Developing cartridge

Abstract

The utility model relates to a developing box detachably mounted in imaging equipment, which comprises a shell, a toner cartridge, a toner cartridge cover and a toner cartridge cover, a developing roller; in the longitudinal direction, the end, provided with the driving force receiving piece, of the driving force receiving piece is the left end, and the end opposite to the left end is the right end; the doctor blade is fixedly mounted on the shell through a fixing part arranged in the doctor blade, and the fixing part comprises a left fixing part and a right fixing part; the screw holes comprise a left screw hole opposite to the left fixing part and a right screw hole opposite to the right fixing part, the center line of the left screw hole is a first center line, and the center line of the right screw hole is a second center line; the flow-out opening comprises a left flow-out opening and a right flow-out opening which face the inner side, the left flow-out opening and the right flow-out opening are formed in the two longitudinal ends of the shell respectively, and the inner side is the side, facing the carbon powder containing cavity, of the shell; in the longitudinal direction, the left flow outlet and the right flow outlet are located between the first center line and the second center line; the design is beneficial for reducing carbon powder consumption.

Description

Technical Field

[0001] This utility model relates to the field of electrophotographic imaging, and more particularly to a developing cartridge that can be detachably installed in an electrophotographic imaging device. Background Technology

[0002] The developing roller is the toner carrier in the developing cartridge. When the developing cartridge is imaging, the developing roller carries toner on its surface and supplies the toner to the photosensitive drum on which the electrostatic latent image is formed, so that the electrostatic latent image is developed.

[0003] Generally, to ensure that the edges of the imaging medium can also be effectively developed, the length of the area of ​​the developing roller used to carry toner is set to be greater than the width of the imaging medium. Therefore, the surface of the developing roller can be divided into a toner-carrying area and a toner-non-carrying area, and the toner-carrying area can be further divided into a toner-carrying area and a non-toner-carrying area.

[0004] The length of the toner-carrying area corresponds to the width of the imaging area of ​​the imaging medium. Therefore, during the imaging process in the developing chamber, the toner carried in the toner-carrying area can be transferred to the surface of the photosensitive drum. However, since the non-toner-carrying area also carries toner, although this part of the toner does not directly participate in the development, under the action of the electric field force between the developing roller and the photosensitive drum, a small amount of toner from the non-toner-carrying area will still reach the surface of the photosensitive drum and be cleaned up as waste toner. Finally, the toner consumption of the developing chamber increases. Utility Model Content

[0005] Therefore, the present invention adopts the following technical solution to solve the above-mentioned technical problems, specifically:

[0006] A developing cartridge, detachably mounted to an imaging device, includes: a housing having a toner receiving cavity for holding toner; a developing roller rotatably disposed within the housing for carrying toner, including a developing roller shaft and a developing layer covering the developing roller shaft, the developing roller rotating along a rotation axis parallel to the longitudinal direction; a driving force receiver for receiving driving force from the imaging device, the developing roller being driven to rotate by the driving force from the driving force receiver, the end with the driving force receiver being the left end and the end opposite the left end being the right end along the longitudinal direction; and a toner dispensing blade, fixedly mounted on the housing by a fixing part therein, for adjusting the toner on the surface of the developing layer. The layer thickness, the fixing part includes a left fixing part disposed at the left end and a right fixing part disposed at the right end; screw holes for accommodating screws, including a left screw hole opposite to the left fixing part and a right screw hole opposite to the right fixing part, the center line of the left screw hole is the first center line LL, and the center line of the right screw hole is the second center line LR; outlet for allowing sealant to flow out, including a left outlet and a right outlet facing inward, the left outlet and the right outlet are respectively disposed at both ends of the housing in the longitudinal direction, the inner side being the side of the housing facing the toner receiving cavity; in the longitudinal direction, the left outlet and the right outlet are located between the first center line LL and the second center line LR.

[0007] Furthermore, the developing cartridge also includes a left seal for sealing the left end of the developing roller and a right seal for sealing the right end of the developing roller; the left seal and the right seal are located between the first center line LL and the second center line LR in the longitudinal direction.

[0008] Furthermore, the left seal has a first surface and a second surface spaced apart in the longitudinal direction and a first end located between them, and the right seal has a third surface and a fourth surface spaced apart in the longitudinal direction and a second end located between them; the first end is at least partially opposite to the left outlet; and the second end is at least partially opposite to the right outlet.

[0009] Furthermore, the developing cartridge also includes a left protrusion and a right protrusion disposed on the housing. The left protrusion is located to the left of the left seal and is used to limit the left seal. The right protrusion is located to the right of the right seal and is used to limit the right seal.

[0010] Furthermore, the developing layer includes a toner-bearing area for carrying toner; along the longitudinal direction, the left seal has a first surface near the right end of the housing, and the right seal has a third surface near the left end of the housing, and when both the left and right seals are installed on the housing, the first and third surfaces are opposite to each other; along the longitudinal direction, the distance between the first and third surfaces is the size of the toner-bearing area; the size of the toner-bearing area is set to 216mm-219.5mm.

[0011] Furthermore, the size of the toner-bearing area is 218mm-219mm.

[0012] Furthermore, along the direction intersecting the longitudinal direction, a left mounting surface for installing a left seal is provided between the left outlet and the left screw hole, and a right mounting surface for installing a right seal is provided between the right outlet and the right screw hole. The first surface of the left seal is flush with the rightmost left edge of the left mounting surface; the third surface of the right seal is flush with the leftmost right edge of the right mounting surface.

[0013] Furthermore, the developing cartridge also includes a first seal and a third seal installed on the housing, as well as a left protrusion and a right protrusion disposed on the housing; the first seal is used to contact the outer circumferential surface of the developing layer to prevent toner leakage between the developing roller and the housing; the third seal is disposed between the housing and the toner discharge blade to prevent toner leakage between the housing and the toner discharge blade; the left protrusion is located to the left of the left outlet, and the right protrusion is located to the right of the right outlet; the first seal is supported by the left protrusion and the right protrusion.

[0014] Furthermore, along the longitudinal direction, the developing cartridge also includes a first support and a second support that are spaced apart from each other at both ends of the housing, and both the first support and the second support are fixedly connected to the housing; along the longitudinal direction, a left receiving space is formed between the left seal and the first support, and a right receiving space is formed between the right seal and the second support, and the left receiving space and the right receiving space are used to receive toner leaking from both ends of the developing roller in the longitudinal direction.

