Frame assembly and process cartridge

Abstract

This invention provides a frame assembly and a processing box. The frame assembly includes a frame and a cleaning component. The frame serves as the main body of the waste toner container and has a photosensitive drum mounting position and a charging roller mounting position. The photosensitive drum mounting position and the charging roller mounting position are sequentially arranged along a first direction, which is perpendicular to the length direction of the frame. The frame has a connecting part, and the frame assembly also includes a compressible component. The connecting part, the compressible component, and the cleaning component are sequentially connected, and both the compressible component and the cleaning component extend along the length direction. In the first direction, the charging roller mounting position includes a back side away from the photosensitive drum mounting position, and the cleaning side of the cleaning component is arranged facing the back side. The compressible component is further away from the reference plane than the cleaning component. The reference plane passes through the rotation axis of the photosensitive drum, and the normal direction of the reference plane is the first direction. The processing box includes a photosensitive drum, a charging roller, and the aforementioned frame assembly. This invention optimizes the connection method and setting position of the cleaning component, eliminates the influence of the cleaning component on the charging roller, and ensures print quality.

Description

Technical Field

[0001] This utility model relates to the field of printing consumables technology, specifically to a laser printer printing consumables processing box and its frame assembly. Background Technology

[0002] The processing box includes a frame that serves as the main body of the waste toner container, a photosensitive drum, and a charging roller. The charging roller and the photosensitive drum are parallel to each other and rotatably mounted on the frame, with the charging roller in contact with the outer peripheral surface of the photosensitive drum. The charging roller is floating, allowing it to move closer to or further away from the photosensitive drum via an elastic member. Generally, the frame is also equipped with a toner scraper, which is used to scrape off the waste toner from the photosensitive drum. The scraped-off waste toner falls into the waste toner container of the frame.

[0003] One method for eliminating waste toner involves adding a cleaning component to the waste toner container frame. This cleaning component extends parallel to the charging roller and contacts its outer circumference. This eliminates the need for a scraper; waste toner is transferred to the charging roller and cleaned by the cleaning component. The cleaned waste toner is then evenly distributed on the charging roller and transferred back to the photosensitive drum. Next, under the influence of an electric field, the waste toner is transferred to the developing roller and, as the developing roller rotates, enters the developing chamber, thus achieving waste toner reuse. The cleaning component is integrated into the space of the waste toner container.

[0004] While the existing waste-free processing box improves the utilization rate of toner, the direction of the cleaning component relative to the charging roller is roughly perpendicular to the first direction, while the floating direction of the charging roller away from and towards the photosensitive drum is roughly parallel to the first direction. If the contact force between the cleaning component and the charging roller is large, the resulting large friction will not only affect the normal floating of the charging roller, but may also cause the charging roller to deviate from the contact point with the photosensitive drum; if the contact force between the cleaning component and the charging roller is small, the cleaning effect will be poor. Utility Model Content

[0005] The primary objective of this invention is to provide a frame assembly that eliminates the influence of cleaning components on the charging roller and ensures printing quality.

[0006] The second objective of this invention is to provide a processing box that eliminates the influence of cleaning components on the charging roller and ensures printing quality.

[0007] The first objective of this utility model is to provide a frame assembly including a frame and a cleaning component. The frame serves as the main body of the waste powder storage container. The frame has a photosensitive drum mounting position and a charging roller mounting position, which are arranged sequentially along a first direction, perpendicular to the length direction of the frame. The frame has a connecting part, and the frame assembly also includes a compressible component. The connecting part, the compressible component, and the cleaning component are connected sequentially, and both the compressible component and the cleaning component extend along the length direction. In the first direction, the charging roller mounting position includes a back side away from the photosensitive drum mounting position, the cleaning side of the cleaning component is arranged facing the back side, and the compressible component is farther away from the reference plane than the cleaning component. The reference plane passes through the rotation axis of the photosensitive drum, and the normal direction of the reference plane is the first direction.

[0008] As can be seen from the above solution, this utility model eliminates the influence of the cleaning component on the charging roller by improving the connection method and adjusting its setting position. Specifically, the cleaning component and the charging roller are installed with their backs facing each other, that is, the contact position between the cleaning component and the charging roller is located away from the photosensitive drum. In this way, the contact force of the cleaning component on the charging roller will not cause the charging roller to deviate from the contact point with the photosensitive drum. Furthermore, the cleaning component is not directly glued to the frame, but is connected through a compressible component with a certain degree of elastic deformation and recoverability. This not only ensures the contact degree between the cleaning component and the surface of the charging roller and guarantees the cleaning effect, but also ensures the mobility of the charging roller by compressing the compressible component when the charging roller needs to float away from the photosensitive drum. Therefore, the influence of the cleaning component on the charging roller is eliminated, and the printing quality is guaranteed.

