Developing box

Abstract

The utility model discloses a developing box which is detachably arranged on a drum assembly comprising a photosensitive drum, the developing box comprises a box body used for storing a developing agent, the box body is provided with a first end and a second end which are oppositely arranged in a first direction, the box body is provided with a third end and a fourth end which are oppositely arranged in a second direction, and the first direction and the second direction are crossed; a developing roller rotatable about an axis extending in the first direction, contacting the photosensitive drum to transfer the developer, and located at the third end; the driving part receives external power to rotate and is located at the first end, the separating part receives separating force to drive the box body to move, so that the developing roller is separated from the photosensitive drum, the separating part is located at the first end or the second end, and the first abutting part is in contact with an external part in the process that the developing roller is separated from the photosensitive drum. The developing box disclosed by the utility model is simple in structure, stable in movement and lower in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of image forming devices, in particular to a developing box. Background Art

[0002] The developing box is a detachable part widely used in image forming devices, and the developing box includes a developing roller. The image forming device is generally equipped with four developing boxes to correspond to the four photosensitive drums on the image forming device. Each developing box contains developers of different colors. The developing roller contacts the photosensitive drum and transfers the developer to the photosensitive drum, so that the image forming device can use developers of various colors to form better images and meet more printing needs of users. In order to avoid the damage of the developing roller or the photosensitive drum due to long-term contact between the developing roller and the photosensitive drum, the developing roller will be separated from the photosensitive drum when the developing box does not need to work. Therefore, a separating piece will be provided on the developing box, and the separating piece is used to receive the separation force provided by the image forming device, so that the developing roller is out of contact with the photosensitive drum, and the image quality of the image forming device is ensured. In the current prior art, separation force receiving pieces need to be provided at both ends of the developing box to separate the two ends of the developing roller from the photosensitive drum at the same time, but this results in a complex structure of the developing box, more parts, and high cost. Utility Model Content

[0003] According to one aspect of the utility model, there is provided a developing box, which is detachably mounted on a drum assembly including a photosensitive drum, and the developing box includes:

[0004] A box body, used for storing developer, the box body having a first end and a second end oppositely disposed in a first direction, and a third end and a fourth end oppositely disposed in a second direction, wherein the first direction and the second direction intersect;

[0005] a developing roller rotatable about an axis extending in a first direction, contacting the photosensitive drum to transfer developer, and located at the third end;

[0006] The driving part receives external power to rotate and is located at the first end.

[0007] a separation member, receiving the separation force and driving the box body to move, so that the developing roller is out of contact with the photosensitive drum, and the separation member is located at the first end or the second end,

[0008] A first abutment member is configured to contact an external component when the developing roller and the photosensitive drum are out of contact.

[0009] In some embodiments, the separating member is located at the second end, the first abutting member is located at the first end, the separating member receives the separating force to cause the second end to move away from the photosensitive drum, and the first abutting member causes the first end to move away from the photosensitive drum.

[0010] In some embodiments, a second abutment is provided at the second end, the second abutment is diagonally arranged with respect to the first abutment, and in the second direction, a distance between the second abutment and the developing roller is smaller than a distance between the first abutment and the developing roller.

[0011] In some embodiments, the box body uses the first abutment member and the second abutment member as fulcrums and moves away from the photosensitive drum through a swinging motion.

[0012] In some embodiments, the first end is provided with a bracket, the bracket is used to support the electrical contact surface of the storage medium, the storage medium stores the information of the developing box, and the bracket is a first abutment member.

[0013] The second end is provided with a second guided portion, the second guided portion guides the developing box to be installed on the drum assembly, and the second guided portion is the second abutting member.

[0014] In some embodiments, the separating member slides relative to the box body after receiving the separating force, and its sliding direction intersects with the first direction. The separating member includes a force-bearing portion and a force-applying portion. The force-bearing portion receives the separating force to make the separating member move relative to the box body, and the force-applying portion is an inclined surface whose extension direction intersects with the first direction and the second direction.

[0015] In some embodiments, the first abutment member extends in the first direction, and in the second direction, the first abutment member is located between a rotation axis of the driving portion and a rotation axis of the developing roller.

[0016] In some embodiments, in the first direction, a contact position of the first abutment member with the external component is located outside a contact position of the developing roller with the photosensitive drum.

[0017] In some embodiments, after the developing roller is out of contact with the photosensitive drum, the gap between the developing roller and the photosensitive drum gradually decreases in the first direction from the second end to the first end.

[0018] In some embodiments, the separation member includes a force applying portion in contact with the external component, and the force applying portion is stepped.

[0019] In some embodiments, the separator is located at the second end, the separator cannot move relative to the box body, the separator protrudes in a first direction, and the separator includes a separation force receiving surface that is an arc surface, and the separation force receiving surface receives the separation force.

[0020] In some embodiments, the first abutment member is located at the second end and extends in the first direction, the first abutment member contacts the external component, and the separation member drives the box body to swing with the first abutment member as the swing center after receiving the separation force.

[0021] In some embodiments, the separating member is located at the first end, the separating member protrudes in a first direction, the separating member receives the separating force and causes the first end to move in a direction away from the photosensitive drum, and the first abutting member is located at the second end, and the first abutting member and the second end move in a direction away from the photosensitive drum.

[0022] In some embodiments, the separation member drives the box body to swing with the first abutment member as a fulcrum.

[0023] In some embodiments, a contact position between the first abutment member and the drum assembly in the first direction is outside a contact position between the developing roller and the photosensitive drum.

[0024] In some embodiments, after the developing roller is out of contact with the photosensitive drum, the gap between the developing roller and the photosensitive drum gradually decreases in the first direction from the first end to the second end.

[0025] In some embodiments, the second end is provided with a second guided portion, and when the developing box is mounted to the drum assembly, the second guided portion plays a guiding role, and the first abutment member radially protrudes relative to the second guided portion.

[0026] In some embodiments, the first abutment member is an arc-shaped recessed portion, and when viewed along the first direction, the first abutment member at least partially overlaps with the developing roller.

[0027] In some embodiments, a second abutment member is further included at the second end, and the first abutment member and the second abutment member extend in the first direction.

[0028] In some embodiments, in a third direction intersecting the first direction, the second abutment is located above the first abutment, the second abutment abuts against another external component, the other external component is different from the external component, and the second abutment keeps the first abutment and the external component in abutment.

[0029] In some embodiments, the separation member includes a separation slope intersecting the first direction and the second direction, and the separation slope decomposes the separation force to cause the box body to swing.

[0030] In some embodiments, the first abutment member is a flexible member, the flexible member extends in a first direction, the flexible member is driven to move by the separation member, and the flexible member enables the box body to move away from the photosensitive drum.

[0031] In some embodiments, a stirring frame is further included, wherein the stirring frame stirs the developer in the box body, and the stirring frame is coaxially rotatable with the driving part.

[0032] In some embodiments, there is no stirring frame in the box body. When the developing box is installed in the image forming device, the second direction is the gravity direction. The developer in the box body flows toward the developing roller under the action of gravity, so that the developing roller absorbs the developer.

[0033] In some embodiments, a forced pushing assembly is further included, the forced pushing assembly is in contact with the drum assembly so that the developing roller is in close contact with the photosensitive drum, and the forced pushing assembly includes a first forced pushing portion and a second forced pushing portion.

[0034] In the second direction, a distance between the first urging portion and the developing roller is smaller than a distance between the second urging portion and the developing roller.

[0035] In some embodiments, when viewed along a third direction intersecting the first direction and the second direction, a projection of the driving portion overlaps with a projection of the first pushing portion.

[0036] The beneficial effects of the utility model are as follows: the developing box of the utility model is only provided with a separation piece at the first end or the second end, and the developing roller and the photosensitive drum can be separated by only receiving the separation force of the separation force output piece or the drum assembly. The developing box has a simple structure, stable movement and lower cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a schematic diagram of the structure of the developing box installed on the drum assembly in the first embodiment;

[0038] Figure 2 is a schematic structural diagram of the drum assembly in the first embodiment;

[0039] Figure 3 is a structural schematic diagram of the drum assembly in Embodiment 1 from another perspective;

[0040] Figure 4 is a schematic structural diagram of a developing cartridge in Embodiment 1;

[0041] Figure 5is an exploded view of the first end of the developing cartridge in the first embodiment;

[0042] Figure 6 is a side view of a first end of the developing cartridge in the first embodiment;

[0043] Figure 7 is a side view of the second end of the developing cartridge in the first embodiment;

[0044] Figure 8 is an exploded view of the second end of the developing cartridge in the first embodiment;

[0045] Fig. 9 is a cross-sectional view of the developing cartridge in the first embodiment when it is mounted to the drum assembly without receiving a separation force;

[0046] Fig.10 is a cross-sectional view of the developing cartridge in the first embodiment being mounted to the drum assembly to receive the separation force;

[0047] Fig.11 is a schematic diagram of the second guided portion and the bracket in a diagonal shape in the first embodiment;

[0048] Fig.12 is a partial cross-sectional view of the separation member when the developing cartridge is installed to the drum assembly in the first embodiment;

[0049] Fig.13 is a schematic structural diagram of another separation member in the first embodiment;

[0050] Fig.14 is a schematic structural diagram of a developing cartridge in Embodiment 2;

[0051] Fig.15 is a schematic structural diagram of the second end of the developing cartridge in the second embodiment;

[0052] Fig.16 is an exploded view of the second end in the second embodiment;

[0053] Fig.17 is a cross-sectional view of the second end in the second embodiment;

[0054] Fig.18 is a schematic diagram of the structure in which the developing cartridge is installed to the drum assembly without receiving a separation force in the second embodiment;

[0055] Fig.19 is a cross-sectional view of the developing cartridge in the second embodiment when it is mounted to the drum assembly without receiving a separation force;

[0056] Fig. 20 is a schematic diagram of the structure in which the developing cartridge is installed to the drum assembly to receive the separation force in the second embodiment;

[0057] Fig.21 is a cross-sectional view of the separate developing cartridge in the second embodiment being mounted to the drum assembly to receive the separation force;

[0058] Fig. 22 is a schematic diagram of the structure of the second end in Embodiment 3;

[0059] Fig.23 is a cross-sectional view of the developing cartridge in the third embodiment when it is mounted to the drum assembly without receiving a separation force;

