Processing box

Abstract

The utility model provides a processing box which comprises a photosensitive drum, a developing roller, a first frame capable of rotatably supporting the photosensitive drum and a second frame capable of rotatably supporting the developing roller, and a rotating shaft of the photosensitive drum extends along the width direction of the processing box; a rotating shaft of the developing roller extends along the width direction of the processing box; the second frame is movably mounted on the first frame and can horizontally swing or translate between a first position where the developing roller is in contact with the photosensitive drum and a second position where the developing roller is separated from the photosensitive drum; the lower side of the second frame is provided with a thrust receiving part for receiving thrust for pushing the second frame from the first position to the second position; according to the processing box with the structure, the friction force borne by the thrust receiving part is reduced, and the service life of the processing box is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of printing, in particular to a processing box which is detachably installed on an electronic imaging device. Background Art

[0002] In the prior art, an electronic imaging device generally includes a driving unit for outputting a rotational driving force, and a processing box can be detachably mounted on the electronic imaging device and cooperate with the driving unit to receive the rotational driving force output by the driving unit. Generally, the processing box includes a power receiving unit, a developing roller, a powder discharge knife, and a box body for accommodating the above components. Some processing boxes also include a photosensitive drum, a charging roller or a corona wire, a cleaning blade, and a stirring component.

[0003] The power receiving unit is arranged at one end of the processing box along the longitudinal direction of the processing box, and according to different types of processing box structures, when the processing box is installed to the electronic imaging device, the power receiving unit and the driving unit of the electronic imaging device are engaged with each other, so that the rotational driving force output by the driving unit is transmitted to the processing box to drive the rotating parts inside the processing box (such as developing roller, photosensitive drum, stirring part, etc.) to rotate, and then participate in the developing work of the electronic imaging device.

[0004] There is a processing box, which includes a photosensitive drum, a developing roller for developing a latent image on the photosensitive drum, a first frame that rotatably supports the photosensitive drum to allow the photosensitive drum to rotate around the rotating axis of the photosensitive drum, and a second frame that rotatably supports the developing roller to allow the developing roller to rotate around the rotating axis of the developing roller.

[0005] The second frame is rotatable about a pivot between a first position where the developing roller contacts the photosensitive drum and a second position where the developing roller is separated from the photosensitive drum. A coupling of the developing roller is disposed at one end of the second frame and is operatively connected to the developing roller, and the coupling of the developing roller is configured to transmit a rotational force to the developing roller. A side end wall is attached to one end of the second frame and has an end wall body, a hole is formed on the end wall body, and the coupling of the developing roller is exposed to the outside of the box through the hole. A protrusion is operatively connected to one end of the second frame, and a portion of the surface of the protrusion is configured to receive a thrust for moving the second frame from its first position to its second position. The processing box is matched as follows: when the second frame is in the first position, the photosensitive drum and the protrusion are located at the lower side of the processing box, the axis of the photosensitive drum is located below the axis of the developing roller, and the aforementioned surface of the protrusion is disposed below the side end wall when viewed along the axial direction of the photosensitive drum. A pushing portion for applying a thrust to the protrusion is provided on the electronic imaging device. Since the second frame is hinged to the first frame by a pivot, the axis of the photosensitive drum is located below the axis of the developing roller. When viewed along the axial direction of the photosensitive drum, the developing roller presses the photosensitive drum obliquely upward, which accelerates the fatigue aging of the coating on the surface of the photosensitive drum. In addition, the developing bin has a small storage space and a small amount of toner stored. During the rotation of the second frame around the pivot, the protrusion swings upward, and there is sliding friction in the height direction between the surface of the protrusion for receiving the thrust and the pushing block that pushes the protrusion, which makes the protrusion easy to wear and has a short life.

[0006] A return spring is arranged between the second frame and the first frame. When the thrust acting on the protrusion is withdrawn, the second frame is pushed by the return spring to approach the first frame. The thrust needs to overcome the return force of the return spring and the gravity of the second frame and the components mounted thereon to separate the developing roller and the photosensitive drum. A large thrust is required, and the friction force to be overcome is also large, resulting in high energy consumption and easy to induce fatigue wear. Utility Model Content

[0007] The utility model aims to provide a processing box which can reduce wear.

