CN210402018U

CN210402018U - Carbon powder box

Info

Publication number: CN210402018U
Application number: CN201921640056.8U
Authority: CN
Inventors: 杨晓锋; 苏健强
Original assignee: Print Rite Unicorn Image Products Co Ltd
Current assignee: Print Rite Unicorn Image Products Co Ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-04-24
Anticipated expiration: 2029-09-27

Abstract

The utility model provides a toner cartridge, include: the box body is provided with a carbon powder cavity for containing carbon powder; the developing roller can be supported between the two end walls of the box body in a rotating mode around the axis of the developing roller, and comprises a developing roller shaft supported on the two end walls of the box body; the powder feeding roller can be supported between the two end walls of the box body in a rotating way around the axis of the powder feeding roller, and comprises powder feeding roller shafts supported on the two end walls of the box body; a conductive plastic member having an electrical contact portion for contacting an output electrical contact of the image forming apparatus and an output portion contacting one end of the developing roller shaft/one end of the powder feeding roller shaft; the two ends of the metal piece are respectively contacted with the developing roller shaft and the powder feeding roller shaft; the conductive plastic part and the metal part are positioned on the outer side of the same end wall of the box body. The carbon powder is stably transferred from the powder feeding roller to the developing roller, the powder feeding of the carbon powder box is more uniform, and the printing quality is stable. The toner cartridge has the advantages of few parts, simple structure, few assembling procedures and lower cost.

Description

Carbon powder box

Technical Field

The utility model belongs to the technical field of the printing consumables technique and specifically relates to a detachably installs imaging device's cartridge is related to.

Background

An image forming apparatus of an electrophotographic type, such as a laser printer, is an apparatus for forming an image on an image forming medium, such as paper, by using the principle of electrophotography through processes of charging, exposure, development, transfer, fixing, cleaning, and the like. Image forming apparatuses generally provide toner using a toner cartridge detachably mounted therein. Besides holding the toner, the toner cartridge usually integrates a developing member such as a developing roller, a toner feeding roller, a toner discharging blade, and the like, wherein the toner feeding roller is used for feeding the toner to the developing roller to form a toner layer, the toner discharging blade is used for adjusting the thickness of the toner layer on the developing roller, and the developing roller is used for developing the electrostatic latent image on the photosensitive element by using the toner carried on the developing roller. In the developing process, the developing roller, the powder feeding roller and the like generally need to be electrified to charge the toner with the required charges.

Referring to fig. 1, fig. 1 shows a conventional toner cartridge 1 detachably mountable to an image forming apparatus, and has a cartridge body 11, a powder feed roller (not shown), a developing roller 12, a first conductive member 13 and a second conductive member 14, the first conductive member 13 being connected to an end portion of a developing roller power supply contact 2 of the image forming apparatus and an end portion of a rotation shaft of the developing roller 12, respectively, the second conductive member 14 being connected to a powder feed roller power supply contact 3 of the image forming apparatus and an end portion of a rotation shaft of the powder feed roller, respectively, the first conductive member 13 and the second conductive member 14 being provided separately from each other. The conductive parts are separated from each other and are respectively connected with the developing components, so that the conductive end of the toner cartridge 1 has more parts and complex structures, and therefore, the assembly process is more, and the cost of the toner cartridge 1 is higher. Moreover, the plurality of conductive contacts separated from each other may cause unevenness in voltage of the receiving image forming apparatus, resulting in unevenness in toner application when toner on the toner cartridge 1 is transferred from the toner hopper to the developing roller 12 and the photosensitive drum, thereby causing a poor printing phenomenon.

Disclosure of Invention

In order to solve the above problems, the main object of the present invention is to provide a toner cartridge having a simple structure, a small number of assembling processes, a low cost and a good working stability.

In order to realize the above-mentioned main objective, the utility model provides a toner cartridge, include: the box body is provided with a carbon powder cavity for containing carbon powder; the developing roller can be supported between the two end walls of the box body in a rotating mode around the axis of the developing roller, and comprises a developing roller shaft supported on the two end walls of the box body; the powder feeding roller can be supported between the two end walls of the box body in a rotating way around the axis of the powder feeding roller, and comprises powder feeding roller shafts supported on the two end walls of the box body; a conductive plastic member having an electrical contact portion for contacting an output electrical contact of the image forming apparatus and an output portion contacting one end of the developing roller shaft/one end of the powder feeding roller shaft; the two ends of the metal piece are respectively contacted with the developing roller shaft and the powder feeding roller shaft; the conductive plastic part and the metal part are positioned on the outer side of the same end wall of the box body.

