End seals, developing cartridges and processing cartridges

Abstract

This utility model provides an end seal, a developing cartridge having the end seal, and a processing cartridge having the developing cartridge. The end seal is fixedly disposed on a developing housing on which a developing roller is mounted. The end seal is used to seal between the developing roller and the developing housing. The end seal has intersecting length, width, and thickness directions, with the length direction having the largest dimension. The width direction is parallel to the axial direction of the developing roller. Along the length direction, the end seal has a third end and a fourth end disposed opposite to each other. At least one of the third end and the fourth end is provided with at least one functional portion for preventing developer leakage. The functional portion includes at least a first functional surface, a second functional surface, and a receiving portion formed between the first functional surface and the second functional surface. With this arrangement, the receiving portion can accommodate the entering developer, making it less likely for the developer to leak and reducing the possibility of the developer leaking outside the developing cartridge.

Description

Technical Field

[0001] This utility model relates to the field of electrophotographic imaging technology, and in particular to a processing box that can be detachably installed in an electrophotographic imaging device, a developing box in the processing box, and an end seal in the developing box. Background Technology

[0002] A developer cartridge is a consumable that can be detachably installed into an imaging device. The developer cartridge includes a developer housing and a developer roller detachably installed into the developer housing. The developer housing has a powder hopper for containing developer, and the developer roller carries the developer. The developer cartridge also includes a felt disposed on the developer housing. Along the axial direction of the developer roller, the felt is fixed to both ends of the developer housing. The felt is used to seal the gap between the developer housing and the developer roller to prevent developer from leaking from the gap.

[0003] Because manufacturing errors in the felt and the developing housing are unavoidable, and because the felt is generally formed into a regular cuboid shape, after the felt is installed into the developing housing, the short side of the felt is parallel to the rotation axis of the developing roller, and a gap still exists between the felt and the developing housing. Generally, this gap is sealed by applying glue around the short side of the felt. However, because the materials of the glue and the felt are different, the glue can never penetrate into the felt. After the glue cures, a gap will always exist between the cured glue and the felt. This gap extends along the axial direction of the developing roller. During the transportation of the developing cartridge, or when the developing cartridge is dropped or thrown, the developer may leak from this gap. Utility Model Content

[0004] This utility model provides an end seal, a developing cartridge having the end seal, and a processing cartridge having the developing cartridge, to solve at least one of the above-mentioned technical problems. The specific technical solution is as follows:

[0005] An end seal is fixedly disposed on a developing housing on which a developing roller is mounted. The end seal is used to seal between the developing roller and the developing housing. The end seal has intersecting length, width and thickness directions, with the length direction having the largest dimension. The width direction is parallel to the axial direction of the developing roller. Along the length direction, the end seal has a third end and a fourth end disposed opposite to each other. At least one of the third end and the fourth end is provided with at least one functional part for preventing developer leakage. The functional part includes at least a first functional surface, a second functional surface and a receiving part formed between the first functional surface and the second functional surface.

[0006] The end seal is projected onto a plane perpendicular to the thickness direction along the thickness direction. The end seal is rectangular. In the length direction, the first working surface has a first vertex and the second working surface has a second vertex. In the axial direction of the developing roller, the second working surface is farther from the axial center of the developing roller than the first working surface. Along the length direction, the distance between the second vertex and the fourth end is greater than or equal to the distance between the first vertex and the fourth end.

[0007] The end seal is projected onto a plane perpendicular to the thickness direction along the thickness direction. The third end has a first reference line passing through its end point, and the fourth end has a second reference line passing through its end point. Along the length direction, the first reference line and the second reference line are spaced apart and opposite to each other. At the same time, both the first reference line and the second reference line are parallel to the axial direction of the developing roller. Along the length direction of the end seal, the end point is the point where the third end and the fourth end are furthest apart from each other. The actuating part is configured to be recessed into a groove relative to the first reference line toward the direction closer to the second reference line.

[0008] The projected shape of the functional part is a triangle.

[0009] The projected shape of the functional part is trapezoidal.

[0010] The projected shape of the functional part is fan-shaped.

[0011] The projected shape of the functional part is square.

[0012] When the fourth end is also provided with an action part, the action part provided at the fourth end and the action part provided at the third end are mirror images of each other.

[0013] The developing cartridge includes a developing housing and a developing roller rotatably disposed within the developing housing. The developing roller is used to carry the developer contained in the developing housing. Along the axial direction of the developing roller, both ends of the developing roller are provided with the aforementioned end seals, and the two end seals are arranged in a mirror image.

[0014] The processing cartridge includes a drum cartridge and the aforementioned developing cartridge, which are joined together. The drum cartridge includes a drum housing and a photosensitive drum rotatably disposed within the drum housing. The developing roller and the photosensitive drum are disposed opposite to each other. The developing roller is used to supply developer to the photosensitive drum, thereby developing the electrostatic latent image formed on the surface of the photosensitive drum.

