Cleaning head and cleaning tool

1. A cleaning head onto which a cleaning sheet for wiping a surface to be cleaned is attached and which is movable on the surface to be cleaned in a predetermined direction for wiping the surface to be cleaned, the cleaning head comprising:

a first member having a side facing the surface to be cleaned;

a second member abutting on at least a portion of the first member on a side of the first member opposite the side facing the surface to be cleaned; and

a case body that contains the first member and the second member therein, the case body covering the first member and the second member from an upper side, wherein the case body comprises a stick connection unit and a sheet fixing unit on the upper side,

wherein the first member is disposed in the case body between the surface to be cleaned and the second member,

wherein the second member is more rigid than the first member,

wherein the second member has a protrusion part provided at a position upstream of an edge of a part of the second member that abuts on the first member in a moving direction of the cleaning head, the protrusion part protruding in a direction toward the first member beyond the edge of the part of the second member that abuts on the first member,

wherein a surface of the first member on the side facing the surface to be cleaned has a planar shape, and

wherein the first member has a recess part, in which the protrusion part of the second member is received, at a position upstream of an edge of a part of the first member on which the second member abuts in the moving direction of the cleaning head.

2. The cleaning head according to claim 1 , wherein the cleaning head is movable to and fro in a first direction and in a second direction opposite to the first direction on the surface to be cleaned for wiping the surface to be cleaned,

wherein a part of the second member protrudes in the direction toward the first member beyond both edges of the part of the second member that abuts on the first member to form the protrusion part between the both edges in a to-and-fro moving direction, and

wherein the recess part is provided between the both edges in the to-and-fro moving direction.

3. The cleaning head according to claim 2 , wherein the cleaning head is movable in a direction substantially the same as a shorter direction which is substantially perpendicular to a longer direction of the cleaning head for wiping the surface to be cleaned,

wherein the protrusion part is provided between both edges of the part of the second member that abuts on the first member in the shorter direction, and

wherein the recess part is provided between the both edges in the shorter direction.

4. The cleaning head according to claim 3 , wherein the cleaning head is further movable in a direction substantially the same as the longer direction for wiping the surface to be cleaned,

wherein the protrusion part is provided between both edges of the part of the second member that abuts on the first member in the longer direction, and

wherein the recess part is provided between the both edges in the longer direction.

5. The cleaning head according to claim 4 , wherein the first member is detachably attached to the second member.

6. The cleaning head according to claim 4 , wherein a length by which the protrusion part protrudes is adjustable.

7. The cleaning head according to claim 3 , wherein a length by which the protrusion part protrudes is adjustable.

8. The cleaning head according to claim 3 , wherein the first member is detachably attached to the second member.

9. The cleaning head according to claim 2 , wherein the first member is detachably attached to the second member.

10. The cleaning head according to claim 2 , wherein a length by which the protrusion part protrudes is adjustable.

11. The cleaning head according to claim 1 , wherein the cleaning head is movable in a direction substantially the same as a shorter direction which is substantially perpendicular to a longer direction of the cleaning head for wiping the surface to be cleaned,

wherein the protrusion part is provided between both edges of the part of the second member that abuts on the first member in the shorter direction, and

wherein the recess part is provided between the both edges in the shorter direction.

12. The cleaning head according to claim 11 , wherein the cleaning head is further movable in a direction substantially the same as the longer direction for wiping the surface to be cleaned,

wherein the protrusion part is provided between both edges of the part of the second member that abuts on the first member in the longer direction, and

wherein the recess part is provided between the both edges in the longer direction.

13. The cleaning head according to claim 12 , wherein the first member is detachably attached to the second member.

14. The cleaning head according to claim 12 , wherein a length by which the protrusion part protrudes is adjustable.

15. The cleaning head according to claim 11 , wherein the first member is detachably attached to the second member.

16. The cleaning head according to claim 11 , wherein a length by which the protrusion part protrudes is adjustable.

17. The cleaning head according to claim 1 , wherein the first member is detachably attached to the second member.

18. The cleaning head according to claim 17 , wherein a length by which the protrusion part protrudes is adjustable.

19. The cleaning head according to claim 1 , wherein a length by which the protrusion part protrudes is adjustable.

20. A cleaning tool comprising:

the cleaning head according to claim 1 ; and

a stick connected to the cleaning head on a side of the cleaning head opposite to a side of the cleaning head facing the surface to be cleaned.