CN219676446U - Powder-adding cover assembly, developing box, processing box and electronic photographic imaging equipment - Google Patents

Abstract

The utility model provides a powder adding cover assembly, a developing box, a processing box and an electrophotographic imaging device, wherein the powder adding cover assembly comprises an inner cover and an outer cover, the inner cover is provided with a mounting hole and a first through hole, an opening of the mounting hole is formed on a first end of the inner cover, the first through hole is formed on a second end of the inner cover, the first through hole penetrates through the inner cover along the axial direction of the mounting hole and is communicated with the mounting hole, the first aperture of the first through hole is smaller than the second aperture of the mounting hole, the outer cover is provided with a first plug part, the first plug part is detachably mounted in the mounting hole, and the peripheral wall of the first plug part is adjacent to the inner hole wall of the mounting hole. The developing box comprises the rear powder adding cover assembly, the processing box comprises the developing box, the processing box is arranged in the electronic photographic imaging equipment, the rear powder adding cover assembly can prevent carbon powder from leaking out of a powder bin of the developing box in the powder adding process, and a powder adding nozzle of a carbon powder bottle is convenient to clean.

Description

Powder-adding cover assembly, developing box, processing box and electronic photographic imaging equipment

Technical Field

The present utility model relates to the field of electrophotographic image forming technology, and more particularly, to a powder cap assembly, a developing cartridge provided with the powder cap assembly, a process cartridge including the developing cartridge, and an electrophotographic image forming apparatus mounted with the process cartridge.

Background

An electrophotographic image forming apparatus (e.g., a laser printer) is an apparatus that forms an image on an image forming medium (e.g., paper) by using electrophotographic principles through at least the processes of charging, exposing, developing, transferring, fixing, and cleaning, and a material device of a printing consumable used on the electrophotographic image forming apparatus is generally called a process cartridge.

The existing process cartridge generally comprises a drum cartridge and a developing cartridge, wherein the developing cartridge comprises parts such as a developing frame and a powder adding port cover, the developing frame is provided with a powder bin, the developing frame is provided with a powder adding port, the powder adding port is communicated with the powder bin, and the powder adding port cover is used for sealing the powder adding port so as to prevent carbon powder from being discharged out of the powder bin from the powder adding port. When the residual amount of the carbon powder in the powder bin is insufficient, a user can take the powder adding cover out of the powder adding port, and then the carbon powder can be supplemented into the powder bin through the powder adding port, so that the processing box can be used continuously. However, the existing developing cartridge has the following disadvantages due to the single function and structure of the powder filling cover:

when adopting the carbon powder bottle to add the carbon powder to developing box, in order to prevent to add the in-process carbon powder and take place to leak, can stretch into the powder storehouse with the powder mouth that adds of carbon powder bottle in general, but because add the in-process carbon powder to developing box, the air in the carbon powder bottle also can flow out with the carbon powder together and add the powder mouth, and because the cross-sectional area who adds the powder mouth is usually the cross-sectional area that is less than the powder chamber of carbon powder bottle for the velocity of flow of the air current that flows through adding the powder mouth department can increase, and the carbon powder has more tiny, consequently the carbon powder is held up by the air current easily and mixes into the air and become fly ash. In addition, after the carbon powder enters the powder bin along with the air in the carbon powder bottle, the carbon powder and the air flowing out of the powder adding nozzle collide with the bin wall of the powder bin, so that the content of the carbon powder in the air is increased, and the air overflows out of the powder bin from a gap between the powder adding nozzle and the powder adding nozzle, so that the carbon powder mixed in the air can be discharged out of the powder bin along with the air flow formed by the air, the carbon powder mixed in the air pollutes the environment around an operator and a developing box, and meanwhile, when the operator sucks part of the air, the health of the operator can be influenced. In addition, because part of carbon powder mixed in the air and/or part of carbon powder lifted by air flow in the powder adding process can be adsorbed on the outer surface of the powder adding nozzle, an operator also needs to clean the outer surface of the powder adding nozzle after the powder adding process is finished, so that the surrounding environment is not polluted, the tedious degree of the powder adding operation of the operator is increased, and the operator is also easily polluted by the carbon powder again in the process of wiping the powder adding nozzle.

Disclosure of Invention

In order to solve the above problems, a first object of the present utility model is to provide a toner hopper cap assembly that can prevent toner from leaking out of a toner hopper of a developing cartridge during a toner feeding process and facilitate cleaning of a toner feeding nozzle of a toner bottle.

A second object of the present utility model is to provide a developing cartridge provided with the above-described powder charging port cover assembly.

A third object of the present utility model is to provide a process cartridge provided with the above-described developing cartridge.