[0015] Compared with the prior art, in the end seal, the developing cartridge with the end seal, and the processing cartridge with the developing cartridge provided by this utility model, the working part includes at least a first working surface, a second working surface, and a receiving part formed between the first working surface and the second working surface. The receiving part can accommodate the developer that enters, making it less likely for the developer to leak and reducing the possibility of the developer leaking outside the developing cartridge. Attached Figure Description

[0016] Figure 1 This is a perspective view of the developing cartridge involved in this utility model.

[0017] Figure 2 This is an exploded view of some components of the developing cartridge involved in this utility model.

[0018] Figure 3 This utility model relates to a developing cartridge, along with... Figure 1 Plan view after sectioning along the AA direction.

[0019] Figure 4 This is a perspective view of the end seal of the developing cartridge involved in this utility model.

[0020] Figure 5 It is a plan view obtained by projecting the first type of end seal of the developing cartridge involved in this utility model onto a plane perpendicular to the thickness direction along the thickness direction of the end seal.

[0021] Figure 6 It is a plan view obtained by projecting the second type of end seal of the developing cartridge involved in this utility model onto a plane perpendicular to the thickness direction along the thickness direction of the end seal.

[0022] Figure 7 It is a plan view obtained by projecting the third type of end seal of the developing cartridge involved in this utility model onto a plane perpendicular to the thickness direction along the thickness direction of the end seal.

[0023] Figure 8 It is a plan view obtained by projecting the fourth type of end seal of the developing cartridge involved in this utility model onto a plane perpendicular to the thickness direction along the thickness direction of the end seal.

[0024] Figure 9 It is a plan view obtained by projecting the fifth type of end seal of the developing cartridge involved in this utility model onto a plane perpendicular to the thickness direction along the thickness direction of the end seal.

[0025] Figure 10 It is a plan view obtained by projecting the sixth type of end seal of the developing cartridge involved in this utility model onto a plane perpendicular to the thickness direction along the thickness direction of the end seal.

[0026] Figure 11 It is a plan view obtained by projecting the seventh type of end seal of the developing cartridge involved in this utility model onto a plane perpendicular to the thickness direction along the thickness direction of the end seal.

[0027] Figure 12 It is a plan view obtained by projecting the eighth type of end seal of the developing cartridge involved in this utility model onto a plane perpendicular to the thickness direction along the thickness direction of the end seal.

[0028] Figure 13 It is a plan view obtained by projecting the ninth type of end seal of the developing cartridge involved in this utility model onto a plane perpendicular to the thickness direction along the thickness direction of the end seal.

[0029] Figure 14 It is a plan view obtained by projecting the tenth type of end seal of the developing cartridge involved in this utility model onto a plane perpendicular to the thickness direction along the thickness direction of the end seal.

[0030] Figure 15 It is a plan view obtained by projecting the eleventh type of end seal of the developing cartridge involved in this utility model onto a plane perpendicular to the thickness direction along the thickness direction of the end seal.

[0031] Figure 16 It is a plan view obtained by projecting the twelfth type of end seal of the developing cartridge involved in this utility model onto a plane perpendicular to the thickness direction along the thickness direction of the end seal.

[0032] Figure 17 and Figure 18 It is a plan view obtained by projecting the first seal of the developing cartridge involved in this utility model onto a plane parallel to the axial direction of the developing roller along a direction perpendicular to the axial direction of the developing roller. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0034] The developing cartridge 100 can be detachably installed into the imaging device, such as... Figure 1 , Figure 2 and Figure 3 As shown, the developing cartridge 100 includes a developing housing 10, a developing roller 20 rotatably disposed in the developing housing 10, and a receiving cavity 30 formed in the developing housing 10 and used at least to contain developer. Specifically, the receiving cavity 30 includes a powder hopper 31 and a developing chamber 32 distributed along a direction perpendicular to the axis of the developing roller 20. The powder hopper 31 is used to contain developer, and the developing chamber 32 is used to contain at least the developing roller 20. The developing roller 20 is used to carry developer.

[0035] The processing cartridge includes a drum box and a developing cartridge 100 that are joined together. The drum box includes a drum housing and a photosensitive drum rotatably disposed within the drum housing. A developing roller 20 is disposed opposite to the photosensitive drum. The developing roller 20 supplies developer to the photosensitive drum, thereby developing the electrostatic latent image formed on the surface of the photosensitive drum. The processing cartridge can be detachably installed into an imaging device. Specifically, the drum box can be integrated into the imaging device, and the developing cartridge 100 can be detachably installed into the drum box / imaging device. Alternatively, the drum box and the developing cartridge 100 can be combined and detachably installed into the imaging device as a whole. For example, the developing cartridge 100 and the drum box can be two separate products. In this case, the developing cartridge 100 needs to be detachably installed into the drum box first, and then the combined unit (processing cartridge) can be detachably installed into the imaging device. Alternatively, the developing cartridge 100 and the drum box need to be combined to form a single product, and then the combined unit can be detachably installed into the imaging device. The drum housing and the developing housing can be formed integrally or separately.

