Foam discharge device

1. A foam discharging device, including:

a storage portion that stores a liquid agent;

a foamer mechanism that changes the liquid agent into foam to generate a foam body; and

a discharging portion that discharges the foam body, wherein the discharging portion includes:

a foam passing chamber that allows the foam body to pass;

a plate portion; and

an ejection-port forming wall portion that:

extends downward below the foam passing chamber;

has a planar shape formed into a closed-loop shape, the planar shape including two planes extending perpendicularly from the plate portion, the planes being flat, and the planes being substantially parallel to one another;

has an inner space communicating with the foam passing chamber; and

has a lower end having an ejection port formed thereon,

a bottom end portion of at least part of the ejection-port forming wall portion is formed into a shape that has a thickness reduced toward the lower end,

the ejection-port forming wall portion includes a first portion and a second portion,

a height position of a lower edge of the first portion is higher than a height position of a lower edge of the second portion,

the lower edge of the second portion is longer than the thickness of the lower edge of the second portion, and

the height position of the lower edge of the second portion is constant along the entire lower edge of the second portion.

2. The foam discharging device according to claim 1 , wherein

the second portion includes a portion that is formed into a flat plate shape that is vertically erected, and

a lower edge of this flat-plate shaped portion extends horizontally.

3. The foam discharging device according to claim 1 , wherein

the discharging portion includes a plurality of the ejection-port forming wall portions, and

the plurality of ejection-port forming wall portions include a wall portion that forms the first portion, and a wall portion that forms the second portion.

4. The foam discharging device according to claim 1 , wherein

the lower edge of the first portion is formed such that a recessed portion and a protruding portion of an uneven shape are alternately formed in a circumferential direction.

5. The foam discharging device according to claim 1 , wherein

the plate portion defines a lower end of the foam passing chamber, and

the discharging portion includes:

a foam discharging unit including:

a plurality of the ejection-port forming wall portions that extend downward from a lower surface of the plate portion; and

a holding portion that detachably holds the foam discharging unit.

6. The foam discharging device according to claim 1 , further comprising:

a liquid-agent supplying actuator that supplies the liquid agent from the storage portion to the foamer mechanism;

a gas supplying actuator that supplies gas to the foamer mechanism; and

a controller that operates and controls the gas supplying actuator and the liquid-agent supplying actuator, wherein

the liquid agent and the gas are supplied to the foamer mechanism under the control of the controller to generate the foam body.

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

a foam pump mechanism configured to include the foamer mechanism to generate the foam body with a pushing-down operation.

8. The foam discharging device according to claim 1 , further comprising the liquid agent with which the storage portion is filled.

9. A foam discharging unit that is attached to a foam discharging device including: a storage portion that stores a liquid agent; and a foamer mechanism that changes the liquid agent into foam to generate a foam body, the foam discharging unit discharging the foam body, wherein

the foam discharging unit includes:

a plate portion; and

an ejection-port forming wall portion that:

protrudes from a one-side surface of the plate portion in a direction perpendicular to a plate surface of the plate portion; is

includes two planes extending in the direction and formed into a closed-loop shape when viewed from the protruding direction, the planes being flat and the planes being substantially parallel to one another;

has an inner space communicating with a space of the plate portion on a side of an other-side surface of the plate portion; and

has a tip end having an ejection port formed thereon,

a tip end portion of at least part of the ejection-port forming wall portion is formed into a shape that has a thickness reduced toward a tip end,

the ejection-port forming wall portion includes a first portion and a second portion,

a distance at the first portion from the plate portion to a tip end edge thereof is shorter than a distance at the second portion from the plate portion to a tip end edge thereof,

the tip end edge of the second portion is longer than the thickness of the tip end edge of the second portion, and

the distance at the second portion from the plate portion to the tip end edge thereof is constant along the entire tip end edge thereof.

10. The foam discharging device according to claim 1 , wherein the bottom end portion of the at least part of the ejection-port forming wall portion that is formed into the shape that has the thickness reduced toward the lower end reduces in thickness from an outer wall to an inner wall of the at least part of the ejection-port forming wall portion.

11. The foam discharging device according to claim 1 , wherein the foamer mechanism includes a mesh to change the liquid agent into foam to generate the foam body.

12. The foam discharging device according to claim 1 , wherein a boundary between the first portion and the second portion is a stepped portion in which the height position of the lower edge changes in a step shape.