[0015] Furthermore, along the longitudinal direction, the developing cartridge also includes a first bracket and a second bracket that are spaced apart from each other at both ends of the housing, and both the first bracket and the second bracket are fixedly connected to the housing; along the longitudinal direction, the developing roller is supported by the first bracket, the left seal, the right seal and the second bracket; the first bracket and the second bracket are used to support the developing roller shaft, and the left seal and the right seal are used to support the developing layer.

[0016] Furthermore, the housing includes a first sidewall and a second sidewall that are spaced apart from each other in the longitudinal direction. The first sidewall is provided with a first through hole, and the second sidewall is provided with a second through hole. The size of one of the first through hole and the second through hole is larger than the size of the other. The through hole with the larger size is used to allow the powder feeding roller to be installed, and the through hole with the smaller size is used to allow the powder feeding roller shaft to pass through. Attached Figure Description

[0017] Figure 1 This is a perspective view of the developing cartridge involved in this utility model.

[0018] Figure 2 It is along Figure 1 A cross-sectional view taken along the AA direction.

[0019] Figure 3 This is an exploded view of some components of the developing cartridge involved in this utility model.

[0020] Figure 4 This is an exploded view of the powder feeding roller and the bottom shell after separation, which are related to this utility model.

[0021] Figure 5 This is an exploded view of the end seal and the bottom shell of the present invention after separation.

[0022] Figure 6A This is a partial enlarged view of the two ends of the bottom shell involved in this utility model.

[0023] Figure 6B yes Figure 5 A schematic diagram showing the relative positions of the middle components after they are projected onto plane M.

[0024] Figure 7 This is a cross-sectional view of the developing cartridge involved in this utility model after being cut by a plane passing through the rotation axis of the developing roller and the rotation axis of the powder feeding roller.

[0025] Figure 8 This is a partially enlarged view of a longitudinal end of the developing cartridge involved in this utility model.

[0026] Figure 9 It is along Figure 8 A sectional view cut along the BB direction. Detailed Implementation

[0027] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The developing cartridge 100 of the present invention can be detachably installed into an imaging device.

[0028] Figure 1 This is a perspective view of the developing cartridge involved in this utility model; Figure 2 It is along Figure 1 A sectional view cut along the AA direction; Figure 3This is an exploded view of some components of the developing cartridge involved in this utility model; Figure 3 This is an exploded view of some components of the developing cartridge involved in this utility model; Figure 4 This is an exploded view of the powder feeding roller and the bottom shell after separation, which are related to this utility model; Figure 5 This is an exploded view of the end seal and the bottom shell of this utility model after separation; Figure 6A This is a partial enlarged view of the two ends of the bottom shell involved in this utility model; Figure 6B yes Figure 5 A schematic diagram showing the relative positions of the middle components after they are projected onto plane M; Figure 7 This is a cross-sectional view of the developing cartridge involved in this utility model after being cut by a plane passing through the rotation axis of the developing roller and the rotation axis of the powder feeding roller simultaneously. Figure 8 This is a partially enlarged view of a longitudinal end of the developing cartridge involved in this utility model; Figure 9 It is along Figure 8 A sectional view cut along the BB direction.

[0029] (The overall structure of the developing chamber)

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, the developing cartridge 100 includes a housing 1, a rotating member 2, and a toner dispensing blade 3. The housing 1 includes a face cover 11 and a bottom cover 12 that are joined together. A toner receiving cavity 10 for receiving toner is formed between the face cover 11 and the bottom cover 12. The side of the housing 1 facing the toner receiving cavity 10 or the rotating member 2 is the inner side, and the side opposite to the inner side is the outer side. The length direction of the housing 1 is a first direction. The rotating member 2 is rotatably disposed on the housing 1. At least a portion of the rotating member 2 is opposite to the toner receiving cavity 10 in a direction perpendicular to the first direction.

[0031] The rotating component 2 includes at least a developing roller 21 for carrying toner. The developing roller 21 rotates along a rotation axis L parallel to the first direction. When the developing cartridge 100 performs development, the developing roller 21 supplies the carried toner toward the photosensitive drum opposite to it, thereby developing the electrostatic latent image formed on the surface of the photosensitive drum. Specifically, the developing roller 21 includes a developing roller shaft 211 and a developing layer 212 covering the developing roller shaft 211. Along the first direction, the developing roller shaft 211 protrudes from both ends of the developing layer 212. Therefore, the developing roller shaft 211 can penetrate the developing layer 212 along the first direction (e.g., ...). Figure 7 The developing roller shaft (shown by the dashed line) can also protrude from both ends of the developing layer 212 (e.g., Figure 7 (The developing roller shaft is shown by the solid line in the middle); such as Figure 3As shown, along the first direction, the developing layer 212 can be divided into a toner-bearing area S1 and a non-toner-bearing area S2. The two non-toner-bearing areas S2 are spaced apart, and the toner-bearing area S1 is located between the two non-toner-bearing areas S2. The toner-bearing area S1 is used to carry toner.

[0032] The powder discharge blade 3 is fixedly installed on the housing 1 and is used to adjust the amount of toner carried on the surface of the developing roller 21.

[0033] In some embodiments, the rotating component 2 further includes a toner feeding roller 22 that contacts the developing roller 21. The toner feeding roller 22 is also configured to rotate along a rotation axis parallel to the first direction, for supplying toner toward the developing roller 21. Specifically, the toner feeding roller 22 includes a toner feeding roller shaft 221 and a toner feeding layer 222 covering the toner feeding roller shaft 221. Along the first direction, the toner feeding roller shaft 221 protrudes from both ends of the toner feeding layer 222, thus allowing the toner feeding roller shaft 221 to penetrate the toner feeding layer 222 along the first direction (e.g., ...). Figure 7 The powder feeding roller shaft (shown by the dashed line) can also protrude from both ends of the powder feeding layer 222 (e.g., Figure 7 (The powder feeding roller shaft is shown by the solid line).

[0034] In some embodiments, the rotating component 2 further includes a stirring frame 23 rotatably disposed in the toner receiving cavity 10. The stirring frame 23 is also configured to rotate along a rotation axis parallel to the first direction. When the developing cartridge 100 is developing, the stirring frame 23 stirs the toner in the toner receiving cavity 10, which can prevent the toner from clumping and supply the toner to the toner feeding roller 22.

