Process cartridge and electrophotographic image forming apparatus

• US 6,011,941 A
• Filed: 02/17/1998
• Issued: 01/04/2000
• Est. Priority Date: 02/14/1997
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Takashima, Kazunori, Yukimachi, Hiroshi, Matsuzaki, Hiroomi, Tsuda, Tadayuki
• Primary Examiner(s): Braun, Fred L.
• Application Number:
  US09/024,193
• Time in Patent Office: 686 Days
• Field of Search: 399/90, 399/111, 399/115, 399/116, 399/119, 399/25
• US Class Current: 399/111
• CPC Class Codes: G03G 21/1885 position of the memory; memory housings; electrodes
• CPC Class Codes: G03G 2221/166 Electrical connectors
• CPC Class Codes: G03G 2221/1823 Cartridges having electronically readable memory

Abstract

A process cartridge which is detachably mountable to a main assembly of an image forming apparatus includes an electrophotographic photosensitive member, a process device actable on the photosensitive member, a memory element, and a cartridge connector for electrically connecting the memory with the main assembly when the process cartridge is mounted to the main assembly. The cartridge connector is electrically connectable with a main assembly connector provided in the main assembly. The cartridge also includes a contact portion for moving a shutter for protecting the main assembly connector from a protecting position to a retracted position in response to mounting of the process cartridge to the main assembly.

Claims

1. A process cartridge which is detachably mountable to a main assembly of an image forming apparatus, said process cartridge comprising:

an electrophotographic photosensitive member;

process means actable on said photosensitive member;

memory means;

a cartridge connector for electrically connecting said memory means with the main assembly when said process cartridge is mounted to the main assembly, wherein said cartridge connector is electrically connectable with a main assembly connector provided in the main assembly; and

a contact portion for moving a shutter for protecting the main assembly connector from a protecting position to a retracted position in response to mounting of said process cartridge to the main assembly.

2. A process cartridge according to claim 1, wherein said contact portion is provided on a guiding member for guiding said process cartridge into the main assembly.

3. A process cartridge according to claim 2, wherein said cartridge connector extends substantially parallel with said guiding member.

4. A process cartridge according to claim 1, wherein said process cartridge connector is fixed to said process cartridge.

5. A process cartridge according to claim 1 or 4, wherein said cartridge connector is fixed to an end of said process cartridge in a direction of mounting thereof to the main assembly, and wherein said cartridge connector is provided on an end in a direction crossing a direction of mounting of said process cartridge to said main assembly.

6. A process cartridge according to claim 5, wherein said process cartridge comprises at least one of charging means, developing means and cleaning means as said the process means, and said photosensitive member, and wherein said the process cartridge is detachably mountable to the main assembly as a unit.

7. A process cartridge which is detachably mountable to a main assembly of an image forming apparatus, said process cartridge comprising:

an electrophotographic photosensitive member;

a charging member for charging said photosensitive member and a developing member for developing a latent image formed on said photosensitive member;

memory means;

a cartridge connector for electrically connecting said memory means with the main assembly when said process cartridge is mounted to the main assembly, wherein said cartridge connector is electrically connectable with a main assembly connector provided in the main assembly; and

a contact portion for moving a shutter for protecting the main assembly connector from a protecting position to a retracted position in response to mounting of said process cartridge to the main assembly.

8. A process cartridge which is detachably mountable to a main assembly of an image forming apparatus, said process cartridge comprising:

an electrophotographic photosensitive member;

a process unit configured and positioned to act on said electrophotographic photosensitive member, wherein said process unit comprises at least one of a charging element, a developing element, and a cleaning element;

a memory element;

a cartridge connector configured and positioned to electrically connect said memory element with the main assembly when the process cartridge is mounted to the main assembly, wherein said cartridge connector is electrically connectable with a main assembly connector provided in the main assembly; and

a contact portion configured and positioned to move a shutter for protecting the main assembly connector from a protecting position to a retracted position in response to mounting of the process cartridge to the main assembly,

wherein said contact portion is provided on a guiding member configured and positioned to guide the process cartridge into the main assembly,

wherein said cartridge connector extends substantially parallel with the guiding member,

wherein said cartridge connector is fixed to said process cartridge, and

wherein said process cartridge is detachably mountable to the main assembly as a unit.

9. A process cartridge according to claim 8, wherein said cartridge connector is fixed to an end of said process cartridge in a direction of mounting thereof to the main assembly, and wherein said cartridge connector is provided on an end in a direction crossing a direction of mounting of said process cartridge to the main assembly.

10. An image forming apparatus for forming an image on a recording material, to which apparatus a process cartridge is detachably mountable, said apparatus comprising:

(a) a main assembly connector;

(b) a shutter for protecting said main assembly connector, said shutter being movable between a protecting position and a retracted position retracted from the protecting position; and

(c) mounting means for detachably mounting said process cartridge, which includes;

an electrophotographic photosensitive member;

process means actable on said photosensitive member;

memory means;

a cartridge connector for electrically connecting said memory means with a main assembly when said process cartridge is mounted to the main assembly, wherein said cartridge is electrically connectable with a main assembly connector provided in the main assembly; and

a contact portion for moving a shutter for protecting the main assembly connector, from a protecting position to a retracted position in response to mounting of said process cartridge to the main assembly.

11. An apparatus according to claim 10, wherein said shutter extends such that it bridges two guiding portions of said process cartridge when said process cartridge is mounted to the main assembly.

12. An apparatus according to claim 11, wherein said shutter comprises an electroconductive member and a non-electroconductive member.

13. An apparatus according to claim 12, wherein said non-electroconductive member is rotatable about an axis and functions to prevent damage of said memory element by static electricity.

14. An apparatus according to claim 10, wherein said main assembly connector is rotatable to follow said process cartridge.

15. An image forming apparatus, for forming an image on a recording material, said apparatus comprising:

(a) a main assembly connector;

(b) a shutter for protecting said main assembly connector, said shutter being movable between a protecting position and a retracted position retracted from the protecting position; and

(c) a mounting portion positioned and configured to detachably mount a process cartridge including;

an electrophotographic photosensitive member;

a process unit configured and positioned to act on the electrophotographic photosensitive member, wherein the process unit comprises at least one of a charging element, a developing element, and a cleaning element;

a memory element;

a cartridge connector configured and positioned to electrically connect the memory element with the main assembly when the process cartridge is mounted to the main assembly, wherein the cartridge connector is electrically connectable with said main assembly connector; and

a contact portion configured and positioned to move said shutter from the protecting position to the retracted position in response to mounting of the process cartridge to said mounting portion,

wherein the contact portion is provided on a guiding member configured and positioned to guide the process cartridge into a main assembly of said image forming apparatus,

wherein the cartridge connector extends substantially parallel with the guiding member,

wherein the cartridge connector is fixed to the process cartridge, and

wherein the process cartridge is detachably mountable to said mounting portion as a unit.

16. An image forming apparatus according to claim 15, wherein said shutter extends such that it bridges two guiding portions of the process cartridge when the process cartridge is mounted to said mounting portion.

17. An image forming apparatus according to claim 15, wherein said shutter comprises an electroconductive member and a non-electroconductive member.

18. An image forming apparatus according to claim 17, wherein said non-electroconductive member is rotatable about an axis and functions to prevent damage to said memory element by static electricity.

19. An image forming apparatus according to claim 17, wherein said main assembly connector is rotatable to follow the process cartridge.