Processing box

Abstract

The utility model relates to a photosensitive developing device which comprises a developing unit and a photosensitive unit, the photosensitive unit comprises a photosensitive shell and a photosensitive drum rotatably mounted on the photosensitive shell, the photosensitive drum comprises a roll shaft and a roller mounted on the roll shaft, and the surface of the roller is provided with a photosensitive coating. The processing box further comprises a conductive piece and a separation shifting block, the conductive piece enables the roller and the roller shaft to be electrically connected, the separation shifting block can move from a first position to a second position to shift the conductive piece, and the conductive piece makes contact with the roller at the first position so that the roller can be electrically connected with the roller shaft. And at the second position, the conductive part is separated from the roller so as to cut off the electric connection between the roller and the roller shaft. According to the processing box disclosed by the utility model, the roller and the roll shaft of the photosensitive drum are electrically connected through the conductive piece, and the conductive piece is moved through the separation shifting block to separate the conductive piece from the roller, so that the electric connection between the roller and the roll shaft is cut off, and the processing box can be in a working stop state under the condition that the photosensitive unit is not moved.

Description

Technical Field

[0001] The utility model relates to a processing box, in particular to a processing box that can be detachably installed on a laser imaging device. Background Art

[0002] Process cartridges are essential printing consumables for laser imaging devices. They consist of a developing unit and a photosensitive unit. The developing unit has a developing roller, while the photosensitive unit has a photosensitive drum and a charging roller. The photosensitive drum consists of a roller shaft and a drum. The drum is made of a conductive metal material, typically aluminum, and has a photosensitive coating on its surface. The drum is fixedly mounted on the roller shaft, rotating with the shaft and electrically connected to the shaft to transfer the charge on the drum to the imaging device.

[0003] When the process cartridge is operating, the developer is first attracted to the surface of the developer roller through the action of an electric charge. The developer attached to the developer roller surface is negatively charged. The charging roller also negatively charges the photosensitive coating of the photosensitive drum. Because the developer on the developer roller surface and the photosensitive coating on the photosensitive drum surface have the same charge polarity and repel each other, the developer on the developer roller surface cannot be transferred to the photosensitive drum surface. The laser irradiates the photosensitive coating of the photosensitive drum, and the irradiated portion of the photosensitive coating becomes a conductor. The charge on the photosensitive coating is then transferred to the roller and, through the roller and roller shaft, to the imaging device. The unirradiated portion of the photosensitive coating still has a negative charge, forming the so-called electrostatic latent image. The negatively charged developer on the developer roller surface is attracted to the location of the electrostatic latent image on the photosensitive drum surface. The developer on the photosensitive drum surface is then transferred to the paper surface by the transfer roller. After the fusing process, the laser printing is completed.

[0004] A color laser imaging device is equipped with four process cartridges, each containing a developer of one of four colors (cyan, magenta, yellow, and black). In color printing mode, all four process cartridges operate simultaneously. In black printing mode, only the process cartridge containing black developer operates; the other process cartridges remain inactive. For ease of description, the process cartridges containing cyan, magenta, and yellow developer are referred to as color process cartridges, while the process cartridge containing black developer is referred to as the black process cartridge.

[0005] Chinese patent CN104583879A discloses an imaging device and a process cartridge equipped with four color process cartridges. In black-and-white printing mode, a separator in the imaging device pushes the housing of the photosensitive unit to move the photosensitive unit, thereby separating the photosensitive drum and the developing roller by a certain distance. This prevents the developer on the developing roller from transferring to the photosensitive drum surface due to the charge, causing the color process cartridge to stop operating.

[0006] Imaging devices and processing boxes are both precision-structured components. Frequent movement of the photosensitive unit will affect the matching accuracy between the components, which in turn will easily affect the printing quality. Utility Model Content

[0007] The utility model aims to provide a processing box which can stop working without moving a photosensitive unit.

[0008] To achieve the above-mentioned objectives, the present invention provides a process cartridge comprising a developing unit and a photosensitive unit. The developing unit comprises a developing housing and a developing roller rotatably mounted on the developing housing. The photosensitive unit comprises a photosensitive housing and a photosensitive drum rotatably mounted on the photosensitive housing. The photosensitive drum comprises a roller shaft and a roller mounted on the roller shaft, the surface of the roller having a photosensitive coating. The present invention also provides a conductive member and a separating block. The conductive member electrically connects the roller to the roller shaft. The separating block can be moved from a first position to a second position to move the conductive member. In the first position, the conductive member contacts the roller, thereby electrically connecting the roller to the roller shaft. In the second position, the conductive member separates from the roller, thereby severing the electrical connection between the roller and the roller shaft.

[0009] The processing box of the utility model electrically connects the roller and the roller shaft of the photosensitive drum through a conductive member, and moves the conductive member through a separation block to separate the conductive member from the roller, thereby cutting off the electrical connection between the roller and the roller shaft. In this way, the processing box can be put into a stopped working state without moving the photosensitive unit.

