Developing cartridge

Abstract

The utility model discloses a developing box which can be detachably arranged in imaging equipment provided with a photosensitive drum. The developing box comprises a shell, a developing roller, a driving force receiving piece and a forced pushing assembly, the driving force receiving piece is used for receiving driving force from the imaging equipment and driving the developing roller to rotate, and the forced pushing assembly is used for receiving forced pushing force so that the developing roller and the photosensitive drum can be close to each other; the shell comprises a main shell for containing the developer and an end cover arranged at the longitudinal tail end of the main shell, the forced pushing assembly is arranged at one or two longitudinal tail ends of the main shell, and when observed in the longitudinal direction, the forced pushing assembly does not protrude out of the shell. The developing box disclosed by the utility model can reduce the risk that the forced pushing assembly is damaged.

Description

[0001] Division Statement

[0002] This application is a divisional application of the Chinese utility model patent application filed on October 30, 2023, with application number 202322929887.X and invention name “Developing Box”. Technical Field

[0003] The utility model relates to the field of electronic photographic imaging, in particular to a developing box which is detachably installed in an electronic photographic imaging device. Background Art

[0004] A developing cartridge is a container that is detachably mounted in an image forming apparatus.

[0005] The prior art discloses a developing box, comprising a shell, a developing roller rotatably mounted in the shell, and a pushing assembly arranged on the shell. The developing roller can carry developer. When the developing box is working, a force-applying member in the imaging device applies a pushing force to the pushing assembly, so that the developing roller can supply the developer toward the surface of the photosensitive drum arranged opposite to it, thereby developing the electrostatic latent image formed on the surface of the photosensitive drum. When the developing box stops working, the force-applying member no longer applies a pushing force to the pushing assembly, and the developing roller and the photosensitive drum are separated from each other.

[0006] In the structure of the existing developing box, the pushing assembly is arranged to protrude at least partially from the shell. Although this design allows the pushing assembly to easily receive the pushing force, the pushing assembly protruding from the shell may not only puncture the outer packaging of the developing box, but may also be damaged by collision during transportation of the developing box, ultimately affecting the normal use of the developing box. Utility Model Content

[0007] In order to solve the problems existing in the processing box in the prior art, the utility model provides a developing box adopting the following technical solution to reduce the risk of damage to the forced pushing component in the developing box.

[0008] A developing cartridge is detachably mounted in an imaging device provided with a photosensitive drum, the developing cartridge comprising: a housing including a main housing for accommodating a developer; a developing roller rotatably mounted in the main housing; a driving force receiving member disposed at one longitudinal end of the main housing, the driving force receiving member being used to receive a driving force from the imaging device and drive the developing roller to rotate; the developing cartridge further comprising an end cap and a pushing assembly disposed at the longitudinal end of the main housing, the pushing assembly being used to receive a pushing force so that the developing roller and the photosensitive drum approach each other; the pushing assembly not protruding from the housing when viewed along the longitudinal direction. With this structure of the developing cartridge, the pushing assembly is not easily damaged by external components.

[0009] Preferably, when viewed along the longitudinal direction, the forced pushing assembly is blocked by the end cover.

[0010] Preferably, the end cover includes an inner cover and an outer cover formed separately, and along the longitudinal direction, the inner cover is located between the main shell and the outer cover; the inner cover is fixedly connected to the main shell, and the outer cover is fixedly connected to the inner cover or the main shell.

[0011] Preferably, along the longitudinal direction, an installation space is formed between the inner cover and the outer cover, the forced pushing assembly is located in the installation space, and the forced pushing assembly is exposed through an opening of the installation space.

[0012] Preferably, the forced pushing assembly includes a force-bearing member and an elastic member, one end of the elastic member contacts the force-bearing member, and the other end contacts the main shell or the end cover.

[0013] Preferably, the elastic member is a tension spring or a compression spring.

[0014] Another purpose of the present invention is achieved through the following technical solutions.

