Processing box

Abstract

The utility model discloses a processing box, which comprises a drum unit, a processing unit and a processing unit, a developing unit having a developing roller and a developing frame, the developing unit being movable relative to the drum unit between a first position where the developing roller contacts the photosensitive drum and a second position where the developing roller is separated from the photosensitive drum; the photosensitive coupler is used for receiving the rotary driving force and transmitting the rotary driving force to the photosensitive drum; the developing coupler is used for receiving the rotary driving force and transmitting the rotary driving force to the developing roller; the end cover is arranged on the outer side of one end of the developing frame, the end cover is provided with a through hole and a notch part, and a part of the photosensitive coupler is exposed through the through hole; the developing coupling has a gear portion, and a portion of the gear portion is exposed through the cutout portion. The developing coupling of the processing box is rotatably mounted on the developing bearing, and is not supported by the developing protecting cover, so that the technical problems that the positioning of the developing coupling is inaccurate and the driving force cannot be stably transmitted due to the structural defects of the developing bearing or the developing protecting cover in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic imaging equipment, in particular to a processing box. Background Art

[0002] An electronic imaging device forms an image on a recording material (such as paper) using an electronic photographic imaging process. Examples of electronic imaging devices include an electronic photographic copier, an electronic photographic printer, a fax machine, a word processor, and the like. The cartridge includes at least one of an electronic photographic photosensitive drum as a photosensitive member and a developing member (such as a developing roller) that can act on the drum, and the photosensitive member and the developing member may also be integrally constructed as a cartridge (which may be referred to as a process cartridge) that can be detachably mounted in the electronic imaging device. The frame including the photosensitive member in the process cartridge is a photosensitive frame, and the frame including the developing member is a developing frame.

[0003] The developing device in the prior art includes: a developer carrying member, which is configured to develop an electrostatic image; a developing frame, which is configured to accommodate the developer; a developing bearing, which is configured to be attached to the frame, the developing bearing having an axial hole and rotatably supporting the developer carrying member through the axial hole; a developing cover, which is configured to be attached to the developing bearing, the developing cover having another axial hole opposite to the position of the developing shaft, so that the shaft portion of the developing gear is positioned through the axial holes on the developing bearing and the developing cover; a developing end cover, which is configured to have two holes, wherein a developing driving force receiving portion and a photosensitive driving force receiving portion can be exposed through the holes respectively to receive the driving force; a developing gear, which is configured such that the at least one driving transmission gear is configured to engage with the developing gear in a manner that the driving force is transmitted between the gears, and is rotatably arranged between the developing bearing and the developing cover through the axial hole, and the driving force receiving portion that receives the driving force of the imaging device is exposed to the outside through the axial hole. This connection method uses two parts, the developer bearing and the developer cover, to position the developer gear. The processing accuracy of the two parts will directly affect the positional relationship of the drive head. If the developer bearing and the developer cover are loose or damaged, it may cause eccentric rotation of the drive head, causing wear of parts and hindering the transmission of driving force. Utility Model Content

[0004] According to one aspect of the utility model, there is provided a processing box, comprising:

[0005] a drum unit having a photosensitive drum and a photosensitive frame;

[0006] A developing unit having a developing roller and a developing frame, wherein the developing unit is movable relative to the drum unit between a first position where the developing roller contacts the photosensitive drum and a second position where the developing roller and the photosensitive drum are separated;

[0007] A photosensitive coupling, for receiving a rotational driving force and transmitting it to the photosensitive drum;

[0008] A developing coupling, for receiving a rotational driving force and transmitting it to the developing roller;

[0009] An end cover is arranged on the outer side of one end of the developing frame, the end cover has a through hole and a notch, and a part of the photosensitive coupling is exposed through the through hole;

[0010] The developing coupling has a gear portion, and a portion of the gear portion is exposed through the notch portion.

[0011] In some embodiments, the developing coupling further comprises a driving force receiving portion, wherein the driving force receiving portion is a triangular protrusion; and the driving force receiving portion is completely exposed through the notch portion.

[0012] In some embodiments, a developing bearing is also provided, which is arranged at one end of the developing frame, and a protruding cylindrical structure is provided on one side of the developing bearing; a hollow portion is provided on one side of the developing coupling; and the developing coupling is sleeved on the cylindrical structure through the hollow portion.

[0013] In some embodiments, a developer cover is further provided, which is arranged between the developer frame and the end cover, and the lower side of the gear part of the developer coupling is covered by the developer cover or the developer cover does not cover the upper rear side of the gear part of the developer coupling.

[0014] In some embodiments, a developer cover is also provided, which is arranged between the developer frame and the end cover. When viewed along the length direction of the processing box, a portion of the developer cover overlaps with a portion of the developer coupling, and another portion of the developer cover overlaps with a portion of the end cover.

[0015] In some embodiments, a developing bearing and a developing cover are also provided; the developing bearing is arranged at one end of the developing frame, and the developing coupling is rotatably mounted on the developing bearing; the developing cover is arranged on the outer side of the developing bearing, and the developing cover does not support the developing coupling.

[0016] In some embodiments, a developing bearing and a developing cover are also provided; the developing bearing is arranged at one end of the developing frame, and the developing coupling is rotatably mounted on the developing bearing; observed along the length direction of the processing box, a part of the developing cover overlaps with a part of the developing coupling, and another part of the developing cover overlaps with a part of the end cover.

[0017] In some embodiments, a connecting portion for connecting the developing unit and the drum unit is further provided, and the connecting portion is arranged on the end cover; when observed along the length direction of the process box, the connecting portion does not overlap with the developing coupling.

[0018] In some embodiments, a connecting portion for connecting the developing unit and the drum unit is also provided, the connecting portion comprising a through hole and a supporting column embedded in the through hole, the through hole is arranged on the end cover, and the supporting column is arranged on the developing unit; when observed along the length direction of the processing box, the connecting portion does not overlap with the developing coupling.

[0019] In some embodiments, the connecting portion is used to connect the developing unit and the drum unit in a swingable manner.

[0020] In some embodiments, the notch portion extends upward to an upper end of the end cover.

[0021] In some embodiments, the notch portion further extends backward to a rear end of the end cover.

[0022] In some embodiments, a separation member is further provided, the separation member being disposed at one end of the developing unit, the separation member being configured to receive a force for moving the developing unit from the first position to the second position.

[0023] In some embodiments, the separator is disposed below the developing frame or below the end cover.

[0024] In some embodiments, a developing cover is further provided on one side of the developing frame, and the separating member is provided at a lower end of the developing cover.

[0025] In some embodiments, a portion of the separator is exposed from below the developing frame.

[0026] The utility model provides another processing box, comprising:

[0027] a drum unit having a photosensitive drum and a photosensitive frame;

[0028] A developing unit having a developing roller and a developing frame, wherein the developing unit is movable relative to the drum unit between a first position where the developing roller contacts the photosensitive drum and a second position where the developing roller and the photosensitive drum are separated;

[0029] A developing coupling, for receiving a rotational driving force and transmitting it to the developing roller;

[0030] An end cover is arranged on the outer side of one end of the developing frame, the end cover has a through hole and a notch portion, and the notch portion extends upward to the upper end of the end cover;

[0031] The developing coupling has a gear portion, and a portion of the gear portion is exposed through the notch portion.

[0032] The utility model provides another processing box, comprising:

[0033] a drum unit having a photosensitive drum and a photosensitive frame;

[0034] A developing unit having a developing roller and a developing frame, wherein the developing unit is movable relative to the drum unit between a first position where the developing roller contacts the photosensitive drum and a second position where the developing roller and the photosensitive drum are separated;

[0035] A developing coupling, for receiving a rotational driving force and transmitting it to the developing roller;

[0036] An end cover is arranged on the outer side of one end of the developing frame, the end cover has a through hole and a notch portion, and the notch portion extends backward to the rear end of the end cover;

[0037] The developing coupling has a gear portion, and a portion of the gear portion is exposed through the notch portion.

[0038] The utility model provides another processing box, comprising:

[0039] a drum unit having a photosensitive drum and a photosensitive frame;

[0040] A developing unit having a developing roller and a developing frame, wherein the developing unit is movable relative to the drum unit between a first position where the developing roller contacts the photosensitive drum and a second position where the developing roller and the photosensitive drum are separated;

[0041] A developing coupling, for receiving a rotational driving force and transmitting it to the developing roller;

[0042] An end cover is arranged on the outer side of one end of the developing frame, and the end cover has a through hole and a notch;

[0043] A developing protective cover, disposed between the developing frame and the end cover, wherein the developing protective cover does not support the developing coupling;

[0044] The developing coupling has a gear portion, and a portion of the gear portion is exposed through the notch portion.

