Developing box and developing roller

Abstract

The utility model relates to a developing box which comprises a shell, a developing roller and a doctor blade, and the shell is provided with a cavity for accommodating a developing agent. The developing roller is rotatably mounted on the housing, the developing roller including a roller shaft. And the doctor blade is parallel to the developing roller. One end of the box electrode is electrically connected with the doctor blade, and the other end of the box electrode is electrically contacted with the equipment electrode. And a roller shaft of the developing roller is made of an insulating material. According to the developing box disclosed by the utility model, power is supplied to the doctor blade through the box electrode, and the doctor blade is in contact with the surface of the developing roller, so that a developing agent on the surface of the developing roller is charged. Therefore, the roller shaft of the developing roller can be made of insulating materials. The roller shaft of the developing roller is manufactured through plastic injection molding, the production and manufacturing cost of the developing roller and the developing box can be greatly reduced, the electroplating link is omitted, and the environment cannot be polluted. The utility model further relates to the developing roller used in the developing box.

Description

Technical Field

[0001] The utility model relates to a developing cartridge, in particular to a developing cartridge that can be detachably installed in a laser imaging device, and also to a developing roller used in the developing cartridge. Background Art

[0002] A conventional developer cartridge includes a housing and a developer roller rotatably mounted within the housing. The developer roller further includes a roller shaft and an elastic conductive layer. A cartridge-side electrode is provided at one end of the developer cartridge. The cartridge-side electrode is electrically connected to the roller shaft of the developer roller to charge the developer roller. When the developer cartridge is installed in an imaging device, the cartridge-side electrode electrically contacts a device-side electrode on one side of the imaging device. The cartridge-side electrode is typically in the form of a bearing, into which one end of the developer roller shaft extends, providing both support for the developer roller shaft and power to the developer roller.

[0003] In order to supply power to the developing roller, the roller shaft of the developing roller is made of metal. On the one hand, the processing cost of the developing roller shaft made of metal is high. On the other hand, the surface of the metal developing roller shaft needs to be electroplated, and the electroplating process is likely to cause environmental pollution. Utility Model Content

[0004] The purpose of the utility model is to provide a developing box, which has low production cost and does not require electroplating of the roller shaft of the developing roller, thereby avoiding environmental pollution.

[0005] To achieve the above objectives, the present invention comprises a developing cartridge comprising a housing, a developing roller, and a powder discharge blade. The housing comprises a cavity for accommodating a developer; the developing roller is rotatably mounted on the housing, and the developing roller comprises a roller shaft; the powder discharge blade is arranged parallel to the developing roller. The developing cartridge further comprises a cartridge electrode, one end of which is electrically connected to the powder discharge blade and the other end of which is electrically in contact with the device electrode. The roller shaft of the developing roller is made of an insulating material. The present invention developing cartridge can be detachably mounted on an imaging device, and the imaging device comprises a device electrode for supplying power to the developing cartridge.

[0006] In the developer cartridge of this utility model, power is supplied to the powder cutter via the cartridge electrodes. The powder cutter contacts the surface of the developer roller, thereby charging the developer on the surface of the developer roller. This allows the roller shaft of the developer roller to be made of insulating material. Using plastic injection molding to manufacture the roller shaft significantly reduces the manufacturing cost of the developer roller and the developer cartridge, eliminates the electroplating process, and reduces environmental pollution.

[0007] In one embodiment, the box electrode includes a first end and a second end, and the second end is electrically connected to the powder knife; when the developer box is installed to the imaging device, the first end can be electrically contacted with the device electrode of the imaging device.

[0008] In one embodiment, the first end of the box electrode has a compression spring. Through the expansion and contraction of the compression spring, good electrical contact can be achieved to avoid the box electrode and the device electrode from not being able to make electrical contact due to manufacturing errors.

[0009] In one embodiment, the developing box includes a bracket made of an insulating material, and the box electrode is mounted on the bracket.

[0010] In one embodiment, the bracket has a positioning column, and the compression spring is sleeved on the positioning column.

[0011] In one embodiment, the developing cartridge further includes a developing roller gear, the developing roller gear being located at one end of the roller shaft and being integrally formed with the roller shaft. The integral formation of the developing roller gear and the roller shaft is conducive to reducing manufacturing costs.

[0012] In one embodiment, the roller shaft of the developing roller is made of plastic.