[0015] A developing cartridge is detachably mounted in an imaging device provided with a photosensitive drum, and comprises: a housing including a main housing for accommodating a developer; a developing roller rotatably mounted in the main housing; a driving force receiving member provided at one longitudinal end of the main housing, the driving force receiving member being used to receive a driving force from the imaging device and drive the developing roller to rotate; the developing cartridge further comprises an end cover and a forced pushing assembly provided at the longitudinal end of the main housing, the forced pushing assembly comprising a force-bearing member and an elastic member, one end of the elastic member being in contact with the force-bearing member, and the other end being in contact with the main housing or the end cover; the force-bearing member comprising a rotating portion, a force-bearing portion, and a connecting portion connecting the rotating portion and the force-bearing portion, the rotation axis of the rotating portion coincides with the rotation axis of the developing roller. A developing cartridge with this structure has a higher efficiency in transmitting the forced pushing force.

[0016] Preferably, the elastic member is a tension spring or a compression spring.

[0017] Preferably, when viewed along the longitudinal direction, the pushing assembly does not protrude from the housing.

[0018] Preferably, the forced pushing assembly is shielded by the end cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the developing box involved in the first embodiment of the present utility model.

[0020] Figure 2 It is a schematic exploded view of the developer cartridge according to the first embodiment of the present invention after the forced pushing assembly is separated from the shell.

[0021] Figure 3 It is a three-dimensional diagram of the driving end of the developing box involved in the first embodiment of the present invention.

[0022] Figure 4A It is a side view of the developing box involved in the first embodiment of the present invention observed along a direction perpendicular to the rotation axis of the developing roller.

[0023] Figure 4B is Figure 4A A side view of the developing box after the forced pushing assembly involved in Example 1 is exposed from the perspective of .

[0024] Figure 5 It is an exploded schematic diagram of the developer cartridge according to the second embodiment of the present invention after the forced pushing assembly is separated from the shell.

[0025] Figure 6A 3. It is a side view of the developing box before the forced pushing assembly involved in the second embodiment is forced to push.

[0026] Figure 6B It is a side view of the developing box after the forced pushing component involved in the second embodiment is forced to push. DETAILED DESCRIPTION

[0027] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0028] [Example 1]

[0029] Figure 1 This is a perspective view of a developing cartridge according to a first embodiment of the present invention; Figure 2 This is an exploded schematic diagram of the developer cartridge according to the first embodiment of the present invention after the forced pushing assembly is separated from the shell; Figure 3 This is a perspective view of the driving end of the developing cartridge according to the first embodiment of the present invention; Figure 4A It is a side view of the developing cartridge according to the first embodiment of the present invention, viewed in a direction perpendicular to the rotation axis of the developing roller; Figure 4B is Figure 4A A side view of the developing box after the forced pushing assembly involved in Example 1 is exposed from the perspective of .

[0030] The developing box 100 can be removably installed in an imaging device provided with a force-applying member 9. The developing box 100 includes a main shell 1 for accommodating a developer, a developing roller 2 rotatably installed in the main shell 1, and a driving force receiving member 3 provided at one longitudinal end of the main shell 1. The driving force receiving member 3 is used to receive a driving force from the imaging device and drive the developing roller 2 to rotate, wherein the developing roller 2 rotates around a rotation axis L2 and transports the developer located in the shell 1 toward the photosensitive drum described below, and the driving force receiving member 3 rotates around a rotation axis L3, and the rotation axis L2 and the rotation axis L3 are parallel to or coincide with each other.

[0031] The direction parallel to the rotation axis L2 or the rotation axis L3 is the longitudinal direction, the end where the driving force receiving member 3 is located is the driving end, and the end opposite to the driving force receiving member 3 is the non-driving end. As shown in the figure, the developing box 100 also includes an end cover 11 arranged at the longitudinal end of the main shell 1, and the combination of the main shell 1 and the end cover 11 forms a shell of the developing box 100, the driving force receiving member 3 is arranged on the same side as the end cover 11, and a portion of the driving force receiving member 3 is exposed outward through the end cover 11.

