公开(公告)号：EP3382464A1

公开(公告)日：2018-10-03

申请号：EP18161910.7

申请日：2018-03-15

申请人： CANON KABUSHIKI KAISHA

发明人： TAKAHASHI, Masafumi ,  TERADA, Ryohei ,  SADAMITSU, Yushi ,  SHIMOI, Yasuhiro ,  KOGA, Yutaka ,  SOETA, Yukihiro

IPC分类号： G03G15/09 ,  G03G15/08

CPC分类号： G03G15/167 ,  G03G15/0216 ,  G03G15/0806 ,  G03G15/0808 ,  G03G15/0812 ,  G03G15/0865 ,  G03G15/0898 ,  G03G15/0921 ,  G03G15/2053

摘要： A developing device (4) includes an accommodating casing (41), a rotatable developer carrying member (44), a regulating portion (42), a
magnetic flux generating portion (44a) including a first magnetic pole (S3) and a second magnetic pole (S1) which have the same polarity, and
a cover portion (48) provided downstream of the developing region and upstream of a maximum magnetic flux density position of the second
magnetic pole with respect to a rotational direction of the developer carrying member. The cover portion is disposed between the casing and the developer carrying member. A downstream end of the cover portion with respect to the rotational direction is in a side upstream, with respect to the rotational direction, of a minimum magnetic flux density position between the first magnetic pole and the second magnetic pole with respect to the rotational direction.

公开(公告)号：EP3396465A1

公开(公告)日：2018-10-31

申请号：EP18161909.9

申请日：2018-03-15

申请人： CANON KABUSHIKI KAISHA

发明人： TAKAHASHI, Masafumi ,  TERADA, Ryohei ,  SADAMITSU, Yushi ,  SHIMOI, Yasuhiro ,  KOGA, Yutaka ,  SOETA, Yukihiro

IPC分类号： G03G15/09 ,  G03G15/08

CPC分类号： G03G15/167 ,  G03G15/0216 ,  G03G15/0806 ,  G03G15/0808 ,  G03G15/0812 ,  G03G15/0865 ,  G03G15/0898 ,  G03G15/0921 ,  G03G15/2053

摘要： A developing device includes an accommodating casing, a rotatable developer carrying member, a regulating portion, a magnetic flux generating portion including a first magnetic pole and a second magnetic pole which have the same polarity, and a cover portion provided downstream of the developing region and upstream of a maximum magnetic flux density position of the second magnetic pole with respect to a rotational direction of the developer carrying member. The cover portion is disposed between the casing and the developer carrying member. A first opposing region between an inner surface of the casing and the developer carrying member is in a side downstream of the developing region and upstream of a second opposing region between the cover portion and the developer carrying member with respect to the rotational direction.