Cartridge, mounting method for coupling member, and disassembling method for coupling member

• US 8,433,219 B2
• Filed: 06/17/2009
• Issued: 04/30/2013
• Est. Priority Date: 06/20/2008
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Miyabe, Shigeo, Ueno, Takahito, Takasaka, Atsushi
• Primary Examiner(s): Lindsay, Jr., Walter L
• Assistant Examiner(s): BONNETTE, RODNEY ANDREW
• Application Number:
  US12/486,199
• Publication Number:
  US 20090317135A1
• Time in Patent Office: 1,413 Days
• Field of Search: 399/119, 399/110, 399/111
• US Class Current: 399/119
• CPC Class Codes: G03G 15/08 using a solid developer, e.g. powder developer
• CPC Class Codes: G03G 15/0806 on a donor element, e.g. belt, roller complete developer unit G03G15/0896
• CPC Class Codes: G03G 21/1647 Mechanical connection means
• CPC Class Codes: G03G 21/1814 Details of parts of process cartridge, e.g. for charging, transfer, cleaning, developing G03G21/1835 takes precedence
• CPC Class Codes: G03G 21/186 Axial couplings

Abstract

A cartridge includes a coupling member for receiving a rotational force for rotating a developing roller. A cylindrical member movably supports one end portion of the coupling member inside of the cylindrical member. A cylindrical member side force receiving portion is provided inside the cylindrical member, with the cylindrical member side force receiving portion receiving the rotational force received by the coupling member. A first regulating portion is provided inside of the cylindrical member for preventing one end portion of the coupling member from disengaging in an axial direction of the cylindrical member. The first regulating portion is deformable outwardly in a radial direction of the cylindrical member so as to allow the one end portion of the coupling member to disengage in the axial direction of the cylindrical member.

Claims

1. A cartridge comprising:

a developing roller rotatable about an axis thereof;

a coupling member for receiving a rotational force for rotating said developing roller;

a cylindrical member movably supporting one end portion of said coupling member inside of said cylindrical member;

a cylindrical member side force receiving portion, provided inside said cylindrical member, for receiving the rotational force received by said coupling member;

a first regulating portion, provided inside of said cylindrical member, for preventing one end portion of said coupling member from disengaging in an axial direction of said cylindrical member, wherein said first regulating portion is deformable outwardly in a radial direction of said cylindrical member to allow said one end portion of said coupling member to disengage in the axial direction of said cylindrical member; and

a second regulating portion for regulating deformation of said first regulating portion outward of said cylindrical member in the radial direction in a state in which one end portion of said coupling member is mounted to the inside of said cylindrical member.

2. A cartridge according to claim 1, wherein said first regulating portion is provided at each of a plurality of positions along a circumferential direction of said cylindrical member with intervals in the circumferential direction.

3. A cartridge according to claim 2, wherein said coupling member is inclinable with respect to said cylindrical member so that the axis of said coupling member is inclinable with respect to the axis of said cylindrical member.

4. A cartridge according to claim 1 or 2, wherein a gap is provided between said first regulating portion and an inner surface of said cylindrical member, and said second regulating portion enters at least a part of the gap to regulate deformation of said first regulating portion outward of said cylindrical member in the radial direction.

5. A cartridge according to claim 4, wherein said coupling member is inclinable with respect to said cylindrical member so that the axis of said coupling member is inclinable with respect to the axis of said cylindrical member.

6. A cartridge according to claim 4, wherein said cylindrical member, said cylindrical member side force receiving portion and said first regulating portion (i) are made of resin material and (ii) are integrally molded.

7. A cartridge according to claim 6, wherein said coupling member is inclinable with respect to said cylindrical member so that the axis of said coupling member is inclinable with respect to the axis of said cylindrical member.

8. A cartridge according to claim 6, wherein said one end portion of said coupling member is a spherical portion, and said first regulating portion includes a projected portion projecting inwardly of said cylindrical member in the radial direction to prevent said spherical portion from disengaging from said cylindrical member in the axial direction of said cylindrical member, thus preventing said coupling member from disengaging from said cylindrical member.

9. A cartridge according to claim 8, wherein said coupling member is inclinable with respect to said cylindrical member so that the axis of said coupling member is inclinable with respect to the axis of said cylindrical member.

10. A cartridge according to claim 8, further comprising a bearing member supporting a developing roller shaft portion of said developing roller at one longitudinal end portion of said developing roller, and a side cover covering said cylindrical member so as to permit rotation of said cylindrical member in a state of being connected with said bearing member,

wherein said side cover includes said second regulating portion.

11. A cartridge according to claim 10, wherein said coupling member is inclinable with respect to said cylindrical member so that the axis of said coupling member is inclinable with respect to the axis of said cylindrical member.

12. A cartridge according to claim 10, wherein said side cover is provided with an elastic member, and said coupling member is inclined by an elastic force of said elastic member.

13. A cartridge according to claim 12, wherein said coupling member is inclinable with respect to said cylindrical member so that the axis of said coupling member is inclinable with respect to the axis of said cylindrical member.

14. A cartridge according to claim 1, further comprising a gear, provided on an outer periphery of said cylindrical member, for transmitting the rotational force received by said cylindrical member side force receiving portion to said developing roller.