[0009] A further option is that the compressible component and the cleaning component are connected sequentially along a first direction; or, the frame is provided with a floating guide structure, and the compressible component and the cleaning component are connected sequentially along the extension direction of the floating guide structure.

[0010] As can be seen from the above, both settings can ensure that the contact direction between the cleaning component and the charging roller, as well as the compressible direction of the cleaning component, are closer to the first direction or the floating direction of the charging roller, thereby further eliminating the influence of the cleaning component on the charging roller.

[0011] A further improvement is that the connecting part is a boss extending along the length direction.

[0012] As can be seen from the above, the boss extending along the length direction ensures that the compressible and cleaning parts along the length direction are effectively fixed.

[0013] A further approach is to integrally mold the boss into the frame.

[0014] As can be seen from the above, this setting reduces the number of parts in the frame assembly, ensuring stable and reliable installation of the cleaning components.

[0015] A further proposed solution is to have a waste powder hopper in the frame, with the protrusion located outside the waste powder hopper.

[0016] As can be seen from the above, the cleaning component in the background technology utilizes the space of the waste powder hopper for installation. This installation requires molding or installing a support structure within the existing waste powder hopper of the powder cartridge, resulting in significant mold modifications or even the need for mold redesign, or the addition of installation steps. In contrast, the boss is located outside the waste powder hopper, using the raised structure of the side panel of the waste powder hopper as the boss. This can be accomplished with only minor mold modifications, reducing design changes and eliminating the need for mold redesign, thus lowering costs.

[0017] A further option is to have a hollow hole and a demolding opening for the hollow hole on the boss.

[0018] A further approach is to place the demolding opening of the hollow hole on the surface of the boss that connects to the compressible part.

[0019] As can be seen from the above, the hollow design of the boss ensures that the wall thickness of the boss is appropriate and avoids the problem of cooling and shrinkage after the frame is injected. A better solution is that the demolding hole of the hollow hole of the boss is formed on the bonding plane 6 so that the extension direction of the hollow hole is consistent with the demolding direction of the frame 1, so that the frame 1 with the boss having the hollow hole 1101 is easy to demold.

[0020] Another further design is to have a waste powder hopper in the frame, with the protrusion located outside the waste powder hopper.

[0021] As can be seen from the above, the cleaning component in the background technology utilizes the space of the waste powder hopper for installation. This installation requires molding or installing a support structure within the existing waste powder hopper of the powder cartridge, resulting in significant mold modifications or even the need for mold redesign, or the addition of installation steps. In contrast, the boss is located outside the waste powder hopper, using the raised structure of the side panel of the waste powder hopper as the boss. This can be accomplished with only minor mold modifications, reducing design changes and eliminating the need for mold redesign, thus lowering costs.

[0022] Another further solution is to use a sponge as the compressible component, which is then bonded to the connecting part.

[0023] As can be seen from the above, sponges have good compressibility and resilience, and their smooth surface is very conducive to adhesive stability.

[0024] A further proposed solution is to use a cleaning brush as the cleaning component, with the brush attached to a sponge.

[0025] As can be seen above, the brush can produce a uniform cleaning effect and is gentle without damaging the surface of the charging roller.

[0026] The second objective of this utility model is to provide a processing box that includes a photosensitive drum and a charging roller. The processing box also includes the aforementioned frame assembly. The photosensitive drum is installed at the photosensitive drum installation position, and the charging roller is installed at the charging roller installation position, with the cleaning side contacting the surface of the charging roller.

[0027] A further design includes a floating component in the processing box, through which the charging roller is floatingly mounted to the frame; therefore, the direction in which the compressible component and the cleaning component are arranged sequentially is consistent with the floating direction of the charging roller.