[0008] To achieve the above-mentioned purpose, the utility model provides a processing box, including a photosensitive drum, a developing roller, a first frame rotatably supporting the photosensitive drum, and a second frame rotatably supporting the developing roller, wherein the rotating axis of the photosensitive drum extends along the width direction of the processing box; the rotating axis of the developing roller extends along the width direction of the processing box; the second frame is movably mounted on the first frame, and can horizontally swing or translate between a first position where the developing roller contacts the photosensitive drum and a second position where the developing roller is separated from the photosensitive drum; a thrust receiving portion is provided on the lower side of the second frame for receiving a thrust for pushing the second frame from the first position to the second position.

[0009] Preferably, along the height direction of the process box, when the second frame is located at the first position, the rotation axis of the photosensitive drum is parallel to the rotation axis of the developing roller and the rotation axis of the developing roller is not higher than the rotation axis of the photosensitive drum.

[0010] Preferably, the rotation axis of the photosensitive drum is parallel to and has the same height as the rotation axis of the developing roller.

[0011] Preferably, the pivot axis around which the second frame swings around the first frame extends along the width direction of the processing box.

[0012] Preferably, a plane swept by the second frame when moving between the first position and the second position is parallel to the thrust direction.

[0013] Preferably, the first end of the second frame is provided with a first limiting portion extending along the width direction, and the second end of the second frame is provided with a second limiting portion extending along the width direction; the first end of the first frame is provided with a first guiding portion extending along the width direction and cooperating with the first limiting portion, and the second end of the first frame is provided with a second guiding portion extending along the width direction and cooperating with the second limiting portion.

[0014] Preferably, the first limiting portion is a plate, the second limiting portion is a column, the first guiding portion is a first through groove, and the second guiding portion is a second through groove; the plate is slidably embedded in the first through groove, and the column is embedded in the second through groove.

[0015] Preferably, the developing box is also provided with a power receiving part for receiving power, the power receiving part includes a power coupling part, a coupling and a power receiving gear, the power coupling part is used to receive power, the two ends of the coupling are respectively connected to the power receiving gear and the power coupling part, and the coupling is a cross slider.

[0016] Preferably, a slotted groove cooperating with the cross slider is provided on a side of the power coupling portion close to the coupling, and a slotted groove cooperating with the cross slider is provided on a side of the power receiving gear close to the coupling.

[0017] With the processing box having the above structure, the thrust does not need to overcome the gravity of the second frame and the components thereon, and a smaller thrust can be used to separate the developing roller from the photosensitive drum. The thrust borne by the thrust receiving part is reduced, and the friction borne by the thrust receiving part is reduced, which is beneficial to extending the life of the processing box. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the processing box of embodiment 1 of the utility model.

[0019] Figure 2It is a three-dimensional diagram of a developing box according to Embodiment 1 of the present utility model.

[0020] Figure 3 It is an exploded schematic diagram of the processing box of Example 1 of the utility model.

[0021] Figure 4 yes Figure 1 In the cross-sectional view at AA, the second frame is in the first position.

[0022] Figure 5 It is a cross-sectional schematic diagram of the processing box when the second frame of Example 1 of the utility model is in the second position.

[0023] Figure 6 It is a three-dimensional diagram of a processing box of Embodiment 2 of the present utility model.

[0024] Figure 7 It is another stereoscopic view of the processing box of embodiment 2 of the utility model.

[0025] Figure 8 It is an exploded schematic diagram of the processing box of Example 2 of the utility model.

[0026] Fig. 9 It is an exploded schematic diagram of the power receiving part and the power receiving gear of Example 2 of the utility model.

[0027] Fig.10 It is a comparative schematic diagram of Embodiment 2 of the utility model before and after the thrust receiving part receives the thrust.

[0028] Fig.11 yes Fig.10 Bottom view of . DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] Example 1

[0031] like Figures 1 to 5 As shown, the process cartridge 100 includes a photosensitive drum 112, a developing roller 122, a first frame 111 rotatably supporting the photosensitive drum 112, and a second frame 121 rotatably supporting the developing roller 122. The rotation axis 113 of the photosensitive drum 112 extends along the width direction 02 of the process cartridge 100, and the rotation axis 123 of the developing roller 122 extends along the width direction 02 of the process cartridge 100.

[0032] The second frame 121 is movably mounted on the first frame 111, and can move between a first position 101 where the developing roller 122 contacts the photosensitive drum 112 and a second position 102 where the developing roller and the photosensitive drum are separated. Along the height direction 03 of the process cartridge 100, when the second frame 121 is located at the first position 101, the rotation axis 113 of the photosensitive drum 112 is parallel to the rotation axis 123 of the developing roller 122, and the rotation axis 123 of the developing roller 122 is not higher than the rotation axis 113 of the photosensitive drum 112; preferably, the rotation axis 113 of the photosensitive drum 112 is parallel to the rotation axis 123 of the developing roller 122 and is at the same height.