[0035] like Figure 1 and Figure 3 As shown, the developing cartridge 100 also includes an end cap 1a, a first bracket 1b, and a second bracket 1c. The end cap 1a is fixedly connected to the housing 1 and is used to protect the components between the end cap 1a and the housing 1. The first bracket 1b and the second bracket 1c are both fixedly connected to the housing 1. Along the first direction, the first bracket 1b and the second bracket 1c are arranged at intervals opposite to each other. One end of the developing roller shaft 211 passes through the first bracket 1b and is supported, while the other end of the developing roller shaft 211 is supported by the second bracket 1c.

[0036] In some embodiments, one end of the powder feeding roller 221 passes through the first bracket 1b and is supported, while the other end of the powder feeding roller 221 is supported by the housing 1; however, the first bracket 1b may also be configured to support only the developing roller 211 or the powder feeding roller 221, in which case the powder feeding roller 221 or the developing roller 211 not supported by the first bracket 1b may be supported by the end cap 1a.

[0037] (Drive force transmission within the developing chamber)

[0038] Furthermore, the developing cartridge 100 also includes a driving force receiver 43 and a driving force transmission assembly 45. The driving force receiver 43 is exposed from the end cover 1a and is used to receive driving force from the imaging device. The driving force transmission assembly 45 is used to transmit the driving force of the driving force receiver 43 to the rotating member 2 to drive the rotating member 2 to rotate. In the following text, along the first direction, the end where the driving force receiver 43 is provided is referred to as the driving end / left end, and the end opposite to the driving end is referred to as the non-driving end / right end. The first direction can also be referred to as the longitudinal direction.

[0039] like Figure 3 As shown, the driving force transmission assembly 45 includes a first transmission member 451, a second transmission member 452, a third transmission member 453, and a fourth transmission member 454. The second transmission member 452 is coaxially arranged with the developing roller 21, the third transmission member 453 is coaxially arranged with the powder feeding roller 22, and the fourth transmission member 454 is coaxially arranged with the stirring frame 23. The first transmission member 451 is coaxially arranged with the driving force receiving member 43, and the first transmission member 451 is also used to transmit the driving force of the driving force receiving member 43 to the second transmission member 452, the third transmission member 453, and the fourth transmission member 454. In this way, the developing roller 21, the powder feeding roller 22, and the stirring frame 23 can all be driven to rotate.

[0040] In some embodiments, the drive force transmission assembly 45 further includes at least one intermediate transmission element 455, thereby effectively improving the overall design freedom of the drive force transmission assembly 45 and the developing cartridge 100.

[0041] like Figure 3 As shown, the developing cartridge 100 also includes a support protrusion 1d for supporting the driving force receiving member 43 and / or the first transmission member 451. The support protrusion 1d is formed relative to the housing 1 in a direction away from the non-driving end. It can be provided on the housing 1 or on the first bracket 1b.

[0042] (Dispense powder)

[0043] The toner ejector 3 includes a blade holder 31 and a blade 32 connected to each other. The blade holder 31 is fixedly mounted on the housing 1 by a fixing part therein. The blade 32 is mounted on the blade holder 31 and contacts the developing roller 21 / developing layer 212 to adjust the thickness of the toner layer on the surface of the developing layer 212. Specifically, the blade 32 includes a first part 321 and a second part 322. The first part 321 is fixed on the blade holder 31, and the second part 322 extends from the first part 321 and contacts the developing roller 21 / developing layer 212.

[0044] Preferably, the powder dispensing blade 3 is fixed by screws. The fixing part is a through hole 33 provided on the blade holder 31. Correspondingly, the housing 1 is provided with a screw hole 123 for accommodating the screw. When the powder dispensing blade 3 is installed on the housing 1, the screw hole 123 is opposite to the through hole 33. In the following text, along the first direction, the fixing part provided at the left end is called the left fixing part 33L, and the fixing part provided at the right end is called the right fixing part 33R. The screw hole opposite to the left fixing part 33L is called the left screw hole 123L, and the screw hole opposite to the right fixing part 33R is called the right screw hole 123R. In other possible implementations, the fixing part 33 can also be a barb, magnet, etc. provided on the blade holder 31, as long as it can fix the powder dispensing blade 3. Along the first direction, the two fixing parts 33 are spaced apart.

[0045] In some embodiments, the toner ejector blade 3 further includes a bent portion 3222 extending from the second portion 322 to improve the stability of the contact between the blade 32 and the developing roller 21 / developing layer 212. The bent portion 3222 is opposite to the toner carrying area S1. Along the first direction, the two ends of the bent portion 3222 are not aligned with the two ends of the second portion 322. Therefore, at both the driving end and the non-driving end, a gap 3221 is formed between the bent portion 3222 and the second portion 322. In this way, excess toner carried by the developing layer 212 can enter the gap 3221, which helps to prevent toner accumulation and reduce the rotational resistance of the developing roller 21.

[0046] (Installation of the powder feeding roller)

[0047] Figure 4 This is an exploded view of the powder feeding roller and the bottom shell after separation, which are related to this utility model.

[0048] As described above, the powder feeding roller 22 is used to supply toner to the developing roller 21. Preferably, the powder feeding layer 222 is made of a porous material such as a sponge, so that the powder feeding layer 222 can be elastically deformed relative to the powder feeding roller shaft 221, or in other words, the maximum diameter of the powder feeding roller 22 can be reduced. For this purpose, the powder feeding roller 22 of the present invention can be installed in the following manner.

[0049] like Figure 4As shown, the housing 1 also includes a first sidewall 12a and a second sidewall 12b that are spaced apart from each other along a first direction. The toner receiving cavity 10 is located between the first sidewall 12a and the second sidewall 12b. The first sidewall 12a is provided with a first through hole 121, and the second sidewall 12b is provided with a second through hole 122. The size of one of the first through hole 121 and the second through hole 122 is larger than the size of the other. In this way, the toner feeding roller 22 can be inserted into the toner receiving cavity 10 along the first direction through the through hole with the larger size. Subsequently, the toner feeding roller shaft 221 passes through the through hole with the smaller size. An end seal 44 can also be installed on the side with the larger through hole. The end seal 44 can be used to seal the end of the toner feeding roller 22 and to support the toner feeding roller shaft 221.

[0050] (Developer cartridge seal)

[0051] Because toner has high fluidity, it is necessary to fully consider sealing the perimeter of the developing roller 21 to prevent toner leakage or flying out. The developing cartridge 100 also includes a longitudinal seal and a transverse seal. The longitudinal seal extends along the longitudinal direction and is used to seal the perimeter of the developing roller 21 in the direction intersecting with the longitudinal direction. The transverse seal extends along the transverse direction and is used to seal the developing roller 21 at the two longitudinal ends of the developing roller 21. The transverse direction intersects with the longitudinal direction. Along the transverse direction, the developing roller 21 is disposed at one end of the housing 1.