[0045] The utility model provides another processing box, comprising:

[0046] a drum unit having a photosensitive drum and a photosensitive frame;

[0047] A developing unit having a developing roller and a developing frame, wherein the developing unit is movable relative to the drum unit between a first position where the developing roller contacts the photosensitive drum and a second position where the developing roller and the photosensitive drum are separated;

[0048] A developing coupling, for receiving a rotational driving force and transmitting it to the developing roller;

[0049] An end cover is arranged on the outer side of one end of the developing frame, and the end cover has a through hole and a notch;

[0050] A developer protective cover is arranged between the developer frame and the end cover, and when viewed along the length direction of the process cartridge, a portion of the developer protective cover overlaps a portion of the developer coupling;

[0051] The developing coupling has a gear portion, and a portion of the gear portion is exposed through the notch portion.

[0052] The beneficial effects of the utility model are as follows: the developing coupling of the processing box of the utility model can be rotatably fixedly mounted on the developing bearing, and the developing coupling is not supported by the developing cover, which solves the technical problems in the prior art of inaccurate positioning of the developing coupling and inability to stably transmit the driving force due to structural defects of the developing bearing or the developing cover itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 It is a schematic diagram of the overall structure of the processing box of the first embodiment from one angle;

[0054] Figure 2 It is a schematic diagram of the overall structure of the processing box of the first embodiment from another angle;

[0055] Figure 3 It is a schematic diagram of the partial exploded structure of the driving end of the process cartridge of the first embodiment;

[0056] Figure 4 (a) and (b) are schematic structural diagrams of the developing coupling of the process cartridge of Example 1;

[0057] Figure 5 It is a partial cross-sectional schematic diagram of the driving end of the process cartridge of the first embodiment;

[0058] Figure 6 It is a schematic diagram of the partial exploded structure of the conductive end of the process box of the first embodiment;

[0059] Figure 7 It is a schematic diagram of the overall structure of the processing box of the second embodiment;

[0060] Figure 8 It is a schematic diagram of the partial exploded structure of the driving end of the process cartridge of the second embodiment;

[0061] Fig. 9 It is a structural schematic diagram of the processing box of the second embodiment from another angle;

[0062] Fig.10 It is a partial exploded schematic diagram of the process cartridge of the second embodiment;

[0063] Fig.11 It is a schematic structural diagram of the driving end of the process cartridge of the second embodiment, in which the driving side end cover is omitted;

[0064] Fig.12 It is a partial cross-sectional schematic diagram of the conductive end of the process cartridge of the second embodiment;

[0065] Fig.13 It is a schematic diagram of the overall structure of the processing box of the third embodiment;

[0066] Fig.14 It is a partial exploded schematic diagram of the process cartridge of the third embodiment;

[0067] Fig.15 It is a structural schematic diagram of a developing coupling of a process cartridge of Embodiment 3;

[0068] Fig.16 is a partial cross-sectional schematic diagram of a process cartridge of Embodiment 3;

[0069] Fig.17 It is a partial exploded schematic diagram of the process cartridge of the fourth embodiment;

[0070] Fig.18 (a) and (b) are schematic structural diagrams of the power receiving portion of the developing coupling of the fourth embodiment;

[0071] Fig.19 (a) and (b) are schematic structural diagrams of the gear portion of the developing coupling of the fourth embodiment;

[0072] Fig. 20 is a partial cross-sectional schematic diagram of a process cartridge of Embodiment 4;

[0073] Fig.21 It is a partial exploded schematic diagram of the process cartridge of the fifth embodiment;

[0074] Fig. 22 is a partial cross-sectional schematic diagram of a process cartridge of Embodiment 5;

[0075] Fig.23 It is a partial structural schematic diagram of a processing box of Embodiment 6 at one angle;

[0076] Fig.24 It is a schematic diagram of the partial structure of the process box of the sixth embodiment from another angle;

[0077] Fig.25 is a partial exploded schematic diagram of a process cartridge of Embodiment 6;

[0078] Fig.26 It is a partial structural schematic diagram of the processing box of the seventh embodiment;

[0079] Fig. 27 is a partial exploded schematic diagram of a process cartridge of Embodiment 7;

[0080] Fig.28 It is a structural exploded view of the process box of the eighth embodiment;

[0081] Fig.29 is a schematic diagram of a driving end of a developing unit of Embodiment 8;

[0082] Fig.30 is a structural schematic diagram of a drum unit of Embodiment 8;

[0083] Fig.31 is a schematic diagram of a driving end of a process cartridge of Embodiment 8;

[0084] Fig.32 is a schematic structural diagram of a separation element of Embodiment 8;

[0085] Fig.33 It is a schematic structural diagram of the driving side end cover of the eighth embodiment;

[0086] Fig.34 It is a schematic diagram of the cooperation between the separation member and the driving side end cover of the eighth embodiment;

[0087] Fig.35 is a side view of the driving end of the process cartridge of Embodiment 8;

[0088] Fig.36 It is a schematic diagram of the driving end of the process cartridge of Embodiment 8 after removing the driving side end cover;

[0089] Fig.37 for Fig.36 A magnified view of part A;

[0090] Fig.38 The figure is a diagram of the initial state of the process cartridge of Embodiment 8 after the drive side end cover is removed;

[0091] Fig.39 This is a diagram of the separation state of the processing box of Example 8 after removing the drive side end cover. DETAILED DESCRIPTION

[0092] The utility model is further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0093] It should be noted that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0094] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0095] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0096] In the above description, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0097] The following descriptions of directions are as follows:

[0098] The directions A1 and A2 are the first direction, the direction indicated by A1 is the positive direction of the first direction, and the direction indicated by A2 is the negative direction of the first direction, and the first direction is defined as the length direction of the process box;

[0099] The directions B1 and B2 are the second direction, the direction indicated by B1 is the positive direction of the second direction, and the direction indicated by B2 is the negative direction of the second direction, and the second direction is defined as the width direction of the process box;

[0100] The directions C1 and C2 are the third direction, the direction pointed by C1 is the positive direction of the third direction, and the direction pointed by C2 is the negative direction of the third direction. The third direction is defined as the height direction of the processing box.

[0101] The first direction, the second direction and the third direction intersect each other.

[0102] The electronic imaging device forms an image on a recording material using, for example, an electronic photographic imaging process. The electronic imaging device includes, for example, an electronic photographic copier, an electronic photographic printer (LED printer, laser printer, etc.), an electronic photographic printer-type fax machine, etc. A processing box is detachably mounted in the electronic imaging device, and the processing box includes a photosensitive drum, a developing roller for developing an electrostatic latent image formed on the photosensitive drum, etc. The electronic imaging device includes a drive head, which is used to transmit the driving force of the electronic imaging device to the processing box to operate the processing box.

[0103] Embodiment 1

[0104] like Figure 1 and Figure 2 As shown, this embodiment provides a processing box, including a developing unit 100, a drum unit 200 and a driving assembly, the developing unit 100 includes a developing frame 110, a developing roller, a powder feeding roller and a powder discharge knife, and the drum unit 200 includes a photosensitive frame 210, a photosensitive drum, a charging roller and a cleaning blade. The processing box is roughly in the shape of a rectangular box, which has a length in the first direction (A1 and A2 directions), a width in the second direction (B1 and B2 directions), and a height in the third direction (C1 and C2 directions); one end of the processing box in the A1 direction is a driving end, and one end in the A2 direction is a conductive end, the developing unit 100 and the drum unit 200 are arranged opposite to each other in the second direction, the direction from the developing unit 100 to the drum unit 200 is the B1 direction, one end of the processing box along the B1 direction is the front end, the direction from the drum unit 200 to the developing unit 100 is the B2 direction, one end along the B2 direction is the rear end, one end of the processing box along the C1 direction is the upper end, and one end along the C2 direction is the lower end.

[0105] like Figure 1 , Figure 2 and Figure 6 As shown, the developing frame 110 forms a powder bin for storing toner, and the developing frame 110 is roughly in the shape of a long box. The length direction of the developing frame 110 extends along the first direction (directions A1 and A2). The developing frame 110 is provided with a developing bearing 120 and a conductive side bracket 140 at both ends of the length direction (directions A1 and A2), respectively. The powder feeding roller and the developing roller are rotatably supported on the developing bearing 120 and the conductive side bracket 140 at both ends of the length direction of the developing frame 110. The powder feeding roller and the developing roller can rotate under the action of the driving assembly, and the axial directions of the powder feeding roller and the developing roller are both arranged along the length direction (first direction) of the developing frame 110. The powder feeding roller contacts the developing roller and transports the toner in the powder bin to the developing roller and is adsorbed by the charged developing roller.

