CN214846245U

CN214846245U - Developing cartridge and process cartridge

Info

Publication number: CN214846245U
Application number: CN202121312506.8U
Authority: CN
Inventors: 范文燚; 黄云欣; 张玉萍
Original assignee: Zhuhai Dinglong Huitong Printing Technology Co ltd
Current assignee: Zhuhai Dinglong Huitong Printing Technology Co ltd
Priority date: 2021-06-11
Filing date: 2021-06-11
Publication date: 2021-11-23
Anticipated expiration: 2031-06-11

Abstract

The utility model relates to a developing box and processing box. Wherein the developing cartridge includes a developing housing and a developing roller rotatably supported at both opposite end portions of the developing housing; a storage bin and a developing bin are arranged in the developing shell, a separation film is arranged between the storage bin and the developing bin, a diaphragm groove is arranged on the side wall of the end part of the developing shell, and the separation film penetrates through the diaphragm groove and extends out of the developing box; a sealing plug is arranged in the diaphragm groove, one side face of the sealing plug presses the separation film penetrating through the diaphragm groove, and a pressing portion used for pressing the sealing plug is arranged on the side wall of the end portion. The utility model discloses in, press the deformation of splenium can restrain the sealing plug when tearing from the diaphragm, reduce or avoid the developer to reveal from the diaphragm tank.

Description

Developing cartridge and process cartridge

Technical Field

The utility model relates to a develop the cartridge and reach including this process cartridge that develops the cartridge for the electrophotographic image forming apparatus.

Background

The developing cartridge is generally mounted in an electrophotographic image forming apparatus such as a laser printer, either alone or after forming a process cartridge with a photosensitive drum cartridge, for supplying a developer to the photosensitive drum to develop an electrostatic latent image on the photosensitive drum. The developing box is provided with a storage bin and a developing bin which are communicated with each other, and when the developing box works, the developer stored in the storage bin is conveyed into the developing bin and is supplied to the photosensitive drum by the developing roller.

Before the developing cartridge is installed and used, a storage bin and a developing bin are usually separated by a separation film so as to realize sealed storage of the developer; when the developing box is used, the separation film needs to be torn off, so that the developer in the storage bin can participate in developing. Generally, a diaphragm groove through which the separation film passes to the outside of the developing cartridge is provided on an end side wall of the developing cartridge to facilitate the user to tear the separation film off.

Conventionally, in order to prevent the developer from leaking from the diaphragm casing, an elastic sealing plug is generally used to seal the diaphragm casing. The sealing structure can realize better sealing effect under static condition, but has the defect of poor sealing effect under the dynamic condition of tearing off the separating membrane.

Specifically, on the one hand, the elastic sealing plug is deformed when the separation membrane is torn off, and a gap is formed between the membrane groove and the sealing plug; on the other hand, the developing chamber is in a sealed state before the separation film is torn away, and the internal pressure of the developing chamber is greater than the external air pressure. Therefore, when the separating membrane is torn off, the developer is easy to be sprayed out from the gap between the membrane groove and the sealing plug under the action of pressure, and the problem of powder spraying is caused.

Disclosure of Invention

The utility model aims at providing a can reduce or avoid tearing the developing box that the developer was revealed when separating the diaphragm.

Another object of the present invention is to provide a process cartridge including the above developing cartridge.

In order to achieve the above-mentioned primary object, the present invention provides a developing cartridge including a developing casing and a developing roller rotatably supported at both opposite end portions of the developing casing; a storage bin and a developing bin are arranged in the developing shell, a separation film is arranged between the storage bin and the developing bin, a diaphragm groove is arranged on the side wall of the end part of the developing shell, and the separation film penetrates through the diaphragm groove and extends out of the developing box; wherein, be equipped with the sealing plug in the diaphragm groove, a side of sealing plug compresses tightly the divider film that passes the diaphragm groove, is equipped with the splenium that is used for pressing the sealing plug on the tip lateral wall.

Among the above-mentioned technical scheme, utilize pressing the portion to press the sealing plug, can restrain the deformation of sealing plug when tearing from the barrier film to reduce or avoid developer to reveal from the diaphragm tank.

According to the utility model discloses a concrete implementation mode is equipped with the partition wall between storage storehouse and the development storehouse, is formed with the opening of intercommunication storage storehouse and development storehouse on the partition wall, and the parting film sets up on the partition wall to sealed opening.

According to a specific embodiment of the utility model, the side that the sealing plug compressed tightly the divider membrane is provided with the clean portion of developer, and the clean portion of developer is used for cleaing away the developer that adheres to on the divider membrane surface when tearing off the divider membrane.

More specifically, the developer cleaning portion includes one or more ribs provided on the side of the sealing plug, the ribs extending in the width direction of the separation film. The ribs may extend linearly or non-linearly, and the extending direction of the ribs may be parallel to the width direction of the separation film or may be at an angle.