[0052] like Figure 3 As shown, the longitudinal seal includes a first seal 41 and a third seal 47 installed on the housing 1. The first seal 41 contacts the outer circumferential surface of the developing roller 21 / developing layer 212 to prevent toner leakage between the developing roller 21 and the housing 1. Preferably, the first seal 41 is provided as a sheet, and the bottom housing 12 has a mounting portion 12c for installing the first seal 41. The third seal 47 is disposed between the housing 1 and the toner discharge blade 3 to prevent toner leakage between the housing 1 and the toner discharge blade 3.

[0053] like Figure 5 As shown, the transverse seal includes a third seal 46L (also referred to as the "left seal") and a fourth seal 46R (also referred to as the "right seal") installed on the housing 1. The left seal 46L seals the left end of the developing roller 21 to prevent toner from leaking between the left end of the developing roller 21 and the housing 1. The right seal 46R seals the right end of the developing roller 21 to prevent toner from leaking between the right end of the developing roller 21 and the housing 1.

[0054] By installing the aforementioned longitudinal and transverse seals on the housing 1, the developing roller 21 is sealed all around. Furthermore, to prevent toner from leaking from the gaps between adjacent longitudinal and transverse seals, auxiliary seals can be provided between adjacent longitudinal and transverse seals. For example, a sponge can be installed between adjacent longitudinal and transverse seals, or sealant can be injected between adjacent longitudinal and transverse seals.

[0055] Depending on the type of toner, the materials used for the left seal 46L and the right seal 46R can also be different. For example, when the housing 1 contains non-magnetic toner, the left seal 46L and the right seal 46R can be made of elastic seals such as sponge or felt, preferably more wear-resistant felt. When the housing 1 contains magnetic toner, the left seal 46L and the right seal 46R can be made of magnetic seals such as magnetic felt.

[0056] Regardless of the materials of the left seal 46L and the right seal 46R, after the developing cartridge 100 is assembled, along the first direction, the developing roller 21 will be supported by the first bracket 1b, the left seal 46L, the right seal 46R, and the second bracket 1c, wherein the developing roller shaft 211 is supported by the first bracket 1b and the second bracket 1c, and the developing layer 212 is supported by the left seal 46L and the right seal 46R; the powder feeding roller 22 / powder feeding roller shaft 221 is also supported by at least one of the first bracket 1b and the end seal 44, as well as the side wall of the housing and the second bracket 1c.

[0057] As described above, due to the presence of the left seal 46L and the right seal 46R, along the first direction, the developing roller 21 / developing layer 212 will be divided into a toner-carrying area S1 and a non-toner-carrying area S2, such as... Figure 3 As shown, two non-toner carrier areas S2 are located on both sides of the toner carrier area S1. In this invention, by adjusting the positions of the left seal 46L and the right seal 46R in the first direction, the dimension n of the toner carrier area S1 in the first direction (e.g., ...) is adjusted. Figure 7 The size of the toner-carrying area S1 (as shown) is controlled between 216mm and 219.5mm. If the size n of the toner-carrying area S1 in the first direction is less than 216mm, it will lead to incomplete development of the imaging medium. If the size n of the toner-carrying area S1 in the first direction is greater than 219.5mm, it will lead to colored edges appearing in the non-imaging area of ​​the imaging medium. The colored edges refer to the presence of toner in the non-imaging area of ​​the imaging medium. The size n of the toner-carrying area S1 in the first direction is preferably 218mm-219mm to further improve the imaging quality.

[0058] like Figure 2As shown, when the developing cartridge 100 is developing, the developing roller 21 rotates in the direction indicated by r. The developing roller 21 and the first seal 41 have a contact position P3. Upstream of the contact position P3 along the rotation direction r, an exposure space S3 is formed between the developing roller 21 and the first seal 41 / mounting portion 12c. Further, in order to prevent toner from drifting out of the exposure space S3, the developing cartridge 100 also includes a second seal 42 disposed adjacent to the first seal 41. The second seal 42 also extends along the first direction, and the second seal 42 and the mounting portion 12c are connected to each other. In a direction perpendicular to the longitudinal direction, the second seal 42 is further away from the toner receiving cavity 10 than the mounting portion 12c.

[0059] It is possible that the second seal 42 can be a component attached to the bottom shell 12 or integrally formed with the bottom shell 12, as long as the second seal 42 can cover at least a portion of the exposed space S3. Therefore, the second seal 42 can also be referred to as a covering component. Preferably, the second seal 42 is integrally formed with the housing 1 / bottom shell 12. In this way, the installation step of the second seal 42 can be omitted, and the second seal 42 will not detach from the bottom shell 12.

[0060] (Positions of the left and right seals)

[0061] like Figure 5 and Figure 6A As shown, the developing cartridge 100 also includes a left glue injection channel 14L and a right glue injection channel 14R disposed on the housing 1. Along the direction intersecting with the first direction, the left glue injection channel 14L and the right glue injection channel 14R both penetrate the housing 1 / bottom shell 12. The sealant can be injected into the space between the longitudinal seal and the transverse seal through the glue injection channels 14L / 14R.

[0062] Along the first direction, a left glue injection channel 14L and a right glue injection channel 14R are respectively disposed at both ends of the housing 1. The left glue injection channel 14L has a left flow outlet 14L1 facing inward and a left flow inlet 14L2 facing outward (e.g., Figure 8 As shown), the right injection channel 14R has an inward-facing right outlet 14R1 and an outward-facing right inlet (not shown). At the left end of the housing 1, sealant flows in through the left inlet 14L2 and flows out through the left outlet 14L1. At the right end of the housing 1, sealant flows in through the right inlet and flows out through the right outlet 14R1.

[0063] After the developing roller 21 is installed, the left outlet 14L1 and the right outlet 14R1 are located at both ends of the developing layer 212, respectively. Along the direction intersecting with the first direction, a left mounting surface 124L for installing the left seal 46L is provided between the left outlet 14L1 and the left screw hole 123L, and a right mounting surface 124R for installing the right seal 46R is provided between the right outlet 14R1 and the right screw hole 123R. Along the first direction, the left mounting surface 124L has a left edge 126L located on the rightmost side, and the right mounting surface 124R has a right edge 126R located on the leftmost side.