[0060] Fig.24 is a cross-sectional view of the developing cartridge in Embodiment 3 mounted to the drum assembly to receive the separation force;

[0061] Fig.25 is a schematic diagram of the three-dimensional structure of the developing box in the fourth embodiment;

[0062] Fig.26 is a side view of the developing box when the developing roller is in contact with the photosensitive drum in the fourth embodiment;

[0063] Fig. 27 is a structural schematic diagram of another embodiment of the developing cartridge in the fourth embodiment;

[0064] Fig.28 is a side view of another embodiment of the developing roller in the fourth embodiment in contact with the photosensitive drum;

[0065] Fig.29 is a schematic structural diagram of the second end of the box body in Embodiment 5;

[0066] Fig.30 is a side view of the developing box in the fifth embodiment in which the developing roller and the photosensitive drum are in contact;

[0067] Fig.31 is a side view of the developing box in the fifth embodiment in which the developing roller and the photosensitive drum are in a separated state;

[0068] Fig.32 is a schematic structural diagram of the drum assembly in Embodiment 6;

[0069] Fig.33 is a schematic diagram of the structure in which the developing box is away from the photosensitive drum in the sixth embodiment;

[0070] Fig.34 is a schematic structural diagram of the second end of the developing cartridge in Embodiment 6;

[0071] Fig.35 is a cross-sectional view of the developing cartridge installed to the drum assembly in Embodiment 6;

[0072] Fig.36 is a schematic diagram of the structure of the separation member in the sixth embodiment when the separation force is not received;

[0073] Fig.37 is a schematic diagram of the structure of the separation member receiving the separation force in the sixth embodiment;

[0074] Fig.38is a schematic structural diagram of a developing cartridge according to another embodiment of the sixth embodiment;

[0075] Fig.39 is a schematic structural diagram of the second end of the developing cartridge in Embodiment 7;

[0076] Fig.40 is a schematic structural diagram of the second end of the developing box and the second side wall of the drum assembly in the seventh embodiment;

[0077] Fig.41 is a side view of the second end of the box body in the eighth embodiment;

[0078] Fig.42 is a side view of the developing cartridge in Embodiment 8 when assembled to the drum assembly;

[0079] Fig.43 is a side view of another developing cartridge implemented in the eighth embodiment;

[0080] Fig.44 is a schematic structural diagram of a developing cartridge in Embodiment 9;

[0081] Fig.45 is a schematic structural diagram of a state in which a developing cartridge is assembled to a drum assembly in Embodiment 9;

[0082] Fig.46 is a schematic structural diagram of the ninth embodiment when the separation member does not receive the separation force;

[0083] Fig.47 is a schematic diagram of the structure of the separation member after receiving the separation force in the ninth embodiment;

[0084] Fig.48 is a schematic structural diagram of a developing cartridge in Embodiment 10;

[0085] Fig.49 is a schematic diagram of the exploded structure of the first forced pushing portion in the tenth embodiment;

[0086] Fig.50 is an exploded view of the developing cartridge in the eleventh embodiment;

[0087] Fig.51 is a cross-sectional view of the developing cartridge in the eleventh embodiment;

[0088] Fig.52 It is a schematic diagram of the structure of the driving unit in the eleventh embodiment. DETAILED DESCRIPTION

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] In the following descriptions of directions, perpendicular to Figure 1 When viewed from the center of the paper, Figure 1 The left side of the paper is left. Figure 1 The right side of the paper is right. Figure 1 The upper side of the paper is the top. Figure 1 The lower side of the middle paper is the bottom. Figure 1 The near side of the middle paper is the front, Figure 1 The far side of the middle paper is the back. The left-right direction is an embodiment of the first direction, the front-back direction is an embodiment of the second direction, and the up-down direction is an embodiment of the third direction. The first direction, the second direction and the third direction intersect each other, and are preferably perpendicular.

[0095] Embodiment 1:

[0096] like Figure 1-Figure 11 As shown, this embodiment provides a developing box 1, which is detachably mounted on a drum assembly 2 of an image forming device. The image forming device is provided with a separation force output member 91 and an identification groove 92, and an electric contact pin is provided in the identification groove 92.

[0097] The drum assembly 2 is used to carry the developing box 1. The drum assembly 2 includes a first side wall 21, a second side wall 22 and a photosensitive drum 23. The photosensitive drum 23 is rotatably supported by the first side wall 21 and the second side wall 22. The photosensitive drum 23 receives the developer provided by the developing box 1 to form an electrostatic latent image. A first guide opening 211 is provided at the first side wall 21, and a second guide opening 221 is provided at the second side wall 22. Both the first guide opening 211 and the second guide opening 221 are arc-shaped openings for guiding the developer cartridge 1 to be smoothly installed on the drum assembly 2. Specifically, the first guide opening 211 and the second guide opening 221 have the same structure. The second guide opening 221 is used as an example to illustrate the specific structure. The second guide opening 221 includes a first guide surface 221a, a second guide surface 221b, and an abutted surface 221c. The abutted surface 221c connects the front end of the first guide surface 221a and the front end of the second guide surface 221b to form a U-shaped groove structure. The first guide surface 221a and the second guide surface 221b extend approximately along the front-to-back direction. The first guide surface 221a is located on the upper side of the second guide surface 221b. The first guide surface 221a and the second guide surface 221b are spaced apart from each other in the up-down direction. The abutted surface 221c is an arc surface. The second guide opening 221 further includes a first abutted portion 2211, which is disposed at the end of the first guide surface 221a away from the abutted surface 221c. The drum assembly 2 further includes a force-applying assembly, which is used to apply a pushing force to the developing box 1 so that the photosensitive drum 23 receives the developer more stably. The force-applying assembly includes a first force-applying member 212 disposed near the first side wall 21 and a second force-applying member 222 disposed near the second side wall 22. The first force-applying member 212 and the second force-applying member 222 are both connected to the elastic member and can move relative to the photosensitive drum 23.

[0098] like Figure 4-Figure 8 As shown in the figure, the developing box 1 includes a box body 10, a developing component, a transmission component, a separating component and an identifying component.

[0099] The box body 10 is used to contain the developer. The box body 10 has a first end 11 and a second end 12 arranged oppositely in the first direction. The box body 10 has a third end 13 and a fourth end 14 arranged oppositely in the second direction. The box body 10 has a fifth end 15 and a sixth end 16 arranged oppositely in the third direction. The box body 10 is provided with a friction portion 151. The friction portion 151 is provided with a plurality of ribs extending in the first direction. The friction portion 151 is used to facilitate the user to pick up the developer box 1. The transmission assembly is located at the first end 11 of the box body 10, and is used to receive the power output by the image forming device so that the developing assembly in the developing box 1 is driven. The first protective cover 111 is detachably fixedly mounted on the first end 11 of the box body 10 by means of screws 48. The first protective cover 111 at least covers part of the transmission assembly. The first protective cover 111 is used to protect the transmission assembly.

[0100] like Figure 4 and Figure 5 As shown, the identification component is located at the first end 11 of the box body 10. In this embodiment, the identification component is specifically a storage medium 113. The storage medium 113 is used to store information of the developing box 1. When the developing box 1 is installed in the image forming device, the information is transmitted to the image forming device, so that the developing box 1 is recognized by the image forming device. The storage medium 113 includes an electrical contact surface formed integrally or separately connected thereto, and the electrical contact surface contacts the electrical contact pin in the identification slot 92, so that the information in the storage medium 113 is transmitted to the image forming device.

[0101] A bracket 114 is fixedly provided at the first end 11. The bracket 114 is firstly snapped onto the first protective cover 111 by means of a buckle, and then further fixed onto the first protective cover 111 by means of a screw 48, so that the bracket 114 is indirectly fixedly mounted on the box body 10. In some embodiments, the bracket 114 may be directly fixed onto the box body 10. The storage medium 113 is mounted on the bracket 114, and neither the bracket 114 nor the storage medium 113 can move relative to the box body 10. When the developing box 1 is mounted to the drum assembly 2, and the two are mounted together in the image forming device, the bracket 114 contacts external components such as the identification slot 92 as a first abutment member or a limited member. In some embodiments, the storage medium 113 can move relative to the box body 10.

[0102] like Figure 4 and Figure 5 As shown, the developing assembly includes a developing roller 131, a powder feeding roller 132 and a stirring frame (not shown), and the developing roller 131, the stirring frame and the powder feeding roller 132 are all rotatably supported by the box body 10. The rotation axes of the developing roller 131, the stirring frame and the powder feeding roller 132 all extend along the first direction. The powder feeding roller 132 is arranged adjacent to the developing roller 131, and in the second direction, the developing roller 131 is closer to the third end 13 of the box body 1 than the powder feeding roller 132. The powder feeding roller 132 transfers the developer to the developing roller 131. In some embodiments, the powder feeding roller 132 may not rotate, and may transfer the developer to the developing roller 131 by friction. The stirring frame is used to stir the developer in the developing chamber, so that the developer generates friction to prevent the developer from agglomerating. The developing roller 131 is used to contact with the photosensitive drum 23 to transfer the developer to the photosensitive drum 23.

[0103] The developing box 1 further includes a powder knife 133 , which is disposed adjacent to the developing roller 131 and extends in a first direction. The powder knife 133 is used to contact the developing roller 131 to control the thickness of the developer layer on the developing roller 131 .

[0104] like Figure 5 and Figure 6As shown, the transmission assembly is arranged at the first end 11 of the box body 10, and the transmission assembly includes a driving part 40, and the driving part 40 includes a power receiving part 401 and a driving gear 402, which can be integrally formed or combined. In the first direction, the driving gear 402 is closer to the first end 11 than the power receiving part 401, and the power receiving part 401 is used to receive external power, which in this embodiment is the power output by the image forming device, and drives the driving gear 402 to rotate.