According to the utility model discloses a concrete implementation mode, the sealing plug has the fretwork portion that is latticed distribution for the side of parting film, both can play sealed effect like this, also is convenient for impress the sealing plug in the diaphragm groove.

According to a specific embodiment of the present invention, the pressing portion is configured to press at least the developer cleaning portion. When the partition film is torn off, the deformation of the sealing plug is mainly generated in the developer cleaning part, so that at least the developer cleaning part is pressed by the pressing part, the deformation of the developer cleaning part can be well inhibited, and the developer is more reliably prevented from leaking from the diaphragm groove when the partition film is torn off.

According to a specific embodiment of the utility model, be equipped with the support that is used for supporting the developer roll on the tip lateral wall of development casing, press the splenium to form on this support to simplify the structure and the equipment of developing box.

More specifically, the inside of the holder is formed with a waste toner accommodating recess facing the diaphragm tank. Thus, even if the developer leaks from the diaphragm groove, the developer is stored in the waste toner accommodating recess and does not leak to the outside of the developing cartridge to cause contamination.

More specifically, the holder has a conductive property and is provided with a power receiving portion; the developing roller is electrically connected to the bracket. Thus, the developing roller can receive power from the electrophotographic image forming apparatus through the bracket, which is more advantageous to simplify the structure of the developing cartridge.

Further, the bracket can also be used for supporting and electrically connecting the powder feeding roller.

In order to achieve the above another object, the present invention also provides a process cartridge including the photosensitive drum cartridge and any one of the developing cartridges as described above.

To more clearly illustrate the objects, technical solutions and advantages of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.

Drawings

FIG. 1 is a perspective view of a developing cartridge according to an embodiment of the present invention;

fig. 2 is a transverse sectional view of an embodiment of the developing cartridge of the present invention;

fig. 3 is an exploded view of the embodiment of the developing cartridge of the present invention;

FIG. 4 is a perspective view of the bracket according to the embodiment of the present invention;

FIG. 5 is a longitudinal cross-sectional view of an embodiment of the developing cartridge of the present invention, the cross-sectional plane of which passes through the rotational axis of the developing roller and is perpendicular to the length direction of the diaphragm tank;

fig. 6a is a first perspective view of the sealing plug according to the embodiment of the present invention;

fig. 6b is a second perspective view of the sealing plug according to the embodiment of the present invention.

Detailed Description

As shown in fig. 1 and 2, the developing cartridge of the embodiment includes a developing casing 10 and a developing roller 21, and the developing roller 21 rotatably develops both opposite end portions of the casing 10. The developing casing 10 has a storage bin 101 and a developing bin 102 therein, and a separation film 30 is provided between the storage bin 101 and the developing bin 102. Specifically, a partition wall 11 is provided between the storage hopper 101 and the developing hopper 102, an opening 111 communicating the storage hopper 101 and the developing hopper 102 is formed in the partition wall 11, and the partition film 30 is provided (e.g., thermally welded) on the partition wall 11 and seals the opening 111.

The storage hopper 101 is used to store developer. Before the use of the developing cartridge, the separation film 30 maintains the seal to the opening 111, thereby hermetically storing the developer in the storage bin 101. After the separation film 30 is torn off, the developer stored in the storage bin 101 may be transported into the developing bin 102 by an agitating frame or a powder feeding member (not shown in the figure) provided in the storage bin 101, and then supplied onto the developing roller 21 by the powder feeding roller 22 provided in the developing bin 102 to participate in development.

As shown in fig. 3 and 5, the sidewall 12 of the developing casing 10 is provided with a diaphragm groove 121 penetrating the sidewall 12, and the separation film 30 has a tearing end 31 penetrating from the diaphragm groove 121 to the outside of the developing casing 10, so that the separation film 30 can be torn off when being mounted and used. A sealing plug 14 is provided in the diaphragm groove 121, and the sealing plug 14 has a first side 14a contacting and pressing the separation membrane 30 and a second side 14b opposite to the separation membrane 30.

The first side surface 14a of the sealing plug 14 is provided with a developer cleaning portion, and when the separation film 30 is torn off, the developer cleaning portion is in contact with the surface of the separation film 30 facing the developing chamber 101 to remove the developer attached to the surface of the separation film. In one embodiment, as shown in fig. 6a, the developer cleaning portion includes one or more ribs 141 disposed on the first side surface 14a, the ribs 141 extending linearly in the width direction of the separation film 30 and parallel to the width direction of the separation film 30, and the ribs 141 may function as "scrapers" for scraping off the developer attached to the surface of the separation film 30. In other embodiments, the ribs 141 may be angled with respect to the width direction of the separation film 30, or may extend non-linearly (e.g., in a wave shape).

As shown in fig. 6b, the second side 14b of the sealing plug 14 has a grid-shaped hollow 142. Thus, the second side 14b may function both as a good seal and also deform accordingly when the sealing plug 14 is pressed into the diaphragm groove 121, thereby facilitating the installation of the sealing plug 14.

