock a relative rotation of the first arm and the second arm.

Claims (49)

1 . A clip system, comprising:

a tubular applicator;

a first arm including a first rotation portion, the first arm rotating around the first rotation portion as a center of rotation;

a second arm including a second rotation portion connected to the first rotation portion, the second arm rotating around the second rotation portion as a second center of rotation; and

a connector, the connector including:

a first connecting portion connected to the first arm and the second arm; and

a second connecting portion configured to connect to the tubular applicator;

wherein:

the first rotation portion includes an engaged portion;

the second rotation portion includes an engaging portion configured to slide relative to the first rotation portion as the second arm rotates;

when the clip unit is pulled relative to the tubular applicator to which the clip unit is connectable, the first rotation portion and the second rotation portion are configured to lock a relative rotation of the first arm and the second arm by engagement between the engaging portion and the engaged portion;

the first connecting portion is disposed between the first arm and the second arm in a direction intersecting at least one of an opening or closing direction of the first arm and the second arm;

the engaged portion includes a notch provided on a side surface of the first rotation portion;

the engaging portion includes an elastic protrusion provided on the second rotation portion and protruding toward the first rotation portion; and

the elastic protrusion is biased in a direction toward the side surface of the first rotation portion.

2 . The clip unit according to claim 1 , further comprising:

a biasing portion configured to bias the first arm and the second arm in an opening direction in which a distal end portion of the first arm and a distal end portion of the second arm are separated from each other.

3 . The clip unit according to claim 1 , wherein the connector further comprises:

a separating portion separably connecting the first connecting portion and the second connecting portion.

4 . The clip unit according to claim 1 , further comprising:

a connecting pin connecting the first rotation portion and the second rotation portion.

5 . The clip unit according to claim 1 , wherein at least one of the first arm and the second arm has a stopper protruding in a width direction perpendicular to a longitudinal axis direction, and wherein, when the clip unit is pulled relative to the tubular applicator to which the clip unit is connectable, with the stopper being in contact with the tubular applicator, the first rotation portion and the second rotation portion are configured to lock a relative rotation of the first arm and the second arm by engagement between the engaging portion and the engaged portion.

6 . The clip unit according to claim 1 , wherein the first arm and the second arm rotate by being accommodated in the applicator, and wherein the first rotation portion and the second rotation portion are configured to lock relative rotation of the first arm and the second arm in a state where the first rotation portion and the second rotation portion are accommodated in the applicator.

7 . The clip unit according to claim 1 , wherein:

the first arm and the second arm are configured to be relatively rotatable in a closed state; and

the first arm and the second arm are configured to lock relative rotation when the first arm and the second arm are elastically deformed in the closed state.

8 . A clip device, comprising:

an applicator including a sheath extending in a longitudinal direction and a wire passing through the sheath; and

a clip unit including:

a first arm provided at a distal end of the wire, the first arm having a first rotation portion and rotating around the first rotation portion as a center of rotation; and

a second arm provided with a second rotation portion connected to the first rotation portion and rotating around the second rotation portion as a second center of rotation, wherein:

the first rotation portion includes an engaged portion;

the engaged portion is a notch provided on a side surface of the first rotation portion;

the second rotation portion includes an engaging portion configured to slide relative to the first rotation portion as the second arm rotates;

the engaging portion is an elastic protrusion provided on the second rotation portion and protruding toward the first rotation portion;

the elastic protrusion is biased in a direction toward the side surface of the first rotation portion; and

when the clip unit is pulled relative to the applicator, the first rotation portion and the second rotation portion are configured to lock a relative rotation of the first arm and the second arm by engagement between the engaging portion and the engaged portion.

9 . The clip device according to claim 8 , wherein a distal end of the wire includes a hook portion, wherein the first arm further includes a first through-hole provided in a center of the first rotation portion and through which the hook portion is inserted, and a first groove formed from a periphery to the first through-hole, wherein the second arm further includes a second through-hole provided in a center of the second rotation portion and through which the hook portion is inserted, and a second groove formed from a periphery to the second through-hole, and wherein in a closed state, the first rotation portion and the second rotation portion lock the rotation of the first arm and the second arm, and the hook portion passes through the first groove and the second groove to separate the applicator and the clip unit.

10 . The clip device according to claim 8 , further comprising:

a biasing portion biasing the first arm and the second arm in an opening direction in which a distal end portion of the first arm and a distal end portion of the second arm are separated from each other.

11 . The clip device according to claim 8 , wherein at least one of the first arm and the second arm protrudes in a width direction perpendicular to the longitudinal direction and has a locking portion locking at a distal opening edge of the sheath.

12 . The clip device according to claim 8 , further comprising:

a connection member including:

a first connecting portion connected to the applicator;

a second connecting portion connected to the first arm and the second arm; and

a separating portion separably connecting the first connecting portion and the second connecting portion.

13 . The clip device according to claim 8 , further comprising:

a connecting pin connecting the first rotation portion and the second rotation portion.

14 . The clip device according to claim 8 , wherein the first arm and the second arm rotate by being accommodated in the applicator, and wherein the first rotation portion and the second rotation portion are configured to lock relative rotation of the first arm and the second arm in a state where the first rotation portion and the second rotation portion are accommodated in the applicator.