[0106] like Figure 1 and Figure 6 As shown, the photosensitive frame 210 forms a waste toner bin for collecting waste toner. The photosensitive frame 210 also has a length direction, which is consistent with the length direction of the developing frame 110 (both along the A1 and A2 directions). The photosensitive frame 210 is provided with end caps at both ends in the first direction, which are a driving side end cap 220 fixedly provided at one end of the photosensitive frame 210 in the A1 direction and a conductive side end cap 230 fixedly provided at one end of the photosensitive frame 210 in the A2 direction. The photosensitive drum is rotatably supported on the driving side end cap 220 and the conductive side end cap 230. Specifically, the photosensitive drum is provided on the lower end side (the C2 direction side) of the photosensitive frame 210 in the height direction. The toner adsorbed by the developing roller transfers the toner to the photosensitive drum through the potential difference between the developing roller and the photosensitive drum. The toner on the photosensitive drum is then transferred by the transfer belt of the electronic imaging device to form an image on the recording material (such as paper). After the transfer, the cleaning blade contacts the photosensitive drum linearly to clean the toner that has not been completely transferred on the surface of the photosensitive drum, that is, the waste toner. The cleaned waste toner is stored in the waste toner bin. The charging roller is used to charge the surface of the photosensitive drum evenly so that the photosensitive drum can absorb the toner.

[0107] like Figures 1 to 3 As shown, the driving assembly includes a photosensitive coupling 310, a developing coupling 320, a developing roller gear 330 and a powder feeding roller gear 340. The driving assembly can be arranged at one or both ends of the processing box in the first direction (length direction). In this embodiment, the driving assembly is arranged at the same end of the developing unit 100 in the length direction, that is, the driving end (the end in the A1 direction). The photosensitive coupling 310 is arranged at one end of the photosensitive drum in the A1 direction, and is used to mesh with the photosensitive driving head of the electronic imaging device to receive the driving force and drive the photosensitive drum to rotate. The developing coupling 320, the developing roller gear 330, and the powder feeding roller gear 340 are arranged on the outer side of the developing bearing 120. Specifically, the developing bearing 120 is provided with a supporting hole for supporting the developing coupling 320. The developing coupling 320 is used to mesh with the developing drive head of the electronic imaging device and receive the driving force. The developing coupling 320 is located at a position approximately in the middle of the developing unit 100 in the third direction. The developing roller gear 330 is sleeved on one end of the developing roller shaft extending from the developing bearing 120, and the powder feeding roller gear 340 is sleeved on one end of the powder feeding roller shaft extending from the developing bearing 120. The developing roller gear 330 and the powder feeding roller gear 340 are directly or indirectly meshed with the developing coupling 320, so that the developing coupling 320 transmits the received driving force, thereby driving the developing roller and the powder feeding roller to rotate. In the third direction, the developing coupling 320 is located on the upper side (the C1 side) of the photosensitive coupling 310.

[0108] like Figures 3 to 5As shown, specifically, a positioning portion 121 is provided on one side of the outer side (facing away from the developing frame 110) of the developing bearing 120, and the developing coupling is sleeved on the positioning portion 121 and fixedly mounted on the positioning portion 121 through a connecting assembly. The positioning portion 121 is a cylindrical structure protruding along the A1 direction on the developing bearing 120, and the interior of the positioning portion 121 is hollow. An annular flange 122 protruding toward the axial direction of the positioning portion 121 is provided at one end of the positioning portion 121 away from the developing frame 110, and a through hole is formed in the middle of the annular flange 122, and the inner diameter of the through hole is smaller than the inner diameter of the positioning portion 121. The developing coupling 320 includes a gear portion 321, a driving force receiving portion 322, a hollow portion 323, and a mounting portion 324. Among them, the inner diameter of the hollow portion 323 is adapted to the outer diameter of the positioning portion 121, the developing coupling is sleeved on the outside of the positioning portion 121 (cylindrical structure) through the hollow portion 323, the driving force receiving portion 322 is arranged at one end of the hollow portion 323 away from the developing frame 110, and the driving force receiving portion 322 can be a triangular protrusion, which is used to engage with the developing drive head of the electronic imaging device to receive the driving force; the gear portion 321 is arranged on the outer circumferential surface of the hollow portion 323, and the gear portion 321 can be a two-stage gear, wherein the first-stage gear is engaged with the developing roller gear 330, and the other-stage gear is engaged with the powder feeding roller gear 340. The mounting portion 324 is disposed in the hollow portion 323. The mounting portion 324 is a cylindrical protrusion. The mounting portion 324 protrudes from the inner end surface of the hollow portion 323 in the direction A2. The outer diameter of the mounting portion 324 matches the inner diameter of the through hole formed by the annular flange 122 on the positioning portion 121. When the developing coupling is sleeved on the positioning portion 121, at least part of the mounting portion 324 is inserted into the positioning portion 121 from the through hole. The connecting assembly is located in the positioning portion 121. The connecting assembly includes a connecting member 123 and a gasket 124. The gasket 124 abuts against the end of the portion of the mounting portion 324 extending into the positioning portion 121. The connecting member 123 passes through the gasket 124 and is fixedly connected to the mounting portion 324. The connecting member 123 may be a pin, a screw, a bolt, etc. The gasket 124 is an annular metal sheet (preferably a steel sheet), and its outer diameter is larger than the inner diameter of the annular flange 122 of the positioning portion 121, which can prevent the developing coupling from coming out of the positioning portion 121. When the developing coupling receives the driving force of the electronic imaging device to rotate, it drives the gasket 124 and the connecting member 123 to rotate together. Lubricating oil can be added to the gasket 124 to reduce the friction between it and the inside of the positioning portion 121, so that the developing coupling rotates more smoothly.

[0109] like Figures 1 to 3As shown, a developer cover 130 is also provided on the outside of the developer bearing 120. The developer cover 130 covers the developer roller gear 330, the powder feeding roller gear 340 and a part of the developer coupling 320, and can protect the driving assembly. Specifically, the developer cover 130 can cover the lower side or the front lower side of the gear portion 321 of the developer coupling 320, but the upper rear side of the developer cover 130 is a notch and cannot cover the upper rear side of the gear portion 321 of the developer coupling 320. Therefore, a tooth guard portion 125 is also provided on the side of the developer bearing 120 facing away from the developer frame 110. The tooth guard portion 125 is an arc-shaped protrusion or an L-shaped protrusion protruding along the A1 direction. The tooth guard portion 125 is located on the upper rear side of the gear portion 321, and can cover the part of the gear portion 321 that the developer cover 130 cannot cover, so as to better protect the gear portion 321. It should be noted that the developer protective cover 130 only serves to cover and protect the developer coupling 320 , and there is no contact portion between the two. Therefore, the developer protective cover 130 does not have the function of supporting the developer coupling 320 .

[0110] like Figures 1 to 3 , Figure 6 As shown, the conductive side end cap 230 and the driving side end cap 220 are respectively fixedly connected to the two ends of the photosensitive frame 210, and the conductive side end cap 230 is at least partially covered outside the conductive side bracket 140, and the driving side end cap 220 is at least partially covered outside the developing protective cover 130. When viewed along the length direction of the process cartridge, a part of the developing protective cover 130 overlaps with a part of the developing coupling 320, and another part of the developing protective cover 130 overlaps with a part of the driving side end cap 220. The driving side end cap 220 and the conductive side end cap 230 cover at least a part of the end of the photosensitive frame 210 and the developing frame 110, respectively.

[0111] like Figures 1 to 3 As shown, the driving side end cover 220 is provided with a first through hole 221 and a notch 222. When the driving side end cover 220 is installed at the end of the developing frame 110 and the photosensitive frame 210, a part of the photosensitive coupling 310 is exposed through the first through hole 221, and a part of the developing coupling 320 is exposed through the notch 222, so that the coupling engages with the driving head of the electronic imaging device to receive the driving force. The notch 222 extends upward and backward from the position corresponding to the developing coupling 320 to the upper end and / or the rear end of the driving side end cover 220, that is, a vacant part is provided on the driving side end cover 220, and most of the developing protective cover 130 is exposed through the notch 222. Through the notch 222, the internal structure of the process box (especially the internal structure of the developing coupling 320) can be observed to a certain extent. In the case of partial maintenance, it can be achieved without removing the driving side end cover 220, making the maintenance more convenient.

[0112] When the electronic imaging device is working, the developing roller and the photosensitive drum need to be in close contact. When the electronic imaging device is not working, the developing roller and the photosensitive drum need to be separated by a certain distance to avoid long-term contact between the developing roller and the photosensitive drum, which may cause the photosensitive drum to be contaminated by excess developer attached to the developing roller, or the developing roller to be deformed or the photosensitive drum to be worn.

[0113] Based on this, the drum unit 200 and the developing unit 100 in this embodiment are configured to be able to move relative to each other, so that the developing roller and the photosensitive drum can be in contact when the electronic imaging device is working and separated when not working. When the process cartridge is installed in the electronic imaging device, the drum unit 200 abuts against the components in the electronic imaging device, and the drum unit 200 is immovable. The developing unit 100 is configured to be able to move between a first position and a second position relative to the drum unit 200. When the developing unit 100 is in the first position, the developing roller is in contact with the photosensitive drum; when the developing unit 100 is in the second position, the developing roller is separated from the photosensitive drum.