A fourth object of the present utility model is to provide an electrophotographic image forming apparatus provided with the above process cartridge.

In order to achieve the first object of the present utility model, there is provided a powder-adding cap assembly, comprising an inner cap having a mounting hole and a first through hole, an opening of the mounting hole being formed at a first end of the inner cap, the first through hole being formed at a second end of the inner cap, the first through hole penetrating the inner cap in an axial direction of the mounting hole and communicating with the mounting hole, a first aperture of the first through hole being smaller than a second aperture of the mounting hole, and an outer cap having a first plug portion detachably mounted in the mounting hole, an outer peripheral wall of the first plug portion being adjacent to an inner hole wall of the mounting hole.

Therefore, through the structural design of the powder adding cover assembly, when the carbon powder is required to be added into the powder bin of the developing box, the outer cover is firstly detached from the inner cover, then the powder adding mouth of the carbon powder bottle is inserted into the first through hole, and the peripheral wall of the powder adding mouth is attached to the hole wall of the first through hole, so that when the bottle body of the carbon powder bottle is extruded, the carbon powder and air in the carbon powder bottle enter the powder bin, and then the carbon powder in the powder bin is blocked in the powder bin by the hole wall of the first through hole and the peripheral wall of the powder adding mouth when flowing to the first through hole along with the air, so that the carbon powder is prevented from leaking out from a gap between the first through hole and the powder adding mouth, the periphery of the developing box, the hands of an operator and the like are prevented from being polluted, the operator is prevented from sucking the carbon powder, and the health of the operator is prevented from being harmed.

In a preferred embodiment, a first inward flange is formed between the first through hole and the body of the inner cover, and the first inward flange is elastically deformable; the first inner flanging is made of silica gel, thermoplastic elastomer, polyvinyl chloride or rubber; the first inner flange is integrally formed with the body of the inner cap.

From the above, the design makes the first through-hole can hold the bigger powder mouth that adds of self aperture, and when adding the powder mouth and inserting in first through-hole, first through-hole can carry out interference fit with adding the powder mouth better, thereby better prevent that the carbon dust from adding the clearance between powder mouth and the first through-hole from leaking out the powder storehouse, furthermore, the above-mentioned design still makes when adding the powder mouth and withdraw from the in-process of first through-hole, the aperture of first through-hole can become gradually smaller until resume initial aperture along with adding the withdrawal of powder mouth, and in this process, first internal flange can play the effect of scraping the perisporium of adding the powder mouth, thereby will adsorb in adding the powder mouth from adding the powder mouth on the perisporium of powder mouth, in order to reach the effect of clean adding the powder mouth, make the operator after accomplishing the carbon dust to add the developing box, the work load of operator is reduced, promote operator's experience.

In another preferred embodiment, the powder-adding cover assembly further includes a sealing member mounted in the mounting hole, the sealing member having an opening communicating the first through hole and the mounting hole; the opening is a second through hole, the second through hole penetrates through the sealing element along the axial direction, the third aperture of the second through hole is smaller than or equal to the first aperture, or the opening is star-shaped, in the axial direction, the projection of the opening is positioned in the projection of the first through hole, or the opening is a cross-shaped opening, and the sealing element can be elastically deformed.

From the above, because the sealing member has certain elastic deformation ability, the opening on the sealing member can hold the powder adding mouth that is bigger than the opening size of self, when the powder adding mouth passes the opening and inserts in the first through-hole, the opening can carry out interference fit with the powder adding mouth better, thereby better prevent the toner from discharging the powder storehouse from the clearance between first through-hole and the powder adding mouth and/or the clearance between opening and the powder adding mouth, furthermore, the design still makes when the powder adding mouth withdraws from the in-process of first through-hole, the opening size of opening can become gradually diminish along with the withdrawal of powder adding mouth until restoring the initial state, and in this process, this opening can play the effect of scraping the peripheral wall of powder adding mouth, thereby scrape into the powder storehouse from the powder adding mouth with adsorbing on the peripheral wall of powder adding mouth, so as to reach the effect of clean powder adding mouth, make the operator need not to clean the operator after accomplishing the interpolation to developing box, again clean the powder adding mouth, reduce operator's work load, promote operator's experience.

The further proposal is that a second inward flanging is formed between the first through hole and the body of the inner cover; the seal may be made of sponge, silicone or rubber; the sealing element is fixedly adhered to the second inner flanging or a clamping part is arranged in the mounting hole, a clamping position is formed between the clamping part and the second inner flanging, and the sealing element is arranged in the clamping position.

