Patent ID: 8401425

Claim:
A charging member, comprising: a support; an elastic layer; and a surface layer, wherein the surface layer comprises a polymer having an Si—O—Sr bond and having a structural unit represented by the following formula (1) and a structural unit represented by the following formula (2): in the formula (1), R 1 and R 2 each independently represent any one of the following formulae (3) to (6): in the formulae (3) to (6): R 3 to R 7 , R 10 to R 14 , R 19 , R 20 , R 25 , and R 26 each independently represent hydrogen, an alkyl group having 1 to 4 carbon atoms, a hydroxyl group, a carboxyl group, or an amino group; R 8 , R 9 , R 15 to R 18 , R 23 , R 24 , and R 29 to R 32 each independently represent hydrogen or an alkyl group having 1 to 4 carbon atoms; R 21 , R 22 , R 27 , and R 28 each independently represent hydrogen, an alkoxy group having 1 to 4 carbon atoms, or an alkyl group having 1 to 4 carbon atoms; n, m, l, q, s, and t each independently represent an integer of from 1 to 8; p and r each independently represent an integer of from 4 to 12; x and y each independently represent 0 or 1; and a symbol “*” and a symbol “**” represent bonding positions to a silicon atom and an oxygen atom in the formula (1), respectively.