[0032] In some embodiments, the end cover 11 includes an inner cover 111 and an outer cover 112 formed separately. Along the longitudinal direction, the inner cover 111 is located between the main shell 1 and the outer cover 112. The inner cover 111 is fixedly connected to the main shell 1, and the outer cover 112 is fixedly connected to the inner cover 111 or the main shell 1.

[0033] Furthermore, the developing box 100 also includes a pushing assembly 4 arranged at the longitudinal end of the main shell 1, and the pushing assembly 4 is used to receive the pushing force so that the developing roller 2 and the photosensitive drum 5 are close to each other, so that the developer carried by the developing roller 2 can reach the surface of the photosensitive drum 5, and then develop the electrostatic latent image on the surface of the photosensitive drum 5.

[0034] The forced thrust assembly 4 includes a force-bearing member 41 that can rotate around the rotation axis L4 and an elastic member 42 that abuts against the force-bearing member 41. Preferably, the rotation axis L4 is parallel to the rotation axis L3 / rotation axis L2. The force-bearing member 41 includes a rotating portion 411, a force-bearing portion 412, and a connecting portion 413 connecting the rotating portion 411 and the force-bearing portion 412. Preferably, the rotating portion 411, the force-bearing portion 412 and the connecting portion 413 are formed integrally. The rotating portion 411 is combined with the main shell 1 / end cover 11 in an axial hole-matching manner. One end of the elastic member 42 is in contact with the force-bearing portion 412, and the other end is in contact with the main shell 1 / end cover 11.

[0035] Preferably, the elastic member 42 is configured as a compression spring, and along the line connecting the rotation axis L4 and the rotation axis L2 , the driving force receiving member 3 is located between the force receiving member 41 and the developing roller 2 .

[0036] Along the longitudinal direction, an installation space 113 is formed between the inner cover 111 and the outer cover 112 . The forced pushing assembly 4 is located in the installation space 113 , and the forced pushing assembly 4 is exposed through an opening 114 of the installation space 113 .

[0037] like Figure 4A As shown, when observed along the rotation axis L2 / L3 / L4, the pushing assembly 4 is shielded and protected by the outer cover 112, and the pushing assembly 4 is not easily damaged by external parts. At the same time, the pushing assembly 4 that does not protrude from the shell will make the packaging of the developing box 100 easier, and there is no need to worry about the packaging being punctured by the protruding pushing assembly 4.

[0038] When the developing box 100 is installed to the imaging device, the force-applying member 9 located in the imaging device will enter the installation space 113 through the opening 114. As the force-applying member 9 moves along the M direction, the force-bearing part 412 receives the forced thrust applied by the force-applying member 9 and drives the force-bearing member 41 as a whole to rotate counterclockwise around the rotation axis L4 / rotation part 411. The elastic member 42 is elastically deformed as the force-bearing member 41 rotates. The forced thrust is transmitted to the main shell 1 through the inner cover 111. Finally, the developing roller 2 approaches the photosensitive drum 5. When the force-applying member 9 moves along the N direction, the force-applying member 9 no longer applies a forced thrust to the force-bearing member 412. The elastic member 42 releases the elastic force. The force-bearing member 41 as a whole rotates clockwise around the rotation axis L4 / rotation part 411. The main shell 1 is no longer subjected to the forced thrust, and the developing roller 2 and the photosensitive drum 5 are separated from each other.

[0039] Compared with the design in which the forced pushing component protrudes from the shell, the forced pushing component 4 in this embodiment is located in the installation space 113, and the force-applying member 9 interacts with the force-receiving member 41 in the installation space 113. The movement trajectory of the force-applying member 9 will be limited in the installation space 113, and there is no need to worry about the force-applying member 9 being detached from the forced pushing component 4. It can be seen that the forced pushing component 4 is arranged in the installation space 113 and can also play a role in limiting the movement trajectory of the force-applying member 9 and the forced pushing component 4, ensuring that the force-applying member 9 and the forced pushing component 4 can be stably combined.

