CN220913502U - Developing box - Google Patents

Abstract

The present utility model provides a developing cartridge detachably mountable to an electronic image forming apparatus having a pressing member, the developing cartridge comprising: a housing; a developing roller rotatably supported on the housing; the separation member comprises a first stress part, a connecting part and a second stress part, wherein the first stress part is used for receiving a first external force to enable the separation member to move, the second stress part is used for receiving a second external force to force the developing roller to move from a contact position to a separation position in the moving process of the separation member, and the connecting part is used for connecting the first stress part and the second stress part; a guide portion, located at a first end of the developing cartridge, for guiding movement of the separation member; the developing box with the structure solves the problems that when the developing roller does not work, the developing roller is contacted with the photosensitive drum for a long time, pollution is caused to the photosensitive drum, the service life of the photosensitive drum is shortened, and the printing effect of the electronic imaging equipment is poor.

Description

Developing box

Technical Field

The utility model relates to the field of electronic imaging equipment, in particular to a developing box.

Background

The existing developing box is detachably arranged in the electronic imaging equipment and comprises a shell, a stirring frame, a developing roller and a powder feeding roller, wherein the shell contains developer, when the developing box works, the developing roller is in contact with a photosensitive drum in the electronic imaging equipment, the stirring frame stirs the developer in the shell, the powder feeding roller conveys the developer in the shell to the developing roller, and the developing roller conveys the developer to the photosensitive drum, so that the developing process is completed.

However, if the developing roller in the non-operating state is kept in contact with the photosensitive drum in the electronic image forming apparatus for a long period of time, the developing roller may contaminate or damage the photosensitive drum, thereby leading to a shortened life of the photosensitive drum and a deteriorated printing effect of the electronic image forming apparatus.

Further, a plurality of developing cartridges respectively accommodating yellow, red, blue and black developers are mounted on an electronic image forming apparatus having a color printing function, and when the electronic image forming apparatus is in need of printing only a black-and-white image without printing a color image, the developing cartridges other than the developing cartridge accommodating the black developer are not required to be used, and the developing rollers among these developing cartridges are required to be moved in a direction away from the photosensitive drum so that the developing rollers are separated from the photosensitive drum.

Based on the above background, separating a developing roller of a developing cartridge mounted in an electronic image forming apparatus from a photosensitive drum is a technical problem that is currently required to be solved.

In addition, how to rationally arrange the developing cartridge so that the developing cartridge is miniaturized as much as possible, which occupies a large space at the end of the developing cartridge, is also an important subject of continued study by those skilled in the art.

Disclosure of utility model

The utility model provides a developing box, which enables a developing roller of the developing box to be separated from a photosensitive drum, and solves the problem that the contact between the developing roller and the photosensitive drum pollutes the photosensitive drum for a long time when the developing roller does not work.

In order to solve the problems, the utility model is realized by the following technical scheme:

A developing cartridge detachably mountable to an electronic image forming apparatus having a pressing member, comprising: a housing having a developer accommodating portion; a developing roller rotatably supported on the housing and movable between a contact position and a separation position; a separation mechanism provided on the developing cartridge; the separation mechanism includes: a separation member including a first force receiving portion for receiving a first external force to move the separation member, a connecting portion for connecting the first force receiving portion and the second force receiving portion, and a second force receiving portion for receiving a second external force to force the developing roller to move from the contact position to the separation position in a process of moving the separation member; and a guide portion, located at a first end of the developing cartridge, for guiding movement of the separation member.

Preferably, the developing cartridge is detachably mounted to a drum cartridge having a photosensitive drum, the developing roller facing the photosensitive drum; the direction of the first external force is parallel to the direction of the developing cartridge mounted to the drum cartridge or forms an acute angle with the direction of the developing cartridge mounted to the drum cartridge.

The developing cartridge with the structure can also realize that the developing roller moves to the separation position when the direction of the first external force is parallel to the direction of the developing cartridge mounted to the drum cartridge or forms an acute angle with the included angle of the direction of the developing cartridge mounted to the drum cartridge, so that the developing cartridge can adapt to various different machine environments.

Preferably, the guide portion is provided on a side surface of the first end cap.

The developing cartridge with the above structure has the guide part arranged on the end cover for convenient assembly and simplified structure.

