Insertion assist device for endoscope and endoscope system

1. An insertion assist device comprising:

a grip comprising a channel, the channel being configured to receive an insertion portion of an endoscope;

a lever configured to advance the insertion portion by moving distally relative to the grip, and the lever being configured to retreat the insertion portion by moving proximally relative to the grip;

a liquid container having a closed end, the container being provided on an interior of the grip and configured to store a liquid; and

a tubular sheath provided on an exterior of the insertion portion of the endoscope, the tubular sheath being connected to the liquid container at a first end of the tubular sheath, and configured to guide the liquid toward a second end of the tubular sheath, the second end being opposite to the first end;

wherein the grip includes a pair of open ends each formed along a longitudinal axis of the channel, and the pair of open ends are deformable between a closed state in which the pair of open ends are configured to prevent the endoscope from being inserted into or removed from the channel and an open state in which the pair of open ends are separated from each other to allow the endoscope to be inserted into or removed from the channel.

2. The insertion assist device according to claim 1 , wherein the second end of the tubular sheath includes an opening extending in a direction in which the insertion portion of the endoscope advances and retreats.

3. The insertion assist device according to claim 1 , wherein the tubular sheath is provided on the exterior of the insertion portion of the endoscope, and surrounds an outer peripheral surface of the insertion portion of the endoscope.

4. The insertion assist device according to claim 3 , wherein the lever abuts against an outer peripheral surface of the tubular sheath, and advances or retreats together with the insertion portion of the endoscope by generating a frictional force between the outer peripheral surface of the tubular sheath and the lever.

5. The insertion assist device according to claim 1 , wherein the pair of open ends abut against each other in the closed state.

6. The insertion assist device according to claim 1 , further comprising a rail provided at a distal side of the grip, the rail being connected to the grip and configured to guide the insertion portion of the endoscope.

7. The insertion assist device according to claim 6 , further comprising a second lever provided on the grip and configured to change a position of the rail.

8. The insertion assist device according to claim 7 , wherein:

the second lever includes a pin supported so as to be rotatable relative to a hole provided on the grip, and

the rail is configured to pivot around an axis of the pin.

9. The insertion assist device according to claim 1 , wherein the liquid is a drug solution for treatment.

10. The insertion assist device according to claim 1 , wherein at least a portion of the liquid container is formed of an elastic member.

11. The insertion assist device according to claim 10 , wherein:

the liquid container includes a protrusion protruding from a surface of the grip, and

the protrusion is formed of the elastic member.

12. The insertion assist device according to claim 10 , wherein:

the liquid container includes a hard portion formed of a material harder than the elastic member, and

the hard portion is disposed in the interior of the grip.

13. The insertion assist device according to claim 12 , further comprising:

an extraction port connected to the hard portion and configured to connect the tubular sheath and the liquid container; and

a valve provided at the extraction port and configured to seal the extraction port.

14. An endoscope system comprising:

the insertion assist device according to claim 1 ; and

the endoscope including the insertion portion inserted through the channel of the insertion assist device.

15. The endoscope system according to claim 14 , further comprising a suction device, wherein the tubular sheath is provided on the exterior of the insertion portion of the endoscope, the tubular sheath surrounding an outer periphery of the endoscope and is connected to the suction device.

16. The endoscope system according to claim 1 , wherein the liquid container being fixed in the grip relative to an entire range of motion of the lever.

17. An insertion assist device comprising:

a grip comprising a channel, the channel being configured to receive an insertion portion of an endoscope;

a lever configured to advance the insertion portion by moving distally relative to the grip, and the lever being configured to retreat the insertion portion by moving proximally relative to the grip;

a liquid container, the container being enclosed within an interior of the grip and configured to store a liquid; and

a tubular sheath provided on an exterior of the insertion portion of the endoscope, the tubular sheath being connected to the liquid container at a first end of the tubular sheath, and configured to guide the liquid toward a second end of the tubular sheath, the second end being opposite to the first end,

wherein the liquid container being fixed in the grip relative to an entire range of motion of the lever,

wherein the grip includes a pair of open ends each formed along a longitudinal axis of the channel, and the pair of open ends are deformable between a closed state in which the pair of open ends are configured to prevent the endoscope from being inserted into or removed from the channel and an open state in which the pair of open ends are separated from each other to allow the endoscope to be inserted into or removed from the channel.

18. The insertion assist device according to claim 17 , wherein at least a portion of the liquid container is formed of an elastic member,

wherein the liquid container includes a hard portion formed of a material harder than the elastic member, and

the hard portion is disposed in the interior of the grip.

19. The insertion assist device according to claim 17 , wherein at least a portion of the liquid container is formed of an elastic member,

wherein the liquid container includes a protrusion protruding from a surface of the grip, and

the protrusion is formed of the elastic member.