[0105] The transmission assembly also includes a developing gear 41, a powder feeding gear 42, a first idler gear 43, a second idler gear 44, a third idler gear 45 and a stirring gear 46. The powder feeding gear 42 is meshed with the driving gear 402 to receive power and rotate. The first idler gear 43 is meshed with the driving gear 402 and the second idler gear 44 at the same time to receive power and transmit the power to the second idler gear 44. The second idler gear 44 is meshed with the developing gear 41 to transmit power. The third idler gear 45 is meshed with the driving gear 402 and the stirring gear 46 at the same time to transmit power to the stirring gear 46. In this embodiment, the third idler gear 45 is preferably a two-stage gear to reduce the rotation speed of the stirring gear 46. In other embodiments, the stirring gear 46 can be directly meshed with the driving gear 402. The developing gear 41 is fixedly mounted on one end of the developing roller 131 located at the first end 11 through a D-shaped opening and drives the developing roller 131 to rotate, the powder feeding gear 42 is fixedly mounted on one end of the powder feeding roller 132 located at the first end 11 through a D-shaped opening and drives the powder feeding roller 132 to rotate, and the stirring gear 45 is mounted on one end of the stirring frame located at the first end 11 and drives the stirring frame to rotate. This embodiment does not limit the number of gears and the meshing relationship of the transmission assembly, and can be set according to actual needs.

[0106] A first bearing 47 is also provided at the first end 11, and the first bearing 47 is used to support the developing roller 131 and the powder feeding roller 132 located at one end of the first end 11. Preferably, a plurality of support columns are provided on the first bearing 47, and the plurality of support columns can rotatably support the first idler wheel 43, the second idler wheel 44, the third idler wheel 45 and the driving unit 40 respectively.

[0107] The developer cartridge 1 further includes a guided component, which enables the developer cartridge 1 to be smoothly installed on the drum assembly 2. The guided component includes a first guided portion 122 and a second guided portion 313 in an arc shape. The first guided portion 122 is located at the first end 11, and the second guided portion 313 is located at the second end 12. The projections of the first guided portion 122 and the second guided portion 313 overlap with the projection of the axis of the developing roller 131 in the first direction. In this embodiment, the first guided portion 122 is preferably detachably mounted on the first protective cover 111, or may be formed integrally with the first protective cover 111. The first guided portion 122 and the second guided portion 313 are respectively guided by the first guide opening 211 and the second guide opening 221 to facilitate the installation of the developer cartridge 1.

[0108] The second guided portion 313 is provided with a first abutting surface for abutting against the second guide opening 221 when the developer cartridge is mounted on the drum assembly 2, and the first abutting surface is the circumferential surface of the second guided portion 313. The first abutting surface is used to abut against the abutted surface 221c of the second guide opening 221, that is, in this embodiment, the second guided portion 313 can be regarded as a second abutting member contacting with an external component.

[0109] The developer box 1 also includes a forced pushing assembly. When the developer box 1 is installed on the drum assembly 2, the forced pushing assembly is abutted by the force applying assembly so that the developer box 1 receives the forced pushing force applied by the drum assembly 2, so that the developing roller 131 is in close contact with the photosensitive drum 23. The forced pushing assembly includes a first forced pushing portion 1221 located at the first end 11 and a second forced pushing portion 312 located at the second end 12. The first forced pushing portion 1221 is abutted by the first force applying member 212 to receive the forced pushing force. In this embodiment, the first forced pushing portion 1221 is formed integrally with the first guided portion 122 to simplify the structure of the developer box 1 and reduce the number of parts. In other embodiments, it can be a separate combination. In the second direction, the first forced pushing portion 1221 is closer to the storage medium 113 than the first guided portion 122.

[0110] like Figure 7 and Figure 8 As shown, a support member 31 is provided at the second end 12, and the support member 31 is fixedly mounted on the box body 10 by means of screws or the like, and the support member 31 includes a support portion 311, a second forced pushing portion 312, and a second guide portion 313. The second forced pushing portion 312 is symmetrically arranged with the first forced pushing portion 1221, and the second forced pushing portion 312 is abutted by the second force applying member 222 to receive the forced pushing force. The second guided portion 313 is a cylindrical protrusion extending along the first direction, and the second guided portion 313 is guided by the second guide port 221 to facilitate the installation of the developing box 1. The interior of the support portion 311 is hollow, and a guide rail is provided inside, and the guide rail extends in the direction (front and rear direction) close to the developing roller 131, and openings 3111 are provided at both ends of the extension. The developing roller 131 and the powder feeding roller 132 are rotatably supported by the support member 31 at one end of the second end 12, that is, the support member 31 can be regarded as a second bearing supporting the developing roller 131 and the powder feeding roller 132. In this embodiment, the support member 31 is made of a conductive material, and the second forced pushing portion 312 contacts the electrode in the drum assembly 2 so that the second forced pushing portion 312 receives the voltage output by the image forming device through the drum assembly 2, that is, the second forced pushing portion 312 can be regarded as the electric receiving portion in this embodiment, which receives the external voltage and transmits the voltage to the developing roller 131 and the powder feeding roller 132, so that the developing roller 131 and the powder feeding roller 132 are charged to absorb the developer. In other embodiments, in order to save the production cost of the developing box 1, the support portion 311 and the electric receiving portion can be separately provided, and then the voltage is transmitted to the developing roller 131 and the powder feeding roller 132 through a conductive member such as an iron sheet.

[0111] like Fig.11 As shown, in this embodiment, the second guided portion 313 and the bracket 114 are preferably diagonal, and the second guided portion 313 and the bracket 114 do not overlap in the first direction, that is, the diagonal condition is satisfied. In this embodiment, the bracket 114 is located at the first end 11 and close to the fourth end 14, and the second guided portion 313 is located at the second end 12 and close to the third end 13. In the second direction, the distance between the second guided portion 313 and the developing roller 131 is smaller than the distance between the bracket 114 and the developing roller 131. Further, the bracket 114 is located at the junction of the first end 11 and the fourth end 14, and the second guided portion 313 is located at the junction of the second end 12 and the third end 13.

[0112] like Figure 7 and Figure 8 As shown, the separating member 32 is disposed at the second end 12 and is movably supported by the supporting member 31 . The separating member 32 receives the separating force applied by the image forming device, so that the developing box 1 moves, thereby separating the developing roller 131 and the photosensitive drum 23 .

[0113] The separator 32 includes a force-bearing portion 321, a supported portion 322 and a force-applying portion 323. The force-bearing portion 321 and the force-applying portion 323 are respectively located at two ends of the separator 32. The force-bearing portion 321 is farther away from the developing roller 131 than the force-applying portion 323. The force-bearing portion 321 is block-shaped, and can be plate-shaped or sheet-shaped. The force-bearing portion 321 is abutted by the separation force output member 91 to receive the separation force, thereby causing the separator 32 to slide relative to the box body 10, further move in a direction away from the fourth end 14, and cause the box body 10 to move in a direction away from the photosensitive drum 23. The supported portion 322 is a strip-shaped portion that cooperates with the guide rail in the supporting portion 311. When the separator 32 moves, the separator 32 can be guided by the guide rail and slide along a predetermined trajectory. The force-applying portion 323 is preferably a slope, and further preferably a smooth slope, whose extension direction intersects with the first direction. The slope includes an arc surface or other planes. After the separator 32 moves under force, the force-applying portion 323 abuts against the drum assembly 2, causing the developing box 1 to move relative to the drum assembly 2.

[0114] like Figure 7 As shown, a powder filling port 123 is further provided at the second end 12, through which the developer is poured into the box body 10, and a sealing cover is provided at the powder filling port 123, which is used to seal the powder filling port 123 to prevent the developer from leaking.

[0115] like Fig. 9 and Fig.10As shown, the developing box 1 is installed to the drum assembly 2, and the two are installed together in the image forming device. When the separation force output member 91 does not output the separation force, the pushing assembly receives the pushing force applied by the force applying assembly, so that the developing roller 131 maintains contact with the photosensitive drum 23, and the separating member 32 does not move relative to the box body 10. When the separation force output member 91 starts to output the separation force, the separation force output member 91 abuts against the force-bearing portion 321 of the separation member 32, so that the separation member 32 moves relative to the box body 10, and the force-applying portion 323 abuts against the first abutted portion 2211 on the drum assembly 2, and the first abutted portion 2211 exerts a reaction force on the force-applying portion 323. Since the force-applying portion 323 is an inclined surface, when the force-applying portion 323 receives the reaction force and transmits the reaction force to the box body 10, the box body 10 is driven to move in the direction away from the photosensitive drum 23, that is, the separation member 32 drives the box body 10 to move in the direction away from the photosensitive drum 23 during the process of being abutted by the separation force output member 91. Further, the second end 12 of the box body 10 overcomes the thrust force applied by the second force-applying member 222 and moves in the direction away from the photosensitive drum 23. Further, the second end 12 preferably moves in the direction away from the photosensitive drum 23 in a swinging manner, or it can be partially swung and partially translated, and a portion of the developing roller 131 is separated from the photosensitive drum 23.

[0116] like Fig.10 and Fig.11 As shown, when the force-applying portion 323 abuts against the first abutted portion 2211 to cause the second end 12 to move, the second guided portion 313 abuts against the second guide port 221. Since the second guided portion 313 and the bracket 114 are diagonally arranged and the bracket 114 is limited by the identification groove 92, the second guided portion 313 abuts against the second guide port 221, and the separating member continues to move in contact with the separating force and transmits the separating force to the box body 10. The first end 11 moves with the second end 12, and the first end 11 overcomes the thrust force applied by the first force-applying member 212 and moves in a direction away from the photosensitive drum 23. Furthermore, the first end 11 preferably moves in a swinging manner in a direction away from the photosensitive drum 23, or it may be partially swung and partially translated, and another part of the developing roller 131 is separated from the photosensitive drum 23.

[0117] like Fig.11 As shown, it can be known that the first distance generated by the movement of the second end 12 is greater than the second distance generated by the movement of the first end 11, that is, in the first direction from left to right, the gap between the developing roller 131 and the photosensitive drum 23 gradually decreases, that is, the gap between the end of the developing roller 131 located at the second end 12 and the photosensitive drum 23 is greater than the gap between the other end located at the first end 11 and the photosensitive drum 23.

[0118] It is known that the bracket 114 may not serve as the first abutment member, and a first abutment member may be separately provided at the first end 11, and the first abutment member may be limited or abutted by external components such as the identification groove 92 or other components in the image forming device, and the first abutment member may be diagonally opposed to the second guided portion 131, or a component abutting against the drum assembly 2 may be separately provided at the second end 12, or the second guided portion 313 may have no guiding function, that is, the first end 11 and the second end 12 may be both provided with the first abutment member and the second abutment member that act on the drum assembly 2 or the components inside the image forming device. Preferably, the first abutment member and the second abutment member located at the first end 11 and the second end 12, respectively, may be diagonally opposed, or may be incompletely diagonally opposed.