[0033] A thrust receiving portion 125 for receiving the thrust 104 for pushing the second frame 121 from the first position 101 to the second position 102 is provided at a lower side of the second frame 121 .

[0034] It can be seen that along the height direction 03 of the process box 100, when the second frame 121 is located at the first position 101, the rotation axis 113 of the photosensitive drum 112 is parallel to the rotation axis 123 of the developing roller 122 and the rotation axis 123 of the developing roller 122 is not higher than the rotation axis 113 of the photosensitive drum 112, and the developing chamber 124 has a larger capacity and can store more toner. Preferably, when viewed along the axial direction of the photosensitive drum 112, the contact point 106 of the developing roller 122 and the photosensitive drum 112 is located on the plane 107 where the rotation axes of the developing roller 122 and the photosensitive drum 112 are located, that is, the contact point 106 is at the same height as the rotation axes of the developing roller 122 and the photosensitive drum 112, and the developing roller 122 presses the photosensitive drum 112 from the front, which is beneficial to improving the life of the coating on the surface of the photosensitive drum 112.

[0035] Preferably, the pivot 108 for the second frame 121 to swing around the first frame 111 extends along the width direction 02 of the processing box 100 .

[0036] The process cartridge 100 includes a drum cartridge 110 and a developing cartridge 120 , the first frame 111 is a part of the drum cartridge 110 , and the second frame 121 is a part of the developing cartridge 120 .

[0037] Along the width direction 02, the first end of the first frame 111 is provided with a through hole 116 extending along the width direction 02, and the second end is provided with a column 117 extending along the width direction 02. Preferably, the through hole 116 is formed on an end cap 118 at the first end of the first frame 111, and the column 117 is formed on an end cap 119 at the second end of the first frame 111. The end cap 118 and the end cap 119 can be relatively fixed to the main body 1111 of the first frame 111 by assembly, welding or bonding, or can be integrally formed with the main body 1111.

[0038] Along the width direction 02 , a cylindrical portion 126 for cooperating with the through hole 116 is provided at a first end of the second frame 121 , and a cylinder 127 for cooperating with the column 117 is provided at a second end of the second frame 121 .

[0039] The electronic imaging device (not shown) is provided with a pushing portion 105 for applying a thrust 104 to the thrust receiving portion 125 .

[0040] After the thrust 104 is removed, the second frame 121 is controlled by the return spring as a return member between the drum box 110 and the developer box 120 to approach the first frame 111 so that the photosensitive drum 112 and the developer roller 122 are kept in contact. The material, shape and installation method of the return member belong to the prior art and will not be described in detail here.

[0041] The second frame 121 is not limited to rotating around the pivot 108 .

[0042] As an improvement, the plane swept by the second frame when moving between the first position and the second position is parallel to the direction of the thrust, which effectively reduces the relative sliding between the pushing portion 105 and the thrust receiving portion 125 in the height direction 03 and reduces friction.

[0043] As an improvement, the second frame 121 swings horizontally or translates horizontally between the first position and the second position, which can effectively reduce the relative sliding between the pushing portion 105 and the thrust receiving portion 125 in the height direction 03 and reduce friction.

[0044] In this embodiment, along the height direction of the process cartridge, when the second frame is located at the first position, the rotation axis of the photosensitive drum is parallel to the rotation axis of the developing roller and the rotation axis of the developing roller is not higher than the rotation axis of the photosensitive drum, and the developing chamber has a larger capacity and can store more toner. Viewed along the axial direction of the photosensitive drum, the contact point between the developing roller and the photosensitive drum is located on the plane where the rotation axes of the developing roller and the photosensitive drum are located, that is, the contact point is at the same height as the rotation axes of the developing roller and the photosensitive drum, and the front of the developing roller presses the photosensitive drum, which is beneficial to increasing the life of the coating on the surface of the photosensitive drum.

[0045] Example 2

[0046] like Figures 6 to 11 As shown, the process cartridge 200 includes a photosensitive drum 212 , a developing roller 222 , a first frame 211 rotatably supporting the photosensitive drum 212 , and a second frame 221 rotatably supporting the developing roller 222 .

