CN216286161U - Photosensitive drum charging structure of laser printer - Google Patents
Photosensitive drum charging structure of laser printer Download PDFInfo
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- CN216286161U CN216286161U CN202121163604.XU CN202121163604U CN216286161U CN 216286161 U CN216286161 U CN 216286161U CN 202121163604 U CN202121163604 U CN 202121163604U CN 216286161 U CN216286161 U CN 216286161U
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Abstract
The utility model discloses a photosensitive drum charging structure of a laser printer, which comprises a processing box shell and a photosensitive drum arranged in the processing box shell, and is characterized in that: the conductive sponge is arranged on the conductive support, the smooth working face of the conductive sponge is in surface contact with the photosensitive drum to realize electric connection, and the conductive support is in contact with the conductive sheet. This structure has adopted electrically conductive sponge to replace the roller that charges, and electrically conductive sponge is easily produced, but direct injection moulding, and electrically conductive sponge is very soft moreover, therefore can be with the abundant and even contact of sensitization drum, need not the grinding machine processing, and the required precision to the assembly is low moreover, therefore improved production efficiency greatly, also saved the cost.
Description
Technical Field
The utility model relates to a laser printer, in particular to a photosensitive drum charging structure of the laser printer.
Background
Laser printers are now commonly used in homes and companies as office equipment, and the main developing elements of a general laser printer are a photosensitive drum and a charging roller, and the photosensitive drum, which is a core component of an image forming apparatus, is an important basis for forming an image. The basic structure of a photosensitive drum is composed of a conductive substrate (an aluminum cylinder or other metal material), a photoconductive layer thereon, and a protective layer. The photoconductive layer is a photosensitive material, has high resistivity in a dark environment, is similar to an insulator, and can quickly become a conductor after being irradiated by light. Before exposure, the photoconductive layer is charged uniformly by a charging roller, the surface potential of the exposed part becomes lower after being irradiated by light to form a black area on an image, the charge is released to the ground by the conductive matrix, the surface potential of the unexposed part is high, and the white area on the formed image still maintains the original charge, so that a potential difference latent image (electrostatic latent image) is formed on the surface of the photoconductive drum. The charging roller is used for uniformly charging the surface of an OPC (optical proximity correction) photosensitive drum, and in order to ensure that the charging roller is uniformly contacted with the surface of the photosensitive drum, the surface precision requirement of the charging roller is very high, so that the common charging roller can reach the preset surface size and the preset surface smoothness only after being processed by a grinding machine, and the requirements of the charging roller on processing and installation are very high, thereby causing high cost.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides a photosensitive drum charging structure of a laser printer.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
laser printer sensitization drum structure of charging, including handling the box casing, set up the sensitization drum in handling the box casing, its characterized in that: the conductive sponge is arranged on the conductive support, the smooth working face of the conductive sponge is in surface contact with the photosensitive drum to realize electric connection, and the conductive support is in contact with the conductive sheet.
The conductive support is a steel plate, and the conductive sponge is adhered to the steel plate.
The processing box is characterized in that a cleaning scraper is arranged in the processing box shell and comprises a metal knife rest, the metal knife rest is a conductive support, the conductive sponge is arranged on the metal knife rest, and the conductive sheet is in contact with the metal knife rest.
The processing box comprises a processing box shell, a conductive elastic piece and a conductive sponge, wherein the processing box shell is internally and oppositely provided with the conductive elastic piece, two ends of the conductive bracket are extruded by the elastic force of the conductive elastic piece to enable the conductive sponge to be contacted with the surface of the photosensitive drum, and the conductive piece is contacted with the conductive elastic piece.
The processing box is characterized in that connecting columns are oppositely arranged in the processing box shell, and guide holes are formed in two ends of the conductive support.
The conductive elastic part is a spring, the spring is sleeved on the connecting column, one end of the spring is in contact with the conductive sheet, and the other end of the spring is in contact with the conductive support.
The conductive elastic piece is an elastic piece, one end of the elastic piece is fixed in the processing box shell, and the other end of the elastic piece is contacted with the conductive support.
The elastic electric conductor is conductive sponge.
The utility model has the beneficial effects that: this structure has adopted electrically conductive sponge to replace the roller that charges, and electrically conductive sponge is easily produced, but direct injection moulding, and electrically conductive sponge is very soft moreover, therefore can be with the abundant and even contact of sensitization drum, need not the grinding machine processing, and the required precision to the assembly is low moreover, therefore improved production efficiency greatly, also saved the cost.
Drawings
The utility model is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic diagram of a spring as the conductive elastic member of the present invention;
fig. 2 is a schematic structural view of the conductive elastic member of the present invention being an elastic sheet.
Detailed Description
Referring to fig. 1 and 2, the utility model discloses a photosensitive drum charging structure of a laser printer, which comprises a processing box shell 1, a photosensitive drum 2 arranged in the processing box shell 1, and a conductive support 3 fixed in the processing box shell 1, wherein a conductive sponge 4 is arranged on the conductive support 3, a smooth working surface of the conductive sponge 4 is in contact with the surface of the photosensitive drum 2 to realize electric connection, the conductive support 3 is in contact with a conductive sheet 5, and the elastic conductor is preferably the conductive sponge 4.