[0040] As mentioned above, the elastic member 42 is a compression spring. When the force-applying member 9 moves in the M direction, the elastic member 42 will be compressed. When the force-applying member 9 moves in the N direction opposite to the M direction, the elastic member 42 will be reset. Alternatively, the elastic member 42 can also be a tension spring combined with the force-bearing member 41. When the force-applying member 9 moves in the M direction, the tension spring 42 is stretched. When the force-applying member 9 moves in the N direction, the tension spring 42 is reset.

[0041] The inner cover 111 can be used to carry a driving force transmission component (such as a gear set) that transmits the driving force of the driving force receiving member 3. In some embodiments, the end cover 11 does not need to be provided with an inner cover 111, but only an outer cover 112 is provided. Along the longitudinal direction, the pushing component 4 will be located between the outer cover 112 and the main shell 1, and the installation space 113 is also located between the outer cover 112 and the main shell 1, and the elastic member 42 will directly contact the main shell 1.

[0042] [Example 2]

[0043] Figure 5 This is an exploded schematic diagram of the developer cartridge according to the second embodiment of the present invention after the forced push assembly and the shell are separated; Figure 6A is a side view of the developing cartridge of the forced-pushing assembly involved in the second embodiment before being forced-pushing; Figure 6BIt is a side view of the developing box after the forced pushing component involved in the second embodiment is forced to push.

[0044] In this embodiment, the forced pushing assembly 4 still includes a force-bearing member 41 and an elastic member 42 that are combined with each other, but the structure of the force-bearing member 41 is changed, such as Figure 5 As shown, the force-bearing member 41 includes a rotating part 411, a force-bearing part 412 and a connecting part 413 connecting the rotating part 411 and the force-bearing part 412. The rotating part 411 is coaxially arranged with the developing roller 2, that is, the rotation axis L4 of the force-bearing member 41 in this embodiment is coaxial / coincides with the rotation axis L2 of the developing roller 2.

[0045] One end of the elastic member 42 contacts the force-bearing member 41, and the other end contacts the main housing 1 or the end cover 11. As in the first embodiment, the elastic member 42 can be configured as a tension spring or a compression spring. Figure 6A and Figure 6B As shown, with the movement direction M of the force-applying member 9 applying the thrust as a reference, the elastic member 42 is located on the upstream side of the force-receiving member 41 .

[0046] The elastic member 42 can be elastically deformed as the force-bearing member 41 rotates. Figure 6A and Figure 6B The embodiment of the elastic member 42 is a tension spring, one end of the tension spring 42 is connected to the force-bearing member 41, and the other end is connected to the main housing 1 / end cover 11. When the force-applying member 9 moves along the M direction, the force-bearing portion 412 receives the forced thrust applied by the force-applying member 9, and the force-bearing member 41 as a whole moves around the rotating portion 411 / rotation axis L2 / L4 along Figure 6A When the force-bearing portion 412 / connecting portion 413 contacts the main housing 1 / end cover 11, the developing cartridge 100 is pushed as a whole. Figure 6B As shown, the developing roller 2 is close to the photosensitive drum 5, and the tension spring 42 is stretched; when the force-applying member moves in the N direction opposite to the M direction, the force-applying member 9 no longer applies a pushing force to the force-receiving member 412, and the force-receiving member 41 as a whole rotates around the rotating portion 411 / rotation axis L2 / L4 along Figure 6B The developing roller 2 rotates clockwise, and moves away from the photosensitive drum 5, and the tension spring 42 is reset.

[0047] When the elastic member 42 is configured as a compression spring, similar to the first embodiment, when the force-bearing portion 412 receives the pushing force applied by the force-applying member 9, the compression spring 42 is compressed, and the developing roller 2 approaches the photosensitive drum 5. When the force-applying member 9 no longer applies the pushing force to the force-bearing member 412, the compression spring 42 is reset, and the developing roller 2 moves away from the photosensitive drum 5.