Preferably, the guide portion has a first guide section and a second guide section, wherein the second guide section is located upstream of the first guide section in a separation direction in which the developing roller is separated from the photosensitive drum, and the first guide section and the second guide section are not located on the same straight line.

The developing cartridge having the above-described structure, the guide portion is capable of changing the moving direction of the separation member, so that the second external force can be received, causing the developing cartridge/developing roller to move to the separation position.

Preferably, the first guide section extends along a direction from a rear side of the developing cartridge toward a front side of the developing cartridge, and the second guide section extends curvedly from an end of the first guide section.

The developing cartridge with the above structure has a more simplified structure.

Preferably, the guide portion is provided as a guide groove, the first guide section is configured as a linear structure, the second guide section is configured as an arc structure, and the first guide section and the second guide section are connected.

The developing cartridge with the above structure has a more simplified structure.

Preferably, the separation mechanism is provided at an upper side of the developing cartridge.

Preferably, the guide part has a first guide section, a second guide section, and a third guide section, wherein the first guide section and the second guide section extend in a front-rear direction of the developing cartridge, the first guide section is located below the second guide section, and the third guide section connects the first guide section and the second guide section.

Preferably, the first stress part and the second stress part are in sliding connection with the guide part; the second external force is the reverse acting force of the blocking component received by the second stress part in the moving process.

The developing cartridge with the above structure has a more simplified structure.

Preferably, the separating mechanism is further provided with an elastic restoring member for restoring the separating member to the initial position when the separating member is not acted by the first external force.

The other object of the utility model is achieved by the following technical scheme:

A developing cartridge detachably mountable to an image forming apparatus having an electronic image forming device, comprising: a housing having a developer accommodating portion; a developing roller rotatably supported on the housing; a driving unit disposed at a first end of the developing cartridge for coupling with a driving head of an electronic image forming apparatus to receive a driving force for driving the developing roller to rotate; the driving unit comprises an input part, a stirring member gear, a first transition gear, a second transition gear, a powder feeding roller gear and a developing roller gear, wherein the input part can be meshed with the electronic imaging equipment to receive driving force, the input part is meshed with the stirring member gear and the first transition gear at the same time, the first transition gear is meshed with the second transition gear, and the second transition gear is meshed with the powder feeding roller gear and the developing roller gear.

The arrangement of the wheel is beneficial to the miniaturization design of the end part of the developing box.

Preferably, the input part is provided with a main body part and a gear part positioned at one end, the gear part is a hollow gear, the circumference outer side surface of the gear part is provided with a first tooth part, the hollow part of the gear part extends out of a driving shaft, and the circumference surface of the driving shaft is provided with a second tooth part; the stirring member gear has a hollow portion, and an inner circumferential surface of the hollow portion of the stirring member gear is provided with a third tooth portion that meshes with the second tooth portion.

When the input part and the stirring component gear are required to rotate in the same direction, the transition wheel is not required to be arranged between the input part and the stirring component gear, so that parts can be saved, and the miniaturization of the developing box is realized.

Preferably, the input portion is engaged with a tooth portion on the outer circumferential side of the stirring member gear to transmit the driving force.

Preferably, the stirring member gear is connected to an end of the stirring member.

Preferably, the second transition gear is meshed with the powder feeding roller gear and the developing roller gear at the same time.

The beneficial effects of the utility model are as follows:

The problems that when the developing roller does not work, the developing roller is in long-term contact with the photosensitive drum, pollution is caused to the photosensitive drum, the service life of the photosensitive drum is shortened, and the printing effect of the electronic imaging device is poor are solved, and when the electronic imaging device with a color printing function only needs to print black and white images and does not need to print color images, other developing boxes except for the developing box containing black developer are not needed, and the developing roller in the developing boxes is required to be moved towards a direction far away from the photosensitive drum, so that the developing roller is separated from the photosensitive drum are solved; the miniaturization of the developing box is realized.