From the above, the sealing element can be arranged in the inner cover in a bonding and fixing mode, so that the connection firmness of the inner cover of the sealing element is improved, and the toner is better prevented from leaking out of the developing box; the sealing element can also be installed in the inner cover in a clamping connection mode, so that when the sealing element is aged, hot cracked and other problems occur, the sealing ring can be replaced more conveniently, and the service life of the powder adding port cover assembly is prolonged.

Still further, when the mounting hole is provided with the engagement portion, the following is: the clamping part comprises a plurality of clamping hooks which are distributed on the second inner flanging along the circumferential direction of the first through hole, and clamping positions are formed between the clamping parts of the clamping hooks and the second inner flanging; or the clamping part comprises a plurality of first protruding blocks, the first protruding blocks are distributed on the inner hole wall along the circumferential direction of the mounting hole, and clamping positions are formed between one surface of the first protruding block facing the second inner flanging and the second inner flanging.

From the above, the structure of the clamping part can be changed according to the requirements of the structure, the connection mode and the like of the inner cover and the outer cover, so that the powder adding cover assembly can have good adaptability, the application range of the powder adding cover assembly is improved, and meanwhile, the fixing effect of the clamping part on the sealing ring and the effect of the sealing ring for preventing carbon powder from leaking out of the developing box can be ensured.

When the first plug part is installed in the installation hole, one first lug is connected in one second clamping groove in a clamping way, and one second lug is connected in one first clamping groove in a clamping way; when the sealing element is adhered and fixed on the second inner turnup or when the clamping part comprises a plurality of clamping hooks, the inner hole wall is provided with a first anti-slip part in a molding mode, the outer peripheral wall is provided with a second anti-slip part in a molding mode, and when the first plug part is installed in the installation hole, the first anti-slip part is connected with the second anti-slip part in a matching mode.

From the above, when the engaging portion is a plurality of first protruding blocks, the connection firmness between the inner cover and the outer cover can be further improved by additionally arranging the second protruding blocks on the first plug portion; when the sealing element is adhered and fixed on the second inner turnup or when the clamping part comprises a plurality of clamping hooks, the firmness of connection between the inner cover and the outer cover can be further improved by additionally arranging the first anti-slip part on the inner hole wall and the second anti-slip part on the first plug part.

The powder adding cover assembly further comprises a connecting belt, wherein the connecting belt is respectively connected with the inner cover and the outer cover, and the inner cover, the outer cover and the connecting belt are integrally formed; a first flanging is formed on the periphery of one end of the inner cover, a second flanging is formed on one end of the first plug part, which is far away from the first through hole, and the first flanging can be adjacent to the second flanging when the first plug part is arranged in the mounting hole; the second outward turned edge is also provided with a handle part which extends outwards along the radial direction of the first plug part; the outer cover is also provided with a second plug part which is formed on one end of the first plug part close to the first through hole, and when the first plug part is installed in the installation hole, the second plug part can be inserted into the first through hole and is in sealing connection with the first through hole.

From the above, the arrangement of the connecting belt enables the detached outer cover to be connected with the inner cover through the connecting belt when adding carbon powder to the developing box, thereby preventing the detached outer cover from being lost; the arrangement of the first flanging can be matched with the developing frame of the developing box to limit the inner cover so as to prevent the inner cover from falling into the powder bin, and the arrangement of the second flanging can prevent the outer cover from being excessively installed in the mounting hole, so that the outer cover is more convenient to detach; the convenience of outer cover disassembly can be further improved by the aid of the handle part; the second plug portion is provided such that the second outer portion can be connected with the second through hole when the outer cap is mounted to the inner cap, to further enhance the connection firmness of the outer cap and the inner cap.

In order to achieve the second object of the utility model, the utility model provides a developing box, which comprises a developing frame, wherein the developing frame is provided with a powder bin and a powder adding port, the powder adding port is communicated with the powder bin, the developing box further comprises the powder adding port cover assembly, an inner cover is arranged in the powder adding port, and a first through hole is communicated with the powder bin.

From the above, the developing box provided with the powder adding cover assembly can avoid the carbon powder from leaking out of the developing box in the process of adding the carbon powder into the powder bin, further prevent the carbon powder from polluting the surrounding environment of the developing box, hands of operators and the like, further prevent the operators from sucking the carbon powder, and avoid the health of the operators from being endangered.

In order to achieve the third object of the present utility model, the present utility model provides a process cartridge including the above-described developing cartridge.

From the above, the processing box provided with the developing box can avoid the carbon powder from leaking out of the developing box in the process of adding the carbon powder into the powder bin of the developing box, further prevent the carbon powder from polluting the surrounding environment of the processing box and hands of an operator, and the like, and also prevent the operator from sucking the carbon powder, so that the health of the operator is prevented from being endangered.

