CN219302876U - Developing box - Google Patents

Abstract

The utility model discloses a developing box which can be detachably arranged on a photosensitive imaging unit, wherein the photosensitive imaging unit comprises a guide part and a forced pushing unit, and the developing box comprises a developing roller and a shell; the casing includes a first side portion located at one side in an axial direction, and a second side portion opposite to the first side portion, both of the first side portion and the second side portion being provided with a first protruding portion, the developing cartridge further including a second protruding portion; compared with the prior art, the utility model simplifies the structure of the developing box and reduces the manufacturing cost of the developing box.

Description

Developing box

Technical Field

The utility model relates to the technical field of electrophotographic imaging, in particular to a processing box.

Technical Field

The developing cartridge is a cartridge detachably mountable to a photosensitive image forming unit, and both are mountable together as an integral unit to an electrophotographic image forming apparatus, the developing cartridge including a member such as a developing roller, the photosensitive image forming unit including a member such as a charging roller, a photosensitive drum, and the like, and in particular, the electrophotographic image forming apparatus employing an electrophotographic image forming method is operated such that: the light emitted from the electrophotographic image forming apparatus is irradiated onto a photosensitive drum which has been uniformly charged by a charging roller, and selectively exposed to form an electrostatic latent image, which is then developed into a developer image by a developer covered on a developing roller, and the formed developer image is transferred onto a recording medium by a transfer machine, to finally form a visualized image on the recording medium.

In the prior art, there is disclosed a drum cartridge and a developing cartridge mounted in the drum cartridge, both of which are mountable together as one integral unit into the above-described electrophotographic image forming apparatus, wherein the photosensitive image forming unit includes a drum frame, a photosensitive image forming assembly, and a urging unit supported on the drum frame so as to be movable; the developing box comprises a developing roller capable of bearing developer, the photosensitive imaging component comprises a photosensitive drum capable of generating electrostatic latent images, and protruding parts which are respectively arranged at two ends of the length direction of the developing frame and protrude from the end walls of the two ends of the developing frame, when the developing box is arranged in the drum box, the protruding parts are clamped on the forced pushing unit and can receive the forced pushing force and the separation force generated by the forced pushing unit, so that the developing box can move between a contact position where the developing roller and the photosensitive drum are contacted with each other and a separation position where the developing roller and the photosensitive drum are separated from each other.

Above-mentioned developing cartridge is for realizing moving between the contact position that developing roller and sensitization drum contacted each other and the separation position of mutual separation, and developing cartridge's both sides all need outwards extend a plurality of protruding portions, and because protruding portion is outstanding in developing cartridge shell formation, in developing cartridge shell's production manufacturing process, the production degree of difficulty of developing cartridge shell can be improved to more complicated structure, and then improves developing cartridge's manufacturing cost.

Disclosure of Invention

Therefore, the present utility model provides a developing cartridge for solving the above technical problems, which is mainly implemented by the following technical solutions:

a developing cartridge detachably mountable to a photosensitive image forming unit including a guide portion and a urging unit applying a separating force to the developing cartridge, the developing cartridge including a developing roller rotatable about a developing roller axis extending in an axial direction, a developing roller for carrying a developer, and a casing extending in the axial direction and accommodating the developer; the housing includes a first side portion located at one side in an axial direction, and a second side portion opposite to the first side portion;

the first side part and the second side part are provided with first protruding parts which extend along the axial direction and are used for being matched with the guide parts; the developing cartridge further includes a second protrusion provided only on one of the first side portion or the second side portion, the second protrusion extending in the axial direction, the second protrusion for receiving the separating force from the urging unit.

Further, the second protruding part and the shell are of a split structure; the structure of the housing can be simplified and the manufacturing cost can be reduced.

Further, the second protrusion is connected to the first side of the housing via a power supply electrode provided on one side of the housing.

Further, the second protrusion is connected to the second side portion of the housing through a driving portion cover provided on one side of the housing.

Further, the first protruding part and the shell are of a split structure; the structure of the housing can be simplified and the manufacturing cost can be reduced.

Further, the first protrusion is connected to the first side of the housing through a power supply electrode provided on one side of the housing.

Further, the first protrusion is connected to the second side of the housing through a driving unit cover provided on one side of the housing.

Further, the first protrusion and the second protrusion are both columnar; the separation force from the pushing unit is conveniently received.

Further, the cross section of the second protruding part is circular; so that the second protrusion and the pushing unit move smoothly.

The beneficial effects are that:

in a plurality of schemes of the developing cartridge, through the arrangement of the first protruding part and the second protruding part, the mutual contact and separation between the developing roller and the photosensitive drum can be effectively realized; compared with the prior art, the structure of the shell of the developing box is simplified, and the manufacturing cost of the developing box is reduced.