[0013] The utility model also provides a developing roller, which can be rotatably mounted on a developing box, and the developing box can be detachably mounted in an imaging device. The developing roller includes a roller shaft, and the roller shaft is made of insulating material.

[0014] In one embodiment, the developing roller further includes a developing roller gear, which is located at one end of the roller shaft and is integrally formed with the roller shaft. The integral formation of the developing roller gear and the roller shaft is conducive to reducing production costs.

[0015] In one embodiment, the roller shaft of the developing roller is made of plastic. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of a developing box of the present invention according to one embodiment.

[0017] Figure 2 yes Figure 1 An exploded view of the developer cartridge is shown.

[0018] Figure 3 yes Figure 1 The shown figure is a three-dimensional view of the developer box with the shell removed.

[0019] Figure 4 yes Figure 3 The shown figure is a partial enlarged view of the developer box with the shell removed.

[0020] Figure 5 It is a three-dimensional diagram of the developing roller of the present utility model. DETAILED DESCRIPTION

[0021] The structure of the developing box and the developing roller of the present invention and other aspects are further described in detail below through specific implementations and with reference to the accompanying drawings.

[0022] like Figures 1 to 3 As shown, the developer cartridge of the present invention includes a housing 1, a developing roller 2, a powder feeding roller 3, and a drive assembly 4. The developing roller 2 and the powder feeding roller 3 are rotatably mounted on the housing 1. The housing 1 has a cavity for accommodating a developer (not shown in the figure). The housing 1 has a first side 11 and a second side 12. The drive assembly 4 is mounted on the first side 11 of the housing 1. The drive assembly 4 is used to drive rotating parts such as the developing roller 2 and the powder feeding roller 3 to rotate. The drive assembly 4 includes, for example, a power receiving port 41, a developing roller gear 42, a powder feeding roller gear 43, and an intermediate gear. The power receiving port 41 is used to receive driving force from the imaging device. The developing roller gear 42 is mounted on the end of the developing roller 2 and can rotate coaxially with the developing roller 2. The powder feeding roller gear 43 is mounted on the end of the powder feeding roller 3 and can rotate coaxially with the powder feeding roller 3.

[0023] The developer cartridge of the utility model can be detachably mounted on the drum cartridge and then detachably mounted together with the drum cartridge in an imaging device. The drum cartridge includes a photosensitive drum, and the developer on the developer roller of the developer cartridge is transferred from the developer roller to the photosensitive drum under the action of the electric charge, thereby realizing the so-called development process.

[0024] The present invention also includes a powder knife 5 and a box electrode 6. The powder knife 5 is fixedly mounted on the housing 1 and arranged parallel to the axial direction of the developing roller 2. The powder knife 5 is made of metal. The blade of the powder knife 5 contacts the circumferential surface of the developing roller 2 to control the thickness of the developer on the developing roller 2. The box electrode 6 is electrically connected to the powder knife 5. Figure 4 As shown, the box electrode 6 includes a first end 61 and a second end 62, and the second end 62 is electrically connected to the powder discharge knife 5. When the developer cartridge is installed in the imaging device, the first end 61 of the box electrode 6 can be electrically contacted with the device electrode of the imaging device, thereby supplying power to the powder discharge knife 5 through the imaging device, and then supplying power to the circumferential surface of the developer roller 2 to charge the developer on the surface of the developer roller 2. In a specific embodiment, the first end 61 of the box electrode 6 has a compression spring, and the second end 62 of the box electrode 6 is annular.

[0025] In a preferred embodiment, the developer cartridge of the present invention further includes a bracket 7 made of an insulating material. The bracket 7 is mounted on the second side 12 of the housing 1, i.e., the side away from the drive assembly 4. The bracket 7 is provided with a bearing hole for supporting one end of the roller shaft 21 of the developer roller 2 or one end of the roller shaft of the powder feed roller 3. The bracket 7 is also provided with a positioning post 71. The compression spring of the first end 61 of the cartridge electrode 6 is sleeved on the positioning post 71, thereby positioning the first end 61 of the cartridge electrode 6.

[0026] The powder discharge knife 5 has mounting holes 51 at both ends, and both ends of the powder discharge knife 5 are fixed to the housing 1 by screws. In the developer cartridge of the present invention, the screws for fixing the powder discharge knife 5 pass through the mounting holes 51 of the powder discharge knife 5 and the ring on the second end 62 of the cartridge electrode 6, thereby achieving electrical connection between the powder discharge knife 5 and the second end 62 of the cartridge electrode 6.