[0028] As can be seen from the above solution, the compression and recovery directions of the cleaning component are consistent with the floating direction of the charging roller. The contact force between the cleaning component and the charging roller will not cause the charging roller to deviate from its contact point with the photosensitive drum. The cleaning component, connected by a compressible component with a certain degree of elastic deformation and recoverability, ensures the degree of contact between the cleaning component and the surface of the charging roller, guaranteeing the cleaning effect. Furthermore, when the charging roller needs to float away from the photosensitive drum, the compressible component compresses to ensure the mobility of the charging roller. Therefore, the influence of the cleaning component on the charging roller is eliminated, ensuring print quality. Attached Figure Description

[0029] Figure 1 This is a structural diagram of some components of the first embodiment of the processing box of this utility model.

[0030] Figure 2 This is an exploded view of some components of the first embodiment of the processing box of this utility model.

[0031] Figure 3 This is an exploded view of the frame and charging roller of the first embodiment of the processing box of this utility model.

[0032] Figure 4 for Figure 2 Enlarged view of point A in the middle.

[0033] Figure 5 for Figure 3 Enlarged view of point B in the middle.

[0034] Figure 6 This is an exploded view of the frame and floating component of the first embodiment of the processing box of this utility model.

[0035] Figure 7 This is an axial sectional view of some components of the first embodiment of the processing box of this utility model.

[0036] Figure 8 This is a schematic diagram of the second embodiment of the processing box of this utility model.

[0037] Figure 9 This is a schematic diagram of the third embodiment of the processing box of this utility model. Detailed Implementation

[0038] First embodiment of frame assembly and processing box See Figure 1 Processing boxes include, but are not limited to Figure 1The components shown are: frame 1, photosensitive drum 2, charging roller 3, floating component 4, cleaning component 5, and compressible component 6. The frame 1 serves as the main body of the waste powder bin of the processing box, and the frame 1, cleaning component 5, and compressible component 6 constitute the frame assembly of this utility model.

[0039] See Figure 1 and Figure 2 The frame 1 has a photosensitive drum mounting position 102 and a charging roller mounting position 103. The photosensitive drum 2 is mounted at the photosensitive drum mounting position 102, and the charging roller 3 is mounted at the charging roller mounting position 103. The photosensitive drum 2 and the charging roller 3 are parallel to each other and can be rotatably mounted on the frame 1. The axial direction of the photosensitive drum 2 and the axial direction of the charging roller 3 are both along the length of the frame 1.

[0040] In this invention, the photosensitive drum mounting position 102 refers to the entire area occupied by the photosensitive drum 2 installed in the frame 1, and the charging roller mounting position 103 refers to the entire area occupied by the charging roller 3 installed in the frame 1. Combined with... Figure 3 The frame 1 is equipped with a waste toner hopper 109, and the photosensitive drum 2 and its installation position 102 are located opposite to the inlet of the waste toner hopper 109.

[0041] See Figure 3 and Figure 4 The frame 1 is provided with a connecting part 11, and the connecting part 11, the compressible part 6, and the cleaning part 5 are connected in sequence, with the compressible part 6 and the cleaning part 5 both extending along the length direction. In this embodiment, the connecting part 11 is a boss extending along the length direction of the frame 1, and the boss is integrally formed in the frame 1. In this embodiment, the boss is located outside the waste powder bin 109. Further, the frame 1, which is the main body of the waste powder bin, is provided with a waste powder bin 109 for recycling waste powder. The boss being located outside the waste powder bin 109 means that the boss is not located on the inner periphery of the inner peripheral wall surrounding the waste powder bin 109, nor is it located on the bottom wall of the waste powder bin 109. In this embodiment, the boss protrudes from the side wall of the waste powder bin 109.

[0042] In addition, the boss is provided with an adhesive surface 110 for bonding the compressible part 6. The boss has a hollow hole 1101 and a demolding hole for the hollow hole 1101. The demolding hole for the hollow hole 1101 is located on the adhesive surface 110, the surface to which the compressible part 6 is bonded. The hollow design of the boss ensures that the wall thickness of the boss is appropriate, avoiding the problem of cooling and collapse of the frame 1 after injection molding. Furthermore, the demolding hole for the hollow hole 1101 of the boss is formed on the adhesive surface 6 so that the extension direction of the hollow hole is consistent with the demolding direction of the frame 1, making the frame 1 easy to demold even with a boss having a hollow hole 1101.

[0043] In this embodiment, the compressible component 6 is a sponge, and the flat surface of the sponge is bonded to the bonding plane 110 of the connecting part 11; in this embodiment, the cleaning component 5 is a brush, and the flat back of the brush is bonded to the sponge, and the cleaning side 51 of the brush contacts the surface of the charging roller 3.

