Forceps device

1 . A forceps device comprising:

a grasping part;

a support that holds the grasping part;

a first rotating shaft that turnably supports the support;

a base member that holds the first rotating shaft;

a plurality of grasping-portion wires that transmit driving forces to move the grasping part;

a support wire that transmits a driving force to turn the support about the first rotating shaft; and

a turning restricting mechanism that restricts turning of the support so that the support that is turned does not touch the plurality of grasping-portion wires.

2 . The forceps device according to claim 1 , wherein the turning restricting mechanism includes a stopper having a first face with which part of the support that is turned comes into contact.

3 . The forceps device according to claim 2 , wherein the stopper is a block member having a flat face that faces the support, the flat face serving as the first face.

4 . The forceps device according to claim 3 , wherein:

the support has an outer edge at which a flat contact face is formed, the flat contact face being inclined with respect to a central axis of the base member at a neutral position at which the support is not turned to left or right, the support coming into contact with the stopper when a turning angle from the neutral position becomes a contact angle β beyond angles α in a control range angle, and

wherein α<β.

5 . The forceps device according to claim 4 , wherein the contact angle β is 70° or larger.

6 . The forceps device according to claim 2 , wherein:

the support has an outer edge at which a flat contact face is formed, the flat contact face being inclined with respect to a central axis of the base member at a neutral position at which the support is not turned to left or right, the support coming into contact with the stopper when a turning angle from the neutral position becomes a contact angle β beyond angles α in a control range angle, and

wherein α<β.

7 . The forceps device according to claim 6 , wherein the contact angle β is 70° or larger.

8 . The forceps device according to claim 2 , wherein the stopper is positioned relative to the base member.

9 . The forceps device according to claim 2 , wherein the stopper is located in a region surrounded by the support wire and the plurality of grasping-portion wires.

10 . The forceps device according to claim 2 , wherein:

the base member includes a pair of arms that hold respective ends of the first rotating shaft, and

the pair of arms holds a positioning pin extending through the stopper.

11 . The base member according to claim 10 , wherein:

the base member includes a partition part at a base part of the pair of arms,

the partition part has a plurality of projections for positioning of the stopper, and

the plurality of projections are configured to position the stopper in a direction intersecting a central axis of the base member.

12 . A forceps device comprising:

a grasping part;

a support that holds the grasping part;

a first rotating shaft that turnably supports the support;

a base member that holds the first rotating shaft;

a plurality of grasping-portion wires that transmit driving forces to move the grasping part;

a plurality of support wires that transmit a driving force to turn the support about the first rotating shaft; and

a stopper that prevents the support from touching the plurality of grasping-portion wires.

13 . The forceps device according to claim 12 , wherein the stopper is a block having a flat face that faces the support and with which part of the support comes into contact.

14 . The forceps device according to claim 13 , wherein:

the support has an outer edge at which a flat contact face is formed, the flat contact face being inclined with respect to a central axis of the base member at a neutral position at which the support is not turned to left or right, and

the support comes into contact with the stopper when a turning angle from the neutral position becomes a contact angle β.

15 . The forceps device according to claim 14 , wherein the contact angle β is 70° or larger.

16 . The forceps device according to claim 12 , wherein:

the support has an outer edge at which a flat contact face is formed, the flat contact face being inclined with respect to a central axis of the base member at a neutral position at which the support is not turned to left or right,

the support comes into contact with the stopper when a turning angle from the neutral position becomes a contact angle β, and

the contact angle β is 70° or larger.

17 . The forceps device according to claim 12 , wherein the stopper is located in a region surrounded by the plurality of grasping-portion wires and the plurality of support wires.

18 . The forceps device according to claim 12 , wherein:

the base member includes a pair of arms that hold respective ends of the first rotating shaft, and

the pair of arms holds a positioning pin extending through the stopper.

19 . The base member according to claim 18 , wherein:

the base member includes a partition part at a base part of the pair of arms,

the partition part has a plurality of projections for positioning of the stopper, and

the plurality of projections are configured to position the stopper in a direction intersecting a central axis of the base member.

20 . A forceps device comprising:

a plurality of grasping portions;

a support that holds the plurality of grasping portions;

a first rotating shaft that turnably supports the support;

a base member that holds the first rotating shaft;

a plurality of first wires that transmit driving forces to move the plurality of grasping portions;

a plurality of second wires that transmit a driving force to turn the support about the first rotating shaft; and

a stopper that prevents the support from touching the plurality of first wires.