Drawings

FIG. 1 is a schematic view of a developer cartridge of the present utility model ready for installation into a printer;

FIG. 2 is a schematic side sectional view of a drum cartridge;

fig. 3 is a perspective view of a developing cartridge according to an embodiment;

fig. 4 is a right side view of a developing cartridge of the first embodiment;

FIG. 5 is a partial right side view of the push unit in a standby position;

FIG. 6 is a partial right side view of the urging unit in an imaging position state of the embodiment;

FIG. 7 is a schematic view showing the positions of the developing cartridge and the photosensitive drum in a state of an image forming position according to an embodiment;

FIG. 8 is a partial right side view of the urging unit in a state of a separated position according to the embodiment;

FIG. 9 is a schematic view showing the positions of the developing cartridge and the photosensitive drum in a state of being separated from each other in the first embodiment;

fig. 10 is a right side perspective view of the developing cartridge of the second embodiment;

FIG. 11 is a partial left side view of the urging unit in the imaging position state of the embodiment;

FIG. 12 is a schematic view showing the positions of a developing cartridge and a photosensitive drum in a state of an image forming position according to an embodiment;

FIG. 13 is a partial left side view of the urging unit in the state of the separation position of the embodiment;

fig. 14 is a schematic view showing positions of the developing cartridge and the photosensitive drum in a state of separating the positions in the embodiment.

Detailed Description

In order to make the technical solution and the technical effects of the embodiments of the present utility model more clear, the technical solution of the process cartridge of the present utility model will be clearly and completely described below with reference to the accompanying drawings. It is apparent that the described embodiment is only one preferred embodiment of the present utility model, but not all embodiments, and that other embodiments, which are obtained by those skilled in the art without inventive effort, are within the scope of the present utility model based on the embodiments of the present utility model.

Embodiment one:

1. integral structure of color laser printer

For better description and understanding of the printer 10 and the developing cartridge 30 in the first embodiment of the present utility model, the first embodiment defines the respective directions of the printer 10 and the developing cartridge 30; as shown in fig. 1, the opening direction of the printer 10 is the front-rear direction, and the longitudinal direction of the developing cartridge 30 is the left-right direction, as indicated by the direction marked in the drawing; the up-down direction, the front-back direction and the left-right direction are all perpendicular.

As shown in fig. 1 and 2, the printer 10 includes a printer housing 11 and a drum cartridge 20 as a photosensitive imaging unit detachably mounted inside the printer housing 11; the drum cartridge 20 includes a frame 21 and a photosensitive imaging assembly 22, and four developing cartridges 30 detachably mounted inside the frame 21, the interiors of the four developing cartridges 30 are filled with toners of different colors as developers, the photosensitive imaging assembly 22 is connected to the rear lower side of the frame 21, and the photosensitive imaging assembly 22 corresponds to the number of developing cartridges 30.

The frame 21 is provided with a push unit 40 at a corresponding position on the left side of the developing cartridge 30; and both sides of the inside of the frame 21 are provided with guide grooves 50 at corresponding positions of both sides of the developing cartridge 30, and the second guide grooves 51 are provided at the bottom end rear side of the guide grooves 50.

The photosensitive imaging assembly 22 includes a photosensitive drum 221.

2. Forced pushing unit

As shown in fig. 5, the pushing unit 40 includes a clutch plate 41 and a pressing plate 42, wherein the clutch plate 41 and the pressing plate 42 are rotatably connected to the frame 21 by rotating shafts extending in the left-right direction of the inner wall of the frame 21, respectively, and a first elastic portion 411 for maintaining a fixed state is provided between the clutch plate 41 and the frame 21, and a second elastic portion 421 for maintaining a fixed state is provided between the pressing plate 42 and the frame 21; the clutch plate 41 is in a sector shape with two arc corners as round corners, and the rotating pivot is positioned at the center of the sector shape; the pressing plate 42 has a substantially inverted triangle shape, a rotation pivot is provided at a position with a center down, a horizontal portion 422 for receiving a pressing force (not shown) from the printer is provided at a top rear end of the pressing plate 42, and a separation portion 423 for driving the developing cartridge 30 to be separated from the photosensitive drum 221 is provided at a bottom side of the pressing plate 42.

3. Developing cartridge

The developing cartridges 30 are detachably mounted above the photosensitive drums 221, respectively, inside the frame 21, and specifically, the interiors of the four developing cartridges 30 are filled with toners of black, cyan, magenta, and yellow, respectively;

as shown in fig. 3 to 4, the developing cartridge 30 is provided with an electrode 60 and a driving portion 70 at both sides thereof, respectively, specifically, the electrode 60 is provided at the left side of the developing cartridge housing 31, the driving portion 70 is provided at the right side of the developing cartridge housing 31, and a cover 80 covering the driving portion 70 is provided at the right side of the driving portion 70.