[0114] like Figures 1 to 3 , Figure 6 As shown, in this embodiment, the process cartridge further includes a connecting portion, a separating member 400 and an elastic member 500, which are used to realize the movement of the developing unit 100 between a first position and a second position relative to the drum unit 200; in the first position, the developing roller contacts the photosensitive drum; in the second position, the developing roller is separated from the photosensitive drum. When viewed along the axial direction (first direction) of the developing roller, the connecting portion does not overlap with the developing coupling 320.

[0115] like Figures 1 to 3 , Figure 6 As shown, in this embodiment, the connection part is used to make the developing unit and the drum unit swingably connected, and the connection part includes a first support part 610 and a first guide part 620 provided at the driving end of the developing unit 100, and a second support part 630 and a second guide part 640 provided at the conductive end of the developing unit 100. Preferably, the first support part 610 is provided near one end of the developing cover 130 in the third direction, specifically, at a position on the end surface of the developing cover 130 close to its lower end. A first guide portion 620 that cooperates with the first support portion 610 is provided on the driving side end cover 220. The first support portion 610 moves within the range of the first guide portion 620. The first guide portion 620 is located at the lower side of the notch portion 222 in the third direction, and the first support portion 610 corresponds to the position of the first guide portion 620 and is also located at the lower side of the notch portion 222. That is, when observed along the axial direction of the developing roller, the first support portion 610 and the first guide portion 620 are always located at the lower side of the notch portion 222 and have no overlapping part with the notch portion 222, and the developing coupling 320 is within the range of the notch portion 222. Therefore, when observed along the axial direction of the developing roller, the first support portion 610 and the first guide portion 620 have no overlapping part with the developing coupling 320.

[0116] like Figures 1 to 3 As shown, the first support portion 610 is a columnar component formed on the end surface of the developer cover 130 (i.e., the first support portion 610 is a support column), which is preferably cylindrical, but can also be other multi-faceted prism structures. The first guide portion 620 is a through hole or a through groove formed on the drive side end cover 220, and the through hole or the through groove is an arc-shaped hole or an arc-shaped groove. The first guide portion 620 extends approximately along the second direction. During assembly, the first support portion 610 is embedded in the first guide portion 620. The range of the first guide portion 620 limits the moving range of the first support portion 610, that is, limits the swing range of the developer unit 100 relative to the drum unit 200.

[0117] In some other implementations, the first supporting portion 610 may be disposed on the driving side end cover 220 , and the first guiding portion 620 may be disposed on the developing protective cover 130 .

[0118] like Figure 6 As shown, the second support portion 630 is a columnar component formed on the end surface of the conductive side bracket 140, preferably a cylindrical shape, or other multi-faceted prism structures. The second support portion 630 is arranged closer to the upper end of the developing unit 100 in the third direction. The conductive side end cover 230 is provided with a second guide portion 640 that matches the first support portion 610. The position of the second guide portion 640 corresponds to the second support portion 630 and is also arranged close to the upper end of the developing unit 100. The second guide portion 640 is a circular hole or a circular groove. When assembled, the second support portion 630 is embedded in the second guide portion 640. The second support portion 630 and the second guide portion 640 form the rotation center of the developing unit relative to the drum unit. Observed along the axial direction of the developing roller, the second support portion 630 and the second guide portion 640 have no overlapping parts with the developing coupling 320.

[0119] In some other embodiments, the second supporting portion 630 may be disposed on the conductive side end cover 230 , and the second guiding portion 640 may be disposed on the conductive side bracket 140 .

[0120] like Figure 3 As shown, the movement of the developing unit 100 from the first position to the second position is achieved by the cooperation of the separating member 400 and the force applying member in the electronic imaging device. Specifically, the developing unit 100 is provided with a separating member 400 at one or both ends in the length direction. The separating member 400 can be provided below the developing frame 110 or below the end cover. Preferably, the separating member 400 can be movably provided on the end surface of the developing unit 100. The separating member 400 can be a strip arm or a block, one end of which is hinged to the developing unit 100, and the other end can drive the developing unit 100 to move from the first position to the second position in the direction away from the drum unit 200 when receiving the force (separation force) of the force applying member, so that the developing roller is separated from the photosensitive drum.

[0121] In this embodiment, the separator 400 can be hinged to the lower end of the developer protective cover 130, and the separator 400 can also be not arranged on the developer protective cover 130. A support shaft is arranged on the end surface of the developer unit 100, and one end of the separator 400 is sleeved on the support shaft, which can also complete the installation of the separator 400. A part of the free end of the separator 400 is exposed outside the developer frame 110 from below, so that the force applying member can contact it from below and apply force to it.

[0122] like Figure 2 As shown, an elastic member 500 is further provided between the drum unit 200 and the developing unit 100, and is used to move the developing unit 100 from the second position to the first position, and drive the developing roller to contact the photosensitive drum. Specifically, one end of the elastic member 500 is connected to the upper end of the photosensitive frame 210, and the other end is connected to the upper end of the developing frame 110. The elastic member 500 is preferably a spring, and may also be a member capable of providing elastic force, such as elastic rubber, elastic sponge, or shrapnel.

[0123] When the electronic imaging device is not working, the force-applying member contacts the separation member 400 from below and applies force to it. After the force is applied, the lower end of the developing unit 100 swings in a direction away from the drum unit 200 (roughly along the B2 direction), driving the developing roller to separate from the photosensitive drum. The upper end of the developing unit 100 moves in a direction close to the photosensitive drum (roughly along the B1 direction), compressing the elastic member 500. At the same time, the first support portion 610 moves from one end in the B1 direction to the other end in the B2 direction in the first guide portion 620, and the second support portion 630 rotates in the second guide portion 640. The connecting portion plays a supporting and positioning role during the movement of the developing unit 100.

[0124] When the electronic imaging device needs to work, the force exerted by the force applying member on the separating member 400 is removed, and at the same time, the elastic member 500 recovers its elastic deformation, pushing the developing unit 100 to move from the second position to the first position, and the developing roller contacts the photosensitive drum. At the same time, the first supporting portion 610 moves from one end in the B2 direction to one end in the B1 direction in the first guiding portion 620, and the second supporting portion 630 rotates in the opposite direction in the second guiding portion 640. The developing unit 100 is kept in the first position under the force of the elastic member 500, and the developing roller is always in close contact with the photosensitive drum.

[0125] The developing coupling 320 of the processing box of this embodiment can be rotatably fixedly mounted on the developing bearing 120. The developing coupling 320 is not supported by the developing cover 130, which solves the technical problem in the prior art that the developing coupling 320 is not accurately positioned and the driving force cannot be stably transmitted due to structural defects of the developing bearing 120 or the developing cover 130 itself.

[0126] Embodiment 2

[0127] This embodiment provides another processing box, which is different from the first embodiment in that the structure of the connecting part is different, the position of the tooth guard part is different, and it also includes a limiting part and a restricted part.

[0128] like Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, in this embodiment, the connecting portion includes a third supporting portion 650 and a third guiding portion 660 disposed at the driving end of the process cartridge and a fourth supporting portion 670 and a fourth guiding portion 680 disposed at the conductive end of the process cartridge. In which, when viewed along the axial direction (first direction) of the developing roller, the connecting portion does not overlap with the developing coupling 320.

[0129] Specifically, Fig. 9 and Fig.10 As shown, the third supporting portion 650 is disposed on the photosensitive frame 210, and an extension portion 240 is disposed on the side of the photosensitive frame 210 facing the developing unit 100. The extension portion 240 is generally a strip-shaped member, and the extension portion 240 extends along the second direction. The extension portion 240 can extend to the developing frame 110, and a avoidance groove 150 for avoiding the extension portion 240 is disposed on the developing frame 110, that is, one end of the extension portion 240 is inserted into the avoidance groove 150, and the extension portion 240 is disposed close to the upper end of the photosensitive frame 210, and the avoidance groove 150 is also close to the upper end position of the developing frame 110. When the developing unit 100 moves between the first position and the second position relative to the drum unit 200, one end of the extension portion 240 also slides relative to the avoidance groove 150.

[0130] like Fig. 9 and Fig.10 As shown, the third support portion 650 is arranged on the surface of the portion of the extension portion 240 inserted into the avoidance groove 150. The third support portion 650 is a columnar component formed on the surface of the extension portion 240 in the first direction, preferably cylindrical, and may also be other multi-faceted prism structures. The third guide portion 660 is a through hole or through groove formed on the groove wall of the avoidance groove 150 in the first direction. The third guide portion 660 is an arc groove or an arc hole. The third guide portion 660 extends roughly along the second direction. During assembly, one end of the extension portion 240 is inserted into the avoidance groove 150, and the third support portion 650 is embedded in the third guide portion 660. The range of the third guide portion 660 limits the movement range of the third support portion 650, that is, limits the swing range of the developing unit 100 relative to the drum unit 200.