According to the scheme, the electric contact part of the conductive plastic part is used for being in contact with an output electric contact of the imaging equipment, the voltage output by the power supply contact of the developing roller is transmitted to the developing roller shaft/powder feeding roller shaft through the output part of the conductive plastic part, and then the voltage is transmitted between the developing roller shaft and the powder feeding roller shaft through the metal part. Because electrically conductive plastic part and metalwork all have certain resistance, make imaging device's input voltage pass through electrically conductive plastic part and metalwork after, the voltage that transmits developing roller axle and powder feeding roller axle is between maximum electrified voltage and minimum electrified voltage, realize the transfer of carbon dust from powder feeding roller to developing roller steadily, make the cartridge powder feeding more even, print the stable quality. Moreover, the arrangement of the electric contact and the connecting piece which are respectively connected and separated for each developing component is not needed, so that the number of parts of the toner cartridge is reduced, and the toner cartridge has a simple structure, few assembling procedures and lower cost.

The further scheme is that, output portion and the one end contact of developing roller axle, the cartridge still includes the bearing, and the bearing is located between electrically conductive plastic part and the box body, and the bearing includes first maintenance portion, and first maintenance portion keeps developing roller axle with rotatable mode, and output portion supports first maintenance portion.

The further scheme is that the output part is sleeved at one end of the developing roller shaft, so that the output part is in contact with the circumferential surface of the developing roller shaft, and the stability of electric contact is improved.

According to a further scheme, the carbon powder box further comprises a spring, and the spring abuts between the output part and one axial end face of the developing roller shaft, so that the stability of electric contact is improved.

Still further, the bearing further includes a second holding portion that rotatably holds the powder feed roller shaft.

The output part is contacted with one end of the powder feeding roller shaft, the carbon powder box further comprises an end cover, the end cover is installed on one end wall of the box body, the output part is located between the end cover and the box body, and the end cover comprises a first supporting part which can rotatably keep the powder feeding roller shaft.

The output part is sleeved at one end of the powder feeding roller shaft, so that the output part is in contact with the circumferential surface of the powder feeding roller shaft, and the stability of electric contact is improved.

Still further, the end cap includes a second supporting portion that rotatably holds the developing roller shaft.

According to a further scheme, the first end of the metal piece is arranged in a circular ring shape, and the first end of the metal piece is sleeved on the developing roller shaft/the powder feeding roller shaft, so that the stability of electric contact is improved.

The second end of the metal piece is also arranged in a circular ring shape, and the second end of the metal piece is sleeved on the developing roller shaft/the powder feeding roller shaft, so that the stability of electric contact is improved.

Drawings

Fig. 1 is a structural view of a conventional toner cartridge.

Fig. 2 is a structural diagram of the first embodiment of the toner cartridge of the present invention.

Fig. 3 is a partially exploded view of a first embodiment of the toner cartridge of the present invention.

Fig. 4 is a structural diagram of a conductive plastic part in a first embodiment of the toner cartridge of the present invention.

Fig. 5 is a structural diagram of a metal member in a first embodiment of the toner cartridge of the present invention.

Fig. 6 is a first view structural diagram of a bearing in a first embodiment of the toner cartridge of the present invention.

Fig. 7 is a second view structural diagram of the bearing of the first embodiment of the toner cartridge of the present invention.

Fig. 8 is a first partial structure view of the first embodiment of the toner cartridge of the present invention.

Fig. 9 is a second partial structure diagram of the first embodiment of the toner cartridge of the present invention.

Fig. 10 is a structural view of a second embodiment of the toner cartridge of the present invention.

Fig. 11 is a partially exploded view of a second embodiment of the toner cartridge of the present invention.

Fig. 12 is a structural diagram of a conductive plastic part in a second embodiment of the toner cartridge of the present invention.

Fig. 13 is a structural diagram of a metal member in a second embodiment of the toner cartridge of the present invention.

Fig. 14 is a structural view of an end cap of a second embodiment of the toner cartridge of the present invention.

The present invention will be further explained with reference to the drawings and examples.