[0010] In one embodiment, the separation block is rotatably mounted on one end of the process cartridge, and the separation block can be rotated from a first position to a second position. The rotational movement of the separation block is easy to achieve and saves structural space.

[0011] In one embodiment, the separation block includes a separation protrusion, which can force the conductive member to separate from the roller when moving.

[0012] In one embodiment, the process cartridge includes a bracket that is detachably mounted to an end portion of the developer housing.

[0013] In one embodiment, the separation switch block is mounted on the bracket.

[0014] In one embodiment, the conductive member includes a first end and a second end, the first end can be electrically connected to the roller shaft, and the second end can be electrically contacted with the roller.

[0015] In one embodiment, the conductive member is a torsion spring, which can automatically return to its initial position, thereby facilitating automatic resetting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of a processing box of the present invention according to one embodiment.

[0017] Figure 2 yes Figure 1 An exploded view of the process cartridge is shown.

[0018] Figure 3 yes Figure 1 The shown part is an enlarged view of the process box with the end cover removed.

[0019] Figure 4 It is a three-dimensional diagram of the separation and shifting block of the processing box of the utility model.

[0020] Figure 5 It is a schematic diagram of the first working state of the processing box of the utility model.

[0021] Figure 6 It is a schematic diagram of the second working state of the processing box of the utility model. DETAILED DESCRIPTION

[0022] The structure and other aspects of the processing box of the present invention are further described in detail below through specific implementations and with reference to the accompanying drawings.

[0023] like Figures 1 to 3 As shown, the process cartridge of the present invention includes a developing unit 1 and a photosensitive unit 2. The developing unit 1 includes a developing housing 11 and a developing roller 12. The developing roller 12 is rotatably mounted on the developing housing 11, and the developing housing 11 has a cavity for accommodating new developer. The photosensitive unit 2 includes a photosensitive housing 21, a photosensitive drum 22, and a charging roller (not shown). The photosensitive drum 22 and the charging roller are rotatably mounted on the photosensitive housing 21. The charging roller is arranged parallel to the photosensitive drum 22 and is used to charge the surface of the photosensitive drum 22.

[0024] The photosensitive drum 22 includes a roller shaft 221 and a roller 222. The roller 222 is fixedly mounted on the roller shaft 221 and rotates together with the roller shaft 221. Both ends of the roller shaft 221 are rotatably mounted on the photosensitive housing 21. A drive head 223 is mounted on one end of the roller shaft 221. The drive head 223 is coupled to a drive motor in the imaging device to receive a driving force from the imaging device. The roller 222 is made of metal, typically an aluminum cylinder. A photosensitive coating is provided on the circumferential surface of the roller 222. Along the length direction of the roller 222, the length of the photosensitive coating is less than the length of the roller 222, so that at both ends of the roller 222, at least part of the roller 222 is not covered by the photosensitive coating.

[0025] The process cartridge of the present invention also includes a conductive member 4 and a separating block 5. The conductive member 4 electrically connects the roller 222 to the roller shaft 221. The roller shaft 221 is electrically connected to the imaging device and ultimately grounded. In a specific embodiment, the conductive member 4 is a metal torsion spring. The conductive member 4 has a first end 41 and a second end 42. The first end 41 is electrically connected to the roller shaft 221, and the second end 42 can be electrically connected to the roller 222, thereby electrically connecting the roller 222 to the roller shaft 221. Specifically, the second end 42 of the conductive member 4 overlaps a portion of the roller 222 not covered by the photosensitive coating. The separating block 5 is rotatably mounted at one end of the process cartridge. The separating block 5 is movable from a first position to a second position. When the separating block 5 is moved, it moves the second end 42 of the conductive member 4, thereby separating the second end 42 from the roller 222. In the first position, the conductive member 4 contacts the roller 222, thereby electrically connecting the roller 222 to the roller shaft 221. In the second position, the conductive member 4 is separated from the roller 222 , thereby cutting off the electrical connection between the roller 222 and the roller shaft 221 .

[0026] In a specific embodiment, a bracket 111 is provided at one end of the developer housing 11, and the bracket 111 is detachably mounted to one end of the developer housing 11. The bracket 111 is used to support rotatable parts on the developer unit 1, such as the roller shaft of the developer roller 12 and the transmission gear. A column 112 is provided on the bracket 111, and the separation block 5 is rotatably mounted on the column 112. The conductive member 4 is also mounted on the bracket 111, and a column 113 is provided on the bracket 111. The middle part of the conductive member 4 is sleeved on the column 113. Figure 4 As shown, in one embodiment, a separation protrusion 51 is provided on the separation block 5 . When the separation block 5 is rotated, the separation protrusion 51 contacts and pushes the second end 42 of the conductive member 4 to move, thereby separating the second end 42 from the roller 222 .