[0131] like Fig. 9 and Fig.10As shown, in this embodiment, the structures of the fourth support portion 670 and the fourth guide portion 680 located at the conductive end are the same as the structures and movement modes of the third support portion 650 and the third guide portion 660, and are not described again herein.

[0132] In this embodiment, the tooth guard 125 is provided on the developer protective cover 130 instead of the developer bearing 120. The tooth guard 125 is provided on the side of the developer protective cover 130 facing away from the developer frame 110. The tooth guard 125 is a semi-ring flange protruding along the A1 direction. The tooth guard 125 is located on the side of the gear part 321 of the developer coupling 320 away from the photosensitive drum, and can play a role in protecting the gear part 321. It should be noted that the developer protective cover 130 of this embodiment only plays a role in covering and protecting the developer coupling 320, and there is no contact part between the two. Therefore, the developer protective cover 130 does not have the function of supporting the developer coupling 320.

[0133] Further, such as Figure 7 , Figure 8 , Figures 10 to 12 As shown, the process cartridge further includes a limiting portion 250 and a restricted portion 160. The drum unit 200 is provided with the limiting portion 250, and the developing unit 100 is provided with the restricted portion 160 matched with the limiting portion 250. The limiting portion 250 contacts the restricted portion 160 when the developing unit 100 moves from the second position to the first position. In this embodiment, the limiting portion 250 and the restricted portion 160 have two groups, which are respectively arranged at the driving end and the conductive end of the process cartridge. At the driving end, the photosensitive frame 210 is provided with a limiting portion 250 at the upper edge position in the third direction. The limiting portion 250 is a protruding structure. The developing cover 130 is provided with the restricted portion 160 matched with the limiting portion 250. The restricted portion 160 is a protrusion formed on the outer wall of the developing cover 130. The restricted portion 160 extends along the A1 direction. In the second direction, the limiting portion 250 is located at the rear side (one side along the B2 direction) of the restricted portion 160. At the conductive end, the limiting portion 250 is disposed at the upper edge of the photosensitive frame 210 in the third direction, and the restricted portion 160 is disposed at the upper edge of the developing frame 110 in the third direction. The restricted portion 160 is a protrusion extending along the A2 direction. In the second direction, the limiting portion 250 is located at the rear side (one side along the B2 direction) of the restricted portion 160. The restricted portion 160 contacts the limiting portion 250 when the developing unit 100 moves from the second position to the first position or from the first position to the second position. When the two contact, the movement of the developing unit 100 stops, that is, the limiting portion 250 contacts the restricted portion 160 to play a limiting role, preventing the developing unit 100 from deviating from the first position or the second position when moving.

[0134] Further, such as Figure 7As shown, an arc-shaped protrusion 170 is provided on the side of the developing unit 100 away from the drum unit 200, that is, the arc-shaped protrusion 170 is arranged on the side of the developing frame 110 away from the drum unit 200, and is respectively arranged at both ends of the developing frame 110 in the length direction, and the surface of the arc-shaped protrusion 170 away from the developing frame 110 is an arc surface. When the processing cartridge is installed on the tray of the electronic imaging device, the arc surface of the arc-shaped protrusion 170 abuts against the partition on the tray, and when the developing unit 100 moves relative to the drum unit 200, the arc surface of the arc-shaped protrusion 170 moves relative to the partition of the tray. The arc-shaped protrusion 170 is arranged to abut against the partition of the tray, which can assist the swinging movement of the developing unit 100 relative to the drum unit 200, so that when the developing unit 100 receives the separation force of the electronic imaging device, it can swing around the connection part as the center, rather than being driven by the separation force to move in a direction away from the drum unit 200, so as to achieve a better drum-roller separation effect.

[0135] like Figures 7 to 12 As shown, when the electronic imaging device is not working, the force-applying member contacts the separating member 400 from below and applies force to it. After the force is applied, the lower end of the developing unit 100 swings in a direction away from the drum unit 200 (roughly along the B2 direction), driving the developing roller to separate from the photosensitive drum, and the upper end of the developing unit 100 moves in a direction close to the photosensitive drum (roughly along the B1 direction), compressing the elastic member 500, and the limiting portion 160 moves along the B1 direction with the movement of the developing unit 100 and separates from the limiting portion 250; at the same time, the third supporting portion 650 moves from one end in the B1 direction to one end in the B2 direction in the third guiding portion 660, and the fourth supporting portion 670 moves from one end in the B1 direction to one end in the B2 direction in the fourth guiding portion 680; the connecting portion plays a supporting and positioning role during the movement of the developing unit 100.

[0136] like Figures 7 to 12 As shown, when the electronic imaging device needs to work, the force exerted by the force applying member on the separating member 400 is removed, the elastic member 500 recovers its elastic deformation, and pushes the developing unit 100 to move from the second position to the first position, and the developing roller contacts the photosensitive drum. At the same time, the third supporting portion 650 moves from one end in the B2 direction to one end in the B1 direction in the third guiding portion 660, and the fourth supporting portion 670 moves from one end in the B2 direction to one end in the B1 direction in the fourth guiding portion 680. The restricted portion 160 moves with the developing unit to contact the restricting portion 250, so that the developing unit 100 cannot continue to move after reaching the first position, and remains in the first position under the force of the elastic member 500, and the developing roller is always in close contact with the photosensitive drum.

[0137] Embodiment 3

[0138] This embodiment provides a processing box, which is different from the first embodiment in that the connecting component and the structure that cooperates with the connecting component are different.

[0139] In this embodiment, Figures 13 to 15 As shown, the developing coupling 320 includes a power receiving part 322 and a gear part 321. The power receiving part 322 is located at one end of the gear part 321 away from the developing bearing 120. An engaging protrusion 3221 is provided on the power receiving part 322. The engaging protrusion 3221 can be a triangular protrusion, which is used to engage with the developing drive head of the electronic imaging device to receive the driving force for rotation. The gear part 321 and the power receiving part 322 are an integrally formed structure. The teeth of the gear part 321 are arranged on its outer circumferential surface. The gear part 321 can be a two-stage gear. The two-stage gears are respectively engaged with the developing roller gear 330 and the powder feeding roller gear 340. When the power receiving part 322 rotates, the gear part 321 rotates synchronously and drives the developing roller gear 330 and the powder feeding roller gear 340 to rotate. The gear portion 321 is hollow inside, and a connecting hole 3224 is provided in the center of the power receiving portion 322, which extends axially and penetrates the power receiving portion 322. The connecting hole 3224 is used for allowing a connecting component to pass through to install the developing coupling 320. The connecting component overlaps with the rotation axis of the developing coupling. In this embodiment, the connecting component is a connecting member 123, which may be a pin, a screw, a bolt, etc.

[0140] like Fig.14 and Fig.16 As shown, a positioning portion 121 that matches with the connecting assembly is provided on the developing frame. In this embodiment, the positioning portion 121 is provided on the outer side (the side facing away from the developing frame 110) of the developing bearing 120, and the developing coupling 320 is sleeved on the positioning portion 121 and installed on the positioning portion 121 through the connecting assembly. The positioning portion 121 is a cylindrical connecting column protruding along the A1 direction on the developing bearing 120. When the developing coupling is sleeved on the positioning portion 121, the connecting hole 3224 of the power receiving portion 322 is aligned with the positioning portion 121, and the connecting member 123 passes through the connecting hole 3224 from the outer side (the A1 direction side) and is connected to the positioning portion 121, so that the developing coupling 320 is installed on the developing bearing 120.

[0141] The processing box of this embodiment fastens the developing coupling 320 to the developing frame through a connecting assembly, the positioning of the developing coupling 320 is more stable, and the connecting assembly is close to the rotation axis of the developing coupling 320, so that the rotation speed is slower and the connecting assembly and the developing coupling 320 are less worn.

[0142] Embodiment 4

[0143] This embodiment provides another processing box, which is different from the first embodiment in that the structure of the developing coupling and the connection position of the connecting component are different.

[0144] like Figures 17 to 20 As shown, in this embodiment, the developing coupling 320 includes a power receiving part 322 and a gear part 321, and the power receiving part 322 and the gear part 321 are separately arranged. The gear part 321 is sleeved on the positioning part 121 of the developing bearing 320, and the connecting component (connecting part 123) passes through the gear part 321 from the inside of the gear part 321 to fix the gear part 321 on the positioning part 121 of the developing bearing 120.

