CN217113046U - Developing box - Google Patents

Abstract

The utility model discloses a developing box. The developing box of the embodiment comprises a box body, a developing roller, a powder feeding roller and a powder discharging knife, wherein a conductive structure is arranged at one longitudinal end of the box body, and the conductive structure comprises a first conductive piece and a second conductive piece which are arranged in a split mode; the first conductive piece comprises a first connecting part, a second connecting part and a third connecting part, the first connecting part is electrically connected with the powder feeding roller shaft, and the second connecting part is electrically connected with the developing roller shaft; the first conductive end of the second conductive piece is electrically connected with the third connecting part, and the second conductive end of the second conductive piece is electrically connected with the powder discharging knife; the tip of the powder feed roller shaft is exposed from the longitudinal end of the case for receiving external power. In the developing box of the embodiment, the powder feeding roller shaft receives power from the electronic photographic imaging device and transmits the power to the developing roller and the powder discharging knife through the first conductive piece and the second conductive piece which are separately arranged, and the developing box has the advantages of simple and reliable conductive structure and low cost.

Description

Developing box

Technical Field

The utility model relates to a developing box for electronic photography imaging device.

Background

The developing cartridge may be mounted to an electrophotographic image forming apparatus such as a laser printer, a copying machine, a facsimile machine, etc., alone or after forming a process cartridge with a photosensitive drum cartridge, for supplying a developer to the photosensitive drum to develop an electrostatic latent image on the photosensitive drum.

Generally, a developing cartridge includes a developing roller, a powder feed roller, and a powder discharge blade; the developing roller is used for conveying the developer to the photosensitive drum, the powder feeding roller is used for conveying the developer contained in the developing box to the developing roller, and the powder discharging blade is used for controlling the thickness of the developer on the surface of the developing roller. When the developing cartridge is in operation, the developing roller, the powder discharging roller and the powder discharging blade all need to be electrically connected to the electrophotographic image forming apparatus.

In some prior arts, a conductive sheet for receiving power from an electrophotographic image forming apparatus is provided at a conductive end portion of a developing cartridge, and the conductive sheet is directly or indirectly electrically connected to a developing roller, a powder feeding roller and a powder discharging blade to transmit power of the electrophotographic image forming apparatus to the developing roller, the powder discharging roller and the powder discharging blade, but an electrical contact surface of the conductive sheet electrically connected to the electrophotographic image forming apparatus is exposed outside the developing cartridge and is easily contaminated and corroded to affect a conductive effect. In other prior art, a conductive bracket made of resin is disposed at a conductive end of the developing cartridge, and the conductive bracket supports the developing roller shaft and the powder feeding roller shaft to transmit power received from the electrophotographic image forming apparatus to the developing roller and the powder feeding roller, and further transmit the power to the powder discharging blade through an intermediate conductive member.

Disclosure of Invention

The utility model mainly aims at providing a developing box with simple and reliable conductive structure and lower cost.

In order to achieve the above main object, an embodiment provides a developing cartridge, including a cartridge body, a developing roller, a powder feeding roller, and a powder discharging blade, wherein one of longitudinal ends of the cartridge body is provided with a conductive structure; the conductive structure comprises a first conductive piece and a second conductive piece which are arranged in a split mode; the first conductive piece comprises a first connecting part, a second connecting part and a third connecting part, the first connecting part is electrically connected with the powder feeding roller shaft, and the second connecting part is electrically connected with the developing roller shaft; the first conductive end of the second conductive piece is electrically connected with the third connecting part, and the second conductive end of the second conductive piece is electrically connected with the powder discharging knife; the tip of the powder feed roller shaft is exposed from the longitudinal end of the case for receiving external power.

Among the above-mentioned technical scheme, receive external electric power from electrophotographic image forming apparatus through the powder feeding roller axle rather than conducting strip or electrically conductive support to through the first electrically conductive piece and the second electrically conductive piece that the components of a whole that can function independently set up with electric power transmission to developer roll and powder-out sword, have the advantage that electrically conductive structure is simple reliable and with low costs.

According to a specific embodiment of the present invention, one of the longitudinal ends of the case body is provided with a non-conductive holder rotatably supporting the developing roller shaft and the powder feeding roller shaft, and the first conductive member is mounted on the non-conductive holder.

In a more specific aspect of the present invention, the non-conductive bracket is provided with a window for the first conductive member to pass through; the first connecting portion and the second connecting portion are disposed on the inner side of the non-conductive bracket, and the third connecting portion is disposed on the outer side of the non-conductive bracket.

In another more specific aspect of the present invention, the first conductive end of the second conductive member and the third connecting portion of the first conductive member are fixed to the outer side surface of the non-conductive bracket by the first fastening member.

In a still more particular aspect of the present invention, the non-conductive support has a first support shaft sleeve supporting the powder feeding roller shaft, and the end of the powder feeding roller shaft extends from the outer end of the first support shaft sleeve for receiving external electric power.