[0048] The rotation axis L4 of the force-bearing member 41 in this embodiment is coaxially arranged with the rotation axis L2 of the developing roller 2. During the rotation of the force-bearing member 41, the forced thrust will be directly transmitted by the force-bearing member 41 to the main shell 1 / end cover 11 without being applied through the elastic member 42. The transmission efficiency of the forced thrust will be higher.

[0049] In the above two embodiments, the forced pushing assembly 4 can be set at one longitudinal end of the main shell 1, or the forced pushing assembly 4 can be set at both longitudinal ends of the main shell 1. When the forced pushing assembly 4 is set at both longitudinal ends of the main shell 1, the two longitudinal ends of the developing roller 2 are subjected to more uniform force, which is conducive to the developing roller 2 and the photosensitive drum 5 maintaining stability in positions close to each other and in positions far away from each other.

Claims

1. A developing cartridge capable of being detachably mounted in an imaging device provided with a photosensitive drum, the developing cartridge comprising a housing, a developing roller, a driving force receiving member, and a forcing assembly, the driving force receiving member being configured to receive a driving force from the imaging device and drive the developing roller to rotate, the forcing assembly being configured to receive a forcing force to bring the developing roller and the photosensitive drum closer to each other; characterized in that: The shell includes a main shell for accommodating the developer and an end cover arranged at the longitudinal end of the main shell; the pushing assembly is arranged at one or both longitudinal ends of the main shell, and when viewed along the longitudinal direction of the main shell, the pushing assembly does not protrude from the shell.

2. The developing cartridge according to claim 1, wherein: The forced pushing assembly includes a force-bearing member and an elastic member. The force-bearing member is rotatably arranged, and the elastic member can be elastically deformed as the force-bearing member rotates.

3. The developing cartridge according to claim 2, wherein: The rotation axis of the force-bearing member and the rotation axis of the developing roller are parallel to or coincide with each other.

4. The developing cartridge according to claim 2, wherein: The force-bearing member includes a rotating portion, a force-bearing portion receiving the forced thrust, and a connecting portion connecting the rotating portion and the force-bearing portion. The rotating portion cooperates with the main housing or the end cover to form an axial hole.

5. The developing cartridge according to claim 2, wherein: The elastic member is a tension spring or a compression spring; one end of the elastic member contacts the force-bearing member, and the other end contacts the main shell or the end cover.

6. The developing cartridge according to claim 2, wherein: The elastic member is a tension spring; during the rotation of the force-bearing member, the thrust will be directly transmitted from the force-bearing member to the main shell or the end cover.

7. The developing cartridge according to claim 1, wherein: When viewed along the longitudinal direction, the pushing assembly is hidden by the end cover.

8. The developing cartridge according to claim 1, wherein: The end cover includes an inner cover and an outer cover which are formed separately. An installation space is formed between the inner cover and the outer cover along the longitudinal direction. The forced pushing assembly is located in the installation space and is exposed through an opening of the installation space.

9. The developing cartridge according to claim 1, wherein: The end cover includes an outer cover, and the forced pushing assembly is arranged in an installation space between the outer cover and the main shell.

10. The developer cartridge according to claim 8 or 9, wherein: The forced pushing assembly includes a force-bearing member and an elastic member. The imaging device is provided with a force-applying member. The force-applying member interacts with the force-bearing member in the installation space. The movement trajectory of the force-applying member is limited in the installation space.

11. The developing cartridge according to claim 1, wherein: The forced pushing assembly includes a force-bearing member and an elastic member. The imaging device is provided with a force-applying member. When the force-applying member applies the forced pushing force to the force-bearing member, the elastic member is elastically deformed.

12. The developing cartridge according to claim 11, wherein: With reference to the movement direction of the force-applying member when applying the forced thrust, the elastic member is located on the upstream side of the force-receiving member.

13. The developing cartridge according to claim 1, wherein: A rotation axis of the driving force receiving member and a rotation axis of the developing roller are parallel to or coincide with each other.

Images