[0044] See Figure 5 and Figure 6 The charging roller 3 is floatingly mounted on the frame 1 via two sets of floating components 4, and the charging roller 3 can float in the direction of approaching or moving away from the photosensitive drum 2 due to the elastic force of the floating components 4.

[0045] Furthermore, the frame 1 is provided with a floating guide structure 104, which is used to install the floating component 4. The charging roller 3 is floatingly installed on the frame 1 through the floating component 4. The floating guide structure 104 is a groove provided on the inner side of the side wall in the length direction of the frame 1. The bottom extension of the groove is provided with a first positioning post 1041 whose extension direction is consistent with the extension direction of the groove.

[0046] The floating component 4 includes a floating element 41 and a spring (not shown). The floating element 41 has a rotating connection part 410 and a second positioning post 411 at its opposite ends. The rotating connection part 410 includes a C-shaped shaft hole, which is rotatably connected to the short shaft at the axial end of the charging roller 3. The floating element 41 engages with the wall of the slide groove and can slide along the slide groove. The spring is set in the slide groove and its two ends are respectively sleeved on the first positioning post 1041 and the second positioning post 411. Under the restoring force of the spring, the charging roller 3 contacts the surface of the photosensitive drum 2, and the deformability of the spring realizes the floating setting of the charging roller 3.

[0047] Combination Figure 7 In this embodiment, the photosensitive drum mounting position 102 and the charging roller mounting position 103 are sequentially arranged along the first direction a, such as... Figure 7 As shown in the axial projection, the photosensitive drum mounting position 102 and the charging roller mounting position 103 are sequentially arranged along the first direction a, meaning that the extension direction of the line L connecting the rotation axis 20 of the photosensitive drum mounting position 102 and the rotation axis 30 of the charging roller mounting position 103 is the first direction a. The first direction a is perpendicular to the length direction of the frame 1.

[0048] In the first direction a, the charging roller mounting position 103 includes a back side 1039 away from the photosensitive drum mounting position 102, wherein the back side 1039 refers to... Figure 7 The semi-cylindrical portion shown in thick lines, which coincides with the surface of the charging roller 3 and forms a semi-circular line in the axial projection, has a boundary surface H2 on the back side that is the rotation axis 30 of the overcharging roller 3 and is perpendicular to the first direction a.

[0049] See also Figure 7In this embodiment, the extension direction of the floating guide structure 104 (slide groove) is basically parallel to the first direction a (the angle difference is no more than 5 degrees). More preferably, the extension direction of the floating guide structure 104 (slide groove) is completely parallel to the first direction a.

[0050] The preferred embodiment is that the connecting part 11, the compressible part 6 and the cleaning part 5 are connected sequentially along the first direction a, or the connecting part 11, the compressible part 6 and the cleaning part 5 are connected sequentially along the extension direction of the floating guide structure 104 (the floating direction of the charging roller 3).

[0051] The cleaning side 51 of the cleaning component 5 is disposed facing the back side 1039 and abuts against the surface of the charging roller 3, and the compressible component 6 is farther away from the reference surface H1 than the cleaning component 5. The reference surface H1 passes through the rotation axis 20 of the photosensitive drum and the normal of the reference surface H1 is the first direction a.

[0052] This invention eliminates the influence of the cleaning component 5 on the charging roller by improving the connection method of the cleaning component 5 and adjusting the setting position of the cleaning component 5. Specifically, the cleaning component 5 is positioned opposite the back side of the charging roller mounting position 103, that is, the position where the cleaning component 5 contacts the charging roller is located away from the photosensitive drum. In this way, the contact force of the cleaning component 5 on the charging roller will not cause the charging roller to deviate from the contact point with the photosensitive drum.

[0053] The cleaning component 5 is not directly glued to the frame, but is connected via a compressible component 6 with a certain degree of elastic deformation and resilience. This not only ensures the contact between the cleaning component 5 and the surface of the charging roller, guaranteeing the cleaning effect, but also allows the compressible component 6 to compress and ensure the mobility of the charging roller when it needs to float away from the photosensitive drum. Therefore, the influence of the cleaning component 5 on the charging roller is eliminated, ensuring print quality.

[0054] Further advantages include the good compressibility and resilience of the sponge, and its smooth surface is very conducive to adhesive stability; while the brush can produce a uniform cleaning effect and is gentle without damaging the surface of the charging roller.