The first embodiment of the application: the conductive support 3 is a rectangular square steel plate, the conductive sponge 4 is adhered to the steel plate, the used glue is conductive glue, and the conductive sponge 4 and the conductive glue are conventional materials and are not detailed.
As a further optimized structure of the first embodiment, the process cartridge housing 1 is relatively provided with the conductive elastic member 6, the two ends of the conductive bracket 3 are pressed by the elastic force of the conductive elastic member 6 to make the conductive sponge 4 contact with the surface of the photosensitive drum 2, the conductive sheet 5 contacts with the conductive elastic member 6, because the conductive sponge 4 will gradually age and lose elasticity after being used for a long time, the contact between the conductive sponge 4 and the photosensitive drum 2 may be uneven to cause the reduction of the printing quality, and therefore the conductive sponge 4 can still uniformly contact with the photosensitive drum 2 after aging through the elasticity of the conductive elastic member 6, so that the service life of the conductive sponge 4 is prolonged.
As an optimized choice for the conductive elastic member 6: the conductive elastic part 6 can be a spring, the processing box shell 1 is relatively provided with a connecting column 7, two ends of the conductive support 3 are respectively provided with a guide hole, the spring is sleeved on the connecting column 7, one end of the spring is in contact with the conductive sheet 5, and the other end of the spring is in contact with the conductive support 3.
As the second optimization choice of the conductive elastic member 6: the conductive elastic member 6 can be an elastic sheet, one end of the elastic sheet is fixed in the processing box shell 1, and the other end of the elastic sheet is in contact with the conductive bracket 3, and the elastic sheet and the conductive sheet 5 are integrally connected and fixed in the processing box shell 1 through screws, however, the structure and the installation mode of the connecting column 7 and the conductive bracket 3 are the same as those of the first optimization selection, and only the conductive bracket 3 is applied to the conductive sponge 4 through the elastic force of the elastic sheet, so that the conductive sponge 4 keeps the trend of being in close contact with the photosensitive drum 2, and the service life of the conductive sponge 4 is prolonged.
The second embodiment of the application: in this embodiment, an original cleaning blade (not shown) in the casing 1 of the processing box is utilized, a metal blade carrier of the cleaning blade is used as the conductive support 3, the conductive sponge 4 is arranged on the metal blade carrier, and the conductive sheet 5 is in contact with the metal blade carrier, so that the modification is small, the cost is low, and the rapid mass production can be realized.
The above detailed description of the charging structure for the photosensitive drum 2 of the laser printer according to the embodiment of the present invention is provided, and the principle and the implementation of the present invention are explained in the present document by applying specific examples, and the above description of the embodiment is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (8)
1. Laser printer sensitization drum structure of charging, including handling the box casing, set up the sensitization drum in handling the box casing, its characterized in that: the device comprises a conductive support fixed in a processing box shell, wherein an elastic conductor is arranged on the conductive support, the smooth working surface of the elastic conductor is in contact with the surface of a photosensitive drum to realize electric connection, and the conductive support is in contact with a conductive sheet.
2. The laser printer photosensitive drum charging structure according to claim 1, wherein: the conductive support is a steel plate, and the conductive sponge is adhered to the steel plate.
3. The laser printer photosensitive drum charging structure according to claim 1, wherein: the cleaning scraper is arranged in the processing box shell and comprises a metal knife rest which is a conductive support, conductive sponge is arranged on the metal knife rest, and the conductive sheet is in contact with the metal knife rest.
4. The laser printer photosensitive drum charging structure according to claim 1, wherein: the processing box comprises a processing box shell, a conductive elastic piece and a conductive sponge, wherein the processing box shell is internally and oppositely provided with the conductive elastic piece, two ends of the conductive bracket are extruded by the elastic force of the conductive elastic piece to enable the conductive sponge to be contacted with the surface of the photosensitive drum, and the conductive piece is contacted with the conductive elastic piece.
5. The laser printer photosensitive drum charging structure according to claim 4, wherein: the processing box is characterized in that connecting columns are oppositely arranged in the processing box shell, and guide holes are formed in two ends of the conductive support.
6. The laser printer photosensitive drum charging structure according to claim 5, wherein: the conductive elastic part is a spring, the spring is sleeved on the connecting column, one end of the spring is in contact with the conductive sheet, and the other end of the spring is in contact with the conductive support.
7. The laser printer photosensitive drum charging structure according to claim 5, wherein: the conductive elastic piece is an elastic piece, one end of the elastic piece is fixed in the processing box shell, and the other end of the elastic piece is contacted with the conductive support.
8. The laser printer photosensitive drum charging structure according to claim 1, wherein: the elastic electric conductor is conductive sponge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121163604.XU CN216286161U (en) | 2021-05-27 | 2021-05-27 | Photosensitive drum charging structure of laser printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121163604.XU CN216286161U (en) | 2021-05-27 | 2021-05-27 | Photosensitive drum charging structure of laser printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216286161U true CN216286161U (en) | 2022-04-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121163604.XU Active CN216286161U (en) | 2021-05-27 | 2021-05-27 | Photosensitive drum charging structure of laser printer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216286161U (en) |
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2021
- 2021-05-27 CN CN202121163604.XU patent/CN216286161U/en active Active
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