Drawings

Fig. 1 is a schematic view of the overall structure of a developing cartridge of embodiment 1 of the present utility model;

fig. 2 is a schematic view of the overall structure of the developing cartridge of embodiment 1 of the present utility model at another angle;

fig. 3 is a partially exploded view of the first end of the developing cartridge of embodiment 1 of the present utility model;

fig. 4 is a schematic structural view of a first end cap and a separation mechanism of the developing cartridge of embodiment 1 of the present utility model;

Fig. 5 is a schematic view of another angle of the first end cap and the separation mechanism of the developing cartridge of embodiment 1 of the present utility model;

Fig. 6 is a schematic view showing a structure of the developing cartridge of embodiment 1 of the present utility model with the first end cap and the separation mechanism broken away;

Fig. 7 is a schematic view of another angle of the first end cap and the separation mechanism of the developing cartridge of embodiment 1 of the present utility model;

fig. 8 is a schematic structural view of a fixing member and a separation mechanism of the developing cartridge of embodiment 1 of the present utility model;

Fig. 9 is a schematic view of another angle of the fixing member and the separation mechanism of the developing cartridge of embodiment 1 of the present utility model;

Fig. 10 is a schematic view showing a structure of the developer cartridge of embodiment 1 of the present utility model after the fixing member and the separating mechanism are disassembled;

Fig. 11 is a schematic view of another angle of the fixing member and the separation mechanism of the developing cartridge of embodiment 1 of the present utility model;

fig. 12 is a schematic view of the overall structure of the developing cartridge of embodiment 2 of the present utility model;

Fig. 13 is a partially exploded view of the developing cartridge of embodiment 2 of the present utility model;

Fig. 14 is a schematic view after the hidden part structure of the developing cartridge of embodiment 2 of the present utility model;

fig. 15 is a diagram showing the fitting relationship between the separation member and the blocking member when the developing roller of the developing cartridge of embodiment 2 of the present utility model is in the contact position;

fig. 16 is a diagram showing the fitting relationship of the separation member and the blocking member in the separation position of the developing roller of the developing cartridge of embodiment 2 of the present utility model;

Fig. 17 is a schematic view of the overall structure of the developing cartridge of embodiment 3 of the present utility model;

fig. 18 is a schematic diagram of the overall structure of a drive unit of embodiment 4 of the present utility model;

Fig. 19 is a schematic overall structure of another view of the driving unit of embodiment 4 of the present utility model;

fig. 20 is a schematic overall structure of a drive unit of embodiment 5 of the present utility model;

Fig. 21 is a schematic overall structure of another view of the driving unit of embodiment 5 of the present utility model.

Detailed Description

The utility model is further described below with reference to examples and figures thereof.

Example 1

For the convenience of understanding the description, the respective directions of the developing cartridge 10 in the drawings are set for the description of the following description, and as shown in fig. 1, the direction P in which the developing cartridge 10 is mounted into the drum cartridge is set as a first direction in which the side of the developing roller 2 is the front side and the opposite side of the developing cartridge 10 is the rear side; the direction parallel to the longitudinal direction of the developing cartridge 10 is taken as a second direction Q, the direction M perpendicular to the first direction and the second direction is taken as a third direction, and the up-down direction of the developing cartridge 10 is parallel to the M direction.

In the present embodiment, the developing cartridge 10 is detachably mounted to a drum cartridge having a photosensitive drum, and a pressing member (not shown in the drawings) is provided in the main body of the electronic image forming apparatus.

As shown in fig. 1 to 3, the developing cartridge 10 includes a casing 1, a developer bearing member 2, a driving unit 3, and a conductive unit 4.

A developer accommodating portion for storing developer is provided in the casing 1, a first side wall 11 is provided on the left side of the casing 1 in the longitudinal direction (i.e., the left-right direction) of the casing 1, a second side wall 12 is provided on the right side of the casing 1, and the first side wall 11 and the second side wall 12 are disposed opposite to each other. The developer carrying member of the present embodiment is a developing roller 2, the developing roller 2 being rotatably supported on the casing 1 and located on the front side of the developing cartridge 10, the developing roller 2 facing the photosensitive drum in a state of being mounted in the drum cartridge to supply developer to the photosensitive drum.

The developing cartridge 10 has a first end 101 and a second end 102 opposite to the first end 101 in the axial direction of the developing roller 2, and the driving unit 3 is provided at the first end 101 of the developing cartridge 10 for coupling with a driving head of an electrophotographic apparatus to receive a driving force for driving rotation of the developing roller 2, the inside of the agitating member, the toner feeding roller, and the like.

In the present embodiment, the driving unit 3 includes an input portion 31, a developing roller gear 34, a powder feeding roller gear 32, and a first transition gear 33, the input portion 31 being rotatably mounted on the first side wall 11 of the casing 1 for receiving a driving force in association with a driving head of the electronic imaging device.