[0119] After the separation force output member 91 stops outputting the separation force to the developing box 1, the separation force output member 91 releases the contact with the separation member 32, and the developing box 1 moves toward the direction close to the photosensitive drum 23 under the action of the force-applying component. The separation member 32 abuts against the first abutted portion 2211 and moves in the reverse direction, and the developing roller 131 contacts the photosensitive drum 23 again.

[0120] Furthermore, in order to ensure that the separation member 32 can stably move in the reverse direction to reset, a reset elastic member 33 can be provided. The reset elastic member 33 accumulates elastic force when the separation member 32 moves under the separation force. When the separation member 32 loses the separation force, the elastic member is released to reset the separation member 32 in the reverse direction. Specifically, Fig.12 As shown, the reset elastic member 33 is arranged between the separator 32 and the support portion 311. The reset elastic member 33 can be a compression spring and is arranged in the support portion 311. One end of the reset elastic member 33 abuts against the separator 32, and the other end abuts against one end of the support portion 311 close to the developing roller 131. The reset elastic member 33 is used to apply a force to the separator 32 to move in a direction away from the developing roller 131, so that the separator 32 moves in the reverse direction when not receiving the separation force to reset and receive the separation force next time. It can be known that the limited member can be set at the first end 11, and the separator 32 is only set at the second end 12. The separator 32 makes the second end 12 of the box body 10 move in a direction away from the photosensitive drum 23, and the developing roller 131 is partially disengaged from the photosensitive drum 23. That is, the disengagement in this embodiment can be complete disengagement or partial disengagement.

[0121] like Fig.13As shown, as a feasible embodiment, the separator 32 does not slide relative to the box body 10, and a connecting portion 324 is arranged between the separator 32 and the support member 31. The connecting portion 324, the separator 32 and the support member 31 can be formed as one piece or a separate combination. The connecting portion 324 is in the shape of a rib extending along the first direction. A plurality of connecting portions 324 are arranged, and the plurality of connecting portions 324 are arranged at intervals, and the intervals are hollow. The plurality of connecting portions 324 can ensure a stable connection between the separator 32 and the support member 31. The hollow interval arrangement can make the connecting portion 324 have a certain elastic deformation, and the connection 324 can be regarded as a cantilever.

[0122] When the separating member 32 receives the separating force applied by the image forming device, the separating member 32 transmits the separating force to the connecting portion 324, and the connecting portion 324 undergoes a certain elastic deformation, thereby causing the force-applying portion 323 of the separating member 32 to move to abut against the first abutted portion 2211, so that the developing cartridge 1 moves relative to the drum assembly 2. When the force-bearing portion 321 is no longer abutted by the separating force output member 91, the connecting portion 324 restores the separating member 32 to the position when it does not receive the separating force according to its own elastic force.

[0123] In this embodiment, the parts that the developing box 1 contacts with the drum assembly 2 or the image forming device are all external parts.

[0124] Embodiment 2:

[0125] Unless otherwise specified, the structure of the developing box in this embodiment is the same as that in the first embodiment. The difference compared with the first embodiment is that the structure of the separating part is different.

[0126] In this embodiment, the second side wall 22 of the drum assembly 2 has a second abutted portion 2212 , and the second abutted portion 2212 is farther away from the photosensitive drum 23 than the first abutted portion 2211 in the second direction.

[0127] A supporting portion 311b is provided on the support member 31, and the supporting portion 311b is hollow inside. The supporting portion 311b includes a guide member 311b1, and the guide member 311b1 extends approximately along the second direction. The supporting portion 311b also includes a cover portion 314, and the supporting portion 311b is provided with an insertion hole. The cover portion 314 is provided with a plurality of first connecting protrusions 3141 extending along the first direction so that the cover portion 314 can be detachably installed on the bottom of the supporting portion 311b, and the cover portion 314 is provided with a through hole 3142 penetrating the cover portion 314 along the third direction.

[0128] like Figure 15-17As shown, the separation member includes a force-bearing member 32a and a force-applying member 32b arranged at the second end 12, and both the force-bearing member 32a and the force-applying member 32b are movably supported by the support portion 311b. The force-bearing member 32a includes a first force-bearing portion 32a1, a first force-applying portion 32a2 and a guided portion 32a3. The first force-bearing portion 32a1 is located at the rear end of the force-bearing member 32a in the second direction, and the first force-bearing portion 32a1 is used to receive the separation force of the separation force output member 91 so that the force-bearing member 32a moves in the second direction relative to the box body 10. The first force-applying portion 32a2 is an inclined surface or an arc surface, and the present embodiment is preferably an inclined surface. The extension direction of the first force-applying portion 32a2 intersects with the second direction and the third direction, specifically extending backward along the second direction and extending downward along the third direction. The guided portion 32a3 cooperates with the guide member 311b1 so that the force-bearing member 32a is guided by the support portion 311b and moves according to a predetermined trajectory.

[0129] like Figure 15-17 As shown, the force-applying member 32b includes a second force-bearing portion 32b1 and a second force-applying portion 32b2. The second force-bearing portion 32b1 is abutted by the first force-applying portion 32a2 to make the force-bearing member 32a move along the third direction. The second force-applying portion 32b2 is an inclined surface or an arc surface. In this embodiment, it is preferably an inclined surface. The extension direction of the second force-applying portion 32b2 intersects with the second direction and the third direction, specifically extending backward along the second direction and extending downward along the third direction. The extension directions of the second force-applying portion 32b2 and the first force-applying portion 32a2 can be intersecting or parallel. In this embodiment, it is preferably intersecting. The second force-applying portion 32b2 abuts against the second abutted portion 2212 on the drum assembly. The second force-applying portion 32b2 is exposed to the outside through the through hole 3142 of the cover portion 314. In this embodiment, in order to facilitate the force-bearing member 32a and the force-applying member 32b, the support portion 311b and the cover portion 314 are formed by separate components. In other embodiments, the two can be formed as one body. In some embodiments, the force receiving member 32 a and the force applying member 32 b may be movably supported by the box body 10 .

[0130] like Figure 15-17 As shown, the support portion 311b also contains a reset elastic member for resetting the separation member. In this embodiment, the reset elastic member includes a first elastic member 33a and a second elastic member 33b. The first elastic member 33a and the second elastic member 33b are preferably compression springs, and may also be other elastic media such as sponges or tension springs. The first elastic member 33a can be compressed and stretched along the second direction. The first elastic member 33a is located between the force-bearing member 32a and the front end of the support portion 311b in the second direction. The second elastic member 33b can be compressed and stretched in the third direction. The second elastic member 33b is located between the force-applying member 32b and the cover portion 314 in the third direction. It is also possible to set only one elastic member or no elastic member.

[0131] like Fig.14As shown, the first abutment 1111 in contact with the external component is arranged at the first end 11 of the box body 10, and the first abutment 1111 is preferably arranged on the first protective cover 111, and may be arranged on the box body 10 in other embodiments, and the first abutment 1111 is located between the rotation axis of the developing roller 131 and the rotation axis of the driving part 40 in the second direction. The first abutment 1111 extends in the first direction, and the first abutment 1111 contacts another abutted portion on the drum assembly 2, and the other abutted portion is located on the second side wall 22. The contact position of the first abutment 1111 and the other abutted portion is located outside the position where the developing roller 131 contacts the photosensitive drum 23.

[0132] like Figure 18-Figure 21 As shown, the developing box 1 is installed to the drum assembly 2, and when the two are installed together in the image forming device, the developing roller 131 is in close contact with the photosensitive drum 23. When the image forming device issues an instruction to make the developing roller 131 and the photosensitive drum 23 disengage, the separation force output member 91 abuts against the first force-bearing portion 32a1 of the force-bearing member 32a to apply a separation force thereto, so that the force-bearing member 32a moves forward in the second direction relative to the box body 10, the first elastic member 33a is compressed, and the first force-applying portion 32a2 abuts against the second force-bearing portion 32b1 of the force-applying member 32b so that the force-applying member 32b moves downward in the third direction, and the second elastic member 33b is compressed. The second force-applying portion 32b2 of the force-applying member 32b interacts with the second abutted portion 2212, so that the force-bearing member 32a drives the second end 12 of the box body 10 to overcome the forced thrust to move in a direction away from the photosensitive drum 23. The force-applying member 32b and the box body 10 move relative to each other, and the end of the developing roller 31 located at the second end 12 gradually breaks away from contact with the photosensitive drum 23.

[0133] When the force applying member 32b drives the second end 12 to move in a direction away from the photosensitive drum 23, the first abutting portion 1111 interacts with another abutting portion, so that the first end 11 also moves in a direction away from the photosensitive drum 23 so that the end of the developing roller 31 located at the first end 11 gradually loses contact with the photosensitive drum 23, and then the developing roller 131 completely loses contact with the photosensitive drum 23. It can be seen that the distance moved by the second end 12 is not less than the distance moved by the first end 11. In this embodiment, it is preferred that the distance moved by the second end 12 is greater than the distance moved by the first end 11.

[0134] In some embodiments, the first abutting portion 1111 may not be provided, and only the second force applying portion 32 b 2 is provided to interact with the drum assembly so that the end of the developing roller 131 located at the second end 12 is out of contact with the photosensitive drum 23 .

[0135] When the developing roller 131 needs to contact the photosensitive drum 23 again, the separation force output member 91 releases the contact with the force-bearing member 32a, and the force-bearing member 32a and the force-applying member 32b move in opposite directions under the elastic action of the first elastic member 33a and the second elastic member 33b respectively, and the developing box 1 moves toward the direction close to the photosensitive drum 23 under the action of the thrust applied by the drum assembly 2, and the developing roller 131 contacts the photosensitive drum 23.

[0136] In other embodiments, the force-bearing member is a swinging member, which receives the separation force applied by the separation force output member 91 and can swing relative to the box body 10, and drive the box body 10 to move in a direction away from the photosensitive drum 23, so that the developing roller 131 and the photosensitive drum 23 are out of contact.