[0036] In some implementations, such as Figure 2 and Figure 3 As shown, the developing chamber 100 is also provided with a powder feeding roller 50 for supplying the developer in the powder hopper 31 to the developing roller 20. The powder feeding roller 50 is installed in the powder hopper 31 or in the developing chamber 32.

[0037] Continue as Figure 2 and Figure 3 As shown, the developing roller 20 includes a developing roller shaft 21 and a developing roller layer 22 located radially outside the developing roller shaft 21. The developing roller shaft 21 is supported by the developing housing 10 and is used to receive driving force from the imaging device to rotate. The developing roller layer 22 is used to carry the developer and rotates together with the developing roller shaft 21. The developing cartridge 100 is also provided with a powder discharge knife 40 for controlling the thickness of the developer on the surface of the developing roller 20 or the surface of the developing roller layer 22.

[0038] The developing housing 10 includes a bottom shell 11 and a top cover 12 joined together in a direction intersecting the axial direction of the developing roller 20. The receiving cavity 30 is formed between the bottom shell 11 and the top cover 12. The bottom shell 11 and the top cover 12 can be joined together in any direction intersecting the axial direction. The bottom shell 11 or the top cover 12 includes a first side plate 111, a second side plate 112, and a third side plate 113. In the axial direction of the developing roller 20, the first side plate 111 and the third side plate 113 are respectively located at both ends of the second side plate 112. Preferably, the first side plate 111, the second side plate 112, and the third side plate 113 are connected. In the axial direction of the developing roller 20, the receiving cavity 30 / developing chamber 32 is located between the first side plate 111 and the third side plate 113.

[0039] The axial direction is parallel to the rotation axis L0 of the developing roller 20.

[0040] In some specific embodiments, the bottom shell 11 and the top cover 12 are joined together in a direction perpendicular to the axial direction of the developing roller 20.

[0041] like Figure 1 , Figure 2 and Figure 3 As shown, the developing cartridge 100 also includes a sealing assembly 60 for sealing the gap between the developing roller 20 / developing roller layer 22 and the developing housing 10. The sealing assembly 60 can prevent developer from leaking from the developing chamber 32. The sealing assembly 60 includes a first seal 61 and a second seal 62 disposed on the developing housing 10. At least a portion of the first seal 61 is covered by the powder discharge blade 40 to seal between the powder discharge blade 40 and the developing housing 10. The second seal 62 is used to seal the gap between the developing roller 20 and the developing housing 10 to prevent developer leakage. The first seal 61 and the second seal 62 are spaced apart along a direction perpendicular to the axial direction of the developing roller 20. Compared with the second seal 62, the first seal 61 is closer to the powder hopper 31. Specifically, for example, the first seal 61 is a sponge and the second seal 62 is a sealing scraper.

[0042] like Figure 2 and Figure 4 As shown, the sealing assembly 60 also includes at least one of two end seals 63 disposed on the developing housing 10 / bottom housing 11. That is, the developing housing 10 / bottom housing 11 is provided with a structure for matching the end seal 63. The two end seals 63 are spaced apart along the axial direction of the developing roller 20 and are mirror images of each other. Specifically, one end seal 63 is disposed on the first side plate 111 and the other end seal 63 is disposed on the third side plate 113. Both the first side plate 111 and the third side plate 113 are provided with mounting surfaces 111a for mounting the end seals 63.

[0043] Along the thickness direction of the end seal 63, the end seal 63 has a mounting surface 631 and a contact surface 632 that are disposed opposite to each other. The mounting surface 631 and the mounting surface 111a are combined with each other. The specific combination method can be, for example, bonding, welding, snap-fitting, magnetic connection, etc. The contact surface 632 is used to contact the surface of the developing roller layer 22 and be squeezed by the developing roller 20 to prevent developer leakage.

[0044] The end seal 63 is generally cuboid in shape, having intersecting length, width (i.e., axial) and thickness directions. Preferably, the length, width, and thickness directions are perpendicular to each other. Generally, the end seal 63 has the largest dimension in the length direction. In the axial direction of the developing roller 20, the end seal 63 has a first end 633 and a second end 634 disposed opposite to each other, and the first end 633 is farther from the axial center P of the developing roller 20 than the second end 634. In the length direction, the end seal 63 has a third end 635 and a fourth end 636 opposite to each other, and the third end 635 is farther from the powder hopper 32 than the fourth end 636 in the direction perpendicular to the axial direction of the developing roller 20.

[0045] In some embodiments, in the arrangement direction of the first seal 61 and the second seal 62, the third end 635 is closer to the second seal 62, and the fourth end 636 is closer to the first seal 61.