In the present embodiment, the developing roller gear 34 and the powder feeding roller gear 32 are connected to the developing roller 2 and the powder feeding roller, respectively, the input portion 31 is meshed with the first transition gear 33 without being meshed with the developing roller gear 34 and the powder feeding roller gear 32, the first transition gear 33 is meshed with the developing roller gear 34 and the powder feeding roller gear 32, and when the input portion 31 receives the driving force to rotate, the developing roller gear 34 and the powder feeding roller gear 32 are rotated by driving the first transition gear 33 by rotating the first transition gear 33.

The conductive unit 4 of the present embodiment is located at the second end 102 of the developing cartridge 10 for receiving power from the image forming apparatus and is capable of transmitting power to the rotating member such as the developing roller 2. Specifically, the conductive unit 4 is configured as a bearing member and is provided on the second side wall 12 of the casing 1, and the shaft portion of the developing roller 2 may be in contact with or supported on the bearing member so as to be able to receive electric power.

The bearing member 4 in this embodiment is further provided with a power receiving portion 41 protruding from the surface of the bearing member 4 and receiving power in contact with the image forming apparatus, and an abutment force receiving portion 42 for receiving an external force to bring the developing roller into contact with the photosensitive drum. In the present embodiment, the power receiving portion 41 and the contact force receiving portion 42 may be integrally formed, or may be provided separately.

In some embodiments, the abutment force receiving portion 42 is provided on the casing or the end cover, or may be provided on a member connected to the casing, as long as it is capable of receiving an external force so that the developing roller and the photosensitive drum are brought into contact.

The developing cartridge 10 further includes a first end cap 103 at the first end 101 of the casing 1, the first end cap 103 being mounted at the first side of the casing 1 to cover at least part of the driving unit 3.

The developing cartridge 10 is further provided with a chip unit provided at the first end, the chip unit including a chip holder 61 and a chip 62 mounted on the chip holder, the chip holder 61 being mountable on the housing or the first end cap 103. The location of the chip arrangement is only an example here, and the chip holder may be arranged at other locations of the developing cartridge.

The developing cartridge 10 is also provided with a separation mechanism 5, and the separation mechanism 5 may be provided in one or more.

Fig. 4 to 7 show a separation mechanism 5 of one of the structural forms, the separation mechanism 5 including a guide portion 6 and a separation member 7, wherein the guide portion 6 is for guiding the movement of the separation member 7, and the separation member 7 is for receiving an external force to move the developing roller 2 from a contact position in contact with the photosensitive drum to a separation position separated from the photosensitive drum.

The guide portion 6 has a first guide section 61 and a second guide section 62, wherein the second guide section 62 is located upstream of the first guide section 61 in the separation direction in which the developing roller 2 is separated from the photosensitive drum, and the first guide section 61 and the second guide section 62 are not located on the same straight line.

In the present embodiment, the second guide section 62 is provided closer to the front side of the housing 1 than the second guide section 62, the guide portion 6 is provided as a guide groove, the first guide section 61 is configured in a linear structure, the second guide section 62 is configured in an arc structure, and the first guide section 61 and the second guide section 62 are connected. In the present embodiment, the first guide section 61 extends entirely along a direction from the rear side of the developing cartridge 10 toward the front side of the developing cartridge 10, and the second guide section 62 extends curvedly from the tip of the first guide section 61.

In the present embodiment, the guide portion 6 is located at the first end of the developing cartridge 10, provided on the side of the first end cover 103.

The separation member 7 includes a first force receiving portion 71 for receiving a first external force to move the separation member 7, the first external force in this embodiment being a force of a pressing means (not shown in the drawings) of the electronic imaging device, a connecting portion 73 for connecting the first force receiving portion 71 and the second force receiving portion 72, and a second force receiving portion 72 receiving a second external force to force the developing roller 2 to move from the contact position to the separation position during movement of the separation member 7.

Specifically, the first force receiving portion 71 and the second force receiving portion 72 are slidably connected to the guide portion 6, specifically, the first force receiving portion 71 is embedded in the first guide section 61, and the second force receiving portion 72 is embedded in the second guide section 62 by being embedded in the guide portion 6. The connecting portion 73 connects the first stress portion 71 and the second stress portion 72, and is movably connected with the first stress portion 71 and the second stress portion 72, so that interference does not occur in the moving process of the second stress portion 72. The shape and structure of the first force receiving portion 71 and the second force receiving portion 72 may be set as needed, for example, cylindrical, square, or the like.

