Anchor device

1 . An anchor device configured to connect a plurality of tissues to each other, comprising:

an inner shaft having a longitudinal axis;

a first outer member and a second outer member which are separated from each other and which are each mounted on an outer peripheral surface of the inner shaft; and

a first anchor part and a second anchor part which are formed in the first outer member and the second outer member, respectively,

wherein the first anchor part includes a plurality of elongated anchor arms that are allowed to be expanded, from a contracted state, so as to separate in a direction away from the longitudinal axis of the first outer member and pivot in a direction away from the second anchor part so as to be in an expanded state, and wherein in the expanded state, distal ends of the plurality of the elongated anchor arms of the first anchor part are spaced apart from one another in a circumferential direction of the inner shaft,

wherein the second anchor part includes a plurality of elongated anchor arms that are allowed to be expanded, from a contracted state, so as to separate in a direction away from the longitudinal axis of the second outer member and pivot in a direction away from the first anchor part so as to be in an expanded state, and wherein in the expanded state, distal ends of the plurality of the elongated anchor arms of the second anchor part are spaced apart from one another in the circumferential direction of the inner shaft,

wherein the first outer member and the second outer member are longitudinally fixed at opposite ends of the inner shaft, respectively, in the contracted state and the expanded state of the plurality of elongated anchor arms of each of the first anchor part and the second anchor part, and

wherein the plurality of the elongated anchor arms of the first anchor part move to a position at which an angle that each of the plurality of elongated anchor arms of the first anchor part forms with respect to the longitudinal axis of the inner shaft is more than 90° when external pressure is applied to the elongated anchor arms of the first anchor part in a direction extending along the longitudinal axis of the inner shaft from the second anchor part to the first anchor part, or wherein the plurality of the elongated anchor arms of the second anchor part move to a position at which an angle that each of the plurality of elongated anchor arms of the second anchor part forms with respect to the longitudinal axis of the inner shaft is more than 90° when external pressure is applied to the elongated anchor arms of the second anchor part in a direction extending along the longitudinal axis of the inner shaft from the first anchor part to the second anchor part.

2 . The anchor device according to claim 1 , wherein, in the expanded state and in a state in which no external pressure is applied, each of the plurality of elongated anchor arms of the first anchor part and the plurality of elongated anchor arms of the second anchor part forms an angle θ of 75° at maximum with respect to the longitudinal axis of the inner shaft.

3 . The anchor device according to claim 1 , wherein the plurality of elongated anchor arms of the first anchor part and the plurality of elongated anchor arms of the second anchor part are continuous parts of the first outer member and the second outer member, respectively.

4 . The anchor device according to claim 1 , wherein the plurality of elongated anchor arms of the first anchor part and the plurality of elongated anchor arms of the second anchor part are each movable into the contracted state so as to form an angle of from 0° to 10° with respect to the longitudinal axis of the inner shaft.

5 . The anchor device according to claim 1 , wherein the anchor device is self-expandable.

6 . The anchor device according to claim 1 , wherein the first outer member and the second outer member are outer shafts.

7 . The anchor device according to claim 1 , wherein a plurality of the first anchor parts and a plurality of the second anchor parts are formed.

8 . The anchor device according to claim 1 , wherein in the expanded state, the distal ends of the plurality of elongated anchor arms of the first anchor part and the distal ends of the plurality of elongated anchor arms of the second anchor part are arranged to contact the plurality of tissues so that the plurality of tissues between the first anchor part and the second anchor part are caused to adhere to each other.

9 . The anchor device according to claim 1 , wherein the plurality of elongated anchor arms of the first anchor part are formed by cutting portions of the first outer member such that proximal ends of the elongated anchor arms remain continuous with the first outer member,

wherein the plurality of elongated anchor arms of the second anchor part are formed by cutting portions of the second outer member such that proximal ends of the elongated anchor arms remain continuous with the second outer member.

10 . The anchor device according to claim 1 , wherein the position at which the angle that each of the plurality of elongated anchor arms of the first anchor part forms with respect to the longitudinal axis of the inner shaft is more than 90° is a position at which the angle that each of the plurality of elongated anchor arms of the first anchor part forms with respect to the longitudinal axis of the inner shaft is 150° to 180°, or

wherein the position at which the angle that each of the plurality of elongated anchor arms of the second anchor part forms with respect to the longitudinal axis of the inner shaft is more than 90° is a position at which the angle that each of the plurality of elongated anchor arms of the second anchor part forms with respect to the longitudinal axis of the inner shaft is 150° to 180°.