[0145] like Figures 17 to 19 As shown, the power receiving part 322 is engaged and connected to the end of the gear part 321 away from the developing bearing 120, and the power receiving part 322 is located on the outside of the connecting assembly (the side in the A1 direction, away from the developing bearing 120). The gear part 321 is provided with at least one coupling part 3211, and the power receiving part 322 is provided with at least one engaging part 3222 engaged with the coupling part 3211. The coupling part 3211 is a slot / hole provided on the inner wall of the gear part 321, and the engaging part 3222 is a buckle provided on the power receiving part 322. The buckle is provided on the side of the power receiving part 322 facing the developing bearing 120. When the power receiving part 322 is inserted from the outside of the gear part 321 (inserted along the A2 direction) into the inside of the gear part 321, the buckle is embedded in the slot, so that the power receiving part 322 is installed on the gear part 321. There are multiple engaging parts 3222, which are arranged at intervals along the circumference of the power receiving part 322, and a matching number of coupling parts 3211 are also set at corresponding positions on the inner wall of the gear part 321. In this embodiment, the number of the engaging parts 3222 and the coupling parts 3211 are both three.

[0146] Further, such as Figures 17 to 19As shown, at least one limiting portion 3212 is provided on the inner wall of the gear portion 321, and at least one limited portion 3223 matched with the limiting portion 3212 is provided on the power receiving portion 322, so that the gear portion 321 can be driven by the power receiving portion 322 to rotate synchronously. The limiting portion 3212 is a slot provided on the inner wall of the gear portion 321, and the slot extends along the first direction. The limited portion 3223 is a convex block matched with the slot, and the convex block is provided on the circumferential surface of the power receiving portion 322 facing the developing bearing 120. In the first direction, the limited portion 3223 is closer to the engaging protrusion 3221 than the engaging portion 3222; the limiting portion 3212 is farther from the developing bearing 120 than the combining portion 3211 in the first direction, and one end of the limiting portion 3212 in the A1 direction is flush with one end of the gear portion 321 in the A1 direction. The number of the limiting part 3212 and the limited part 3223 can be multiple (preferably three), which are arranged on the gear part 321 and the power receiving part 322 at intervals along the circumferential direction. The limiting part 3212 and the connecting part 3211 do not overlap in the circumferential direction, and the limited part 3223 and the engaging part 3222 do not overlap in the circumferential direction. The cooperation between the limiting part 3212 and the limited part 3223 can guide the installation of the power receiving part 322. During installation, the limited part 3223 is aligned with the limiting part 3212 and inserted, and the power receiving part 322 moves along the limited part 3223 along the A2 direction until the engaging part 3222 engages with the connecting part 3211, and the power receiving part 322 is installed in place.

[0147] After the power receiving part 322 is engaged with the gear part 321, the engagement between the limiting part 3212 and the limited part 3223 can prevent the power receiving part 322 and the gear part 321 from generating relative movement in the circumferential direction, that is, it can play a driving role, that is, the power receiving part 322 can drive the gear part 321 to rotate through the cooperation of the limiting part 3212 and the limited part 3223, thereby transmitting the driving force received by the power receiving part 322 through the gear part 321.

[0148] The other structures of the processing box of this embodiment are the same as those of the first embodiment and will not be described again.

[0149] Embodiment 5

[0150] This embodiment provides another processing box, which is different from the fourth embodiment in that the developing coupling is installed on the developing frame 110.

[0151] like Fig.21 and Fig. 22As shown, in this embodiment, the developing frame 110 includes a positioning portion 121a that cooperates with the connecting assembly, and the positioning portion 121a is arranged on the developing frame 110; the positioning portion 121a is a cylindrical connecting column formed on the side of the developing frame 110 in the A1 direction, and the positioning portion 121a protrudes along the A1 direction. A through hole for the positioning portion 121a to extend out is provided at a position on the developing bearing 120 corresponding to the positioning portion 121a, and the positioning portion 121a at least partially extends to the outside of the developing bearing 120.

[0152] The gear portion 321 is sleeved on the portion of the positioning portion 121a extending to the outside of the developing bearing 120, and then passes through the gear portion 321 from the inside of the gear portion 321 through a connecting component (connecting piece 123) and is fixed on the positioning portion 121a, and then the power receiving portion 322 is snap-connected to the gear portion 321.

[0153] The other structures of the processing box of this embodiment are the same as those of the first embodiment and will not be described again.

[0154] Embodiment 6

[0155] This embodiment provides a processing box, which is different from the fourth embodiment in that the connection position of the connecting component is different.

[0156] like Figure 23 to Figure 25 As shown, in this embodiment, a supporting portion 127 for supporting the developing coupling 320 is provided on the developing bearing 120, and the supporting portion 127 is a pillar protruding from the developing coupling 320, and the developing coupling 320 is sleeved on the supporting portion 127. The developing bearing 120 is also provided with a positioning portion 121b that cooperates with the connecting assembly, and the positioning portion 121b is located on one side of the supporting portion 127, specifically, the rear upper side. When the developing coupling 320 is supported on the supporting portion 127, the positioning portion 121b is also located on the rear upper side of the developing coupling 320. Preferably, the positioning portion 121b is located at the bending position of the L-shaped tooth guard portion 125.

[0157] like Figure 23 to Figure 25 As shown, when the connecting assembly (connecting member 123) is connected to the positioning portion 121b, the connecting member 123 at least partially overlaps with the developing coupling 320 in the first direction and abuts against the developing coupling 320. Specifically, the gear portion 321 of the developing coupling 320 has a circle of flange 3213 at one end away from the developing bearing 120, and at least a portion of the connecting member 123 is located on the A1 side of the flange 3213 and abuts against the flange 3213, thereby preventing the developing coupling 320 from coming off the supporting portion 127.

[0158] The connecting member 123 can be a bolt with a gasket, or a bolt with a larger nut diameter. During assembly, a portion of the gasket or the nut overlaps and abuts against the developing coupling.

[0159] In this embodiment, the rotation axis of the connecting member 123 and the developing coupling 320 do not overlap, but are close to the rotation axis of the developing coupling 320, so that the rotation speed is slower and the wear of the connecting member 123 and the developing coupling 320 is less.

[0160] The other structures of the processing box of this embodiment are the same as those of the first embodiment and will not be described again.

[0161] Embodiment 7

[0162] This embodiment provides another processing box, which is different from the sixth embodiment in that the structure of the connecting component is different.

[0163] like Fig.26 and Fig. 27 As shown, in this embodiment, the connecting component includes a connecting member 123 and abutting member 126. The connecting member 123 fixes the abutting member 126 on the developing bearing 120. A hole is provided on the abutting member 126. During installation, the hole is aligned with the positioning portion 121b. The connecting member 123 passes through the hole and the positioning portion 121b in sequence from the outside to fix the abutting member 126 on the positioning portion 121b.

[0164] like Fig.26 and Fig. 27 As shown, the shape of the abutment 126 is matched with the tooth guard portion 125 and covers the outside of the tooth guard portion 125. An abutment surface 1261 is further provided at the end of the abutment 126 away from the developing bearing 120. At least a portion of the abutment surface 1261 extends to a position overlapping with the developing coupling 320. The edge of the abutment surface 1261 close to the developing coupling 320 is an arc-shaped edge matched with the developing coupling. The central angle corresponding to the arc-shaped edge is approximately 90°, that is, the central angle corresponding to the portion where the abutment surface 1261 abuts against the flange 3213 of the gear portion 321 of the developing coupling 320 is approximately 90°. Compared with Example 6, the area where the connecting component overlaps and abuts against the developing coupling 320 is increased, so that the developing coupling 320 can be installed more firmly on the developing bearing 120.

[0165] The other structures of the processing box of this embodiment are the same as those of the first embodiment and will not be described again.

[0166] Embodiment 8

[0167] The process cartridge in the above-mentioned embodiment uses an elastic member to realize the contact between the developing roller and the photosensitive drum and reset the separation member, which will cause problems such as high cost and short life of the elastic member, and long-term use will affect the stability of the machine. Based on this, this embodiment provides a process cartridge that does not rely on an elastic member to make the developing roller contact the photosensitive drum.

[0168] like Figures 28 to 39As shown, this embodiment provides a processing box, which is different from the first embodiment in that the connecting part, the separating part and the structure cooperating therewith are different.

[0169] In this embodiment, the developing unit 100 is configured to translate between the first position and the second position relative to the drum unit 200; the translation of the developing unit 100 relative to the drum unit 200 has a component along the gravity direction, that is, the translation direction has a component in the third direction. The developing unit 100 can move downward from the second position to the first position under the action of its own gravity and remain in the first position, and the developing roller 180 is in contact with the photosensitive drum 260. The developing unit 100 moves upward from the second position to the first position under the action of the separation force received by the separating member 400, and the developing roller 180 is separated from the photosensitive drum 260.