[0027] The processing cartridge of the present invention can be removably installed in an imaging device. The imaging device is provided with a separator 7, which is rotatably installed in the imaging device. Specifically, the first end 71 of the separator 7 is rotatably installed in the imaging device, and the second end 72 contacts the elastic member 8. The second end 72 can return to its initial position under the action of the elastic member 8. The second end 72 is a hook. When the separator 7 moves, it can push the separation block 5 from the first position to the second position. The structure and working principle of the imaging device and the separator are disclosed in detail in Chinese Patent CN104583879A. The present invention only improves the structure of the processing cartridge.

[0028] When the process cartridge of the present invention is installed into the imaging device along the installation direction X, the separation block 5 of the process cartridge will force the second end 72 of the separation member 7 to retreat, and the separation member 7 rotates around the first end 71. The second end 72 moves downward under the pressure of the separation block 5 and forces the elastic member 8 to contract. In this way, the separation block 5 of the process cartridge can pass over the second end 72 of the separation member 7 and be installed to the predetermined position, such as Figure 5 When the separating block 5 passes over the second end 72 of the separating member 7 , the second end 72 returns to its initial position under the action of the elastic member 8 .

[0029] When the processing box of the present invention leaves the factory and the imaging device is in color printing mode, for the four color processing boxes, the first end 41 of the conductive member 4 is electrically connected to the roller 221, and the second end 42 is electrically connected to the roller 222. When the imaging device is in black and white printing mode, three of the color processing boxes need to stop working, and only the black processing box is in working state. The separation member 7 corresponding to the color processing box in the imaging device moves along the installation direction X and pulls the separation block 5 to rotate from the first position to the second position. When the separation block 5 rotates, the separation protrusion 51 of the separation block 5 pushes the second end 42 of the conductive member 4 to move, so that the second end 42 of the conductive member 4 is separated from the roller 222 of the photosensitive drum 22. Figure 6 As shown, the electrical connection between roller 222 and roller shaft 221 is now severed. The laser head of the imaging device irradiates the photosensitive coating of the photosensitive drum 22. Since the electrical connection between roller 222 and roller shaft 221 is severed, the charge on the photosensitive coating is not conducted away through roller 222 and roller shaft 221. Consequently, the developer on the developing roller 12 is not transferred to the photosensitive drum 22, thus rendering the process cartridge in an inoperative state.

[0030] When the imaging device needs to be in color printing mode again, the separating member 7 corresponding to the color process cartridge moves in a direction opposite to the installation direction X. The second end 42 of the conductive member 4 elastically recovers and drives the separating paddle block 5 to return to its initial state. The second end 42 of the conductive member 4 contacts the roller 222 again, thereby electrically connecting the roller 222 and the roller shaft 221. The color process cartridge can then operate normally.

[0031] The processing cartridge of the present invention electrically connects the roller 222 and the roller shaft 221 of the photosensitive drum 22 through the conductive member 4, and moves the conductive member 4 through the separation block 5 to separate the conductive member 4 from the roller 222, thereby cutting off the electrical connection between the roller 222 and the roller shaft 221, so that the processing cartridge can be put into a stopped working state without moving the photosensitive unit.

[0032] The above embodiments are intended only to illustrate the concept and scope of the present invention and are not intended to limit the scope of protection of the present invention. Modifications, equivalent substitutions, and other improvements to the above embodiments that are obvious to those skilled in the art are also within the concept of the present invention. The scope and concept of protection of the present invention are specifically defined by the claims.

Claims

1. A process cartridge that can be detachably mounted in an imaging device having a separate member, the process cartridge comprising A developing unit comprising a developing housing and a developing roller rotatably mounted on the developing housing; as well as The photosensitive unit comprises a photosensitive housing and a photosensitive drum rotatably mounted on the photosensitive housing, wherein the photosensitive drum comprises a roller shaft and a roller mounted on the roller shaft, wherein the surface of the roller has a photosensitive coating; It is characterized by: The processing box also includes: A conductive member electrically connecting the roller and the roller shaft; as well as A separation block is movable from a first position to a second position to move the conductive member. In the first position, the conductive member contacts the roller to electrically connect the roller to the roller shaft. In the second position, the conductive member separates from the roller to cut off the electrical connection between the roller and the roller shaft.

2. The process cartridge according to claim 1, wherein The separation block is rotatably mounted on one end of the process cartridge, and the separation block can be rotated from a first position to a second position.

3. The process cartridge according to claim 1, wherein The separation block includes a separation protrusion, and when the separation protrusion moves, it can force the conductive member to separate from the roller.

4. The process cartridge according to claim 1, wherein The process cartridge includes a bracket that is detachably mounted to an end portion of the developing casing.

5. The process cartridge according to claim 4, wherein: The separation block is mounted on the bracket.

6. The process cartridge according to claim 1, wherein The conductive member includes a first end and a second end, wherein the first end can be electrically connected to the roller shaft, and the second end can be electrically contacted with the roller.

7. The process cartridge according to claim 6, wherein: The conductive member is a torsion spring.

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