As shown in fig. 7, in the present embodiment, a pressing member (not shown) of the image forming apparatus applies a force to the rear of the first force receiving portion 71 in a direction parallel or intersecting the first direction, the first force receiving portion 71 moves in the guide portion 6 and pushes the second force receiving portion 72 to slide in the second guide section 62, the second force receiving portion 72 receives a reverse force of the blocking member 20 during movement of the arcuate second guide section 62, and the second force receiving portion 72 presses the guide portion 6 to move the developing cartridge 10 to the rear side, thereby moving the developing roller 2 away from the photosensitive drum, and separation of the developing roller 2 and the photosensitive drum is achieved.

The separating mechanism 5 is further provided with an elastic restoring piece 51 for restoring the separating member 7 to the initial position when the separating member 7 is not subjected to the first external force. Specifically, the elastic restoring piece 51 has one end connected to the first force receiving portion 71 and the other end connected to the housing 1, and is forced to be stretched when the separation member 7 is moved by the urging force of the urging means (not shown), and is elastically restored to return the separation member 7 to the original state when the separation member is not acted on by the urging means (not shown). Alternatively, the elastic restoring member 51 may be a compression spring or a torsion spring.

Fig. 8 to 11 show the separation mechanism 5 provided at the second end of the developing cartridge 10, which is substantially identical in shape and structure to the separation mechanism 5 provided at the first end, with the main difference that the separation mechanism 5 provided at the second end is provided on a fixing member 105 instead of the end cap, and the elastic restoring member 51 is a torsion spring.

In this embodiment, one or more separation mechanisms 5 may be provided, and the separation mechanism 5 may be provided on the end cap, the fixing member 105 connected to the case, or the case.

The separation mechanism 5 having the above-described structure is simple in structure, solves the problems that the development roller 2 is in contact with the photosensitive drum for a long time when not in operation, and causes pollution to the photosensitive drum, leading to shortened service life of the photosensitive drum and poor printing effect of the electronic imaging device, and can solve the problem that when the electronic imaging device having a color printing function is required to print only black-and-white images without printing color images, other development cartridges 10 except for the development cartridge 10 containing black developer are not required to be used, the development roller 2 in the development cartridges 10 is required to be moved towards a direction away from the photosensitive drum, so that the development roller 2 is separated from the photosensitive drum.

In some embodiments, the pushing means (not shown in the figures) does not apply a force directly to the separation member 7, but pushes the pushing means on the drum assembly (drum cartridge) first, and then the separation member 7 is pushed by the pushing means.

In some embodiments, the direction in which the biasing means (not shown) applies the biasing force to the separating member 7 is at an acute angle to the first direction.

In the present embodiment, the blocking member 20 may be a drum assembly (drum cartridge) frame, a member fixedly connected to the drum assembly frame, an end cap, a bead, or a frame or a side wall of the image forming apparatus, or the like, as long as it can abut against the second force receiving portion 72 and apply a reverse force to the second force receiving portion 72 so that the developing cartridge moves.

In some embodiments, the separation mechanism 5 is disposed between both ends of the developing cartridge 10.

Example 2

The development cartridge 10b of embodiment 2 is substantially identical to the development cartridge 10 of embodiment 1 in shape and structure, and the same parts are not described in detail, and the differences are mainly described below.

As shown in fig. 12 to 14, the separation member 7b receives a force in the left-right direction of the developing cartridge 10 b. The separation mechanism 5b is provided on the upper side of the developing cartridge 10b and at the end of the developing cartridge 10b, and the guide portion 6b has a first guide section 61b, a second guide section 62b, and a third guide section 63b, wherein the first guide section 61b extends along the longitudinal direction of the developing cartridge 10b and is located below the second guide section 62b, and the second guide section 62b extends along the longitudinal direction of the developing cartridge 10b and is located on the upstream side of the first guide section 61b in the separation direction of the developing roller 2 b. The third guide section 63b connects the first guide section 61b and the second guide section 62b, and the third guide section 63b is an inclined section.

The separation member 7b includes a first force receiving portion 71b, a second force receiving portion 72b, and a connecting portion 73b, at least a portion of the second force receiving portion 72b protruding further with respect to the first force receiving portion 71 b. The connecting portion 73b connects the first force receiving portion 71b and the second force receiving portion 72b, and at least a portion thereof is embedded in the guide portion 6b so that the separation member 7b can slide along the guide portion 6 b.