In order to achieve the fourth object of the present utility model, there is provided an electrophotographic image forming apparatus comprising a housing in which a process cartridge mounting chamber is provided, wherein the process cartridge described above is mounted in the process cartridge mounting chamber.

From the above, the electrophotographic image forming apparatus provided with the above-mentioned process cartridge can avoid the toner from leaking out of the developing cartridge in the process of adding toner into the toner hopper of the developing cartridge, thereby preventing the toner from polluting the surrounding environment of the electrophotographic image forming apparatus and the hands of an operator, and the like, and also preventing the operator from sucking the toner, and avoiding the health of the operator from being endangered.

Drawings

Fig. 1 is a structural view of a first embodiment of the developing cartridge of the present utility model.

Fig. 2 is a structural view of a developing frame of a first embodiment of the developing cartridge of the present utility model.

Fig. 3 is an exploded view of a first embodiment of a developer cartridge of the present utility model.

Fig. 4 is a sectional view of the cap assembly of the first embodiment of the developing cartridge of the present utility model when the outer cap and the inner cap are assembled.

Fig. 5 is a schematic view of a powdered state of a first embodiment of the developing cartridge of the present utility model.

Fig. 6 is a cross-sectional view of a toner cap assembly of a second embodiment of the developing cartridge of the present utility model.

Fig. 7 is a block diagram of a powder cap assembly of a third embodiment of a developing cartridge of the present utility model.

Fig. 8 is a cross-sectional view of a powder cap assembly of a third embodiment of a developing cartridge of the present utility model.

Fig. 9 is a block diagram of a toner hopper cover assembly according to a fourth embodiment of the present utility model.

Fig. 10 is a cross-sectional view of a toner cap assembly of a fourth embodiment of the developing cartridge of the present utility model.

The utility model is further described below with reference to the drawings and examples.

Detailed Description

First embodiment of developing cartridge

Referring to fig. 1 and 2, the developing cartridge 100 includes a developing frame 1 and a powder cap assembly 2. The developing frame 1 is provided with a powder bin 11 and a powder adding port 12, the powder bin 11 is used for storing carbon powder, the powder adding port 12 is communicated with the powder bin 11, so that when the residual amount of the carbon powder in the powder bin 11 is insufficient, a user can adopt the carbon powder bottle 3 and supplement the carbon powder into the powder bin 11 through the powder adding port 12, and further the developing box 100 can be used continuously.

The powder filling cap assembly 2 is mounted on the powder filling port 12, so that when the developing box 100 is in a non-powder filling state, the powder filling cap assembly 2 can seal the powder filling port 12, and further, carbon powder in the powder bin 11 is prevented from leaking out of the developing box 100. Referring to fig. 3 and 4, in the present embodiment, the powder cap assembly 2 includes an inner cap 21, an outer cap 22, a connection band 23, and a sealing member 24.

The inner cap 21 is mounted in the powder charging port 12, the inner cap 21 has a mounting hole 211 and a first through hole 212, a first opening of the mounting hole 211 is formed on a first end of the inner cap 21 in an axial direction of the inner cap 21, and the axial direction of the mounting hole 211 is parallel to the axial direction of the inner cap 21. A first through hole 212 is formed on the second end of the inner lid 21, the first through hole 212 penetrates the inner lid 21 in the axial direction of the mounting hole 211, and the first through hole 212 communicates the powder bin 11 with the mounting hole 211. Preferably, a limiting protrusion 214 is formed on the outer circumferential surface of the inner cap 21, and when the inner cap 21 is mounted in the powder adding port 12, the limiting protrusion 214 abuts against the wall of the powder adding port 12 to better prevent the inner cap 21 from falling out of the powder adding port 12, thereby avoiding the leakage of the carbon powder in the powder bin 11.

The first aperture of the first through hole 212 is smaller than the second aperture of the mounting hole 211 such that a second inner flange 2101 is formed between the first through hole 212 and the body 210 of the inner cap 21, the second inner flange 2101 being for carrying the seal 24. Further, in the present embodiment, the first aperture of the first through hole 212 is preferably equal to or larger than the cross-sectional diameter of the charging nozzle 31 of the toner bottle 3.

Further, a first flange 213 is formed on the outer periphery of the first end of the inner cap 21 so that when the inner cap 21 is mounted into the powder feeding port 12, the first flange 213 can limit the inner cap 21 in cooperation with the developing frame 1 to prevent the inner cap 21 from being excessively mounted to fall into the powder hopper 11. Further, the inner wall of the mounting hole 211 is formed with a first anti-slip portion 2111.