[0046] like Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 , Figure 15 and Figure 16 As shown, the end seal 63 is viewed along the thickness direction, or the seal 63 is projected onto a plane W perpendicular to the thickness direction. The end seal 63 is generally rectangular. Along the axial direction, the end seal 63 has two spaced-apart opposing long sides 637. The third end 635 has a first reference line 635a passing through its end point (vertex) N, and the fourth end 636 has a second reference line 636a passing through its end point (vertex) K. Along the extension direction of the long side 637, the first reference line 635a and the second reference line 636a are spaced-apart opposing each other. At the same time, both the first reference line 635a and the second reference line 636a are parallel to the axial direction of the developing roller.

[0047] It should be noted that the long side 637 can be formed as a continuous line segment or a discontinuous line segment. However, in general, in the pattern formed by projecting the seal 63 along the thickness direction, the line connecting the two end points in the pattern in the direction perpendicular to the axial direction is the long side 637 or parallel to the long side 637, which is parallel to the length direction. Along the length direction of the end seal 63, the end point (vertices) refers to the point where the third end 635 and the fourth end 636 are furthest apart from each other.

[0048] In some embodiments, the end seal 63 is made of felt.

[0049] like Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 , Figure 15 and Figure 16 As shown, at least one of the third end 635 and the fourth end 636 is provided with at least one functional portion 66 for preventing developer leakage. The functional portion 66 includes at least a first functional surface 661, a second functional surface 662, and a receiving portion 663 formed between the first functional surface 661 and the second functional surface 662. In the axial direction of the developing roller 20, compared with the first functional surface 661, the second functional surface 661 is closer to the first end 633, and compared with the second functional surface 662, the first functional surface 661 is closer to the second end 634. That is, along the axial direction of the developing roller 20, the first functional surface 661 is closer to the axial center P of the developing roller 20 than the second functional surface 662.

[0050] like Figure 5As shown, the functional part 66 is configured as a groove recessed towards the second reference line 636a relative to the first reference line 635a. In the length direction, the first functional surface 661 has a first vertex M, and the second functional surface 662 has a second vertex N. The functional part 66 is formed as a triangle composed of the line connecting the first vertex M and the second vertex N, the projection line of the first functional surface 661, and the projection line of the second functional surface 662. In the axial direction of the developing roller 20, compared with the first vertex M of the first functional surface 661, the second vertex N of the second functional surface 662 is farther from the projection of the axial center P of the developing roller 20 in the plane W. Along the length direction, the distance between the second vertex N of the third end 635 and the fourth end 636 is greater than or equal to the distance between the first vertex M of the third end 635 and the fourth end 636. Specifically, along the length direction of the end seal 63, the distance from the second vertex N to the second reference line 635a is greater than or equal to the distance from the first vertex M to the second reference line 635a.

[0051] More specifically, such as Figure 5 As shown, the end seal 63 is projected onto a plane W perpendicular to the thickness direction along the thickness direction. Both the first working surface 661 and the second working surface 662 are inclined relative to the axial direction of the developing roller 20. At this time, even if the adhesive enters the receiving part 663, there is still a gap between the adhesive and the end seal 63. The extension direction of the gap between the cured adhesive Q and the first working surface 661 and the extension direction of the gap between the cured adhesive Q and the second working surface 662 are not parallel to the axial direction of the developing roller 20. That is to say, the extension direction of the gap formed between the cured adhesive Q and the inner wall of the groove is not parallel to the axial direction of the developing roller 20.

[0052] like Figure 6 As shown, the end seal 63 is projected onto a plane W perpendicular to the thickness direction along the thickness direction. In the length direction, the projection line of the first working surface 661 is longer than the projection line of the second working surface 662, but it still satisfies that, along the axial direction of the developing roller 20, the second vertex N is farther from the projection of the first vertex M at the axial center P of the developing roller 20 onto the plane W than the projection of the first vertex M onto the plane W. Furthermore, along the length direction, the distance from the second vertex N to the fourth end 636 is greater than or equal to the distance from the first vertex M to the fourth end 636. The working part 66 is formed as a triangle composed of the line connecting the first vertex M and the second vertex N, the projection line of the first working surface 661, and the projection line of the second working surface 662.

[0053] For ease of description, the following definitions apply: Along the axial direction of the developing roller 20, the side of the end seal 63 facing the projection of the axial center P of the developing roller 20 into the plane W (the side where the second end 634 is located) is the inner side, and the side opposite to the inner side (the side where the first end 633 is located) is the outer side. The position of the first vertex M can be on the inner long side 637, or it can be further away from the projection of the axial center P of the developing roller 20 into the plane W than the inner long side 637. The position of the second vertex N can be on the outer long side 637, or it can be closer to / further away from the projection of the axial center P of the developing roller 20 into the plane W than the outer long side 637.