Detailed Description

Toner cartridge first embodiment:

referring to fig. 2 and 3, the toner cartridge 4 includes a cartridge body 41, a developing roller 42, a toner feeding roller, a conductive plastic member 43, a metal member 48, and a bearing 44, the cartridge body 41 has a toner chamber for accommodating toner, and the conductive plastic member 43 and the metal member 48 are located outside the same end wall of the cartridge body 41. The developing roller 42 is supported between both end walls of the cartridge body 41 so as to be rotatable about its axis, and the developing roller 42 includes a developing roller shaft 421 supported on both end walls of the cartridge body 41. The powder feeding roller is supported between both end walls of the box body 41 so as to be rotatable about its own axis, and includes a powder feeding roller shaft 451 supported on both end walls of the box body 41.

Referring to fig. 4, the conductive plastic member 43 has an electrical contact portion 431 for contacting an output electrical contact of the image forming apparatus and an output portion 433, the output portion 433 contacting one end of the developing roller shaft 421. Specifically, the output portion 433 is provided in a blind hole shape, a fixing column 434 is provided in the blind hole, a spring 46 is sleeved on the fixing column 434, and the spring 46 abuts between a bottom surface of the blind hole and an axial end surface of the developing roller shaft 421. The conductive plastic member 43 has an opening 432 formed in the axial direction of the case 41, the opening 432 is fitted over the mounting post 412 on the end wall of the case 41, and the conductive plastic member 43 is fixed to the end wall of the case 41 by the engagement of the screw 47 with the mounting post 412.

Referring to fig. 5, both ends of the metal member 48 are respectively in contact with the developing roller shaft 421 and the powder feeding roller shaft 451, and specifically, the first end 481 of the metal member 48 is annularly provided, and the first end 481 of the metal member 48 is fitted over the developing roller shaft 421, so that the first end 481 of the metal member 48 is in contact with the circumferential surface of the developing roller shaft 421. The second end 482 of the metal fitting 48 is an elastic contact portion that contacts the outer peripheral surface of the powder feed roller shaft 451.

Referring to fig. 6 to 9, the bearing 44 is located between the conductive plastic member 43 and the case body 41, the bearing 44 includes a first holding portion 441, a second holding portion 442, a first catching portion 444, a second catching portion 445, and a stopper portion 443, the first holding portion 441 rotatably holds the developing roller shaft 421, the output portion 433 supports the first holding portion 441, and the second holding portion 442 rotatably holds the toner feeding roller shaft 451. Specifically, the first holding portion 441 is provided in a cylindrical shape, and the first holding portion 441 is fitted over the developing roller shaft 421. The output portion 433 is the blind hole form setting, and the open end of output portion 433 cup joints the one end at first holding portion 441 to play the effect of supporting first holding portion 441. The second holding portion 442 is provided in a blind hole shape, and the second holding portion 442 is fitted around the powder feed roller shaft 451. The conductive plastic member 43 is provided with a flange 435 extending in an axial direction of the vertical box 41, and a stop 443 is engaged with the flange 435 for limiting the position of the conductive plastic member 43 on the bearing 44. The first locking portion 444 extends in the axial direction of the case 41, the case 41 is provided with a boss 413 protruding in the direction perpendicular to the axial direction of the case, and the first locking portion 444 is locked to the boss 413 to limit the position of the bearing 44 in the axial direction of the case 41. The second locking portion 445 extends axially along the box 41, a through hole 411 is formed in the end wall of the box 41 in the axial direction, and the second locking portion 445 penetrates through the through hole 411 and is hooked on the side surface of the end wall of the box 41 away from the bearing 44, and is also used for limiting the position of the bearing 44 in the axial direction of the box 41. In this embodiment, the first latching portion 441 is disposed adjacent to the second holding portion 442, and the second latching portion 445 is disposed adjacent to the first holding portion 441.

The output part 433 of the conductive plastic member 43 of the present embodiment is not in direct contact with one end of the developing roller shaft 421, so that the voltage is transmitted to the developing roller shaft 421 through the output part 433 and the spring 46, and the output part 433 is in contact with only the shaft end surface of the developing roller shaft 421 through the spring 46. In another embodiment, the output portion 433 may be in direct contact with one end of the developing roller shaft 421, that is, the output portion 433 is sleeved on one end of the developing roller shaft 421 to rotatably hold the developing roller shaft 421, so that the output portion 433 is in contact with the circumferential surface of the developing roller shaft 421, and the output portion 433 is also in surface contact with the shaft end of the developing roller shaft 421 through the spring 46. In another embodiment, the spring 46 is not provided between the carry-out section 433 and the developing roller shaft 421, and the carry-out section 433 is fitted over one end of the developing roller shaft 421 to rotatably hold the developing roller shaft 421 so that the carry-out section 433 is in contact with only the circumferential surface of the developing roller shaft 421.