As shown in fig. 15 and 16, when the first force receiving portion 71b of the separation member 7b receives a force in the longitudinal direction of the developing cartridge 10b, the separation member 7b moves along the guide portion 6b in such a manner that the second force receiving portion 72b collides with the blocking member 20, the second force receiving portion 72b receives a force F2 in the direction of the blocking member 20, and the developing cartridge 10b is moved, and the developing roller 2b moves from the contact position to the separation position.

In some embodiments, two separation mechanisms 5b may be provided, and the two separation mechanisms 5b are provided at both ends of the developing cartridge 10b, respectively.

Example 3

The development cartridge 10c of embodiment 3 is substantially identical in shape and structure to the development cartridge 10 of embodiment 1, and the same parts are not described in detail, and the differences are mainly described below.

As shown in fig. 17, the separation member 7c receives a force in the front-rear direction of the developing cartridge 10c, which force has a direction parallel or at an acute angle to the first direction. The first guide section 61c and the second guide section 62c of the guide portion 6c extend in the front-rear direction of the developing cartridge 10 c.

Example 4

The development cartridge 10d of embodiment 4 is substantially identical in shape and structure to the development cartridge 10 of embodiment 1, and the same parts are not described in detail, and the differences are mainly described below.

As shown in fig. 18 and 19, the driving unit 3d includes an input portion 31d, a stirring member gear 35d, a first transition gear 33d, a second transition gear 36d, a powder feeding roller gear 32d, and a developing roller gear 34d, the input portion 31d receives driving force in engagement with the image forming apparatus, the input portion 31d is engaged with the stirring member gear 35d and the first transition gear 33d at the same time, the first transition gear 33d is engaged with the second transition gear 36d, and the second transition gear 36d is engaged with the powder feeding roller gear 32d and the developing roller gear 34 d. The transmission path of the rotation force is that the input part 31d drives the stirring member gear 35d to rotate and the first transition gear 33d to rotate, the first transition gear 33d drives the second transition gear 36d to rotate, and the second transition gear 36d drives the powder feeding roller gear 32d and the developing roller gear 34d to rotate. The stirring member gear 35d is connected to an end of the stirring member to drive the stirring member to rotate.

Specifically, the input portion 31d has a main body portion 311d and a gear portion 312d at one end, the gear portion 312d is a hollow gear, the circumferential outer surface of the gear portion has a first tooth portion 313d, the hollow portion of the gear portion 312d extends out of a driving shaft, and the circumferential surface of the driving shaft is provided with a second tooth portion 314d. The stirring member gear 35d has a hollow portion, and an inner circumferential surface of the hollow portion of the stirring member gear 35d is provided with a third tooth 351d that meshes with the second tooth 314d. The input portion 31d is meshed with the first transition gear 33d, the first transition gear 33d is meshed with the second transition gear 36d, and the second transition gear 36d is meshed with the powder feeding roller gear 32d and the developing roller gear 34d at the same time. When the input portion 31d receives the driving force to rotate, the input portion 31d drives the stirring member gear 35d and the first transition gear 33d to rotate, the first transition gear 33d drives the second transition gear 36d to rotate, and the second transition gear 36d drives the powder feeding roller gear 32d and the developing roller gear 34d to rotate.

In some embodiments, the input engages with teeth on the outside of the circumference of the stirring member gear for transmission of drive force, whether by the inner or outer circumferential gear, primarily depending on the direction of rotation of the input.

The driving unit 3d having the above-described structure can satisfy the rotation directions of different gear members, and has strong versatility. Further, the gear arrangement can be simplified, and miniaturization of the developing cartridge can be achieved.

Example 5

The development cartridge 10e of embodiment 5 is substantially identical in shape and structure to the development cartridge 10 of embodiment 1, and the same parts are not described in detail, and the differences are mainly described below.