[0054] like Figure 7 As shown, the end seal 63 is projected along the thickness direction onto a plane W perpendicular to the thickness direction. The working part 66 is formed into a fan shape consisting of the line connecting the first vertex M and the second vertex N, the projection line of the first working surface 661, and the projection line of the second working surface 662. The projection lines of the first working surface 661 and the second working surface 662 are both arcs, but they still satisfy the following: along the axial direction of the developing roller 20, the second vertex N is farther from the projection of the axial center P of the developing roller 20 onto the plane W than the first vertex M, and along the length direction, the distance from the second vertex N to the fourth end 636 is greater than or equal to the distance from the first vertex M to the fourth end 636.

[0055] In some embodiments, the projection lines of the first working surface 661 and the second working surface 662 may be formed such that one is an arc and the other is a straight line.

[0056] like Figure 8 As shown, the end seal 63 is provided with a plurality of working parts 66. The end seal 63 is projected onto a plane W perpendicular to the thickness direction along the thickness direction. The plurality of working parts 66 form a sawtooth shape. Each working part 66 is still formed as a triangle or other shape described in this application, which is formed by the line connecting the first vertex M and the second vertex N, the projection line of the first working surface 661, and the projection line of the second working surface 662. However, it still satisfies that, along the axial direction of the developing roller 20, the second vertex N is farther from the projection of the axial center P of the developing roller 20 onto the plane W than the first vertex M, and along the length direction, the distance from the second vertex N to the fourth end 636 is greater than or equal to the distance from the first vertex M to the fourth end 636.

[0057] exist Figure 8 In the end seal 63 shown, since multiple working parts 66 are provided at the third end 635, the difficulty of developer leakage can be further increased, thereby further improving the sealing effect of the end seal 63.

[0058] like Figure 9 As shown, the action part 66 further includes a third action surface 664. Along the axial direction of the developing roller 20, the third action surface 664 is located between the first action surface 661 and the second action surface 662. Along the thickness direction, the end seal 63 is projected onto a plane W perpendicular to the thickness direction. The action part 66 is formed as a trapezoid composed of the line connecting the first vertex M and the second vertex N, the projection line of the first action surface 661, the projection line of the second action surface 662, and the projection line of the third action surface 664. However, it still satisfies that, along the axial direction of the developing roller 20, the second vertex N is farther from the projection of the axial center P of the developing roller 20 onto the plane W than the first vertex M, and along the length direction, the distance from the second vertex N to the fourth end 636 is greater than or equal to the distance from the first vertex M to the fourth end 636.

[0059] like Figure 10 As shown, the end seal 63 is projected onto a plane W perpendicular to the thickness direction along the thickness direction. The working part 66 is formed as a triangle consisting of the line connecting the first vertex M and the second vertex N, the projection line of the first working surface 661, and the projection line of the second working surface 662. However, it still satisfies that, along the axial direction of the developing roller 20, the second vertex N is farther from the projection of the axial center P of the developing roller 20 onto the plane W than the first vertex M, and along the length direction, the distance from the second vertex N to the fourth end 636 is greater than or equal to the distance from the first vertex M to the fourth end 636. At this time, along the axial direction of the developing roller 20, the position of the first vertex M is farther from the projection of the axial center P of the developing roller 20 onto the plane W than the inner long side 637.

[0060] like Figure 11 As shown, the end seal 63 is projected onto a plane W perpendicular to the thickness direction along the thickness direction. The first vertex M is located on the inner long side 637. The working part 66 is formed as a right triangle consisting of the line connecting the first vertex M and the second vertex N, the first reference line 635a, and a straight line passing through the first vertex M and coinciding with or parallel to the inner long side 637. At this time, the projection line of the first working surface 661 is simplified to the first vertex M. The line connecting the first vertex M and the second vertex N forms the projection line of the second working surface 662. It still satisfies that, along the axial direction of the developing roller 20, the second vertex N is farther from the projection of the axial middle part P of the developing roller 20 into the plane W than the first vertex M, and along the length direction, the distance from the second vertex N to the fourth end 636 is greater than or equal to the distance from the first vertex M to the fourth end 636.

[0061] like Figure 12As shown, the end seal 63 is projected onto a plane W perpendicular to the thickness direction along the thickness direction. The working part 66 is formed as a right triangle consisting of the line connecting the first vertex M and the second vertex N, the first reference line 635a, and a straight line passing through the first vertex M and coinciding with or parallel to the inner long side 637. At this time, the projection line of the first working surface 661 is simplified to the first vertex M, and the line connecting the first vertex M and the second vertex N forms the projection line of the second working surface 662. It still satisfies that, along the axial direction of the developing roller 20, the second vertex N is farther from the projection of the axial center P of the developing roller 20 onto the plane W than the first vertex M, and along the length direction, the distance from the second vertex N to the fourth end 636 is greater than or equal to the distance from the first vertex M to the fourth end 636. Figure 11 The difference is that, along the axial direction of the developing roller 20, the position of the second vertex N is... Figure 11 The position of the second vertex N is closer to the projection of the axial center P of the developing roller 20 onto the plane W. As a result, the area opposite the receiving portion 663 of the end seal 63 is larger along the axial direction, which can more effectively prevent developer leakage.