[0170] like Fig.32As shown, the separator 400 is a slider structure, which is divided into two parts, the upper part is a sliding structure, and has a first abutting inclined surface 410, which is located on the B2 direction side (rear side) of the separator 400, and the first abutting inclined surface 410 is inclined from the B1 and C1 directions to the B2 and C2 directions. The first abutting inclined surface 410 is used to abut against the developing unit 100 to lift the developing unit 100. A chamfered structure is also provided on the B1 direction side of the separator 400 to avoid interference, so that the upper part of the separator 400 constitutes a roughly trapezoidal structure, that is, a shape that is narrow at the top and wide at the bottom. The lower part of the separation member 400 has an abutment portion 420, which is used to abut with the force-applying member 900 of the electronic imaging device and receive the separation force from the force-applying member 900. The abutment portion 420 has an avoidance surface 421 and a force receiving surface 422. The avoidance surface 421 is located on the A1 direction side of the abutment portion 420 (set away from the developing frame 110). The avoidance surface 421 is an inclined surface. Optionally, the avoidance surface 421 is constructed as a curved surface. The force-applying member 900 can move along the avoidance surface 421. When the force-applying member 900 moves along the B1 direction, that is, when it moves in the positive direction, the abutting portion 420 will swing slightly, so as to facilitate the force-applying member 900 to pass through the separating member 400 along the avoidance surface 421. It can also be understood that the force-applying member 900 avoids by slightly swinging the avoidance surface 421. When the separating member 400 slightly swings, it contacts the developing unit 100 through the first abutting inclined surface 410, and there is a pushing force between the two, but the developing unit 100 00's pushing force on the separating member 400 (the force applied by the deadweight of the developing unit 100) is smaller than the pushing force of the force-applying member 900 on the avoiding surface 421, so the separating member 400 is pushed to avoid. After the force-applying member 900 moves to be separated from the avoiding surface 421, the separating member 400 is reset to its initial position under the action of the gravity of the developing unit 100 (which produces a pushing effect on the separating member 400). At this time, the separating member 400 is in a position where the force receiving surface 422 can abut against the force-applying member 900. The force receiving surface 422 is located on the B1 direction side of the abutment portion 420, and the force receiving surface 422 is connected to the avoidance surface 421, and adopts a planar structure. When the force-applying member 900 moves in the opposite direction (moves along the B2 direction), the force-applying member 900 abuts against the force receiving surface 422 and applies a separation force, so that the separation member 400 has a tendency to move, thereby having a component of movement along the B2 direction and the C1 direction. When the force-applying member 900 stops applying force, the separation member 400 no longer receives the separation force. Due to the abutment effect of the first abutment slope 410 on the developing unit 100, the first abutment slope 410 has a gravity component returning along the B1 direction after being subjected to the gravity of the developing unit 100, thereby gradually resetting.It can be known that the separating member 400 can move along a certain direction on the driving side end cover 220, that is, the separating member 400 can slide on the driving side end cover 220, and abut against the developing unit 100 through the first abutting slope 410. During the movement in the B2 direction, the inclination angle of the first abutting slope 410 is utilized to make the developing unit 100 have a thrust for moving in the B2 direction and the C1 direction, thereby lifting the developing unit 100 upward.

[0171] Further, such as Fig.33 and Fig.34 As shown, in order to limit the moving direction of the separator 400 and facilitate movement on the drive side end cover 220, a slide 223 is provided on the drive side end cover 220. The slide 223 is a moving track on the C2 direction side of the drive side end cover 220. The extension direction of the slide 223 is along the second direction, providing a moving space for the separator 400, which is adapted to the upper part structure of the separator 400, that is, the upper part of the separator 400 can move in the slide 223, and the lower part of the separator 400 is used to receive the separation force to move the upper part of the separator 400, thereby prompting the first abutting slope 410 to move and lift the developing unit 100. At the same time, the slide 223 limits the moving space of the separator 400 in the third direction to prevent the separator 400 from detaching along the third direction. Furthermore, a positioning column 224 is provided in the slide 223, and the positioning column 224 is connected to both sides of the third direction of the slide 223 for presetting the moving direction of the separator 400. In order to cooperate with the positioning column 224, a slide groove 423 is provided on the separator 400, and the slide groove 423 is a groove structure. The slide groove 423 penetrates the upper part of the separator 400 and the B2 direction side of the upper part of the separator 400 in the third direction, that is, the slide groove 423 extends to the first abutting inclined surface 410. When in use, the positioning column 224 is located in the slide groove 423, and the circumferential side surface of the positioning column 224 abuts against the inner wall of the slide groove 423, that is, when the separator 400 moves along the second direction, the positioning column 224 can move relative to the separator 400 along the slide groove 423. The positioning column 224 and the slide groove 423 define the moving direction of the separator 400, provide a preset sliding trajectory for the separator 400, and avoid excessive deviation of the separator 400. Of course, the structures of the positioning column 224 and the sliding groove 423 are not limited, as long as they can be adapted to each other.

[0172] In this embodiment, Fig.38As shown, the first abutment slope 410 abuts against the developing bearing 120, and the developing roller 180 and the photosensitive drum 260 are separated by lifting the developing bearing 120, wherein the developing bearing 120 has a second abutment slope 128, and the second abutment slope 128 is located on the C2 direction side (lower side) of the developing bearing 120, and the second abutment slope 128 is parallel to the first abutment slope 410 and abuts against the first abutment slope 410. When the separating member 400 moves along the B2 direction, the first abutment slope 410 and the second abutment slope 128 fit each other and slide along the second abutment slope 128, so that the second abutment slope 128 is gradually lifted.

[0173] Further, such as Fig.36 As shown, in this embodiment, the developing unit 100 and the drum unit 200 are movably connected through a connecting portion, and the developing unit 100 and the drum unit 200 can move relative to each other in the third direction. Specifically, the connecting portion includes a fifth supporting portion 190 and a fifth guiding portion 270. The developing bearing 120 is provided with a fifth supporting portion 190, and the photosensitive frame 210 is provided with a fifth guiding portion 270. The fifth supporting portion 190 and the fifth guiding portion 270 are plugged and matched to realize the detachable connection between the developing bearing 120 and the photosensitive frame 210, and can adapt to the separation member 400 lifting the developing unit 100 without being separated from each other. In this embodiment, the fifth supporting portion 190 is constructed as a protrusion 190, and the protrusion 190 is closer to the C1 direction side of the developing bearing 120. In the second direction, the protrusion 190 is located on the B1 direction side of the developing bearing 120. The protrusion 190 is a structure protruding along the A1 direction, and its shape is not limited. The outer contour of the protrusion 190 is provided with a smooth rounded corner structure to facilitate sliding up and down. The fifth guide portion 270 is constructed as a card slot 270, which is a groove structure on the photosensitive frame 210. The card slot 270 is closer to the C1 direction side of the photosensitive frame 210, and the card slot 270 is recessed and extends in the C2 direction. In the second direction, the card slot 270 is located on the B2 side of the photosensitive frame 210, which is adapted to the position of the protrusion 190. The C1 direction side and the A2 direction side of the card slot 270 are both conductive structures, which facilitate the protrusion 190 to be inserted from the upper side and move relative to each other in the third direction. It can be seen that the protrusion 190 is engaged with the card slot 270 to realize the movably connected development unit 100 and the drum unit 200. When the development unit 100 is lifted by the separator 400, the protrusion 190 moves upward in the card slot 270. Therefore, the cooperation between the protrusion 190 and the card slot 270 provides a translation condition for the movement of the development unit 100. Of course, the fifth support portion can also be configured as a groove structure, and the fifth guide portion can also be configured as a protruding structure, as long as they can be mutually adapted and plugged in. The fifth support portion can also be arranged on the developing frame 110 or the developing protective cover 130, and the fifth guide portion can also be arranged on the end cover.

[0174] Preferably, Fig.37 As shown, a sliding slope 271 is provided in the card slot 270, and the sliding slope 271 is located at the B2 side of the card slot 270, and the inclination direction of the sliding slope 271 is from the C1, B2 direction side to the C2, B1 direction side. The sliding slope 271 can provide a space for the protrusion 190 to move in the B1 direction, that is, it can make the developing roller 180 have an offset space in the B1 direction to achieve a better drum-roller separation effect. Specifically, due to the lifting effect of the first abutting slope 410, the protrusion 190 can slide along the sliding slope 271 when moving upward, so it has a moving component in the B2 direction. The sliding slope 271 makes the card slot 270 form a structure that is wide at the top and narrow at the bottom. In other embodiments, the protrusion 190 may also be configured to have an inclined surface, which is parallel to the sliding inclined surface 271, and the inclined surface of the protrusion 190 is in contact with the sliding inclined surface 271. When the protrusion 190 moves upward, it can better fit the sliding inclined surface 271. Therefore, the protrusion 190 has a moving component moving along the C1 direction and the B2 direction, and can lift the developing unit 100 obliquely upward, thereby improving the separation effect of the developing roller 180 and the photosensitive drum 260. In addition, when the developing unit 100 and the drum unit 200 are detachably connected, that is, when the slot 270 and the protrusion 190 are matched, the developing unit 100 and the drum unit 200 can rely on their own weight to make the developing roller 180 and the photosensitive drum 260 abut against each other, that is, when there is no developing operation, the separating member 400 is used to lift the developing unit 100 to separate the developing roller 180 from the photosensitive drum 260.

