Electronic device and a game controller

1. An electronic device comprising:

a casing having a display on its front face, ends of which being gripped by both hands of a user, said casing being comprised of a front face, a rear face and one or more side faces, the

side faces including a top side face, a bottom side face, a left side face and a right side face; and at least one button operation means provided on the side face of said casing; said button operation means further comprising:

an elongated button body, wherein said button body is operated by the user's forefinger or middle finger aligned with the longitudinal direction of said button body;

a deformation member being pressed by a back of said button body when said button body is pressed down, the back being a flip side of a face pressed by the user; and

switch contacts being electrically conducted due to the deformation of the deformation member; wherein

a first seizing means is provided on a side of the button body close to a center of the casing, said first seizing means extending as a flange in a longitudinal direction;

a second seizing means is provided on a side of the button body close to one of the left or right side faces of the casing, said second seizing means facing a section of the casing;

wherein there is a clearance between each of said first and second seizing means and the inner wall of casing so that each of said first and second seizing means may contact against an inner wall of the casing to pivot about the contact point or alternatively may be disengageable toward an inside of the casing;

when the side of the button body close to the side face of the casing is pressed, said first seizing means on the opposite side of the pressed side comes into contact with the inner wall of the casing to function as a pivot point, and said second seizing means on the pressed side disengages from the inner wall of the casing to pivot about the pivot point to the pressed direction;

wherein the first and second seizing means are separated in the longitudinal direction of said button body, said first seizing means being a planar member extending in a longitudinal direction from one end of said button body with a step from the pressed face, and said second seizing means being a vertical part formed in another end of said button body; and

wherein when said button body is not pressed, said step of the planar member is engaged with a corresponding receiving part extending from said casing and said vertical part comes into contact with the section of said casing.

2. The electronic device according to claim 1 , wherein

when a vicinity of center of said button body is pressed, both said first and second seizing means are disengaged from the inner wall of the casing and said button body moves downward.

3. The electronic device according to claim 1 , wherein

when any position of said button body is pressed, said deformation member is deformed in accordance with the pressed position to allow said switch contacts to be electrically conducted.

4. The electronic device according to claim 1 , said deformation member being made of a rubber.

5. The electronic device according to claim 1 , said button operation means being provided at a position where an operation by any one of a forefinger and a middle finger of the user is easy when said casing is gripped by the user.

6. The electronic device according to claim 5 , said button operation means being provided in a notch formed on the side face of said casing.

7. The electronic device according to claim 1 , wherein the surface of said first and second seizing means contacts against a limb of the opening of the casing so as to prevent the button body from being detached from the opening of the casing.

8. The electronic device according to claim 1 , when the side of the button body close to the center of the casing is pressed, said second seizing means on the opposite side of the pressed side comes into contact with the inner wall of the casing to function as a pivot point, said first seizing means on the pressed side disengages from the inner wall of the casing to pivot about the pivot point to the pressed direction.

9. A game controller comprising:

a casing, ends of which being gripped by both hands of a user, said casing being comprised of a front face, a rear face and one or more side faces, the side faces including a top side face, a bottom side face, a left side face and a right side face; and

at least one button operation means provided on the side face of said casing;

said button operation means further comprising:

an elongated button body wherein said button body is operated by the user's forefinger or middle finger aligned with the longitudinal direction of said button body;

a deformation member being pressed by a back of said button body when said button body is pressed down, the back being a flip side of a face pressed by the user; and

switch contacts being electrically conducted due to the deformation of the deformation member; wherein

a first seizing means is provided on a side of the button body close to a center of the casing, said first seizing means extending as a flange in a longitudinal direction;

a second seizing means is provided on a side of the button body close to one of the left or right side faces of the casing, said second seizing means facing a section of the casing;

wherein there is a clearance between each of said first and second seizing means and the inner wall of casing so that each of said first and second seizing means may contact against an inner wall of the casing to pivot about the contact point or alternatively may be disengageable toward an inside of the casing;

when the side of the button body close to the side face of the casing is pressed, said first seizing means on the opposite side of the pressed side comes into contact with the inner wall of the casing to function as a pivot point, and said second seizing means on the pressed side disengages from the inner wall of the casing to pivot about the pivot point to the pressed direction;

wherein the first and second seizing means are separated in the longitudinal direction of said button body, said first seizing means being a planar member extending in a longitudinal direction from one end of said button body with a step from the pressed face, and said second seizing means being a vertical part formed in another end of said button body; and

wherein when said button body is not pressed, said step of the planar member is engaged with a corresponding receiving part extending from said casing and said vertical part comes into contact with the section of said casing.

10. The game controller according to claim 9 , wherein

when a vicinity of a center of said button body is pressed, both said first and second seizing means are disengaged from the inner wall of the casing and said button body moves downward.

11. The game controller according to claim 9 , wherein

when any position of said button body is pressed, said deformation member is deformed in accordance with the pressed position to allow said switch contacts to be electrically conducted.

12. The game controller according to claim 9 , said deformation member being made of a rubber.

13. The game controller according to claim 9 , said button operation means being provided at a position where an operation by any one of a forefinger and a middle finger of the user is easy when said casing is gripped by the user.

14. The game controller according to claim 13 , said button operation means being provided in a notch formed on the side face of said casing.

15. The electronic device according to claim 9 , when the side of the button body close to the center of the casing is pressed, said second seizing means on the opposite side of the pressed side comes into contact with the inner wall of the casing to function as a pivot point, said first seizing means on the pressed side disengages from the inner wall of the casing to pivot about the pivot point to the pressed direction.