[0062] like Figure 13 As shown, the end seal 63 is projected along the thickness direction onto a plane W perpendicular to the thickness direction. The functional part 66 is formed as a trapezoid consisting of the projection lines of the first functional surface 661, the projection lines of the second functional surface 662, the first reference line 635a, and a straight line passing through the first vertex M and coinciding with or parallel to the inner long side 637. It still satisfies the following: along the axial direction of the developing roller 20, the second vertex N is farther from the projection of the axial center P of the developing roller 20 onto the plane W than the first vertex M. Furthermore, along the length direction, the distance from the second vertex N to the fourth end 636 is greater than or equal to the distance from the first vertex M to the fourth end 636. Therefore, along the axial direction, the area opposite the receiving portion 663 of the end seal 63 is larger, more effectively preventing developer leakage. Figure 12 The difference is that the projection line of the first working surface 661 is a line segment parallel to the axial direction of the developing roller 20.

[0063] like Figure 14As shown, the end seal 63 is projected along the thickness direction onto a plane W perpendicular to the thickness direction. The working part 66 is formed as a triangle consisting of the line connecting the first vertex M and the second vertex N, a straight line passing through the second vertex N and perpendicular to the axial direction, and a straight line passing through the first vertex M and parallel to the first reference line 635a. At this time, the projection line of the first working surface 661 is simplified to the first vertex M, and the line connecting the first vertex M and the second vertex N forms the projection line of the second working surface 662. It still satisfies that, along the axial direction of the developing roller 20, the second vertex N is greater than the first vertex M. The vertex M is closer to the projection of the axial center P of the developing roller 20 in the plane W, and along the length direction, the distance from the second vertex N to the fourth end 636 is greater than or equal to the distance from the first vertex M to the fourth end 636. Therefore, along the axial direction, the area opposite the receiving portion 663 of the end seal 63 is larger, which can more effectively prevent developer leakage. Along the axial direction of the developing roller 20, the position of the second vertex N is closer to the projection of the axial center P of the developing roller 20 in the plane W than the inner long side 637 / outer long side 637.

[0064] like Figure 15 As shown, the end seal 63 is provided with a plurality of working parts 66. The end seal 63 is projected onto a plane W perpendicular to the thickness direction along the thickness direction. Each working part 66 is formed as a triangle consisting of the line connecting the first vertex M and the second vertex N, the first reference line 635a, and a straight line passing through the first vertex M and coinciding with or parallel to the inner long side 637. At this time, the projection line of the first working surface 661 is simplified to the first vertex M. The line connecting the first vertex M and the second vertex N forms the projection line of the second working surface 662. It still satisfies that, along the axial direction of the developing roller 20, the second vertex N is farther from the projection of the axial center P of the developing roller 20 into the plane W than the first vertex M, and along the length direction, the distance from the second vertex N to the fourth end 636 is greater than or equal to the distance from the first vertex M to the fourth end 636.

[0065] The working part 66 is configured as a notch groove with the notch direction facing the axial center P of the developing roller 20.

[0066] like Figure 13 and Figure 16As shown, the end seal 63 is projected along the thickness direction onto a plane W perpendicular to the thickness direction. The projection line of the first working surface 661 is parallel to the axial direction of the developing roller 20, while the projection line of the second working surface 662 is not parallel to the axial direction of the developing roller 20. The overall projection of the working part 66 is square or trapezoidal. The extension direction of the gap between the cured adhesive Q and the first working surface 661 is parallel to the axial direction of the developing roller 20, while the extension direction of the gap between the cured adhesive Q and the second working surface 662 is not parallel to the axial direction of the developing roller 20.

[0067] like Figure 16 As shown, the end seal 63 is projected onto a plane W perpendicular to the thickness direction along the thickness direction. The projection line of the first working surface 661 is parallel to the axial direction of the developing roller 20, and the projection line of the second working surface 662 is perpendicular to the axial direction of the developing roller 20. That is, the working part 66 is formed into a square by the projection lines of the first working surface 661, the projection lines of the second working surface 662, the first reference line 635a, and a straight line passing through the first vertex M and coinciding with or parallel to the inner long side 637. It still satisfies that, along the axial direction of the developing roller 20, the second vertex N is farther from the projection of the axial center P of the developing roller 20 onto the plane W than the first vertex M, and along the length direction, the distance from the second vertex N to the fourth end 636 is greater than or equal to the distance from the first vertex M to the fourth end 636. Therefore, along the axial direction, the area size opposite to the receiving part 663 of the end seal 63 is larger, which can more effectively prevent developer leakage.

