Electronic device

1. An electronic device comprising:

a rack;

a mount housing in which an electronic component is housed, and mounted in the rack from a front face side or rear face side of the rack; and

a movable duct configured to have a housed state where the movable duct is retracted from an opening formed in a sidewall part of the mount housing and is housed in the mount housing and an opened state where the movable duct is moved to outside of the mount housing through the opening so as to form a ventilation flue located outside the mount housing and communicating with the opening, wherein

the movable duct is arranged on one side in a front-rear direction of the sidewall part of the mount housing, and

the ventilation flue includes an inlet/outlet arranged outside the mount housing and facing in one of front and rear directions of the mount housing in the opened state.

2. The electronic device according to claim 1 , wherein the movable duct includes a rotary shaft extending in a height direction of the mount housing, and is changed between the housed state and the opened state with a rotation about the rotary shaft.

3. The electronic device according to claim 1 , wherein

the mount housing includes a fixing part which extends outward in a width direction of the mount housing from a middle part in the front-rear direction of the sidewall part, and

the movable duct in the opened state is arranged at least on one side in the front-rear direction of the mount housing with respect to the fixing part.

4. The electronic device according to claim 3 , wherein a plurality of the movable ducts are arranged on both sides in the front-rear direction of the mount housing across the fixing part and are arranged to face in opposite directions to each other.

5. The electronic device according to claim 3 , wherein the rack includes a fixed part arranged outside the mount housing in the width direction, the fixing part being fixed to the fixed part while being engaged with the fixed part in the front-rear direction of the rack.

6. The electronic device according to claim 1 , wherein

a wiring space is provided outside the mount housing in the width direction inside the rack, and

the movable duct in the opened state is arranged at least on one side in the front-rear direction of the rack with respect to the wiring space.

7. The electronic device according to claim 1 , further comprising:

a fan configured to generate cooling air flowing in the front-rear direction of the rack inside the rack.

8. The electronic device according to claim 7 , wherein the fan is arranged facing the inlet/outlet of the movable duct in the opened state in the front-rear direction of the mount housing.

9. The electronic device according to claim 1 , wherein the movable duct is arranged on each of both sides of the mount housing in the width direction.

10. The electronic device according to claim 7 , further comprising:

an electronic unit configured to include the electronic component and to be housed inside the mount housing from a housing opening formed on the front face side or rear face side of the mount housing,

wherein the movable duct is arranged in the electronic unit.

11. The electronic device according to claim 10 , wherein

the mount housing includes a backboard which is arranged such that a thickness direction of the backboard is aligned with the front-rear direction of the mount housing, and to which the electronic unit is to be connected, and

the movable duct in the opened state is positioned outside the backboard in a width direction of the mount housing.

12. The electronic device according to claim 10 , wherein

the mount housing includes a pair of an upper divider and a lower divider which face each other in a height direction of the mount housing, the electronic unit being housed between the upper divider and the lower divider, and

at least one of the upper divider and the lower divider is provided with a guide part configured to move the movable duct in the housed state to the outside of the mount housing from the opening so as to change the movable duct from the housed state to the opened state when the electronic unit is housed into the mount housing.

13. The electronic device according to claim 12 , wherein

the guide part is arranged diagonally to extend outward in the width direction of the mount housing while extending from the housing opening to a back-end side of the mount housing being opposite from the housing opening, and

the movable duct is provided with a slide part configured to be engaged with the guide part and to slide along the guide part when the electronic unit is housed into the mount housing.

14. The electronic device according to claim 12 , wherein

the mount housing includes

a first connector, and

a hook part configured to protrude toward the lower divider from the upper divider,

the electronic unit includes a second connector configured to be connected to the first connector in the front-rear direction of the mount housing, and

the movable duct includes

a contact part configured to come into contact with the hook part when the electronic unit is housed into the mount housing, and

a pressing part configured to catch the hook part, to press the hook part toward the housing opening, to move the electronic unit to a back-end side of the mount housing, and to connect the second connector to the first connector, when the movable duct with the contact part put in contact with the hook part is changed from the housed state to the opened state.

15. The electronic device according to claim 10 , wherein

the electronic unit includes

a printed circuit board which is arranged such that a thickness direction of the printed circuit board is aligned with a height direction of the mount housing, and on which the electronic component is to be mounted, and

a unit housing configured to house the printed circuit board, and

the movable duct in the housed state is housed inside the unit housing, and

the movable duct in the opened state protrudes to the outside of the mount housing through the opening from a vent hole formed in the sidewall part of the unit housing, and forms the ventilation flue located outside the mount housing and communicating with the vent hole.

16. The electronic device according to claim 15 , wherein the sidewall part of the unit housing is provided with an electromagnetic shield covering a part of the vent hole and having a plurality of ventilation holes.

17. The electronic device according to claim 16 , wherein

the sidewall part of the unit housing is provided with an upper slit and a lower slit extending along an upper end and a lower end of the electromagnetic shield, respectively, and

the movable duct is made of metal, and includes

a vertical wall part arranged outside the electromagnetic shield,

an upper wall part extending into the unit housing through the upper slit from an upper end of the vertical wall part,

a lower wall part extending into the unit housing through the lower slit from a lower end of the vertical wall part,

an upper conduction gasket being conductive, provided on the upper wall part inside the unit housing, and configured to come into contact with an inner surface of the electromagnetic shield in the opened state, and

a lower conduction gasket being conductive, provided on the lower wall part inside the unit housing, and configured to come into contact with the inner surface of the electromagnetic shield in the opened state.

18. The electronic device according to claim 1 , wherein the movable duct is arranged in the mount housing.

19. A rack mount apparatus comprising:

a mount housing in which an electronic component is housed, and mounted in a rack from a front face side or rear face side of the rack; and

a movable duct configured to have a housed state where the movable duct is retracted from an opening formed in a sidewall part of the mount housing and is housed in the mount housing and an opened state where the movable duct is moved to outside of the mount housing through the opening so as form a ventilation flue located outside the mount housing and communicating with the opening, wherein

the movable duct is arranged on one side in a front-rear direction of the sidewall part of the mount housing, and

the ventilation flue includes an inlet/outlet arranged outside the mount housing and facing in one of front and rear directions of the mount housing in the opened state.