Developing device

A developing device comprising:

• a rotatable developer carrying member configured to carry a developer comprising toner and a carrier for developing an electrostatic latent image formed on an image bearing member;
• a regulating blade made of a resin material and provided opposed to said rotatable developer carrying member in non-contact with said rotatable developer carrying member, said regulating blade being configured to regulate an amount of the developer carried on said rotatable developer carrying member and including a base portion and a regulating portion which is provided at a position thereof closest to said regulating blade and which is configured to regulate the amount of the developer carried on said rotatable developer carrying member;
• and
• a developing device frame provided separately from said regulating blade and including a mounting portion configured to mount said regulating blade,
• wherein said regulating blade includes a first rib and a second rib which project from said base portion and which are supported by said mounting portion, said first rib and said second rib extending along a rotational axis direction of said developer carrying member over a substantially entire region of said base portion corresponding to a maximum image region of said image bearing member in which an image is capable of forming,
• wherein when said developing device is seen in a cross section perpendicular to a rotational axis of said developer carrying member,
• said first rib and said second rib are provided at a predetermined gap therebetween in a direction from a position where said regulating blade is closest to said developer carrying member toward a rotation center of said developer carrying member, and
• said first rib has a first surface-to-be-supported by said mounting portion, and said second rib has a second surface-to-be-supported by said mounting portion, each of said first surface-to-be-supported and said second surface-to-be-supported having a width of 3.0 mm or less, and
• wherein in a state that both of said first surface-to-be-supported and said second surface-to-be-supported are supported by said mounting portion, said regulating blade is fixed to said mounting portion in a region of said regulating blade corresponding to the maximum image region of said image bearing member.

A developing device comprising:

• a rotatable developer carrying member configured to carry a developer comprising toner and a carrier for developing an electrostatic latent image formed on an image bearing member;
• a regulating blade made of a resin material and provided opposed to said rotatable developer carrying member in non-contact with said rotatable developer carrying member, said regulating blade being configured to regulate an amount of the developer carried on said rotatable developer carrying member;
• and
• a developing device frame provided separately from said regulating blade and including a mounting portion configured to mount said regulating blade,
• wherein said regulating blade is fixed to said mounting portion with an adhesive in a region thereof corresponding to a maximum image region of the image bearing member in which an image is capable of forming,
• wherein when said developing device is seen in the cross section perpendicular to the rotational axis of said developer carrying member, a predetermined space for storing the adhesive is formed between said mounting portion and said regulating blade, and
• wherein the predetermined space is formed in a region of said mounting portion corresponding to the maximum image region of the image bearing member.

A developing device comprising:

• a rotatable developer carrying member configured to carry a developer comprising toner and a carrier for developing an electrostatic latent image formed on an image bearing member;
• a regulating blade made of a resin material and provided opposed to said rotatable developer carrying member in non-contact with said rotatable developer carrying member, said regulating blade being configured to regulate an amount of the developer carried on said rotatable developer carrying member;
• and
• a developing device frame provided separately from said regulating blade and including a mounting portion configured to mount said regulating blade,
• wherein said regulating blade is fixed to said mounting portion with an adhesive in a region thereof corresponding to a maximum image region of the image bearing member in which an image is capable of forming,
• wherein when said developing device is seen in the cross section perpendicular to the rotational axis of said developer carrying member, a predetermined space for storing the adhesive is formed between said mounting portion and said regulating blade, and
• wherein the predetermined space is formed in a region of said regulating blade corresponding to the maximum image region of the image bearing member.