The developing roller 32 penetrates the left and right sides of the developing cartridge housing 31; wherein the developing roller 32 penetrates to the right of the developing cartridge housing 31 to be engaged with the driving part 70 and receives a driving force from the driving part 70 so as to rotate with respect to the developing cartridge housing 31 inside the developing cartridge 30; the developing roller 32 is in contact with the electrode 60 through the left side of the cartridge housing 31, receiving bias electric charges from the electrode 60.

A columnar first protruding portion 90 extends in the axial direction at the position of the axis of the developing roller 32 below the left side of the electrode 60 and below the right side of the cover 80; a second protrusion 100 is provided above the left side of the electrode 60 in parallel with the first protrusion 90, where the second protrusion 100 has a circular vertical cross section.

4. Developing cartridge mounting

As shown in fig. 1, in order to mount the developing cartridge 30 to the printer housing 11 through the frame 21, a user grasps a handle portion of the developing cartridge 30 and inserts the developing cartridge 30 into the frame 21 from a corresponding position; as the developing cartridge 30 is inserted into the frame 21, the first protrusions 90 provided at both left and right sides of the developing cartridge 30 are also fitted into the guide grooves 50 provided at both inner sides of the frame 21; accordingly, the first protrusion 90 is guided by the guide groove 50, so that the developing cartridge 30 is inserted into the frame 21 in the direction of the guide groove 50; after the first protrusions 90 on both the left and right sides reach the lower end of the guide groove 50; the developing cartridge 30 is in the separated position, and the second projection 100 on the left side of the electrode 60 is in contact with the clutch plate 41 and the pressing plate 42 from above.

At this time, as shown in fig. 5, both the clutch plate 41 and the pressing plate 42 are in the standby position, and the distance between the rear side surface of the clutch plate 41 and the front side surface of the pressing plate 42 are smaller than the radial length of the second protrusion 100.

To mount the developing cartridge 30 in place, the user continues to push down the developing cartridge 30, and the second projection 100 pushes the clutch plate 41 and the pressing plate 42 to rotate relative to the frame 21 about the rotation pivot axis in a direction away from the second projection 100 by the pushing force, thereby increasing the distance between the rear side surface of the clutch plate 41 and the front side surface of the pressing plate 42 relative to each other, so that the second projection 100 can enter the space between the clutch plate 41 and the pressing plate 42 under the left and right of the pushing force.

When the second protrusion 100 enters the space between the clutch plate 41 and the pressing plate 42, the clutch plate 41 contacts the second protrusion 100 from above, and the clutch plate 41 presses the second protrusion 100 toward the rear lower side due to the first elastic portion 411; the second projection 100 of the developing cartridge 30 is pressed rearward and downward by the clutch plate 41, while the first projection 90 is simultaneously guided by the second guide groove 51, so that the developing cartridge 30 is brought into pressure contact with the corresponding photosensitive drum 221 in the direction of the second guide groove 51.

Accordingly, as shown in fig. 6 to 7, the developing cartridge 30 is moved from the standby position to the image forming position, and the developing roller 32 is brought into pressure contact with the photosensitive drum 221 by the pressing of the second projection portion 100 by the clutch plate 41, so that the developing cartridge 30 is completely mounted on the frame 21.

5. Developing cartridge contact/separation with photosensitive drum

When the printer 10 stops operating or the image forming operation of the printer 10 does not require participation of a certain developing cartridge 30 (the color printer performs switching between the monochrome mode and the color mode), the printer 10 realizes the above-described function by controlling the mutual contact and separation between the developing cartridge 30 and the photosensitive drum 221 in the present embodiment; to achieve separation of the developing cartridge 30 from the photosensitive drum 221, a pressing force unit (not shown) provided above the inside of the printer 10 presses the horizontal portion 422 of the pressing plate 42 downward.

As shown in fig. 8, the pressing plate 42 is rotated counterclockwise in the drawing with respect to the frame 21 by the pressing force; then, the separation portion 423 of the pressing plate 42 is pivoted forward and upward (see labeled in fig. 8), thereby applying a forward and upward separation force to the second protrusion 100; at this time, the second projection 100 is pushed obliquely upward and forward by the pressing plate 42, and at the same time, the first projections 90 on both sides of the developing cartridge 30 slide upward and forward along the second guide grooves 51 under the guidance of the corresponding second guide grooves 51, and therefore, the left side of the developing cartridge 30 is pushed upward and forward, so that the developing cartridge 30 is moved obliquely upward and leftward, and the developing roller 32 and the photosensitive drum 221 are separated from each other. As shown in fig. 8 to 9, the developing cartridge 30 is in the separation position, thereby achieving the mutual separation of the developing roller 32 and the photosensitive drum 221.

