Endoscope apparatus

1. An endoscope apparatus comprising:

an insertion part which has an imaging mechanism at a distal end portion and which is bendable and elongated;

a display part which displays an image acquired by the imaging mechanism;

a manipulating part which has a swinging body and which performs curving manipulation of the insertion part; and

a housing provided with the display part and the manipulating part at a front face thereof, and to which the insertion part is connected at a back face opposite to the front face;

wherein the housing includes an upper portion provided with the display part, and a lower portion provided with the manipulating part and having the insertion part connected thereto;

wherein a back face of the lower portion of the housing includes (i) a first finger grip portion which extends from a position above the insertion part toward a proximal end portion of the insertion part, such that the first finger grip portion extends rearward and downward from the position above the insertion part, and (ii) a second finger grip portion which extends from a position below the insertion part toward the proximal end portion of the insertion part such that the second finger grip portion extends rearward and upward from the position below the insertion part;

wherein the first finger grip portion, which is provided above the proximal end portion of the insertion part, includes a first finger grip and a second finger grip;

wherein the second finger grip is provided between the first finger grip and the proximal end portion of the insertion part, such that the second finger grip is provided below the first finger grip in a vertical direction, and the proximal end portion of the insertion part is provided below the second finger grip in the vertical direction;

wherein the second finger grip portion has a first holding face and a second holding face that respectively incline toward right and left ends of the housing in a right-and-left direction of the housing; and

wherein the housing is configured to be held such that (i) a thumb of one hand of a user is positioned at a distal end portion of the swinging body, (ii) first and second other fingers of the one hand of the user are arranged respectively at the first finger grip and the second finger grip of the first finger grip portion, (iii) third and fourth other fingers of the one hand of the user are arranged at the second finger grip portion, and (iv) the thumb and the other fingers face each other.

2. The endoscope apparatus according to claim 1 , wherein friction members are arranged at the first holding face and the second holding face, and frictional coefficients of the first holding face and the second holding face are higher than that of other portions of the housing.

3. The endoscope apparatus according to claim 2 , wherein the friction members are elastically deformable.

4. The endoscope apparatus according to claim 1 , wherein the second finger grip portion is longer than the first finger grip portion in a dimension of the housing in a vertical direction.

5. The endoscope apparatus according to claim 1 , wherein the first holding face and the second holding face are symmetrically arranged across a center of the housing in the right-and-left direction.

6. The endoscope apparatus according to claim 1 , wherein the proximal end portion of the insertion part and the swinging body are concentrically arranged in a neutral state of the swinging body.

7. The endoscope apparatus according to claim 1 , wherein in the manipulating part the swinging body and a manipulating member are connected,

wherein the endoscope apparatus further comprises a mechanical curving mechanism which curves the insertion part by manipulating the swinging body to advance or retreat the manipulating member.

8. The endoscope apparatus according to claim 1 , wherein in a part of the lower portion where the first holding face and the second holding face are provided, a cross-sectional area that is parallel to the right-and-left direction of the housing and orthogonal to a vertical direction of the housing becomes gradually smaller toward a lower end of the housing.

9. The endoscope apparatus according to claim 1 , wherein the first finger grip portion comprises:

a first extending section that extends rearward and downward toward the proximal end portion of the insertion part from a position of the back face of the housing where the upper portion of the housing meets the lower portion of the housing; and

a second extending section that extends rearward and downward toward the proximal end portion of the insertion part from a distal end of the first extending section;

wherein the first finger grip is provided at the first extending section, and the second finger grip is provided at the second extending section.

10. The endoscope apparatus according to claim 9 , wherein the first extending section is linear and provides an upwardly facing surface; and

wherein the second extending portion is curved.