[0027] like Figure 5 As shown, the developing roller 2 includes a roller shaft 21 and an elastic conductive layer 22 wrapped on the outer circumference of the roller shaft 21. The elastic conductive layer 22 includes a cotton sleeve and a leather sleeve. The cotton sleeve is sleeved on the roller shaft 21, and the leather sleeve is sleeved on the cotton sleeve.

[0028] In the prior art, to charge the developer on the surface of the developer roller 2, a metal roller shaft of the developer roller is used to conduct electricity, and a cartridge electrode electrically connects the roller shaft of the developer roller to a device electrode of the imaging device. The metal roller shaft of the developer roller is expensive to manufacture, and the surface of the metal roller shaft requires electroplating, a process that pollutes the environment.

[0029] In the developer cartridge of the present invention, the roller shaft 21 of the developer roller 2 is made of an insulating material, such as plastic. Using plastic injection molding to manufacture the roller shaft of the developer roller significantly reduces the production cost of the developer roller and eliminates the electroplating process, thereby preventing environmental pollution. In the developer cartridge of the present invention, power is supplied to the powder blade 5 via the cartridge electrode 6. The powder blade 5 contacts the surface of the developer roller 2, thereby charging the developer on the surface of the developer roller 2.

[0030] In a preferred embodiment, the developing roller gear 42 at the end of the developing roller 2 can be integrally injection-molded with the roller shaft 21 of the developing roller 2, which can reduce the cost of producing the developing cartridge.

[0031] The developer cartridge of the present invention further includes a first end cover 8 and a second end cover 9. The first end cover 8 is mounted on a first side 11 of the housing 1. The drive assembly 4 is located between the housing 1 and the first end cover 8. The first end cover 8 protects the drive assembly 4. The second end cover 9 is mounted on a second side 12 of the housing 1. The bracket 7 and the cartridge electrode 6 are located between the second end cover 9 and the housing 1. The second end cover 9 protects the cartridge electrode 6.

[0032] The above embodiments are intended only to illustrate the concept and scope of the present invention and are not intended to limit the scope of protection of the present invention. Modifications, equivalent substitutions, and other improvements to the above embodiments that are obvious to those skilled in the art are also within the concept of the present invention. The scope and concept of protection of the present invention are specifically defined by the claims.

Claims

1. A developing cartridge, the developing cartridge being detachably mounted on an imaging device, the imaging device having a device electrode for supplying power to the developing cartridge; the developing cartridge comprising: a housing having a cavity for accommodating a developer; a developing roller rotatably mounted on the housing, the developing roller including a roller shaft; and The powder discharge knife is arranged parallel to the developing roller; characterized in that: The developing box further comprises a box electrode, one end of which is electrically connected to the powder discharging knife, and the other end of which is electrically in contact with the device electrode; The roller shaft of the developing roller is made of insulating material.

2. The developing cartridge according to claim 1, wherein The box electrode includes a first end and a second end, the second end is electrically connected to the powder discharge knife; when the developing box is installed to the imaging device, the first end can be electrically contacted with the device electrode of the imaging device.

3. The developing cartridge according to claim 2, wherein: The first end of the box electrode has a compression spring.

4. The developing cartridge according to claim 3, wherein: The developing box includes a bracket made of an insulating material, and the box electrode is installed on the bracket.

5. The developing cartridge according to claim 4, wherein: The bracket is provided with a positioning column, and the compression spring is sleeved on the positioning column.

6. The developing cartridge according to claim 1, wherein: The developing box further includes a developing roller gear, which is located at one end of the roller shaft and is integrally formed with the roller shaft.

7. The developing cartridge according to claim 1, wherein: The roller shaft of the developing roller is made of plastic.

8. A developing roller, rotatably mounted on a developing cartridge, wherein the developing cartridge is detachably mounted in an imaging device; The developing roller includes a roller shaft made of an insulating material.

9. The developing roller according to claim 8, wherein The developing roller further includes a developing roller gear, which is located at one end of the roller shaft and is integrally formed with the roller shaft.

10. The developing roller according to claim 8, wherein The roller shaft of the developing roller is made of plastic.

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