The outer cover 22 has a first plug portion 221 and a second plug portion 222, the first plug portion 221 is detachably mounted in the mounting hole 211, and when the first plug portion 221 is mounted in the mounting hole 211, the first plug portion 221 abuts against the outer peripheral wall and the inner hole wall of the mounting hole 211 to achieve an interference fit between the first plug portion 221 and the mounting hole 211, thereby sealing the powder-adding port 12. Preferably, the second anti-slip part 2211 is provided on the outer circumferential wall of the first stopper 221, and when the first stopper 221 is mounted into the mounting hole 211, the first anti-slip part 2111 is cooperatively connected with the second anti-slip part 2211 to improve the connection firmness between the inner cap 21 and the outer cap 22, preventing the problem of loosening of the connection between the outer cap 22 and the inner cap 21 due to the influence of vibration generated during transportation or during operation of the electrophotographic image forming apparatus from occurring in the developing cartridge 100.

In addition, a second flange 2212 is formed on the outer circumferential wall of the first plug 221 remote from the first end of the first through hole 212, and the first flange 213 may abut against the second flange 2212 when the first step is installed in the installation hole 211, so as to prevent the outer cap 22 from being excessively installed in the installation hole 211, thereby making it more convenient to detach the outer cap 22. Preferably, the second flange 2212 has a handle portion 2213, and the handle portion 2213 extends outward of the second flange 2212 along a radial direction of the first plug 221, and the handle portion 2213 is configured to further enhance the convenience of removing the outer cover 22.

The second plug portion 222 is formed at one end of the first outer portion near the first through hole 212, and when the first plug portion 221 is installed in the installation hole 211, the second plug portion 222 may be inserted into the first through hole 212 and be connected with the first through hole 212 in a sealing manner, so as to further improve the connection firmness of the outer cap 22 and the inner cap 21.

The first end of the connection band 23 is connected to the inner cap 21, the second end of the connection band 23 is connected to the outer cap 22, and the inner cap 21, the outer cap 22, and the connection band 23 are preferably integrally formed. The connection belt 23 is provided such that the detached outer cap 22 can be connected to the inner cap 21 through the connection belt 23 when adding toner into the toner hopper 11 of the developing cartridge 100, to prevent the detached outer cap 22 from being carelessly lost.

The seal member 24 is mounted in the mounting hole 211, the seal member 24 has an opening 241, the opening 241 communicates the first through hole 212 and the mounting hole 211, and the seal member 24 is elastically deformable. Because the sealing piece 24 has certain elastic deformability, the opening 241 on the sealing piece 24 can accommodate the powder adding mouth 31 of the carbon powder bottle 3 with a larger size than the opening 241 of the sealing piece 24, when the powder adding mouth 31 passes through the opening 241 and is inserted into the first through hole 212, the opening 241 can be better in interference fit with the powder adding mouth 31, so that the carbon powder can be better prevented from leaking out of the powder bin 11 from a gap between the first through hole 212 and the powder adding mouth 31 and/or a gap between the opening 241 and the powder adding mouth 31; furthermore, when the powder adding nozzle 31 exits the first through hole 212, the size of the opening 241 can be gradually reduced along with the exit of the powder adding nozzle 31 until the initial state is restored, and in the process, the opening 241 can play a role in scraping the peripheral wall of the powder adding nozzle 31, so that the carbon powder adsorbed on the peripheral wall of the powder adding nozzle 31 is scraped into the powder bin 11 from the powder adding nozzle 31, the effect of cleaning the powder adding nozzle 31 is achieved, an operator does not need to wipe the powder adding nozzle 31 after the carbon powder of the developing box 100 is added, the workload of the operator is reduced, and the experience of the operator is improved. The sealing member 24 may be made of sponge, silica gel or rubber, and the sealing member 24 is made of sponge in this embodiment. Preferably, the opening 241 of the sealing member 24 toward the open end of the mounting hole 211 is provided with a slanted guide face 242, and the slanted guide face 242 is provided to facilitate insertion of the toner filling nozzle 31 of the toner bottle 3 and the second plug portion 222 of the outer cap 22.

Furthermore, in the present embodiment, the opening 241 is a second through hole, which penetrates the sealing member 24 along the axial direction of the mounting hole 211, and the third aperture of the second through hole is smaller than or equal to the first aperture of the first through hole 212. Of course, in another embodiment, the opening 241 may also have a star shape, and in the axial direction of the mounting hole 211, the projection of the star-shaped opening 241 is located in the projection of the first through hole 212; in yet another embodiment, the opening 241 may also be a cross-shaped opening 241, so that the opening 241 can be adapted to different calibers of the powder adding nozzle 31. In addition, the sealing member 24 is fixed to the second inner flange 2101 by bonding, so as to improve the connection firmness of the inner cover 21 of the sealing member 24 and better prevent the toner from leaking out of the developing cartridge 100.