[0137] In addition, in this embodiment, the stirring frame 134 includes a rotating shaft and a stirring blade. The rotating shaft rotates following the stirring gear 46, and the rotating shaft drives the stirring blade to rotate, and the stirring blade stirs the developer.

[0138] Embodiment three:

[0139] Unless otherwise specified, the structure of the developing box in this embodiment is the same as that in Embodiment 1. The main difference between this embodiment and Embodiment 1 is that the separating member 32 in this embodiment cannot move relative to the box body 10.

[0140] like Figure 22-Figure 24 As shown, in this embodiment, the separator 32 is supported by the support member 31, and can be fixedly mounted on the support member 31, or formed integrally with the support member 31, or directly mounted on the box body 10, that is, the separator 32 does not move relative to the box body 10. The force applying portion 323 is stepped, and the force applying portion 323 includes a third force applying portion 3231 and a fourth force applying portion 3232. The third force applying portion 3231 is farther away from the force receiving portion 321 than the fourth force applying portion 3232, and the two are connected by an inclined surface or an arc surface.

[0141] The developing box 1 is mounted on the drum assembly 2, and the two are mounted together in the image forming device. When the developing box 1 does not receive the separation force, the third force applying portion 3231 contacts the first abutted portion 2211 but does not generate a squeezing movement, or does not contact, and the developing roller 131 contacts the photosensitive drum 23. When the separation force output member 91 abuts against the force receiving portion 321 and applies separation thereto, the separating member 32 transmits the separation force to the box body 10 and drives the box body 10 to move. As the separation force output member 91 continues to apply the separation force, the fourth force applying portion 3232 abuts against the first abutted portion 2211, the second end 12 moves in a direction away from the photosensitive drum 23, and a part of the developing roller 131 is out of contact with the photosensitive drum. When the second guided portion 313 abuts against the second guide port 221, the bracket 114 is subjected to force so that the first end 11 moves in a direction away from the photosensitive drum 23, and another part of the developing roller 131 is out of contact with the photosensitive drum 23.

[0142] Optionally, the force-applying portion 323 may be in an arc or inclined shape instead of a step shape, and the arc or inclined surface has a greater curvature or inclination.

[0143] Compared with the first embodiment, this embodiment can simplify the structure of the developing box, and facilitate the production of the developing box 1.

[0144] Embodiment 4:

[0145] Unless otherwise specified, the structure of the developing box in this embodiment is the same as that in Embodiment 3. The main difference between this embodiment and Embodiment 3 is that the separating member 32 in this embodiment cannot move relative to the box body 10.

[0146] like Figure 25 to Figure 26 As shown, a separator 32 is provided on the second end 12 of the box body 10, and the separator 32 is fixedly provided at the second end 12 of the box body 10. In this embodiment, the separator 32 is fixedly provided at the second end 12 of the box body 10 by an integral molding method. In other embodiments, the separator 32 can also be separated from the box body 10 and fixedly provided at the second end 12 of the box body 10 by means of screw buckles or the like. The separator 32 is a protrusion structure protruding leftward in the first direction. The separator 32 is provided near the fourth end 14 in the second direction.

[0147] The separation member 32 is provided with a separation force receiving surface 325, which is an arc-shaped concave surface, and the arc-shaped concave surface includes one or more common arc surfaces, or stepped inclined surfaces, etc. The second direction and the third direction both intersect the separation force receiving surface 325. The separation force receiving surface 325 is used to contact the separation force output member 91 in the image forming device and bear the separation force applied by the separation force output member 91.

[0148] A support column 315 is also integrally formed or detachably fixedly provided on the second end 12 of the box body 10. The support column 315 protrudes to the left from the second end 12 of the box body 10 in the first direction. The support column 315 is located between the rotation axis of the stirring frame and the rotation axis of the driving unit 40 in the second direction. The support column 315 is used to cooperate with the positioning portion on the drum assembly 2, and the positioning portion is preferably located in the positioning groove 25 of the second side wall 22. When the developing box 1 is installed on the drum assembly 2 and installed in the image forming device together with the drum assembly 2, the gravity of the developing box is borne by the positioning groove 25 through the cooperation between the positioning groove 25 and the support column 315. The separator 32 is higher than the support column 315 in the third direction, and the separator 32 is further back than the support column 315 in the second direction (further from the developing roller 131).

[0149] In this embodiment, when the separation force output member 91 in the image forming device rotates clockwise ( Fig.26The separating member 32 is located on the moving path of the separating force output member 91, so that the separating force output member 91 contacts the separating member 32, and the separating member 32 is subjected to the separating force applied by the separating force output member 91 in the clockwise direction, so that the separating member 32 drives the developing box 1 to rotate clockwise by a certain angle with the supporting column 315 as the rotating axis to overcome the thrust applied by the force applying component, and the developing box 1 moves in the direction away from the photosensitive drum 23, so that the developing roller 131 is separated from the photosensitive drum 23. The developing roller 131 and the photosensitive drum 23 can be completely separated or partially separated. That is, the supporting column 315 in this embodiment can be regarded as the first abutting member.

[0150] When the separation force output member 91 in the image forming device rotates counterclockwise or is no longer driven by the driving force provided by the image forming device, the developing box 1 rotates counterclockwise around the supporting column 315 by a certain angle under the action of the pushing force provided by the force-applying component, so that the developing roller 131 contacts the photosensitive drum 23 again.

[0151] In one embodiment, if Fig. 27 and Fig.28 As shown, the separation member 32 is in the shape of an arc-shaped rib protruding leftward in the first direction, and the separation force receiving surface 325 is in the shape of an arc, and the separation force receiving surface 325 is inscribed in the moving path of the separation force output member 91 on the image forming device, so that when the separation force output member 91 rotates clockwise along the moving path ( Fig.28 C direction), the separation force output member 91 abuts against the separation force receiving surface 325 on the separation member 32 to receive the separation force, so that the second end 12 of the box body 10 overcomes the thrust force and moves, and at the same time, the front end of the first guided portion 122 of the first end 11 of the box body 10 abuts against the drum assembly 2 to form a fulcrum, so that the second end 12 of the box body 10 rotates a certain angle around the fulcrum formed between the front end of the first guided portion 122 and the drum assembly 2, thereby separating the developing roller 131 from the photosensitive drum 23.

[0152] Embodiment five:

[0153] Unless otherwise specified, the structure of the developing box in this embodiment is the same as that in Embodiment 3. The main difference between this embodiment and Embodiment 1 is that the structures of the separating member 32 and the second guided portion 313 are different.

[0154] like Fig.29 and Fig.30As shown, in this embodiment, the second guided portion 313 includes a guide body and an elastic portion 3131, the second abutting surface is arranged on the elastic portion 3131, the elastic portion 3131 protrudes in the radial direction relative to the guide body, the elastic portion 3131 is located at the front end of the second guided portion 313, and the elastic portion 3131 and the guide body are separated from each other in the second direction, that is, the elastic portion 3131 and the guide body are not in contact. The guide body is located at the rear side of the elastic portion 3131. The guide body is used to contact and abut with the first guide surface 221a and the second guide surface 221b of the second guide port 221, and the elastic portion 3131 is used to contact and abut with the abutted surface 221c, that is, the elastic portion 3131 is a first abutting member in this embodiment.

[0155] like Figure 29 to Figure 31 As shown, the separator 32 is fixedly arranged at the second end 12 of the box body 10, and the specific separator 32 is integrally formed with the support member 31 or is separately assembled to the second end 12, and the separator 32 includes a separation guide rail, which extends to the left in the first direction and protrudes from the second end 12 of the box body 10, and the separation guide rail includes a first force receiving surface 32c and a second force receiving surface 32d extending in the front-back direction, and the first force receiving surface 32c and the second force receiving surface 32d are arranged oppositely in the up-down direction and have a gap, and the first force receiving surface 32c is located on the upper side of the second force receiving surface 32d. The third direction intersects with the first force receiving surface 32c and the second force receiving surface 32d. The upper end of the second force receiving surface 32d is also provided with a third guide surface 32e, and the third guide surface 32e is in an arc shape, and the lower end of the third guide surface 32e is connected to the second force receiving surface 32d, and the upper end of the third guide surface 32e is more forward than the lower end of the third guide surface 32e.

[0156] like Figure 29 to Figure 31As shown, when it is necessary to separate the developing roller 131 from the photosensitive drum 23, the image forming device issues an instruction to operate the separation force output member 91 in the image forming device, and the separation force output member 91 moves clockwise along a circular arc trajectory (viewed from left to right). The separation force output member 91 can enter the separation guide rail along the third guide surface 32e, and contact the first force receiving surface 32c to apply a force to the first force receiving surface 32c, so that the first force receiving surface 32c drives the developing box 1 to rotate clockwise around the line connecting the first guided portion 122 and the second guided portion 313 by a certain angle, and then the first pushing portion 1221 and the second pushing portion 312 also rotate clockwise around the line connecting the first guided portion 122 and the second guided portion 313 by a certain angle, so that the first pushing portion 1221 and the second pushing portion 312 are respectively disengaged from the first force applying member 212 and the second force applying member 222 to stop receiving the pushing force. When the first pushing portion 1221 and the second pushing portion 312 receive the pushing force, the pushing force will cause the developing box to tend to move toward the photosensitive drum 23, so that the elastic portion 3131 on the second guided portion 313 is compressed and bent to produce elastic deformation when it contacts the abutted surface 221c. That is to say, the elastic force of the elastic portion 3131 is smaller than the pushing force and therefore cannot overcome the pushing force and recover elastically. When the first pushing portion 1221 and the second pushing portion 312 respectively lose contact with the first force applying member 212 and the second force applying member 222 and stop receiving the pushing force, the elastic portion 3131 recovers elastically, so that the elastic portion 3131 applies an elastic force to the abutted surface 221c, and the elastic portion 3131 is subjected to a reaction force exerted by the abutted surface 221c in the direction away from the photosensitive drum 23, thereby causing the second end 12 of the box body 10 to swing a certain angle in the direction away from the photosensitive drum 23 with the contact point between the first guided portion 122 and the abutted surface 221c of the first guide opening 211 as a fulcrum, thereby causing the box body 10 to drive the left end of the developing roller 131 to move in the direction away from the photosensitive drum 23, causing the developing roller 131 to move from a state parallel to the photosensitive drum 23 to a state inclined relative to the photosensitive drum 23, thereby causing the developing roller 131 to lose contact with the photosensitive drum 23.