[0064] Continue as Figure 5 As shown, the left seal 46L is elongated and has a first surface 46L1 and a second surface 46L2 that are spaced apart from each other in a first direction. The first surface 46L1 is closer to the right end of the housing 1 than the second surface 46L2. The right seal 46R is elongated and has a third surface 46R1 and a fourth surface 46R2 that are spaced apart from each other in a first direction. The third surface 46R1 is closer to the left end of the housing 1 than the fourth surface 46R2. Furthermore, the left seal 46L also has a first end 46L3 located between the first surface 46L1 and the second surface 46L2, and the right seal 46R also has a second end 46R3 located between the third surface 46R1 and the fourth surface 46R2.

[0065] When both the left seal 46L and the right seal 46R are installed on the housing 1, the first surface 46L1 and the third surface 46R1 are opposite to each other. When the powder feeding roller 22 is installed on the housing 1, the first surface 46L1 is opposite to the powder feeding roller 22 / powder feeding layer 222, and the third surface 46R1 is also opposite to the powder feeding roller 22 / powder feeding layer 222.

[0066] In some embodiments, the first end 46L3 is also opposite to at least a portion of the left outlet 14L1, and the second end 46R3 is also opposite to at least a portion of the right outlet 14R1. In this way, the sealant injected through the left injection channel 14L can flow between the left seal 46L and the housing 1, and the sealant injected through the right injection channel 14R can flow between the right seal 46R and the housing 1. This not only improves the sealing performance between the two seals and the first seal 41, but also allows the two seals to be bonded to the housing 1, effectively preventing the two seals from lifting and causing a deterioration in the sealing effect.

[0067] In some embodiments, the developing cartridge 100 further includes a left protrusion 15L and a right protrusion 15R disposed on the housing 1. Along the first direction, the left protrusion 15L is located to the left of the left outlet 14L1, and the right protrusion 15R is located to the right of the right outlet 14R1. That is, the two injection channels are located between the two protrusions. When the first seal 41 is installed, the first seal 41 can pass over the left outlet 14L1 and the right outlet 14R1 and is supported by the left protrusion 15L and the right protrusion 15R respectively. After the sealant is injected through the left injection channel 14L and the right injection channel 14R respectively, the first seal 41 can be more stably positioned on the housing 1.

[0068] In some embodiments, the left seal 46L is installed to the right side of the left protrusion 15L, and the left seal 46L is close to the right edge 15L1 of the left protrusion 15L. Thus, the left protrusion 15L can also limit the left seal 46L to prevent it from moving to the left. The right seal 46R is installed to the left side of the right protrusion 15R, and the right seal 46R is close to the left edge 15R1 of the right protrusion 15R. Thus, the right protrusion 15R can also limit the right seal 46R to prevent it from moving to the right.

[0069] It is understood that the left injection channel 14L and the right injection channel 14R can be through holes formed on the housing 1 / bottom shell 12, or they can be notches formed on the housing 1 / bottom shell 12, as long as sealant can be injected from the outside to the inside of the housing 1 / bottom shell 12 through the left injection channel 14L and the right injection channel 14R.

[0070] The following describes the positional relationship between the left seal 46L, the left outlet 14L1, and the left screw hole 123L, as well as the positional relationship between the right seal 46R, the right outlet 14R1, and the right screw hole 123R.

[0071] like Figure 6A As shown, the center line of the left screw hole 123L is set as the first center line LL. The plane M is perpendicular to the first center line LL. The straight line passing through the leftmost point P1 of the left outlet 14L1 and parallel to the first center line LL is d1. The straight line passing through the right edge 15L1 of the left protrusion 15L and parallel to the first center line LL is d2. Along the first direction, the straight line d1 is located to the right of the straight line d2, and the straight line d2 is located to the right of the first center line LL. Preferably, the straight line d2 is located to the right of the left screw hole 123L, that is, the straight line d2 does not pass through the left screw hole 123L.

[0072] like Figure 6BAs shown, the left screw hole 123L, the left outlet 14L1, and the left seal 46L are all projected onto plane M. The leftmost point P1 of the left outlet 14L1 is located at least to the right of the first center line LL, and the second surface 46L2 of the left seal 46L is also located at least to the right of the first center line LL.

[0073] The centerline of the right screw hole 123R is set as the second centerline LR. The plane M is also perpendicular to the second centerline LR. The straight line passing through the rightmost point P2 of the right outlet 14R1 and parallel to the second centerline LR is d3. The straight line passing through the left edge 15R1 of the right protrusion 15R and parallel to the second centerline LR is d4. Along the first direction, the straight line d3 is located to the left of the straight line d4, and the straight line d4 is located to the left of the second centerline LR. Preferably, the straight line d4 is located to the left of the right screw hole 123R, that is, the straight line d4 does not pass through the right screw hole 123R. Similarly, when the right screw hole 123R, the right outlet 14R1, and the right seal 46R are all projected onto the plane M, the rightmost point P2 of the right outlet 14R1 is at least to the left of the second centerline LR, and the fourth surface 46R2 of the right seal 46R is also at least to the left of the second centerline LR.

[0074] In some embodiments, one of the straight lines d2 and d4 may also pass through the center line of the screw hole 123 at their respective ends, that is, straight line d2 passes through the first center line LL of the left screw hole 123L, or straight line d4 passes through the second center line LR of the right screw hole 123R, which can also achieve the purpose of this application.

[0075] (Other notes)

[0076] like Figure 1 and Figure 3 As shown, the developing cartridge 100 also includes a driving force receiver 43 and a driving force transmission assembly 45. The driving force receiver 43 is exposed from the end cap 1a and is used to receive driving force from the imaging device. The driving force transmission assembly 45 is used to transmit the driving force received by the driving force receiver 43 to the rotating member 2 to drive the rotating member 2 to rotate. The end cap 1a is also used to cover at least a portion of the driving force transmission assembly 45 to protect the driving force transmission assembly 45.

[0077] Specifically, the driving force transmission assembly 45 includes a first transmission member 451, a second transmission member 452, a third transmission member 453, and a fourth transmission member 454. The first transmission member 451 is coaxially arranged with the driving force receiving member 43 and is used to receive the driving force from the driving force receiving member 43. Preferably, the first transmission member 451 and the driving force receiving member 43 are integrally formed. The second transmission member 452 is mounted on the developing roller shaft 211 and is used to directly or indirectly receive the driving force from the first transmission member 451 to drive the developing roller 21 to rotate. The third transmission member 453 is mounted on the powder feeding roller shaft 221 and is used to directly or indirectly receive the driving force from the first transmission member 451 to drive the powder feeding roller 22 to rotate. The fourth transmission member 454 is mounted on the stirring frame and is used to directly or indirectly receive the driving force from the first transmission member 451 to drive the stirring frame to rotate.