The use of the filler cap assembly 2 is briefly described below in connection with fig. 1-5:

when the developing cartridge 100 is in the non-powder-added state, the outer cap 22 is mounted on the inner cap 21 such that the first plug portion 221 of the outer cap 22 is interference-fitted into the mounting hole 211 of the inner cap 21, the second plug portion 222 of the outer cap 22 is interference-fitted into the second through hole of the inner cap 21, and the first anti-slip portion 2111 is coupled with the second anti-slip portion 2211. Meanwhile, the first plug 221 is pressed against the end of the sealing member 24 facing the opening of the mounting hole 211 to achieve sealing of the first through hole 212, and the second plug 222 passes through the opening 241 of the sealing member 24 and makes the opening 241 enlarged; further, the first turned-out edge 213 on the inner lid 21 abuts the second turned-in edge 2101 on the outer lid 22 to limit the outer lid 22 while further preventing toner in the toner hopper 11 from leaking.

When it is necessary to add toner into the toner hopper 11 of the developing cartridge 100, the outer cap 22 may be detached from the inner cap 21 by pulling the handle portion 2213 on the outer cap 22, and the detached outer cap 22 may be attached to the inner cap 21 by the attachment tape 23 to prevent loss. Subsequently, the toner applying nozzle 31 of the toner bottle 3 is inserted into the mounting hole 211 of the inner cap 21 such that the toner applying nozzle 31 passes through the mounting hole 211, the opening 241, and the first through hole 212 in this order. At this time, the outer peripheral wall of the tip 31 is closely fitted to the opening 241 of the seal 24, and the opening 241 is widened.

When the carbon powder bottle 3 is extruded to add carbon powder into the powder bin 11, the carbon powder in the carbon powder bottle 3 and air are extruded into the powder bin 11 together, and the air pressure in the powder bin 11 is increased in a short time because the peripheral wall of the powder adding nozzle 31 is tightly attached to the opening 241 of the sealing member 24, and the carbon powder which is hit by the air flow formed by the air is mixed in the air. Moreover, because the air pressure in the powder bin 11 can be increased in a short time, under the influence of the air pressure, part of the air in the powder bin 11 overflows out of the powder bin 11 from the gap between the powder adding nozzle 31 and the opening 241 so as to balance the air pressure inside and outside the powder bin 11, when the air mixed with the carbon powder flows through the gap between the powder adding nozzle 31 and the opening 241, the sealing piece 24 cooperates with the powder adding nozzle 31 to filter the air, so that the carbon powder mixed in the air is filtered out at one side of the sealing piece 24 close to the powder bin 11 and falls into the powder bin 11, thereby achieving the purpose of preventing the carbon powder from leaking out of the powder bin 11 and polluting the surrounding environment of the developing box 100 and/or the hands of an operator in the powder adding process, and simultaneously avoiding the operator from sucking the carbon powder mistakenly, and protecting the health of the operator.

After the carbon powder of the powder bin 11 is completely added, when an operator pulls the powder adding nozzle 31 of the carbon powder bottle 3 away from the inner cover 21, under the action of self elastic deformation, the size of the opening 241 gradually becomes smaller along with the withdrawal of the powder adding nozzle 31 in the process of withdrawing the powder adding nozzle 31 from the first through hole 212 so as to scrape and clean the peripheral wall of the powder adding nozzle 31 until the powder adding nozzle 31 is completely pulled away from the inner cover 21, the size of the opening 241 is restored to an initial state, and therefore the carbon powder adsorbed on the peripheral wall of the powder adding nozzle 31 is scraped into the powder bin 11 from the powder adding nozzle 31, the effect of cleaning the powder adding nozzle 31 is achieved, the operator does not need to wipe the powder adding nozzle 31 after the addition of the developing box 100 is completed, the workload of the operator is reduced, and the experience of the operator is improved.

In summary, through the design to adding the powder flap subassembly for when adding the toner to the powder storehouse of developing box, the toner can not leak out the powder storehouse, and then avoids the surrounding environment of toner pollution developing box and operator's hand etc. to prevent that the operator from inhaling the toner, protect operator's health.

