Surgical device retracting mechanism

1 . A surgical device retracting mechanism comprising:

a holder configured to hold a surgical device;

a guiding member configured to guide the holder to linearly advance and retract;

a locking member configured to lock the holder in a locking state in which the surgical device is inserted in a surgical site; and

a retracting device configured to release the locking state of the locking member and retract the holder in accordance with a signal from outside the retracting device, wherein

the retracting device includes:

a first force generating member that generates a first force in a retracting direction of the holder in the locking state in which the holder is locked;

a second force generating member that generates a second force for releasing the locking state of the locking member; and

a third force generating member that maintains the locking state of the locking member against the second force,

the locking member is a turnable member that is turnable about a fulcrum, and

the turnable member has a first end that contacts with the holder and a second end on which the third force acts in the locking state.

2 . The surgical device retracting mechanism according to claim 1 , wherein:

the second force generating member is a compression spring, and

the third force generating member is a pull-type solenoid for pulling the second end of the turnable member while power supply to the pull-type solenoid is on.

3 . The surgical device retracting mechanism according to claim 2 , wherein:

the compression spring of the retracting device has a spring constant such that the locking state of the locking member is released while power supply to the pull-type solenoid is off.

4 . The surgical device retracting mechanism according to claim 1 , wherein the first force generating member is a tension spring.

5 . The surgical device retracting mechanism according to claim 1 , wherein the surgical device held by the holder is an endoscope configured to be inserted into an eyeball of a patient.

6 . The surgical device retracting mechanism according to claim 1 , further comprising:

a sensor that detects a movement of an eyeball or a movement of a head and outputs the signal,

wherein the retracting device is configured to release the locking state of the locking member in accordance with the signal in response to the movement of the eyeball or the movement of the head detected by the sensor.

7 . A surgical device retracting mechanism comprising:

a holder configured to hold a surgical device;

a guide that guides the holder to linearly advance and retract;

a locking member configured to lock the holder in a locked state in which the surgical device is inserted in a surgical site; and

a retracting device configured to release the locked state and retract the holder based on a detection signal,

wherein the retracting device includes:

a tension spring that generates a first force in a retracting direction of the holder in the locked state;

a compression spring that generates a second force for releasing the locked state; and

a solenoid that maintains the locked state against the second force.

8 . The surgical device retracting mechanism according to claim 7 , wherein:

the locking member comprises a rod that is rotatable about a fulcrum, and

a first end of the rod contacts the holder in the locked state; and

the third force acts on a second end of the rod in the locked state.

9 . The surgical device retracting mechanism according to claim 8 , wherein the solenoid pulls the second end of the rod while power is supplied to the solenoid.

10 . The surgical device retracting mechanism according to claim 9 , wherein:

a spring constant of the compression spring is such that the locked state is released while power is not supplied to the solenoid.

11 . The surgical device retracting mechanism according to claim 7 , wherein the surgical device comprises an endoscope and the surgical site comprises an eyeball of a patient.

12 . The surgical device retracting mechanism according to claim 7 , further comprising:

a sensor that detects a movement of an eyeball and/or a movement of a head and outputs the detection signal when movement of the eyeball and/or movement of the head is detected.

13 . A surgical apparatus comprising:

a holder configured to hold a surgical device;

a linear guide that guides the holder;

a tension spring having a first end attached to an end of the holder and a second end attached to an end of the linear guide;

a rod configured to rotate about a fulcrum, the rod having a first end that contacts the holder and a second end that is biased by a solenoid to lock the holder in a locked state in which the surgical device does not move along the linear guide when the surgical device is inserted in a surgical site;

a compression spring attached to the second end of the rod and providing a force opposite to a bias force generated by the solenoid,

wherein, based on a detection signal, the solenoid releases the second end to release the locked state such that the holder moves to retract the surgical device from the surgical site along the linear guide.

14 . The surgical apparatus according to claim 13 , wherein the solenoid pulls the second end of the rod while power is supplied to the solenoid.

15 . The surgical apparatus according to claim 13 , wherein the solenoid releases the second end of the rod while power is not supplied to the solenoid.

16 . The surgical apparatus according to claim 13 , wherein the surgical device comprises an endoscope and the surgical site comprises an eyeball of a patient.

17 . The surgical apparatus according to claim 16 , further comprising:

a sensor that detects a movement of the eyeball and/or a movement of a head of the patient and outputs the detection signal when movement of the eyeball and/or movement of the head is detected.