[0055] A further advantage is that the cleaning component 5 in the prior art utilizes the space of the existing waste powder hopper, which requires molding or installing a support structure within the existing waste powder hopper of the powder box. This necessitates significant mold modifications, sometimes even requiring a complete mold design, or additional installation steps. In contrast, the boss is located outside the waste powder hopper, using the raised structure of the waste powder hopper's side panel as the boss. This can be achieved with only minor mold modifications, reducing design changes and eliminating the need for mold redesign, thus lowering costs.

[0056] Second and third embodiments of the frame assembly and processing box See Figure 8 In the second embodiment, the direction b in which the compressible member 71 and the cleaning member 72 are sequentially arranged forms an angle with the first direction a. Similarly, see... Figure 9 In the third embodiment, the direction c in which the compressible member 73 and the cleaning member 74 are arranged sequentially forms an angle with the first direction a.

[0057] In the second and third embodiments, although the directions in which the compressible component and the cleaning component are sequentially arranged are not substantially consistent with the first direction a, the cleaning component is completely opposite to the back side formed by the boundary surface H2 (the cleaning component does not cross the boundary surface H2), and as... Figure 8 and Figure 9 In both embodiments shown, the compressible component is farther from the reference plane H1 than the clean component, therefore both the second and third embodiments are within the protection scope of this utility model.

[0058] In the first embodiment, the boss has multiple hollow holes arranged sequentially along the length of the frame, and the hollow holes are separated by reinforcing ribs. Of course, other arrangements of hollow holes are still within the scope of this invention. For example, the boss may only include a circumferential wall, within which undivided, relatively large hollow holes are formed. Furthermore, the extension direction of the hollow holes is based on their demolding direction, not on the orientation of the surface where the demolding hole of the hollow hole is located.

[0059] Finally, it should be emphasized that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A frame assembly, comprising a frame and a cleaning component, wherein the frame serves as the main body of a waste powder storage container, and the frame is provided with a photosensitive drum mounting position and a charging roller mounting position, wherein the photosensitive drum mounting position and the charging roller mounting position are sequentially arranged along a first direction, the first direction being perpendicular to the length direction of the frame; Its features are: The frame is provided with a connecting part, and the frame assembly also includes a compressible component. The connecting part, the compressible component, and the cleaning component are connected in sequence, and both the compressible component and the cleaning component extend along the length direction. In the first direction, the charging roller mounting position includes a back side away from the photosensitive drum mounting position, the cleaning side of the cleaning component is disposed towards the back side, and the compressible component is further away from the reference surface than the cleaning component. The reference surface passes through the rotation axis of the photosensitive drum and the normal of the reference surface is the first direction.

2. The frame assembly according to claim 1, characterized in that: The compressible component and the cleaning component are connected sequentially along the first direction; or, The frame is provided with a floating guide structure, and the compressible component and the cleaning component are connected sequentially along the extension direction of the floating guide structure.

3. The frame assembly according to claim 2, characterized in that: The connecting part is a boss extending along the length direction.

4. The frame assembly according to claim 3, characterized in that: The boss is integrally formed into the frame.

5. The frame assembly according to claim 4, characterized in that: The boss is provided with a hollow hole and a demolding opening for the hollow hole.

6. The frame assembly according to claim 5, characterized in that: The demolding opening of the hollow hole is located on the surface of the boss that is connected to the compressible part.

7. The frame assembly according to claim 3, characterized in that: The frame is equipped with a waste powder bin, and the protrusion is located outside the waste powder bin.

8. The frame assembly according to any one of claims 1 to 7, characterized in that: The compressible component is a sponge, and the sponge is adhered to the connecting part; And / or, the cleaning component is a brush, which is adhered to the compressible component.

9. A processing box, comprising a photosensitive drum and a charging roller, characterized in that: The processing box further includes the frame assembly as described in any one of claims 1 to 8, wherein the photosensitive drum is mounted at the photosensitive drum mounting position, the charging roller is mounted at the charging roller mounting position, and the cleaning side contacts the surface of the charging roller.

10. The processing box according to claim 9, characterized in that: The processing box also includes a floating component, through which the charging roller is floatingly mounted to the frame; Therefore, the direction in which the compressible component and the cleaning component are arranged sequentially is consistent with the floating direction of the charging roller.

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