Second embodiment of developing cartridge

Referring to fig. 6, this embodiment is different from the first embodiment of the developing cartridge in that in this embodiment, the provision of the seal member and the second burring is canceled, and the inner cap 4 is designed as follows:

a first inward flange 43 is formed between the first through hole 41 of the inner cap 4 and the body 42 of the inner cap 4, and the first inward flange 43 is elastically deformable. The first inner flange 43 is made of silica gel, thermoplastic elastomer, polyvinyl chloride or rubber, and the first inner flange 43 is integrally formed with the body 42 of the inner cap 4. The design makes first through-hole 41 can hold the bigger powder adding mouth than self aperture, and when adding the powder mouth and inserting in the first through-hole 41, first through-hole 41 can carry out interference fit with adding the powder mouth better, thereby better prevent that the carbon dust from adding the clearance between the powder mouth and the powder mouth from first through-hole 41 from letting out the powder storehouse, furthermore, the above-mentioned design still makes when adding the in-process that the powder mouth withdraws from first through-hole 41, the aperture of first through-hole 41 can become gradually smaller along with the withdrawal of adding the powder mouth until resume initial aperture, and in this process, first inward flange 43 can play the effect of scraping the perisporium of adding the powder mouth, thereby scrape into the powder storehouse from adding the powder mouth with the carbon dust that will adsorb on the perisporium of adding the powder mouth, in order to reach clean the effect of adding the powder mouth, make the operator after accomplishing the carbon dust to add the developing box, the work load of reducing the operator, promote the operator's experience and feel. Furthermore, it should be noted that, in other embodiments, the first through hole 41 may also be designed in a star shape or a cross shape.

Third embodiment of developing cartridge

Referring to fig. 7 and 8, this embodiment is different from the first embodiment of the developing cartridge in that in this embodiment, the manner of adhesively securing the seal member to the second inside flange is canceled, and the inner cap 5 is designed as follows:

the mounting hole 51 of the inner lid 5 is provided with an engagement portion, a lock position is formed between the engagement portion and the second inside flange 53, and the seal 56 is provided in the lock position. Specifically, in the present embodiment, the engaging portion includes a plurality of hooks 52, the plurality of hooks 52 are distributed on the second inner flange 53 along the circumferential direction of the first through hole 54, a clamping position is formed between the hook portion 521 of the hook 52 and the second inner flange 53, and the hook 52 is located between the second inner flange 53 and the first anti-slip portion 55. The sealing element 56 is installed in the inner cover 5 in a clamping connection mode, so that when the sealing element 56 is aged, hot cracked and the like, the sealing ring can be replaced more conveniently, and the service life of the powder adding port cover assembly is prolonged.

Fourth embodiment of developing cartridge

Referring to fig. 9 and 10, this embodiment is different from the first embodiment of the developing cartridge in that, in this embodiment, the manner of adhesively securing the seal 63 to the second inside flange is canceled, the design of the first anti-slip portion on the inner cap 61 is canceled, the design of the second anti-slip portion on the outer cap 62 is canceled, and the inner cap 61 and the outer cap 62 are designed as follows:

the mounting hole 611 of the inner cap 61 is provided with a locking portion, a locking position is formed between the locking portion and the second inner flange 613, and the sealing member 63 is provided in the locking position. Specifically, the engaging portion includes a plurality of first protruding blocks 612, the plurality of first protruding blocks 612 are distributed on the inner hole wall along the circumferential direction of the mounting hole 611, and a clamping position is formed between a surface of the first protruding block 612 facing the second inner flange 613 and the second inner flange 613. Preferably, a first clamping groove 614 is formed between two adjacent first protruding blocks 612, a plurality of second protruding blocks 622 are formed on the outer peripheral wall of the first plug portion 621 of the outer cover 62, a second clamping groove 623 is formed between two adjacent second protruding blocks 622, when the first plug portion 621 is mounted in the mounting hole 611, one first protruding block 612 is in clamping connection with one second clamping groove 623, and one second protruding block 622 is in clamping connection with one first clamping groove 614.

Fifth embodiment of developing cartridge

The present embodiment is different from the above-described first to fourth embodiments of the developing cartridge in that in the present embodiment, the setting of the connecting belt is canceled.

Process cartridge embodiment

The process cartridge includes a developing cartridge and a drum cartridge, the developing cartridge being mounted on the drum cartridge, a developing roller of the developing cartridge being abutted against a photosensitive drum of the drum cartridge, wherein the developing cartridge is the developing cartridge described in any one of the first to fifth embodiments of the developing cartridge described above. The processing box provided with the developing box can prevent carbon powder from leaking out of the developing box in the process of adding the carbon powder into the powder bin of the developing box, further prevent the carbon powder from polluting the surrounding environment of the processing box, hands of an operator and the like, further prevent the operator from sucking the carbon powder, and avoid the health of the operator from being endangered.

Electrophotographic image forming apparatus embodiment

The electrophotographic image forming apparatus includes a housing in which a process cartridge mounting chamber is provided, wherein the process cartridge described in the above process cartridge embodiment is mounted. The electrophotographic image forming apparatus provided with the above-mentioned process cartridge can avoid toner from leaking out of the developing cartridge in the process of adding toner into the toner hopper of the developing cartridge, thereby preventing the toner from polluting the surrounding environment of the electrophotographic image forming apparatus and hands of operators, and the like, and also preventing operators from sucking the toner, and avoiding the health of operators from being endangered.