[0047] The rotation shaft 213 of the photosensitive drum 212 extends in the width direction 02 of the process cartridge 200 .

[0048] The rotation shaft 223 of the developing roller 222 extends in the width direction 02 of the process cartridge 200 .

[0049] The second frame 221 is movably mounted on the first frame 211 and can swing horizontally between a first position 201 where the developing roller 222 contacts the photosensitive drum 212 and a second position 202 where the developing roller 222 is separated from the photosensitive drum 212 .

[0050] A thrust receiving portion 225 for receiving the thrust 104 for pushing the second frame 221 from the first position 201 to the second position 202 is provided at the lower side of the second frame 221 .

[0051] It can be seen that the thrust 104 does not need to overcome the gravity of the second frame 221 and the components thereon, and a smaller thrust can be used to separate the developing roller 222 from the photosensitive drum 212, and the thrust borne by the thrust receiving portion 225 is reduced, and the friction borne by the thrust receiving portion 225 is reduced, which is beneficial to prolonging the life of the processing box 200. The relative sliding between the pushing portion 105 and the thrust receiving portion 225 in the height direction 03 is effectively reduced, the friction is reduced, and the life of the processing box 200 is extended.

[0052] In other embodiments, the second frame 221 is not limited to horizontally swinging between the first position 201 and the second position 202. By changing the guiding trend of the first through slot 216, the shape and spatial orientation of the swinging surface of the second frame 221 can be changed. For example, the swinging plane of the second frame 221 forms an angle with the horizontal plane. For another example, the swinging surface of the second frame 221 is an arc surface. That is, the second frame 221 is movably mounted on the first frame 211, and can swing between the first position 201 where the developing roller 222 contacts the photosensitive drum 212 and the second position 202 where the developing roller 222 separates from the photosensitive drum 212.

[0053] Preferably, along the height direction 03 of the process cartridge 200, when the second frame 221 is located at the first position 201, the rotation axis 213 of the photosensitive drum 212 is parallel to the rotation axis 223 of the developing roller 222 and the rotation axis 223 of the developing roller 222 is not higher than the rotation axis 213 of the photosensitive drum 212; preferably, the rotation axis 213 of the photosensitive drum 212 is parallel to the rotation axis 223 of the developing roller 222 and the rotation axis 223 of the developing roller 222 is at the same height as the rotation axis 213 of the photosensitive drum 212. This is beneficial to increase the capacity of the developing bin 124 and store more toner. The developing roller 222 presses the photosensitive drum 212 from the front, which is beneficial to increase the life of the coating on the surface of the photosensitive drum 212.

[0054] The process cartridge 200 includes a drum cartridge 210 and a developer cartridge 220 , the first frame 211 is a part of the drum cartridge 210 , and the second frame 221 is a part of the developer cartridge 220 .

[0055] Along the width direction 02, the first end of the second frame 221 is provided with a plate 226 as a first limiting portion extending along the width direction 02, and the second end is provided with a column 227 as a second limiting portion extending along the width direction 02. The first limiting portion is not limited to a plate, but can also be a column, a sphere, or other shapes. The second limiting portion is not limited to a column, but can also be a plate, a sphere, or other shapes.

[0056] Along the width direction 02 , a first through slot 216 as a first guide portion extending along the width direction 02 is provided at a first end of the first frame 211 , and a second through slot 217 as a second guide portion extending along the width direction 02 is provided at a second end.

[0057] The plate body 226 can be slidably embedded in the first through groove 216 serving as a slide groove to prevent the first end of the first frame 211 from moving up and down in the height direction 03.

[0058] Along the width direction 02, the first end of the first frame 211 and the first end of the second frame 221 are respectively installed with a first tension spring 109 as a first reset member through a column 214 and a column 224. The first reset member is not limited to a tension spring but can also be other suitable elastic components such as a torsion spring.

[0059] Along the width direction 02 , the second end of the first frame 211 and the second end of the second frame 221 are connected by a second tension spring (not shown in the figure) as a second reset member. Under the action of the second tension spring, the column 227 abuts against the inner wall 218 of the second through slot 217 .

[0060] When the thrust 104 acts on the thrust receiving portion 225 , the second frame 221 swings horizontally with the contact point between the column 227 and the inner wall 218 as a fulcrum.