[0157] When it is necessary to make the developing roller 131 contact the photosensitive drum 23 again, the image forming device issues a command to operate the separation force output member 91 in the image forming device, and the separation force output member 91 moves counterclockwise along the arc trajectory, and the separation force output member 91 contacts the second force receiving surface 32d, thereby applying a force to the second force receiving surface 32d, so that the developing box 1 rotates counterclockwise around the line connecting the first guided portion 122 and the second guided portion 313 by a certain angle, so that the first pushing portion 1221 and the second forced pushing portion 313 are rotated counterclockwise by a certain angle. The two pushing portions 312 also rotate counterclockwise by a certain angle around the line connecting the first guided portion 122 and the second guided portion 313, so that the first pushing portion 1221 and the second pushing portion 312 are again in contact with the first force applying member 212 and the second force applying member 222 to receive the pushing force, so that the developing box and the developing roller 131 move under the action of the pushing force and overcome the elastic force of the elastic portion 3131, so that the elastic portion 3131 produces elastic deformation and the developing roller 131 is in close contact with the photosensitive drum 23 again.

[0158] In other embodiments, the elastic portion 3131 may also be provided on the first guided portion 122, so that when the first pushing portion 1221 and the second pushing portion 312 do not receive the pushing force, the elastic portion 3131 at the right end of the box body 10 applies an elastic force to the abutted surface 221c of the first guide opening 211, so that the first end 11 of the box body 10 moves away from the photosensitive drum 23 under the elastic force of the elastic portion 3131, so that the right end of the developing roller 131 moves away from the photosensitive drum 23, so that the developing roller 131 moves from a state parallel to the photosensitive drum 23 to a state inclined relative to the photosensitive drum 23, thereby causing the developing roller 131 to break contact with the photosensitive drum 23.

[0159] In other embodiments, the elastic portion 3131 may also be simultaneously provided on the first guided portion 122 and the second guided portion 313, so that the elastic portions 3131 at both ends of the box body 10 apply elastic force to the abutted surface 221c of the first guide port 211 and the abutted surface 221c of the second guide port 221 respectively, so that the first end 11 and the second end 12 of the box body 10 move simultaneously in a direction away from the photosensitive drum 23 under the elastic force of the elastic portion 3131, so that both ends of the developing roller 131 move simultaneously in a direction away from the photosensitive drum 23, so that the separation of the developing roller 131 and the photosensitive drum 23 is more thorough.

[0160] Embodiment six:

[0161] Unless otherwise specified, the structure of the developing box in this embodiment is the same as that in the first embodiment. The main difference between this embodiment and the first embodiment is that the separating piece is arranged at the first end 11 in this embodiment.

[0162] like Fig.32As shown, a separation rod 24 is also provided on the drum assembly 2 , and the separation rod 24 can move relative to the drum assembly 2 . The separation rod 24 is provided at the first side wall 21 , and the separation rod 24 receives a command output by the image forming device to apply a separation force to the developing box 1 .

[0163] like Figure 31-Figure 35 As shown, the separator 32 is arranged at the first end 11. The separator 32 is a protrusion protruding to the right in the first direction. In this embodiment, the separator 32 is preferably formed integrally with the first guided portion 122, or it can be a separate combination. The separator 32 can receive the separation force applied by the separation rod 24.

[0164] The first abutment 34 in contact with the external component is arranged at the second end 12. The first abutment 34 is preferably formed integrally with the second guided portion 313, or may be a separate combination. The first abutment 34 radially protrudes relative to the second guided portion 313, extends in the first direction, and the first abutment 34 at least partially overlaps with the developing roller 131. When the developing box 1 is fully installed on the drum assembly 2, the first abutment 34 contacts the first abutted portion 2211, and the contact position is the first position. The first abutment 34 is preferably an arc-shaped recessed portion, which can prevent the first abutment 34 from interfering with the first abutted portion 2211 when the developing box 1 is installed on the drum assembly 2, and can also make the first abutment 34 stably contact the first abutted portion 2211. In other embodiments, the first abutment 34 may be a protrusion of other shapes. The position where one end of the developing roller 131 located at the second end 12 contacts the photosensitive drum 23 is the second position, and the first position is located outside the second position. Further, in the first direction, the first position is farther away from the first end 11 than the second position, that is, the contact position between the first abutting member 34 and the first abutted portion 2211 is located outside the contact position between the developing roller 131 and the photosensitive drum 23. In one embodiment, the first abutting member 34 can be farther away from the developing roller 131 and located at the second end 12.

[0165] like Fig.33 , Fig.36 and Fig.37As shown, when the separation lever 24 does not receive the separation instruction of the image forming device, the separation lever 24 does not apply the separation force to the separation member 32, and the developing roller 131 contacts the photosensitive drum 23. When the separation lever 24 receives the separation instruction, the separation lever 24 abuts against the separation member 32 to apply the separation force thereto, and the separation member 32 transmits the separation force to the box body 10, so that the box body 10 moves in the direction away from the photosensitive drum 23, and further, the first end 11 moves in the direction away from the photosensitive drum 22, and because the first position is located outside the contact position (second position) of the developing roller 131 with the photosensitive drum 23, the box body 10 can be made to swing in the direction away from the photosensitive drum 23 with the first end 11 receiving the separation force with the first position as the fulcrum, and the entire box body 10 overcomes the forced thrust force applied by the force-applying assembly, thereby separating the developing roller 131 from the photosensitive drum 23. It is also possible that after the separation member 32 receives the separation force, the first abutting member 34 contacts the first abutted portion 2211.

[0166] It can be known that the distance generated by the movement of the second end 12 of the box body 10 is smaller than the second distance generated by the movement of the first end 11, that is, in the first direction from left to right, the gap between the developing roller 131 and the photosensitive drum 23 gradually increases, that is, the gap between the end of the developing roller 131 at the second end 12 and the photosensitive drum 23 is smaller than the gap between the other end at the first end 11 and the photosensitive drum 23.

[0167] In other embodiments, the first abutting member 34 may not be provided, and the position where the peripheral surface of the second guided portion 313 abuts against the abutted surface 221c of the second guide opening 221 is used as a fulcrum. This embodiment does not limit the specific position of the first abutting member 34, and the first abutting member 34 may abut against the drum assembly 2 when the developing cartridge 1 receives the separation force.

[0168] In other embodiments, Fig.38 As shown, the separating member 32 is also provided with a separating inclined surface 32f, the front end of the separating inclined surface 32f is inclined upwards compared to the rear end, and the first direction, the second direction and the third direction intersect with the separating inclined surface 32f. When the separating rod 24 moves, the separating rod 24 abuts against the separating inclined surface 32f, thereby sliding on the separating inclined surface 32f, so that the separating rod 24 applies a force perpendicular to the separating inclined surface 32f to the separating inclined surface 32f. Since the second direction and the third direction intersect with the separating inclined surface 32f, this force has a component force in the second direction and the third direction, so that the separating member 32 is subjected to a backward and upward force and drives the first end 11 of the box body 10 to swing around the first position (the contact position of the first abutting member 34 and the first abutted portion 2211), thereby realizing the separation of the developing roller 131 and the photosensitive drum 23.

[0169] When the image forming device stops providing power to the separation rod 24 , the first end 11 of the cartridge body 10 falls down under the effect of the weight of the developing cartridge itself, so that the developing roller 131 and the photosensitive drum 23 are restored to a contact state.

[0170] Embodiment seven:

[0171] The main difference between this embodiment and the sixth embodiment is that the first abutting member 34 b in this embodiment is farther away from the developing roller 131 than that in the sixth embodiment.

[0172] like Fig.40 As shown, the drum assembly 2 is provided with a third abutted portion 2213, which is further away from the photosensitive drum 23 than the first abutted portion 2211. The third abutted portion 2213 is an arc-shaped opening facing away from the photosensitive drum 23.

[0173] like Fig.39 and Fig.40 As shown, a first abutment 34b is provided at the second end 12, and the first abutment 34b is a protrusion extending in the first direction, and in this embodiment, it is preferably a cylindrical protrusion. In the second direction, the first abutment 34b is located between the powder filling port 123 and the second guided portion 312. When the developer cartridge 1 is installed to the drum assembly 2, the third abutted portion 2213 contacts the first abutment 34b, and the contact position is the first position. The position where one end of the developing roller 131 located at the second end 12 contacts the photosensitive drum 23 is the second position, and the first position is located outside the second position. Further, in the first direction, the first position is farther away from the first end 11 than the second position, that is, the contact position of the first abutment 34b and the drum assembly 2 is located outside the contact position of the developing roller 131 and the photosensitive drum 23.

[0174] When the separating member 32 receives the separating force applied by the separating rod 24 , the box body 10 swings with the first position as a fulcrum, so that the developing box 1 swings in a direction away from the photosensitive drum 23 , thereby separating the developing roller 131 from the photosensitive drum 23 .

[0175] Further, if Fig.39 and Fig.40As shown, the developing box 1 is also provided with a second abutting member 35 located at the second end 12. The second abutting member 35 is a protrusion extending along the first direction. In this embodiment, it is preferably a cylindrical protrusion. In the third direction, the second abutting member 35 is located above the first abutting member 34b. A fourth abutted portion 26 abutting against the second abutting member 35 is provided in the image forming device. The fourth abutted portion 26 is preferably a guide rail in the image forming device. The fourth abutted portion 26 is located above the second abutting member 35, that is, the second abutting member 35 abuts against another external component. Since the third abutted portion 2213 is an arc-shaped opening, when the box body 10 swings with the first position as a fulcrum, the fourth abutted portion 26 abuts against the second abutting member 35 to prevent the third abutted portion 2213 from being out of contact with the first abutting member 34b, so as to ensure that the box body 10 can stably swing in a direction away from the photosensitive drum 23 with the first position as a fulcrum. The second abutment 35 can make the swing of the developer box 1 more stable. In some embodiments, the developer box 1 can be swung in the first position without the second abutment 35. In other embodiments, the second abutment 35 is not provided, and an anti-separation structure such as a buckle is provided at the first abutment 34b, so that the first abutment 34b is in stable contact with the third abutted portion 2213.