[0078] In some embodiments, the driving force transmission assembly 45 may also be provided with at least one intermediate transmission member 455, which is used to transmit driving force between the various transmission members, so that the transmission of driving force is smoother and more efficient. Furthermore, the specific position of the intermediate transmission member 455 can be set according to the overall design requirements of the developing cartridge 100.

[0079] like Figure 2 and Figure 8 As shown, the developing cartridge 100 also includes a stiffening plate 13 disposed on the housing 1 / bottom shell 12. The stiffening plate 13 is connected to the mounting part 12c and is used to strengthen the strength of the housing 1 / bottom shell 12, especially to strengthen the strength of the mounting part 12c, and to prevent the mounting part 12c from deforming, thereby causing a gap to appear between the first sealing member 41 mounted on the mounting part 12c and the developing roller 21, resulting in toner leakage from the gap.

[0080] Furthermore, when the second seal 42 is integrally formed with the housing 1 / bottom shell 12, the strength of the mounting portion 12c can be further enhanced. Therefore, the second seal 42 can also be referred to as a reinforcing member.

[0081] The end cap 1a and the first bracket 1b are both fixedly connected to the housing 1. Common fixed connection methods include snap-fit, adhesive, magnetic connection, threaded connection, etc. From the perspective of easy installation and disassembly, threaded connection is preferred.

[0082] Continue as Figure 8As shown, the end cap 1a is provided with an end cap hole 1a1, the first bracket 1b is provided with a bracket hole 1b1, and the housing 1 / bottom shell 12 is provided with a boss 125 for forming an end screw hole 125a. Along the first direction, the end screw hole 125a, the bracket hole 1b1 and the end cap hole 1a1 are opposite to each other. The screw passes through the end cap hole 1a1 and the bracket hole 1b1 and enters the end screw hole 125a, thereby fixing the first bracket 1b and the end cap 1a to the housing 1 / bottom shell 12.

[0083] like Figure 8 and Figure 9 As shown, along the direction intersecting the first direction, the second seal 42 also overlaps with the boss 125. In the case of injection molding of the housing 1 / bottom shell 12, for the housing 1 / bottom shell 12, the thickness of the overlapping area S4 of the second seal 42 and the boss 125 is much greater than the thickness of other areas of the second seal 42. This makes the overlapping area S4 require more injection molding material, which may lead to deformation of the end screw hole 125a.

[0084] Continue as Figure 9 As shown, to prevent the above-mentioned defects, the developing cartridge 100 of this utility model also includes a clearance portion 421 provided on the second sealing member 42. Along the direction intersecting with the first direction, the clearance portion 421 overlaps with the boss 125. Along the first direction, the thickness of the second sealing member 42 in the area where the clearance portion 421 is located is less than the thickness of the area outside the clearance portion 421. In this way, the thickness of the overlapping area S4 can be greatly reduced, and the risk of deformation of the end screw hole 125a can be effectively reduced.

[0085] Preferably, along the first direction, the size of the clearance portion 421 is not less than the size of the end screw hole 125a, and along the radial direction of the end screw hole 125a (a direction perpendicular to the first direction), the size of the clearance portion 421 is not less than the diameter of the end screw hole 125a.

[0086] (Beneficial effects)

[0087] As described above, along the first direction, the leftmost point P1 of the left outlet 14L1 is at least to the right of the first centerline LL, and the rightmost point P2 of the right outlet 14R1 is at least to the left of the second centerline LR. That is, along the direction intersecting / perpendicular to the first direction, the left outlet 14L1 and the left screw hole 123L are misaligned, and the right outlet 14R1 and the right screw hole 123R are also misaligned. Along the first direction, the left outlet 14L1 and the right outlet 14R1 are located between the first centerline LL and the second centerline LR. After the left seal 46L and the right seal 46R are installed, the left seal 46L is at least to the right of the first centerline LL, and the right seal 46R is at least to the left of the second centerline LR. That is, along the first direction, the left seal 46L and the right seal 46R are also located between the first centerline LL and the second centerline LR.

[0088] This can produce the following beneficial effects:

[0089] 1. This prevents sealant from flowing into the left screw hole 123L and the right screw hole 123R, causing blockage of the two screw holes and preventing the powder discharge knife 3 from being stably fixed.

[0090] 2. In directions intersecting / perpendicular to the first direction, the dimensions of both the left seal 46L and the right seal 46R can be lengthened, which is beneficial to improving the end sealing effect of the developing cartridge.

[0091] 3. For example Figure 7 As shown, along the first direction, a left receiving space S51 will be formed between the left seal 46L and the first support 1b, and a right receiving space S52 will be formed between the right seal 46R and the second support 1c. Even if toner leaks from both ends of the developing roller 21 in the longitudinal direction, the leaked toner can be contained by the left receiving space S51 and the right receiving space S52.

[0092] 4. For example Figure 6A As shown, when viewed along a direction perpendicular to the first direction, the left outlet 14L1 is located within the range of the left mounting surface 124L, and the right outlet 14R1 is located within the range of the right mounting surface 124R. With the above-described structural configuration, the dimensions of the left mounting surface 124L and the right mounting surface 124R in the first direction can be lengthened. Consequently, the one with the larger dimension (referring to the radial dimension perpendicular to the first direction) among the first through hole 121 and the second through hole 122 will also become deeper in the first direction. Correspondingly, the dimension of the end seal 44 in the first direction can also be lengthened, and the powder feeding roller shaft 221 will be able to be supported more stably.

[0093] 5. According to point 4, the size of the powder feeding layer 222 of the powder feeding roller 22 in the first direction can be reduced. Therefore, the material cost of the powder feeding roller 22 can be reduced, and the amount of toner conveyed by the powder feeding roller 22 to the developing roller 21 can also be reduced, which is beneficial to reducing toner consumption.