Furthermore, a first limiting groove for limiting the first connecting part is formed in the inner end of the first supporting shaft sleeve; the free end of the first connecting part is provided with a first bending part, and the first bending part extends into the first supporting shaft sleeve and is in elastic electric contact with the powder feeding roller shaft.

In yet another more particular aspect of the present invention, the non-conductive bracket has a second support sleeve supporting the developer roller shaft; the inner end of the second supporting shaft sleeve is provided with a second limiting groove for limiting the second connecting part, the free end of the second connecting part is provided with a second bending part, and the second bending part extends into the second supporting shaft sleeve and is in elastic electrical contact with the developing roller shaft.

According to a specific embodiment of the utility model, go out the powder sword and have the blade and support the knife rest of blade, the electrically conductive end of second of the electrically conductive piece is fixed on the knife rest through the second fastener.

According to an embodiment of the present invention, the first conductive member is a conductive sheet having an integrated structure.

According to a specific embodiment of the present invention, the second conductive member is a conductive filament having an integrated structure.

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

Drawings

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

FIG. 2 is an enlarged partial view of portion C of FIG. 1;

FIG. 3 is an exploded view of a second longitudinal end of the developing cartridge in the embodiment;

FIG. 4 is a perspective view of a non-conductive bracket portion of an embodiment;

FIG. 5 is an inside elevational view of the non-conductive bracket portion of the embodiment;

fig. 6 is a perspective view of the first conductive member in the embodiment.

Detailed Description

As shown in fig. 1, the developing cartridge of the embodiment includes a cartridge body 10, a developing roller 20, a powder feed roller (not visible in the drawing), and a powder discharge blade 30. Wherein, the powder outlet blade 30 is arranged along the axial direction of the developing roller 20 and comprises a blade 32 and a blade holder 31 for supporting the blade 32; the blade holder 31 is fixed to the cartridge body 10 by a plurality of fasteners 34 such as screws, and the blade 32 is brought into elastic contact with the developing roller 20 to adjust the thickness of the developer on the surface of the developing roller 20.

The cartridge 10 has a first longitudinal end and a second longitudinal end which are oppositely disposed in the axial direction of the developing roller 20, and the first longitudinal end of the cartridge 10 is provided with a driving assembly for receiving a rotational driving force from the electrophotographic image forming apparatus to drive the developing roller 20 and the powder feed roller to rotate, for example, to drive the developing roller 20 to rotate via the gear transmission 61.

The second longitudinal end of the case 10 is provided with a non-conductive holder 11. As shown in fig. 4, a plurality of fasteners 114 are disposed on the non-conductive rack 11, and the fasteners 114 are connected to the box 10 to fix the non-conductive rack 11 to the box 10.

The non-conductive holder 11 rotatably supports the developing roller shaft 21 and the powder feeding roller shaft 51; wherein a tip of the powder feeding roller shaft 51 is exposed from a second longitudinal end of the cartridge 10 for receiving external power from the electrophotographic image forming apparatus. Specifically, as shown in fig. 2 to 3, the non-conductive holder 11 has a first support boss 111 supporting the powder feeding roller shaft 51, and the distal end of the powder feeding roller shaft 51 protrudes from the outer end of the first support boss 111 to receive external power.

As shown in fig. 2 and 3, the second longitudinal end of the box body 10 is further provided with a conductive structure, which includes a first conductive member 41 and a second conductive member 42 that are separately arranged; the first conductive member 41 may be a conductive sheet with an integrated structure, and the second conductive member 42 may be a conductive filament with an integrated structure, but the present invention is not limited thereto.

Specifically, as shown in fig. 4 to 6, the first conductive member 41 is a conductive sheet of an integrated structure and is mounted on the non-conductive support 11. The first conductor 41 has a first connection portion 411, a second connection portion 412, and a third connection portion 413; the non-conductive support 11 is provided with a window 113 for the first conductive member 41 to pass through, the first connection portion 411 and the second connection portion 412 are disposed on the inner side of the non-conductive support 11, and the third connection portion 413 is disposed on the outer side of the non-conductive support 11. Thus, the assembly of the first conductive member 41 and the second conductive member 42 is facilitated.

In the embodiment of the present invention, the first connecting portion 411 is electrically connected to the powder feeding roller shaft 51, and the second connecting portion 412 is electrically connected to the developing roller shaft 21. Specifically, as shown in fig. 3 to 5, the inner end of the first supporting shaft sleeve 111 is provided with a first limiting groove 1111 for limiting the first connecting portion 411; the free end of the first connecting portion 411 has a first bent portion 4111, and the first bent portion 4111 extends into the first supporting sleeve 111 and makes elastic electrical contact with the powder feeding roller shaft 51. Preferably, as shown in FIGS. 5 and 6, the first bending portion 4111 is provided with a first resilient protrusion 4112 to enhance the reliability of the electrical connection between the first bending portion 4111 and the powder feeding roller shaft 51.