Finally, it should be emphasized that the foregoing description is merely illustrative of the preferred embodiments of the utility model, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and principles of the utility model, and any such modifications, equivalents, improvements, etc. are intended to be included within the scope of the utility model.

Claims (10)

1. Add powder flap subassembly, its characterized in that includes:

the inner cover is provided with a mounting hole and a first through hole, the opening of the mounting hole is formed in the first end of the inner cover, the first through hole is formed in the second end of the inner cover, the first through hole penetrates through the inner cover along the axial direction of the mounting hole and is communicated with the mounting hole, and the first aperture of the first through hole is smaller than the second aperture of the mounting hole;

and the outer cover is provided with a first plug part which is detachably arranged in the mounting hole, and the peripheral wall of the first plug part is adjacent to the inner hole wall of the mounting hole.

2. The powder cap assembly of claim 1, wherein:

a first inward flanging is formed between the first through hole and the body of the inner cover, and the first inward flanging can be elastically deformed;

the first inner flanging is made of silica gel, thermoplastic elastomer, polyvinyl chloride or rubber;

the first inward flange is integrally formed with the body of the inner cover.

3. The powder cap assembly of claim 1, wherein:

the powder adding cover assembly further comprises a sealing piece, wherein the sealing piece is installed in the installation hole and is provided with an opening, and the opening is communicated with the first through hole and the installation hole;

the opening is a second through hole penetrating through the sealing element along the axial direction, and the third aperture of the second through hole is smaller than or equal to the first aperture, or

The opening is star-shaped, in the axial direction, the projection of the opening is positioned in the projection of the first through hole, or

The opening is a cross opening, and the sealing element can be elastically deformed.

4. The powder cap assembly of claim 3, wherein:

a second inward flanging is formed between the first through hole and the body of the inner cover;

the seal may be made of sponge, silicone or rubber;

the sealing member being adhesively secured to the second inner peripheral edge, or

The mounting hole is internally provided with a clamping part, a clamping position is formed between the clamping part and the second inner flanging, and the sealing element is arranged in the clamping position.

5. The powder cap assembly of claim 4, wherein:

when the clamping part is arranged in the mounting hole:

the clamping part comprises a plurality of clamping hooks, the clamping hooks are distributed on the second inner flanging along the circumferential direction of the first through hole, and clamping positions are formed between the clamping parts of the clamping hooks and the second inner flanging; or (b)

The clamping part comprises a plurality of first protruding blocks, the first protruding blocks are distributed on the inner hole wall along the circumferential direction of the mounting hole, and clamping positions are formed between one surface of the first protruding block facing the second inner flanging and the second inner flanging.

6. The powder cap assembly of claim 5, wherein:

when the first plug part is installed in the installation hole, one first lug is connected in one second clamping groove in a clamping way, and one second lug is connected in one first clamping groove in a clamping way;

when the sealing element is adhered and fixed on the second inner turnup or when the clamping part comprises a plurality of clamping hooks, a first anti-slip part is formed on the inner hole wall, a second anti-slip part is formed on the outer peripheral wall, and when the first plug part is installed in the installation hole, the first anti-slip part is connected with the second anti-slip part in a matched mode.

7. The filler cap assembly of any one of claims 1 to 6, wherein:

the powder adding cover assembly further comprises a connecting belt, wherein the connecting belt is connected with the inner cover and the outer cover respectively, and the inner cover, the outer cover and the connecting belt are integrally formed;

a first flanging is formed on the periphery of one end of the inner cover, a second flanging is formed on one end of the first plug part, which is far away from the first through hole, and the first flanging can be adjacent to the second flanging when the first plug part is arranged in the mounting hole;

the second outward flange is also provided with a handle part which extends outwards towards the second outward flange along the radial direction of the first plug part;

the outer cover is further provided with a second plug part, the second plug part is formed on one end, close to the first through hole, of the first plug part, and when the first plug part is installed in the installation hole, the second plug part can be inserted into the first through hole and is in sealing connection with the first through hole.

8. Developing cartridge comprising a developing frame having a powder bin and a powder feeding port communicating with the powder bin, characterized in that the developing cartridge further comprises a powder feeding cap assembly according to any one of the preceding claims 1 to 7, the inner cap being mounted in the powder feeding port, the first through hole communicating with the powder bin.

9. A process cartridge comprising the developing cartridge according to claim 8.

10. An electrophotographic image forming apparatus comprising a housing, a process cartridge mounting chamber being provided in the housing, wherein the process cartridge according to claim 9 is mounted in the process cartridge mounting chamber.