After the toner cartridge 4 of the embodiment is mounted to the image forming apparatus, the electrical contact portion 431 of the conductive plastic member 43 is used for contacting with an output electrical contact of the image forming apparatus, the electrical contact portion 431 of the conductive plastic member 43 of the embodiment contacts with the developing roller power supply contact 2 of the image forming apparatus, the voltage output by the developing roller power supply contact 2 is transmitted to the developing roller shaft 421 through the output portion 433 of the conductive plastic member 43, and then the voltage of the developing roller shaft 421 is transmitted to the toner feeding roller shaft 451 through the metal member 48. Because the conductive plastic part 43 and the metal part 48 both have certain resistance, the voltage transmitted to the developing roller shaft 421 and the powder feeding roller shaft 451 after the input voltage of the imaging device passes through the conductive plastic part 43 and the metal part 48 is between the maximum charged voltage and the minimum charged voltage, so that the transfer of the carbon powder from the powder feeding roller to the developing roller 42 is realized stably, the powder feeding of the carbon powder box 4 is more uniform, and the printing quality is stable. Moreover, the number of parts of the toner cartridge 4 is reduced without providing electrical contacts and connectors that are connected and separated for each developing member, so that the toner cartridge 4 has a simple structure, fewer assembly processes, and lower cost.

Toner cartridge second embodiment:

as a description of the second embodiment of the toner cartridge of the present invention, only the differences from the first embodiment of the toner cartridge will be described below.

Referring to fig. 10 and 11, the toner cartridge 5 includes a cartridge body 51, a developing roller 52, a powder feeding roller, a conductive plastic member 53, a metal member 55, and an end cover 54, the conductive plastic member 53 having an electrical contact portion 532 and an output portion 533, the electrical contact portion 532 being for contacting one output electrical contact of the image forming apparatus, the output portion 533 being in contact with one end of a powder feeding roller shaft 561. The end cap 54 is mounted on one end wall of the case 51, and the output portion 533 is located between the end cap 54 and the case 51.

Referring to fig. 12, the conductive plastic member 53 further has a main body 531, and the electrical contact portion 532 and the output portion 533 are respectively connected to both ends of the main body 531. The main body 531 is provided with a first through hole 534, and the through hole 531 is sleeved on the mounting column 512 at the end wall of the box body 51. Specifically, the output portion 533 is provided in a cylindrical shape, and the output portion 533 is fitted to one end of the powder feed roller shaft 561 through a hole of the cylinder, so that the output portion 533 contacts a circumferential surface of the powder feed roller shaft 561.

Referring to fig. 13, two ends of the metal member 55 are respectively in contact with the developing roller shaft 521 and the powder feeding roller shaft 561, specifically, a first end 551 of the metal member 55 is annularly arranged, a first end 551 of the metal member 55 is sleeved on the developing roller shaft 521, a second end 552 of the metal member 55 is also annularly arranged, and the second end 552 of the metal member 55 is sleeved on the powder feeding roller shaft 561, so that the two ends of the metal member 55 are respectively in contact with the circumferential surface of the developing roller shaft 521 and the circumferential surface of the powder feeding roller shaft 561.

Referring to fig. 14, the cap 54 includes a first supporting portion 542, a second supporting portion 543, a first hooking portion 544, and a second hooking portion 545, the first supporting portion 542 rotatably holds the powder feeding roller shaft 561, and the second supporting portion 543 rotatably holds the developing roller shaft 521. Specifically, the second supporting portion 543 is provided in a cylindrical shape, and the second supporting portion 543 is fitted over the developing roller shaft 521. The first supporting portion 542 is provided in a blind hole shape, and the first supporting portion 542 is fitted around the powder feed roller shaft 561. The first hooking portion 544 extends in the axial direction of the case 51, and the case 51 is provided with a boss (like the boss 413 of the first embodiment) protruding in the direction perpendicular to the axial direction thereof, and the first hooking portion 544 is hooked on the boss for limiting the position of the guide cover 54 in the axial direction of the case 51. The second hooking portion 545 extends axially along the box body 51, a through hole 511 is formed in the end wall of the box body 51 in the axial direction, and the second hooking portion 545 passes through the through hole 511 and is hooked on the side surface of the end wall of the box body 51 far away from the end cover 54, and is also used for limiting the position of the end cover 54 in the axial direction of the box body 51. The first hooking portion 544 of this embodiment is disposed adjacent to the first supporting portion 542, and the second hooking portion 545 is disposed adjacent to the second supporting portion 543. The end cap 54 is provided with a second through hole 541, the second through hole 541 is sleeved on the mounting column 512 of the end wall of the box body 51, and the end cap 54 and the conductive plastic part 53 are fixed on the end wall of the box body 51 through the matching of the screw 57 and the mounting column 512.

