Cleaning member for image forming apparatus, charging device, unit for image forming apparatus, process cartridge, and image forming apparatus

1. A cleaning member for an image forming apparatus comprising:

a core member;

a foamed elastic layer comprising two or more strip-shaped foamed elastic members (i) that are connected together at one or both of longitudinal end portions and (ii) that are spirally wound around the outer peripheral surface of the core member from one end of the core member to the other end thereof, wherein a space is defined between the two or more strip-shaped foamed elastic members; and

two or more adhesive layers with the space defined therebetween, wherein the two or more adhesive layers bond the two or more strip-shaped foamed elastic members to the core member.

2. The cleaning member for an image forming apparatus according to claim 1 ,

wherein the area of a region that comes into contact with the outer peripheral surface of the core member via the adhesive layer in the surface that faces the outer peripheral surface of the core member in a corner portion that faces toward an axial central portion of the core member or a corner portion that protrudes outward in the spiral direction of the foamed elastic layer, at an end where the two or more strip-shaped foamed elastic members that become the foamed elastic layer are connected to each other, is approximately equal to or more than 40% in a contact area ratio per unit area.

3. The cleaning member for an image forming apparatus according to claim 1 ,

wherein compression processing is performed in the thickness direction of the foamed elastic layer on a corner portion that faces toward an axial central portion of the core member or a corner portion that protrudes outward in the spiral direction of the foamed elastic layer, at an end where the two or more strip-shaped foamed elastic members that become the foamed elastic layer are connected to each other.

4. The cleaning member for an image forming apparatus according to claim 1 ,

wherein the width of a connecting portion where the two or more strip-shaped foamed elastic members that become the foamed elastic layer are connected to each other is approximately equal to or more than twice a void diameter of the strip-shaped foamed elastic members.

5. A charging device comprising:

a charging member that charges a member to be charged; and

a cleaning member that is arranged in contact with the surface of the charging member and cleans the surface of the charging member and is used for an image forming apparatus according to claim 1 .

6. A process cartridge attached to and detached from an image forming apparatus, comprising at least:

the charging device according to claim 5 .

7. An image forming apparatus comprising:

an image holding member;

a charging unit that charges the surface of the image holding member and includes the charging device according to claim 5 ;

a latent image forming unit that forms a latent image on the surface of the charged image holding member;

a developing unit that develops the latent image formed on the image holding member with toner to form a toner image; and

a transfer unit that transfers the toner image to a member to be transferred.

8. A unit for an image forming apparatus comprising:

a member to be cleaned; and

a cleaning member that is arranged in contact with the surface of the member to be cleaned and cleans the surface of the member to be cleaned and is used for an image forming apparatus according to claim 1 .

9. A process cartridge attached to and detached from an image forming apparatus, comprising at least:

the unit for an image forming apparatus according to claim 8 .

10. An image forming apparatus comprising:

the unit for an image forming apparatus according to claim 8 .