[0061] The developing box 220 is provided with a power receiving part 230 for receiving power, including a power coupling part 231 and a coupling 232 respectively connecting a power receiving gear 233 and the power coupling part 231 at both ends. Preferably, the coupling 232 is a cross slider, and a slot 234 cooperating with the cross slider is provided on the side of the power coupling part 231 close to the coupling 232, and a slot 235 cooperating with the cross slider is provided on the side of the power receiving gear 233 close to the coupling 232. The rotation axis of the power receiving gear 233 extends along the width direction 02 and is rotatably mounted on the second frame 221. The rotation axis of the power coupling part 231 extends along the width direction 02 and is rotatably mounted on the first frame 211. Preferably, the power coupling part 231 is cylindrical, and the block 236 and the first through groove 216 serve as a bearing seat of the power coupling part 231. Even if the second frame 221 moves under the thrust 104, the power receiving gear 233 can still continuously obtain power from the power coupling part 231 through the coupling 232. The coupling 232 is not limited to a cross slider coupling, and can also be a flexible coupling or other forms of universal couplings.

[0062] The thrust receiving portion 225 is not limited to one. In other embodiments, a thrust receiving portion 225 is provided at each end of the first frame 211 along the width direction 02. When the thrust receiving portions 225 at both ends simultaneously receive the thrust from the pushing portion of the electronic imaging device, the second frame 221 can translate under the guidance of the first through slot 216 and the second through slot 217.

[0063] As an improvement, the second frame 221 can also be installed on the first frame 211 in a translational manner through a horizontal plane connecting rod (not shown in the figure). Even if the first frame 211 is only provided with a thrust receiving portion 225 at one end along the width direction 02, the second frame 221 can also move in a translational manner.

[0064] In this embodiment, the thrust does not need to overcome the gravity of the second frame and the components thereon, and a smaller thrust can be used to separate the developing roller from the photosensitive drum. The thrust borne by the thrust receiving portion is reduced, and the friction borne by the thrust receiving portion is reduced, which is beneficial to extending the life of the processing box.

[0065] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A process cartridge comprising a photosensitive drum, a developing roller, a first frame rotatably supporting the photosensitive drum, and a second frame rotatably supporting the developing roller, characterized in that: The rotation axis of the photosensitive drum extends along the width direction of the process cartridge; the rotation axis of the developing roller extends along the width direction of the process cartridge; The second frame is movably mounted on the first frame, and can swing horizontally or translate between a first position where the developing roller contacts the photosensitive drum and a second position where the developing roller separates from the photosensitive drum; a thrust receiving portion is provided on the lower side of the second frame for receiving a thrust for pushing the second frame from the first position to the second position.

2. The process cartridge according to claim 1, wherein: Along the height direction of the process cartridge, when the second frame is located at the first position, the rotation axis of the photosensitive drum is parallel to the rotation axis of the developing roller and the rotation axis of the developing roller is not higher than the rotation axis of the photosensitive drum.

3. The process cartridge according to claim 2, wherein: The rotation axis of the photosensitive drum is parallel to and has the same height as the rotation axis of the developing roller.

4. The process cartridge according to claim 1, wherein: A pivot shaft about which the second frame swings the first frame extends in a width direction of the process cartridge.

5. The process cartridge according to claim 1, wherein: A plane swept by the second frame when moving between the first position and the second position is parallel to the thrust direction.

6. The process cartridge according to any one of claims 1 to 5, characterized in that: The first end of the second frame is provided with a first limiting portion extending along the width direction, and the second end of the second frame is provided with a second limiting portion extending along the width direction; the first end of the first frame is provided with a first guiding portion extending along the width direction and cooperating with the first limiting portion, and the second end of the first frame is provided with a second guiding portion extending along the width direction and cooperating with the second limiting portion.

7. The process cartridge according to claim 6, wherein: The first limiting portion is a plate, the second limiting portion is a column, the first guiding portion is a first through slot, and the second guiding portion is a second through slot; the plate is slidably embedded in the first through slot, and the column is embedded in the second through slot.

8. The process cartridge according to claim 7, wherein: The processing box is also provided with a power receiving part for receiving power, and the power receiving part includes a power coupling part, a coupling and a power receiving gear. The power coupling part is used to receive power, and the two ends of the coupling are respectively connected to the power receiving gear and the power coupling part, and the coupling is a cross slider.

9. The process cartridge according to claim 8, wherein: A slotted groove cooperating with the cross slider is provided on a side of the power coupling portion close to the coupling, and a slotted groove cooperating with the cross slider is provided on a side of the power receiving gear close to the coupling.

Images