[0094] 6. According to point 4, such as Figure 5 As shown, along the first direction, since the left end of the powder feeding layer 222 of the powder feeding roller 22 is opposite to the rightmost left edge 126L of the left mounting surface 124L, and the right end of the powder feeding layer 22 is opposite to the leftmost right edge 126R of the right mounting surface 124R, while the size of the powder feeding layer 222 of the powder feeding roller 22 remains unchanged in the first direction, the size of the left mounting surface 124L and the right mounting surface 124R in the first direction are both lengthened, which can reduce the amount of movement of the powder feeding roller 22 in the first direction.

[0095] 7. The left seal 46L and the right seal 46R respectively contact the outer circumferential surface of the developing roller 21 / developing layer 212. Along the first direction, the distance between the first surface 46L1 and the third surface 46R1 will define the size n of the toner carrying area S1. As described above, with the above settings, the size n can be controlled between 216mm and 219.5mm. In existing products, the size of the toner carrying area is between 221mm and 223mm. It can be seen that the size n in this utility model is shortened.

[0096] In the case where the developing cartridge 100 of this utility model is used in a desktop imaging device, it is well known that the imaging medium used in a desktop imaging device is generally A4 standard or letter standard. The size of the A4 standard imaging medium is 210mm*297mm, and the size of the letter standard imaging medium is 215.9mm*279.4mm.

[0097] Regardless of whether the imaging device uses A4 standard imaging media or letter standard imaging media, the amount of toner carried by the developing roller 21 in the developing cartridge 100, as described in this utility model, can be reduced. Figure 7 As shown, the toner-carrying area S1 can be divided into a developing area S11 and a non-developing area S12. Along the first direction, the two non-developing areas S12 are located at opposite ends of the developing area S11. Compared to existing products, with the size of the developing area S11 remaining unchanged, the size of the non-developing area S12 of the developing roller 21 in the developing cartridge 100 of this invention is obviously reduced. Therefore, the technical solution described in this invention can produce:

[0098] Firstly, the risk of the toner carried in the non-developing area S12 being supplied to the photosensitive drum can be reduced, and correspondingly, the risk of the toner carried in the non-developing area S12 reaching the imaging medium is also reduced, and the imaging quality can be effectively improved.

[0099] Secondly, generally, after the toner carried by the developing roller 21 is supplied to the surface of the photosensitive drum, although most of it will be transferred to the imaging medium, a small amount of toner will always remain on the surface of the photosensitive drum. This residual toner will be cleaned off by the cleaning system and become waste toner. As for the non-developing area S12, the toner carried therein will not participate in development at all. The toner supplied to the surface of the photosensitive drum from the non-developing area S12 will be completely cleaned off. Therefore, the larger the non-developing area S12 is, the greater the amount of toner wasted. Obviously, the amount of toner wasted by the developing cartridge 100 using the technical solution described in this utility model will be greatly reduced.

[0100] Thirdly, the toner wear on the area outside the developing zone S11 of the photosensitive drum and the developing roller 21 can be reduced.

[0101] 8. It is known that the developing roller 21 is a cylinder extending along the first direction. The longitudinal dimension of the developing roller 21 is much larger than the radial dimension of the developing roller 21. When the developing roller 21 is installed in the housing 1, since only the two longitudinal ends of the developing roller 21 are supported, from a microscopic perspective, the middle region of the developing roller 21 will naturally sag. If the middle region of the developing roller 21 can be supported, then the stability of the developing roller 21 during rotation can be improved.

[0102] However, given the structure of the developing cartridge, such as Figure 7 As shown, the central region of the developing roller 21 cannot be supported. However, in the developing cartridge 100 of this invention, as described above, along the first direction, the developing roller 21 is supported by the first bracket 1b, the left seal 46L, the right seal 46R, and the second bracket 1c. The first bracket 1b and the second bracket 1c support the developing roller shaft 211, and the left seal 46L and the right seal 46R support the developing layer 212. The left seal 46L and the right seal 46R are located between the first center line LL and the second center line LR. In other words, the left seal 46L is closer to the center line L0 of the toner carrying area S1 (perpendicular to the first direction) than the first center line LL, and the right seal 46R is closer to the center line L0 than the second center line LR. Compared with existing products, the developing roller 21 involved in this invention can be supported more stably, and the vibration amplitude when the developing roller 21 rotates can be greatly reduced, thereby effectively improving the imaging quality.

[0103] Based on the inventive concept of this utility model, when the leftmost point P1 of the left outlet 14L1 is located to the right of the left screw hole 123L, and the rightmost point P2 of the right outlet 14R1 is located to the left of the right screw hole 123R, the above-mentioned beneficial effects will be more obvious.

[0104] Preferably, the second surface 46L2 of the left seal 46L contacts the right edge 15L1 of the left protrusion 15L, and the fourth surface 46R2 of the right seal 46R contacts the left edge 15R1 of the right protrusion 15R, so that the left seal 46L and the right seal 46R can be installed more stably.

[0105] Preferably, the first surface 46L1 of the left seal 46L is flush with the rightmost left edge 126L of the left mounting surface 124L, and the third surface 46R1 of the right seal 46R is flush with the leftmost right edge 126R of the right mounting surface 124R, so that the size n of the toner carrying area S1 can be controlled more effectively.

[0106] Although it is possible to adjust the size n of the toner carrying area S1 by simply adjusting the position of the first surface 46L1 of the left seal 46L and the position of the third surface 46R1 of the right seal 46R in the first direction, that is, keeping the positions of the second surface 46L2 of the left seal 46L and the fourth surface 46R2 of the right seal 46R unchanged in the first direction, which is equivalent to enlarging the existing size of the left and right seals along the first direction, since both the left seal 46L and the right seal 46R are in contact with the developing layer 212, this is problematic. Furthermore, the materials used for the left seal 46L and right seal 46R have a high coefficient of friction. The left seal 46L and right seal 46R, whose dimensions are stretched along the first direction, not only cause a significant increase in friction when the developing roller 21 rotates, but also increase the material cost of the left seal 46L and right seal 46R. Therefore, it is more advantageous to keep the dimensions of the left seal 46L and right seal 46R unchanged in the first direction, so that the left seal 46L and right seal 46R as a whole are located at least between the first center line LL and the second center line LR.

[0107] 9. The developing cartridge 100 is also provided with a second sealing element 42 integrally formed with the housing 1 / bottom housing 12 to prevent toner from drifting out from the exposed space S3 formed between the developing roller 21 and the first sealing element 41 / mounting part 12c. Compared with the anti-spraying sheet separately formed with the bottom housing 12 in the prior art, the present invention can save material costs and reduce labor costs by providing a second sealing element 42 integrally formed with the housing 1 / bottom housing 12 instead of an anti-spraying sheet.