As shown in fig. 20 and 21, the driving unit 3e includes an input portion 31e, a stirring member gear 35e, a first transition gear 33e, a second transition gear 36e, a third transition gear 37e, a powder feeding roller gear 32e, and a developing roller gear 34e, the input portion 31e being engaged with the image forming apparatus to receive driving force, the input portion 31e being engaged with the first transition gear 33e and the third transition gear 37e at the same time, the third transition gear 37e being engaged with the stirring member gear 35e, the first transition gear 33e being engaged with the second transition gear 36e, the second transition gear 36e being engaged with the powder feeding roller gear 32e and the developing roller gear 34e at the same time. The transmission path of the rotation force is that the input part 31e drives the first transition gear 33e and the third transition gear 37e to rotate, the third transition gear 37e drives the stirring member gear 35e to rotate, the first transition gear 33e drives the second transition gear 36e to rotate, and the second transition gear 36e drives the powder feeding roller gear 32e and the developing roller gear 34e to rotate.

The third transition gear 37e has a fifth tooth 371e and a sixth tooth 372e, the fifth tooth 371e is located outside the sixth tooth 372e, the fifth tooth 371e is meshed with the input 31e, and the sixth tooth 372e is meshed with the stirring member gear 35 e.

The driving unit 3e having the above-described structure can satisfy the rotation directions of different gear members, and has a high versatility.

In some embodiments, the stirring member gear receives the driving force through a developer roller gear, a powder feed roller gear, or a transition wheel engagement.

In some embodiments, the stirring member gear is provided at the second end of the developing cartridge to be rotated by receiving the driving force by meshing with a gear part provided at the second end of the developing cartridge, and such a gear part may be a gear provided at the second end of the developing roller or the second end of the powder feeding roller, or a separate rotating gear provided at the second end of the developing cartridge.

Finally, it should be noted that: the foregoing embodiments are only for illustrating the technical solution of the present utility model, but not for limiting the same, and the present utility model introduces terms such as "first", "second", etc. for convenience of distinguishing different components, where the terms such as "first", "second", etc. are not to be construed as limiting the number thereof, and the components such as "first", "second", etc. may be one or more according to the description of the present utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. A developing cartridge detachably mountable to an electronic image forming apparatus having a pressing member, comprising:

A housing having a developer accommodating portion;

a developing roller rotatably supported on the housing and movable between a contact position and a separation position;

a separation mechanism provided on the developing cartridge;

the separating mechanism is characterized by comprising:

A separation member including a first force receiving portion for receiving a first external force to move the separation member, a connecting portion for connecting the first force receiving portion and the second force receiving portion, and a second force receiving portion for receiving a second external force to force the developing roller to move from the contact position to the separation position in a process of moving the separation member;

and a guide portion, located at a first end of the developing cartridge, for guiding movement of the separation member.

2. A developing cartridge according to claim 1, wherein said developing cartridge is detachably mounted to a drum cartridge having a photosensitive drum, said developing roller facing said photosensitive drum; the direction of the first external force is parallel to the direction of the developing cartridge mounted to the drum cartridge or forms an acute angle with the direction of the developing cartridge mounted to the drum cartridge.

3. The developing cartridge according to claim 2, wherein the guide portion is provided on a side of the first end cap of the developing cartridge.

4. The developing cartridge according to claim 2, wherein the guide portion has a first guide section and a second guide section, wherein the second guide section is located upstream of the first guide section in a separation direction in which the developing roller is separated from the photosensitive drum, the first guide section and the second guide section not being located on the same straight line.

5. The developing cartridge according to claim 4, wherein the first guide section extends along a direction from a rear side of the developing cartridge toward a front side of the developing cartridge, and the second guide section extends curvedly from an end of the first guide section.

6. The developing cartridge according to claim 4, wherein the guide portion is provided as a guide groove, the first guide section is configured in a linear structure, the second guide section is configured in an arc structure, and the first guide section and the second guide section are connected.

7. A developing cartridge according to claim 2, wherein said separation mechanism is provided at an upper side of said developing cartridge.

8. The developing cartridge according to claim 7, wherein the guide portion has a first guide section, a second guide section, and a third guide section, wherein the first guide section and the second guide section extend in a front-rear direction of the developing cartridge, the first guide section is located below the second guide section, and the third guide section connects the first guide section and the second guide section.

9. A developing cartridge according to any one of claims 1 to 8, wherein said first force receiving portion and said second force receiving portion are slidably connected to said guide portion; the second external force is the reverse acting force of the blocking component received by the second stress part in the moving process.

10. A developing cartridge according to claim 9, wherein said separating mechanism is further provided with an elastic restoring member for restoring said separating member to an initial position when said separating member is not subjected to said first external force.