In order to bring the developing cartridge 30 separated from the photosensitive drum 221 into contact with the photosensitive drum 221 again, the pressing plate 42 is returned to the holding state by the second elastic portion 421 by releasing the pressing of the horizontal portion 422 of the pressing plate 42; as shown in fig. 6 to 7, the second projection 100 is pressed again by the clutch plate 41, so that the first projection 90 is guided by the second guide groove 51, and the developing cartridge 30 slides backward and downward again along the second guide groove 51 and contacts the photosensitive drum 221, at this time, at the image forming position.

Embodiment two:

next, a second embodiment of the present utility model will be described in detail with reference to fig. 10 to 14, and provides a developing cartridge, which is different from the first embodiment in that the second protrusion 100 of the developing cartridge 30 for separating the developing roller 32 and the photosensitive drum 221 is provided differently, in that the process cartridge of the present embodiment is the same as the process cartridge of the first embodiment described above.

Specifically, as shown in fig. 10, a second protrusion 100 parallel to the first protrusion 90 is provided above the right side of the cover 80; and the frame 21 is provided with a push unit 40 (see fig. 1) in cooperation with a corresponding position on the right side of each developing cartridge 30;

as shown in fig. 13, when a pressing force unit (not shown) provided above the inside of the printer 10 presses down the horizontal portion 422 of the pressing plate 42, the pressing plate 42 rotates clockwise in fig. 13 with respect to the frame 21 by the pressing force; then, the separation portion 423 of the pressing plate 42 is pivoted forward and upward (indicated in the drawing), thereby applying a forward and upward separation force to the second protrusion 100; at this time, the second protrusion 100 is pressed forward and upward by the pressing plate 42; at the same time, the first protrusions 90 on both sides of the developing cartridge 30 slide forward and upward along the second guide grooves 51 under the guidance of the corresponding second guide grooves 51, and therefore, the right side of the developing cartridge 30 is pushed forward and upward, so that the developing cartridge 30 is moved rightward and upward, and the developing roller 32 and the photosensitive drum 221 are separated from each other. As shown in fig. 13 to 14, the developing cartridge 30 is at the separation position at this time, so that the developing roller 32 and the photosensitive drum 221 are separated from each other.

In order to bring the developing cartridge 30 separated from the photosensitive drum 221 into contact with the photosensitive drum 221 again, the pressing plate 42 is returned to the holding state by the second elastic portion 421 by releasing the pressing of the horizontal portion 422 of the pressing plate 42; as shown in fig. 11 to 12, the second projection 100 is pressed again by the clutch plate 41, so that the first projection 90 is guided by the second guide groove 51, and the developing cartridge 30 slides backward and downward again along the second guide groove 51 and contacts the photosensitive drum 221, at this time, at the image forming position.

Function and beneficial effect:

in the aspects of the developing cartridge of the present utility model, the mutual separation and contact between the developing roller 32 and the photosensitive drum 221 can be effectively achieved by the arrangement of the first and second protrusions 90 and 100; the structure of the developing cartridge housing 31 is simplified and the manufacturing cost of the developing cartridge 30 is reduced as compared with the prior art.

The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; 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 technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (9)

1. A developing cartridge detachably mountable to a photosensitive imaging unit including a guide portion and a urging unit that applies a separating force to the developing cartridge, the developing cartridge comprising:

a developing roller rotatable about a developing roller axis extending in an axial direction for carrying a developer;

a housing extending in an axial direction and accommodating a developer;

the housing includes a first side portion located at one side in an axial direction, and a second side portion opposite to the first side portion;

the method is characterized in that:

the first side part and the second side part are provided with first protruding parts which extend along the axial direction and are used for being matched with the guide parts;

and a second protrusion provided at only one of the first side portion or the second side portion, the second protrusion extending in an axial direction, the second protrusion for receiving a separation force from the urging unit.

2. The developing cartridge according to claim 1, wherein: the second protruding part and the shell are of a split type structure.

3. The developing cartridge according to claim 2, wherein: the second protrusion is connected to the first side of the housing via a power supply electrode provided on one side of the housing.

4. The developing cartridge according to claim 2, wherein: the second protrusion is connected to the second side of the housing through a driving part cover provided on one side of the housing.

5. The developing cartridge according to claim 1, wherein: the first protruding part and the shell are of a split type structure.

6. The developing cartridge according to claim 5, wherein: the first protrusion is connected to a first side portion of the housing via a power supply electrode provided on one side of the housing.

7. The developing cartridge according to claim 5, wherein: the first protrusion is connected to the second side of the housing through a driving part cover provided on one side of the housing.

8. The developing cartridge according to claim 1, wherein: the first protrusion and the second protrusion are both columnar.

9. The developing cartridge according to claim 8, wherein: the second protruding portion has a circular cross section.

Images