As shown in fig. 3 to 5, the non-conductive bracket 11 further has a second supporting sleeve 112 supporting the developing roller shaft 21, and the inner end of the second supporting sleeve 112 is provided with a second limiting groove 1121 limiting the second connecting portion 412; wherein, the free end of the second connecting portion 412 has a second bending portion 4121, and the second bending portion 4121 extends into the second supporting sleeve 112 and forms an elastic electrical contact with the developing roller shaft 21. Preferably, as shown in fig. 5 and 6, the second bending portion 4121 is provided with a second elastic protrusion 4122 to enhance reliability of electrical connection between the second bending portion 4121 and the developing roller shaft 21.

Referring to fig. 2-3 again, the second conductive member 42 is a conductive filament with an integrated structure and has a first conductive end 421 and a second conductive end 422. Wherein, a screw 43 as an example of a first fastener is fixedly connected with the box body 10 after passing through the non-conductive bracket 11, the first conductive end 421 and the third connecting portion 413 are sleeved on the screw 43 and fixed on the outer side surface of the non-conductive bracket 11 by the screw 43, so that the first conductive end 421 and the third connecting portion 413 form an electrical connection; the second conductive end 422 of the second conductive member 42 may be fixed to the blade holder 31 by a screw 33 as an example of a second fastener such that the second conductive end 422 is electrically connected to the doctor blade 30. Thus, the external power received by the powder feeding roller shaft 51 can be transmitted to the powder discharging blade 30 through the first conductive member 41 and the second conductive member 42.

Further, a gasket may be provided on the screw 33 and the screw 43, and the gasket may be provided on the outer side of the conductive member. For example, as shown in fig. 3, the screw 43 may be sleeved with a washer 431 disposed outside the first conductive end 421 and the third connection portion 413, so as to prevent the screw 43 from being loosened and damaged by the first conductive end 421 and the third connection portion 413 when the screw 43 is locked.

Although the present invention has been described above by way of examples, it should be understood that the above examples are merely illustrative of the possible embodiments of the present invention and should not be read as limiting the scope of the present invention, i.e. all equivalent permutations or variations that can be made by those skilled in the art in accordance with the present invention should also be covered by the scope of the claims of the present invention.

Claims (10)

1. The utility model provides a developing box, includes box body, developer roll, send whitewashed roller and powder-out sword, one of them vertical tip of box body is equipped with electrically conductive structure, its characterized in that: the conductive structure comprises a first conductive piece and a second conductive piece which are arranged in a split mode; the first conductive piece comprises a first connecting part, a second connecting part and a third connecting part, the first connecting part is electrically connected with the powder feeding roller shaft, and the second connecting part is electrically connected with the developing roller shaft; the first conductive end of the second conductive piece is electrically connected with the third connecting part, and the second conductive end of the second conductive piece is electrically connected with the powder discharging knife; the tip of the powder feed roller shaft is exposed from the longitudinal end portion for receiving external power.

2. A developing cartridge according to claim 1, wherein: the longitudinal end portion is provided with a non-conductive bracket rotatably supporting the developing roller shaft and the powder feeding roller shaft, and the first conductive member is mounted on the non-conductive bracket.

3. A developing cartridge according to claim 2, wherein: the non-conductive bracket is provided with a window for the first conductive piece to pass through; the first connecting portion and the second connecting portion are disposed at an inner side of the non-conductive bracket, and the third connecting portion is disposed at an outer side of the non-conductive bracket.

4. A developing cartridge according to claim 2, wherein: the first conductive end and the third connecting portion are fixed to the outer surface of the non-conductive bracket by a first fastener.

5. A developing cartridge according to claim 2, wherein: the non-conductive support is provided with a first supporting shaft sleeve for supporting the powder feeding roller shaft, and the tail end of the powder feeding roller shaft extends out of the outer end of the first supporting shaft sleeve and is used for receiving external power.

6. A developing cartridge according to claim 5, wherein: the inner end of the first supporting shaft sleeve is provided with a first limiting groove for limiting the first connecting part; the free end of the first connecting part is provided with a first bending part, and the first bending part extends into the first supporting shaft sleeve and is in elastic electrical contact with the powder feeding roller shaft.

7. A developing cartridge according to claim 2, wherein: the non-conductive bracket has a second supporting shaft sleeve supporting the developing roller shaft; the inner end of the second supporting shaft sleeve is provided with a second limiting groove for limiting the second connecting part, the free end of the second connecting part is provided with a second bending part, and the second bending part extends into the second supporting shaft sleeve and is in elastic electrical contact with the developing roller shaft.

8. A developing cartridge according to claim 1, wherein: the powder outlet knife is provided with a blade and a knife rest for supporting the blade, and the second conductive end is fixed on the knife rest through a second fastener.

9. A developing cartridge according to claim 1, wherein: the first conductive piece is a conductive piece with an integrated structure.

10. A developing cartridge according to claim 1, wherein: the second conductive piece is a conductive wire with an integrated structure.

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