[0068] The shape of the functional part 66 of the end seal 63 provided by this utility model is not limited to the various situations listed above. As long as the distance from the second vertex N to the fourth end 636 along the length direction is greater than or equal to the distance from the first vertex M to the fourth end 636, it is acceptable.

[0069] When the gap between the end seal 63 and the developing housing 10 / bottom shell 11 is sealed with adhesive, the adhesive will enter the receiving part 663. After the adhesive cures, gaps may be formed between the adhesive and the first working surface 661, as well as between the adhesive and the second working surface 662. The developer can enter the gaps. However, because at least the second working surface 662 has a certain slope, the developer needs to overcome its own weight and pass over the second working surface 662 / second vertex N to leak out of the developing cartridge 100 / developing chamber 32. That is, when the developer enters the gap, the movement path of the developer is blocked by the cured adhesive Q. Along the axial direction of the developing roller 20, the flow path of the developer to the outside of the developing cartridge 100 is blocked. Furthermore, the receiving part 633 can also contain the developer. Even further, at least the second working surface 662 can also block the developer. In some specific embodiments, the adhesive can be glue.

[0070] In some specific implementations, as shown in Figure 11, Figure 12 , Figure 13 , Figure 14 , Figure 15 and Figure 16 As shown, the third end 635 also has a third reference line 635b parallel to the first reference line 635a. The third reference line 635b is a straight line passing through the first vertex M of the first working surface 661. The end seal 63 is provided with a protrusion 645 extending in a direction away from the second reference line 636a relative to the third reference line 635b. Along the extension direction of the protrusion 645, the dimension of the end of the protrusion 645 near the third reference line 635b in the axial direction of the developing roller 20 is greater than the dimension of the other end of the protrusion 645 away from the third reference line 635b in the axial direction of the developing roller 20. The first working surface 661 is located on the inner long side 637, or is larger than the inner long side 637. The projection of the axial center P of the developing roller 20 away from the developing roller 20 in the plane W, the second working surface 662 is configured to point from the second end 634 to the first end 633 along the axial direction of the developing roller 20, the distance from the second working surface 662 to the fourth end 636 is a fixed value or gradually increases, or the distance from the second working surface 662 to the second reference line 636a is a fixed value or gradually increases; along the axial direction of the developing roller 20, the working part 66 is formed on the side of the protrusion 645 near the projection of the axial center P of the developing roller 20 in the plane W. In these embodiments, adhesive sealing may not be used, and developer leakage may be prevented by the protrusion 645 / second working surface 662.

[0071] In some embodiments, when the end seal 63 is provided with a plurality of protrusions 645, the actuating part 66 is formed on the side of the protrusion 645 closest to the projection of the axial center P of the developing roller 20 in the plane W in the axial direction of the developing roller 20.

[0072] In some specific implementation methods, such as Figure 14 As shown, along the axial direction of the developing roller 20, the length of the side L1 of the projection of the protrusion 645 near the axial center P of the developing roller 20 in the plane W is less than the length of the side L2 of the projection of the protrusion 645 away from the axial center P of the developing roller 20 in the plane W. In the axial direction of the developing roller 20, along the direction from the first end 633 to the second end 634, the angle α formed between the side L2 of the projection of the protrusion 645 away from the axial center P of the developing roller 20 in the plane W and the axial direction of the developing roller 20 is less than the angle β formed between the side L1 of the projection of the protrusion 645 near the axial center P of the developing roller 20 in the plane W and the axial direction of the developing roller 20.

[0073] In some embodiments, the fourth end 636 of the end seal 63 is also provided with any of the above-mentioned functional portions 66 to further improve the sealing performance of the axial end of the developing roller 20.

[0074] In some specific embodiments, the functional portion 66 provided at the third end 635 and the functional portion 66 provided at the fourth end 636 are mirror images of each other.

[0075] Based on the inventive concept of this utility model, the technical effect of this application can also be achieved by only providing the receiving part 663 in the end seal 63.

[0076] In some implementations, such as Figure 17 and Figure 18 As shown, the first sealing member 61 has a left end portion 611 and a right end portion 612 spaced apart and opposite to each other along the axial direction of the developing roller 20. The sealing assembly 60 further includes a mating portion 65 configured as a notch or groove. The mating portion 65 is disposed at the left end portion 611 and the right end portion 612 of the first sealing member 61, or at the fourth end portion 636 of the end sealing member 63. Specifically, as shown... Figure 17 and Figure 18As shown, when the mating part 65 is provided at the left end 611 and the right end 612, the mating part 65 is used to accommodate a portion of the fourth end 636. When the mating part 65 is provided at the fourth end 636, the mating part 65 is used to accommodate a portion of the left end 611 and a portion of the left end 611. With this arrangement, developer can be prevented from leaking from the gap between the fourth end 636 and the left end 611 and from the gap between the fourth end 636 and the right end 612.