After the toner cartridge 5 of the present embodiment is mounted to the imaging apparatus, the electrical contact portion 532 of the conductive plastic part 53 is configured to contact with an output electrical contact of the imaging apparatus, the electrical contact portion 532 of the conductive plastic part 53 of the present embodiment contacts with the power supply contact 3 of the powder feeding roller of the imaging apparatus, the voltage output by the power supply contact 3 of the powder feeding roller is transmitted to the powder feeding roller shaft 561 through the output portion 533 of the conductive plastic part 53, and then the voltage of the powder feeding roller shaft 561 is transmitted to the developing roller shaft 521 through the metal part 55. Because the conductive plastic part 53 and the metal part 55 both have certain resistance, after the input voltage of the imaging device passes through the conductive plastic part 53 and the metal part 55, the voltage transmitted to the powder feeding roller shaft 561 and the developing roller shaft 521 is between the maximum charged voltage and the minimum charged voltage, so that the transfer of the carbon powder from the powder feeding roller to the developing roller 52 is realized stably, the powder feeding of the carbon powder box 5 is more uniform, and the printing quality is stable. Moreover, the number of parts of the toner cartridge 5 is reduced without providing electrical contacts and connectors that are connected and separated for each developing member, so that the toner cartridge 5 has a simple structure, a small number of assembly processes, and a low cost.

Above embodiment is the preferred example of the utility model, and not the restriction the utility model discloses the range of implementing, the event all according to the utility model discloses the equivalent change or the decoration that structure, characteristic and principle were done of application for patent scope all should be included in the utility model discloses the patent application scope.

Claims

1. A toner cartridge, comprising:

the box body is provided with a carbon powder cavity for containing carbon powder;

the developing roller can be supported between two end walls of the box body in a rotating mode around the axis of the developing roller, and comprises a developing roller shaft supported on the two end walls of the box body;

the powder feeding roller can be rotatably supported between the two end walls of the box body around the axis of the powder feeding roller, and comprises powder feeding roller shafts supported on the two end walls of the box body;

its characterized in that, the cartridge still includes:

a conductive plastic member having an electrical contact portion for contacting an output electrical contact of an image forming apparatus and an output portion contacting one end of the developing roller shaft/one end of the powder feeding roller shaft;

the two ends of the metal piece are respectively contacted with the developing roller shaft and the powder feeding roller shaft;

the conductive plastic part and the metal part are positioned on the outer side of the same end wall of the box body.

2. The toner cartridge of claim 1, wherein:

the output part is contacted with one end of the developing roller shaft, and the toner cartridge further comprises a bearing which is positioned between the conductive plastic part and the cartridge body;

the bearing includes a first holding portion that rotatably holds the developing roller shaft, and the output portion supports the first holding portion.

3. The toner cartridge of claim 2, wherein:

the output part is sleeved at one end of the developing roller shaft.

4. The toner cartridge of claim 2, wherein:

the toner cartridge further includes a spring abutting between the output portion and an axial end surface of the developing roller shaft.

5. The toner cartridge of claim 2, wherein:

the bearing further includes a second holding portion that rotatably holds the powder feed roller shaft.

6. The toner cartridge of claim 1, wherein:

the output part is in contact with one end of the powder feeding roller shaft, the toner cartridge further comprises an end cover, the end cover is installed on one end wall of the cartridge body, and the output part is located between the end cover and the cartridge body;

the end cap includes a first support portion that rotatably holds the powder feed roller shaft.

7. The toner cartridge of claim 6, wherein:

the output part is sleeved at one end of the powder feeding roller shaft.

8. The toner cartridge of claim 6, wherein:

the end cap includes a second supporting portion that rotatably holds the developing roller shaft.

9. The toner cartridge according to any one of claims 1 to 8, wherein:

the first end of the metal piece is arranged in a circular ring shape, and the first end of the metal piece is sleeved on the developing roller shaft/the powder feeding roller shaft.

10. The toner cartridge of claim 9, wherein:

the second end of the metal piece is also arranged in a circular ring shape, and the second end of the metal piece is sleeved on the developing roller shaft/the powder feeding roller shaft.