[0176] Embodiment eight:

[0177] Unless otherwise specified, the structure of the developing box in this embodiment is the same as that in Embodiment 1. The main difference between this embodiment and Embodiment 1 is that no force-applying portion 323 is provided at the lower end of the separating member 32, and a flexible member 54, such as a steel wire rope, a nylon rope, etc., is fixedly connected to the lower end of the separating member 32.

[0178] like Figure 41 to Figure 43 As shown, the separation member 32 is slidably arranged on the support portion 311, and the support portion 311 is a first slide rail arranged on the support member 31. The second end 12 of the box body 10 is also fixedly provided with a second slide rail 56. The second slide rail 56 is integrally formed and fixedly arranged on the support member 31. The extension direction of the second slide rail 56 intersects with the second direction and the third direction at the same time. A separation slider 55 is slidably installed in the second slide rail 56. The separation slider 55 can be displaced in the second direction and the third direction along the second slide rail 56 relative to the box body 10. The separation slider 55 extends to the left along the first direction and extends to the left from the second slide rail 56, and the part of the separation slider 55 extending out of the second slide rail 56 is cylindrical.

[0179] The second side wall 22 of the drum assembly 2 is provided with a second abutted portion 2212 protruding upward. When the developing cartridge is mounted on the drum assembly 2, the second abutted portion 2212 is located on the moving path of the separation slider 55.

[0180] One end of the flexible member 54 is fixedly connected to the separation member 32 , and the other end is fixedly connected to the second end 12 of the box body 10 . The separation slider 55 is located between the two ends of the flexible member 54 , and the flexible member 54 abuts against the separation slider 55 to form a bend.

[0181] When the developing roller 131 needs to be out of contact with the photosensitive drum 23, the image forming device applies a separation force to the separating member 32, so that the separating member 32 slides downward along the supporting portion 311. During the downward sliding process of the separating member 32, the flexible member 54 is pulled, and the flexible member 54 drives the separating slider 55 to move along the second slide rail 56, so that the separating slider 55 moves downward relative to the box body 10 in the second direction and moves forward relative to the box body 10 in the third direction. At the same time, during the movement of the separating slider 55, it contacts the second abutted portion 2212 and receives a substantially upward reaction force provided by the second abutted portion 2212. At the same time, the separating slider 55 has a distance from the first guided portion 122 and the second guided portion 313 in the front-to-back direction, that is, the reaction force acts on the position of the box body 10 that deviates from the line connecting the first guided portion 122 and the second guided portion 313, so that the box body 10 can rotate clockwise around the line connecting the first guided portion 122 and the second guided portion 313 by a certain angle, thereby realizing the separation of the developing roller 131 from the photosensitive drum 23.

[0182] In other embodiments, the flexible member 54 may be fixedly connected to the separation member 32 at one end and directly fixedly connected to the separation slider 55 at the other end. The flexible member 54 may also be configured as a tension spring.

[0183] Embodiment nine:

[0184] Unless otherwise specified, the structure of the developing box in this embodiment is the same as that in the eighth embodiment. The main difference between this embodiment and the eighth embodiment is that the arrangement of the flexible member is different.

[0185] like Figure 44 to Figure 47 As shown, a first connecting portion is fixedly provided on the first protective cover 111 at the first end 11 of the box body 10, and a second connecting portion is fixedly provided on the supporting member 31 at the second end 12 of the box body 10. The first connecting portion includes a first extending portion 521 extending to the right along the first direction and a second extending portion 522 extending downward from the right end of the first extending portion 521, and the right end of the flexible member 54 is fixedly connected to the second extending portion 522. The second connecting portion includes a third extending portion 531 extending to the left along the first direction and a fourth extending portion 532 extending downward from the left end of the third extending portion 531, and the left end of the flexible member 54 is fixedly connected to the fourth extending portion 532. The flexible member 54 extends from the first end 11 to the second end 12 of the box body 10 in the first direction.

[0186] The lower end of the separation member 32 abuts against a portion between the left end and the right end of the flexible member 54 .

[0187] When the developing box 1 is installed on the drum assembly 2, the second side wall 22 is located between the separating piece 32 and the fourth extending portion 532 in the first direction, and the flexible piece 54 between the separating piece 32 and the fourth extending portion 532 is compressed by the second side wall 22 and bent. Similarly, the first side wall 21 is located between the first protective cover 111 and the second extending portion 522, and the flexible piece 54 between the first protective cover 111 and the second extending portion 522 is compressed by the first side wall 21 and bent.

[0188] When the developing roller 131 needs to be out of contact with the photosensitive drum 23, the image forming device applies a separation force to the separating member 32, so that the separating member 32 slides downward along the supporting portion 311, thereby pushing the flexible member 54, so that the flexible member 54 is gradually straightened, and then the part of the flexible member 54 that contacts the first side wall 21 and the second side wall 22 applies a force to the first side wall 21 and the second side wall 22, and at the same time, the first side wall 21 and the second side wall 22 apply an upward reaction force to the flexible member 54, and at the same time, the position where the flexible member 54 contacts the first side wall 21 and the second side wall 22 is at a distance from the first guided portion 122 and the second guided portion 313 in the front-to-back direction, that is, the reaction force acts on the position where the box body 10 deviates from the line connecting the first guided portion 122 and the second guided portion 313, so that the box body 10 can rotate clockwise around the line connecting the first guided portion 122 and the second guided portion 313 by a certain angle, thereby realizing the separation of the developing roller 131 and the photosensitive drum 23.

[0189] Embodiment ten:

[0190] like Fig.48 and Fig.49 As shown, this embodiment discloses a forced pushing assembly different from the first embodiment.

[0191] like Fig.49As shown, the forced pushing assembly includes a first forced pushing portion 611 and a second forced pushing portion 612. In this embodiment, the first forced pushing portion 611 has the same structure as the second forced pushing portion 612. The first forced pushing portion 611 includes a first retaining member 6111, a first elastic component 6112, and a first contact member 6113, and the second forced pushing portion 612 includes a second retaining member, a second elastic component, and a second contact member. The structure of the first pushing portion 611 is taken as an example for detailed description. The first retaining member 6111 is fixedly arranged at the first end 11 of the box body 10. Specifically, the first retaining member 6111 is integrally formed and fixedly arranged at the lower end of the first protective cover 111. The first retaining member 6111 is in the shape of a groove recessed forward. The first contact member 6113 can be slidably installed in the sliding hole along the first retaining member 6111. The left and right walls of the first retaining member 6111 are provided with a first limiting hole 6114 extending in the second direction. The first contact member 6113 is provided with a first claw 6115. The first claw 6115 is inserted into the first limiting hole 6114 and can move relative to the first limiting hole 6114. The first limiting hole 6114 can abut against the first claw 6115 to limit the moving range of the first contact member 6113 in the front and rear directions. A guide groove 6116 extending along the second direction is further provided on the lower wall of the first retaining member 6111, and a guide rib 6117 inserted into the guide groove 6116 and abutting against the left and right walls of the guide groove 6116 is provided on the first contact member 6113. The guide groove 6116 is used to limit the displacement of the first contact member 6113 in the left and right directions. The first elastic component 6112 is provided between the front wall of the first retaining member 6111 and the first contact member 6113, one end of the first elastic component 6112 abuts against the front wall of the first retaining member 6111, and the other end abuts against the first contact member 6113, and the first elastic component 6112 extends in the front-back direction.

[0192] When viewed along the third direction, the projection of the driving gear 402 overlaps with the projection of the first pushing portion 611 , which may be a partial overlap or a complete overlap.

[0193] The difference between the second forced pushing portion 612 and the first forced pushing portion 611 is that the second retaining member is fixedly disposed at the second end 12 of the box body 10 by means of integral molding, and the rest of the structure is the same or similar to that of the first forced pushing portion 611 .

[0194] The second urging portion 612 is located behind the first urging portion 611 in the second direction, that is, the distance between the first urging portion 611 and the developing roller 131 in the second direction is smaller than the distance between the second urging portion 612 and the developing roller 131 .

[0195] When the developing box 1 is installed on the drum assembly 2, the first contact member 6113 and the second contact member abut against the drum assembly 2 so that the developing box 1 receives the reaction force of the drum assembly 2, so that the first elastic member 6112 and the second elastic member are compressed in the second direction, and then the box body 10 moves forward under the reaction force of the drum assembly 2 so that the developing roller 131 presses forward against the surface of the photosensitive drum 23, thereby ensuring close contact between the developing roller 131 and the photosensitive drum 23.

[0196] Embodiment eleven:

[0197] Unless otherwise specified, the structure of the developing box in this embodiment is the same as that in the first embodiment. The main difference between this embodiment and the first embodiment is the different structure of the transmission assembly.

[0198] like Figure 50 to Figure 52 As shown, the transmission assembly eliminates the stirring gear 46 and the third idler gear 45, and the first end 11 of the box body 10 is detachably fixedly mounted with a first bearing 47 by means of screws or buckles. The first bearing 47 is provided with a second developing support hole 471 and a second powder feeding support hole 472 that penetrate the first bearing 47 in the first direction. The right end of the developing roller 131 and the right end of the powder feeding roller 132 are respectively inserted into the second developing support hole 471 and the second powder feeding support hole 472 and are rotatably supported. The developing gear 41 and the powder feeding gear 42 are located on the right side of the first bearing 47 and are coaxially fixedly mounted to the right end of the developing roller 131 and the right end of the powder feeding roller 132. A first support shaft 474 and a second support shaft 475 that protrude to the right are integrally formed on the right surface of the first bearing 47. The first idler gear 43 is coaxially mounted on the first support shaft 474 and is rotatably supported by the first support shaft 474. The second idler gear 44 is coaxially mounted on the second support shaft 475 and is rotatably supported by the second support shaft 475.

[0199] like Figures 50 to 52 As shown, a driving support shaft 473 protruding to the right is integrally formed on the first bearing 47, and the driving unit 40 is coaxially mounted on the driving support shaft 473 and rotatably supported by the driving support shaft 473. The driving gear 402 is meshed with the first idler gear 43, the first idler gear 43 is meshed with the second idler gear 44, and the second idler gear 44 is meshed with the developing gear 41 and the powder feeding gear 42 at the same time to transmit power. In the second direction, the first idler gear 43 and the second idler gear 44 are located between the rotation axis of the driving unit 40 and the rotation axis of the developing gear 41. Through the above design, the developing gear 41 and the powder feeding gear 42 are driven at the same time, avoiding the asynchronous rotation of the developing roller 131 and the powder feeding roller 132.