[0108] 10. The second seal 42 is integrally formed with the housing 1 / bottom shell 12, which can enhance the strength of the mounting part 12c.

[0109] 11. The developing cartridge 100 also includes a stiffening plate 13 disposed on the housing 1 / bottom housing 12 to enhance the strength of the housing 1 / bottom housing 12, especially to enhance the strength of the mounting part 12c, prevent the mounting part 12c from deforming, thereby avoiding the formation of a gap between the first sealing member 14 mounted on the mounting part 12c and the developing roller 21, which would cause toner to leak from the gap.

[0110] 12. Since the second seal 42 overlaps with the boss 125 for forming the end screw hole 125a, the thickness of the overlapping area S4 is much greater than the thickness of other areas of the second seal 42, which requires more injection molding material for the overlapping area S4, thus easily causing the end screw hole 125a to deform. Therefore, the developing cartridge 100 of this utility model also includes a clearance portion 421 provided on the second seal 42. Along the first direction, the thickness of the second seal 42 in the area where the clearance portion 421 is located is less than the thickness of the area outside the clearance portion 421, which greatly reduces the thickness of the overlapping area S4 of the second seal 42 and the boss 125, and effectively reduces the risk of deformation of the end screw hole 125a.

Claims

1. A developing cartridge, detachably mounted into an imaging device, characterized in that, The developing cartridge includes: The shell has a toner receiving cavity for containing toner. A developing roller, rotatably disposed in a housing for carrying toner, includes a developing roller shaft and a developing layer covering the developing roller shaft, the developing roller rotating along a rotation axis parallel to the longitudinal direction; A driving force receiver is used to receive driving force from the imaging device. The developing roller is driven to rotate by the driving force from the driving force receiver. In the longitudinal direction, the end where the driving force receiver is provided is the left end, and the end opposite to the left end is the right end. The toner ejector blade is fixedly mounted on the housing via a fixing part therein, and is used to adjust the thickness of the toner layer on the surface of the developing layer. The fixing part includes a left fixing part at the left end and a right fixing part at the right end. Screw holes for accommodating screws include a left screw hole opposite to the left fixing part and a right screw hole opposite to the right fixing part. The center line of the left screw hole is the first center line LL, and the center line of the right screw hole is the second center line LR. Outlets for allowing sealant to flow out include a left outlet and a right outlet facing inwards, which are respectively located at both ends of the housing along the longitudinal direction, and the inwards side is the side of the housing facing the toner receiving cavity; Along the longitudinal direction, the left-flow outlet and the right-flow outlet are located between the first centerline LL and the second centerline LR.

2. The developing cartridge according to claim 1, characterized in that, The developing cartridge also includes a left seal for sealing the left end of the developing roller and a right seal for sealing the right end of the developing roller. Along the longitudinal direction, the left and right seals are located between the first centerline LL and the second centerline LR.

3. The developing cartridge according to claim 2, characterized in that, The left seal has a first surface and a second surface that are spaced apart and opposite each other in the longitudinal direction, and a first end located between the two. The right seal has a third surface and a fourth surface that are spaced apart and opposite each other in the longitudinal direction, and a second end located between the two. The first end is at least partially opposite to the left-flow outlet; The second end is at least partially opposite to the right-flow outlet.

4. The developing cartridge according to claim 3, characterized in that, The developing cartridge also includes a left protrusion and a right protrusion disposed on the housing. The left protrusion is located to the left of the left seal and is used to limit the left seal. The right protrusion is located to the right of the right seal and is used to limit the right seal.

5. The developing cartridge according to claim 2, characterized in that, The developing layer includes a toner-bearing region for carrying toner; Along the longitudinal direction, the left seal has a first surface near the right end of the housing, and the right seal has a third surface near the left end of the housing. When both the left and right seals are installed into the housing, the first and third surfaces are opposite to each other. Along the longitudinal direction, the distance between the first surface and the third surface is the size of the toner-bearing area; The dimensions of the toner-bearing area are set to 216mm-219.5mm.

6. The developing cartridge according to claim 5, characterized in that, The size of the toner-bearing area is 218mm-219mm.

7. The developing cartridge according to claim 5, characterized in that, Along the direction intersecting the longitudinal direction, a left mounting surface for installing a left seal is provided between the left outlet and the left screw hole, and a right mounting surface for installing a right seal is provided between the right outlet and the right screw hole. The first surface of the left seal is flush with the left edge of the rightmost side of the left mounting surface; The third surface of the right seal is flush with the right edge of the leftmost side of the right mounting surface.

8. The developing cartridge according to claim 1, characterized in that, The developing cartridge also includes a first seal and a third seal installed on the housing, as well as a left protrusion and a right protrusion provided on the housing; The first seal is used to contact the outer circumferential surface of the developing layer to prevent toner from leaking between the developing roller and the housing; The third sealing element is disposed between the housing and the powder discharge blade to prevent carbon powder from leaking between the housing and the powder discharge blade. The left protrusion is located to the left of the left outlet, and the right protrusion is located to the right of the right outlet; The first seal is supported by the left and right protrusions.

9. The developing cartridge according to claim 2, characterized in that, Along the longitudinal direction, the developing cartridge also includes a first bracket and a second bracket that are spaced apart from each other at both ends of the housing, and both the first bracket and the second bracket are fixedly connected to the housing; Along the longitudinal direction, a left receiving space is formed between the left seal and the first support, and a right receiving space is formed between the right seal and the second support. The left and right receiving spaces are used to receive toner leaking from both ends of the developing roller in the longitudinal direction.

10. The developing cartridge according to claim 1, characterized in that, Along the longitudinal direction, the developing cartridge also includes a first bracket and a second bracket that are spaced apart from each other at both ends of the housing, and both the first bracket and the second bracket are fixedly connected to the housing; Along the longitudinal direction, the developing roller is supported by a first support, a left seal, a right seal, and a second support; The first and second supports are used to support the developing roller shaft, and the left and right seals are used to support the developing layer.

11. The developing cartridge according to claim 1, characterized in that, The housing includes a first sidewall and a second sidewall that are spaced apart from each other in the longitudinal direction. The first sidewall is provided with a first through hole, and the second sidewall is provided with a second through hole. The size of one of the first through hole and the second through hole is larger than the size of the other. It has a large through-hole to allow the powder feeding roller to be installed, and a small through-hole to allow the powder feeding roller shaft to pass through.

Images