[0077] [Beneficial Effects]

[0078] Compared with the prior art, the end seal 63, the developing cartridge 100 having the end seal 63, and the processing cartridge having the developing cartridge 100 provided by this utility model have the following beneficial effects:

[0079] Firstly, the end seal 63 is projected along the thickness direction into a plane W perpendicular to the thickness direction. Along the length direction of the end seal 63, in the action portion 66 at one end of the end seal 63, the second vertex N of the second action surface 662, which is further away from the projection of the axial center P of the developing roller 20 in the plane W in the axial direction of the developing roller 20, is further away from the other end of the end seal 63 than the first vertex M of the first action surface 661, which is closer to the projection of the axial center P of the developing roller 20 in the plane W. With this arrangement, the developer must at least overcome its own gravity and pass over the second action surface 662 / second vertex N to leak from the receiving portion 633 to the outside of the developing cartridge 100 / developing chamber 32, reducing the possibility of developer leaking to the outside of the developing cartridge 100.

[0080] Secondly, the functional part 66 includes at least a first functional surface 661, a second functional surface 662, and a receiving part 663 formed between the first functional surface 661 and the second functional surface 662. The receiving part 663 can accommodate the developer that enters, so that the developer is not easily leaked.

[0081] Thirdly, when the gap between the end seal 63 and the developing housing 10 is sealed with adhesive, the adhesive enters the receiving part 663. After the adhesive is cured, the developer moves along a path parallel to the axial direction of the developing roller 20 and is blocked by the end seal 63 or the cured adhesive Q, further reducing the possibility of the developer leaking outside the developing cartridge 100.

[0082] Fourthly, the end seal 63 is provided with a protrusion 645 extending in a direction away from the second reference line 636a relative to the first reference line 635a. Along the axial direction of the developing roller 20, the actuating part 66 is formed on the side of the protrusion 645 near the projection of the axial center P of the developing roller 20 into the plane W. With this configuration, the end seal 63 can be sealed without adhesive, which prevents developer leakage and reduces the cost of the developing cartridge 100.

Claims

1. An end seal, fixedly disposed on a developing housing on which a developing roller is mounted, the end seal being used to seal the space between the developing roller and the developing housing, the end seal having intersecting length, width, and thickness directions, the length direction having the largest dimension, and the width direction being parallel to the axial direction of the developing roller, characterized in that... Along its length, the end seal has a third end and a fourth end disposed opposite to each other, at least one of the third end and the fourth end being provided with at least one functional portion for preventing developer leakage, the functional portion including at least a first functional surface, a second functional surface, and a receiving portion formed between the first functional surface and the second functional surface.

2. The end seal according to claim 1, characterized in that, The end seal is projected along the thickness direction into a plane perpendicular to the thickness direction. The end seal is rectangular. In the length direction, the first working surface has a first vertex and the second working surface has a second vertex. In the axial direction of the developing roller, the second working surface is farther from the axial center of the developing roller than the first working surface. Along the length direction, the distance between the second vertex and the fourth end is greater than or equal to the distance between the first vertex and the fourth end.

3. The end seal according to claim 1, characterized in that, The end seal is projected onto a plane perpendicular to the thickness direction along the thickness direction. The third end has a first reference line passing through its end point, and the fourth end has a second reference line passing through its end point. Along the length direction, the first reference line and the second reference line are spaced apart and opposite to each other. At the same time, both the first reference line and the second reference line are parallel to the axial direction of the developing roller. Along the length of the end seal, the end point is the point where the third end and the fourth end are furthest apart from each other; the actuating part is configured to be recessed into a groove relative to the first reference line toward the direction of the second reference line.

4. The end seal according to claim 3, characterized in that, The projected shape of the functional part is a triangle.

5. The end seal according to claim 3, characterized in that, The projected shape of the functional part is trapezoidal.

6. The end seal according to claim 3, characterized in that, The projected shape of the functional part is fan-shaped.

7. The end seal according to claim 3, characterized in that, The projected shape of the functional part is square.

8. The end seal according to any one of claims 1-7, characterized in that, When the fourth end is also provided with an active part, the active part provided at the fourth end and the active part provided at the third end are mirror images of each other.

9. A developing cartridge, characterized in that, The invention includes a developing housing and a developing roller rotatably disposed within the developing housing. The developing roller is used to carry developer contained within the developing housing. Along the axial direction of the developing roller, both ends of the developing roller are provided with end seals as described in any one of claims 1 to 8, and the two end seals are arranged in a mirror image.

10. A processing box, characterized in that, The device includes a drum housing and a developing cartridge as described in claim 9, the drum housing comprising a drum housing and a photosensitive drum rotatably disposed within the drum housing, a developing roller and the photosensitive drum being disposed opposite each other, the developing roller being used to supply developer to the photosensitive drum, thereby developing an electrostatic latent image formed on the surface of the photosensitive drum.

Images