Further, the side wall 12 is provided with a pressing portion that presses the seal plug 14, and the pressing portion is preferably provided to press at least the developer cleaning portion. In one embodiment, as shown in fig. 3 and 4, the bracket 13 is mounted on the sidewall 12, and the bracket 13 is provided with a pressing portion 131 for pressing the sealing plug 14, and the pressing portion 131 can be integrally formed with the bracket 13 to form a part of the bracket 13. Here, the pressing portion 131 may be provided to press only the developer cleaning portion, or may be provided to press the entire outer end surface of the sealing plug 14.

Pressing the sealing plug 14, particularly the developer cleaning portion, by the pressing portion 131 can suppress deformation of the sealing plug 14, particularly the developer cleaning portion, when the separation film 30 is torn off, thereby reducing or preventing leakage of the developer from the diaphragm tank 121. Further, as shown in fig. 4, the inside of the holder 13 is formed with a waste toner accommodating recess 132 facing the diaphragm groove 121, so that, even if a situation occurs in which the developer leaks from the diaphragm groove 121, the leaked developer is stored in the waste toner accommodating recess 132 and does not leak to the outside of the developing cartridge to cause contamination.

The holder 13 may be used to support the developing roller 21 and the powder feeding roller 22. As shown in fig. 3 and 4, the bracket 13 has a first shaft hole 133 and a second shaft hole 134, the rotating shaft 211 of the developing roller 21 is rotatably connected to the first shaft hole 133, and the rotating shaft 221 of the powder feeding roller 22 is rotatably connected to the second shaft hole 134, so that the bracket 13 rotatably supports the developing roller 21 and the powder feeding roller 22.

Further, the holder 13 may have a conductive property and be electrically connected to the developing roller 21 and the powder feeding roller 22. As shown in fig. 3, the holder 13 has a power receiving portion 135 in a convex shape, and the power receiving portion 135 is electrically connected to the electrophotographic image forming apparatus, thereby enabling the electrophotographic image forming apparatus to supply power to the developing roller 21 and the powder feed roller 22.

The utility model discloses the development box can install to electrophotographic image forming apparatus alone, also can form installation to electrophotographic image forming apparatus after handling the box with sensitization drum box combination together. The structure of the photosensitive drum box and the combination mode of the photosensitive drum box and the developing box can be the same as the prior art, and the description is omitted.

Although the present invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto. Any person skilled in the art can make some changes or substitutions without departing from the scope of the invention, i.e. all equivalent changes made according to the invention should be covered by the protection scope of the invention.

Claims

1. A developing cartridge includes a developing casing and a developing roller rotatably supported at both opposite ends of the developing casing; the developing box is characterized in that a storage bin and a developing bin are arranged in the developing shell, a separation film is arranged between the storage bin and the developing bin, a diaphragm groove is formed in the side wall of the end part of the developing shell, and the separation film penetrates through the diaphragm groove and extends out of the developing box; the method is characterized in that: the diaphragm groove is internally provided with a sealing plug, one side surface of the sealing plug presses the separation membrane passing through the diaphragm groove, and the side wall of the end part is provided with a pressing part for pressing the sealing plug.

2. A developing cartridge according to claim 1, wherein: a partition wall is arranged between the storage bin and the developing bin, an opening part for communicating the storage bin with the developing bin is formed in the partition wall, and the partition film is arranged on the partition wall and seals the opening part.

3. A developing cartridge according to claim 1, wherein: and a developer cleaning part is arranged on the side surface of the sealing plug, which is tightly pressed against the separation film, and is used for removing the developer attached to the surface of the separation film when the separation film is torn off.

4. A developing cartridge according to claim 3, wherein: the developer cleaning portion includes one or more ribs provided on a side surface of the sealing plug, the ribs extending in a width direction of the separation film.

5. A developing cartridge according to claim 1, wherein: and one side of the sealing plug, which is opposite to the separation membrane, is provided with hollow parts which are distributed in a grid shape.

6. A developing cartridge according to claim 3, wherein: the pressing portion is configured to press at least the developer cleaning portion.

7. A developing cartridge according to claim 1, wherein: the developing roller is characterized in that a support used for supporting the developing roller is arranged on the side wall of the end portion, and the pressing portion is formed on the support.

8. A developing cartridge according to claim 7, wherein: the holder is formed at an inner side thereof with a waste powder containing recess facing the diaphragm tank.

9. A developing cartridge according to claim 7, wherein: the bracket has a conductive characteristic and is provided with a power receiving part; and the developing roller and the bracket form an electric connection.

10. A developing cartridge according to claim 9, wherein: the bracket is also used for supporting and electrically connecting the powder feeding roller.

11. A process cartridge includes a developing cartridge and a photosensitive drum cartridge; the method is characterized in that: the developing cartridge according to any one of claims 1 to 10.