Endoscope
AssigneeHoya Corporation
InventorToshiyuki Katayama
Life of this patent
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Abstract
Provided is an endoscope capable of suppressing the displacement of a movable optical frame due to bending of a bending portion. An endoscope according this embodiment includes an insertion portion that includes a distal end portion, a bending portion, and a soft portion in order from the distal end side, a movable optical frame that is built in the distal end portion and capable of advancing and retreating in an axial length direction of the insertion portion, an operation coil that is connected to the movable optical frame and capable of advancing and retreating in the axial length direction of the insertion portion, and a protection coil through which the operation coil is inserted and which penetrates at least the bending portion.
Claims12
An endoscope, comprising:
- an insertion portion that includes a distal end portion, a bending portion, and a soft portion in order from the distal end side;
- a movable optical frame that is built in the distal end portion and capable of advancing and retreating in an axial length direction of the insertion portion;
- an elastic operation coil that is connected to the movable optical frame via a slider connected to a distal end of a wire and capable of advancing and retreating in the axial length direction of the insertion portion, wherein:
- when the operation coil is pulled and retreated by an operation of an operation lever, a force with which the movable optical frame advances is less than a force with which the movable optical frame retreats when the operation coil advances, and
- within the soft portion, a proximal end of the wire is inserted into and fixed to the operation coil;
- and
- a protection coil through which the operation coil is inserted and which penetrates at least the bending portion.
Dependencies are inferred from the claim text.