[0175] like Figures 28 to 39 As shown, when the process box is loaded into the printer (electronic imaging device), that is, installed in place, the process box is in the initial state (developing roller 180 is in contact with photosensitive drum 260) by its own weight, and the force member 900 moves in the positive direction (moves along the B1 direction), and the force member 900 pushes the separation member 400 to deflect along the avoidance surface 421 of the separation member 400. When the force member 900 moves along the sliding avoidance surface 421 to a position separated from the separation member 400, due to the shape of the first abutting inclined surface 410 and the second abutting inclined surface 128 and the gravity of the entire developing frame 110, the separation member 400 is reset. When the developing work is finished, the force member 900 moves to the B2 direction, as shown in FIG. Fig.38As shown, the force receiving surface 422 of the separator 400 is abutted, thereby pushing the separator 400 to move along the slide 223 in the direction of B2. At the same time, the first abutting slope 410 of the separator 400 pushes the second abutting slope 128 of the developing bearing 120, prompting the developing bearing 120 to move upward along the preset direction of the slot 270 (the protrusion 190 moves along the sliding slope 271), thereby lifting the developing bearing 120 to achieve the drum roller separation of the processing box; when the developing work starts, the electronic imaging device cancels the separation force of the force-applying member 900, and the developing bearing 120 moves downward under the action of gravity. The separator 400 is also reset under the pushing action of the developing bearing 120 and returns to its initial state. It should be noted that the above-mentioned action on the developing bearing 120 is equivalent to the action on the developing frame 110 (the entire developing unit 100).

[0176] Therefore, the processing box of the present application can rely on its own weight to make the developing roller 180 contact with the photosensitive drum 260, that is, the photosensitive drum 260 contacts the developing roller 180 when the electronic imaging device is developing, and the photosensitive drum 260 is separated from the developing roller 180 through the separating member 400 when the developing work is stopped. Because there is no elastic member, the force that needs to be overcome when the machine end is forced to separate is reduced, which effectively improves the life of the machine. The movement and reset of the separating member 400 is achieved by the self-weight of the developing frame 110, and no elastic member is required. Therefore, the structure is simpler and the cost is lower, which eliminates the failure of the elastic member due to the life problem, making the process of installing the processing box and separating the drum and roller more stable.

[0177] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A process cartridge, characterized in that: include: a drum unit having a photosensitive drum and a photosensitive frame; A developing unit having a developing roller and a developing frame, wherein the developing unit is movable relative to the drum unit between a first position where the developing roller contacts the photosensitive drum and a second position where the developing roller and the photosensitive drum are separated; a photosensitive coupling for receiving a rotational driving force and transmitting it to the photosensitive drum; A developing coupling, for receiving a rotational driving force and transmitting it to the developing roller; An end cover is arranged on the outer side of one end of the developing frame, the end cover has a through hole and a notch, and a part of the photosensitive coupling is exposed through the through hole; The developing coupling has a gear portion, and a portion of the gear portion is exposed through the notch portion.

2. The process cartridge according to claim 1, wherein: The developing coupling further comprises a driving force receiving portion, which is a triangular protrusion; the driving force receiving portion is completely exposed through the notch portion.

3. The process cartridge according to claim 1, wherein: A developing bearing is also provided, which is arranged at one end of the developing frame, and a protruding cylindrical structure is provided on one side of the developing bearing; a hollow part is provided on one side of the developing coupling; and the developing coupling is sleeved on the cylindrical structure through the hollow part.

4. The process cartridge according to claim 1 or 3, wherein: A developing cover is also provided, which is arranged between the developing frame and the end cover, and the lower side of the gear part of the developing coupling is covered by the developing cover or the developing cover does not cover the upper rear side of the gear part of the developing coupling.

5. The process cartridge according to claim 1 or 3, wherein: A developer cover is also provided, which is arranged between the developer frame and the end cover. When viewed along the length direction of the processing box, a part of the developer cover overlaps with a part of the developer coupling, and another part of the developer cover overlaps with a part of the end cover.

6. The process cartridge according to claim 1, wherein: A developing bearing and a developing protective cover are also provided; the developing bearing is arranged at one end of the developing frame, and the developing coupling is rotatably mounted on the developing bearing; the developing protective cover is arranged on the outer side of the developing bearing, and the developing protective cover does not support the developing coupling.

7. The process cartridge according to claim 1, wherein: A developing bearing and a developing cover are also provided; the developing bearing is arranged at one end of the developing frame, and the developing coupling is rotatably mounted on the developing bearing; observed along the length direction of the processing box, a part of the developing cover overlaps with a part of the developing coupling, and another part of the developing cover overlaps with a part of the end cover.

8. The process cartridge according to claim 1, wherein: A connecting portion for connecting the developing unit and the drum unit is also provided, and the connecting portion is arranged on the end cover; when observed along the length direction of the processing box, the connecting portion does not overlap with the developing coupling.

9. The process cartridge according to claim 1, wherein: A connecting portion is also provided for connecting the developing unit and the drum unit, the connecting portion comprising a through hole and a supporting column embedded in the through hole, the through hole is arranged on the end cover, and the supporting column is arranged on the developing unit; when observed along the length direction of the processing box, the connecting portion does not overlap with the developing coupling.

10. The process cartridge according to claim 8 or 9, characterized in that: The connecting portion is used to connect the developing unit and the drum unit in a swingable manner.

11. The process cartridge according to claim 1, wherein: The notch portion extends upward to the upper end of the end cover.

12. The process cartridge according to claim 11, wherein: The notch portion also extends backward to the rear end of the end cover.

13. The process cartridge according to claim 1, wherein: A separation member is also provided, the separation member being disposed at one end of the developing unit and configured to receive a force for moving the developing unit from the first position to the second position.

14. The process cartridge according to claim 13, wherein: The separation member is disposed below the developing frame or below the end cover.

15. The process cartridge according to claim 13, wherein: A developing cover is also provided on one side of the developing frame, and the separating member is arranged at the lower end of the developing cover.

16. The process cartridge according to claim 14 or 15, characterized in that: A portion of the separation member is exposed from below the developing frame.

17. A process cartridge, characterized in that include: a drum unit having a photosensitive drum and a photosensitive frame; A developing unit having a developing roller and a developing frame, wherein the developing unit is movable relative to the drum unit between a first position where the developing roller contacts the photosensitive drum and a second position where the developing roller and the photosensitive drum are separated; A developing coupling, for receiving a rotational driving force and transmitting it to the developing roller; An end cover is arranged on the outer side of one end of the developing frame, the end cover has a through hole and a notch portion, and the notch portion extends upward to the upper end of the end cover; The developing coupling has a gear portion, and a portion of the gear portion is exposed through the notch portion.

18. A process cartridge, characterized in that include: a drum unit having a photosensitive drum and a photosensitive frame; A developing unit having a developing roller and a developing frame, wherein the developing unit is movable relative to the drum unit between a first position where the developing roller contacts the photosensitive drum and a second position where the developing roller and the photosensitive drum are separated; A developing coupling, for receiving a rotational driving force and transmitting it to the developing roller; An end cover is arranged on the outer side of one end of the developing frame, the end cover has a through hole and a notch portion, and the notch portion extends backward to the rear end of the end cover; The developing coupling has a gear portion, and a portion of the gear portion is exposed through the notch portion.

19. A process cartridge, characterized in that include: a drum unit having a photosensitive drum and a photosensitive frame; A developing unit having a developing roller and a developing frame, wherein the developing unit is movable relative to the drum unit between a first position where the developing roller contacts the photosensitive drum and a second position where the developing roller and the photosensitive drum are separated; A developing coupling, for receiving a rotational driving force and transmitting it to the developing roller; An end cover is arranged on the outer side of one end of the developing frame, and the end cover has a through hole and a notch; A developing protective cover, disposed between the developing frame and the end cover, wherein the developing protective cover does not support the developing coupling; The developing coupling has a gear portion, and a portion of the gear portion is exposed through the notch portion.

20. A process cartridge, characterized in that include: a drum unit having a photosensitive drum and a photosensitive frame; A developing unit having a developing roller and a developing frame, wherein the developing unit is movable relative to the drum unit between a first position where the developing roller contacts the photosensitive drum and a second position where the developing roller and the photosensitive drum are separated; A developing coupling, for receiving a rotational driving force and transmitting it to the developing roller; An end cover is arranged on the outer side of one end of the developing frame, and the end cover has a through hole and a notch; A developer protective cover is arranged between the developer frame and the end cover, and when viewed along the length direction of the process cartridge, a portion of the developer protective cover overlaps a portion of the developer coupling; The developing coupling has a gear portion, and a portion of the gear portion is exposed through the notch portion.

Images