[0200] like Fig.50As shown, the stirring frame 134 is arranged to rotate coaxially with the driving part 40, the right end of the stirring frame 134 extends out of the first end 11 of the box body 10, and the first bearing 47 is provided with a first through hole 4731 for the right end of the stirring frame 134 to pass through, the driving support shaft 473 is a hollow cylindrical shape, and the first through hole 4731 is surrounded by the driving support shaft 473 inside the driving support shaft 473, so that the right end of the stirring frame 134 extends into the interior of the driving support shaft 473 through the first through hole 4731.

[0201] like Fig.51 and Fig.52 As shown, the driving part 40 includes a first circular tube part 403 , a second circular tube part 404 , a partition plate 407 , a power receiving part 401 , and a driving gear 402 , which are integrally formed or separately fixedly connected as one.

[0202] like Figures 50 to 52 As shown, this embodiment specifically introduces an integrally formed driving portion 40, the central axes of the first circular tube portion 403 and the second circular tube portion 404 are parallel to the first direction, the central axes of the first circular tube portion 403 and the second circular tube portion 404 are coaxial, in the first direction, the partition plate 407 is located between the first circular tube portion 403 and the second circular tube portion 404, and the first circular tube portion 403 and the second circular tube portion 404 are integrally connected together through the partition plate 407, the first circular tube portion 403 is further to the right (i.e., farther away from the box body 10) than the second circular tube portion 404, the power receiving portion 401 is integrally formed inside the first circular tube portion 403, the power receiving portion 401 protrudes along the radial direction of the first circular tube portion 403 toward the direction close to the central axis of the first circular tube portion 403, and the power receiving portion 401 is integrally connected to the inner circumferential surface of the first circular tube portion 403 and the right end face of the partition plate 407.

[0203] like Figures 50 to 52 As shown, the driving gear 402 is coaxially and integrally formed with the second circular tube portion 404 and is arranged on the outer peripheral surface of the second circular tube portion 404, and the driving gear 402 is further to the left (i.e., closer to the box body 10) than the power receiving portion 401, and a transmission column 405 coaxial with the driving gear 402 is integrally formed on the left end face of the partition 407, and a transmission hole 406 formed by being recessed from left to right is integrally formed on the transmission column 405, and the transmission hole 406 is a D-shaped hole, and a D-shaped portion 1341 matching the transmission hole 406 is provided at the right end of the stirring frame 134, and the D-shaped portion 1341 is inserted into the D-shaped hole so that the power of the driving portion 40 can be directly transmitted to the stirring frame 134 without the need for transmission through an intermediate gear, thereby simplifying the structure, reducing the number of parts, and reducing costs.

[0204] The stirring frame 134 in this embodiment is closer to the developing roller 131 and the powder feeding roller 132 in the front-to-back direction compared to the prior art (in the prior art, the rotation axis of the stirring frame 134 is farther from the rotation axis of the developing roller 131 in the front-to-back direction than the rotation axis of the power receiving part 401). When the developing box disclosed in this embodiment is installed in the image forming device, if the direction of gravity is roughly parallel to the second direction (i.e., the front-to-back direction), the developer in the box body 10 will naturally fall toward the front end of the box body 10 (i.e., the third end 13 where the developing roller 131 is located) under the action of gravity, so the developer will not accumulate at the rear end of the box body 10. Therefore, setting the stirring frame 134 to be coaxial with the driving part 40 can improve the stirring efficiency and avoid the stirring frame 134 stirring to a position where there is no developer. In some embodiments, the stirring frame 134 may not be provided, and only gravity is used to make the developer flow in the direction of gravity, and the developer is transferred to the powder feeding roller 132 and the developing roller 131. If the direction of gravity is substantially perpendicular to the second direction, the stirring frame 134 may be provided with blades or the stirring blades may be enlarged so that the stirring frame 134 can more fully stir the developer in the box body 10 .

[0205] 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 developing cartridge, detachably mounted on a drum assembly including a photosensitive drum, the developing cartridge comprising: A box body, used for storing developer, the box body having a first end and a second end oppositely disposed in a first direction, and a third end and a fourth end oppositely disposed in a second direction, wherein the first direction and the second direction intersect; a developing roller, rotating about an axis extending in a first direction, contacting the photosensitive drum to transfer developer, and located at the third end; The driving part receives external power to rotate and is located at the first end. It is characterized by further comprising: a separation member, receiving the separation force and driving the box body to move, so that the developing roller is out of contact with the photosensitive drum, and the separation member is located at the first end or the second end, A first abutment member is configured to contact an external component when the developing roller and the photosensitive drum are out of contact.

2. The developing cartridge according to claim 1, characterized in that: The separating member is located at the second end, the first abutting member is located at the first end, the separating member receives the separating force to make the second end move in a direction away from the photosensitive drum, and the first abutting member makes the first end move in a direction away from the photosensitive drum.

3. The developing cartridge according to claim 2, characterized in that: The second end is provided with a second abutment member, which is arranged diagonally to the first abutment member. In the second direction, the distance between the second abutment member and the developing roller is smaller than the distance between the first abutment member and the developing roller.

4. The developing cartridge according to claim 3, characterized in that: The box body uses the first abutment member and the second abutment member as fulcrums and moves away from the photosensitive drum through a swinging motion.

5. The developing cartridge according to claim 3, characterized in that: The first end is provided with a bracket, the bracket is used to support the electrical contact surface of the storage medium, the storage medium stores the information of the developing box, and the bracket is a first abutment member. The second end is provided with a second guided portion, the second guided portion guides the developing box to be installed on the drum assembly, and the second guided portion is the second abutting member.

6. The developing cartridge according to claim 2, characterized in that: The separating member slides relative to the box body after receiving the separating force, and its sliding direction intersects with the first direction. The separating member includes a force-bearing portion and a force-applying portion. The force-bearing portion receives the separating force to make the separating member move relative to the box body, and the force-applying portion is an inclined surface whose extending direction intersects with the first direction and the second direction.

7. The developing cartridge according to claim 2, characterized in that: The first abutment member extends in the first direction, and in the second direction, the first abutment member is located between the rotation axis of the driving portion and the rotation axis of the developing roller.

8. The developing cartridge according to claim 2, wherein: In the first direction, a contact position of the first abutment member with the external component is located outside a contact position of the developing roller with the photosensitive drum.

9. The developing cartridge according to claim 8, characterized in that: After the developing roller is out of contact with the photosensitive drum, the gap between the developing roller and the photosensitive drum gradually decreases in the first direction from the second end to the first end.

10. The developing cartridge according to claim 2, characterized in that: The separation member includes a force applying portion contacting the external component, and the force applying portion is stepped.

11. The developing cartridge according to claim 1, characterized in that: The separating member is located at the second end, the separating member cannot move relative to the box body, the separating member protrudes in a first direction, and the separating member includes a separating force receiving surface which is an arc surface, and the separating force receiving surface receives the separating force.

12. The developing cartridge according to claim 11, characterized in that: The first abutment member is located at the second end and extends in the first direction, the first abutment member contacts the external component, and the separation member drives the box body to swing with the first abutment member as the swing center after receiving the separation force.

13. The developing cartridge according to claim 1, wherein: The separating member is located at the first end, the separating member protrudes in a first direction, the separating member receives the separating force and causes the first end to move in a direction away from the photosensitive drum, the first abutting member is located at the second end, the first abutting member and the second end move in a direction away from the photosensitive drum.

14. The developing cartridge according to claim 13, wherein: The separation member drives the box body to swing with the first abutment member as a fulcrum.

15. The developing cartridge according to claim 13, characterized in that: A contact position of the first abutment member with the drum assembly in the first direction is outside a contact position of the developing roller with the photosensitive drum.

16. The developing cartridge according to claim 15, characterized in that: After the developing roller is out of contact with the photosensitive drum, the gap between the developing roller and the photosensitive drum gradually decreases in the first direction from the first end to the second end.

17. The developing cartridge according to claim 13, characterized in that: The second end is provided with a second guided portion, and when the developing cartridge is mounted to the drum assembly, the second guided portion plays a guiding role, and the first abutment member radially protrudes relative to the second guided portion.

18. The developing cartridge according to claim 17, characterized in that: The first abutment member is an arc-shaped recessed portion, and when viewed along the first direction, the first abutment member at least partially overlaps with the developing roller.

19. The developing cartridge according to claim 13, characterized in that: The invention also includes a second abutment member located at the second end, wherein the first abutment member and the second abutment member extend in a first direction.

20. The developing cartridge according to claim 19, wherein: In a third direction intersecting the first direction, the second abutment is located above the first abutment, the second abutment abuts against another external component that is different from the external component, and the second abutment keeps the first abutment and the external component in abutment.

21. The developing cartridge according to claim 13, characterized in that: The separation member includes a separation slope intersecting the first direction and the second direction, and the separation slope decomposes the separation force to make the box body swing.

22. The developing cartridge according to claim 1, characterized in that: The first abutting member is a flexible member, which extends in a first direction. The flexible member is driven by the separating member to move, and the flexible member enables the box body to move away from the photosensitive drum.

23. The developing cartridge according to claim 1, characterized in that: The device also includes a stirring frame, which stirs the developer in the box body and is coaxially rotatable with the driving part.

24. The developing cartridge according to claim 1, characterized in that: There is no stirring frame in the box body. When the developing box is installed in the image forming device, the second direction is the gravity direction. The developer in the box body flows toward the developing roller under the action of gravity, so that the developing roller absorbs the developer.

25. The developing cartridge according to claim 1, characterized in that: It also includes a forced pushing assembly, which is in contact with the drum assembly so that the developing roller is in close contact with the photosensitive drum, and the forced pushing assembly includes a first forced pushing portion and a second forced pushing portion. In the second direction, a distance between the first urging portion and the developing roller is smaller than a distance between the second urging portion and the developing roller.

26. The developing cartridge according to claim 25, characterized in that: When viewed along a third direction intersecting the first direction and the second direction, a projection of the driving portion overlaps with a projection of the first pushing portion.

Images