15. A cartridge according to claim 1, wherein said coupling member is inclinable with respect to said cylindrical member so that the axis of said coupling member is inclinable with respect to the axis of said cylindrical member.

16. A cartridge comprising:

a developing roller rotatable about an axis thereof;

a developer supplying roller for supplying developer to said developing roller;

a coupling member for receiving a rotational force for rotating said developing roller and said developer supplying roller;

a cylindrical member of resin material movably supporting one end portion of said coupling member inside of said cylindrical member;

a cylindrical member side force receiving portion of resin material, provided inside said cylindrical member, for receiving the rotational force from said coupling member;

a first gear, provided on outer periphery of said cylindrical member, for transmitting the rotational force received by said cylindrical member side force receiving portion to said developing roller;

a second gear, provided on an outer periphery of said cylindrical member, for transmitting the rotational force received by said cylindrical member side force receiving portion to said developer supplying roller;

a first regulating portion, provided inside of said cylindrical member, for preventing one end portion of said coupling member from disengaging in an axial direction of said cylindrical member, wherein said first regulating portion is deformable outwardly in a radial direction of said cylindrical member to allow said one end portion of said coupling member to disengage in the axial direction of said cylindrical member, wherein said first regulating portion is provided at each of a plurality of positions along a circumferential direction of said cylindrical member with intervals in the circumferential direction;

a first bearing member supporting a developing roller shaft portion of said developing roller at one longitudinal end portion of said developing roller and supporting a developer supplying roller shaft portion of said developer supplying roller at one longitudinal end portion of said developer supplying roller;

a second bearing member supporting a developing roller shaft portion of said developing roller at the other longitudinal end portion of said developing roller and supporting a developer supplying roller shaft portion of said developer supplying roller at the other longitudinal end portion of said developer supplying roller; and

a side cover covering said cylindrical member so as to permit rotation of said cylindrical member in a state of being connected with said bearing member,

wherein said side cover includes a second regulating portion, and said second regulating portion enters at least one gap between the inner surface of said cylindrical member and said first regulating portion so as to regulate deformation of said first regulating portion outward of said cylindrical member in the radial direction in a state in which one end portion of said coupling member is mounted to the inside of said cylindrical member.

17. A cartridge according to claim 16, wherein said coupling member is inclinable with respect to said cylindrical member so that the axis of said coupling member is inclinable with respect to the axis of said cylindrical member.

18. A mounting method for mounting a coupling member to a cartridge frame usable with a cartridge, said cartridge including a developing roller rotatable about an axis thereof, wherein said coupling member is effective to receive a rotational force for rotating said developing roller, said method comprising:

a coupling member mounting step of mounting one end portion of said coupling member to an inside of said cylindrical member while deforming a first regulating portion of resin material outwardly in a radial direction of said cylindrical member, wherein said first regulating portion is provided at each of a plurality of positions along a circumferential direction of said cylindrical member with intervals in the circumferential direction;

a side cover mounting step of mounting said side cover to said cartridge frame wherein said cylindrical member, to which said one end portion of said coupling member is mounted by said coupling member mounting step, is interposed between said side cover and a bearing member supporting developing roller shaft portion of said developing roller at one longitudinal end portion of said developing roller, and wherein, in a state in which the other end portion of said coupling member is projected through an opening of said side cover and in which a second regulating portion of said side cover is inserted into at least one gap between an inner surface of said cylindrical member and said first regulating portion to regulate deformation of said first regulating portion outward of said cylindrical member in the radial direction.

19. A method according to claim 18, wherein in said side cover mounting step, said side cover is mounted to said cartridge frame by a screw in a state in which said coupling member is abutted to an inclination regulating portion by an elastic force of an elastic member.

20. A dismounting method for dismounting a coupling member from a cartridge frame usable with a cartridge, said cartridge including a developing roller rotatable about an axis thereof, wherein said coupling member is effective to receive a rotational force for rotating said developing roller, said method comprising:

a side cover dismounting step of dismounting a side cover from said cartridge frame, wherein said cartridge includes (i) a cylindrical member having a first regulating portion of resin material movable outwardly in a radial direction of said cylindrical member, wherein said first regulating portion is provided at each of a plurality of positions along a circumferential direction of said cylindrical member with intervals in the circumferential direction, and (ii) a bearing member supporting developing roller shaft portion of said developing roller at one longitudinal end portion of said developing roller, wherein in said side cover dismounting step, said cylindrical member is interposed between said bearing member and said side cover, and wherein in a state in which the other end portion of said coupling member is projected through an opening of said side cover and in which a second regulating portion of said side cover is inserted into at least a part of a gap between an inner surface of said cylindrical member and said first regulating portion to regulate deformation of said first regulating portion outward of said cylindrical member in the radial direction; and

a coupling member dismounting step of dismounting, after said side cover is dismounted from said cartridge frame by said side cover dismounting step, said coupling member from said cylindrical member having said coupling member mounted to an inside thereof while deforming said first regulating portion outwardly in a radial direction of said cylindrical member.

21. A method according to claim 20, wherein in said side cover dismounting step, said side cover is dismounted from said cartridge frame integrally with said coupling member in a state in which said coupling member is abutted to an inclination regulating portion by an elastic force of an elastic member of said side cover.